<?php
declare(strict_types=1);

// Sessions setup
$sessions_dir = __DIR__ . '/sessions';
if (!is_dir($sessions_dir)) {
    @mkdir($sessions_dir, 0777, true);
}
if (is_writable($sessions_dir)) {
    session_save_path("0;0660;" . $sessions_dir);
}

// Check for required extensions
$required_extensions = ['pdo', 'pdo_mysql', 'curl', 'json'];
$missing_extensions = [];
foreach ($required_extensions as $ext) {
    if (!extension_loaded($ext)) {
        $missing_extensions[] = $ext;
    }
}

if (!empty($missing_extensions)) {
    die("Error: The following PHP extensions are required but missing: " . implode(', ', $missing_extensions) . ". Please contact your hosting provider to enable them.");
}

// Enhanced session security and iframe compatibility
if ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on') || (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https')) {
    session_set_cookie_params([
        'lifetime' => 0,
        'path' => '/',
        'secure' => true,
        'httponly' => true,
        'samesite' => 'None',
    ]);
}

session_start();
if (isset($_GET['action']) && $_GET['action'] === 'download_items_template') {
    header('Content-Type: text/csv; charset=utf-8');
    header('Content-Disposition: attachment; filename=items_import_template.csv');
    $output = fopen('php://output', 'w');
    // Add BOM for Excel UTF-8 compatibility
    fprintf($output, chr(0xEF).chr(0xBB).chr(0xBF));
    fputcsv($output, ['SKU', 'English Name', 'Arabic Name', 'Sale Price', 'Cost Price']);
    fclose($output);
    exit;
}
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    file_put_contents('post_debug.log', date('Y-m-d H:i:s') . " - POST: " . json_encode($_POST) . "\n", FILE_APPEND);
}
require_once __DIR__ . '/db/config.php';
require_once __DIR__ . '/includes/SimpleXLSX.php';
require_once __DIR__ . '/includes/stock_helper.php';
require_once __DIR__ . '/db/BackupService.php';

// Helper for current outlet
if (!function_exists('current_outlet_id')) {
    function current_outlet_id() {
        if (session_status() === PHP_SESSION_NONE) session_start();
        return (int)($_SESSION['outlet_id'] ?? 1);
    }
}

if (!function_exists('db_table_exists')) {
    function db_table_exists(string $tableName): bool {
        static $cache = [];

        $normalized = strtolower($tableName);
        if (array_key_exists($normalized, $cache)) {
            return $cache[$normalized];
        }

        try {
            $stmt = db()->prepare("SELECT 1 FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = ? LIMIT 1");
            $stmt->execute([$tableName]);
            $cache[$normalized] = (bool)$stmt->fetchColumn();
        } catch (Throwable $e) {
            $cache[$normalized] = false;
        }

        return $cache[$normalized];
    }
}

if (!function_exists('db_column_exists')) {
    function db_column_exists(string $tableName, string $columnName): bool {
        static $cache = [];

        $cacheKey = strtolower($tableName . '.' . $columnName);
        if (array_key_exists($cacheKey, $cache)) {
            return $cache[$cacheKey];
        }

        try {
            $stmt = db()->prepare("SELECT 1 FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = ? AND COLUMN_NAME = ? LIMIT 1");
            $stmt->execute([$tableName, $columnName]);
            $cache[$cacheKey] = (bool)$stmt->fetchColumn();
        } catch (Throwable $e) {
            $cache[$cacheKey] = false;
        }

        return $cache[$cacheKey];
    }
}

if (!function_exists('db_first_existing_column')) {
    function db_first_existing_column(string $tableName, array $columnNames): ?string {
        foreach ($columnNames as $columnName) {
            if (db_column_exists($tableName, (string)$columnName)) {
                return (string)$columnName;
            }
        }

        return null;
    }
}

if (!function_exists('entity_tax_column')) {
    function entity_tax_column(string $tableName): ?string {
        return db_first_existing_column($tableName, ['tax_id', 'tax_number', 'vat_number', 'tax_no', 'vat_no', 'trn']);
    }
}

if (!function_exists('db_insert_sql_for_existing_columns')) {
    function db_insert_sql_for_existing_columns(string $tableName, array $columnValueMap): array {
        $columns = [];
        $values = [];

        foreach ($columnValueMap as $columnName => $value) {
            if (!db_column_exists($tableName, (string)$columnName)) {
                continue;
            }

            $columns[] = (string)$columnName;
            $values[] = $value;
        }

        if (empty($columns)) {
            throw new RuntimeException("No compatible insert columns found for {$tableName}.");
        }

        $quotedColumns = '`' . implode('`, `', $columns) . '`';
        $placeholders = implode(', ', array_fill(0, count($columns), '?'));

        return ["INSERT INTO `{$tableName}` ({$quotedColumns}) VALUES ({$placeholders})", $values];
    }
}

if (!function_exists('sales_return_reference_column')) {
    function sales_return_reference_column(): string {
        return db_first_existing_column('sales_returns', ['invoice_id', 'sale_id']) ?? 'invoice_id';
    }
}

if (!function_exists('purchase_return_reference_column')) {
    function purchase_return_reference_column(): string {
        return db_first_existing_column('purchase_returns', ['invoice_id', 'purchase_id']) ?? 'invoice_id';
    }
}

if (!function_exists('line_item_vat_amount')) {
    function line_item_vat_amount(PDO $db, array $item): float {
        if (isset($item['vat_amount']) && $item['vat_amount'] !== '' && $item['vat_amount'] !== null) {
            return (float)$item['vat_amount'];
        }

        $vatRate = 0.0;
        if (isset($item['vat_rate']) && $item['vat_rate'] !== '' && $item['vat_rate'] !== null) {
            $vatRate = (float)$item['vat_rate'];
        } elseif (!empty($item['item_id'])) {
            $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
            $stmtVat->execute([(int)$item['item_id']]);
            $vatRate = (float)$stmtVat->fetchColumn();
        }

        $lineTotal = isset($item['total_price']) && $item['total_price'] !== null
            ? (float)$item['total_price']
            : ((float)($item['quantity'] ?? 0) * (float)($item['unit_price'] ?? 0));

        return $lineTotal * ($vatRate / 100);
    }
}

if (!function_exists('runtime_debug_can_render_details')) {
    function runtime_debug_can_render_details(): bool {
        if (PHP_SAPI === 'cli') {
            return true;
        }

        $roleName = (string)($_SESSION['user_role_name'] ?? '');
        if (strcasecmp($roleName, 'Administrator') === 0 || (int)($_SESSION['user_id'] ?? 0) === 1) {
            return true;
        }

        $remoteAddress = $_SERVER['REMOTE_ADDR'] ?? '';
        return in_array($remoteAddress, ['127.0.0.1', '::1'], true);
    }
}

if (!function_exists('runtime_debug_infer_schema_hint')) {
    function runtime_debug_infer_schema_hint(Throwable $throwable): ?string {
        $message = $throwable->getMessage();

        if (str_contains($message, 'Call to undefined method DatabaseInstaller::ensureCurrentSchema()')) {
            return 'Outdated installer class: re-sync includes/DatabaseInstaller.php with the latest project version.';
        }

        if (preg_match("/Table '[^']+\.([^']+)' doesn't exist/i", $message, $matches)) {
            return 'Missing table: ' . $matches[1];
        }

        if (preg_match("/Unknown column '([^']+)'/i", $message, $matches)) {
            return 'Missing column: ' . $matches[1];
        }

        if (preg_match('/Base table or view not found: [0-9]+ ([a-zA-Z0-9_]+)/i', $message, $matches)) {
            return 'Missing table or view: ' . $matches[1];
        }

        return null;
    }
}

if (!function_exists('runtime_debug_log')) {
    function runtime_debug_log(Throwable $throwable): void {
        $parts = [
            date('Y-m-d H:i:s'),
            '[' . get_class($throwable) . ']',
            $throwable->getMessage(),
            'file=' . $throwable->getFile() . ':' . $throwable->getLine(),
            'page=' . ($_GET['page'] ?? 'dashboard'),
            'uri=' . ($_SERVER['REQUEST_URI'] ?? 'cli'),
            'user_id=' . (string)($_SESSION['user_id'] ?? 0),
        ];

        $hint = runtime_debug_infer_schema_hint($throwable);
        if ($hint !== null) {
            $parts[] = 'hint=' . $hint;
        }

        if ($throwable instanceof PDOException && isset($throwable->errorInfo) && is_array($throwable->errorInfo)) {
            $parts[] = 'error_info=' . json_encode($throwable->errorInfo, JSON_UNESCAPED_UNICODE);
        }

        $trace = explode("
", $throwable->getTraceAsString());
        if ($trace !== []) {
            $parts[] = 'trace=' . implode(' | ', array_slice($trace, 0, 5));
        }

        @file_put_contents(__DIR__ . '/runtime_debug.log', implode(' || ', $parts) . PHP_EOL, FILE_APPEND);
    }
}

if (!function_exists('runtime_debug_render_exception')) {
    function runtime_debug_render_exception(Throwable $throwable): void {
        runtime_debug_log($throwable);
        $showDetails = runtime_debug_can_render_details();

        while (ob_get_level() > 0) {
            @ob_end_clean();
        }

        if (!headers_sent()) {
            http_response_code(500);
            header('Content-Type: text/html; charset=UTF-8');
            header('X-Robots-Tag: noindex, nofollow');
        }

        $hint = runtime_debug_infer_schema_hint($throwable);
        $requestUri = (string)($_SERVER['REQUEST_URI'] ?? 'cli');
        $page = (string)($_GET['page'] ?? 'dashboard');
        $tracePreview = array_slice(explode("
", $throwable->getTraceAsString()), 0, 8);
        $traceText = implode("
", $tracePreview);
        $title = $showDetails ? 'Application Debug' : 'Application Error';
        $summary = $showDetails
            ? 'The request failed. The details below should help identify the missing table or column.'
            : 'An unexpected error occurred while loading this page.';
        ?>
        <!doctype html>
        <html lang="en">
        <head>
            <meta charset="utf-8">
            <meta name="viewport" content="width=device-width, initial-scale=1">
            <meta name="robots" content="noindex, nofollow">
            <title><?= htmlspecialchars($title) ?></title>
            <style>
                body { margin: 0; font-family: Inter, Arial, sans-serif; background: #f6f8fb; color: #1f2937; }
                .wrap { max-width: 900px; margin: 48px auto; padding: 0 20px; }
                .card { background: #fff; border-radius: 18px; box-shadow: 0 18px 60px rgba(15, 23, 42, 0.08); padding: 28px; }
                h1 { margin: 0 0 10px; font-size: 28px; }
                p { color: #4b5563; line-height: 1.6; }
                .badge { display: inline-block; padding: 6px 10px; border-radius: 999px; background: #fee2e2; color: #991b1b; font-weight: 600; font-size: 13px; }
                .grid { display: grid; grid-template-columns: 180px 1fr; gap: 12px 16px; margin-top: 22px; }
                .label { font-weight: 700; color: #111827; }
                .value { word-break: break-word; }
                .hint { margin-top: 18px; padding: 14px 16px; border-radius: 14px; background: #fff7ed; color: #9a3412; border: 1px solid #fed7aa; }
                pre { margin: 18px 0 0; padding: 16px; background: #0f172a; color: #e2e8f0; border-radius: 14px; overflow: auto; font-size: 12px; line-height: 1.5; }
                .actions { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; }
                .btn { display: inline-block; text-decoration: none; border-radius: 12px; padding: 10px 14px; font-weight: 600; }
                .btn-primary { background: #2563eb; color: #fff; }
                .btn-secondary { background: #e5e7eb; color: #111827; }
                .note { margin-top: 20px; font-size: 14px; color: #6b7280; }
            </style>
        </head>
        <body>
            <main class="wrap">
                <section class="card">
                    <span class="badge">HTTP 500</span>
                    <h1><?= htmlspecialchars($title) ?></h1>
                    <p><?= htmlspecialchars($summary) ?></p>

                    <?php if ($showDetails): ?>
                        <div class="grid">
                            <div class="label">Exception</div>
                            <div class="value"><?= htmlspecialchars(get_class($throwable)) ?></div>
                            <div class="label">Message</div>
                            <div class="value"><?= htmlspecialchars($throwable->getMessage()) ?></div>
                            <div class="label">File</div>
                            <div class="value"><?= htmlspecialchars($throwable->getFile()) ?></div>
                            <div class="label">Line</div>
                            <div class="value"><?= (int)$throwable->getLine() ?></div>
                            <div class="label">Page</div>
                            <div class="value"><?= htmlspecialchars($page) ?></div>
                            <div class="label">Request URI</div>
                            <div class="value"><?= htmlspecialchars($requestUri) ?></div>
                        </div>

                        <?php if ($hint !== null): ?>
                            <div class="hint"><strong>Schema hint:</strong> <?= htmlspecialchars($hint) ?></div>
                        <?php endif; ?>

                        <?php if ($traceText !== ''): ?>
                            <pre><?= htmlspecialchars($traceText) ?></pre>
                        <?php endif; ?>

                        <div class="actions">
                            <a class="btn btn-primary" href="schema_debug.php">Open schema debug report</a>
                            <a class="btn btn-secondary" href="index.php">Retry dashboard</a>
                        </div>

                        <p class="note">A copy of this failure was written to <code>runtime_debug.log</code>.</p>
                    <?php else: ?>
                        <div class="actions">
                            <a class="btn btn-secondary" href="index.php">Back to home</a>
                        </div>
                    <?php endif; ?>
                </section>
            </main>
        </body>
        </html>
        <?php
        exit;
    }
}

if (!defined('APP_RUNTIME_DEBUG_HANDLER_REGISTERED')) {
    define('APP_RUNTIME_DEBUG_HANDLER_REGISTERED', true);
    set_exception_handler(static function (Throwable $throwable): void {
        runtime_debug_render_exception($throwable);
    });
}

// Handle Outlet Switch
if (isset($_GET['action']) && $_GET['action'] === 'switch_outlet' && isset($_GET['id'])) {
    $target_id = (int)$_GET['id'];
    $allowed_outlets = $_SESSION['user_outlets'] ?? [1];
    $is_admin = ($_SESSION['user_role_name'] ?? '') === 'Administrator';
    
    if ($target_id === -1) {
        $_SESSION['outlet_id'] = -1;
    } elseif ($is_admin || in_array($target_id, $allowed_outlets)) {
        if (!db_table_exists('outlets')) {
            $_SESSION['outlet_id'] = $target_id;
        } else {
            $stmt = db()->prepare("SELECT id FROM outlets WHERE id = ? AND status = 'active'");
            $stmt->execute([$target_id]);
            if ($stmt->fetchColumn()) {
                $_SESSION['outlet_id'] = $target_id;
            }
        }
    }
    header("Location: index.php");
    exit;
}

// Timezone Setup
try {
    $tz_stmt = db()->prepare("SELECT value FROM settings WHERE `key` = 'timezone'");
    $tz_stmt->execute();
    $app_tz = $tz_stmt->fetchColumn();
    if ($app_tz && in_array($app_tz, DateTimeZone::listIdentifiers())) {
        date_default_timezone_set($app_tz);
    }
} catch (Exception $e) {
    // Ignore if DB not ready
}

require_once 'includes/DatabaseInstaller.php';

// Auto-install database if not installed, then ensure pending migrations are applied.
try {
    if (!DatabaseInstaller::isInstalled()) {
        DatabaseInstaller::install();
    } elseif (method_exists('DatabaseInstaller', 'ensureCurrentSchema')) {
        DatabaseInstaller::ensureCurrentSchema();
    } else {
        error_log('Skipping DatabaseInstaller::ensureCurrentSchema() because the loaded DatabaseInstaller class does not define it.');
    }
} catch (Throwable $e) {
    die("Installation Error: " . $e->getMessage());
}

require_once 'lib/LicenseService.php';
require_once 'includes/lang.php';

// Language Setup
if (isset($_GET['lang'])) {
    $_SESSION['lang'] = in_array($_GET['lang'], ['en', 'ar']) ? $_GET['lang'] : 'ar';
}
if (!isset($_SESSION['lang'])) {
    $_SESSION['lang'] = 'ar'; // Default to Arabic as requested
}
$lang = $_SESSION['lang'];
$dir = ($lang === 'ar') ? 'rtl' : 'ltr';

// Licensing Middleware
try {
    $is_activated = LicenseService::isActivated();
    $trial_days = LicenseService::getTrialRemainingDays();
    $can_access = LicenseService::canAccess();
} catch (PDOException $e) {
    die("Database Connection Error: " . $e->getMessage() . "<br><br>Please check your <b>db/config.php</b> settings.");
} catch (Exception $e) {
    die("Application Error: " . $e->getMessage());
}
$page = $_GET['page'] ?? 'dashboard';

if (!$can_access && $page !== 'activate') {
    header("Location: index.php?page=activate");
    exit;
}

// Activation Page UI (accessible without login)
if ($page === 'activate') {
    $error = '';
    $success = '';
    if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['activate'])) {
        $res = LicenseService::activate($_POST['license_key'] ?? '');
        if ($res['success']) {
            $success = "System activated successfully! Redirecting...";
            header("refresh:2;url=index.php");
        } else {
            $error = $res['error'];
        }
    }

    if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['start_trial'])) {
        // We need a way to call startTrial() which is private in LicenseService
        // I'll make it public or use a public wrapper
        $res = LicenseService::initTrial(); 
        if ($res['success']) {
            $success = "Trial period started! Redirecting...";
            header("refresh:2;url=index.php");
        } else {
            $error = $res['error'];
        }
    }
    ?>
    <!DOCTYPE html>
    <html lang="<?= $lang ?>" dir="<?= $dir ?>">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title><?= __('activate_product') ?></title>
        <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap<?= $dir === 'rtl' ? '.rtl' : '' ?>.min.css" rel="stylesheet">
        <style>
            body { background: #f4f7f6; height: 100vh; display: flex; align-items: center; justify-content: center; font-family: 'Inter', sans-serif; }
            .activation-card { background: white; padding: 2rem; border-radius: 1rem; box-shadow: 0 10px 25px rgba(0,0,0,0.05); width: 100%; max-width: 450px; }
            .fingerprint { background: #eee; padding: 0.5rem; border-radius: 0.5rem; font-family: monospace; font-size: 0.8rem; word-break: break-all; }
            [dir="rtl"] { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
        </style>
    </head>
    <body>
        <div class="activation-card">
            <div class="d-flex justify-content-between align-items-center mb-3">
                <h3 class="fw-bold mb-0"><?= __('activate_product') ?></h3>
                <div class="dropdown">
                    <button class="btn btn-sm btn-outline-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown">
                        <?= $lang === 'ar' ? 'العربية' : 'English' ?>
                    </button>
                    <ul class="dropdown-menu">
                        <li><a class="dropdown-menu" href="?page=activate&lang=en">English</a></li>
                        <li><a class="dropdown-menu" href="?page=activate&lang=ar">العربية</a></li>
                    </ul>
                </div>
            </div>
            <p class="text-muted small mb-4"><?= $lang === 'ar' ? 'يرجى إدخال مفتاح التسلسل للمتابعة.' : 'Please enter your serial key to continue using the application.' ?></p>
            
            <?php if ($error): ?>
                <div class="alert alert-danger small"><?= $error ?></div>
            <?php endif; ?>
            <?php if ($success): ?>
                <div class="alert alert-success small"><?= $success ?></div>
            <?php endif; ?>

            <form method="POST">
                <div class="mb-3">
                    <label class="form-label small fw-bold"><?= __('serial_key') ?></label>
                    <input type="text" name="license_key" class="form-control" placeholder="FLAT-XXXX-XXXX-XXXX" required>
                </div>
                <div class="mb-3">
                    <label class="form-label small fw-bold text-muted"><?= $lang === 'ar' ? 'بصمة السيرفر' : 'Server Fingerprint' ?></label>
                    <div class="fingerprint text-muted"><?= LicenseService::getFingerprint() ?></div>
                </div>
                <button type="submit" name="activate" class="btn btn-primary w-100 py-2 mb-3"><?= __('activate_now') ?></button>
            </form>

            <?php if (!$is_activated && $trial_days <= 0): ?>
                <div class="text-center">
                    <hr>
                    <p class="text-muted small"><?= $lang === 'ar' ? 'أو ابدأ الفترة التجريبية (15 يوم)' : 'Or start your 15-day trial period' ?></p>
                    <form method="POST">
                        <button type="submit" name="start_trial" class="btn btn-outline-secondary w-100 py-2"><?= $lang === 'ar' ? 'بدء الفترة التجريبية' : 'Start Free Trial' ?></button>
                    </form>
                </div>
            <?php endif; ?>
        </div>
        <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
    </body>
    </html>
    <?php
    exit;
}

require_once 'includes/accounting_helper.php';

// Helper to check permissions
function can(string $permission): bool {
    if (($_SESSION["user_id"] ?? 0) == 1) return true;
    if (strcasecmp($_SESSION["user_role_name"] ?? "", "Administrator") === 0) return true;
    if (!isset($_SESSION['user_id'])) return false;
    if (($_SESSION['user_role_name'] ?? '') === 'Administrator') return true;
    $user_perms = $_SESSION['user_permissions'] ?? [];
    if ($user_perms === 'all') return true;
    if (is_array($user_perms)) {
        return in_array('all', $user_perms) || in_array($permission, $user_perms);
    }
    $perms = json_decode((string)$user_perms, true);
    return is_array($perms) && (in_array('all', $perms) || in_array($permission, $perms));
}

function getPurchaseAlerts() {
    if (!can('dashboard_view') || !db_table_exists('purchases')) return [];

    $db = db();
    $hasSupplierJoin = db_table_exists('suppliers') && db_column_exists('purchases', 'supplier_id');
    $dueDateExpression = db_column_exists('purchases', 'due_date') ? 'p.due_date' : 'NULL';
    $statusPredicate = db_column_exists('purchases', 'status') ? "WHERE p.status != 'paid'" : 'WHERE 1=1';
    $dueDatePredicate = db_column_exists('purchases', 'due_date')
        ? ' AND p.due_date IS NOT NULL AND p.due_date <= DATE_ADD(CURDATE(), INTERVAL 7 DAY)'
        : '';
    $totalExpression = db_column_exists('purchases', 'total_with_vat')
        ? 'p.total_with_vat'
        : (db_column_exists('purchases', 'total_amount') ? 'COALESCE(p.total_amount, 0)' : '0');
    $supplierExpression = $hasSupplierJoin ? 's.name' : 'NULL';
    $joinClause = $hasSupplierJoin ? ' LEFT JOIN suppliers s ON p.supplier_id = s.id' : '';
    $orderBy = db_column_exists('purchases', 'due_date') ? ' ORDER BY p.due_date ASC' : ' ORDER BY p.id DESC';

    $sql = "SELECT p.id, {$dueDateExpression} AS due_date, {$totalExpression} AS total_with_vat, {$supplierExpression} AS supplier_name"
         . ' FROM purchases p'
         . $joinClause
         . ' '
         . $statusPredicate
         . $dueDatePredicate
         . $orderBy;

    $stmt = $db->query($sql);
    return $stmt->fetchAll(PDO::FETCH_ASSOC);
}

// Missing helper functions
function getLoyaltyMultiplier($tier) {
    switch (strtolower((string)$tier)) {
        case 'gold': return 2.0;
        case 'silver': return 1.5;
        default: return 1.0;
    }
}

function numberToWords($num) {
    $num = (int)$num;
    if ($num == 0) return "zero";
    $ones = ["", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"];
    $tens = ["", "", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"];
    if ($num < 20) return $ones[$num];
    if ($num < 100) return $tens[(int)($num / 10)] . ($num % 10 ? "-" . $ones[$num % 10] : "");
    if ($num < 1000) return $ones[(int)($num / 100)] . " hundred" . ($num % 100 ? " and " . numberToWords($num % 100) : "");
    if ($num < 1000000) return numberToWords((int)($num / 1000)) . " thousand" . ($num % 1000 ? " " . numberToWords($num % 1000) : "");
    return (string)$num;
}

function numberToWordsArabic($num) {
    $num = (int)$num;
    if ($num == 0) return "صفر";
    $ones = ["", "واحد", "اثنان", "ثلاثة", "أربعة", "خمسة", "ستة", "سبعة", "ثمانية", "تسعة", "عشرة", "أحد عشر", "اثنا عشر", "ثلاثة عشر", "أربعة عشر", "خمسة عشر", "ستة عشر", "سبعة عشر", "ثمانية عشر", "تسعة عشر"];
    $tens = ["", "", "عشرون", "ثلاثون", "أربعون", "خمسون", "ستون", "سبعون", "ثمانون", "تسعون"];
    $hundreds = ["", "مائة", "مائتان", "ثلاثمائة", "أربعمائة", "خمسمائة", "ستمائة", "سبعمائة", "ثمانمائة", "تسعمائة"];
    
    if ($num < 20) return $ones[$num];
    if ($num < 100) return ($num % 10 ? $ones[$num % 10] . " و " : "") . $tens[(int)($num / 10)];
    if ($num < 1000) return $hundreds[(int)($num / 100)] . ($num % 100 ? " و " . numberToWordsArabic($num % 100) : "");
    if ($num < 1000000) {
        $thousands = (int)($num / 1000);
        $rem = $num % 1000;
        $tStr = "ألف";
        if ($thousands == 1) $tStr = "ألف";
        else if ($thousands == 2) $tStr = "ألفين";
        else if ($thousands >= 3 && $thousands <= 10) $tStr = numberToWordsArabic($thousands) . " آلاف";
        else $tStr = numberToWordsArabic($thousands) . " ألف";
        
        return $tStr . ($rem ? " و " . numberToWordsArabic($rem) : "");
    }
    return (string)$num;
}

function renderPagination($currentPage, $totalPages) {
    $query = $_GET;
    unset($query['p']);
    $url = 'index.php?' . http_build_query($query) . '&p=';
    
    $limit = isset($_GET['limit']) ? (int)$_GET['limit'] : 20;
    $limitHtml = "
    <div class='d-flex justify-content-end align-items-center mb-2'>
        <label class='me-2 small text-muted' data-en='Rows per page:' data-ar='الصفوف لكل صفحة:'>Rows per page:</label>
        <select class='form-select form-select-sm w-auto' onchange='window.location.href=this.value'>
            <option value='index.php?" . http_build_query(array_merge($_GET, ['limit' => 5, 'p' => 1])) . "' " . ($limit == 5 ? 'selected' : '') . ">5</option>
            <option value='index.php?" . http_build_query(array_merge($_GET, ['limit' => 20, 'p' => 1])) . "' " . ($limit == 20 ? 'selected' : '') . ">20</option>
            <option value='index.php?" . http_build_query(array_merge($_GET, ['limit' => 40, 'p' => 1])) . "' " . ($limit == 40 ? 'selected' : '') . ">40</option>
            <option value='index.php?" . http_build_query(array_merge($_GET, ['limit' => 100, 'p' => 1])) . "' " . ($limit == 100 ? 'selected' : '') . ">100</option>
            <option value='index.php?" . http_build_query(array_merge($_GET, ['limit' => 200, 'p' => 1])) . "' " . ($limit == 200 ? 'selected' : '') . ">200</option>
            <option value='index.php?" . http_build_query(array_merge($_GET, ['limit' => 500, 'p' => 1])) . "' " . ($limit == 500 ? 'selected' : '') . ">500</option>
        </select>
    </div>
    <script>
    document.addEventListener('DOMContentLoaded', function() {
        let scriptTag = document.currentScript;
        if(scriptTag) {
            let container = scriptTag.parentElement;
            let grid = container.previousElementSibling;
            if (grid && grid.classList.contains('table-responsive')) {
                grid.parentNode.insertBefore(container.querySelector('.d-flex'), grid);
            }
        }
    });
    </script>
    ";

    if ($totalPages <= 1) return $limitHtml;
    
    $html = '<nav aria-label="Page navigation" class="mt-4"><ul class="pagination justify-content-center">';
    
    // Previous
    $disabled = ($currentPage <= 1) ? 'disabled' : '';
    $html .= '<li class="page-item ' . $disabled . '"><a class="page-link" href="' . $url . ($currentPage - 1) . '"><i class="bi bi-chevron-left"></i></a></li>';
    
    // Pages
    $start = max(1, $currentPage - 2);
    $end = min($totalPages, $currentPage + 2);
    
    if ($start > 1) {
        $html .= '<li class="page-item"><a class="page-link" href="' . $url . '1">1</a></li>';
        if ($start > 2) $html .= '<li class="page-item disabled"><span class="page-link">...</span></li>';
    }
    
    for ($i = $start; $i <= $end; $i++) {
        $active = ($i == $currentPage) ? 'active' : '';
        $html .= '<li class="page-item ' . $active . '"><a class="page-link" href="' . $url . $i . '">' . $i . '</a></li>';
    }
    
    if ($end < $totalPages) {
        if ($end < $totalPages - 1) $html .= '<li class="page-item disabled"><span class="page-link">...</span></li>';
        $html .= '<li class="page-item"><a class="page-link" href="' . $url . $totalPages . '">' . $totalPages . '</a></li>';
    }
    
    // Next
    $disabled = ($currentPage >= $totalPages) ? 'disabled' : '';
    $html .= '<li class="page-item ' . $disabled . '"><a class="page-link" href="' . $url . ($currentPage + 1) . '"><i class="bi bi-chevron-right"></i></a></li>';
    
    $html .= '</ul></nav>';
    return $html;
}

// Login Logic
$login_error = '';
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['login'])) {
    $user = trim((string)($_POST['username'] ?? ''));
    $pass = (string)($_POST['password'] ?? '');

    try {
        $stmt = db()->prepare("SELECT u.*, g.name as role_name FROM users u LEFT JOIN role_groups g ON u.group_id = g.id WHERE u.username = ? AND u.status = 'active'");
        $stmt->execute([$user]);
        $u = $stmt->fetch();

        if ($u && password_verify($pass, (string)($u['password'] ?? ''))) {
            $_SESSION['user_id'] = $u['id'];
            $_SESSION['username'] = $u['username'];
            $_SESSION['user_role_name'] = $u['role_name'];

            $permissions = [];
            if (db_table_exists('role_permissions')) {
                $permStmt = db()->prepare("SELECT permission FROM role_permissions WHERE role_id = ?");
                $permStmt->execute([$u['group_id']]);
                $permissions = $permStmt->fetchAll(PDO::FETCH_COLUMN) ?: [];
            }
            $_SESSION['user_permissions'] = $permissions;

            $_SESSION['profile_pic'] = $u['profile_pic'] ?? null;
            $_SESSION['theme'] = $u['theme'] ?? 'default';

            $user_outlets = [];
            if (db_table_exists('user_outlets')) {
                $outletStmt = db()->prepare("SELECT outlet_id FROM user_outlets WHERE user_id = ?");
                $outletStmt->execute([$u['id']]);
                $user_outlets = $outletStmt->fetchAll(PDO::FETCH_COLUMN) ?: [];
            }

            if (empty($user_outlets)) {
                if (($u['role_name'] ?? '') === 'Administrator' && db_table_exists('outlets')) {
                    $allOutlets = db()->query("SELECT id FROM outlets WHERE status = 'active'")->fetchAll(PDO::FETCH_COLUMN);
                    $user_outlets = $allOutlets ?: [1];
                } else {
                    $user_outlets = [1];
                }
            }

            $user_outlets = array_values(array_unique(array_map('intval', $user_outlets)));
            if ($user_outlets === []) {
                $user_outlets = [1];
            }

            $_SESSION['user_outlets'] = $user_outlets;
            $_SESSION['outlet_id'] = $user_outlets[0];
            header("Location: index.php");
            exit;
        }

        $login_error = "Invalid username or password";
        $reason = (!$u) ? "User not found or inactive" : "Password mismatch";
        file_put_contents('login_debug.log', date('Y-m-d H:i:s') . " - Failed login for '$user'. Reason: $reason\n", FILE_APPEND);
    } catch (Throwable $e) {
        file_put_contents('login_debug.log', date('Y-m-d H:i:s') . " - Login exception for '$user': " . $e->getMessage() . "\n", FILE_APPEND);
        $login_error = $lang === 'ar'
            ? 'تعذر تسجيل الدخول مؤقتًا. يرجى تحديث الصفحة والمحاولة مرة أخرى.'
            : 'Sign-in is temporarily unavailable. Please refresh the page and try again.';
    }
}

// Logout
if (isset($_GET['action']) && $_GET['action'] === 'logout') {
    session_destroy();
    header("Location: index.php");
    exit;
}

// --- POS AJAX Handlers ---
if (isset($_GET['action']) || isset($_POST['action'])) {
    $action = $_GET['action'] ?? $_POST['action'] ?? '';
    
    if ($action === 'validate_discount') {
        header('Content-Type: application/json');
        $code = $_GET['code'] ?? '';
        $stmt = db()->prepare("SELECT * FROM discount_codes WHERE code = ? AND status = 'active' AND (expiry_date IS NULL OR expiry_date >= CURDATE())");
        $stmt->execute([$code]);
        $discount = $stmt->fetch(PDO::FETCH_ASSOC);
        if ($discount) {
            echo json_encode(['success' => true, 'discount' => $discount]);
        } else {
            echo json_encode(['success' => false, 'error' => 'Invalid or expired discount code']);
        }
        exit;
    }

    if ($action === 'search_items') {
        file_put_contents('search_debug.log', date('Y-m-d H:i:s') . " - search_items call: q=" . ($_GET['q'] ?? '') . "\n", FILE_APPEND);
        header('Content-Type: application/json');
        $q = $_GET['q'] ?? '';
        if (strlen($q) < 1) {
            echo json_encode([]);
            exit;
        }
        $searchTerm = "%$q%";
        $oid = current_outlet_id(); $stmt = db()->prepare("SELECT i.*, i.stock_quantity FROM stock_items i  WHERE (i.name_en LIKE ? OR i.name_ar LIKE ? OR i.sku LIKE ?) LIMIT 15");
        $stmt->execute([$searchTerm, $searchTerm, $searchTerm]);
        echo json_encode($stmt->fetchAll(PDO::FETCH_ASSOC));
        exit;
    }


    if ($action === 'pos_search_items') {
        $q = $_GET['q'] ?? '';
        $searchTerm = "%$q%";
        
        $oid = current_outlet_id();
        $sql = "SELECT * FROM stock_items WHERE outlet_id = ? AND (name_en LIKE ? OR name_ar LIKE ? OR sku LIKE ?) ORDER BY name_en ASC LIMIT 100";
        $products_raw = db()->prepare($sql);
        $products_raw->execute([$oid, $searchTerm, $searchTerm, $searchTerm]);
        while($p = $products_raw->fetch(PDO::FETCH_ASSOC)) {
            $p['original_price'] = (float)$p['sale_price'];
            $p['sale_price'] = getPromotionalPrice($p);
            
            // Render Card HTML
            ?>
            <div class="product-card" data-id="<?= $p['id'] ?>" data-name-en="<?= htmlspecialchars($p['name_en']) ?>" data-name-ar="<?= htmlspecialchars($p['name_ar']) ?>" data-price="<?= $p['sale_price'] ?>" data-sku="<?= htmlspecialchars($p['sku']) ?>" data-stock-quantity="<?= (float)$p['stock_quantity'] ?>" data-vat-rate="<?= $p['vat_rate'] ?>">
                <?php if ($p['image_path']): ?>
                    <img src="<?= htmlspecialchars($p['image_path']) ?>" alt="<?= htmlspecialchars($p['name_en']) ?>">
                <?php else: ?>
                    <div class="bg-light d-flex align-items-center justify-content-center rounded mb-2" style="height: 120px;">
                        <i class="bi bi-box-seam text-muted" style="font-size: 3rem;"></i>
                    </div>
                <?php endif; ?>
                <div class="mb-1 product-name" data-en="<?= htmlspecialchars($p['name_en']) ?>" data-ar="<?= htmlspecialchars($p['name_ar']) ?>">
                    <?php if(!empty($p['name_ar'])): ?>
                        <div><?= htmlspecialchars($p['name_ar']) ?></div>
                        <div class="small text-secondary" style="font-size: 0.75rem; line-height: 1.1;"><?= htmlspecialchars($p['name_en']) ?></div>
                    <?php else: ?>
                        <div><?= htmlspecialchars($p['name_en']) ?></div>
                    <?php endif; ?>
                </div>
                <div class="d-flex justify-content-between align-items-center mt-auto">
                    <div class="d-flex flex-column">
                        <?php if ($p['sale_price'] < $p['original_price']): ?>
                            <span class="text-muted smaller text-decoration-line-through">OMR <?= number_format($p['original_price'], 3) ?></span>
                        <?php endif; ?>
                        <span class="price text-primary fw-bold">OMR <?= number_format((float)$p['sale_price'], 3) ?></span>
                    </div>
                    <span class="badge bg-light text-dark small"><?= (float)$p['stock_quantity'] ?> left</span>
                </div>
            </div>
            <?php
        }
        exit;
    }

    if ($action === 'pos_get_item_by_sku') {
        header('Content-Type: application/json');
        $sku = trim((string)($_GET['sku'] ?? ''));
        if ($sku === '') { echo json_encode(null); exit; }

        $weightBarcode = parseWeightBarcode($sku);
        $lookupSku = $weightBarcode['item_code'] ?? $sku;

        $oid = current_outlet_id();
        $stmt = db()->prepare("SELECT * FROM stock_items WHERE sku = ? AND outlet_id = ? LIMIT 1");
        $stmt->execute([$lookupSku, $oid]);
        $p = $stmt->fetch(PDO::FETCH_ASSOC);

        if ($p) {
            $p['original_price'] = (float)$p['sale_price'];
            $p['sale_price'] = getPromotionalPrice($p);
            $p['price'] = (float)$p['sale_price'];
            $p['nameEn'] = $p['name_en'];
            $p['nameAr'] = $p['name_ar'];
            $p['vatRate'] = $p['vat_rate'];

            if ($weightBarcode) {
                $qty = 0.0;
                if ($weightBarcode['mode'] === 'price') {
                    if ((float)$p['sale_price'] <= 0) {
                        echo json_encode(['error' => 'This item cannot use price-based scale barcodes because its sale price is zero.']);
                        exit;
                    }
                    $qty = round(((float)$weightBarcode['value']) / (float)$p['sale_price'], 3);
                } else {
                    $qty = round((float)$weightBarcode['value'], 3);
                }

                if ($qty <= 0) {
                    echo json_encode(['error' => 'The weighing scale barcode value is invalid.']);
                    exit;
                }

                $p['qty'] = $qty;
                $p['is_scale_barcode'] = true;
                $p['scale_barcode_mode'] = $weightBarcode['mode'];
                $p['scale_barcode_value'] = (float)$weightBarcode['value'];
                $p['scanned_barcode'] = $sku;
            }

            echo json_encode($p);
        } else {
            echo json_encode(null);
        }
        exit;
    }


    if ($action === 'get_payments') {
        header('Content-Type: application/json');
        $invoice_id = (int)$_GET['invoice_id'];
        $stmt = db()->prepare("SELECT * FROM payments WHERE invoice_id = ? ORDER BY payment_date DESC");
        $stmt->execute([$invoice_id]);
        echo json_encode($stmt->fetchAll(PDO::FETCH_ASSOC));
        exit;
    }

    if ($action === 'get_payment_details') {
        header('Content-Type: application/json');
        $payment_id = (int)$_GET['payment_id'];
        $stmt = db()->prepare("SELECT p.*, i.customer_id, c.name as customer_name, o.name as outlet_name 
                               FROM payments p 
                               JOIN invoices i ON p.invoice_id = i.id 
                               JOIN customers c ON i.customer_id = c.id 
                               LEFT JOIN outlets o ON i.outlet_id = o.id
                               WHERE p.id = ?");
        $stmt->execute([$payment_id]);
        echo json_encode($stmt->fetch(PDO::FETCH_ASSOC));
        exit;
    }

    if ($action === 'get_held_carts') {
        header('Content-Type: application/json');
        $stmt = db()->query("SELECT h.*, c.name as customer_name FROM pos_held_carts h LEFT JOIN customers c ON h.customer_id = c.id ORDER BY h.created_at DESC");
        echo json_encode($stmt->fetchAll(PDO::FETCH_ASSOC));
        exit;
    }

    if ($action === 'hold_pos_cart') {
        header('Content-Type: application/json');
        $name = $_POST['cart_name'] ?? 'Untitled Cart';
        $items = $_POST['items'] ?? '[]';
        $customer_id = !empty($_POST['customer_id']) ? (int)$_POST['customer_id'] : null;
        $stmt = db()->prepare("INSERT INTO pos_held_carts (cart_name, items_json, customer_id) VALUES (?, ?, ?)");
        $stmt->execute([$name, $items, $customer_id]);
        echo json_encode(['success' => true]);
        exit;
    }

    if ($action === 'delete_held_cart') {
        header('Content-Type: application/json');
        $id = (int)$_POST['id'];
        $stmt = db()->prepare("DELETE FROM pos_held_carts WHERE id = ?");
        $stmt->execute([$id]);
        echo json_encode(['success' => true]);
        exit;
    }

    if ($action === 'save_pos_transaction') {
        header('Content-Type: application/json');
        $db = db();
        try {
            $db->beginTransaction();
            
            $customer_id = !empty($_POST['customer_id']) ? (int)$_POST['customer_id'] : null;
            $payments = json_decode($_POST['payments'] ?? '[]', true);
            $items = json_decode($_POST['items'] ?? '[]', true);
            $total_amount = (float)($_POST['total_amount'] ?? 0);
            $tax_amount = (float)($_POST['tax_amount'] ?? 0);
            $discount_code_id = !empty($_POST['discount_code_id']) ? (int)$_POST['discount_code_id'] : null;
            $discount_amount = (float)($_POST['discount_amount'] ?? 0);
            $loyalty_redeemed = (float)($_POST['loyalty_redeemed'] ?? 0);
            $net_amount = $total_amount - $discount_amount - $loyalty_redeemed;
            
            $transaction_no = 'POS-' . time() . rand(10, 99);
            $session_id = $_SESSION['register_session_id'] ?? null;
            
            if (!$session_id) {
                // Fallback: try to find an open session for this user
                $check_session = $db->prepare("SELECT id FROM register_sessions WHERE user_id = ? AND status = 'open' LIMIT 1");
                $check_session->execute([$_SESSION['user_id']]);
                $session_id = $check_session->fetchColumn() ?: null;
                if ($session_id) {
                    $_SESSION['register_session_id'] = $session_id;
                }
            }
            
            // Insert into unified Invoice table
            $items_for_journal = [];
            foreach ($items as $item) {
                $items_for_journal[] = ['id' => $item['id'], 'qty' => $item['qty']];
            }

            $outlet_id = current_outlet_id();
            if ($outlet_id == -1) $outlet_id = 1; // Default to main branch if All Outlets selected

            $stmt = $db->prepare("INSERT INTO invoices (transaction_no, customer_id, invoice_date, payment_type, total_amount, vat_amount, total_with_vat, paid_amount, status, register_session_id, is_pos, discount_amount, loyalty_points_redeemed, created_by, outlet_id) VALUES (?, ?, ?, ?, ?, ?, ?, ?, 'paid', ?, 1, ?, ?, ?, ?)");
            $stmt->execute([$transaction_no, $customer_id, date('Y-m-d'), 'pos', $total_amount, $tax_amount, $net_amount, $net_amount, $session_id, $discount_amount, $loyalty_redeemed, $_SESSION['user_id'], $outlet_id]);
            $transaction_id = (int)$db->lastInsertId();
            
            // Insert Items & Update Stock
            $stmtItem = $db->prepare("INSERT INTO invoice_items (invoice_id, item_id, quantity, unit_price, vat_amount, total_price) VALUES (?, ?, ?, ?, ?, ?)");
            // $stmtStock = $db->prepare("UPDATE stock_items SET stock_quantity = stock_quantity - ? WHERE id = ?");
            
            foreach ($items as $item) {
                $sub = (float)$item['price'] * (float)$item['qty'];
                $va = (float)($item['vat_amount'] ?? 0);
                $stmtItem->execute([$transaction_id, $item['id'], $item['qty'], $item['price'], $va, $sub]);
                update_stock($item['id'], -$item['qty'], $outlet_id);
            }
            
            // Insert Payments
            require_once 'includes/accounting_helper.php';
            $stmtPay = $db->prepare("INSERT INTO payments (invoice_id, amount, payment_date, payment_method, notes) VALUES (?, ?, ?, ?, ?)");
            foreach ($payments as $p) {
                $stmtPay->execute([$transaction_id, $p['amount'], date('Y-m-d'), $p['method'], 'POS Transaction']);
                $payment_id = $db->lastInsertId();
                recordPaymentReceivedJournal((int)$payment_id, $p['amount'], date('Y-m-d'), $p['method']);
            }
            
            // Update Loyalty Points if customer exists
            if ($customer_id) {
                // Earn points
                $points_earned = floor($net_amount); 
                $stmtPoints = $db->prepare("UPDATE customers SET loyalty_points = loyalty_points - ? + ? WHERE id = ?");
                $stmtPoints->execute([$loyalty_redeemed * 100, $points_earned, $customer_id]);
                
                // Record transactions
                if ($points_earned > 0) {
                    $db->prepare("INSERT INTO loyalty_transactions (customer_id, transaction_id, points_change, transaction_type, description) VALUES (?, ?, ?, 'earned', ?)")
                       ->execute([$customer_id, $transaction_id, $points_earned, "Earned from POS order #$transaction_no"]);
                }
                if ($loyalty_redeemed > 0) {
                    $db->prepare("INSERT INTO loyalty_transactions (customer_id, transaction_id, points_change, transaction_type, description) VALUES (?, ?, ?, 'redeemed', ?)")
                       ->execute([$customer_id, $transaction_id, -$loyalty_redeemed * 100, "Redeemed for POS order #$transaction_no"]);
                }

                // Update invoice with points earned
                $db->prepare("UPDATE invoices SET loyalty_points_earned = ? WHERE id = ?")->execute([$points_earned, $transaction_id]);
            }
            
            // Record Sale Journal for POS
            recordSaleJournal($transaction_id, $net_amount, date('Y-m-d'), $items_for_journal, $tax_amount);
            
            $db->commit();
            echo json_encode(['success' => true, 'invoice_id' => $transaction_id, 'transaction_no' => $transaction_no]);
        } catch (Exception $e) {
            $db->rollBack();
            echo json_encode(['success' => false, 'error' => $e->getMessage()]);
        }
        exit;
    }

    if ($action === 'save_theme') {
        header('Content-Type: application/json');
        if (!isset($_SESSION['user_id'])) {
            echo json_encode(['success' => false, 'error' => 'Not authenticated']);
            exit;
        }
        $theme = $_POST['theme'] ?? 'default';
        $allowed = ['default', 'dark', 'ocean', 'forest', 'sunset', 'nord', 'dracula', 'citrus'];
        if (!in_array($theme, $allowed)) $theme = 'default';
        
        $stmt = db()->prepare("UPDATE users SET theme = ? WHERE id = ?");
        $stmt->execute([$theme, $_SESSION['user_id']]);
        $_SESSION['theme'] = $theme;
        echo json_encode(['success' => true]);
        exit;
    }

    if ($action === 'get_invoice_items') {
        header('Content-Type: application/json');
        $invoice_id = (int)$_GET['invoice_id'];
        $type = $_GET['type'] ?? 'sale';
        
        if ($type === 'purchase') {
            $stmt = db()->prepare("SELECT pi.*, i.name_en, i.name_ar, i.sku 
                                   FROM purchase_items pi 
                                   JOIN stock_items i ON pi.item_id = i.id 
                                   WHERE pi.purchase_id = ?");
        } else {
            $stmt = db()->prepare("SELECT ii.*, i.name_en, i.name_ar, i.sku 
                                   FROM invoice_items ii 
                                   JOIN stock_items i ON ii.item_id = i.id 
                                   WHERE ii.invoice_id = ?");
        }
        $stmt->execute([$invoice_id]);
        echo json_encode($stmt->fetchAll(PDO::FETCH_ASSOC));
        exit;
    }

    if ($action === 'get_return_details') {
        header('Content-Type: application/json');
        $return_id = (int)$_GET['return_id'];
        $type = $_GET['type'] ?? 'sale';
        
        if ($type === 'purchase') {
            $purchaseReturnReferenceColumn = purchase_return_reference_column();
            $stmt = db()->prepare("SELECT pr.*, pr.`{$purchaseReturnReferenceColumn}` AS purchase_id, c.name as party_name FROM purchase_returns pr LEFT JOIN suppliers c ON pr.supplier_id = c.id WHERE pr.id = ?");
            $stmt->execute([$return_id]);
            $return = $stmt->fetch(PDO::FETCH_ASSOC);
            if ($return) {
                $stmtItems = db()->prepare("SELECT pri.*, i.name_en, i.name_ar, i.sku FROM purchase_return_items pri JOIN stock_items i ON pri.item_id = i.id WHERE pri.return_id = ?");
                $stmtItems->execute([$return_id]);
                $return['items'] = $stmtItems->fetchAll(PDO::FETCH_ASSOC);
            }
        } else {
            $salesReturnReferenceColumn = sales_return_reference_column();
            $stmt = db()->prepare("SELECT sr.*, sr.`{$salesReturnReferenceColumn}` AS invoice_id, c.name as party_name FROM sales_returns sr LEFT JOIN customers c ON sr.customer_id = c.id WHERE sr.id = ?");
            $stmt->execute([$return_id]);
            $return = $stmt->fetch(PDO::FETCH_ASSOC);
            if ($return) {
                $stmtItems = db()->prepare("SELECT sri.*, i.name_en, i.name_ar, i.sku FROM sales_return_items sri JOIN stock_items i ON sri.item_id = i.id WHERE sri.return_id = ?");
                $stmtItems->execute([$return_id]);
                $return['items'] = $stmtItems->fetchAll(PDO::FETCH_ASSOC);
            }
        }
        echo json_encode($return);
        exit;
    }

    if ($action === 'translate') {
        header('Content-Type: application/json');
        require_once __DIR__ . '/includes/translation_helper.php';

        $text = trim((string) ($_POST['text'] ?? ''));
        $target = strtolower(trim((string) ($_POST['target'] ?? ''))) === 'en' ? 'en' : 'ar';

        if ($text === '') {
            echo json_encode(['success' => false, 'error' => 'No text provided'], JSON_UNESCAPED_UNICODE);
            exit;
        }

        $translationResult = app_translate_text($text, $target);
        if (!empty($translationResult['success']) && !empty($translationResult['translated'])) {
            echo json_encode([
                'success' => true,
                'translated' => $translationResult['translated'],
                'provider' => $translationResult['provider'] ?? 'unknown',
            ], JSON_UNESCAPED_UNICODE);
        } else {
            $errorMessage = (string) ($translationResult['error'] ?? 'Translation failed');
            error_log("Translation failed for text '$text': " . json_encode($translationResult, JSON_UNESCAPED_UNICODE));
            echo json_encode(['success' => false, 'error' => $errorMessage], JSON_UNESCAPED_UNICODE);
        }
        exit;
    }
}

// Redirect to login if not authenticated
if (!isset($_SESSION['user_id'])) {
    ?>
    <!DOCTYPE html>
    <html lang="<?= $lang ?>" dir="<?= $dir ?>">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title><?= __('sign_in') ?> - Admin Panel</title>
        <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap<?= $dir === 'rtl' ? '.rtl' : '' ?>.min.css" rel="stylesheet">
        <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
        <style>
            body { background: #f8f9fa; height: 100vh; display: flex; align-items: center; justify-content: center; font-family: 'Inter', sans-serif; }
            .login-card { border: none; border-radius: 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.05); width: 100%; max-width: 400px; padding: 40px; background: #fff; }
            .btn-primary { border-radius: 12px; padding: 12px; font-weight: 600; background: linear-gradient(135deg, #6e8efb, #a777e3); border: none; }
            .form-control { border-radius: 12px; padding: 12px; border: 1px solid #eee; }
            .form-control:focus { box-shadow: 0 0 0 4px rgba(110, 142, 251, 0.1); border-color: #6e8efb; }
            [dir="rtl"] { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
        </style>
    </head>
    <body>
        <div class="login-card text-center">
            <div class="d-flex justify-content-end mb-3">
                <a href="?lang=<?= $lang === 'ar' ? 'en' : 'ar' ?>" class="btn btn-sm btn-light border">
                    <?= $lang === 'ar' ? 'English' : 'العربية' ?>
                </a>
            </div>
            <div class="mb-4">
                <div class="d-inline-flex align-items-center justify-content-center bg-primary bg-opacity-10 rounded-circle mb-3" style="width: 60px; height: 60px;">
                    <i class="bi bi-shield-lock text-primary fs-3"></i>
                </div>
                <h4 class="fw-bold"><?= __('welcome_back') ?></h4>
                <p class="text-muted small"><?= $lang === 'ar' ? 'يرجى إدخال تفاصيلك لتسجيل الدخول' : 'Please enter your details to sign in' ?></p>
            </div>
            <?php if ($login_error): ?>
                <div class="alert alert-danger small py-2 mb-4"><?= $login_error ?></div>
            <?php endif; ?>
            <form method="POST">
                <div class="mb-3 text-start">
                    <label class="form-label small fw-semibold"><?= __('username') ?></label>
                    <input type="text" name="username" class="form-control" placeholder="<?= $lang === 'ar' ? 'اسم المستخدم' : 'Username' ?>" required autofocus>
                </div>
                <div class="mb-4 text-start">
                    <label class="form-label small fw-semibold"><?= __('password') ?></label>
                    <input type="password" name="password" class="form-control" placeholder="<?= $lang === 'ar' ? 'كلمة المرور' : 'Password' ?>" required>
                </div>
                <button type="submit" name="login" class="btn btn-primary w-100 mb-3"><?= __('sign_in') ?></button>
            </form>
        </div>
        <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
    </body>
    </html>
    <?php
    exit;
}

// Handle POST Requests
$message = $_SESSION['message'] ?? '';
unset($_SESSION['message']);

function getSettingValue(string $key, ?string $default = null): ?string {
    static $cache = [];
    if (array_key_exists($key, $cache)) return $cache[$key];
    try {
        $stmt = db()->prepare("SELECT value FROM settings WHERE `key` = ? LIMIT 1");
        $stmt->execute([$key]);
        $value = $stmt->fetchColumn();
    } catch (Throwable $e) {
        $value = false;
    }
    if ($value === false || $value === null || $value === '') $value = $default;
    $cache[$key] = $value;
    return $value;
}

function getWeightBarcodeConfig(): array {
    $prefixStart = (int)(getSettingValue('weight_barcode_prefix_start', '20') ?? '20');
    $prefixEnd = (int)(getSettingValue('weight_barcode_prefix_end', '29') ?? '29');
    if ($prefixStart < 20 || $prefixStart > 29) $prefixStart = 20;
    if ($prefixEnd < 20 || $prefixEnd > 29) $prefixEnd = 29;
    if ($prefixStart > $prefixEnd) {
        [$prefixStart, $prefixEnd] = [$prefixEnd, $prefixStart];
    }
    $mode = strtolower((string)(getSettingValue('weight_barcode_mode', 'weight') ?? 'weight'));
    if (!in_array($mode, ['weight', 'price'], true)) $mode = 'weight';
    return [
        'prefix_start' => $prefixStart,
        'prefix_end' => $prefixEnd,
        'mode' => $mode,
        'value_divisor' => 1000,
    ];
}

function isWeightBarcode(string $barcode): bool {
    $barcode = trim($barcode);
    if (!preg_match('/^\d{13}$/', $barcode)) return false;
    $config = getWeightBarcodeConfig();
    $prefix = (int)substr($barcode, 0, 2);
    return $prefix >= $config['prefix_start'] && $prefix <= $config['prefix_end'];
}

function parseWeightBarcode(string $barcode): ?array {
    $barcode = trim($barcode);
    if (!isWeightBarcode($barcode)) return null;
    $config = getWeightBarcodeConfig();
    $rawValue = (int)substr($barcode, 7, 5);
    return [
        'full_barcode' => $barcode,
        'prefix' => substr($barcode, 0, 2),
        'item_code' => substr($barcode, 2, 5),
        'raw_value' => $rawValue,
        'value' => $rawValue / (float)$config['value_divisor'],
        'mode' => $config['mode'],
        'check_digit' => substr($barcode, 12, 1),
    ];
}

function validateItemSkuBarcode(string $sku): ?string {
    $sku = trim($sku);
    if ($sku === '') return null;
    if (!isWeightBarcode($sku)) return null;
    $config = getWeightBarcodeConfig();
    return "This barcode is reserved for weighing scale scans. 13-digit barcodes starting with {$config['prefix_start']}-{$config['prefix_end']} cannot be saved as item barcodes; please save the 5-digit scale item code instead.";
}

function redirectWithMessage($msg, $url = null) {
    if (!$url) {
        $url = $_SERVER['REQUEST_URI'];
    }
    $_SESSION['message'] = $msg;
    header("Location: $url");
    exit;
}

// Fetch theme if not in session but user is logged in
if (isset($_SESSION['user_id']) && !isset($_SESSION['theme'])) {
    $stmt = db()->prepare("SELECT theme FROM users WHERE id = ?");
    $stmt->execute([$_SESSION['user_id']]);
    $_SESSION['theme'] = $stmt->fetchColumn() ?: 'default';
}

function numberToWordsOMR($number) {
    $number = number_format((float)$number, 3, '.', '');
    list($rials, $baisas) = explode('.', $number);
    
    $rialsWordsEn = numberToWords((int)$rials);
    $baisasWordsEn = numberToWords((int)$baisas);
    
    $enResult = $rialsWordsEn . " Omani Rials";
    if ((int)$baisas > 0) {
        $enResult .= " and " . $baisasWordsEn . " Baisas";
    }
    $enResult .= " Only";

    $rialsWordsAr = numberToWordsArabic((int)$rials);
    $baisasWordsAr = numberToWordsArabic((int)$baisas);
    
    $arResult = $rialsWordsAr . " ريال عماني";
    if ((int)$baisas > 0) {
        $arResult .= " و " . $baisasWordsAr . " بيسة";
    }
    $arResult .= " فقط";

    return $enResult . " / " . $arResult;
}

function getPromotionalPrice($item) {
    $price = (float)$item['sale_price'];
    if (isset($item['is_promotion']) && $item['is_promotion']) {
        $today = date('Y-m-d');
        $start = !empty($item['promotion_start']) ? $item['promotion_start'] : null;
        $end = !empty($item['promotion_end']) ? $item['promotion_end'] : null;
        
        $active = true;
        if ($start && $today < $start) $active = false;
        if ($end && $today > $end) $active = false;
        
        if ($active) {
            $price = $price * (1 - (float)$item['promotion_percent'] / 100);
        }
    }
    return $price;
}

// --- Inventory & Core Handlers ---
    if (isset($_POST['add_item'])) {
        $name_en = $_POST['name_en'] ?? '';
        $name_ar = $_POST['name_ar'] ?? '';
        $category_id = (int)$_POST['category_id'] ?: null;
        $unit_id = (int)$_POST['unit_id'] ?: null;
        $supplier_id = (int)$_POST['supplier_id'] ?: null;
        $sku = trim((string)($_POST['sku'] ?? ''));
        if ($sku_error = validateItemSkuBarcode($sku)) {
            redirectWithMessage($sku_error, 'index.php?page=items');
        }
        $sale_price = (float)($_POST['sale_price'] ?? 0);
        $purchase_price = (float)($_POST['purchase_price'] ?? 0);
        $stock_quantity = (float)($_POST['stock_quantity'] ?? 0);
        $min_stock_level = (float)($_POST['min_stock_level'] ?? 0);
        $vat_rate = (float)($_POST['vat_rate'] ?? 0);
        $expiry_date = !empty($_POST['expiry_date']) ? $_POST['expiry_date'] : null;
        $is_promotion = isset($_POST['is_promotion']) ? 1 : 0;
        $promotion_start = !empty($_POST['promotion_start']) ? $_POST['promotion_start'] : null;
        $promotion_end = !empty($_POST['promotion_end']) ? $_POST['promotion_end'] : null;
        $promotion_percent = (float)($_POST['promotion_percent'] ?? 0);

        $image_path = null;
        if (isset($_FILES['image']) && $_FILES['image']['error'] === 0) {
            $ext = pathinfo($_FILES['image']['name'], PATHINFO_EXTENSION);
            $filename = 'uploads/item_' . time() . '.' . $ext;
            if (!is_dir('uploads')) mkdir('uploads', 0777, true);
            if (move_uploaded_file($_FILES['image']['tmp_name'], $filename)) $image_path = $filename;
        }
        $current_oid = current_outlet_id();
        $stmt = db()->prepare("INSERT INTO stock_items (outlet_id, name_en, name_ar, category_id, unit_id, supplier_id, sku, sale_price, purchase_price, stock_quantity, min_stock_level, image_path, vat_rate, expiry_date, is_promotion, promotion_start, promotion_end, promotion_percent) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
        $stmt->execute([$current_oid, $name_en, $name_ar, $category_id, $unit_id, $supplier_id, $sku, $sale_price, $purchase_price, $stock_quantity, $min_stock_level, $image_path, $vat_rate, $expiry_date, $is_promotion, $promotion_start, $promotion_end, $promotion_percent]);
        $new_item_id = db()->lastInsertId();
        redirectWithMessage("Item added successfully!");
    }

    if (isset($_POST['edit_item'])) {
        $id = (int)$_POST['id'];
        $name_en = $_POST['name_en'] ?? '';
        $name_ar = $_POST['name_ar'] ?? '';
        $category_id = (int)$_POST['category_id'] ?: null;
        $unit_id = (int)$_POST['unit_id'] ?: null;
        $supplier_id = (int)$_POST['supplier_id'] ?: null;
        $sku = trim((string)($_POST['sku'] ?? ''));
        if ($sku_error = validateItemSkuBarcode($sku)) {
            redirectWithMessage($sku_error, 'index.php?page=items');
        }
        $sale_price = (float)($_POST['sale_price'] ?? 0);
        $purchase_price = (float)($_POST['purchase_price'] ?? 0);
        $stock_quantity = (float)($_POST['stock_quantity'] ?? 0);
        $min_stock_level = (float)($_POST['min_stock_level'] ?? 0);
        $vat_rate = (float)($_POST['vat_rate'] ?? 0);
        $expiry_date = !empty($_POST['expiry_date']) ? $_POST['expiry_date'] : null;
        $is_promotion = isset($_POST['is_promotion']) ? 1 : 0;
        $promotion_start = !empty($_POST['promotion_start']) ? $_POST['promotion_start'] : null;
        $promotion_end = !empty($_POST['promotion_end']) ? $_POST['promotion_end'] : null;
        $promotion_percent = (float)($_POST['promotion_percent'] ?? 0);
        // Update stock_items
        $stmt = db()->prepare("UPDATE stock_items SET name_en = ?, name_ar = ?, category_id = ?, unit_id = ?, supplier_id = ?, sku = ?, sale_price = ?, purchase_price = ?, stock_quantity = ?, min_stock_level = ?, vat_rate = ?, expiry_date = ?, is_promotion = ?, promotion_start = ?, promotion_end = ?, promotion_percent = ? WHERE id = ?");
        $stmt->execute([$name_en, $name_ar, $category_id, $unit_id, $supplier_id, $sku, $sale_price, $purchase_price, $stock_quantity, $min_stock_level, $vat_rate, $expiry_date, $is_promotion, $promotion_start, $promotion_end, $promotion_percent, $id]);
        if (isset($_FILES['image']) && $_FILES['image']['error'] === 0) {
            $ext = pathinfo($_FILES['image']['name'], PATHINFO_EXTENSION);
            $filename = 'uploads/item_' . $id . '_' . time() . '.' . $ext;
            if (move_uploaded_file($_FILES['image']['tmp_name'], $filename)) db()->prepare("UPDATE stock_items SET image_path = ? WHERE id = ?")->execute([$filename, $id]);
        }
        redirectWithMessage("Item updated successfully!");
    }

    if (isset($_POST['delete_item'])) {
        db()->prepare("DELETE FROM stock_items WHERE id = ?")->execute([(int)$_POST['id']]);
        redirectWithMessage("Item deleted successfully!");
    }

    if (isset($_POST['cancel_all_promotions'])) {
        db()->query("UPDATE stock_items SET is_promotion = 0 WHERE is_promotion = 1");
        redirectWithMessage("All active promotions have been cancelled.");
    }

    // Auto-expire finished promotions
    db()->query("UPDATE stock_items SET is_promotion = 0 WHERE is_promotion = 1 AND promotion_end IS NOT NULL AND promotion_end < '" . date('Y-m-d') . "'");

    if (isset($_POST['add_category'])) {
        $current_oid = current_outlet_id();
        db()->prepare("INSERT INTO stock_categories (name_en, name_ar, outlet_id) VALUES (?, ?, ?)")
            ->execute([$_POST['name_en'] ?? '', $_POST['name_ar'] ?? '', $current_oid]);
        redirectWithMessage("Category added!");
    }
    if (isset($_POST['add_unit'])) {
        $current_oid = current_outlet_id();
        $unitNameEn = trim((string)($_POST['name_en'] ?? ''));
        $unitNameAr = trim((string)($_POST['name_ar'] ?? ''));
        if ($unitNameAr === '') $unitNameAr = $unitNameEn;
        db()->prepare("INSERT INTO stock_units (name_en, name_ar, short_name_en, short_name_ar, outlet_id) VALUES (?, ?, ?, ?, ?)")
            ->execute([$unitNameEn, $unitNameAr, $unitNameEn, $unitNameAr, $current_oid]);
        redirectWithMessage("Unit added!");
    }

    if (isset($_POST['edit_category'])) {
        db()->prepare("UPDATE stock_categories SET name_en = ?, name_ar = ? WHERE id = ?")->execute([$_POST['name_en'] ?? '', $_POST['name_ar'] ?? '', (int)$_POST['id']]);
        redirectWithMessage("Category updated!");
    }
    if (isset($_POST['delete_category'])) {
        db()->prepare("DELETE FROM stock_categories WHERE id = ?")->execute([(int)$_POST['id']]);
        redirectWithMessage("Category deleted!");
    }
    if (isset($_POST['edit_unit'])) {
        $unitNameEn = trim((string)($_POST['name_en'] ?? ''));
        $unitNameAr = trim((string)($_POST['name_ar'] ?? ''));
        if ($unitNameAr === '') $unitNameAr = $unitNameEn;
        db()->prepare("UPDATE stock_units SET name_en = ?, name_ar = ?, short_name_en = ?, short_name_ar = ? WHERE id = ?")->execute([$unitNameEn, $unitNameAr, $unitNameEn, $unitNameAr, (int)$_POST['id']]);
        redirectWithMessage("Unit updated!");
    }
    if (isset($_POST['delete_unit'])) {
        db()->prepare("DELETE FROM stock_units WHERE id = ?")->execute([(int)$_POST['id']]);
        redirectWithMessage("Unit deleted!");
    }

    if (isset($_POST['add_customer'])) {
        $table = ($_POST['type'] ?? '') === 'supplier' ? 'suppliers' : 'customers';
        $taxColumn = entity_tax_column($table);
        $columns = ['name', 'email', 'phone'];
        $placeholders = ['?', '?', '?'];
        $params = [$_POST['name'] ?? '', $_POST['email'] ?? '', $_POST['phone'] ?? ''];

        if ($taxColumn !== null) {
            $columns[] = $taxColumn;
            $placeholders[] = '?';
            $params[] = $_POST['tax_id'] ?? '';
        }

        $columns[] = 'balance';
        $placeholders[] = '?';
        $params[] = (float)($_POST['balance'] ?? 0);

        if ($table === 'customers') {
            $columns[] = 'loyalty_points';
            $placeholders[] = '?';
            $params[] = 0;
        } else {
            $columns[] = 'outlet_id';
            $placeholders[] = '?';
            $params[] = current_outlet_id();
        }

        $sql = "INSERT INTO $table (" . implode(', ', $columns) . ") VALUES (" . implode(', ', $placeholders) . ")";
        db()->prepare($sql)->execute($params);
        redirectWithMessage("Entity added!");
    }
    if (isset($_POST['edit_customer'])) {
        $table = ($_POST['type'] ?? '') === 'supplier' ? 'suppliers' : 'customers';
        $taxColumn = entity_tax_column($table);
        $assignments = ['name = ?', 'email = ?', 'phone = ?'];
        $params = [$_POST['name'] ?? '', $_POST['email'] ?? '', $_POST['phone'] ?? ''];

        if ($taxColumn !== null) {
            $assignments[] = $taxColumn . ' = ?';
            $params[] = $_POST['tax_id'] ?? '';
        }

        $assignments[] = 'balance = ?';
        $params[] = (float)($_POST['balance'] ?? 0);
        $params[] = (int)$_POST['id'];

        $sql = "UPDATE $table SET " . implode(', ', $assignments) . " WHERE id = ?";
        db()->prepare($sql)->execute($params);
        redirectWithMessage("Entity updated!");
    }
    if (isset($_POST['delete_customer'])) {
        $table = ($_POST['type'] ?? '') === 'supplier' ? 'suppliers' : 'customers';
        db()->prepare("DELETE FROM $table WHERE id = ?")->execute([(int)$_POST['id']]);
        redirectWithMessage("Entity deleted!");
    }

    // Invoices
    if (isset($_POST['add_invoice'])) {
        $db = db();
        try {
            $db->beginTransaction();
            $type = $_POST['type'] ?? 'sale';
            $table = ($type === 'purchase') ? 'purchases' : 'invoices';
            $item_table = ($type === 'purchase') ? 'purchase_items' : 'invoice_items';
            $cust_supplier_col = ($type === 'purchase') ? 'supplier_id' : 'customer_id';
            $fk_col = ($type === 'purchase') ? 'purchase_id' : 'invoice_id';
            
            $cust_id = (int)$_POST['customer_id'];
            $inv_date = $_POST['invoice_date'] ?: date('Y-m-d');
            $due_date = $_POST['due_date'] ?: null;
            $status = $_POST['status'] ?? 'pending';
            $pay_type = $_POST['payment_type'] ?? 'cash';
            
            $items = $_POST['item_ids'] ?? [];
            if (empty($items)) {
                throw new Exception("Please add at least one item.");
            }
            $qtys = $_POST['quantities'] ?? [];
            $prices = $_POST['prices'] ?? [];
            
            $total_subtotal = 0;
            $total_vat = 0;
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                
                $vatAmount = $subtotal * ($vatRate / 100);
                $total_subtotal += $subtotal;
                $total_vat += $vatAmount;
            }
            
            $total_with_vat = $total_subtotal + $total_vat;
            $paid = (float)($_POST['paid_amount'] ?? 0);
            if ($status === 'paid') $paid = $total_with_vat;
            
            $stmt = $db->prepare("INSERT INTO $table ($cust_supplier_col, invoice_date, due_date, status, payment_type, total_amount, vat_amount, total_with_vat, paid_amount) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)");
            $stmt->execute([$cust_id, $inv_date, $due_date, $status, $pay_type, $total_subtotal, $total_vat, $total_with_vat, $paid]);
            $inv_id = $db->lastInsertId();
            
            $items_for_journal = [];
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                $vatAmount = $subtotal * ($vatRate / 100);

                $db->prepare("INSERT INTO $item_table ($fk_col, item_id, quantity, unit_price, vat_amount, total_price) VALUES (?, ?, ?, ?, ?, ?)")->execute([$inv_id, $item_id, $qty, $price, $vatAmount, $subtotal]);
                
                // Update stock
                $change = ($type === 'sale') ? -$qty : $qty;
                update_stock($item_id, $change);
                $items_for_journal[] = ['id' => $item_id, 'qty' => $qty];
            }
            
            // Accounting
            if ($type === 'sale') {
                recordSaleJournal($inv_id, $total_with_vat, $inv_date, $items_for_journal, $total_vat);
            } else {
                // For purchases, you might have recordPurchaseJournal, but let's check if it exists
                if (function_exists('recordPurchaseJournal')) {
                    recordPurchaseJournal($inv_id, $total_with_vat, $inv_date, $items_for_journal, $total_vat);
                }
            }

            $db->commit();
            $msg = ($type === 'purchase' ? "Purchase" : "Invoice") . " #$inv_id created!";
            redirectWithMessage($msg, "index.php?page=" . ($type === 'purchase' ? 'purchases' : 'sales'));
        } catch (Exception $e) { $db->rollBack(); $message = "Error: " . $e->getMessage(); }
    }

    if (isset($_POST["add_quotation"])) {
        $db = db();
        try {
            $db->beginTransaction();
            $cust_id = (int)$_POST["customer_id"];
            $quot_date = $_POST["quotation_date"] ?: date("Y-m-d");
            $valid_until = $_POST["valid_until"] ?: null;
            $status = $_POST["status"] ?? "pending";
            
            $items = $_POST["item_ids"] ?? [];
            $qtys = $_POST["quantities"] ?? [];
            $prices = $_POST["prices"] ?? [];
            
            $total_subtotal = 0;
            $total_vat = 0;
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                
                $vatAmount = $subtotal * ($vatRate / 100);
                $total_subtotal += $subtotal;
                $total_vat += $vatAmount;
            }
            
            $total_with_vat = $total_subtotal + $total_vat;
            
            [$quotationInsertSql, $quotationInsertValues] = db_insert_sql_for_existing_columns('quotations', [
                'customer_id' => $cust_id,
                'quotation_date' => $quot_date,
                'valid_until' => $valid_until,
                'status' => $status,
                'total_amount' => $total_subtotal,
                'vat_amount' => $total_vat,
                'total_with_vat' => $total_with_vat,
                'outlet_id' => current_outlet_id(),
            ]);
            $stmt = $db->prepare($quotationInsertSql);
            $stmt->execute($quotationInsertValues);
            $quot_id = $db->lastInsertId();
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                $vatAmount = $subtotal * ($vatRate / 100);
                $db->prepare("INSERT INTO quotation_items (quotation_id, item_id, quantity, unit_price, total_price) VALUES (?, ?, ?, ?, ?)")->execute([$quot_id, $item_id, $qty, $price, $subtotal]);
            }
            $db->commit();
            $msg = "Quotation #$quot_id created!";
            redirectWithMessage($msg, "index.php?page=quotations");
        } catch (Exception $e) { $db->rollBack(); $message = "Error: " . $e->getMessage(); }
    }

    if (isset($_POST['edit_quotation'])) {
        $db = db();
        try {
            $db->beginTransaction();
            $quot_id = (int)$_POST['quotation_id'];
            $cust_id = (int)$_POST['customer_id'];
            $quot_date = $_POST['quotation_date'];
            $valid_until = $_POST['valid_until'] ?: null;
            $status = $_POST['status'] ?? 'pending';
            
            $items = $_POST['item_ids'] ?? [];
            $qtys = $_POST['quantities'] ?? [];
            $prices = $_POST['prices'] ?? [];
            
            $total_subtotal = 0;
            $total_vat = 0;
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                
                $vatAmount = $subtotal * ($vatRate / 100);
                $total_subtotal += $subtotal;
                $total_vat += $vatAmount;
            }
            
            $total_with_vat = $total_subtotal + $total_vat;
            
            $stmt = $db->prepare("UPDATE quotations SET customer_id = ?, quotation_date = ?, valid_until = ?, status = ?, total_amount = ?, vat_amount = ?, total_with_vat = ? WHERE id = ?");
            $stmt->execute([$cust_id, $quot_date, $valid_until, $status, $total_subtotal, $total_vat, $total_with_vat, $quot_id]);
            
            // Delete old items
            $db->prepare("DELETE FROM quotation_items WHERE quotation_id = ?")->execute([$quot_id]);
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                $vatAmount = $subtotal * ($vatRate / 100);

                $db->prepare("INSERT INTO quotation_items (quotation_id, item_id, quantity, unit_price, total_price) VALUES (?, ?, ?, ?, ?)")->execute([$quot_id, $item_id, $qty, $price, $subtotal]);
            }
            $db->commit();
            $msg = "Quotation #$quot_id updated!";
            redirectWithMessage($msg, "index.php?page=quotations");
        } catch (Exception $e) { $db->rollBack(); $message = "Error: " . $e->getMessage(); }
    }

    if (isset($_POST['delete_quotation'])) {
        $id = (int)$_POST['id'];
        db()->prepare("DELETE FROM quotations WHERE id = ?")->execute([$id]);
        redirectWithMessage("Quotation deleted!", "index.php?page=quotations");
    }

    if (isset($_POST['add_lpo'])) {
        $db = db();
        try {
            $db->beginTransaction();
            $supp_id = (int)$_POST['supplier_id'];
            $lpo_date = $_POST['lpo_date'] ?: date('Y-m-d');
            $delivery_date = $_POST['delivery_date'] ?: null;
            $status = 'pending';
            $terms = $_POST['terms_conditions'] ?? '';
            
            $items = $_POST['item_ids'] ?? [];
            $qtys = $_POST['quantities'] ?? [];
            $prices = $_POST['prices'] ?? [];
            
            $total_subtotal = 0;
            $total_vat = 0;
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                
                $vatAmount = $subtotal * ($vatRate / 100);
                $total_subtotal += $subtotal;
                $total_vat += $vatAmount;
            }
            
            $total_with_vat = $total_subtotal + $total_vat;
            
            [$lpoInsertSql, $lpoInsertValues] = db_insert_sql_for_existing_columns('lpos', [
                'supplier_id' => $supp_id,
                'lpo_date' => $lpo_date,
                'delivery_date' => $delivery_date,
                'status' => 'pending',
                'total_amount' => $total_subtotal,
                'vat_amount' => $total_vat,
                'total_with_vat' => $total_with_vat,
                'terms_conditions' => $terms,
                'outlet_id' => current_outlet_id(),
            ]);
            $stmt = $db->prepare($lpoInsertSql);
            $stmt->execute($lpoInsertValues);
            $lpo_id = $db->lastInsertId();
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                $vatAmount = $subtotal * ($vatRate / 100);

                $db->prepare("INSERT INTO lpo_items (lpo_id, item_id, quantity, unit_price, vat_percentage, vat_amount, total_amount) VALUES (?, ?, ?, ?, ?, ?, ?)")->execute([$lpo_id, $item_id, $qty, $price, $vatRate, $vatAmount, $subtotal]);
            }
            $db->commit();
            redirectWithMessage("LPO #$lpo_id created!", "index.php?page=lpos");
        } catch (Exception $e) { $db->rollBack(); $message = "Error: " . $e->getMessage(); }
    }

    if (isset($_POST['edit_lpo'])) {
        $db = db();
        try {
            $db->beginTransaction();
            $lpo_id = (int)$_POST['lpo_id'];
            $supp_id = (int)$_POST['supplier_id'];
            $lpo_date = $_POST['lpo_date'];
            $delivery_date = $_POST['delivery_date'] ?: null;
            $status = $_POST['status'] ?? 'pending';
            $terms = $_POST['terms_conditions'] ?? '';
            
            $items = $_POST['item_ids'] ?? [];
            $qtys = $_POST['quantities'] ?? [];
            $prices = $_POST['prices'] ?? [];
            
            $total_subtotal = 0;
            $total_vat = 0;
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                
                $vatAmount = $subtotal * ($vatRate / 100);
                $total_subtotal += $subtotal;
                $total_vat += $vatAmount;
            }
            
            $total_with_vat = $total_subtotal + $total_vat;
            
            $stmt = $db->prepare("UPDATE lpos SET supplier_id = ?, lpo_date = ?, delivery_date = ?, status = ?, total_amount = ?, vat_amount = ?, total_with_vat = ?, terms_conditions = ? WHERE id = ?");
            $stmt->execute([$supp_id, $lpo_date, $delivery_date, $status, $total_subtotal, $total_vat, $total_with_vat, $terms, $lpo_id]);
            
            $db->prepare("DELETE FROM lpo_items WHERE lpo_id = ?")->execute([$lpo_id]);
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                $vatAmount = $subtotal * ($vatRate / 100);

                $db->prepare("INSERT INTO lpo_items (lpo_id, item_id, quantity, unit_price, vat_percentage, vat_amount, total_amount) VALUES (?, ?, ?, ?, ?, ?, ?)")->execute([$lpo_id, $item_id, $qty, $price, $vatRate, $vatAmount, $subtotal]);
            }
            $db->commit();
            redirectWithMessage("LPO #$lpo_id updated!", "index.php?page=lpos");
        } catch (Exception $e) { $db->rollBack(); $message = "Error: " . $e->getMessage(); }
    }

    if (isset($_POST['delete_lpo'])) {
        $id = (int)$_POST['id'];
        db()->prepare("DELETE FROM lpos WHERE id = ?")->execute([$id]);
        redirectWithMessage("LPO deleted!", "index.php?page=lpos");
    }

    if (isset($_POST['convert_to_invoice'])) {
        $db = db();
        try {
            $db->beginTransaction();
            $quot_id = (int)$_POST['quotation_id'];
            
            $stmt = $db->prepare("SELECT * FROM quotations WHERE id = ?");
            $stmt->execute([$quot_id]);
            $quot = $stmt->fetch();
            
            if (!$quot) throw new Exception("Quotation not found.");
            if ($quot['status'] === 'converted') throw new Exception("Quotation already converted.");
            
            $stmtItems = $db->prepare("SELECT * FROM quotation_items WHERE quotation_id = ?");
            $stmtItems->execute([$quot_id]);
            $qItems = $stmtItems->fetchAll();
            
            // Create Invoice
            $inv_date = date('Y-m-d');
            $stmtInv = $db->prepare("INSERT INTO invoices (customer_id, invoice_date, status, payment_type, total_amount, vat_amount, total_with_vat, paid_amount, outlet_id) VALUES (?, ?, 'unpaid', 'credit', ?, ?, ?, 0, ?)");
            $stmtInv->execute([$quot['customer_id'], $inv_date, $quot['total_amount'], $quot['vat_amount'], $quot['total_with_vat'], current_outlet_id()]);
            $inv_id = $db->lastInsertId();
            
            $items_for_journal = [];
            foreach ($qItems as $item) {
                $lineVatAmount = line_item_vat_amount($db, $item);
                $db->prepare("INSERT INTO invoice_items (invoice_id, item_id, quantity, unit_price, vat_amount, total_price) VALUES (?, ?, ?, ?, ?, ?)")->execute([$inv_id, $item['item_id'], $item['quantity'], $item['unit_price'], $lineVatAmount, $item['total_price']]);
                
                // Update stock
                update_stock($item['item_id'], -$item['quantity']);
                $items_for_journal[] = ['id' => $item['item_id'], 'qty' => $item['quantity']];
            }
            
            // Update Quotation status
            $db->prepare("UPDATE quotations SET status = 'converted' WHERE id = ?")->execute([$quot_id]);
            
            // Accounting
            recordSaleJournal($inv_id, $quot['total_with_vat'], $inv_date, $items_for_journal, $quot['vat_amount']);
            
            $db->commit();
            redirectWithMessage("Quotation converted to Invoice #$inv_id successfully!", "index.php?page=sales");
        } catch (Exception $e) { $db->rollBack(); $message = "Error: " . $e->getMessage(); }
    }

    if (isset($_POST['convert_lpo_to_purchase'])) {
        $db = db();
        try {
            $db->beginTransaction();
            $lpo_id = (int)$_POST['lpo_id'];
            
            $stmt = $db->prepare("SELECT * FROM lpos WHERE id = ?");
            $stmt->execute([$lpo_id]);
            $lpo = $stmt->fetch();
            
            if (!$lpo) throw new Exception("LPO not found.");
            if ($lpo['status'] === 'converted') throw new Exception("LPO already converted.");
            
            $stmtItems = $db->prepare("SELECT * FROM lpo_items WHERE lpo_id = ?");
            $stmtItems->execute([$lpo_id]);
            $lItems = $stmtItems->fetchAll();
            
            // Create Purchase Invoice
            $pur_date = date('Y-m-d');
            $stmtPur = $db->prepare("INSERT INTO purchases (supplier_id, invoice_date, status, payment_type, total_amount, vat_amount, total_with_vat, paid_amount, outlet_id) VALUES (?, ?, 'unpaid', 'credit', ?, ?, ?, 0, ?)");
            $stmtPur->execute([$lpo['supplier_id'], $pur_date, $lpo['total_amount'], $lpo['vat_amount'], $lpo['total_with_vat'], current_outlet_id()]);
            $pur_id = $db->lastInsertId();
            
            $items_for_journal = [];
            foreach ($lItems as $item) {
                $db->prepare("INSERT INTO purchase_items (purchase_id, item_id, quantity, unit_price, vat_amount, total_price) VALUES (?, ?, ?, ?, ?, ?)")->execute([$pur_id, $item['item_id'], $item['quantity'], $item['unit_price'], $item['vat_amount'], $item['total_amount']]);
                
                // Update stock
                update_stock($item['item_id'], $item['quantity']);
                $items_for_journal[] = ['id' => $item['item_id'], 'qty' => $item['quantity']];
            }
            
            // Update LPO status
            $db->prepare("UPDATE lpos SET status = 'converted' WHERE id = ?")->execute([$lpo_id]);
            
            $db->commit();
            redirectWithMessage("LPO converted to Purchase Invoice #$pur_id successfully!", "index.php?page=purchases");
        } catch (Exception $e) { $db->rollBack(); $message = "Error: " . $e->getMessage(); }
    }

    if (isset($_POST['record_payment'])) {
        $id = (int)$_POST['invoice_id'];
        $amount = (float)$_POST['amount'];
        $date = $_POST['payment_date'] ?: date('Y-m-d');
        $method = $_POST['payment_method'] ?? 'Cash';
        $type = ($page === 'purchases') ? 'purchase' : 'sale';
        $table = ($type === 'purchase') ? 'purchases' : 'invoices';
        $payment_table = ($type === 'purchase') ? 'purchase_payments' : 'payments';
        $fk_col = ($type === 'purchase') ? 'purchase_id' : 'invoice_id';

        $db = db();
        $db->prepare("INSERT INTO $payment_table ($fk_col, amount, payment_date, payment_method, notes) VALUES (?, ?, ?, ?, ?)")->execute([$id, $amount, $date, $method, $_POST['notes'] ?? '']);
        $pay_id = $db->lastInsertId();
        $db->prepare("UPDATE $table SET paid_amount = paid_amount + ?, status = IF(paid_amount + ? >= total_with_vat, 'paid', 'partially_paid') WHERE id = ?")->execute([$amount, $amount, $id]);
        
        if ($type === 'sale') recordPaymentReceivedJournal((int)$pay_id, $amount, $date, $method);
        else recordPaymentMadeJournal((int)$pay_id, $amount, $date, $method);
        
        $_SESSION['trigger_receipt_modal'] = true; 
        $_SESSION['show_receipt_id'] = $pay_id;
        redirectWithMessage("Payment recorded!", "index.php?page=" . ($type === 'purchase' ? 'purchases' : 'sales'));
    }

    if (isset($_POST['add_expense'])) {
        $amt = (float)$_POST['amount'];
        $date = $_POST['expense_date'] ?: date('Y-m-d');
        $desc = $_POST['description'] ?? '';
        db()->prepare("INSERT INTO expenses (category_id, amount, expense_date, reference_no, description) VALUES (?, ?, ?, ?, ?)")->execute([(int)$_POST['category_id'], $amt, $date, $_POST['reference_no'] ?? '', $desc]);
        recordExpenseJournal(db()->lastInsertId(), $amt, $date, $desc);
        redirectWithMessage("Expense recorded!", "index.php?page=expenses");
    }

    
    # --- Unified Import Logic (Excel & CSV) ---
    # --- Unified Import Logic (Excel & CSV) ---
    if (isset($_POST['import_items'])) {
        error_log("Import items triggered.");
        $count = 0;
        $skipped = 0;
        if (isset($_FILES['excel_file']) && $_FILES['excel_file']['error'] === 0) {
            $tmpPath = $_FILES['excel_file']['tmp_name'];
            $rows = [];
            if ( $xlsx = \Shuchkin\SimpleXLSX::parse($tmpPath) ) {
                $rows = $xlsx->rows();
            } else {
                $handle = fopen($tmpPath, "r");
                $firstLine = fgets($handle); rewind($handle);
                $sep = (substr_count($firstLine, ';') > substr_count($firstLine, ',')) ? ';' : ',';
                $bom = fread($handle, 3); if ($bom !== "ï»¿") rewind($handle);
                while (($data = fgetcsv($handle, 0, $sep)) !== FALSE) $rows[] = $data;
                fclose($handle);
            }
            if (isset($rows[0][0]) && stripos($rows[0][0], 'sku') !== false) array_shift($rows);

            $current_oid = current_outlet_id();
            foreach ($rows as $row) {
                if (empty($row[0])) continue;
                $sku = trim((string)$row[0]);
                if ($sku_error = validateItemSkuBarcode($sku)) {
                    $skipped++;
                    continue;
                }
                $name_en = trim((string)($row[1] ?? ''));
                $name_ar = trim((string)($row[2] ?? ''));
                $sale_price = (float)($row[3] ?? 0);
                $purchase_price = (float)($row[4] ?? 0);
                $qty = (float)($row[5] ?? 0);
                $vat_rate = (float)($row[6] ?? 0);
                
                $check = db()->prepare("SELECT id FROM stock_items WHERE sku = ? AND outlet_id = ?");
                $check->execute([$sku, $current_oid]);
                $exists = $check->fetch(PDO::FETCH_ASSOC);

                if ($exists) {
                    $item_id = $exists['id'];
                    // Update Item (including stock_quantity)
                    db()->prepare("UPDATE stock_items SET name_en = ?, name_ar = ?, sale_price = ?, purchase_price = ?, vat_rate = ?, stock_quantity = ? WHERE id = ?")
                      ->execute([$name_en, $name_ar, $sale_price, $purchase_price, $vat_rate, $qty, $item_id]);
                } else {
                    // Insert Item
                    db()->prepare("INSERT INTO stock_items (outlet_id, sku, name_en, name_ar, sale_price, purchase_price, stock_quantity, vat_rate) VALUES (?, ?, ?, ?, ?, ?, ?, ?)")
                      ->execute([$current_oid, $sku, $name_en, $name_ar, $sale_price, $purchase_price, $qty, $vat_rate]); 
                }
                $count++;
            }
            $weightConfig = getWeightBarcodeConfig();
            $summary = "Import items completed! $count processed.";
            if ($skipped > 0) {
                $summary .= " $skipped skipped because 13-digit barcodes starting with {$weightConfig['prefix_start']}-{$weightConfig['prefix_end']} are reserved for weighing scale barcodes.";
            }
            redirectWithMessage($summary, "index.php?page=items");
        }
    }

    if (isset($_POST['import_customers']) || isset($_POST['import_suppliers'])) {
        $type = isset($_POST['import_customers']) ? 'customers' : 'suppliers';
        $table = $type; 
        error_log("Import $type triggered.");
        $count = 0;
        if (isset($_FILES['excel_file']) && $_FILES['excel_file']['error'] === 0) {
            $tmpPath = $_FILES['excel_file']['tmp_name'];
            $rows = [];
            if ( $xlsx = \Shuchkin\SimpleXLSX::parse($tmpPath) ) {
                $rows = $xlsx->rows();
            } else {
                $handle = fopen($tmpPath, "r");
                $firstLine = fgets($handle); rewind($handle);
                $sep = (substr_count($firstLine, ';') > substr_count($firstLine, ',')) ? ';' : ',';
                $bom = fread($handle, 3); if ($bom !== "ï»¿") rewind($handle);
                while (($data = fgetcsv($handle, 0, $sep)) !== FALSE) $rows[] = $data;
                fclose($handle);
            }
            if (isset($rows[0][0]) && (stripos($rows[0][0], 'name') !== false || stripos($rows[0][0], 'id') !== false)) array_shift($rows);

            $taxColumn = entity_tax_column($table);
            $importColumns = ['name', 'email', 'phone'];
            $importValues = ['?', '?', '?'];

            if ($taxColumn !== null) {
                $importColumns[] = $taxColumn;
                $importValues[] = '?';
            }

            $importColumns[] = 'created_at';
            $importValues[] = 'NOW()';

            if ($table === 'suppliers') {
                $importColumns[] = 'outlet_id';
                $importValues[] = '?';
            }

            $importSql = "INSERT INTO $table (" . implode(', ', $importColumns) . ") VALUES (" . implode(', ', $importValues) . ")";
            $importStmt = db()->prepare($importSql);

            foreach ($rows as $row) {
                if (empty($row[0])) continue;
                $name = trim((string)$row[0]);
                if (!$name) continue;
                $email = trim((string)($row[1] ?? ''));
                $phone = trim((string)($row[2] ?? ''));
                $tax_id = trim((string)($row[3] ?? ''));

                $importParams = [$name, $email, $phone];
                if ($taxColumn !== null) {
                    $importParams[] = $tax_id;
                }
                if ($table === 'suppliers') {
                    $importParams[] = current_outlet_id();
                }

                $importStmt->execute($importParams);
                $count++;
            }
            redirectWithMessage("Import $type completed! $count processed.", "index.php?page=$type");
        }
    }

    if (isset($_POST['import_categories'])) {
        $count = 0;
        if (isset($_FILES['excel_file']) && $_FILES['excel_file']['error'] === 0) {
            $tmpPath = $_FILES['excel_file']['tmp_name'];
            $rows = [];
            if ( $xlsx = \Shuchkin\SimpleXLSX::parse($tmpPath) ) { $rows = $xlsx->rows(); } 
            else { 
                $handle = fopen($tmpPath, "r");
                while (($data = fgetcsv($handle)) !== FALSE) $rows[] = $data; 
                fclose($handle); 
            }
            if (isset($rows[0][0]) && stripos($rows[0][0], 'name') !== false) array_shift($rows);
            
            $current_oid = current_outlet_id();
            foreach ($rows as $row) {
                if (empty($row[0])) continue;
                $name_en = trim((string)$row[0]);
                $name_ar = trim((string)($row[1] ?? $name_en));
                
                db()->prepare("INSERT INTO stock_categories (name_en, name_ar, outlet_id) VALUES (?, ?, ?)")
                  ->execute([$name_en, $name_ar, $current_oid]);
                $count++;
            }
            redirectWithMessage("Import categories completed! $count processed.", "index.php?page=categories");
        }
    }

    if (isset($_POST['import_units'])) {
        $count = 0;
        if (isset($_FILES['excel_file']) && $_FILES['excel_file']['error'] === 0) {
            $tmpPath = $_FILES['excel_file']['tmp_name'];
            $rows = [];
            if ( $xlsx = \Shuchkin\SimpleXLSX::parse($tmpPath) ) { $rows = $xlsx->rows(); } 
            else { 
                $handle = fopen($tmpPath, "r");
                $firstLine = fgets($handle); rewind($handle);
                $sep = (substr_count($firstLine, ';') > substr_count($firstLine, ',')) ? ';' : ',';
                $bom = fread($handle, 3); if ($bom !== "ï»¿") rewind($handle);
                while (($data = fgetcsv($handle, 0, $sep)) !== FALSE) $rows[] = $data;
                fclose($handle); 
            }
            if (isset($rows[0][0]) && (stripos($rows[0][0], 'name') !== false || stripos($rows[0][0], 'id') !== false)) array_shift($rows);
            
            foreach ($rows as $row) {
                if (empty($row[0])) continue;
                $name_en = trim((string)$row[0]);
                $name_ar = trim((string)($row[1] ?? ''));
                if ($name_ar === '') $name_ar = $name_en;
                
                db()->prepare("INSERT INTO stock_units (name_en, name_ar, short_name_en, short_name_ar, outlet_id) VALUES (?, ?, ?, ?, ?)")
                  ->execute([$name_en, $name_ar, $name_en, $name_ar, current_outlet_id()]);
                $count++;
            }
            redirectWithMessage("Import units completed! $count processed.", "index.php?page=units");
        }
    }

    if (isset($_POST['add_expense_category'])) {
        $name_en = $_POST['name_en'] ?? '';
        $name_ar = $_POST['name_ar'] ?? '';
        db()->prepare("INSERT INTO expense_categories (name_en, name_ar) VALUES (?, ?)")->execute([$name_en, $name_ar]);
        redirectWithMessage("Expense category added!", "index.php?page=expense_categories");
    }

    if (isset($_POST['add_payment_method'])) {
        $name_en = trim((string)($_POST['name_en'] ?? ''));
        $name_ar = trim((string)($_POST['name_ar'] ?? ''));

        if ($name_en === '' && $name_ar === '') {
            redirectWithMessage("Please enter a payment method name.", "index.php?page=payment_methods");
        }

        if ($name_en === '') {
            $name_en = $name_ar;
        }
        if ($name_ar === '') {
            $name_ar = $name_en;
        }

        if (db_column_exists('payment_methods', 'name_en') || db_column_exists('payment_methods', 'name_ar')) {
            $columns = [];
            $placeholders = [];
            $values = [];

            if (db_column_exists('payment_methods', 'name_en')) {
                $columns[] = 'name_en';
                $placeholders[] = '?';
                $values[] = $name_en;
            }
            if (db_column_exists('payment_methods', 'name_ar')) {
                $columns[] = 'name_ar';
                $placeholders[] = '?';
                $values[] = $name_ar;
            }

            db()->prepare("INSERT INTO payment_methods (" . implode(', ', $columns) . ") VALUES (" . implode(', ', $placeholders) . ")")->execute($values);
        } elseif (db_column_exists('payment_methods', 'name')) {
            db()->prepare("INSERT INTO payment_methods (`name`) VALUES (?)")->execute([$name_en]);
        } else {
            throw new RuntimeException('payment_methods table is missing a usable name column.');
        }

        redirectWithMessage("Payment method added!", "index.php?page=payment_methods");
    }

    if (isset($_POST['edit_payment_method'])) {
        $id = (int)($_POST['id'] ?? 0);
        $name_en = trim((string)($_POST['name_en'] ?? ''));
        $name_ar = trim((string)($_POST['name_ar'] ?? ''));

        if ($id <= 0) {
            redirectWithMessage("Invalid payment method.", "index.php?page=payment_methods");
        }
        if ($name_en === '' && $name_ar === '') {
            redirectWithMessage("Please enter a payment method name.", "index.php?page=payment_methods");
        }

        if ($name_en === '') {
            $name_en = $name_ar;
        }
        if ($name_ar === '') {
            $name_ar = $name_en;
        }

        if (db_column_exists('payment_methods', 'name_en') || db_column_exists('payment_methods', 'name_ar')) {
            $sets = [];
            $values = [];

            if (db_column_exists('payment_methods', 'name_en')) {
                $sets[] = 'name_en = ?';
                $values[] = $name_en;
            }
            if (db_column_exists('payment_methods', 'name_ar')) {
                $sets[] = 'name_ar = ?';
                $values[] = $name_ar;
            }

            $values[] = $id;
            db()->prepare("UPDATE payment_methods SET " . implode(', ', $sets) . " WHERE id = ?")->execute($values);
        } elseif (db_column_exists('payment_methods', 'name')) {
            db()->prepare("UPDATE payment_methods SET `name` = ? WHERE id = ?")->execute([$name_en, $id]);
        } else {
            throw new RuntimeException('payment_methods table is missing a usable name column.');
        }

        redirectWithMessage("Payment method updated!", "index.php?page=payment_methods");
    }

    if (isset($_POST['delete_payment_method'])) {
        $id = (int)($_POST['id'] ?? 0);
        if ($id > 0) {
            db()->prepare("DELETE FROM payment_methods WHERE id = ?")->execute([$id]);
        }
        redirectWithMessage("Payment method deleted!", "index.php?page=payment_methods");
    }

    if (isset($_POST['delete_invoice'])) {
        $id = (int)$_POST['id'];
        $type = ($page === 'purchases') ? 'purchase' : 'sale';
        $table = ($type === 'purchase') ? 'purchases' : 'invoices';
        $item_table = ($type === 'purchase') ? 'purchase_items' : 'invoice_items';
        $fk_col = ($type === 'purchase') ? 'purchase_id' : 'invoice_id';

        db()->prepare("DELETE FROM $table WHERE id = ?")->execute([$id]);
        db()->prepare("DELETE FROM $item_table WHERE $fk_col = ?")->execute([$id]);
        redirectWithMessage(($type === 'purchase' ? "Purchase" : "Invoice") . " deleted!", "index.php?page=" . ($type === 'purchase' ? 'purchases' : 'sales'));
    }

    if (isset($_POST['delete_quotation'])) {
        $id = (int)$_POST['id'];
        db()->prepare("DELETE FROM quotations WHERE id = ?")->execute([$id]);
        $message = "Quotation deleted!";
    }

    if (isset($_POST['add_lpo'])) {
        $db = db();
        try {
            $db->beginTransaction();
            $supp_id = (int)$_POST['supplier_id'];
            $lpo_date = $_POST['lpo_date'] ?: date('Y-m-d');
            $delivery_date = $_POST['delivery_date'] ?: null;
            $terms = $_POST['terms_conditions'] ?? '';
            
            $items = $_POST['item_ids'] ?? [];
            if (empty($items)) {
                throw new Exception("Please add at least one item.");
            }
            $qtys = $_POST['quantities'] ?? [];
            $prices = $_POST['prices'] ?? [];
            
            $total_subtotal = 0;
            $total_vat = 0;
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                
                $vatAmount = $subtotal * ($vatRate / 100);
                $total_subtotal += $subtotal;
                $total_vat += $vatAmount;
            }
            
            $total_with_vat = $total_subtotal + $total_vat;
            
            [$lpoInsertSql, $lpoInsertValues] = db_insert_sql_for_existing_columns('lpos', [
                'supplier_id' => $supp_id,
                'lpo_date' => $lpo_date,
                'delivery_date' => $delivery_date,
                'status' => 'pending',
                'total_amount' => $total_subtotal,
                'vat_amount' => $total_vat,
                'total_with_vat' => $total_with_vat,
                'terms_conditions' => $terms,
                'outlet_id' => current_outlet_id(),
            ]);
            $stmt = $db->prepare($lpoInsertSql);
            $stmt->execute($lpoInsertValues);
            $lpo_id = $db->lastInsertId();
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                $vatAmount = $subtotal * ($vatRate / 100);

                $db->prepare("INSERT INTO lpo_items (lpo_id, item_id, quantity, unit_price, vat_percentage, vat_amount, total_amount) VALUES (?, ?, ?, ?, ?, ?, ?)")->execute([$lpo_id, $item_id, $qty, $price, $vatRate, $vatAmount, $subtotal]);
            }
            $db->commit();
            redirectWithMessage("LPO #$lpo_id created!", "index.php?page=lpos");
        } catch (Exception $e) { $db->rollBack(); $message = "Error: " . $e->getMessage(); }
    }

    if (isset($_POST['edit_lpo'])) {
        $db = db();
        try {
            $db->beginTransaction();
            $lpo_id = (int)$_POST['lpo_id'];
            $supp_id = (int)$_POST['supplier_id'];
            $lpo_date = $_POST['lpo_date'];
            $delivery_date = $_POST['delivery_date'] ?: null;
            $status = $_POST['status'] ?? 'pending';
            $terms = $_POST['terms_conditions'] ?? '';
            
            $items = $_POST['item_ids'] ?? [];
            if (empty($items)) {
                throw new Exception("Please add at least one item.");
            }
            $qtys = $_POST['quantities'] ?? [];
            $prices = $_POST['prices'] ?? [];
            
            $total_subtotal = 0;
            $total_vat = 0;
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                
                $vatAmount = $subtotal * ($vatRate / 100);
                $total_subtotal += $subtotal;
                $total_vat += $vatAmount;
            }
            
            $total_with_vat = $total_subtotal + $total_vat;
            
            $stmt = $db->prepare("UPDATE lpos SET supplier_id = ?, lpo_date = ?, delivery_date = ?, status = ?, total_amount = ?, vat_amount = ?, total_with_vat = ?, terms_conditions = ? WHERE id = ?");
            $stmt->execute([$supp_id, $lpo_date, $delivery_date, $status, $total_subtotal, $total_vat, $total_with_vat, $terms, $lpo_id]);
            
            $db->prepare("DELETE FROM lpo_items WHERE lpo_id = ?")->execute([$lpo_id]);
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                $vatAmount = $subtotal * ($vatRate / 100);

                $db->prepare("INSERT INTO lpo_items (lpo_id, item_id, quantity, unit_price, vat_percentage, vat_amount, total_amount) VALUES (?, ?, ?, ?, ?, ?, ?)")->execute([$lpo_id, $item_id, $qty, $price, $vatRate, $vatAmount, $subtotal]);
            }
            $db->commit();
            $message = "LPO #$lpo_id updated!";
        } catch (Exception $e) { $db->rollBack(); $message = "Error: " . $e->getMessage(); }
    }

    if (isset($_POST['delete_lpo'])) {
        $id = (int)$_POST['id'];
        db()->prepare("DELETE FROM lpos WHERE id = ?")->execute([$id]);
        $message = "LPO deleted!";
    }

    if (isset($_POST['convert_to_invoice'])) {
        $db = db();
        try {
            $db->beginTransaction();
            $quot_id = (int)$_POST['quotation_id'];
            
            $stmt = $db->prepare("SELECT * FROM quotations WHERE id = ?");
            $stmt->execute([$quot_id]);
            $quot = $stmt->fetch();
            
            if (!$quot) throw new Exception("Quotation not found.");
            if ($quot['status'] === 'converted') throw new Exception("Quotation already converted.");
            
            $stmtItems = $db->prepare("SELECT * FROM quotation_items WHERE quotation_id = ?");
            $stmtItems->execute([$quot_id]);
            $qItems = $stmtItems->fetchAll();
            
            // Create Invoice
            $inv_date = date('Y-m-d');
            $stmtInv = $db->prepare("INSERT INTO invoices (customer_id, invoice_date, status, payment_type, total_amount, vat_amount, total_with_vat, paid_amount, outlet_id) VALUES (?, ?, 'unpaid', 'credit', ?, ?, ?, 0, ?)");
            $stmtInv->execute([$quot['customer_id'], $inv_date, $quot['total_amount'], $quot['vat_amount'], $quot['total_with_vat'], current_outlet_id()]);
            $inv_id = $db->lastInsertId();
            
            $items_for_journal = [];
            foreach ($qItems as $item) {
                $lineVatAmount = line_item_vat_amount($db, $item);
                $db->prepare("INSERT INTO invoice_items (invoice_id, item_id, quantity, unit_price, vat_amount, total_price) VALUES (?, ?, ?, ?, ?, ?)")->execute([$inv_id, $item['item_id'], $item['quantity'], $item['unit_price'], $lineVatAmount, $item['total_price']]);
                
                // Update stock
                update_stock($item['item_id'], -$item['quantity']);
                $items_for_journal[] = ['id' => $item['item_id'], 'qty' => $item['quantity']];
            }
            
            // Update Quotation status
            $db->prepare("UPDATE quotations SET status = 'converted' WHERE id = ?")->execute([$quot_id]);
            
            // Accounting
            recordSaleJournal($inv_id, $quot['total_with_vat'], $inv_date, $items_for_journal, $quot['vat_amount']);
            
            $db->commit();
            $message = "Quotation converted to Invoice #$inv_id successfully!";
        } catch (Exception $e) { $db->rollBack(); $message = "Error: " . $e->getMessage(); }
    }

    if (isset($_POST['convert_lpo_to_purchase'])) {
        $db = db();
        try {
            $db->beginTransaction();
            $lpo_id = (int)$_POST['lpo_id'];
            
            $stmt = $db->prepare("SELECT * FROM lpos WHERE id = ?");
            $stmt->execute([$lpo_id]);
            $lpo = $stmt->fetch();
            
            if (!$lpo) throw new Exception("LPO not found.");
            if ($lpo['status'] === 'converted') throw new Exception("LPO already converted.");
            
            $stmtItems = $db->prepare("SELECT * FROM lpo_items WHERE lpo_id = ?");
            $stmtItems->execute([$lpo_id]);
            $lItems = $stmtItems->fetchAll();
            
            // Create Purchase Invoice
            $inv_date = date('Y-m-d');
            $stmtPur = $db->prepare("INSERT INTO purchases (supplier_id, invoice_date, status, payment_type, total_amount, vat_amount, total_with_vat, paid_amount, outlet_id) VALUES (?, ?, 'unpaid', 'credit', ?, ?, ?, 0, ?)");
            $stmtPur->execute([$lpo['supplier_id'], $inv_date, $lpo['total_amount'], $lpo['vat_amount'], $lpo['total_with_vat'], current_outlet_id()]);
            $pur_id = $db->lastInsertId();
            
            $items_for_journal = [];
            foreach ($lItems as $item) {
                $db->prepare("INSERT INTO purchase_items (purchase_id, item_id, quantity, unit_price, vat_amount, total_price) VALUES (?, ?, ?, ?, ?, ?)")->execute([$pur_id, $item['item_id'], $item['quantity'], $item['unit_price'], $item['vat_amount'], $item['total_amount']]);
                
                // Update stock
                update_stock($item['item_id'], $item['quantity']);
                $items_for_journal[] = ['id' => $item['item_id'], 'qty' => $item['quantity']];
            }
            
            // Update LPO status
            $db->prepare("UPDATE lpos SET status = 'converted' WHERE id = ?")->execute([$lpo_id]);
            
            // Accounting (if exists)
            if (function_exists('recordPurchaseJournal')) {
                recordPurchaseJournal($pur_id, $lpo['total_with_vat'], $inv_date, $items_for_journal, $lpo['vat_amount']);
            }
            
            $db->commit();
            $message = "LPO converted to Purchase Invoice #$pur_id successfully!";
            header("Location: index.php?page=purchases");
            exit;
        } catch (Exception $e) { $db->rollBack(); $message = "Error: " . $e->getMessage(); }
    }

    if (isset($_POST['record_payment'])) {
        $id = (int)$_POST['invoice_id'];
        $amount = (float)$_POST['amount'];
        $date = $_POST['payment_date'] ?: date('Y-m-d');
        $method = $_POST['payment_method'] ?? 'Cash';
        $type = ($page === 'purchases') ? 'purchase' : 'sale';
        $table = ($type === 'purchase') ? 'purchases' : 'invoices';
        $payment_table = ($type === 'purchase') ? 'purchase_payments' : 'payments';
        $fk_col = ($type === 'purchase') ? 'purchase_id' : 'invoice_id';

        $db = db();
        $db->prepare("INSERT INTO $payment_table ($fk_col, amount, payment_date, payment_method, notes) VALUES (?, ?, ?, ?, ?)")->execute([$id, $amount, $date, $method, $_POST['notes'] ?? '']);
        $pay_id = $db->lastInsertId();
        $db->prepare("UPDATE $table SET paid_amount = paid_amount + ?, status = IF(paid_amount + ? >= total_with_vat, 'paid', 'partially_paid') WHERE id = ?")->execute([$amount, $amount, $id]);
        
        if ($type === 'sale') recordPaymentReceivedJournal((int)$pay_id, $amount, $date, $method);
        else recordPaymentMadeJournal((int)$pay_id, $amount, $date, $method);
        $message = "Payment recorded!";
        $_SESSION['trigger_receipt_modal'] = true; $_SESSION['show_receipt_id'] = $pay_id;
    }

    if (isset($_POST['add_expense'])) {
        $amt = (float)$_POST['amount'];
        $date = $_POST['expense_date'] ?: date('Y-m-d');
        $desc = $_POST['description'] ?? '';
        db()->prepare("INSERT INTO expenses (category_id, amount, expense_date, reference_no, description) VALUES (?, ?, ?, ?, ?)")->execute([(int)$_POST['category_id'], $amt, $date, $_POST['reference_no'] ?? '', $desc]);
        recordExpenseJournal(db()->lastInsertId(), $amt, $date, $desc);
        $message = "Expense recorded!";
    }

    if (isset($_POST['edit_invoice'])) {
        $db = db();
        try {
            $db->beginTransaction();
            $id = (int)$_POST['invoice_id'];
            $type = ($page === 'purchases') ? 'purchase' : 'sale';
            $table = ($type === 'purchase') ? 'purchases' : 'invoices';
            $item_table = ($type === 'purchase') ? 'purchase_items' : 'invoice_items';
            $cust_supplier_col = ($type === 'purchase') ? 'supplier_id' : 'customer_id';
            $fk_col = ($type === 'purchase') ? 'purchase_id' : 'invoice_id';

            $cust_id = (int)$_POST['customer_id'];
            $date = $_POST['invoice_date'] ?: date('Y-m-d');
            $due_date = $_POST['due_date'] ?: null;
            $status = $_POST['status'] ?? 'pending';
            $pay_type = $_POST['payment_type'] ?? 'cash';
            
            $items = $_POST['item_ids'] ?? [];
            $qtys = $_POST['quantities'] ?? [];
            $prices = $_POST['prices'] ?? [];
            
            $total_subtotal = 0;
            $total_vat = 0;
            
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                
                $vatAmount = $subtotal * ($vatRate / 100);
                $total_subtotal += $subtotal;
                $total_vat += $vatAmount;
            }
            
            $total_with_vat = $total_subtotal + $total_vat;
            $paid = (float)($_POST['paid_amount'] ?? 0);
            if ($status === 'paid') $paid = $total_with_vat;
            
            $db->prepare("UPDATE $table SET $cust_supplier_col = ?, invoice_date = ?, due_date = ?, status = ?, payment_type = ?, total_amount = ?, vat_amount = ?, total_with_vat = ?, paid_amount = ? WHERE id = ?")
               ->execute([$cust_id, $date, $due_date, $status, $pay_type, $total_subtotal, $total_vat, $total_with_vat, $paid, $id]);
            
            // Revert stock for old items
            $stmtOld = $db->prepare("SELECT item_id, quantity FROM $item_table WHERE $fk_col = ?");
            $stmtOld->execute([$id]);
            $oldItems = $stmtOld->fetchAll();
            foreach ($oldItems as $old) {
                $change = ($type === 'sale') ? (float)$old['quantity'] : -(float)$old['quantity'];
                update_stock($old['item_id'], $change);
            }
            
            // Delete old items
            $db->prepare("DELETE FROM $item_table WHERE $fk_col = ?")->execute([$id]);
            
            // Insert new items and update stock
            foreach ($items as $i => $item_id) {
                if (!$item_id) continue;
                $qty = (float)$qtys[$i];
                $price = (float)$prices[$i];
                $subtotal = $qty * $price;
                
                $stmtVat = $db->prepare("SELECT vat_rate FROM stock_items WHERE id = ?");
                $stmtVat->execute([$item_id]);
                $vatRate = (float)$stmtVat->fetchColumn();
                $vatAmount = $subtotal * ($vatRate / 100);

                $db->prepare("INSERT INTO $item_table ($fk_col, item_id, quantity, unit_price, vat_amount, total_price) VALUES (?, ?, ?, ?, ?, ?)")->execute([$id, $item_id, $qty, $price, $vatAmount, $subtotal]);
                
                $change = ($type === 'sale') ? -$qty : $qty;
                update_stock($item_id, $change);
            }
            
            $db->commit();
            $msg = ($type === 'purchase' ? "Purchase" : "Invoice") . " updated successfully!";
            redirectWithMessage($msg, "index.php?page=" . ($type === 'purchase' ? 'purchases' : 'sales'));
        } catch (Exception $e) { $db->rollBack(); $message = "Error: " . $e->getMessage(); }
    }

    // --- HR Handlers ---
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    error_log("POST Request detected. Action: " . (print_r($_POST, true)));
}
if (isset($_POST['add_hr_department'])) {
        $name = $_POST['name'] ?? '';
        if ($name) {
            $stmt = db()->prepare("INSERT INTO hr_departments (name) VALUES (?)");
            $stmt->execute([$name]);
            $message = "Department added successfully!";
        }
    }
    if (isset($_POST['edit_hr_department'])) {
        $id = (int)$_POST['id'];
        $name = $_POST['name'] ?? '';
        if ($id && $name) {
            $stmt = db()->prepare("UPDATE hr_departments SET name = ? WHERE id = ?");
            $stmt->execute([$name, $id]);
            redirectWithMessage("Department updated successfully!", "index.php?page=hr_departments");
        }
    }
    if (isset($_POST['delete_hr_department'])) {
        $id = (int)$_POST['id'];
        if ($id) {
            $stmt = db()->prepare("DELETE FROM hr_departments WHERE id = ?");
            $stmt->execute([$id]);
            redirectWithMessage("Department deleted successfully!", "index.php?page=hr_departments");
        }
    }
    if (isset($_POST['add_hr_employee'])) {
        $dept_id = (int)$_POST['department_id'];
        $biometric_id = $_POST['biometric_id'] ?? '';
        $name = $_POST['name'] ?? '';
        $email = $_POST['email'] ?? '';
        $phone = $_POST['phone'] ?? '';
        $pos = $_POST['position'] ?? '';
        $salary = (float)$_POST['salary'];
        $j_date = $_POST['joining_date'] ?: date('Y-m-d');
        
        if ($name) {
            $stmt = db()->prepare("INSERT INTO hr_employees (department_id, biometric_id, name, email, phone, position, salary, joining_date) VALUES (?, ?, ?, ?, ?, ?, ?, ?)");
            $stmt->execute([$dept_id, $biometric_id, $name, $email, $phone, $pos, $salary, $j_date]);
            redirectWithMessage("Employee added successfully!", "index.php?page=hr_employees");
        }
    }
    if (isset($_POST['edit_hr_employee'])) {
        $id = (int)$_POST['id'];
        $dept_id = (int)$_POST['department_id'];
        $biometric_id = $_POST['biometric_id'] ?? '';
        $name = $_POST['name'] ?? '';
        $email = $_POST['email'] ?? '';
        $phone = $_POST['phone'] ?? '';
        $pos = $_POST['position'] ?? '';
        $salary = (float)$_POST['salary'];
        $j_date = $_POST['joining_date'];
        $status = $_POST['status'] ?? 'active';
        
        if ($id && $name) {
            $stmt = db()->prepare("UPDATE hr_employees SET department_id = ?, biometric_id = ?, name = ?, email = ?, phone = ?, position = ?, salary = ?, joining_date = ?, status = ? WHERE id = ?");
            $stmt->execute([$dept_id, $biometric_id, $name, $email, $phone, $pos, $salary, $j_date, $status, $id]);
            redirectWithMessage("Employee updated successfully!", "index.php?page=hr_employees");
        }
    }
    if (isset($_POST['delete_hr_employee'])) {
        $id = (int)$_POST['id'];
        if ($id) {
            $stmt = db()->prepare("DELETE FROM hr_employees WHERE id = ?");
            $stmt->execute([$id]);
            redirectWithMessage("Employee deleted successfully!", "index.php?page=hr_employees");
        }
    }
    if (isset($_POST['mark_hr_attendance'])) {
        $emp_id = (int)$_POST['employee_id'];
        $date = $_POST['attendance_date'] ?: date('Y-m-d');
        $status = $_POST['status'] ?? 'present';
        $in = $_POST['clock_in'] ?: null;
        $out = $_POST['clock_out'] ?: null;
        
        if ($emp_id) {
            $check = db()->prepare("SELECT id FROM hr_attendance WHERE employee_id = ? AND attendance_date = ?");
            $check->execute([$emp_id, $date]);
            if ($check->fetch()) {
                $stmt = db()->prepare("UPDATE hr_attendance SET status = ?, clock_in = ?, clock_out = ? WHERE employee_id = ? AND attendance_date = ?");
                $stmt->execute([$status, $in, $out, $emp_id, $date]);
            } else {
                $stmt = db()->prepare("INSERT INTO hr_attendance (employee_id, attendance_date, status, clock_in, clock_out) VALUES (?, ?, ?, ?, ?)");
                $stmt->execute([$emp_id, $date, $status, $in, $out]);
            }
            redirectWithMessage("Attendance marked successfully!", "index.php?page=hr_attendance&date=$date");
        }
    }
    if (isset($_POST['generate_payroll'])) {
        $emp_id = (int)$_POST['employee_id'];
        $month = (int)$_POST['month'];
        $year = (int)$_POST['year'];
        $bonus = (float)$_POST['bonus'];
        $deduct = (float)$_POST['deductions'];
        $notes = $_POST['notes'] ?? '';
        
        $db = db();
        try {
            $db->beginTransaction();
            $emp = $db->query("SELECT salary FROM hr_employees WHERE id = $emp_id")->fetch();
            if (!$emp) throw new Exception("Employee not found.");
            
            $basic = (float)$emp['salary'];
            $net = $basic + $bonus - $deduct;
            
            $check = $db->prepare("SELECT id FROM hr_payroll WHERE employee_id = ? AND payroll_month = ? AND payroll_year = ?");
            $check->execute([$emp_id, $month, $year]);
            if ($check->fetch()) {
                throw new Exception("Payroll already exists for this employee in the selected period.");
            }
            
            $payrollColumns = ['employee_id', 'payroll_month', 'payroll_year', 'basic_salary', 'bonus', 'deductions', 'net_salary'];
            $payrollPlaceholders = array_fill(0, count($payrollColumns), '?');
            $payrollValues = [$emp_id, $month, $year, $basic, $bonus, $deduct, $net];
            if (db_column_exists('hr_payroll', 'notes')) {
                $payrollColumns[] = 'notes';
                $payrollPlaceholders[] = '?';
                $payrollValues[] = $notes;
            }
            $stmt = $db->prepare("INSERT INTO hr_payroll (" . implode(', ', $payrollColumns) . ") VALUES (" . implode(', ', $payrollPlaceholders) . ")");
            $stmt->execute($payrollValues);
            $db->commit();
            redirectWithMessage("Payroll generated successfully!", "index.php?page=hr_payroll&month=$month&year=$year");
        } catch (Exception $e) { 
            $db->rollBack(); 
            $message = "Error: " . $e->getMessage(); 
        }
    }
    if (isset($_POST['pay_payroll'])) {
        $id = (int)$_POST['id'];
        $db = db();
        try {
            $db->beginTransaction();
            $stmt = $db->prepare("SELECT * FROM hr_payroll WHERE id = ? AND status = 'unpaid'");
            $stmt->execute([$id]);
            $p = $stmt->fetch();
            if ($p) {
                $db->prepare("UPDATE hr_payroll SET status = 'paid', payment_date = CURDATE() WHERE id = ?")->execute([$id]);
                // Accounting
                recordExpenseJournalForPayroll($id, (float)$p['net_salary'], date('Y-m-d'));
                $db->commit();
                redirectWithMessage("Payroll marked as paid and recorded in accounting!", "index.php?page=hr_payroll&month={$p['payroll_month']}&year={$p['payroll_year']}");
            } else {
                throw new Exception("Payroll already paid or not found.");
            }
        } catch (Exception $e) { 
            $db->rollBack(); 
            $message = "Error: " . $e->getMessage(); 
        }
    }
    if (isset($_POST['delete_payroll'])) {
        $id = (int)$_POST['id'];
        $stmt = db()->prepare("SELECT payroll_month, payroll_year FROM hr_payroll WHERE id = ?");
        $stmt->execute([$id]);
        $p = $stmt->fetch();
        if ($p) {
            db()->prepare("DELETE FROM hr_payroll WHERE id = ?")->execute([$id]);
            redirectWithMessage("Payroll record deleted successfully!", "index.php?page=hr_payroll&month={$p['payroll_month']}&year={$p['payroll_year']}");
        }
    }

    if (isset($_POST['add_sales_return'])) {
        $invoice_id = (int)$_POST['invoice_id'];
        $return_date = $_POST['return_date'] ?: date('Y-m-d');
        $notes = $_POST['notes'] ?? '';
        $item_ids = $_POST['item_ids'] ?? [];
        $quantities = $_POST['quantities'] ?? [];
        $prices = $_POST['prices'] ?? [];
        
        if ($invoice_id && !empty($item_ids)) {
            $db = db();
            try {
                $db->beginTransaction();
                
                // Get customer_id from invoice
                $stmtInv = $db->prepare("SELECT customer_id FROM invoices WHERE id = ?");
                $stmtInv->execute([$invoice_id]);
                $customer_id = $stmtInv->fetchColumn();
                
                $total_return = 0;
                foreach ($quantities as $i => $qty) {
                    $total_return += (float)$qty * (float)$prices[$i];
                }
                
                // Insert Sales Return
                $salesReturnReferenceColumn = sales_return_reference_column();
                [$salesReturnInsertSql, $salesReturnInsertValues] = db_insert_sql_for_existing_columns('sales_returns', [
                    $salesReturnReferenceColumn => $invoice_id,
                    'customer_id' => $customer_id,
                    'return_date' => $return_date,
                    'total_amount' => $total_return,
                    'notes' => $notes,
                    'outlet_id' => current_outlet_id(),
                ]);
                $stmt = $db->prepare($salesReturnInsertSql);
                $stmt->execute($salesReturnInsertValues);
                $return_id = $db->lastInsertId();
                
                // Insert Return Items and Update Stock
                $stmtItem = $db->prepare("INSERT INTO sales_return_items (return_id, item_id, quantity, unit_price, total_price) VALUES (?, ?, ?, ?, ?)");
                // $stmtStock = $db->prepare("UPDATE stock_items SET stock_quantity = stock_quantity + ? WHERE id = ?");
                
                foreach ($item_ids as $i => $item_id) {
                    $qty = (float)$quantities[$i];
                    if ($qty > 0) {
                        $price = (float)$prices[$i];
                        $line_total = $qty * $price;
                        $stmtItem->execute([$return_id, $item_id, $qty, $price, $line_total]);
                        update_stock($item_id, $qty);
                    }
                }
                
                $db->commit();
                redirectWithMessage("Sales Return processed successfully!");
            } catch (Exception $e) {
                $db->rollBack();
                $message = "Error processing return: " . $e->getMessage();
            }
        }
    }

    if (isset($_POST['add_purchase_return'])) {
        $invoice_id = (int)$_POST['invoice_id'];
        $return_date = $_POST['return_date'] ?: date('Y-m-d');
        $notes = $_POST['notes'] ?? '';
        $item_ids = $_POST['item_ids'] ?? [];
        $quantities = $_POST['quantities'] ?? [];
        $prices = $_POST['prices'] ?? [];
        
        if ($invoice_id && !empty($item_ids)) {
            $db = db();
            try {
                $db->beginTransaction();
                
                // Get supplier_id from purchase
                $stmtInv = $db->prepare("SELECT supplier_id FROM purchases WHERE id = ?");
                $stmtInv->execute([$invoice_id]);
                $supplier_id = $stmtInv->fetchColumn();
                
                $total_return = 0;
                foreach ($quantities as $i => $qty) {
                    $total_return += (float)$qty * (float)$prices[$i];
                }
                
                // Insert Purchase Return
                $purchaseReturnReferenceColumn = purchase_return_reference_column();
                [$purchaseReturnInsertSql, $purchaseReturnInsertValues] = db_insert_sql_for_existing_columns('purchase_returns', [
                    $purchaseReturnReferenceColumn => $invoice_id,
                    'supplier_id' => $supplier_id,
                    'return_date' => $return_date,
                    'total_amount' => $total_return,
                    'notes' => $notes,
                    'outlet_id' => current_outlet_id(),
                ]);
                $stmt = $db->prepare($purchaseReturnInsertSql);
                $stmt->execute($purchaseReturnInsertValues);
                $return_id = $db->lastInsertId();
                
                // Insert Return Items and Update Stock
                $stmtItem = $db->prepare("INSERT INTO purchase_return_items (return_id, item_id, quantity, unit_price, total_price) VALUES (?, ?, ?, ?, ?)");
                // $stmtStock = $db->prepare("UPDATE stock_items SET stock_quantity = stock_quantity - ? WHERE id = ?");
                
                foreach ($item_ids as $i => $item_id) {
                    $qty = (float)$quantities[$i];
                    if ($qty > 0) {
                        $price = (float)$prices[$i];
                        $line_total = $qty * $price;
                        $stmtItem->execute([$return_id, $item_id, $qty, $price, $line_total]);
                        update_stock($item_id, -$qty);
                    }
                }
                
                $db->commit();
                redirectWithMessage("Purchase Return processed successfully!");
            } catch (Exception $e) {
                $db->rollBack();
                $message = "Error processing return: " . $e->getMessage();
            }
        }
    }

    // --- Biometric Devices Handlers ---
    if (isset($_POST['add_biometric_device'])) {
        $name = $_POST['device_name'] ?? '';
        $ip = $_POST['ip_address'] ?? '';
        $port = (int)($_POST['port'] ?? 4370);
        $io = $_POST['io_address'] ?? '';
        $serial = $_POST['serial_number'] ?? '';
        if ($name && $ip) {
            $stmt = db()->prepare("INSERT INTO hr_biometric_devices (device_name, ip_address, port, io_address, serial_number) VALUES (?, ?, ?, ?, ?)");
            $stmt->execute([$name, $ip, $port, $io, $serial]);
            $message = "Device added successfully!";
        }
    }
    if (isset($_POST['edit_biometric_device'])) {
        $id = (int)$_POST['id'];
        $name = $_POST['device_name'] ?? '';
        $ip = $_POST['ip_address'] ?? '';
        $port = (int)($_POST['port'] ?? 4370);
        $io = $_POST['io_address'] ?? '';
        $serial = $_POST['serial_number'] ?? '';
        if ($id && $name && $ip) {
            $stmt = db()->prepare("UPDATE hr_biometric_devices SET device_name = ?, ip_address = ?, port = ?, io_address = ?, serial_number = ? WHERE id = ?");
            $stmt->execute([$name, $ip, $port, $io, $serial, $id]);
            $message = "Device updated successfully!";
        }
    }
    if (isset($_POST['delete_biometric_device'])) {
        $id = (int)$_POST['id'];
        if ($id) {
            $stmt = db()->prepare("DELETE FROM hr_biometric_devices WHERE id = ?");
            $stmt->execute([$id]);
            $message = "Device deleted successfully!";
        }
    }

    if (isset($_POST['pull_biometric_data'])) {
        $devices = db()->query("SELECT * FROM hr_biometric_devices WHERE status = 'active'")->fetchAll();
        if (empty($devices)) {
            $message = "No active biometric devices found to pull data from.";
        } else {
            // Simulation of pulling data from multiple devices
            $employees = db()->query("SELECT id, biometric_id FROM hr_employees WHERE biometric_id IS NOT NULL")->fetchAll();
            $pulled_count = 0;
            $device_count = 0;
            $date = date('Y-m-d');
            
            foreach ($devices as $device) {
                $device_pulled = 0;
                foreach ($employees as $emp) {
                    // Randomly simulate logs for each employee for this device
                    if (rand(0, 1)) {
                        $check_in = $date . ' ' . str_pad((string)rand(7, 9), 2, '0', STR_PAD_LEFT) . ':' . str_pad((string)rand(0, 59), 2, '0', STR_PAD_LEFT) . ':00';
                        $check_out = $date . ' ' . str_pad((string)rand(16, 18), 2, '0', STR_PAD_LEFT) . ':' . str_pad((string)rand(0, 59), 2, '0', STR_PAD_LEFT) . ':00';
                        
                        // Log check-in
                        $stmt = db()->prepare("INSERT INTO hr_biometric_logs (biometric_id, device_id, employee_id, timestamp, type) VALUES (?, ?, ?, ?, 'check_in')");
                        $stmt->execute([$emp['biometric_id'], $device['id'], $emp['id'], $check_in]);
                        
                        // Log check-out
                        $stmt = db()->prepare("INSERT INTO hr_biometric_logs (biometric_id, device_id, employee_id, timestamp, type) VALUES (?, ?, ?, ?, 'check_out')");
                        $stmt->execute([$emp['biometric_id'], $device['id'], $emp['id'], $check_out]);
                        
                        $device_pulled += 2;
                        $pulled_count += 2;
                        
                        $in_time = date('H:i:s', strtotime($check_in));
                        $out_time = date('H:i:s', strtotime($check_out));
                        
                        // Update attendance record (earliest in, latest out)
                        $stmt = db()->prepare("INSERT INTO hr_attendance (employee_id, attendance_date, status, clock_in, clock_out) 
                                               VALUES (?, ?, 'present', ?, ?) 
                                               ON DUPLICATE KEY UPDATE status = 'present',
                                                                       clock_in = IF(clock_in IS NULL OR ? < clock_in, ?, clock_in), 
                                                                       clock_out = IF(clock_out IS NULL OR ? > clock_out, ?, clock_out)");
                        $stmt->execute([$emp['id'], $date, $in_time, $out_time, $in_time, $in_time, $out_time, $out_time]);
                    }
                }
                db()->prepare("UPDATE hr_biometric_devices SET last_sync = CURRENT_TIMESTAMP WHERE id = ?")->execute([$device['id']]);
                $device_count++;
            }
            $message = "Successfully synced $device_count devices and pulled $pulled_count records.";
        }
    }

    if (isset($_POST['test_device_connection'])) {
        $id = (int)$_POST['id'];
        $device = db()->prepare("SELECT * FROM hr_biometric_devices WHERE id = ?");
        $device->execute([$id]);
        $d = $device->fetch();
        if ($d) {
            // Simulated connection check
            $message = "Connection to device '{$d['device_name']}' ({$d['ip_address']}) was successful! (Simulated)";
        }
    }

    // --- User & Role Groups Handlers ---
    if (isset($_POST['add_role_group'])) {
        $name = $_POST['name'] ?? '';
        $permissions = isset($_POST['permissions']) ? $_POST['permissions'] : [];
        if ($name) {
            try {
                $db = db();
                $db->beginTransaction();
                $stmt = $db->prepare("INSERT INTO role_groups (name) VALUES (?)");
                $stmt->execute([$name]);
                $role_id = $db->lastInsertId();
                
                if (!empty($permissions)) {
                    $stmtPerm = $db->prepare("INSERT INTO role_permissions (role_id, permission) VALUES (?, ?)");
                    foreach ($permissions as $p) {
                        $stmtPerm->execute([$role_id, $p]);
                    }
                }
                $db->commit();
                $message = "Role Group added successfully!";
            } catch (PDOException $e) {
                if ($db->inTransaction()) $db->rollBack();
                $message = "Error adding role group: " . $e->getMessage();
            }
        }
    }

        if (isset($_POST['edit_role_group'])) {
        $id = (int)$_POST['id'];
        $name = $_POST['name'] ?? '';
        $permissions = isset($_POST['permissions']) ? $_POST['permissions'] : [];
        if ($id && $name) {
            try {
                $db = db();
                $db->beginTransaction();
                $stmt = $db->prepare("UPDATE role_groups SET name = ? WHERE id = ?");
                $stmt->execute([$name, $id]);
                
                // Refresh permissions
                $stmtDel = $db->prepare("DELETE FROM role_permissions WHERE role_id = ?");
                $stmtDel->execute([$id]);
                
                if (!empty($permissions)) {
                    $stmtPerm = $db->prepare("INSERT INTO role_permissions (role_id, permission) VALUES (?, ?)");
                    foreach ($permissions as $p) {
                        $stmtPerm->execute([$id, $p]);
                    }
                }
                $db->commit();
                $message = "Role Group updated successfully!";
            } catch (PDOException $e) {
                if ($db->inTransaction()) $db->rollBack();
                $message = "Error updating role group: " . $e->getMessage();
            }
        }
    }
    if (isset($_POST['delete_role_group'])) {
        $id = (int)$_POST['id'];
        if ($id) {
            $stmt = db()->prepare("DELETE FROM role_groups WHERE id = ?");
            $stmt->execute([$id]);
            $message = "Role Group deleted successfully!";
        }
    }
        
    // --- POS Devices Handlers ---
    if (isset($_POST['add_pos_device'])) {
        $name = $_POST['device_name'] ?? '';
        $type = $_POST['device_type'] ?? 'scale';
        $conn = $_POST['connection_type'] ?? 'usb';
        $ip = $_POST['ip_address'] ?? '';
        $port = $_POST['port'] ? (int)$_POST['port'] : null;
        $baud = $_POST['baud_rate'] ? (int)$_POST['baud_rate'] : null;
        if ($name) {
            $stmt = db()->prepare("INSERT INTO pos_devices (device_name, device_type, connection_type, ip_address, port, baud_rate) VALUES (?, ?, ?, ?, ?, ?)");
            $stmt->execute([$name, $type, $conn, $ip, $port, $baud]);
            redirectWithMessage("Device added successfully!", "index.php?page=scale_devices");
        }
    }
    if (isset($_POST['edit_pos_device'])) {
        $id = (int)$_POST['id'];
        $name = $_POST['device_name'] ?? '';
        $type = $_POST['device_type'] ?? 'scale';
        $conn = $_POST['connection_type'] ?? 'usb';
        $ip = $_POST['ip_address'] ?? '';
        $port = $_POST['port'] ? (int)$_POST['port'] : null;
        $baud = $_POST['baud_rate'] ? (int)$_POST['baud_rate'] : null;
        $status = $_POST['status'] ?? 'active';
        if ($id && $name) {
            $stmt = db()->prepare("UPDATE pos_devices SET device_name = ?, device_type = ?, connection_type = ?, ip_address = ?, port = ?, baud_rate = ?, status = ? WHERE id = ?");
            $stmt->execute([$name, $type, $conn, $ip, $port, $baud, $status, $id]);
            redirectWithMessage("Device updated successfully!", "index.php?page=scale_devices");
        }
    }
    if (isset($_POST['delete_pos_device'])) {
        $id = (int)$_POST['id'];
        if ($id) {
            $stmt = db()->prepare("DELETE FROM pos_devices WHERE id = ?");
            $stmt->execute([$id]);
            redirectWithMessage("Device deleted successfully!", "index.php?page=scale_devices");
        }
    }

    if (isset($_POST['update_profile'])) {
        $id = $_SESSION['user_id'];
        $username = $_POST['username'] ?? '';
        $email = $_POST['email'] ?? '';
        $phone = $_POST['phone'] ?? '';
        
        if ($id && $username) {
            $stmt = db()->prepare("UPDATE users SET username = ?, email = ?, phone = ? WHERE id = ?");
            $stmt->execute([$username, $email, $phone, $id]);
            $_SESSION['username'] = $username;
            
            if (!empty($_POST['password'])) {
                $hashed_password = password_hash($_POST['password'], PASSWORD_DEFAULT);
                $stmt = db()->prepare("UPDATE users SET password = ? WHERE id = ?");
                $stmt->execute([$hashed_password, $id]);
            }
            
            if (isset($_FILES['profile_pic']) && $_FILES['profile_pic']['error'] === 0) {
                $ext = pathinfo($_FILES['profile_pic']['name'], PATHINFO_EXTENSION);
                $filename = 'uploads/profile_' . $id . '_' . time() . '.' . $ext;
                if (!is_dir('uploads')) mkdir('uploads', 0777, true);
                if (move_uploaded_file($_FILES['profile_pic']['tmp_name'], $filename)) {
                    $stmt = db()->prepare("UPDATE users SET profile_pic = ? WHERE id = ?");
                    $stmt->execute([$filename, $id]);
                    $_SESSION['profile_pic'] = $filename;
                }
            }
            redirectWithMessage("Profile updated successfully!", "index.php?page=my_profile");
        }
    }

    if (isset($_POST['update_settings'])) {
        if (can('settings_view')) {
            $db = db();
            if (isset($_POST['settings']) && is_array($_POST['settings'])) {
                $settings = $_POST['settings'];
                $settings['weight_barcode_mode'] = in_array(($settings['weight_barcode_mode'] ?? 'weight'), ['weight', 'price'], true) ? $settings['weight_barcode_mode'] : 'weight';
                $licenseAppName = trim((string)($settings['license_app_name'] ?? ''));
                $settings['license_app_name'] = $licenseAppName !== '' ? substr($licenseAppName, 0, 190) : '';
                $licenseAppSlug = trim((string)($settings['license_app_slug'] ?? ''));
                $settings['license_app_slug'] = $licenseAppSlug !== '' ? LicenseService::sanitizeAppSlug($licenseAppSlug, true) : '';
                $prefixStart = (int)($settings['weight_barcode_prefix_start'] ?? 20);
                $prefixEnd = (int)($settings['weight_barcode_prefix_end'] ?? 29);
                if ($prefixStart < 20 || $prefixStart > 29) $prefixStart = 20;
                if ($prefixEnd < 20 || $prefixEnd > 29) $prefixEnd = 29;
                if ($prefixStart > $prefixEnd) {
                    [$prefixStart, $prefixEnd] = [$prefixEnd, $prefixStart];
                }
                $settings['weight_barcode_prefix_start'] = (string)$prefixStart;
                $settings['weight_barcode_prefix_end'] = (string)$prefixEnd;

                foreach ($settings as $key => $value) {
                    $stmt = $db->prepare("INSERT INTO settings (`key`, `value`) VALUES (?, ?) ON DUPLICATE KEY UPDATE `value` = ?");
                    $stmt->execute([$key, $value, $value]);
                }
            }
            
            // Handle file uploads
            $files = ['company_logo', 'favicon', 'manager_signature', 'display_slide_1', 'display_slide_2', 'display_slide_3'];
            foreach ($files as $file_key) {
                if (isset($_FILES[$file_key]) && $_FILES[$file_key]['error'] === 0) {
                    $ext = pathinfo($_FILES[$file_key]['name'], PATHINFO_EXTENSION);
                    $filename = 'uploads/' . $file_key . '_' . time() . '.' . $ext;
                    if (!is_dir('uploads')) mkdir('uploads', 0777, true);
                    if (move_uploaded_file($_FILES[$file_key]['tmp_name'], $filename)) {
                        $stmt = $db->prepare("INSERT INTO settings (`key`, `value`) VALUES (?, ?) ON DUPLICATE KEY UPDATE `value` = ?");
                        $stmt->execute([$file_key, $filename, $filename]);
                    }
                }
            }
            redirectWithMessage("Settings updated successfully!", "index.php?page=settings");
        }
    }

    // --- Backup Handlers ---
    if (isset($_POST['create_backup'])) {
        if (can('users_view')) { // Admin check
            $res = BackupService::createBackup();
            $message = $res['success'] ? "Backup created: " . $res['file'] : "Error: " . $res['error'];
        }
    }

    if (isset($_POST['restore_backup'])) {
        if (can('users_view')) {
            $filename = $_POST['filename'] ?? '';
            $res = BackupService::restoreBackup($filename);
            redirectWithMessage($res['success'] ? "Database restored successfully from $filename!" : "Error: " . $res['error'], "index.php?page=backups");
        }
    }

    if (isset($_POST['delete_backup'])) {
        if (can('users_view')) {
            $filename = basename($_POST['filename'] ?? '');
            if (unlink(__DIR__ . '/backups/' . $filename)) {
                redirectWithMessage("Backup deleted successfully.", "index.php?page=backups");
            } else {
                redirectWithMessage("Error deleting backup.", "index.php?page=backups");
            }
        }
    }

    if (isset($_POST['save_backup_settings'])) {
            $limit = (int)($_POST['backup_limit'] ?? 5);
            $auto = $_POST['backup_auto_enabled'] ?? '0';
            $time = $_POST['backup_time'] ?? '00:00';
            
            $stmt = $db->prepare("INSERT INTO settings (`key`, `value`) VALUES ('backup_limit', ?), ('backup_auto_enabled', ?), ('backup_time', ?) ON DUPLICATE KEY UPDATE `value` = VALUES(`value`)");
            $stmt->execute([$limit, $auto, $time]);
            redirectWithMessage("Backup settings updated.", "index.php?page=backups");
    }
    
    if (isset($_GET['download_backup'])) {
        $filename = basename($_GET['download_backup']);
        $filepath = __DIR__ . '/backups/' . $filename;
        if (file_exists($filepath)) {
            header('Content-Description: File Transfer');
            header('Content-Type: application/octet-stream');
            header('Content-Disposition: attachment; filename="' . $filename . '"');
            header('Expires: 0');
            header('Cache-Control: must-revalidate');
            header('Pragma: public');
            header('Content-Length: ' . filesize($filepath));
            readfile($filepath);
            exit;
        }
    }

    // --- Cash Register & Session Handlers ---
    if (isset($_POST['add_cash_register'])) {
        $name = $_POST['name'] ?? '';
        if ($name) {
            // Check license limit
            $allowed = LicenseService::getAllowedActivations();
            $stmt = db()->query("SELECT COUNT(*) FROM cash_registers");
            $current_count = (int)$stmt->fetchColumn();

            if ($current_count >= $allowed) {
                $message = "Error: Activation Limit Reached. Your license only allows $allowed register(s).";
            } else {
                $stmt = db()->prepare("INSERT INTO cash_registers (name) VALUES (?)");
                $stmt->execute([$name]);
                redirectWithMessage("Cash Register added successfully!", "index.php?page=cash_registers");
            }
        }
    }
    if (isset($_POST['edit_cash_register'])) {
        $id = (int)$_POST['id'];
        $name = $_POST['name'] ?? '';
        $status = $_POST['status'] ?? 'active';
        if ($id && $name) {
            $stmt = db()->prepare("UPDATE cash_registers SET name = ?, status = ? WHERE id = ?");
            $stmt->execute([$name, $status, $id]);
            redirectWithMessage("Cash Register updated successfully!", "index.php?page=cash_registers");
        }
    }
    if (isset($_POST['delete_cash_register'])) {
        $id = (int)$_POST['id'];
        if ($id) {
            $stmt = db()->prepare("DELETE FROM cash_registers WHERE id = ?");
            $stmt->execute([$id]);
            redirectWithMessage("Cash Register deleted successfully!", "index.php?page=cash_registers");
        }
    }

    if (isset($_POST['open_register'])) {
        $register_id = (int)$_POST['register_id'];
        $user_id = $_SESSION['user_id'];
        $opening_balance = (float)$_POST['opening_balance'];
        
        // Check if user already has an open session
        $check = db()->prepare("SELECT id FROM register_sessions WHERE user_id = ? AND status = 'open'");
        $check->execute([$user_id]);
        if ($check->fetch()) {
            $message = "Error: You already have an open register session.";
        } else {
            $stmt = db()->prepare("INSERT INTO register_sessions (register_id, user_id, opening_balance, status) VALUES (?, ?, ?, 'open')");
            $stmt->execute([$register_id, $user_id, $opening_balance]);
            $_SESSION['register_session_id'] = db()->lastInsertId();
            redirectWithMessage("Register opened successfully!", "index.php?page=pos");
        }
    }

    // Removed conflicting close_register handler


    if (isset($_POST['delete_backup'])) {
        if (can('users_view')) {
            $filename = basename($_POST['filename'] ?? '');
            if (unlink(__DIR__ . '/backups/' . $filename)) {
                $message = "Backup deleted successfully.";
            } else {
                $message = "Error deleting backup.";
            }
        }
    }

    if (isset($_POST['save_backup_settings'])) {
            $limit = (int)($_POST['backup_limit'] ?? 5);
            $auto = $_POST['backup_auto_enabled'] ?? '0';
            $time = $_POST['backup_time'] ?? '00:00';
            
            $stmt = $db->prepare("INSERT INTO settings (`key`, `value`) VALUES ('backup_limit', ?), ('backup_auto_enabled', ?), ('backup_time', ?) ON DUPLICATE KEY UPDATE `value` = VALUES(`value`)");
            $stmt->execute([$limit, $auto, $time]);
            $message = "Backup settings updated.";
    }
    
    if (isset($_GET['download_backup'])) {
        $filename = basename($_GET['download_backup']);
        $filepath = __DIR__ . '/backups/' . $filename;
        if (file_exists($filepath)) {
            header('Content-Description: File Transfer');
            header('Content-Type: application/octet-stream');
            header('Content-Disposition: attachment; filename="' . $filename . '"');
            header('Expires: 0');
            header('Cache-Control: must-revalidate');
            header('Pragma: public');
            header('Content-Length: ' . filesize($filepath));
            readfile($filepath);
            exit;
        }
    }

    // --- Cash Register & Session Handlers ---
    if (isset($_POST['add_cash_register'])) {
        $name = $_POST['name'] ?? '';
        if ($name) {
            // Check license limit
            $allowed = LicenseService::getAllowedActivations();
            $stmt = db()->query("SELECT COUNT(*) FROM cash_registers");
            $current_count = (int)$stmt->fetchColumn();

            if ($current_count >= $allowed) {
                $message = "Error: Activation Limit Reached. Your license only allows $allowed register(s).";
            } else {
                $stmt = db()->prepare("INSERT INTO cash_registers (name) VALUES (?)");
                $stmt->execute([$name]);
                $message = "Cash Register added successfully!";
            }
        }
    }
    if (isset($_POST['edit_cash_register'])) {
        $id = (int)$_POST['id'];
        $name = $_POST['name'] ?? '';
        $status = $_POST['status'] ?? 'active';
        if ($id && $name) {
            $stmt = db()->prepare("UPDATE cash_registers SET name = ?, status = ? WHERE id = ?");
            $stmt->execute([$name, $status, $id]);
            $message = "Cash Register updated successfully!";
        }
    }
    if (isset($_POST['delete_cash_register'])) {
        $id = (int)$_POST['id'];
        if ($id) {
            $stmt = db()->prepare("DELETE FROM cash_registers WHERE id = ?");
            $stmt->execute([$id]);
            $message = "Cash Register deleted successfully!";
        }
    }

    if (isset($_POST['open_register'])) {
        $register_id = (int)$_POST['register_id'];
        $user_id = $_SESSION['user_id'];
        $opening_balance = (float)$_POST['opening_balance'];
        
        // Check if user already has an open session
        $check = db()->prepare("SELECT id FROM register_sessions WHERE user_id = ? AND status = 'open'");
        $check->execute([$user_id]);
        if ($check->fetch()) {
            $message = "Error: You already have an open register session.";
        } else {
            $stmt = db()->prepare("INSERT INTO register_sessions (register_id, user_id, opening_balance, status) VALUES (?, ?, ?, 'open')");
            $stmt->execute([$register_id, $user_id, $opening_balance]);
            $_SESSION['register_session_id'] = db()->lastInsertId();
            $message = "Register opened successfully!";
            header("Location: index.php?page=pos");
            exit;
        }
    }

    if (isset($_POST['close_register'])) {
        $session_id = (int)$_POST['session_id'];
        $cash_in_hand = (float)$_POST['cash_in_hand'];
        $notes = $_POST['notes'] ?? '';
        $redirect_to = $_POST['redirect_to'] ?? 'dashboard';
        
        // Calculate expected closing balance
        $session = db()->prepare("SELECT opening_balance FROM register_sessions WHERE id = ?");
        $session->execute([$session_id]);
        $opening = (float)$session->fetchColumn();
        
        // Unified calculation logic (POS Transactions + Invoices)
        // Note: POS transactions are saved in invoices table with is_pos=1
        $sales_sql = "SELECT SUM(p.amount) FROM payments p JOIN invoices i ON p.invoice_id = i.id WHERE i.register_session_id = ? AND i.status = 'paid' AND i.is_pos = 1 AND LOWER(p.payment_method) = 'cash'";
        
        $sales_stmt = db()->prepare($sales_sql);
        $sales_stmt->execute([$session_id]);
        $cash_sales = (float)$sales_stmt->fetchColumn();
        
        $expected = $opening + $cash_sales;
        
        $stmt = db()->prepare("UPDATE register_sessions SET closing_balance = ?, cash_in_hand = ?, closed_at = CURRENT_TIMESTAMP, status = 'closed', notes = ? WHERE id = ?");
        $stmt->execute([$expected, $cash_in_hand, $notes, $session_id]);
        
        unset($_SESSION['register_session_id']);
        $message = "Register closed successfully!";
        
        if ($redirect_to === 'dashboard') {
             // For POS users, we want dashboard
             header("Location: index.php?page=dashboard");
        } else {
             // For Admin, we stay on sessions page
             redirectWithMessage($message, "index.php?page=" . urlencode($redirect_to));
        }
        exit;
    }


// Routing & Data Fetching
$page = $_GET['page'] ?? 'dashboard';

// Permission map for pages
$page_permissions = [
    'pos' => 'pos_view',
    'sales' => 'sales_view',
    'sales_returns' => 'sales_returns_view',
    'purchases' => 'purchases_view',
    'purchase_returns' => 'purchase_returns_view',
    'quotations' => 'quotations_view',
    'lpos' => 'lpos_view',
    'accounting' => 'accounting_view',
    'expense_categories' => 'expense_categories_view',
    'expenses' => 'expenses_view',
    'expense_report' => 'expenses_view',
    'items' => 'items_view',
    'categories' => 'categories_view',
    'units' => 'units_view',
    'customers' => 'customers_view',
    'suppliers' => 'suppliers_view',
    'customer_statement' => 'customer_statement_view',
    'supplier_statement' => 'supplier_statement_view',
    'cashflow_report' => 'cashflow_report_view',
    'expiry_report' => 'expiry_report_view',
    'low_stock_report' => 'low_stock_report_view',
    'loyalty_history' => 'loyalty_history_view',
    'payment_methods' => 'payment_methods_view',
    'settings' => 'settings_view',
    'devices' => 'devices_view',
    'hr_departments' => 'hr_departments_view',
    'hr_employees' => 'hr_employees_view',
    'hr_attendance' => 'hr_attendance_view',
    'hr_payroll' => 'hr_payroll_view',
    'role_groups' => 'role_groups_view',
    'users' => 'users_view',
    'scale_devices' => 'scale_devices_view',
    'customer_display_settings' => 'customer_display_settings_view',
    'backups' => 'backups_view',
    'logs' => 'logs_view',
    'cash_registers' => 'cash_registers_view',
    'register_sessions' => 'register_sessions_view',
];

if (isset($page_permissions[$page]) && !can($page_permissions[$page])) {
    $page = 'dashboard'; 
    $message = "Access Denied: You don't have permission to view that module.";
}

$currTitle = ['en' => 'Dashboard', 'ar' => 'لوحة القيادة'];
$titles = [
    'dashboard' => ['en' => 'Dashboard', 'ar' => 'لوحة القيادة'],
    'pos' => ['en' => 'Point of Sale', 'ar' => 'نقطة البيع'],
    'sales' => ['en' => 'Sales', 'ar' => 'المبيعات'],
    'sales_returns' => ['en' => 'Sales Returns', 'ar' => 'مرتجعات المبيعات'],
    'purchases' => ['en' => 'Purchases', 'ar' => 'المشتريات'],
    'purchase_returns' => ['en' => 'Purchase Returns', 'ar' => 'مرتجعات المشتريات'],
    'quotations' => ['en' => 'Quotations', 'ar' => 'عروض الأسعار'],
    'lpos' => ['en' => 'LPOs', 'ar' => 'أوامر الشراء'],
    'accounting' => ['en' => 'Accounting', 'ar' => 'المحاسبة'],
    'expense_categories' => ['en' => 'Expense Categories', 'ar' => 'فئات المصروفات'],
    'expenses' => ['en' => 'Expenses', 'ar' => 'المصروفات'],
    'expense_report' => ['en' => 'Expense Report', 'ar' => 'تقرير المصروفات'],
    'items' => ['en' => 'Items', 'ar' => 'الأصناف'],
    'categories' => ['en' => 'Categories', 'ar' => 'الفئات'],
    'units' => ['en' => 'Units', 'ar' => 'الوحدات'],
    'customers' => ['en' => 'Customers', 'ar' => 'العملاء'],
    'suppliers' => ['en' => 'Suppliers', 'ar' => 'الموردين'],
    'customer_statement' => ['en' => 'Customer Statement', 'ar' => 'كشف حساب عميل'],
    'supplier_statement' => ['en' => 'Supplier Statement', 'ar' => 'كشف حساب مورد'],
    'cashflow_report' => ['en' => 'Cashflow Report', 'ar' => 'تقرير التدفق النقدي'],
    'expiry_report' => ['en' => 'Expiry Report', 'ar' => 'تقرير الصلاحية'],
    'low_stock_report' => ['en' => 'Low Stock Report', 'ar' => 'تقرير المخزون المنخفض'],
    'loyalty_history' => ['en' => 'Loyalty History', 'ar' => 'سجل الولاء'],
    'payment_methods' => ['en' => 'Payment Methods', 'ar' => 'طرق الدفع'],
    'settings' => ['en' => 'Settings', 'ar' => 'الإعدادات'],
    'devices' => ['en' => 'Biometric Devices', 'ar' => 'أجهزة البصمة'],
    'hr_departments' => ['en' => 'Departments', 'ar' => 'الأقسام'],
    'hr_employees' => ['en' => 'Employees', 'ar' => 'الموظفين'],
    'hr_attendance' => ['en' => 'Attendance', 'ar' => 'الحضور'],
    'hr_payroll' => ['en' => 'Payroll', 'ar' => 'الرواتب'],
    'role_groups' => ['en' => 'Roles & Permissions', 'ar' => 'الأدوار والصلاحيات'],
    'users' => ['en' => 'Users', 'ar' => 'المستخدمين'],
    'cash_registers' => ['en' => 'Cash Registers', 'ar' => 'صناديق الكاشير'],
    'register_sessions' => ['en' => 'Register Sessions', 'ar' => 'جلسات الصناديق']
];
if (isset($titles[$page])) {
    $currTitle = $titles[$page];
}

$data = [
    'payment_methods' => [],
    'role_groups' => [],
    'users' => [],
    'expiry_items' => [],
    'low_stock_items' => [],
    'items' => [],
    'cash_transactions' => [],
    'monthly_sales' => [],
    'yearly_sales' => [],
    'opening_balance' => 0,
    'stats' => [
        'expired_items' => 0,
        'near_expiry_items' => 0,
        'low_stock_items_count' => 0,
        'total_sales' => 0,
        'total_received' => 0,
        'total_receivable' => 0,
        'total_purchases' => 0,
    ],
    'settings' => [],
];

$permission_groups = [
    'General' => ['dashboard' => __('dashboard')],
    'Inventory' => [
        'items' => __('items'),
        'categories' => __('categories'),
        'units' => __('units')
    ],
    'Customers' => [
        'customers' => __('customers')
    ],
    'Suppliers' => [
        'suppliers' => __('suppliers')
    ],
    'POS' => [
        'pos' => __('pos')
    ],
    'Sales' => [
        'sales' => __('sales'),
        'sales_returns' => __('sales_returns'),
        'quotations' => __('quotations')
    ],
    'Purchases' => [
        'purchases' => __('purchases'),
        'lpos' => __('lpos'),
        'purchase_returns' => __('purchase_returns')
    ],
    'Expenses' => [
        'expense_categories' => __('expense_categories'),
        'expenses' => __('expenses')
    ],
    'Accounting' => [
        'accounting' => __('accounting'),
        'trial_balance' => __('trial_balance'),
        'profit_loss' => __('profit_loss'),
        'balance_sheet' => __('balance_sheet'),
        'vat_report' => __('vat_report')
    ],
    'HR' => [
        'hr_departments' => __('departments'),
        'hr_employees' => __('employees'),
        'hr_attendance' => __('attendance'),
        'hr_payroll' => __('payroll')
    ],
    'Reports' => [
        'customer_statement' => __('customer_statement'),
        'supplier_statement' => __('supplier_statement'),
        'expense_report' => __('expense_report'),
        'cashflow_report' => __('cashflow_report'),
        'expiry_report' => __('expiry_report'),
        'low_stock_report' => __('low_stock_report'),
        'loyalty_history' => __('loyalty_history'),
        'register_sessions' => __('register_sessions')
    ],
    'Settings' => [
        'payment_methods' => __('payment_methods'),
        'devices' => __('devices'),
        'settings' => __('settings')
    ],
    'Administration' => [
        'role_groups' => __('role_groups'),
        'users' => __('users'),
        'cash_registers' => __('cash_registers'),
        'logs' => 'System Logs'
    ]
];


if ($page === 'export') {
    $type = $_GET['type'] ?? 'sales';
    $format = $_GET['format'] ?? 'csv';
    $filename = $type . "_export_" . date('Y-m-d') . ($format === 'excel' ? ".xls" : ".csv");
    
    if ($format === 'excel') {
        header('Content-Type: application/vnd.ms-excel; charset=utf-8');
        header('Content-Disposition: attachment; filename=' . $filename);
        echo "<table border='1'>";
    } else {
        header('Content-Type: text/csv; charset=utf-8');
        header('Content-Disposition: attachment; filename=' . $filename);
        $output = fopen('php://output', 'w');
        // Add UTF-8 BOM for Excel
        fprintf($output, chr(0xEF).chr(0xBB).chr(0xBF));
    }

    $headers = [];
    $rows = [];

    if ($type === 'sales' || $type === 'purchases') {
        $table = ($type === 'sales') ? 'invoices' : 'purchases';
        $cust_table = ($type === 'sales') ? 'customers' : 'suppliers';
        $cust_col = ($type === 'sales') ? 'customer_id' : 'supplier_id';
        
        $where = ["1=1"];
        $params = [];
        if (!empty($_GET['search'])) {
            $s = $_GET['search'];
            $clean_id = preg_replace('/[^0-9]/', '', $s);
            if ($clean_id !== '') {
                $where[] = "(v.id LIKE ? OR c.name LIKE ? OR v.id = ?)";
                $params[] = "%$s%";
                $params[] = "%$s%";
                $params[] = $clean_id;
            } else {
                $where[] = "(v.id LIKE ? OR c.name LIKE ?)";
                $params[] = "%$s%";
                $params[] = "%$s%";
            }
        }
        if (!empty($_GET['customer_id'])) { $where[] = "v.$cust_col = ?"; $params[] = $_GET['customer_id']; }
        if (!empty($_GET['start_date'])) { $where[] = "v.invoice_date >= ?"; $params[] = $_GET['start_date']; }
        if (!empty($_GET['end_date'])) { $where[] = "v.invoice_date <= ?"; $params[] = $_GET['end_date']; }
        $whereSql = implode(" AND ", $where);
        
        $stmt = db()->prepare("SELECT v.id, c.name as customer_name, v.invoice_date, v.payment_type, v.status, v.total_with_vat, v.paid_amount, (v.total_with_vat - v.paid_amount) as balance 
                               FROM $table v LEFT JOIN $cust_table c ON v.$cust_col = c.id 
                               WHERE $whereSql ORDER BY v.id DESC");
        $stmt->execute($params);
        $headers = ['Invoice ID', 'Customer/Supplier', 'Date', 'Payment', 'Status', 'Total', 'Paid', 'Balance'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'customers' || $type === 'suppliers') {
        $table = ($type === 'suppliers') ? 'suppliers' : 'customers';
        $taxColumn = entity_tax_column($table);
        $where = ["1=1"];
        $params = [];
        if (!empty($_GET['search'])) {
            $taxSearch = $taxColumn !== null ? " OR $taxColumn LIKE ?" : '';
            $where[] = "(name LIKE ? OR email LIKE ? OR phone LIKE ?$taxSearch)";
            $params[] = "%{$_GET['search']}%";
            $params[] = "%{$_GET['search']}%";
            $params[] = "%{$_GET['search']}%";
            if ($taxColumn !== null) {
                $params[] = "%{$_GET['search']}%";
            }
        }
        if (!empty($_GET['start_date'])) { $where[] = "DATE(created_at) >= ?"; $params[] = $_GET['start_date']; }
        if (!empty($_GET['end_date'])) { $where[] = "DATE(created_at) <= ?"; $params[] = $_GET['end_date']; }
        $whereSql = implode(" AND ", $where);
        $taxSelect = $taxColumn !== null ? "$taxColumn AS tax_id" : "'' AS tax_id";
        $stmt = db()->prepare("SELECT id, name, email, phone, $taxSelect, balance, created_at FROM $table WHERE $whereSql ORDER BY id DESC");
        $stmt->execute($params);
        $headers = ['ID', 'Name', 'Email', 'Phone', 'Tax ID', 'Balance', 'Created At'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'items') {
        $where = ["1=1"];
        $params = [];
        if (!empty($_GET['search'])) { $where[] = "(i.name_en LIKE ? OR i.name_ar LIKE ? OR i.sku LIKE ?)"; $params[] = "%{$_GET['search']}%"; $params[] = "%{$_GET['search']}%"; $params[] = "%{$_GET['search']}%"; }
        $whereSql = implode(" AND ", $where);
        $stmt = db()->prepare("SELECT i.sku, i.name_en, i.name_ar, c.name_en as category, i.purchase_price, i.sale_price, i.stock_quantity, i.vat_rate 
                               FROM stock_items i LEFT JOIN stock_categories c ON i.category_id = c.id 
                               WHERE $whereSql ORDER BY i.id DESC");
        $stmt->execute($params);
        $headers = ['SKU', 'Name (EN)', 'Name (AR)', 'Category', 'Purchase Price', 'Sale Price', 'Quantity', 'VAT %'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'expenses') {
        $where = ["1=1"];
        $params = [];
        $stmt = db()->prepare("SELECT e.id, c.name_en as category, e.amount, e.expense_date, e.reference_no, e.description 
                               FROM expenses e JOIN expense_categories c ON e.category_id = c.id 
                               ORDER BY e.expense_date DESC");
        $stmt->execute();
        $headers = ['ID', 'Category', 'Amount', 'Date', 'Reference', 'Description'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'quotations') {
        $stmt = db()->prepare("SELECT q.id, c.name as customer_name, q.quotation_date, q.total_with_vat, q.status 
                               FROM quotations q JOIN customers c ON q.customer_id = c.id 
                               ORDER BY q.id DESC");
        $stmt->execute();
        $headers = ['Quotation #', 'Customer', 'Date', 'Total', 'Status'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'lpos') {
        $stmt = db()->prepare("SELECT q.id, s.name as supplier_name, q.lpo_date, q.total_with_vat, q.status 
                               FROM lpos q JOIN suppliers s ON q.supplier_id = s.id 
                               ORDER BY q.id DESC");
        $stmt->execute();
        $headers = ['LPO #', 'Supplier', 'Date', 'Total', 'Status'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'categories') {
        $stmt = db()->prepare("SELECT id, name_en, name_ar FROM stock_categories WHERE outlet_id = ? ORDER BY id DESC");
        $stmt->execute([current_outlet_id()]);
        $headers = ['ID', 'Name (EN)', 'Name (AR)'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'units') {
        $stmt = db()->prepare("SELECT id, name_en, name_ar FROM stock_units WHERE outlet_id = ? ORDER BY id DESC");
        $stmt->execute([current_outlet_id()]);
        $headers = ['ID', 'Name (EN)', 'Name (AR)'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'sales_returns') {
        $salesReturnReferenceColumn = sales_return_reference_column();
        $stmt = db()->query("SELECT sr.id, sr.`{$salesReturnReferenceColumn}` AS invoice_id, c.name as customer, sr.return_date, sr.total_amount FROM sales_returns sr LEFT JOIN customers c ON sr.customer_id = c.id ORDER BY sr.id DESC");
        $headers = ['Return ID', 'Invoice ID', 'Customer', 'Date', 'Amount'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'purchase_returns') {
        $purchaseReturnReferenceColumn = purchase_return_reference_column();
        $stmt = db()->query("SELECT pr.id, pr.`{$purchaseReturnReferenceColumn}` AS purchase_id, s.name as supplier, pr.return_date, pr.total_amount FROM purchase_returns pr LEFT JOIN suppliers s ON pr.supplier_id = s.id ORDER BY pr.id DESC");
        $headers = ['Return ID', 'Purchase ID', 'Supplier', 'Date', 'Amount'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'hr_employees') {
        $stmt = db()->query("SELECT e.id, e.name, d.name as department, e.position, e.salary, e.status FROM hr_employees e LEFT JOIN hr_departments d ON e.department_id = d.id ORDER BY e.id DESC");
        $headers = ['ID', 'Name', 'Department', 'Position', 'Salary', 'Status'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'hr_departments') {
        $stmt = db()->query("SELECT id, name FROM hr_departments ORDER BY id DESC");
        $headers = ['ID', 'Name'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'hr_attendance') {
        $stmt = db()->query("SELECT a.attendance_date, e.name, a.status, a.clock_in, a.clock_out FROM hr_attendance a JOIN hr_employees e ON a.employee_id = e.id ORDER BY a.attendance_date DESC, e.name ASC");
        $headers = ['Date', 'Employee', 'Status', 'In', 'Out'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'hr_payroll') {
        $stmt = db()->query("SELECT p.payroll_month, p.payroll_year, e.name, p.basic_salary, p.bonus, p.deductions, p.net_salary, p.status FROM hr_payroll p JOIN hr_employees e ON p.employee_id = e.id ORDER BY p.payroll_year DESC, p.payroll_month DESC");
        $headers = ['Month', 'Year', 'Employee', 'Salary', 'Bonus', 'Deductions', 'Net', 'Status'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    } elseif ($type === 'users') {
        $stmt = db()->query("SELECT u.id, u.username, u.email, g.name as role, u.status FROM users u LEFT JOIN role_groups g ON u.group_id = g.id ORDER BY u.id DESC");
        $headers = ['ID', 'Username', 'Email', 'Role', 'Status'];
        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) $rows[] = $row;
    }

    if ($format === 'excel') {
        echo "<tr>";
        foreach ($headers as $h) echo "<th>" . htmlspecialchars($h) . "</th>";
        echo "</tr>";
        foreach ($rows as $row) {
            echo "<tr>";
            foreach ($row as $val) echo "<td>" . htmlspecialchars((string)$val) . "</td>";
            echo "</tr>";
        }
        echo "</table>";
    } else {
        fputcsv($output, $headers);
        foreach ($rows as $row) fputcsv($output, $row);
        fclose($output);
    }
    exit;
}

// Global data for modals
$current_oid = current_outlet_id();
$stmt = db()->prepare("SELECT * FROM stock_categories WHERE outlet_id = ? ORDER BY name_en ASC");
$stmt->execute([$current_oid]);
$data['categories'] = $stmt->fetchAll();
$stmt = db()->prepare("SELECT * FROM stock_units WHERE outlet_id = ? ORDER BY name_en ASC");
$stmt->execute([$current_oid]);
$data['units'] = $stmt->fetchAll();
$stmt = db()->prepare("SELECT * FROM suppliers WHERE outlet_id = ? ORDER BY name ASC");
$stmt->execute([$current_oid]);
$data['suppliers'] = $stmt->fetchAll();
$data['accounts'] = db()->query("SELECT * FROM acc_accounts ORDER BY code ASC")->fetchAll();
$data['customers_list'] = db()->query("SELECT * FROM customers ORDER BY name ASC")->fetchAll();
$customers = $data['customers_list']; // For backward compatibility in some modals

$settings_raw = db()->query("SELECT * FROM settings")->fetchAll();
$data['settings'] = [];
foreach ($settings_raw as $s) {
    $data['settings'][$s['key']] = $s['value'];
}

// Fetch current outlet name
$oid = current_outlet_id();
if ($oid != -1) {
    $stmt = db()->prepare("SELECT name FROM outlets WHERE id = ?");
    $stmt->execute([$oid]);
    $outlet_name = $stmt->fetchColumn();
    if ($outlet_name) {
        $data['settings']['current_outlet_name'] = $outlet_name;
    }
}

$limit = isset($_GET["limit"]) ? max(5, (int)$_GET["limit"]) : 20;
$page_num = isset($_GET["p"]) ? (int)$_GET["p"] : 1;
if ($page_num < 1) $page_num = 1;
$offset = ($page_num - 1) * $limit;
switch ($page) {
    case 'suppliers':
        $supplierTaxColumn = entity_tax_column('suppliers');
        $where = ["outlet_id = " . current_outlet_id()];
        $params = [];
        if (!empty($_GET['search'])) {
            $taxSearch = $supplierTaxColumn !== null ? " OR $supplierTaxColumn LIKE ?" : '';
            $where[] = "(name LIKE ? OR email LIKE ? OR phone LIKE ?$taxSearch)";
            $params[] = "%{$_GET['search']}%";
            $params[] = "%{$_GET['search']}%";
            $params[] = "%{$_GET['search']}%";
            if ($supplierTaxColumn !== null) {
                $params[] = "%{$_GET['search']}%";
            }
        }
        if (!empty($_GET['start_date'])) {
            $where[] = "DATE(created_at) >= ?";
            $params[] = $_GET['start_date'];
        }
        if (!empty($_GET['end_date'])) {
            $where[] = "DATE(created_at) <= ?";
            $params[] = $_GET['end_date'];
        }
        $whereSql = implode(" AND ", $where);
        
        $countStmt = db()->prepare("SELECT COUNT(*) FROM suppliers WHERE $whereSql");
        $countStmt->execute($params);
        $total_records = (int)$countStmt->fetchColumn();
        $data['total_pages'] = ceil($total_records / $limit);
        $data['current_page'] = $page_num;

        $stmt = db()->prepare("SELECT * FROM suppliers WHERE $whereSql ORDER BY id DESC LIMIT $limit OFFSET $offset");
        $stmt->execute($params);
        $data['customers'] = $stmt->fetchAll(); // Keep 'customers' key for template compatibility if needed, or update template
        break;
    case 'customers':
        $customerTaxColumn = entity_tax_column('customers');
        $where = ["1=1"];
        $params = [];
        if (!empty($_GET['search'])) {
            $taxSearch = $customerTaxColumn !== null ? " OR $customerTaxColumn LIKE ?" : '';
            $where[] = "(name LIKE ? OR email LIKE ? OR phone LIKE ?$taxSearch)";
            $params[] = "%{$_GET['search']}%";
            $params[] = "%{$_GET['search']}%";
            $params[] = "%{$_GET['search']}%";
            if ($customerTaxColumn !== null) {
                $params[] = "%{$_GET['search']}%";
            }
        }
        if (!empty($_GET['start_date'])) {
            $where[] = "DATE(created_at) >= ?";
            $params[] = $_GET['start_date'];
        }
        if (!empty($_GET['end_date'])) {
            $where[] = "DATE(created_at) <= ?";
            $params[] = $_GET['end_date'];
        }
        $whereSql = implode(" AND ", $where);
        
        $countStmt = db()->prepare("SELECT COUNT(*) FROM customers WHERE $whereSql");
        $countStmt->execute($params);
        $total_records = (int)$countStmt->fetchColumn();
        $data['total_pages'] = ceil($total_records / $limit);
        $data['current_page'] = $page_num;

        $stmt = db()->prepare("SELECT * FROM customers WHERE $whereSql ORDER BY id DESC LIMIT $limit OFFSET $offset");
        $stmt->execute($params);
        $data['customers'] = $stmt->fetchAll();
        break;
    case 'categories':
        // Already fetched globally
        break;
    case 'units':
        // Already fetched globally
        break;
    case 'items':
        file_put_contents('debug.log', date('Y-m-d H:i:s') . " - Items case hit\n", FILE_APPEND);
        $where = ["i.outlet_id = " . current_outlet_id()];
        $params = [];
        if (!empty($_GET['search'])) {
            $where[] = "(i.name_en LIKE ? OR i.name_ar LIKE ? OR i.sku LIKE ?)";
            $params[] = "%{$_GET['search']}%";
            $params[] = "%{$_GET['search']}%";
            $params[] = "%{$_GET['search']}%";
        }
        $whereSql = implode(" AND ", $where);
        
        $countStmt = db()->prepare("SELECT COUNT(*) FROM stock_items i 
                                      LEFT JOIN stock_categories c ON i.category_id = c.id 
                                      LEFT JOIN stock_units u ON i.unit_id = u.id 
                                      LEFT JOIN suppliers s ON i.supplier_id = s.id WHERE $whereSql");
        $countStmt->execute($params);
        $total_records = (int)$countStmt->fetchColumn();
        $data['total_pages'] = ceil($total_records / $limit);
        $data['current_page'] = $page_num;

        $oid = current_outlet_id();
        $stmt = db()->prepare("SELECT i.*, i.stock_quantity, c.name_en as cat_en, c.name_ar as cat_ar, COALESCE(NULLIF(u.name_en, ''), u.short_name_en) as unit_en, COALESCE(NULLIF(u.name_ar, ''), u.short_name_ar, u.name_en, u.short_name_en) as unit_ar, s.name as supplier_name 
                                      FROM stock_items i 
                                      
                                      LEFT JOIN stock_categories c ON i.category_id = c.id 
                                      LEFT JOIN stock_units u ON i.unit_id = u.id 
                                      LEFT JOIN suppliers s ON i.supplier_id = s.id
                                      WHERE $whereSql
                                      ORDER BY i.id DESC LIMIT $limit OFFSET $offset");
        $stmt->execute($params);
        $data['items'] = $stmt->fetchAll();
        break;
    case 'quotations':
        $where = ["1=1"];
        $params = [];
        if (!empty($_GET['search'])) {
            $s = $_GET['search'];
            $clean_id = preg_replace('/[^0-9]/', '', $s);
            if ($clean_id !== '') {
                $where[] = "(q.id LIKE ? OR c.name LIKE ? OR q.id = ?)";
                $params[] = "%$s%";
                $params[] = "%$s%";
                $params[] = $clean_id;
            } else {
                $where[] = "(q.id LIKE ? OR c.name LIKE ?)";
                $params[] = "%$s%";
                $params[] = "%$s%";
            }
        }
        if (!empty($_GET['customer_id'])) {
            $where[] = "q.customer_id = ?";
            $params[] = $_GET['customer_id'];
        }
        if (!empty($_GET['start_date'])) {
            $where[] = "q.quotation_date >= ?";
            $params[] = $_GET['start_date'];
        }
        if (!empty($_GET['end_date'])) {
            $where[] = "q.quotation_date <= ?";
            $params[] = $_GET['end_date'];
        }
        $whereSql = implode(" AND ", $where);
        
        
        $countStmt = db()->prepare("SELECT COUNT(*) FROM quotations q JOIN customers c ON q.customer_id = c.id WHERE $whereSql");
        $countStmt->execute($params);
        $total_records = (int)$countStmt->fetchColumn();
        $data['total_pages'] = ceil($total_records / $limit);
        $data['current_page'] = $page_num;

        $stmt = db()->prepare("SELECT q.*, c.name as customer_name 
                                      FROM quotations q 
                                      JOIN customers c ON q.customer_id = c.id 
                                      WHERE $whereSql 
                                      ORDER BY q.id DESC
                                      LIMIT $limit OFFSET $offset");
        $stmt->execute($params);
        $data['quotations'] = $stmt->fetchAll();
        break;
    case 'lpos':
        $where = ["1=1"];
        $params = [];
        if (!empty($_GET['search'])) {
            $s = $_GET['search'];
            $clean_id = preg_replace('/[^0-9]/', '', $s);
            if ($clean_id !== '') {
                $where[] = "(q.id LIKE ? OR s.name LIKE ? OR q.id = ?)";
                $params[] = "%$s%";
                $params[] = "%$s%";
                $params[] = $clean_id;
            } else {
                $where[] = "(q.id LIKE ? OR s.name LIKE ?)";
                $params[] = "%$s%";
                $params[] = "%$s%";
            }
        }
        if (!empty($_GET['supplier_id'])) {
            $where[] = "q.supplier_id = ?";
            $params[] = $_GET['supplier_id'];
        }
        if (!empty($_GET['start_date'])) {
            $where[] = "q.lpo_date >= ?";
            $params[] = $_GET['start_date'];
        }
        if (!empty($_GET['end_date'])) {
            $where[] = "q.lpo_date <= ?";
            $params[] = $_GET['end_date'];
        }
        $whereSql = implode(" AND ", $where);
        
        
        $countStmt = db()->prepare("SELECT COUNT(*) FROM lpos q JOIN suppliers s ON q.supplier_id = s.id WHERE $whereSql");
        $countStmt->execute($params);
        $total_records = (int)$countStmt->fetchColumn();
        $data['total_pages'] = ceil($total_records / $limit);
        $data['current_page'] = $page_num;

        $stmt = db()->prepare("SELECT q.*, s.name as supplier_name 
                                      FROM lpos q 
                                      JOIN suppliers s ON q.supplier_id = s.id 
                                      WHERE $whereSql 
                                      ORDER BY q.id DESC
                                      LIMIT $limit OFFSET $offset");
        $stmt->execute($params);
        $data['lpos'] = $stmt->fetchAll();
        break;
    case 'payment_methods':
        $data['payment_methods'] = db()->query("SELECT * FROM payment_methods ORDER BY id DESC")->fetchAll();
        break;
    case 'outlets':
        if ($_SERVER['REQUEST_METHOD'] === 'POST' && ($_SESSION['user_role_name'] ?? '') === 'Administrator') {
            if (isset($_POST['add_outlet'])) {
                $name = trim($_POST['name'] ?? '');
                $address = trim($_POST['address'] ?? '');
                $phone = trim($_POST['phone'] ?? '');
                $status = $_POST['status'] ?? 'active';
                if ($name) {
                    $stmt = db()->prepare("INSERT INTO outlets (name, address, phone, status, created_at) VALUES (?, ?, ?, ?, NOW())");
                    $stmt->execute([$name, $address, $phone, $status]);
                }
            } elseif (isset($_POST['edit_outlet'])) {
                $id = (int)$_POST['id'];
                $name = trim($_POST['name'] ?? '');
                $address = trim($_POST['address'] ?? '');
                $phone = trim($_POST['phone'] ?? '');
                $status = $_POST['status'] ?? 'active';
                if ($name && $id) {
                    $stmt = db()->prepare("UPDATE outlets SET name = ?, address = ?, phone = ?, status = ? WHERE id = ?");
                    $stmt->execute([$name, $address, $phone, $status, $id]);
                }
            } elseif (isset($_POST['delete_outlet'])) {
                $id = (int)$_POST['id'];
                if ($id !== 1) {
                    db()->prepare("DELETE FROM outlets WHERE id = ?")->execute([$id]);
                }
            }
            header("Location: index.php?page=outlets");
            exit;
        }
        $countStmt = db()->query("SELECT COUNT(*) FROM outlets");
        $total_records = (int)$countStmt->fetchColumn();
        $data['total_pages'] = ceil($total_records / $limit);
        $data['current_page'] = $page_num;
        $stmt = db()->prepare("SELECT * FROM outlets ORDER BY id ASC LIMIT $limit OFFSET $offset");
        $stmt->execute();
        $data['outlets'] = $stmt->fetchAll();
        break;
    case 'copy_outlet_data': require 'pages/copy_outlet_data_logic.php'; break;
    case 'settings':
        // Already fetched globally
        break;
    case 'my_profile':
        $stmt = db()->prepare("SELECT * FROM users WHERE id = ?");
        $stmt->execute([$_SESSION['user_id']]);
        $data['user'] = $stmt->fetch();
        break;
    case 'sales':
    case 'purchases':
        $type = ($page === 'sales') ? 'sale' : 'purchase';
        $table = ($type === 'purchase') ? 'purchases' : 'invoices';
        $cust_supplier_col = ($type === 'purchase') ? 'supplier_id' : 'customer_id';
        $cust_supplier_table = ($type === 'purchase') ? 'suppliers' : 'customers';
        
        $where = ["1=1"];
        $params = [];
        
        if (!empty($_GET['search'])) {
            $s = $_GET['search'];
            $clean_id = preg_replace('/[^0-9]/', '', $s);
            if ($clean_id !== '') {
                $where[] = "(v.id LIKE ? OR c.name LIKE ? OR v.id = ?)";
                $params[] = "%$s%";
                $params[] = "%$s%";
                $params[] = $clean_id;
            } else {
                $where[] = "(v.id LIKE ? OR c.name LIKE ?)";
                $params[] = "%$s%";
                $params[] = "%$s%";
            }
        }
        
        if (!empty($_GET['customer_id'])) {
            $where[] = "v.$cust_supplier_col = ?";
            $params[] = $_GET['customer_id'];
        }
        
        if (!empty($_GET['start_date'])) {
            $where[] = "v.invoice_date >= ?";
            $params[] = $_GET['start_date'];
        }
        
        if (!empty($_GET['end_date'])) {
            $where[] = "v.invoice_date <= ?";
            $params[] = $_GET['end_date'];
        }
        
        $oid = current_outlet_id();
        if ($oid !== -1) {
            $where[] = "v.outlet_id = ?";
            $params[] = $oid;
        }
        
        $whereSql = implode(" AND ", $where);
        
        $countStmt = db()->prepare("SELECT COUNT(*) FROM $table v LEFT JOIN $cust_supplier_table c ON v.$cust_supplier_col = c.id WHERE $whereSql");
        $countStmt->execute($params);
        $total_records = (int)$countStmt->fetchColumn();
        $data['total_pages'] = ceil($total_records / $limit);
        $data['current_page'] = $page_num;

        $customerTaxColumn = entity_tax_column($cust_supplier_table);
        $customerTaxSelect = $customerTaxColumn !== null ? "c.$customerTaxColumn" : "''";
        $stmt = db()->prepare("SELECT v.*, c.name as customer_name, $customerTaxSelect as customer_tax_id, c.phone as customer_phone, o.name as outlet_name 
                               FROM $table v 
                               LEFT JOIN $cust_supplier_table c ON v.$cust_supplier_col = c.id 
                               LEFT JOIN outlets o ON v.outlet_id = o.id
                               WHERE $whereSql 
                               ORDER BY v.id DESC LIMIT $limit OFFSET $offset");
        $stmt->execute($params);
        $data['invoices'] = $stmt->fetchAll();
        foreach ($data['invoices'] as &$inv) {
            $inv['total_in_words'] = numberToWordsOMR($inv['total_with_vat']);
            if ($type === 'sale') {
                $item_stmt = db()->prepare("SELECT ii.*, i.name_en, i.name_ar, i.vat_rate FROM invoice_items ii LEFT JOIN stock_items i ON ii.item_id = i.id WHERE ii.invoice_id = ?");
                $item_stmt->execute([$inv['id']]);
                $inv['items'] = $item_stmt->fetchAll(PDO::FETCH_ASSOC);
            } else {
                $item_stmt = db()->prepare("SELECT pi.*, i.name_en, i.name_ar, i.vat_rate FROM purchase_items pi LEFT JOIN stock_items i ON pi.item_id = i.id WHERE pi.purchase_id = ?");
                $item_stmt->execute([$inv['id']]);
                $inv['items'] = $item_stmt->fetchAll(PDO::FETCH_ASSOC);
            }
        }
        unset($inv);
        
        $oid = current_outlet_id(); $items_list_raw = db()->query("SELECT i.id, i.name_en, i.name_ar, i.sale_price, i.purchase_price, i.stock_quantity, i.vat_rate, i.is_promotion, i.promotion_start, i.promotion_end, i.promotion_percent FROM stock_items i  ORDER BY i.name_en ASC")->fetchAll(PDO::FETCH_ASSOC);
        foreach ($items_list_raw as &$item) {
            $item['sale_price'] = getPromotionalPrice($item);
        }
        $data['items_list'] = $items_list_raw;
        $data['customers_list'] = db()->query("SELECT id, name FROM $cust_supplier_table ORDER BY name ASC")->fetchAll();
        
        $oid = current_outlet_id();
        $outlet_sql = ($oid !== -1) ? "WHERE outlet_id = $oid" : "";

        if ($type === 'sale') {
            $data['sales_invoices'] = db()->query("SELECT id, invoice_date, total_with_vat FROM invoices $outlet_sql ORDER BY id DESC")->fetchAll();
        } else {
            $data['purchase_invoices'] = db()->query("SELECT id, invoice_date, total_with_vat FROM purchases $outlet_sql ORDER BY id DESC")->fetchAll();
        }
        break;

    case 'sales_returns':
        $salesReturnReferenceColumn = sales_return_reference_column();
        $where = ["1=1"];
        $params = [];
        if (!empty($_GET['search'])) {
            $s = $_GET['search'];
            $clean_id = preg_replace('/[^0-9]/', '', $s);
            if ($clean_id !== '') {
                $where[] = "(sr.id LIKE ? OR c.name LIKE ? OR sr.`{$salesReturnReferenceColumn}` LIKE ? OR sr.id = ? OR sr.`{$salesReturnReferenceColumn}` = ?)";
                $params[] = "%$s%";
                $params[] = "%$s%";
                $params[] = "%$s%";
                $params[] = $clean_id;
                $params[] = $clean_id;
            } else {
                $where[] = "(sr.id LIKE ? OR c.name LIKE ? OR sr.`{$salesReturnReferenceColumn}` LIKE ?)";
                $params[] = "%$s%";
                $params[] = "%$s%";
                $params[] = "%$s%";
            }
        }
        $whereSql = implode(" AND ", $where);
        $stmt = db()->prepare("SELECT sr.*, sr.`{$salesReturnReferenceColumn}` AS invoice_id, c.name as customer_name, i.total_with_vat as invoice_total 
                               FROM sales_returns sr 
                               LEFT JOIN customers c ON sr.customer_id = c.id 
                               LEFT JOIN invoices i ON sr.`{$salesReturnReferenceColumn}` = i.id
                               WHERE $whereSql 
                               ORDER BY sr.id DESC");
        $stmt->execute($params);
        $data['returns'] = $stmt->fetchAll();
        $data['sales_invoices'] = db()->query("SELECT id, invoice_date, total_with_vat FROM invoices ORDER BY id DESC")->fetchAll();
        break;

    case 'purchase_returns':
        $purchaseReturnReferenceColumn = purchase_return_reference_column();
        $where = ["1=1"];
        $params = [];
        if (!empty($_GET['search'])) {
            $s = $_GET['search'];
            $clean_id = preg_replace('/[^0-9]/', '', $s);
            if ($clean_id !== '') {
                $where[] = "(pr.id LIKE ? OR c.name LIKE ? OR pr.`{$purchaseReturnReferenceColumn}` LIKE ? OR pr.id = ? OR pr.`{$purchaseReturnReferenceColumn}` = ?)";
                $params[] = "%$s%";
                $params[] = "%$s%";
                $params[] = "%$s%";
                $params[] = $clean_id;
                $params[] = $clean_id;
            } else {
                $where[] = "(pr.id LIKE ? OR c.name LIKE ? OR pr.`{$purchaseReturnReferenceColumn}` LIKE ?)";
                $params[] = "%$s%";
                $params[] = "%$s%";
                $params[] = "%$s%";
            }
        }
        $whereSql = implode(" AND ", $where);
        $stmt = db()->prepare("SELECT pr.*, pr.`{$purchaseReturnReferenceColumn}` AS purchase_id, c.name as supplier_name, i.total_with_vat as invoice_total 
                               FROM purchase_returns pr 
                               LEFT JOIN suppliers c ON pr.supplier_id = c.id 
                               LEFT JOIN purchases i ON pr.`{$purchaseReturnReferenceColumn}` = i.id
                               WHERE $whereSql 
                               ORDER BY pr.id DESC");
        $stmt->execute($params);
        $data['returns'] = $stmt->fetchAll();
        $data['purchase_invoices'] = db()->query("SELECT id, invoice_date, total_with_vat FROM purchases ORDER BY id DESC")->fetchAll();
        break;

    case 'customer_statement':
    case 'supplier_statement':
        $isCustomer = ($page === 'customer_statement');
        $entityTable = $isCustomer ? 'customers' : 'suppliers';
        $invoiceTable = $isCustomer ? 'invoices' : 'purchases';
        $paymentTable = $isCustomer ? 'payments' : 'purchase_payments';
        $fkColumn = $isCustomer ? 'customer_id' : 'supplier_id';
        $invFkColumn = $isCustomer ? 'invoice_id' : 'purchase_id';

        $data['entities'] = db()->query("SELECT id, name, balance FROM $entityTable ORDER BY name ASC")->fetchAll();
        
        $entity_id = (int)($_GET['entity_id'] ?? 0);
        if ($entity_id) {
            $data['selected_entity'] = db()->query("SELECT * FROM $entityTable WHERE id = $entity_id")->fetch();
            $start_date = $_GET['start_date'] ?? date('Y-m-01');
            $end_date = $_GET['end_date'] ?? date('Y-m-d');
            
            $stmt = db()->prepare("SELECT 'invoice' as trans_type, id, invoice_date as trans_date, total_with_vat as amount, status, id as ref_no 
                                   FROM $invoiceTable 
                                   WHERE $fkColumn = ? AND invoice_date BETWEEN ? AND ?");
            $stmt->execute([$entity_id, $start_date, $end_date]);
            $invoices = $stmt->fetchAll(PDO::FETCH_ASSOC);
            
            $stmt = db()->prepare("SELECT 'payment' as trans_type, p.id, p.payment_date as trans_date, p.amount, p.payment_method, p.$invFkColumn as ref_no 
                                   FROM $paymentTable p 
                                   JOIN $invoiceTable i ON p.$invFkColumn = i.id 
                                   WHERE i.$fkColumn = ? AND p.payment_date BETWEEN ? AND ?");
            $stmt->execute([$entity_id, $start_date, $end_date]);
            $payments = $stmt->fetchAll(PDO::FETCH_ASSOC);
            
            $transactions = array_merge($invoices, $payments);
            usort($transactions, function($a, $b) {
                return strtotime($a['trans_date']) <=> strtotime($b['trans_date']);
            });
            
            $data['transactions'] = $transactions;
        }
        break;
    case 'expense_categories':
        $data['expense_categories'] = db()->query("SELECT * FROM expense_categories ORDER BY name_en ASC")->fetchAll();
        break;
    case 'expenses':
        $where = ["1=1"];
        $params = [];
        if (!empty($_GET['category_id'])) {
            $where[] = "e.category_id = ?";
            $params[] = $_GET['category_id'];
        }
        if (!empty($_GET['start_date'])) {
            $where[] = "e.expense_date >= ?";
            $params[] = $_GET['start_date'];
        }
        if (!empty($_GET['end_date'])) {
            $where[] = "e.expense_date <= ?";
            $params[] = $_GET['end_date'];
        }
        $whereSql = implode(" AND ", $where);
        $stmt = db()->prepare("SELECT e.*, c.name_en as cat_en, c.name_ar as cat_ar 
                               FROM expenses e 
                               LEFT JOIN expense_categories c ON e.category_id = c.id 
                               WHERE $whereSql 
                               ORDER BY e.expense_date DESC, e.id DESC");
        $stmt->execute($params);
        $data['expenses'] = $stmt->fetchAll();
        break;
    case 'role_groups':
        $data['role_groups'] = db()->query("SELECT * FROM role_groups ORDER BY name ASC")->fetchAll();
        break;
    case 'users':
        require 'pages/users_logic.php';
        break;
    case 'backups':
        $data['backups'] = BackupService::getBackups();
        $stmt = db()->prepare("SELECT * FROM settings WHERE `key` IN ('backup_limit', 'backup_auto_enabled', 'backup_time')");
        $stmt->execute();
        $data['backup_settings'] = $stmt->fetchAll(PDO::FETCH_KEY_PAIR);
        break;
    case 'accounting':
        require 'pages/accounting_logic.php';
        break;
    case 'expense_report':
        $start_date = $_GET['start_date'] ?? date('Y-m-01');
        $end_date = $_GET['end_date'] ?? date('Y-m-d');
        $category_id = $_GET['category_id'] ?? '';
        
        $where = "WHERE e.expense_date BETWEEN ? AND ?";
        $params = [$start_date, $end_date];
        
        if ($category_id !== '') {
            $where .= " AND e.category_id = ?";
            $params[] = $category_id;
        }

        $stmt = db()->prepare("SELECT c.name_en, c.name_ar, SUM(e.amount) as total 
                               FROM expenses e 
                               JOIN expense_categories c ON e.category_id = c.id 
                               $where 
                               GROUP BY c.id 
                               ORDER BY total DESC");
        $stmt->execute($params);
        $data['report_by_category'] = $stmt->fetchAll();
        
        $stmt = db()->prepare("SELECT SUM(amount) FROM expenses e $where");
        $stmt->execute($params);
        $data['total_expenses'] = $stmt->fetchColumn() ?: 0;
        
        $data['expense_categories'] = db()->query("SELECT * FROM expense_categories ORDER BY name_en ASC")->fetchAll();
        break;
    case 'expiry_report':
        $where = ["expiry_date IS NOT NULL"];
        $params = [];
        $filter = $_GET['filter'] ?? 'all';
        if ($filter === 'expired') {
            $where[] = "expiry_date <= CURDATE()";
        } elseif ($filter === 'near_expiry') {
            $where[] = "expiry_date > CURDATE() AND expiry_date <= DATE_ADD(CURDATE(), INTERVAL 30 DAY)";
        }
        
        $whereSql = implode(" AND ", $where);
        $stmt = db()->prepare("SELECT i.*, c.name_en as cat_en, c.name_ar as cat_ar 
                               FROM stock_items i 
                               LEFT JOIN stock_categories c ON i.category_id = c.id 
                               WHERE $whereSql 
                               ORDER BY i.expiry_date ASC");
        $stmt->execute($params);
        $data['expiry_items'] = $stmt->fetchAll();
        break;
    case 'low_stock_report':
        $oid = current_outlet_id();
        $stmt = db()->prepare("SELECT i.*, i.stock_quantity, c.name_en as cat_en, c.name_ar as cat_ar, s.name as supplier_name 
                               FROM stock_items i 
                               
                               LEFT JOIN stock_categories c ON i.category_id = c.id 
                               LEFT JOIN suppliers s ON i.supplier_id = s.id
                               WHERE i.outlet_id = $oid AND i.stock_quantity <= i.min_stock_level 
                               ORDER BY (i.min_stock_level - i.stock_quantity) DESC");
        $stmt->execute();
        $data['low_stock_items'] = $stmt->fetchAll();
        break;
    case 'cashflow_report':
        $start_date = $_GET['start_date'] ?? date('Y-m-01');
        $end_date = $_GET['end_date'] ?? date('Y-m-d');
        
        // Fetch Cash & Bank Account IDs
        $cash_accounts = db()->query("SELECT id FROM acc_accounts WHERE code IN (1100, 1200)")->fetchAll(PDO::FETCH_COLUMN);
        $cash_ids_str = implode(',', $cash_accounts);
        
        if (!empty($cash_ids_str)) {
            // Opening Balance
            $stmt = db()->prepare("SELECT SUM(debit - credit) FROM acc_ledger l JOIN acc_journal_entries je ON l.journal_entry_id = je.id WHERE l.account_id IN ($cash_ids_str) AND je.entry_date < ?");
            $stmt->execute([$start_date]);
            $data['opening_balance'] = $stmt->fetchColumn() ?: 0;
            
            // Transactions in range
            $stmt = db()->prepare("SELECT 
                                    je.entry_date, 
                                    je.description, 
                                    l.debit as inflow, 
                                    l.credit as outflow,
                                    a.name_en as other_account,
                                    a.type as other_type
                                   FROM acc_ledger l
                                   JOIN acc_journal_entries je ON l.journal_entry_id = je.id
                                   LEFT JOIN acc_ledger l2 ON l2.journal_entry_id = je.id AND l2.id != l.id
                                   LEFT JOIN acc_accounts a ON l2.account_id = a.id
                                   WHERE l.account_id IN ($cash_ids_str) 
                                   AND je.entry_date BETWEEN ? AND ?
                                   ORDER BY je.entry_date ASC, je.id ASC");
            $stmt->execute([$start_date, $end_date]);
            $data['cash_transactions'] = $stmt->fetchAll(PDO::FETCH_ASSOC);
        } else {
            $data['opening_balance'] = 0;
            $data['cash_transactions'] = [];
        }
        break;
    case 'hr_departments':
        $data['departments'] = db()->query("SELECT * FROM hr_departments ORDER BY id DESC")->fetchAll();
        break;
    case 'hr_employees':
        $data['employees'] = db()->query("SELECT e.*, d.name as dept_name FROM hr_employees e LEFT JOIN hr_departments d ON e.department_id = d.id ORDER BY e.id DESC")->fetchAll();
        $data['departments'] = db()->query("SELECT * FROM hr_departments ORDER BY name ASC")->fetchAll();
        break;
    case 'hr_attendance':
        $date = $_GET['date'] ?? date('Y-m-d');
        $data['attendance_date'] = $date;
        $data['employees'] = db()->query("SELECT e.id, e.name, d.name as dept_name, a.status, a.clock_in, a.clock_out 
                                          FROM hr_employees e 
                                          LEFT JOIN hr_departments d ON e.department_id = d.id 
                                          LEFT JOIN hr_attendance a ON e.id = a.employee_id AND a.attendance_date = '$date' 
                                          WHERE e.status = 'active' ORDER BY e.name ASC")->fetchAll();
        break;
    case 'hr_payroll':
        $month = (int)($_GET['month'] ?? date('m'));
        $year = (int)($_GET['year'] ?? date('Y'));
        $data['month'] = $month;
        $data['year'] = $year;
        $data['payroll'] = db()->query("SELECT p.*, e.name as emp_name FROM hr_payroll p JOIN hr_employees e ON p.employee_id = e.id WHERE p.payroll_month = $month AND p.payroll_year = $year ORDER BY p.id DESC")->fetchAll();
        $data['employees'] = db()->query("SELECT id, name, salary FROM hr_employees WHERE status = 'active' ORDER BY name ASC")->fetchAll();
        break;
    case 'loyalty_history':
        $where = ["1=1"];
        $params = [];
        if (!empty($_GET['customer_id'])) {
            $where[] = "lt.customer_id = ?";
            $params[] = (int)$_GET['customer_id'];
        }
        if (!empty($_GET['type'])) {
            $where[] = "lt.transaction_type = ?";
            $params[] = $_GET['type'];
        }
        $whereSql = implode(" AND ", $where);
        $stmt = db()->prepare("SELECT lt.*, c.name as customer_name, c.loyalty_tier, c.loyalty_points 
                               FROM loyalty_transactions lt 
                               JOIN customers c ON lt.customer_id = c.id 
                               WHERE $whereSql 
                               ORDER BY lt.created_at DESC");
        $stmt->execute($params);
        $data['loyalty_transactions'] = $stmt->fetchAll();
        break;
    case 'devices':
        $data['devices'] = db()->query("SELECT * FROM hr_biometric_devices ORDER BY id DESC")->fetchAll();
        break;
    case 'scale_devices':
        $data['scale_devices'] = db()->query("SELECT * FROM pos_devices ORDER BY id DESC")->fetchAll();
        break;
    case 'cash_registers':
        $data['cash_registers'] = db()->query("SELECT * FROM cash_registers ORDER BY id DESC")->fetchAll();
        break;
    case 'register_sessions':
        $where = ["1=1"];
        $params = [];
        
        // Filter by user if provided and user has permission
        if (isset($_GET['user_id']) && !empty($_GET['user_id'])) {
            if (can('users_view')) {
                $where[] = "s.user_id = ?";
                $params[] = $_GET['user_id'];
            }
        }
        
        if (!can('users_view')) {
            $where[] = "s.user_id = ?";
            $params[] = $_SESSION['user_id'];
        }

        // Filter by date range
        if (isset($_GET['date_from']) && !empty($_GET['date_from'])) {
            $where[] = "s.opened_at >= ?";
            $params[] = $_GET['date_from'] . ' 00:00:00';
        }
        if (isset($_GET['date_to']) && !empty($_GET['date_to'])) {
            $where[] = "s.opened_at <= ?";
            $params[] = $_GET['date_to'] . ' 23:59:59';
        }

        $whereSql = implode(" AND ", $where);
        $stmt = db()->prepare("SELECT s.*, r.name as register_name, u.username 
                               FROM register_sessions s 
                               LEFT JOIN cash_registers r ON s.register_id = r.id 
                               LEFT JOIN users u ON s.user_id = u.id 
                               WHERE $whereSql 
                               ORDER BY s.id DESC");
        $stmt->execute($params);
        $data['sessions'] = $stmt->fetchAll();
        $data['cash_registers'] = db()->query("SELECT * FROM cash_registers WHERE status = 'active'")->fetchAll();
        $data['users'] = db()->query("SELECT id, username FROM users ORDER BY username ASC")->fetchAll();
        break;
    default:
        if (can('dashboard_view')) {
            $data['customers'] = db()->query("SELECT * FROM customers ORDER BY id DESC LIMIT 5")->fetchAll();
                        // Statistics with Outlet Filter
            $current_oid = current_outlet_id();
            $inv_cond = ($current_oid > 0) ? " WHERE outlet_id = $current_oid " : "";
            $pos_cond = " WHERE status = 'completed' " . (($current_oid > 0) ? " AND outlet_id = $current_oid " : "");
            
            $pay_inv_cond = ($current_oid > 0) ? " WHERE i.outlet_id = $current_oid " : "";
            $pay_pos_cond = ($current_oid > 0) ? " WHERE t.outlet_id = $current_oid " : "";
            
            $pur_cond = ($current_oid > 0) ? " WHERE outlet_id = $current_oid " : "";
            $pay_pur_cond = ($current_oid > 0) ? " WHERE p.outlet_id = $current_oid " : "";

            $low_stock_query = ($current_oid > 0) 
                ? "SELECT COUNT(*) FROM stock_items WHERE outlet_id = $current_oid AND stock_quantity <= min_stock_level"
                : "SELECT COUNT(*) FROM stock_items WHERE stock_quantity <= min_stock_level";

            $data['stats'] = [
                'total_customers' => db()->query("SELECT COUNT(*) FROM customers")->fetchColumn(),
                'total_items' => db()->query("SELECT COUNT(*) FROM stock_items")->fetchColumn(),
                'total_sales' => (db()->query("SELECT SUM(total_with_vat) FROM invoices $inv_cond")->fetchColumn() ?: 0) + (db()->query("SELECT SUM(net_amount) FROM pos_transactions $pos_cond")->fetchColumn() ?: 0),
                'total_received' => (db()->query("SELECT SUM(p.amount) FROM payments p JOIN invoices i ON p.invoice_id = i.id $pay_inv_cond")->fetchColumn() ?: 0) + (db()->query("SELECT SUM(pp.amount) FROM pos_payments pp JOIN pos_transactions t ON pp.transaction_id = t.id $pay_pos_cond")->fetchColumn() ?: 0),
                'total_purchases' => db()->query("SELECT SUM(total_with_vat) FROM purchases $pur_cond")->fetchColumn() ?: 0,
                'total_paid' => db()->query("SELECT SUM(pp.amount) FROM purchase_payments pp JOIN purchases p ON pp.purchase_id = p.id $pay_pur_cond")->fetchColumn() ?: 0,
                'expired_items' => db()->query("SELECT COUNT(*) FROM stock_items WHERE expiry_date IS NOT NULL AND expiry_date <= CURDATE()")->fetchColumn(),
                'near_expiry_items' => db()->query("SELECT COUNT(*) FROM stock_items WHERE expiry_date IS NOT NULL AND expiry_date > CURDATE() AND expiry_date <= DATE_ADD(CURDATE(), INTERVAL 30 DAY)")->fetchColumn(),
                'low_stock_items_count' => db()->query($low_stock_query)->fetchColumn(),
            ];
            $data['stats']['total_receivable'] = $data['stats']['total_sales'] - $data['stats']['total_received'];
            $data['stats']['total_payable'] = $data['stats']['total_purchases'] - $data['stats']['total_paid'];

            // Sales Chart Data
            $data['monthly_sales'] = db()->query("SELECT DATE_FORMAT(invoice_date, '%M %Y') as label, SUM(total_with_vat) as total FROM invoices GROUP BY DATE_FORMAT(invoice_date, '%Y-%m') ORDER BY invoice_date ASC LIMIT 12")->fetchAll(PDO::FETCH_ASSOC);
            $data['yearly_sales'] = db()->query("SELECT YEAR(invoice_date) as label, SUM(total_with_vat) as total FROM invoices GROUP BY label ORDER BY label ASC LIMIT 5")->fetchAll(PDO::FETCH_ASSOC);
        }
        break;
}

$projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
?>
<!doctype html>
<html lang="<?= $lang ?>" dir="<?= $dir ?>">
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title><?= htmlspecialchars(__($page)) ?> - Admin Panel</title>
    <meta name="description" content="<?= htmlspecialchars($projectDescription) ?>" />
    <?php if (!empty($data['settings']['favicon'])): ?>
    <link rel="icon" href="<?= htmlspecialchars($data['settings']['favicon']) ?>?v=<?= time() ?>">
    <?php endif; ?>
    
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap<?= $dir === 'rtl' ? '.rtl' : '' ?>.min.css" rel="stylesheet">
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <link href="https://cdn.jsdelivr.net/npm/select2@4.1.0-rc.0/dist/css/select2.min.css" rel="stylesheet" />
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/select2@4.1.0-rc.0/dist/js/select2.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/sweetalert2@11"></script>
    <script src="https://cdn.jsdelivr.net/npm/jsbarcode@3.11.5/dist/JsBarcode.all.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
    <script src="assets/js/main.js?v=<?= time() ?>"></script>
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="assets/css/custom.css?v=<?= time() ?>">
    <style>
        /* Force RTL Sidebar Position */
        [dir="rtl"] .sidebar {
            right: 0 !important;
            left: auto !important;
        }
        [dir="rtl"] .main-content {
            margin-left: 0 !important;
            margin-right: 210px !important;
        }
        @media (max-width: 1199.98px) {
            [dir="rtl"] .sidebar {
                right: -210px !important;
                left: auto !important;
            }
            [dir="rtl"] .sidebar.show {
                right: 0 !important;
                left: auto !important;
            }
            [dir="rtl"] .main-content {
                margin-right: 0 !important;
                margin-left: 0 !important;
            }
            .pos-container {
                flex-direction: column !important;
                height: auto !important;
            }
            .pos-cart {
                width: 100% !important;
                height: auto !important;
                position: sticky;
                bottom: 0;
                z-index: 1001;
            }
            .pos-products {
                height: auto !important;
                max-height: 500px;
            }
        }
        
        /* General Responsive Helpers */
        @media (max-width: 767.98px) {
            .table:not(.table-borderless):not(.table-sm) {
                display: block;
                width: 100%;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }
            .card {
                padding: 1rem !important;
            }
            .topbar {
                padding: 0.75rem 1rem !important;
                margin: -1rem -1rem 1rem -1rem !important;
            }
            .main-content {
                padding: 1rem !important;
            }
            .h4, h4 {
                font-size: 1.1rem;
            }
            .btn-sm-square {
                width: 32px;
                height: 32px;
                padding: 0;
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .topbar {
                flex-wrap: wrap;
                gap: 10px;
                position: sticky;
                top: 0;
                z-index: 990;
            }
            .topbar h4 {
                width: 100%;
                order: 2;
                font-size: 1.1rem;
                margin-top: 5px !important;
            }
            .topbar > div:first-child {
                order: 1;
            }
            .topbar > div:last-child {
                order: 3;
                width: 100%;
                justify-content: space-between;
                border-top: 1px solid var(--border);
                padding-top: 5px;
            }
            .topbar .btn span {
                display: none;
            }
        }

        @media print {
            .sidebar, .topbar, .d-print-none, .no-print, .btn-group, .btn, .badge i { display: none !important; }
            .main-content { margin: 0 !important; padding: 0 !important; background: white !important; width: 100% !important; }
            .card { border: none !important; box-shadow: none !important; padding: 0 !important; margin: 0 !important; }
            .table { border-collapse: collapse !important; width: 100% !important; margin-top: 20px !important; }
            .table th, .table td { border: 1px solid #000 !important; padding: 8px !important; font-size: 11px !important; color: #000 !important; }
            .table thead th { background-color: #eee !important; color: #000 !important; font-weight: bold !important; text-transform: uppercase; }
            .print-only { display: block !important; }
            .text-success, .text-danger, .text-primary, .text-warning { color: #000 !important; }
            .badge { border: none !important; padding: 0 !important; color: #000 !important; background: transparent !important; font-weight: normal !important; }
            body { font-size: 12px !important; color: #000 !important; background: #fff !important; }
            @page { margin: 1cm; }
        }
        .print-only { display: none; }
        .units-page-card {
            background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(247,249,252,0.95) 100%);
            border: 1px solid rgba(15, 23, 42, 0.06);
            box-shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
        }
        .units-shell {
            display: grid;
            gap: 1.5rem;
        }
        .units-hero {
            position: relative;
            overflow: hidden;
            border-radius: 1.5rem;
            padding: 1.75rem;
            background: linear-gradient(135deg, #ffffff 0%, #eef7f2 42%, #fff5ea 100%);
            border: 1px solid rgba(15, 23, 42, 0.08);
        }
        .units-hero::before,
        .units-hero::after {
            content: '';
            position: absolute;
            border-radius: 999px;
            pointer-events: none;
        }
        .units-hero::before {
            width: 18rem;
            height: 18rem;
            right: -6rem;
            top: -8rem;
            background: radial-gradient(circle, rgba(14, 165, 233, 0.18) 0%, rgba(14, 165, 233, 0) 72%);
        }
        .units-hero::after {
            width: 14rem;
            height: 14rem;
            left: -4rem;
            bottom: -7rem;
            background: radial-gradient(circle, rgba(34, 197, 94, 0.18) 0%, rgba(34, 197, 94, 0) 72%);
        }
        .units-hero__copy,
        .units-toolbar,
        .units-stats {
            position: relative;
            z-index: 1;
        }
        .units-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            padding: 0.45rem 0.8rem;
            margin-bottom: 0.85rem;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.84);
            border: 1px solid rgba(15, 23, 42, 0.08);
            color: #0f172a;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
        }
        .units-toolbar {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }
        .units-toolbar .btn {
            border-radius: 999px;
            padding: 0.75rem 1rem;
            font-weight: 600;
            box-shadow: 0 10px 20px rgba(15, 23, 42, 0.08);
        }
        .units-stats {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .units-stat {
            padding: 1rem 1.15rem;
            border-radius: 1.25rem;
            background: rgba(255, 255, 255, 0.84);
            border: 1px solid rgba(15, 23, 42, 0.08);
            backdrop-filter: blur(8px);
            box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
        }
        .units-stat__label {
            display: block;
            font-size: 0.78rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: #64748b;
            margin-bottom: 0.35rem;
        }
        .units-stat strong {
            display: block;
            font-size: 1.5rem;
            line-height: 1;
            color: #0f172a;
        }
        .units-stat small {
            display: block;
            margin-top: 0.45rem;
            color: #64748b;
        }
        .units-table-card {
            border: 1px solid rgba(15, 23, 42, 0.08);
            border-radius: 1.25rem;
            background: #fff;
            overflow: hidden;
        }
        .units-table-card__header {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
            justify-content: space-between;
            padding: 1.25rem 1.5rem;
            border-bottom: 1px solid rgba(15, 23, 42, 0.06);
            background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
        }
        .units-helper-pill {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            padding: 0.55rem 0.85rem;
            border-radius: 999px;
            background: #f1f5f9;
            color: #0f172a;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .units-table thead th {
            font-size: 0.78rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: #64748b;
            border-bottom-color: rgba(15, 23, 42, 0.06);
            padding: 1rem 1.25rem;
        }
        .units-table tbody td {
            padding: 1.15rem 1.25rem;
            border-bottom-color: rgba(15, 23, 42, 0.06);
        }
        .units-table tbody tr:last-child td {
            border-bottom: none;
        }
        .units-name-stack {
            display: grid;
            gap: 0.2rem;
        }
        .units-name-stack__primary {
            font-weight: 700;
            color: #0f172a;
        }
        .units-name-stack__secondary {
            color: #64748b;
            font-size: 0.95rem;
        }
        .units-short-stack {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .units-short-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 3.25rem;
            padding: 0.45rem 0.75rem;
            border-radius: 0.8rem;
            background: #ecfdf5;
            color: #166534;
            font-weight: 700;
            font-size: 0.82rem;
            border: 1px solid rgba(22, 101, 52, 0.1);
        }
        .units-short-badge--muted {
            background: #fff7ed;
            color: #9a3412;
            border-color: rgba(154, 52, 18, 0.1);
        }
        .units-readiness {
            display: flex;
            flex-wrap: wrap;
            gap: 0.45rem;
        }
        .units-status-badge {
            font-weight: 600;
            padding: 0.45rem 0.7rem;
            border-radius: 999px;
        }
        .units-status-badge.is-ready {
            background: #dcfce7;
            color: #166534;
        }
        .units-status-badge.is-pending {
            background: #fee2e2;
            color: #b91c1c;
        }
        .units-actions {
            display: inline-flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .units-actions .btn {
            border-radius: 0.85rem;
            padding: 0.45rem 0.75rem;
        }
        .units-empty-state {
            max-width: 24rem;
            margin: 0 auto;
            display: grid;
            gap: 0.75rem;
            justify-items: center;
        }
        .units-empty-state__icon {
            width: 4rem;
            height: 4rem;
            display: grid;
            place-items: center;
            border-radius: 1.2rem;
            background: linear-gradient(135deg, #e0f2fe, #dcfce7);
            color: #0f172a;
            font-size: 1.5rem;
        }
        .unit-modal .modal-header {
            padding: 1.5rem 1.5rem 0;
        }
        .units-modal-kicker {
            display: inline-flex;
            padding: 0.35rem 0.7rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            background: #e0f2fe;
            color: #0c4a6e;
            margin-bottom: 0.75rem;
        }
        .unit-form-shell {
            display: grid;
            gap: 1rem;
        }
        .unit-form-section {
            border: 1px solid rgba(15, 23, 42, 0.08);
            border-radius: 1.2rem;
            padding: 1rem;
            background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
        }
        .unit-form-section__header {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 1rem;
        }
        .unit-form-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 1rem;
        }
        .unit-field label {
            font-weight: 600;
            color: #0f172a;
        }
        .unit-field .form-text {
            color: #64748b;
            font-size: 0.82rem;
        }
        .unit-preview-card {
            border-radius: 1rem;
            padding: 1rem;
            background: linear-gradient(135deg, #0f172a, #1e293b);
            color: #f8fafc;
        }
        .unit-preview-card__label {
            display: block;
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            opacity: 0.72;
            margin-bottom: 0.65rem;
        }
        .unit-preview-row {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .unit-preview-chip {
            display: inline-flex;
            align-items: center;
            padding: 0.45rem 0.7rem;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
        }
        .unit-preview-chip.is-muted {
            background: rgba(255, 255, 255, 0.2);
        }
        .unit-import-note {
            border-radius: 1rem;
            padding: 1rem;
            background: linear-gradient(135deg, #eff6ff 0%, #fefce8 100%);
            border: 1px solid rgba(148, 163, 184, 0.18);
        }
        .unit-import-note ul {
            padding-left: 1.25rem;
            margin-bottom: 0;
            color: #475569;
        }
        [dir="rtl"] .unit-import-note ul {
            padding-left: 0;
            padding-right: 1.25rem;
        }
        @media (max-width: 991.98px) {
            .units-stats {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }
        }
        @media (max-width: 767.98px) {
            .units-hero {
                padding: 1.25rem;
            }
            .units-stats,
            .unit-form-grid {
                grid-template-columns: 1fr;
            }
            .units-table-card__header {
                padding: 1rem;
            }
            .units-table thead th,
            .units-table tbody td {
                padding: 0.95rem 0.85rem;
            }
            .unit-modal .modal-header {
                padding: 1.25rem 1.25rem 0;
            }
        }
        [dir="rtl"] { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
    </style>
</head>
<body class="theme-<?= htmlspecialchars($_SESSION['theme'] ?? 'default') ?>">

<?php if (!$is_activated && $trial_days > 0): ?>
    <div class="alert alert-warning text-center mb-0 rounded-0 d-print-none py-2" style="position: sticky; top: 0; z-index: 2000; font-size: 0.85rem;">
        <i class="bi bi-info-circle-fill me-2"></i>
        <?= $lang === 'ar' ? "نسخة تجريبية: متبقي $trial_days يوم" : "Trial Version: $trial_days days remaining" ?>.
        <a href="index.php?page=activate" class="alert-link ms-2 fw-bold"><?= __('activate_now') ?></a>
    </div>
<?php endif; ?>

<div class="sidebar">
    <div class="sidebar-header text-center">
        <div class="text-white fw-bold"><i class="fas fa-balance-scale me-2"></i> Meezan Accounting System</div>
        <div class="text-white-50 small" style="font-size: 0.7rem;">System v1.2.5</div>
    </div>
    <nav class="mt-4">
        <!-- General Section -->
        <a href="index.php?page=dashboard" class="nav-link <?= !isset($_GET['page']) || $_GET['page'] === 'dashboard' ? 'active' : '' ?>">
            <i class="fas fa-chart-pie"></i> <span><?= __('dashboard') ?></span>
        </a>

        <!-- POS Section -->
        <?php if (can('pos_view')): ?>
        <a href="index.php?page=pos" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'pos' ? 'active' : '' ?>">
            <i class="fas fa-cash-register"></i> <span><?= __('pos') ?></span>
        </a>
        <?php endif; ?>

        <!-- Inventory Section -->
        <?php if (can('items_view') || can('categories_view') || can('units_view')): ?>
        <div class="nav-section-title px-4 mt-3 mb-1 text-uppercase text-muted <?= !in_array($page, ['items', 'categories', 'units']) ? 'collapsed' : '' ?>" data-bs-toggle="collapse" data-bs-target="#stock-collapse">
            <span><i class="fas fa-boxes-stacked group-icon"></i><span><?= __('inventory') ?></span></span>
            <i class="fas fa-chevron-down chevron"></i>
        </div>
        <div class="collapse <?= in_array($page, ['items', 'categories', 'units']) ? 'show' : '' ?>" id="stock-collapse">
            <?php if (can('items_view')): ?>
            <a href="index.php?page=items" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'items' ? 'active' : '' ?>">
                <i class="fas fa-box"></i> <span><?= __('items') ?></span>
            </a>
            <?php endif; ?>
            <?php if (can('categories_view')): ?>
            <a href="index.php?page=categories" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'categories' ? 'active' : '' ?>">
                <i class="fas fa-tags"></i> <span><?= __('categories') ?></span>
            </a>
            <?php endif; ?>
            <?php if (can('units_view')): ?>
            <a href="index.php?page=units" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'units' ? 'active' : '' ?>">
                <i class="fas fa-ruler-combined"></i> <span><?= __('units') ?></span>
            </a>
            <?php endif; ?>
        </div>
        <?php endif; ?>

        <!-- Customers Section -->
        <?php if (can('customers_view')): ?>
        <div class="nav-section-title px-4 mt-3 mb-1 text-uppercase text-muted <?= !in_array($page, ['customers']) ? 'collapsed' : '' ?>" data-bs-toggle="collapse" data-bs-target="#customers-collapse">
            <span><i class="fas fa-users group-icon"></i><span><?= __('customers') ?></span></span>
            <i class="fas fa-chevron-down chevron"></i>
        </div>
        <div class="collapse <?= in_array($page, ['customers']) ? 'show' : '' ?>" id="customers-collapse">
            <a href="index.php?page=customers" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'customers' ? 'active' : '' ?>">
                <i class="fas fa-users"></i> <span><?= __('customers') ?></span>
            </a>
        </div>
        <?php endif; ?>

        <!-- Suppliers Section -->
        <?php if (can('suppliers_view')): ?>
        <div class="nav-section-title px-4 mt-3 mb-1 text-uppercase text-muted <?= !in_array($page, ['suppliers']) ? 'collapsed' : '' ?>" data-bs-toggle="collapse" data-bs-target="#suppliers-collapse">
            <span><i class="fas fa-truck-field group-icon"></i><span><?= __('suppliers') ?></span></span>
            <i class="fas fa-chevron-down chevron"></i>
        </div>
        <div class="collapse <?= in_array($page, ['suppliers']) ? 'show' : '' ?>" id="suppliers-collapse">
            <a href="index.php?page=suppliers" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'suppliers' ? 'active' : '' ?>">
                <i class="fas fa-truck-field"></i> <span><?= __('suppliers') ?></span>
            </a>
        </div>
        <?php endif; ?>

        <!-- Sales Section -->
        <?php if (can('sales_view') || can('sales_returns_view') || can('quotations_view')): ?>
        <div class="nav-section-title px-4 mt-3 mb-1 text-uppercase text-muted <?= !in_array($page, ['sales', 'sales_returns', 'quotations']) ? 'collapsed' : '' ?>" data-bs-toggle="collapse" data-bs-target="#sales-collapse">
            <span><i class="fas fa-file-invoice-dollar group-icon"></i><span><?= __('sales') ?></span></span>
            <i class="fas fa-chevron-down chevron"></i>
        </div>
        <div class="collapse <?= in_array($page, ['sales', 'sales_returns', 'quotations']) ? 'show' : '' ?>" id="sales-collapse">
            <?php if (can('sales_view')): ?>
            <a href="index.php?page=sales" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'sales' ? 'active' : '' ?>">
                <i class="fas fa-file-invoice-dollar"></i> <span><?= __('sales') ?></span>
            </a>
            <?php endif; ?>
            <?php if (can('sales_returns_view')): ?>
            <a href="index.php?page=sales_returns" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'sales_returns' ? 'active' : '' ?>">
                <i class="fas fa-reply"></i> <span><?= __('sales_returns') ?></span>
            </a>
            <?php endif; ?>
            <?php if (can('quotations_view')): ?>
            <a href="index.php?page=quotations" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'quotations' ? 'active' : '' ?>">
                <i class="fas fa-file-lines"></i> <span><?= __('quotations') ?></span>
            </a>
            <?php endif; ?>
        </div>
        <?php endif; ?>

        <!-- Purchases Section -->
        <?php if (can('purchases_view') || can('lpos_view') || can('purchase_returns_view')): ?>
        <div class="nav-section-title px-4 mt-3 mb-1 text-uppercase text-muted <?= !in_array($page, ['purchases', 'lpos', 'purchase_returns']) ? 'collapsed' : '' ?>" data-bs-toggle="collapse" data-bs-target="#purchases-collapse">
            <span><i class="fas fa-cart-shopping group-icon"></i><span><?= __('purchases') ?></span></span>
            <i class="fas fa-chevron-down chevron"></i>
        </div>
        <div class="collapse <?= in_array($page, ['purchases', 'lpos', 'purchase_returns']) ? 'show' : '' ?>" id="purchases-collapse">
            <?php if (can('purchases_view')): ?>
            <a href="index.php?page=purchases" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'purchases' ? 'active' : '' ?>">
                <i class="fas fa-cart-shopping"></i> <span><?= __('purchases') ?></span>
            </a>
            <?php endif; ?>
            <?php if (can('lpos_view')): ?>
            <a href="index.php?page=lpos" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'lpos' ? 'active' : '' ?>">
                <i class="fas fa-file-contract"></i> <span><?= __('lpos') ?></span>
            </a>
            <?php endif; ?>
            <?php if (can('purchase_returns_view')): ?>
            <a href="index.php?page=purchase_returns" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'purchase_returns' ? 'active' : '' ?>">
                <i class="fas fa-share"></i> <span><?= __('purchase_returns') ?></span>
            </a>
            <?php endif; ?>
        </div>
        <?php endif; ?>

        <!-- Expenses Section -->
        <?php if (can('accounting_view')): ?>
        <div class="nav-section-title px-4 mt-3 mb-1 text-uppercase text-muted <?= !in_array($page, ['expense_categories', 'expenses']) ? 'collapsed' : '' ?>" data-bs-toggle="collapse" data-bs-target="#expenses-collapse">
            <span><i class="fas fa-wallet group-icon"></i><span><?= __('expenses') ?></span></span>
            <i class="fas fa-chevron-down chevron"></i>
        </div>
        <div class="collapse <?= in_array($page, ['expense_categories', 'expenses']) ? 'show' : '' ?>" id="expenses-collapse">
            <a href="index.php?page=expense_categories" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'expense_categories' ? 'active' : '' ?>">
                <i class="fas fa-layer-group"></i> <span><?= __('expense_categories') ?></span>
            </a>
            <a href="index.php?page=expenses" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'expenses' ? 'active' : '' ?>">
                <i class="fas fa-file-invoice"></i> <span><?= __('expenses') ?></span>
            </a>
        </div>
        <?php endif; ?>

        <!-- Accounting Section -->
        <?php if (can('accounting_view')): ?>
        <div class="nav-section-title px-4 mt-3 mb-1 text-uppercase text-muted <?= !in_array($page, ['accounting', 'expense_report']) ? 'collapsed' : '' ?>" data-bs-toggle="collapse" data-bs-target="#accounting-collapse">
            <span><i class="fas fa-calculator group-icon"></i><span><?= __('accounting') ?></span></span>
            <i class="fas fa-chevron-down chevron"></i>
        </div>
        <div class="collapse <?= in_array($page, ['accounting', 'expense_report']) ? 'show' : '' ?>" id="accounting-collapse">
            <a href="index.php?page=accounting" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'accounting' ? 'active' : '' ?>">
                <i class="fas fa-book-open"></i> <span><?= __('accounting') ?></span>
            </a>
            <a href="index.php?page=accounting&view=trial_balance" class="nav-link <?= isset($_GET['view']) && $_GET['view'] === 'trial_balance' ? 'active' : '' ?>">
                <i class="fas fa-scale-balanced"></i> <span><?= __('trial_balance') ?></span>
            </a>
            <a href="index.php?page=accounting&view=profit_loss" class="nav-link <?= isset($_GET['view']) && $_GET['view'] === 'profit_loss' ? 'active' : '' ?>">
                <i class="fas fa-chart-column"></i> <span><?= __('profit_loss') ?></span>
            </a>
            <a href="index.php?page=accounting&view=balance_sheet" class="nav-link <?= isset($_GET['view']) && $_GET['view'] === 'balance_sheet' ? 'active' : '' ?>">
                <i class="fas fa-file-contract"></i> <span><?= __('balance_sheet') ?></span>
            </a>
             <a href="index.php?page=accounting&view=vat_report" class="nav-link <?= isset($_GET['view']) && $_GET['view'] === 'vat_report' ? 'active' : '' ?>">
                <i class="fas fa-receipt"></i> <span><?= __('vat_report') ?></span>
            </a>
        </div>
        <?php endif; ?>

        <!-- HR Section -->
        <?php if (can('hr_view')): ?>
        <div class="nav-section-title px-4 mt-3 mb-1 text-uppercase text-muted <?= !in_array($page, ['hr_employees', 'hr_departments', 'hr_attendance', 'hr_payroll']) ? 'collapsed' : '' ?>" data-bs-toggle="collapse" data-bs-target="#hr-collapse">
            <span><i class="fas fa-user-tie group-icon"></i><span><?= __('hr') ?></span></span>
            <i class="fas fa-chevron-down chevron"></i>
        </div>
        <div class="collapse <?= in_array($page, ['hr_employees', 'hr_departments', 'hr_attendance', 'hr_payroll']) ? 'show' : '' ?>" id="hr-collapse">
            <a href="index.php?page=hr_departments" class="nav-link <?= $page === 'hr_departments' ? 'active' : '' ?>">
                <i class="fas fa-building-user"></i> <span><?= __('departments') ?></span>
            </a>
            <a href="index.php?page=hr_employees" class="nav-link <?= $page === 'hr_employees' ? 'active' : '' ?>">
                <i class="fas fa-user-badge"></i> <span><?= __('employees') ?></span>
            </a>
            <a href="index.php?page=hr_attendance" class="nav-link <?= $page === 'hr_attendance' ? 'active' : '' ?>">
                <i class="fas fa-user-check"></i> <span><?= __('attendance') ?></span>
            </a>
            <a href="index.php?page=hr_payroll" class="nav-link <?= $page === 'hr_payroll' ? 'active' : '' ?>">
                <i class="fas fa-sack-dollar"></i> <span><?= __('payroll') ?></span>
            </a>
        </div>
        <?php endif; ?>

        <!-- Reports Section -->
        <?php if (can('sales_view') || can('purchases_view') || can('items_view') || can('customers_view') || can('suppliers_view')): ?>
        <div class="nav-section-title px-4 mt-3 mb-1 text-uppercase text-muted <?= !in_array($page, ['customer_statement', 'supplier_statement', 'cashflow_report', 'expense_report', 'expiry_report', 'low_stock_report', 'loyalty_history', 'register_sessions']) ? 'collapsed' : '' ?>" data-bs-toggle="collapse" data-bs-target="#reports-collapse">
            <span><i class="fas fa-chart-line group-icon"></i><span><?= __('reports') ?></span></span>
        </div>
        <div class="collapse <?= in_array($page, ['customer_statement', 'supplier_statement', 'cashflow_report', 'expense_report', 'expiry_report', 'low_stock_report', 'loyalty_history', 'register_sessions', 'register_sessions']) ? 'show' : '' ?>" id="reports-collapse">
            <?php if (can('expenses_view')): ?>
            <a href="index.php?page=expense_report" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'expense_report' ? 'active' : '' ?>">
                <i class="fas fa-file-invoice-dollar"></i> <span><?= __('expense_report') ?></span>
            </a>
            <?php endif; ?>
            <a href="index.php?page=customer_statement" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'customer_statement' ? 'active' : '' ?>">
                <i class="fas fa-file-invoice"></i> <span><?= __('customer_statement') ?></span>
            </a>
            <?php if (can('suppliers_view')): ?>
            <a href="index.php?page=supplier_statement" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'supplier_statement' ? 'active' : '' ?>">
                <i class="fas fa-file-lines"></i> <span><?= __('supplier_statement') ?></span>
            </a>
            <?php endif; ?>
            <?php if (can('accounting_view')): ?>
            <a href="index.php?page=cashflow_report" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'cashflow_report' ? 'active' : '' ?>">
                <i class="fas fa-money-bill-transfer"></i> <span><?= __('cashflow_report') ?></span>
            </a>
            <?php endif; ?>
            <?php if (can('items_view')): ?>
            <a href="index.php?page=expiry_report" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'expiry_report' ? 'active' : '' ?>">
                <i class="fas fa-calendar-xmark"></i> <span><?= __('expiry_report') ?></span>
            </a>
            <a href="index.php?page=low_stock_report" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'low_stock_report' ? 'active' : '' ?>">
                <i class="fas fa-arrow-trend-down"></i> <span><?= __('low_stock_report') ?></span>
            </a>
            <?php endif; ?>
            <?php if (can('customers_view')): ?>
            <a href="index.php?page=loyalty_history" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'loyalty_history' ? 'active' : '' ?>">
                <i class="fas fa-award"></i> <span><?= __('loyalty_history') ?></span>
            </a>
            <?php endif; ?>
            <a href="index.php?page=register_sessions" class="nav-link <?= $page === 'register_sessions' ? 'active' : '' ?>">
                <i class="fas fa-clock-rotate-left"></i> <span><?= __('register_sessions') ?></span>
            </a>
        </div>
        <?php endif; ?>

        <!-- Configurations Section -->
        <?php if (can('settings_view')): ?>
        <div class="nav-section-title px-4 mt-3 mb-1 text-uppercase text-muted <?= !in_array($page, ['payment_methods', 'settings', 'devices']) ? 'collapsed' : '' ?>" data-bs-toggle="collapse" data-bs-target="#config-collapse">
            <span><i class="fas fa-sliders group-icon"></i><span><?= __('settings') ?></span></span>
            <i class="fas fa-chevron-down chevron"></i>
        </div>
        <div class="collapse <?= in_array($page, ['payment_methods', 'settings', 'devices']) ? 'show' : '' ?>" id="config-collapse">
            <a href="index.php?page=payment_methods" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'payment_methods' ? 'active' : '' ?>">
                <i class="fas fa-credit-card"></i> <span><?= __('payment_methods') ?></span>
            </a>
            <a href="index.php?page=devices" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'devices' ? 'active' : '' ?>">
                <i class="fas fa-id-card"></i> <span><?= __('devices') ?></span>
            </a>
            <a href="index.php?page=settings" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'settings' ? 'active' : '' ?>">
                <i class="fas fa-gear"></i> <span><?= __('settings') ?></span>
            </a>
        </div>
        <?php endif; ?>

        <!-- Administrations Section -->
        <?php if (can('users_view')): ?>
        <div class="nav-section-title px-4 mt-3 mb-1 text-uppercase text-muted <?= !in_array($page, ['role_groups', 'users', 'cash_registers', 'scale_devices', 'backups', 'customer_display_settings', 'outlets']) ? 'collapsed' : '' ?>" data-bs-toggle="collapse" data-bs-target="#admin-collapse">
            <span><i class="fas fa-user-gear group-icon"></i><span><?= __('admin') ?></span></span>
            <i class="fas fa-chevron-down chevron"></i>
        </div>
        <div class="collapse <?= in_array($page, ['role_groups', 'users', 'cash_registers', 'scale_devices', 'backups', 'customer_display_settings', 'outlets']) ? 'show' : '' ?>" id="admin-collapse">
            <a href="index.php?page=role_groups" class="nav-link <?= $page === 'role_groups' ? 'active' : '' ?>">
                <i class="fas fa-user-shield"></i> <span><?= __('role_groups') ?></span>
            </a>
            <a href="index.php?page=users" class="nav-link <?= $page === 'users' ? 'active' : '' ?>">
                <i class="fas fa-users-gear"></i> <span><?= __('users') ?></span>
            </a>
            <a href="index.php?page=cash_registers" class="nav-link <?= $page === 'cash_registers' ? 'active' : '' ?>">
                <i class="fas fa-cash-register"></i> <span><?= __('cash_registers') ?></span>
            </a>
            <a href="index.php?page=scale_devices" class="nav-link <?= $page === 'scale_devices' ? 'active' : '' ?>">
                <i class="fas fa-microchip"></i> <span><?= __('scale_devices') ?></span>
            </a>
            <a href="index.php?page=customer_display_settings" class="nav-link <?= $page === 'customer_display_settings' ? 'active' : '' ?>">
                <i class="fas fa-desktop"></i> <span><?= __('customer_display') ?></span>
            </a>
            <a href="index.php?page=backups" class="nav-link <?= $page === 'backups' ? 'active' : '' ?>">
                <i class="fas fa-database"></i> <span><?= __('backups') ?></span>
            </a>
            <a href="index.php?page=outlets" class="nav-link <?= $page === 'outlets' ? 'active' : '' ?>">
                <i class="fas fa-shop"></i> <span>Manage Outlets</span>
            </a>
        </div>
        <?php endif; ?>

        <!-- Version & Logs -->
        <div class="mt-5 px-4 pb-4 border-top pt-4 sidebar-footer">
            <div class="text-muted small fw-bold mb-1">Accounting System</div>
            <div class="d-flex align-items-center justify-content-between text-muted small mb-2">
                <span><i class="bi bi-info-circle me-1"></i> v1.2.5</span>
               
            </div>
            <a href="?page=logs" class="text-decoration-none text-muted small d-block">
                <i class="bi bi-journal-text me-1"></i> <span>System Logs</span>
            </a>
        </div>
    </nav>
</div>

<div class="main-content">
    <header class="topbar">
        <!-- DEBUG: page=<?= $page ?> can_access=<?= $can_access ? 'yes' : 'no' ?> is_activated=<?= $is_activated ? 'yes' : 'no' ?> trial_days=<?= $trial_days ?> -->

        <div class="d-flex align-items-center">
            <button id="sidebarToggle" class="btn btn-link text-dark p-0 me-3 d-xl-none">
                <i class="bi bi-list fs-3"></i>
            </button>
            <h4 class="m-0"><?= __($page) ?></h4>
        </div>
        <div class="d-flex align-items-center">
            <?php 
            $purchaseAlerts = getPurchaseAlerts();
            if (!empty($purchaseAlerts)): 
            ?>
            <div class="dropdown me-3">
                <button class="btn btn-outline-danger btn-sm position-relative" type="button" data-bs-toggle="dropdown">
                    <i class="fas fa-bell"></i>
                    <span class="position-absolute top-0 start-100 translate-middle badge rounded-pill bg-danger">
                        <?= count($purchaseAlerts) ?>
                    </span>
                </button>
                <div class="dropdown-menu dropdown-menu-end shadow border-0 p-0" style="width: 300px;">
                    <div class="p-3 border-bottom bg-light">
                        <h6 class="m-0 fw-bold"><?= $lang === 'ar' ? 'تنبيهات المدفوعات' : 'Payment Alerts' ?></h6>
                    </div>
                    <div class="list-group list-group-flush" style="max-height: 300px; overflow-y: auto;">
                        <?php foreach ($purchaseAlerts as $alert): 
                            $isOverdue = strtotime($alert['due_date']) < time();
                        ?>
                        <a href="index.php?page=purchases&search=<?= $alert['id'] ?>" class="list-group-item list-group-item-action p-3">
                            <div class="d-flex justify-content-between align-items-center mb-1">
                                <span class="badge <?= $isOverdue ? 'bg-danger' : 'bg-warning text-dark' ?>">
                                    <?= $isOverdue ? ($lang === 'ar' ? 'متأخر' : 'Overdue') : ($lang === 'ar' ? 'مستحق قريباً' : 'Due Soon') ?>
                                </span>
                                <small class="text-muted"><?= htmlspecialchars($alert['due_date']) ?></small>
                            </div>
                            <div class="fw-bold small"><?= htmlspecialchars($alert['supplier_name']) ?></div>
                            <div class="text-primary small">OMR <?= number_format($alert['total_with_vat'], 3) ?></div>
                        </a>
                        <?php endforeach; ?>
                    </div>
                </div>
            </div>
            <?php endif; ?>
            <div class="dropdown me-3">
                <button class="btn btn-outline-secondary btn-sm dropdown-toggle" type="button" data-bs-toggle="dropdown">
                    <i class="bi bi-palette"></i> <span><?= $lang === 'ar' ? 'المظهر' : 'Theme' ?></span>
                </button>
                <ul class="dropdown-menu shadow-sm border-0">
                    <li><a class="dropdown-item d-flex align-items-center theme-select" href="#" data-theme="default"><span class="rounded-circle me-2" style="width:12px; height:12px; background:#0f172a;"></span> <?= $lang === 'ar' ? 'الافتراضي' : 'Default' ?></a></li>
                    <li><a class="dropdown-item d-flex align-items-center theme-select" href="#" data-theme="dark"><span class="rounded-circle me-2" style="width:12px; height:12px; background:#1e293b;"></span> <?= $lang === 'ar' ? 'ليلي' : 'Midnight' ?></a></li>
                    <li><a class="dropdown-item d-flex align-items-center theme-select" href="#" data-theme="ocean"><span class="rounded-circle me-2" style="width:12px; height:12px; background:#083344;"></span> <?= $lang === 'ar' ? 'محيط' : 'Ocean' ?></a></li>
                    <li><a class="dropdown-item d-flex align-items-center theme-select" href="#" data-theme="forest"><span class="rounded-circle me-2" style="width:12px; height:12px; background:#064e3b;"></span> <?= $lang === 'ar' ? 'غابة' : 'Forest' ?></a></li>
                    <li><a class="dropdown-item d-flex align-items-center theme-select" href="#" data-theme="sunset"><span class="rounded-circle me-2" style="width:12px; height:12px; background:#451a03;"></span> <?= $lang === 'ar' ? 'غروب' : 'Sunset' ?></a></li>
                    <li><a class="dropdown-item d-flex align-items-center theme-select" href="#" data-theme="nord"><span class="rounded-circle me-2" style="width:12px; height:12px; background:#88c0d0;"></span> <?= $lang === 'ar' ? 'نورد' : 'Nord' ?></a></li>
                    <li><a class="dropdown-item d-flex align-items-center theme-select" href="#" data-theme="dracula"><span class="rounded-circle me-2" style="width:12px; height:12px; background:#bd93f9;"></span> <?= $lang === 'ar' ? 'دراكولا' : 'Dracula' ?></a></li>
                    <li><a class="dropdown-item d-flex align-items-center theme-select" href="#" data-theme="citrus"><span class="rounded-circle me-2" style="width:12px; height:12px; background:#84cc16;"></span> <?= $lang === 'ar' ? 'حمضيات' : 'Citrus' ?></a></li>
                </ul>
            </div>
            <a href="?lang=<?= $lang === 'ar' ? 'en' : 'ar' ?>" class="btn btn-outline-secondary btn-sm me-3">
                <i class="bi bi-translate"></i> <span><?= $lang === 'ar' ? 'English' : 'العربية' ?></span>
            </a>
            <div class="dropdown d-flex align-items-center">
                <!-- Outlet Switcher -->
            <?php 
            $user_outlets_list = $_SESSION['user_outlets'] ?? [1];
            $is_admin = ($_SESSION['user_role_name'] ?? '') === 'Administrator';
            
            if (count($user_outlets_list) > 1 || $is_admin): 
                $current_oid = current_outlet_id();
                $current_oname = $current_oid === -1 ? (__('All Outlets') ?: 'All Outlets') : (db()->query("SELECT name FROM outlets WHERE id = $current_oid")->fetchColumn() ?: 'Outlet ' . $current_oid);
            ?>
            <div class="dropdown d-inline-block me-3">
                <button class="btn btn-outline-secondary dropdown-toggle btn-sm" type="button" data-bs-toggle="dropdown">
                    <i class="fas fa-store me-1"></i> <?= htmlspecialchars($current_oname) ?>
                </button>
                <ul class="dropdown-menu dropdown-menu-end">
                    <li><a class="dropdown-item <?= $current_oid == -1 ? 'active' : '' ?>" href="index.php?action=switch_outlet&id=-1"><?= __('All Outlets') ?: 'All Outlets' ?></a></li>
                    <li><hr class="dropdown-divider"></li>
                    <?php 
                    $availOutlets = $user_outlets_list;
                    if ($is_admin) {
                        $availOutlets = db()->query("SELECT id FROM outlets WHERE status='active'")->fetchAll(PDO::FETCH_COLUMN);
                    }
                    foreach($availOutlets as $oid): 
                        $oname = db()->query("SELECT name FROM outlets WHERE id=$oid")->fetchColumn();
                    ?>
                    <li>
                        <a class="dropdown-item <?= $oid == $current_oid ? 'active' : '' ?>" href="index.php?action=switch_outlet&id=<?= $oid ?>">
                            <?= htmlspecialchars($oname) ?>
                        </a>
                    </li>
                    <?php endforeach; ?>
                </ul>
            </div>
            <?php endif; ?>
            <div class="me-3 d-none d-md-block text-end">
                <div class="fw-bold small">
                    <a href="index.php?page=my_profile" class="text-dark text-decoration-none">
                        <?= htmlspecialchars((string)($_SESSION['username'] ?? 'User')) ?>
                    </a>
                </div>
                <div class="text-muted" style="font-size: 0.7rem;"><?= htmlspecialchars((string)($_SESSION['user_role_name'] ?? '')) ?></div>
            </div>

            <a href="index.php?page=my_profile" class="btn btn-light rounded-circle p-0 overflow-hidden shadow-sm d-inline-block position-relative" style="width: 40px; height: 40px;" title="<?= __('edit') ?>">
                    <?php if (!empty($_SESSION['profile_pic'])): ?>
                        <img src="<?= htmlspecialchars($_SESSION['profile_pic']) ?>?v=<?= time() ?>" alt="Profile" style="width: 100%; height: 100%; object-fit: cover;">
                    <?php else: ?>
                        <i class="bi bi-person fs-5" style="line-height: 40px;"></i>
                    <?php endif; ?>
                    <span class="position-absolute bottom-0 end-0 bg-primary rounded-circle text-white d-flex align-items-center justify-content-center" style="width: 15px; height: 15px; font-size: 0.6rem;">
                        <i class="bi bi-pencil-fill"></i>
                    </span>
                </a>
                <button class="btn btn-link text-dark p-0 ms-1" type="button" data-bs-toggle="dropdown">
                    <i class="bi bi-chevron-down small"></i>
                </button>
                <ul class="dropdown-menu dropdown-menu-end border-0 shadow-sm rounded-3 mt-2">
                    <li><a class="dropdown-item py-2" href="index.php?page=my_profile"><i class="bi bi-person-badge me-2"></i> <?= $lang === 'ar' ? 'ملفي الشخصي' : 'My Profile' ?></a></li>
                    <li><a class="dropdown-item py-2" href="index.php?page=settings"><i class="bi bi-gear me-2"></i> <?= $lang === 'ar' ? 'إعدادات الشركة' : 'Company Settings' ?></a></li>
                    <li><hr class="dropdown-divider"></li>
                    <li><a class="dropdown-item py-2 text-danger" href="index.php?action=logout"><i class="bi bi-box-arrow-right me-2"></i> <?= __('logout') ?></a></li>
                </ul>
            </div>
        </div>
    </header>

    <script>
        const companySettings = <?= json_encode($data['settings']) ?>;
    </script>

    <?php if ($message): ?>
        <script>
            document.addEventListener('DOMContentLoaded', function() {
                let msg = <?= json_encode($message) ?>;
                let type = 'success';
                let title = 'Success';

                if (msg.toLowerCase().includes('error') || msg.toLowerCase().includes('failed')) {
                    type = 'error';
                    title = 'Error';
                }

                Swal.fire({
                    icon: type,
                    title: title,
                    text: msg,
                    timer: 3000,
                    timerProgressBar: true,
                    showConfirmButton: false
                });
            });
        </script>
    <?php endif; ?>
    <?php if ($page === 'dashboard'): ?>
    
    <?php if (can('dashboard_view')): ?>
    <?php 
    $purchaseAlertsCount = count(getPurchaseAlerts());
    if ($data['stats']['expired_items'] > 0 || $data['stats']['near_expiry_items'] > 0 || $data['stats']['low_stock_items_count'] > 0 || $purchaseAlertsCount > 0): ?>
    <div class="row mb-4">
        <div class="col-12">
            <div class="alert alert-warning border-0 shadow-sm d-flex align-items-center mb-0">
                <i class="bi bi-exclamation-triangle-fill h4 mb-0 me-3 text-warning"></i>
                <div class="flex-grow-1">
                    <span data-en="Administrative Alerts:" data-ar="تنبيهات إدارية:"><strong>Administrative Alerts:</strong></span>
                    <?php if ($data['stats']['expired_items'] > 0): ?>
                        <span class="ms-2" data-en="<?= $data['stats']['expired_items'] ?> items have expired." data-ar="هنالك <?= $data['stats']['expired_items'] ?> صنف منتهي الصلاحية."><?= $data['stats']['expired_items'] ?> items have expired.</span>
                    <?php endif; ?>
                    <?php if ($data['stats']['near_expiry_items'] > 0): ?>
                        <span class="ms-2" data-en="<?= $data['stats']['near_expiry_items'] ?> items are expiring soon." data-ar="هنالك <?= $data['stats']['near_expiry_items'] ?> صنف ستنتهي صلاحيتها قريباً."><?= $data['stats']['near_expiry_items'] ?> items are expiring soon.</span>
                    <?php endif; ?>
                    <?php if ($data['stats']['low_stock_items_count'] > 0): ?>
                        <span class="ms-2" data-en="<?= $data['stats']['low_stock_items_count'] ?> items are below minimum level." data-ar="هنالك <?= $data['stats']['low_stock_items_count'] ?> صنف تحت الحد الأدنى للمخزون."><?= $data['stats']['low_stock_items_count'] ?> items are below minimum level.</span>
                    <?php endif; ?>
                    <?php if ($purchaseAlertsCount > 0): ?>
                        <span class="ms-2 text-danger fw-bold" data-en="<?= $purchaseAlertsCount ?> purchase invoices are due or overdue." data-ar="هنالك <?= $purchaseAlertsCount ?> فاتورة مشتريات مستحقة أو متأخرة."><?= $purchaseAlertsCount ?> purchase invoices are due or overdue.</span>
                    <?php endif; ?>
                </div>
                <div class="d-flex gap-2">
                    <?php if ($purchaseAlertsCount > 0): ?>
                        <a href="index.php?page=purchases" class="btn btn-primary btn-sm" data-en="View Purchases" data-ar="عرض المشتريات">View Purchases</a>
                    <?php endif; ?>
                    <a href="index.php?page=expiry_report" class="btn btn-warning btn-sm" data-en="Expiry Report" data-ar="تقرير الانتهاء">Expiry Report</a>
                    <a href="index.php?page=low_stock_report" class="btn btn-danger btn-sm" data-en="Low Stock Report" data-ar="تقرير النواقص">Low Stock Report</a>
                </div>
            </div>
        </div>
    </div>
    <?php endif; ?>

    <div class="row g-4 mb-4">
        <div class="col-md-3">
            <div class="card p-3 border-start border-primary border-4 h-100">
                <div class="d-flex align-items-center">
                    <div class="flex-grow-1">
                        <div class="text-muted small"><?= __('total_sales') ?></div>
                        <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_sales'] ?? 0), 3) ?></div>
                    </div>
                    <div class="ms-3">
                        <i class="bi bi-cart h2 text-primary op-50"></i>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card p-3 border-start border-warning border-4 h-100">
                <div class="d-flex align-items-center">
                    <div class="flex-grow-1">
                        <div class="text-muted small"><?= __('total_received') ?></div>
                        <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_received'] ?? 0), 3) ?></div>
                    </div>
                    <div class="ms-3">
                        <i class="bi bi-cash-stack h2 text-warning op-50"></i>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card p-3 border-start border-danger border-4 h-100">
                <div class="d-flex align-items-center">
                    <div class="flex-grow-1">
                        <div class="text-muted small"><?= __('customer_due') ?></div>
                        <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_receivable'] ?? 0), 3) ?></div>
                    </div>
                    <div class="ms-3">
                        <i class="bi bi-person-exclamation h2 text-danger op-50"></i>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card p-3 border-start border-dark border-4 h-100 bg-light">
                <div class="d-flex align-items-center">
                    <div class="flex-grow-1">
                        <div class="text-muted small"><?= __('total_purchases') ?></div>
                        <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_purchases'] ?? 0), 3) ?></div>
                    </div>
                    <div class="ms-3">
                        <i class="bi bi-bag h2 text-dark op-50"></i>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <div class="row g-4 mb-4">
        <div class="col-md-3">
            <div class="card p-3 border-start border-info border-4 h-100 bg-light">
                <div class="d-flex align-items-center">
                    <div class="flex-grow-1">
                        <div class="text-muted small"><?= __('total_paid') ?></div>
                        <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_paid'] ?? 0), 3) ?></div>
                    </div>
                    <div class="ms-3">
                        <i class="bi bi-wallet2 h2 text-info op-50"></i>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card p-3 border-start border-secondary border-4 h-100 bg-light">
                <div class="d-flex align-items-center">
                    <div class="flex-grow-1">
                        <div class="text-muted small"><?= __('supplier_due') ?></div>
                        <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_payable'] ?? 0), 3) ?></div>
                    </div>
                    <div class="ms-3">
                        <i class="bi bi-truck h2 text-secondary op-50"></i>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card p-3 border-start border-success border-4 h-100">
                <div class="d-flex align-items-center">
                    <div class="flex-grow-1">
                        <div class="text-muted small"><?= __('total_customers') ?></div>
                        <div class="h4 m-0"><?= (int)($data['stats']['total_customers'] ?? 0) ?></div>
                    </div>
                    <div class="ms-3">
                        <i class="bi bi-people h2 text-success op-50"></i>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card p-3 border-start border-info border-4 h-100">
                <div class="d-flex align-items-center">
                    <div class="flex-grow-1">
                        <div class="text-muted small" data-en="Total Items" data-ar="إجمالي الأصناف">Total Items</div>
                        <div class="h4 m-0"><?= (int)($data['stats']['total_items'] ?? 0) ?></div>
                    </div>
                    <div class="ms-3">
                        <i class="bi bi-box-seam h2 text-info op-50"></i>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <div class="row g-4 mb-4">
        <div class="col-12">
            <div class="card p-4">
                <div class="d-flex justify-content-between align-items-center mb-4">
                    <h5 class="m-0" data-en="Sales Performance" data-ar="أداء المبيعات">Sales Performance</h5>
                    <div class="btn-group btn-group-sm">
                        <button type="button" class="btn btn-outline-primary active" id="btnMonthly" data-en="Monthly" data-ar="شهري">Monthly</button>
                        <button type="button" class="btn btn-outline-primary" id="btnYearly" data-en="Yearly" data-ar="سنوي">Yearly</button>
                    </div>
                </div>
                <div style="height: 300px;">
                    <canvas id="salesChart"></canvas>
                </div>
            </div>
        </div>
    </div>

    <div class="row">
        <div class="col-md-8">
            <div class="card p-4">
                <div class="d-flex justify-content-between align-items-center mb-4">
                    <h5 class="m-0" data-en="Recent Customers" data-ar="العملاء الحاليين">Recent Customers</h5>
                    <a href="index.php?page=customers" class="btn btn-outline-primary btn-sm">
                        <span data-en="View All" data-ar="عرض الكل">View All</span>
                    </a>
                </div>
        <div class="table-responsive">
            <table class="table table-hover table-bordered align-middle">
                        <thead>
                            <tr>
                                <th data-en="Name" data-ar="الاسم">Name</th>
                                <th data-en="Phone" data-ar="الهاتف">Phone</th>
                                <th data-en="Balance" data-ar="الرصيد" class="text-end">Balance</th>
                            </tr>
                        </thead>
                        <tbody>
                            <?php foreach ($data['customers'] as $c): ?>
                            <tr>
                                <td><?= htmlspecialchars((string)($c['name'] ?? '')) ?></td>
                                <td><?= htmlspecialchars((string)($c['phone'] ?? '')) ?></td>
                        <td class="text-end" data-en="OMR <?= number_format((float)$c['balance'], 3) ?>" data-ar="<?= number_format((float)$c['balance'], 3) ?> ر.ع."><?= $lang === 'ar' ? number_format((float)$c['balance'], 3) . ' ر.ع.' : 'OMR ' . number_format((float)$c['balance'], 3) ?></td>
                            </tr>
                    <?php endforeach; ?>
                </tbody>

            </table>
                </div>
            </div>
        </div>
        <div class="col-md-4">
            <div class="card p-4">
                <h5 class="mb-4" data-en="Quick Links" data-ar="روابط سريعة">Quick Links</h5>
                <div class="list-group list-group-flush">
                    <button class="list-group-item list-group-item-action border-0 px-0" data-bs-toggle="modal" data-bs-target="#addCustomerModal">
                        <i class="bi bi-person-plus text-primary"></i> <span data-en="Add Customer" data-ar="إضافة عميل">Add Customer</span>
                    </button>
                    <button class="list-group-item list-group-item-action border-0 px-0" data-bs-toggle="modal" data-bs-target="#addItemModal">
                        <i class="bi bi-box-seam text-success"></i> <span data-en="Add Item" data-ar="إضافة صنف">Add Item</span>
                    </button>
                    <button class="list-group-item list-group-item-action border-0 px-0" data-bs-toggle="modal" data-bs-target="#importItemsModal">
                        <i class="bi bi-file-earmark-excel text-success"></i> <span data-en="Import Items" data-ar="استيراد أصناف">Import Items</span>
                    </button>
                    <a href="index.php?page=sales" class="list-group-item list-group-item-action border-0 px-0">
                        <i class="bi bi-cart text-primary"></i> <span data-en="Sales Tax Invoices" data-ar="فواتير المبيعات الضريبية">Sales Tax Invoices</span>
                    </a>
                    <a href="index.php?page=purchases" class="list-group-item list-group-item-action border-0 px-0">
                        <i class="bi bi-bag text-warning"></i> <span data-en="Purchase Tax Invoices" data-ar="فواتير المشتريات الضريبية">Purchase Tax Invoices</span>
                    </a>
                </div>
            </div>
        </div>
    </div>
    <?php else: ?>
    <div class="d-flex flex-column justify-content-center align-items-center h-100" style="min-height: 70vh;">
        <?php if (!empty($data['settings']['company_logo'])): ?>
            <img src="<?= htmlspecialchars($data['settings']['company_logo']) ?>" alt="Company Logo" class="mb-4" style="max-height: 200px; max-width: 350px; object-fit: contain;">
        <?php endif; ?>
        <h1 class="display-4 fw-bold text-muted text-center mt-3"><?= htmlspecialchars($data['settings']['company_name'] ?? 'Company Name') ?></h1>
    </div>
    <?php endif; ?>
    <?php elseif ($page === 'customers' || $page === 'suppliers'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="<?= $currTitle['en'] ?> Management" data-ar="إدارة <?= $currTitle['ar'] ?>"><?= $currTitle['en'] ?> Management</h5>
            <div>
                <?php if (can('customers_add') || can('suppliers_add')): ?>
                <a href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => $page, 'format' => 'excel'])) ?>" class="btn btn-outline-success me-2">
                    <i class="bi bi-file-earmark-excel"></i> <span data-en="Export to Excel" data-ar="تصدير إلى اكسل">Export to Excel</span>
                </a>
                <button class="btn btn-outline-success me-2" data-bs-toggle="modal" data-bs-target="<?= $page === 'suppliers' ? '#importSuppliersModal' : '#importCustomersModal' ?>">
                    <i class="bi bi-file-earmark-excel"></i> <span data-en="Import Excel" data-ar="استيراد من اكسل">Import Excel</span>
                </button>
                <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addCustomerModal">
                    <i class="bi bi-plus-lg"></i> <span data-en="Add <?= $currTitle['en'] ?>" data-ar="إضافة <?= $currTitle['ar'] ?>">Add <?= $currTitle['en'] ?></span>
                </button>
                <?php endif; ?>
            </div>
        </div>

        <!-- Search & Filter Bar -->
        <div class="bg-light p-3 rounded mb-4">
            <form method="GET" class="row g-2 align-items-end">
                <input type="hidden" name="page" value="<?= $page ?>">
                <div class="col-md-4">
                    <label class="form-label small" data-en="Search" data-ar="بحث">Search</label>
                    <input type="text" name="search" class="form-control" value="<?= htmlspecialchars($_GET['search'] ?? '') ?>" placeholder="Name, email, or phone..." data-en="Name, email, or phone..." data-ar="الاسم، البريد، أو الهاتف...">
                </div>
                <div class="col-md-2">
                    <label class="form-label small" data-en="From Date" data-ar="من تاريخ">From Date</label>
                    <input type="date" name="start_date" class="form-control" value="<?= htmlspecialchars($_GET['start_date'] ?? '') ?>">
                </div>
                <div class="col-md-2">
                    <label class="form-label small" data-en="To Date" data-ar="إلى تاريخ">To Date</label>
                    <input type="date" name="end_date" class="form-control" value="<?= htmlspecialchars($_GET['end_date'] ?? '') ?>">
                </div>
                <div class="col-md-4 d-flex gap-1">
                    <button type="submit" class="btn btn-primary flex-grow-1">
                        <i class="bi bi-filter"></i> <span data-en="Filter" data-ar="تصفية">Filter</span>
                    </button>
                    <div class="dropdown d-inline-block">
                        <button class="btn btn-outline-success dropdown-toggle" type="button" data-bs-toggle="dropdown">
                            <i class="bi bi-download"></i> <span data-en="Export" data-ar="تصدير">Export</span>
                        </button>
                        <ul class="dropdown-menu">
                            <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => $page, 'format' => 'csv'])) ?>"><i class="bi bi-filetype-csv me-2"></i> CSV</a></li>
                            <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => $page, 'format' => 'excel'])) ?>"><i class="bi bi-file-earmark-excel me-2"></i> Excel</a></li>
                        </ul>
                    </div>
                    <?php if (!empty($_GET['search']) || !empty($_GET['start_date']) || !empty($_GET['end_date'])): ?>
                    <a href="index.php?page=<?= $page ?>" class="btn btn-outline-secondary">
                        <i class="bi bi-x-lg"></i>
                    </a>
                    <?php endif; ?>
                </div>
            
                <div class="col-md-auto ms-auto d-flex align-items-end mt-2 mt-md-0">
                    <div class="input-group input-group-sm w-auto">
                        <span class="input-group-text" data-en="Limit" data-ar="الحد">Limit</span>
                        <select name="limit" class="form-select" onchange="this.form.submit()">
                            <option value="20" <?= (($_GET['limit'] ?? 20) == 20) ? 'selected' : '' ?>>20</option>
                            <option value="40" <?= (($_GET['limit'] ?? 20) == 40) ? 'selected' : '' ?>>40</option>
                            <option value="60" <?= (($_GET['limit'] ?? 20) == 60) ? 'selected' : '' ?>>60</option>
                            <option value="100" <?= (($_GET['limit'] ?? 20) == 100) ? 'selected' : '' ?>>100</option>
                        </select>
                    </div>
                </div>
            </form>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="Name" data-ar="الاسم">Name</th>
                        <th data-en="Tax ID" data-ar="الرقم الضريبي">Tax ID</th>
                        <th data-en="Email" data-ar="البريد">Email</th>
                        <th data-en="Phone" data-ar="الهاتف">Phone</th>
                        <th data-en="Balance" data-ar="الرصيد" class="text-end">Balance</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['customers'] as $c): ?>
                    <tr>
                        <td><?= htmlspecialchars((string)($c['name'] ?? '')) ?></td>
                        <td><?= htmlspecialchars((string)($c['tax_id'] ?? '---')) ?></td>
                        <td><?= htmlspecialchars((string)($c['email'] ?? '')) ?></td>
                        <td><?= htmlspecialchars((string)($c['phone'] ?? '')) ?></td>
                        <td class="text-end" data-en="OMR <?= number_format((float)$c['balance'], 3) ?>" data-ar="<?= number_format((float)$c['balance'], 3) ?> ر.ع."><?= $lang === 'ar' ? number_format((float)$c['balance'], 3) . ' ر.ع.' : 'OMR ' . number_format((float)$c['balance'], 3) ?></td>
                        <td class="text-end">
                            <div class="btn-group btn-group-sm">
                                <?php if (can('customers_edit') || can('suppliers_edit')): ?>
                                <button class="btn btn-outline-primary" title="Edit" data-bs-toggle="modal" data-bs-target="#editCustomerModal<?= $c['id'] ?>"><i class="bi bi-pencil"></i></button>
                                <?php endif; ?>
                                <?php if (can('customers_delete') || can('suppliers_delete')): ?>
                                <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                    <input type="hidden" name="id" value="<?= $c['id'] ?>">
                                    <button type="submit" name="delete_customer" class="btn btn-outline-danger" title="Delete"><i class="bi bi-trash"></i></button>
                                </form>
                                <?php endif; ?>
                            </div>

                            <!-- Edit Customer Modal -->
                            <div class="modal fade" id="editCustomerModal<?= $c['id'] ?>" tabindex="-1">
                                <div class="modal-dialog">
                                    <div class="modal-content border-0 shadow text-start">
                                        <div class="modal-header">
                                            <h5 class="modal-title">
                                                <span data-en="Edit <?= $currTitle['en'] ?>" data-ar="تعديل <?= $currTitle['ar'] ?>">Edit <?= $currTitle['en'] ?></span>
                                            </h5>
                                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                        </div>
                                        <form method="POST">
                                            <input type="hidden" name="id" value="<?= $c['id'] ?>">
                                            <div class="modal-body">
                                                <div class="mb-3">
                                                    <label class="form-label" data-en="Name" data-ar="الاسم">Name</label>
                                                    <input type="text" name="name" class="form-control" value="<?= htmlspecialchars($c['name']) ?>" required>
                                                </div>
                                                <div class="mb-3">
                                                    <label class="form-label" data-en="Email" data-ar="البريد الإلكتروني">Email</label>
                                                    <input type="email" name="email" class="form-control" value="<?= htmlspecialchars($c['email'] ?? '') ?>">
                                                </div>
                                                <div class="mb-3">
                                                    <label class="form-label" data-en="Phone" data-ar="الهاتف">Phone</label>
                                                    <input type="text" name="phone" class="form-control" value="<?= htmlspecialchars($c['phone'] ?? '') ?>">
                                                </div>
                                                <div class="mb-3">
                                                    <label class="form-label" data-en="Tax ID / VAT No" data-ar="الرقم الضريبي">Tax ID / VAT No</label>
                                                    <input type="text" name="tax_id" class="form-control" value="<?= htmlspecialchars($c['tax_id'] ?? '') ?>">
                                                </div>
                                                <div class="mb-3">
                                                    <label class="form-label" data-en="Balance" data-ar="الرصيد">Balance</label>
                                                    <input type="number" step="0.001" name="balance" class="form-control" value="<?= (float)$c['balance'] ?>">
                                                </div>
                                            </div>
                                            <div class="modal-footer">
                                                <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                                <button type="submit" name="edit_customer" class="btn btn-primary" data-en="Update" data-ar="تحديث">Update</button>
                                            </div>
                                        </form>
                                    </div>
                                </div>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>
    <?php elseif ($page === 'categories'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="Stock Categories Management" data-ar="إدارة فئات المخزون">Stock Categories Management</h5>
            <div>
                <?php if (can('categories_add')): ?>
                <a href="index.php?page=export&type=categories&format=excel" class="btn btn-outline-success me-2">
                    <i class="bi bi-download"></i> <span data-en="Export" data-ar="تصدير">Export</span>
                </a>
                <button class="btn btn-outline-success me-2" data-bs-toggle="modal" data-bs-target="#importCategoriesModal">
                    <i class="bi bi-file-earmark-excel"></i> <span data-en="Import Excel" data-ar="استيراد من اكسل">Import Excel</span>
                </button>
                <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addCategoryModal">
                    <i class="bi bi-plus-lg"></i> <span data-en="Add Category" data-ar="إضافة فئة">Add Category</span>
                </button>
                <?php endif; ?>
            </div>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="ID" data-ar="المعرف">ID</th>
                        <th data-en="Name (EN)" data-ar="الاسم (إنجليزي)">Name (EN)</th>
                        <th data-en="Name (AR)" data-ar="الاسم (عربي)">Name (AR)</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['categories'] as $cat): ?>
                    <tr>
                        <td><?= $cat['id'] ?></td>
                        <td><?= htmlspecialchars($cat['name_en']) ?></td>
                        <td><?= htmlspecialchars($cat['name_ar']) ?></td>
                        <td class="text-end">
                            <div class="btn-group btn-group-sm">
                                <?php if (can('categories_edit')): ?>
                                <button class="btn btn-outline-primary" title="Edit" data-bs-toggle="modal" data-bs-target="#editCatModal<?= $cat['id'] ?>"><i class="bi bi-pencil"></i></button>
                                <?php endif; ?>
                                <?php if (can('categories_delete')): ?>
                                <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                    <input type="hidden" name="id" value="<?= $cat['id'] ?>">
                                    <button type="submit" name="delete_category" class="btn btn-outline-danger" title="Delete"><i class="bi bi-trash"></i></button>
                                </form>
                                <?php endif; ?>
                            </div>

                            <!-- Edit Modal -->
                            <div class="modal fade" id="editCatModal<?= $cat['id'] ?>" tabindex="-1">
                                <div class="modal-dialog">
                                    <div class="modal-content text-start">
                                        <div class="modal-header">
                                            <h5 class="modal-title">Edit Category</h5>
                                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                        </div>
                                        <form method="POST">
                                            <input type="hidden" name="id" value="<?= $cat['id'] ?>">
                                            <div class="modal-body">
                                                <div class="mb-3">
                                                    <label class="form-label">Name (EN)</label>
                                                    <div class="input-group">
                                                        <input type="text" name="name_en" id="edit_cat_name_en_<?= $cat['id'] ?>" class="form-control" value="<?= htmlspecialchars($cat['name_en']) ?>" required>
                                                        <button class="btn btn-outline-secondary btn-translate" type="button" data-source="edit_cat_name_ar_<?= $cat['id'] ?>" data-target="edit_cat_name_en_<?= $cat['id'] ?>" data-to="en">
                                                            <i class="bi bi-translate"></i>
                                                        </button>
                                                    </div>
                                                </div>
                                                <div class="mb-3">
                                                    <label class="form-label">Name (AR)</label>
                                                    <div class="input-group">
                                                        <input type="text" name="name_ar" id="edit_cat_name_ar_<?= $cat['id'] ?>" class="form-control" value="<?= htmlspecialchars($cat['name_ar']) ?>" required>
                                                        <button class="btn btn-outline-secondary btn-translate" type="button" data-source="edit_cat_name_en_<?= $cat['id'] ?>" data-target="edit_cat_name_ar_<?= $cat['id'] ?>" data-to="ar">
                                                            <i class="bi bi-translate"></i>
                                                        </button>
                                                    </div>
                                                </div>
                                            </div>
                                            <div class="modal-footer">
                                                <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                                <button type="submit" name="edit_category" class="btn btn-primary" data-en="Update" data-ar="تحديث">Update</button>
                                            </div>
                                        </form>
                                    </div>
                                </div>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <?php elseif ($page === 'units'): ?>
    <div class="card p-4">
        <div class="d-flex flex-column flex-lg-row justify-content-between align-items-lg-center gap-3 mb-4">
            <div>
                <h5 class="m-0"><span data-en="Units" data-ar="الوحدات">Units</span> (<?= count($data['units'] ?? []) ?>)</h5>
                <p class="text-muted small mb-0" data-en="Manage the English and Arabic unit names used across items, invoices, and reports." data-ar="قم بإدارة أسماء الوحدات بالإنجليزية والعربية المستخدمة في الأصناف والفواتير والتقارير.">Manage the English and Arabic unit names used across items, invoices, and reports.</p>
            </div>
            <?php if (can('units_add')): ?>
            <div class="d-flex flex-wrap gap-2">
                <a href="index.php?page=export&type=units&format=excel" class="btn btn-outline-success">
                    <i class="bi bi-download"></i> <span data-en="Export" data-ar="تصدير">Export</span>
                </a>
                <button class="btn btn-outline-success" data-bs-toggle="modal" data-bs-target="#importUnitsModal">
                    <i class="bi bi-file-earmark-arrow-up"></i> <span data-en="Import" data-ar="استيراد">Import</span>
                </button>
                <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addUnitModal">
                    <i class="bi bi-plus-lg"></i> <span data-en="Add Unit" data-ar="إضافة وحدة">Add Unit</span>
                </button>
            </div>
            <?php endif; ?>
        </div>

        <div class="table-responsive border rounded-3 bg-white">
            <table class="table align-middle units-table mb-0">
                <thead>
                    <tr>
                        <th data-en="Name (EN)" data-ar="الاسم (إنجليزي)">Name (EN)</th>
                        <th data-en="Name (AR)" data-ar="الاسم (عربي)">Name (AR)</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php if (empty($data['units'])): ?>
                    <tr>
                        <td colspan="3" class="text-center py-5">
                            <div class="units-empty-state">
                                <div class="units-empty-state__icon"><i class="bi bi-rulers"></i></div>
                                <h6 class="mb-0" data-en="No units yet" data-ar="لا توجد وحدات بعد">No units yet</h6>
                                <p class="text-muted mb-0" data-en="Add your first unit so items can reuse the same labels in invoices and reports." data-ar="أضف أول وحدة حتى تستخدم الأصناف نفس التسميات في الفواتير والتقارير.">Add your first unit so items can reuse the same labels in invoices and reports.</p>
                                <?php if (can('units_add')): ?>
                                <button class="btn btn-primary mt-2" data-bs-toggle="modal" data-bs-target="#addUnitModal">
                                    <i class="bi bi-plus-lg"></i> <span data-en="Create first unit" data-ar="إنشاء أول وحدة">Create first unit</span>
                                </button>
                                <?php endif; ?>
                            </div>
                        </td>
                    </tr>
                    <?php else: ?>
                    <?php foreach ($data['units'] as $u): ?>
                    <?php
                        $unitNameEn = trim((string)($u['name_en'] ?? ''));
                        $unitNameAr = trim((string)($u['name_ar'] ?? ''));
                    ?>
                    <tr>
                        <td><?= htmlspecialchars($unitNameEn !== '' ? $unitNameEn : '---') ?></td>
                        <td><span lang="ar" dir="rtl" class="d-inline-block"><?= htmlspecialchars($unitNameAr !== '' ? $unitNameAr : '---') ?></span></td>
                        <td class="text-end">
                            <div class="units-actions justify-content-end">
                                <?php if (can('units_edit')): ?>
                                <button class="btn btn-outline-primary btn-sm" title="Edit" data-bs-toggle="modal" data-bs-target="#editUnitModal<?= $u['id'] ?>"><i class="bi bi-pencil"></i></button>
                                <?php endif; ?>
                                <?php if (can('units_delete')): ?>
                                <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                    <input type="hidden" name="id" value="<?= $u['id'] ?>">
                                    <button type="submit" name="delete_unit" class="btn btn-outline-danger btn-sm" title="Delete"><i class="bi bi-trash"></i></button>
                                </form>
                                <?php endif; ?>
                            </div>

                            <div class="modal fade" id="editUnitModal<?= $u['id'] ?>" tabindex="-1">
                                <div class="modal-dialog modal-lg modal-dialog-centered">
                                    <div class="modal-content border-0 shadow-lg text-start unit-modal">
                                        <div class="modal-header">
                                            <div>
                                                <span class="units-modal-kicker" data-en="Refine labels" data-ar="تحسين التسميات">Refine labels</span>
                                                <h5 class="modal-title" data-en="Edit Unit" data-ar="تعديل الوحدة">Edit Unit</h5>
                                                <p class="text-muted small mb-0" data-en="Update the English and Arabic unit names used across stock items and invoices." data-ar="حدّث أسماء الوحدة بالإنجليزية والعربية المستخدمة في الأصناف والفواتير.">Update the English and Arabic unit names used across stock items and invoices.</p>
                                            </div>
                                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                        </div>
                                        <form method="POST">
                                            <input type="hidden" name="id" value="<?= $u['id'] ?>">
                                            <div class="modal-body pt-4">
                                                <div class="unit-form-shell">
                                                    <section class="unit-form-section">
                                                        <div class="unit-form-section__header">
                                                            <div>
                                                                <h6 class="mb-1" data-en="Display names" data-ar="الأسماء الكاملة">Display names</h6>
                                                                <p class="text-muted small mb-0" data-en="Shown in item forms, reports, and detailed views." data-ar="تظهر في نماذج الأصناف والتقارير والعروض التفصيلية.">Shown in item forms, reports, and detailed views.</p>
                                                            </div>
                                                            <span class="units-helper-pill" data-en="Bilingual" data-ar="ثنائي اللغة">Bilingual</span>
                                                        </div>
                                                        <div class="unit-form-grid">
                                                            <div class="unit-field">
                                                                <label class="form-label" data-en="Name (EN)" data-ar="الاسم (إنجليزي)">Name (EN)</label>
                                                                <div class="input-group">
                                                                    <input type="text" name="name_en" id="edit_unit_name_en_<?= $u['id'] ?>" class="form-control" value="<?= htmlspecialchars($unitNameEn) ?>" required>
                                                                    <button class="btn btn-outline-secondary btn-translate" type="button" data-source="edit_unit_name_ar_<?= $u['id'] ?>" data-target="edit_unit_name_en_<?= $u['id'] ?>" data-to="en">
                                                                        <i class="bi bi-translate"></i>
                                                                    </button>
                                                                </div>
                                                                <div class="form-text" data-en="Example: Kilogram" data-ar="مثال: Kilogram">Example: Kilogram</div>
                                                            </div>
                                                            <div class="unit-field">
                                                                <label class="form-label" data-en="Name (AR)" data-ar="الاسم (عربي)">Name (AR)</label>
                                                                <div class="input-group">
                                                                    <input type="text" name="name_ar" id="edit_unit_name_ar_<?= $u['id'] ?>" class="form-control" value="<?= htmlspecialchars($unitNameAr) ?>" required>
                                                                    <button class="btn btn-outline-secondary btn-translate" type="button" data-source="edit_unit_name_en_<?= $u['id'] ?>" data-target="edit_unit_name_ar_<?= $u['id'] ?>" data-to="ar">
                                                                        <i class="bi bi-translate"></i>
                                                                    </button>
                                                                </div>
                                                                <div class="form-text" data-en="Example: كيلوغرام" data-ar="مثال: كيلوغرام">Example: كيلوغرام</div>
                                                            </div>
                                                        </div>
                                                    </section>
                                                    <section class="unit-form-section">
                                                        <div class="unit-form-section__header">
                                                            <div>
                                                                <h6 class="mb-1" data-en="Name preview" data-ar="معاينة الأسماء">Name preview</h6>
                                                                <p class="text-muted small mb-0" data-en="This is how the unit name will appear across the app." data-ar="هكذا سيظهر اسم الوحدة في جميع أجزاء التطبيق.">This is how the unit name will appear across the app.</p>
                                                            </div>
                                                            <span class="units-helper-pill" data-en="Live label" data-ar="التسمية النهائية">Live label</span>
                                                        </div>
                                                        <div class="unit-preview-card mt-0">
                                                            <span class="unit-preview-card__label" data-en="Current preview" data-ar="المعاينة الحالية">Current preview</span>
                                                            <div class="unit-preview-row">
                                                                <span class="unit-preview-chip"><?= htmlspecialchars($unitNameEn !== '' ? $unitNameEn : 'Name (EN)') ?></span>
                                                                <span class="unit-preview-chip"><?= htmlspecialchars($unitNameAr !== '' ? $unitNameAr : 'الاسم') ?></span>
                                                            </div>
                                                        </div>
                                                    </section>
                                                </div>
                                            </div>
                                            <div class="modal-footer pt-0 border-0">
                                                <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                                <button type="submit" name="edit_unit" class="btn btn-primary" data-en="Update" data-ar="تحديث">Update</button>
                                            </div>
                                        </form>
                                    </div>
                                </div>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                    <?php endif; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>


    <?php elseif ($page === 'items'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="Stock Items" data-ar="أصناف المخزون">Stock Items (<?= count($data['items'] ?? []) ?>)</h5>
            <div class="d-flex align-items-center">
                <button class="btn btn-dark me-2" id="bulkBarcodeBtn" style="display:none;" onclick="openAveryModal()">
                    <i class="bi bi-printer"></i> <span data-en="Avery Labels" data-ar="ملصقات إيفري">Avery Labels</span>
                </button>
                <a href="promo-catalog.php" class="btn btn-outline-danger me-2">
                    <i class="bi bi-file-pdf"></i> <span data-en="Promo Catalog" data-ar="كتالوج العروض">Promo Catalog</span>
                </a>
                <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure you want to cancel all active promotions?');">
                    <button type="submit" name="cancel_all_promotions" class="btn btn-outline-danger me-2">
                        <i class="bi bi-x-circle"></i> <span data-en="Cancel All Promotions" data-ar="إلغاء جميع العروض">Cancel All Promotions</span>
                    </button>
                </form>
                <button class="btn btn-outline-success me-2" data-bs-toggle="modal" data-bs-target="#importItemsModal">
                    <i class="bi bi-file-earmark-excel"></i> <span data-en="Import Excel" data-ar="استيراد من اكسل">Import Excel</span>
                </button>
                <a href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => 'items', 'format' => 'excel'])) ?>" class="btn btn-outline-success me-2">
                    <i class="bi bi-file-earmark-excel"></i> <span data-en="Export to Excel" data-ar="تصدير إلى اكسل">Export to Excel</span>
                </a>
                <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addItemModal">
                    <i class="bi bi-plus-lg"></i> <span data-en="Add Item" data-ar="إضافة صنف">Add Item</span>
                </button>
            </div>
        </div>

        <!-- Search Bar -->
        <div class="bg-light p-3 rounded mb-4">
            <form method="GET" class="row g-2 align-items-end">
                <input type="hidden" name="page" value="items">
                <div class="col-md-7">
                    <label class="form-label small" data-en="Search" data-ar="بحث">Search</label>
                    <input type="text" name="search" class="form-control" value="<?= htmlspecialchars($_GET['search'] ?? '') ?>" placeholder="Name or SKU..." data-en="Name or SKU..." data-ar="الاسم أو الباركود...">
                </div>
                <div class="col-md-5 d-flex gap-1">
                    <button type="submit" class="btn btn-primary flex-grow-1">
                        <i class="bi bi-search"></i> <span data-en="Search" data-ar="بحث">Search</span>
                    </button>
                    <div class="dropdown d-inline-block">
                        <button class="btn btn-outline-success dropdown-toggle" type="button" data-bs-toggle="dropdown">
                            <i class="bi bi-download"></i> <span data-en="Export" data-ar="تصدير">Export</span>
                        </button>
                        <ul class="dropdown-menu">
                            <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => 'items', 'format' => 'csv'])) ?>"><i class="bi bi-filetype-csv me-2"></i> CSV</a></li>
                            <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => 'items', 'format' => 'excel'])) ?>"><i class="bi bi-file-earmark-excel me-2"></i> Excel</a></li>
                        </ul>
                    </div>
                    <?php if (!empty($_GET['search'])): ?>
                    <a href="index.php?page=items" class="btn btn-outline-secondary">
                        <i class="bi bi-x-lg"></i>
                    </a>
                    <?php endif; ?>
                </div>
            
                <div class="col-md-auto ms-auto d-flex align-items-end mt-2 mt-md-0">
                    <div class="input-group input-group-sm w-auto">
                        <span class="input-group-text" data-en="Limit" data-ar="الحد">Limit</span>
                        <select name="limit" class="form-select" onchange="this.form.submit()">
                            <option value="20" <?= (($_GET['limit'] ?? 20) == 20) ? 'selected' : '' ?>>20</option>
                            <option value="40" <?= (($_GET['limit'] ?? 20) == 40) ? 'selected' : '' ?>>40</option>
                            <option value="60" <?= (($_GET['limit'] ?? 20) == 60) ? 'selected' : '' ?>>60</option>
                            <option value="100" <?= (($_GET['limit'] ?? 20) == 100) ? 'selected' : '' ?>>100</option>
                        </select>
                    </div>
                </div>
            </form>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th style="width: 40px;"><input type="checkbox" id="selectAllItems" class="form-check-input"></th>
                        <th data-en="Image" data-ar="الصورة">Image</th>
                        <th data-en="SKU" data-ar="الباركود">SKU</th>
                        <th data-en="Name" data-ar="الاسم">Name</th>
                        <th data-en="Category" data-ar="الفئة">Category</th>
                        <th data-en="Supplier" data-ar="المورد">Supplier</th>
                        <th data-en="Stock Level" data-ar="المخزون">Stock Level</th>
                        <th data-en="Expiry" data-ar="تاريخ الانتهاء">Expiry</th>
                        <th data-en="VAT" data-ar="الضريبة">VAT</th>
                        <th data-en="Actions" data-ar="الإجراءات">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['items'] as $item): ?>
                    <tr>
                        <td><input type="checkbox" class="form-check-input item-checkbox" data-id="<?= $item['id'] ?>" data-sku="<?= htmlspecialchars($item['sku']) ?>" data-name-ar="<?= htmlspecialchars($item['name_ar']) ?>" data-name-en="<?= htmlspecialchars($item['name_en']) ?>" data-name="<?= htmlspecialchars($item['name_en'] . ' - ' . $item['name_ar']) ?>" data-price="<?= number_format((float)$item['sale_price'] * (1 + (float)($item['vat_rate'] ?? 0) / 100), 3) ?>"></td>
                        <td>
                            <?php if ($item['image_path']): ?>
                                <img src="<?= htmlspecialchars($item['image_path']) ?>" alt="item" style="width: 40px; height: 40px; object-fit: cover;" class="rounded">
                            <?php else: ?>
                                <div class="bg-light rounded d-flex align-items-center justify-content-center" style="width: 40px; height: 40px;">
                                    <i class="bi bi-image text-muted"></i>
                                </div>
                            <?php endif; ?>
                        </td>
                        <td><?= htmlspecialchars($item['sku']) ?></td>
                        <td>
                            <div class="fw-bold">
                                <?= htmlspecialchars((string)($item['name_en'] ?? '')) ?>
                                <?php if (isset($item['is_promotion']) && $item['is_promotion']): ?>
                                    <span class="badge bg-success ms-1" style="font-size: 0.65rem;" data-en="Promo" data-ar="عرض">Promo</span>
                                <?php endif; ?>
                            </div>
                            <div class="small text-muted"><?= htmlspecialchars((string)($item['name_ar'] ?? '')) ?></div>
                        </td>
                        <td><span data-en="<?= htmlspecialchars((string)($item['cat_en'] ?? '')) ?>" data-ar="<?= htmlspecialchars((string)($item['cat_ar'] ?? '')) ?>"><?= htmlspecialchars((string)($item['cat_en'] ?? '')) ?></span></td>
                        <td><?= htmlspecialchars((string)($item['supplier_name'] ?? '---')) ?></td>
                        <td>
                            <div class="text-end">
                                <strong><?= number_format((float)$item['stock_quantity'], 3) ?></strong>
                                <div class="small text-muted">Min: <?= number_format((float)$item['min_stock_level'], 3) ?></div>
                                <?php if ($item['stock_quantity'] <= $item['min_stock_level']): ?>
                                    <span class="badge bg-danger" data-en="Low Stock" data-ar="مخزون منخفض">Low Stock</span>
                                <?php endif; ?>
                            </div>
                        </td>
                        <td><?= !empty($item['expiry_date']) ? htmlspecialchars((string)$item['expiry_date']) : '---' ?></td>
                        <td><?= number_format((float)$item['vat_rate'], 2) ?>%</td>
                        <td>
                            <div class="btn-group btn-group-sm">
                                <button class="btn btn-outline-info" title="View" data-bs-toggle="modal" data-bs-target="#viewItemModal<?= $item['id'] ?>"><i class="bi bi-eye"></i></button>
                                <button class="btn btn-outline-primary" title="Edit" data-bs-toggle="modal" data-bs-target="#editItemModal<?= $item['id'] ?>"><i class="bi bi-pencil"></i></button>
                                <button class="btn btn-outline-dark" title="Barcode" onclick="printItemBarcode('<?= htmlspecialchars($item['sku']) ?>', '<?= htmlspecialchars($item['name_ar']) ?>', '<?= htmlspecialchars($item['name_en']) ?>', '<?= number_format((float)$item['sale_price'] * (1 + (float)($item['vat_rate'] ?? 0) / 100), 3) ?>')"><i class="bi bi-upc"></i></button>
                                <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                    <input type="hidden" name="id" value="<?= $item['id'] ?>">
                                    <button type="submit" name="delete_item" class="btn btn-outline-danger" title="Delete"><i class="bi bi-trash"></i></button>
                                </form>
                            </div>

                            <!-- View Item Modal -->
                            <div class="modal fade" id="viewItemModal<?= $item['id'] ?>" tabindex="-1">
                                <div class="modal-dialog">
                                    <div class="modal-content border-0 shadow">
                                        <div class="modal-header">
                                            <h5 class="modal-title"><?= htmlspecialchars((string)($item['name_en'] ?? '')) ?></h5>
                                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                        </div>
                                        <div class="modal-body">
                                            <div class="text-center mb-3">
                                                <?php if ($item['image_path']): ?>
                                                    <img src="<?= htmlspecialchars((string)$item['image_path']) ?>" class="img-fluid rounded shadow-sm" style="max-height: 200px;">
                                                <?php else: ?>
                                                    <div class="bg-light rounded d-flex align-items-center justify-content-center mx-auto" style="width: 150px; height: 150px;">
                                                        <i class="bi bi-image text-muted" style="font-size: 3rem;"></i>
                                                    </div>
    <?php endif; ?>
                                            </div>
                                            <table class="table table-sm">
                                                <tr><th class="text-muted">SKU</th><td><?= htmlspecialchars((string)($item['sku'] ?? '')) ?></td></tr>
                                                <tr><th class="text-muted" data-en="Category" data-ar="الفئة">Category</th><td><?= htmlspecialchars($item['cat_en'] ?? '---') ?></td></tr>
                                                <tr><th class="text-muted" data-en="Supplier" data-ar="المورد">Supplier</th><td><?= htmlspecialchars($item['supplier_name'] ?? '---') ?></td></tr>
                                                <tr><th class="text-muted">Sale Price</th><td>OMR <?= number_format((float)$item['sale_price'], 3) ?></td></tr>
                                                <tr><th class="text-muted">Stock Level</th><td><?= number_format((float)$item['stock_quantity'], 3) ?></td></tr>
                                                <tr><th class="text-muted">VAT Rate</th><td><?= number_format((float)$item['vat_rate'], 2) ?>%</td></tr>
                                            </table>
                                        </div>
        

                                        <div class="modal-footer">
                                            <button class="btn btn-outline-dark" onclick="printItemBarcode('<?= htmlspecialchars($item['sku']) ?>', '<?= htmlspecialchars($item['name_ar']) ?>', '<?= htmlspecialchars($item['name_en']) ?>', '<?= number_format((float)$item['sale_price'] * (1 + (float)($item['vat_rate'] ?? 0) / 100), 3) ?>')"><i class="bi bi-printer"></i> Print Barcode</button>
                                            <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Close" data-ar="إغلاق">Close</button>
                                        </div>
                                    </div>
                                </div>
                            </div>

                            <!-- Edit Item Modal -->
                            <div class="modal fade" id="editItemModal<?= $item['id'] ?>" tabindex="-1">
                                <div class="modal-dialog modal-lg">
                                    <div class="modal-content border-0 shadow">
                                        <div class="modal-header">
                                            <h5 class="modal-title" data-en="Edit Item" data-ar="تعديل صنف">Edit Item</h5>
                                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                        </div>
                                        <form method="POST" enctype="multipart/form-data">
                                            <input type="hidden" name="id" value="<?= $item['id'] ?>">
                                            <div class="modal-body">
<div class="form-grid-3">
<div class="col-md-4"><label class="form-label">Name (EN)</label><div class="input-group"><input type="text" name="name_en" id="editItemNameEn<?= $item['id'] ?>" class="form-control" value="<?= htmlspecialchars((string)($item['name_en'] ?? '')) ?>" required><button class="btn btn-outline-secondary btn-translate" type="button" data-source="editItemNameAr<?= $item['id'] ?>" data-target="editItemNameEn<?= $item['id'] ?>" data-to="en"><i class="bi bi-translate"></i> EN</button></div></div>
<div class="col-md-4"><label class="form-label">Name (AR)</label><div class="input-group"><input type="text" name="name_ar" id="editItemNameAr<?= $item['id'] ?>" class="form-control" value="<?= htmlspecialchars((string)($item['name_ar'] ?? '')) ?>" required><button class="btn btn-outline-secondary btn-translate" type="button" data-source="editItemNameEn<?= $item['id'] ?>" data-target="editItemNameAr<?= $item['id'] ?>" data-to="ar"><i class="bi bi-translate"></i> AR</button></div></div>
<div class="col-md-4"><label class="form-label">SKU</label><input type="text" name="sku" class="form-control" value="<?= htmlspecialchars((string)($item['sku'] ?? '')) ?>"><div class="form-text">13-digit scale barcodes with the reserved prefixes are not allowed here. Save the 5-digit scale item code instead.</div></div>
<div class="col-md-4"><label class="form-label" data-en="Category" data-ar="الفئة">Category</label><select name="category_id" class="form-select"><option value="">---</option><?php foreach ($data['categories'] ?? [] as $c): ?><option value="<?= $c['id'] ?>" <?= $c['id'] == $item['category_id'] ? 'selected' : '' ?>><?= htmlspecialchars($c['name_en']) ?></option><?php endforeach; ?></select></div>
<div class="col-md-4"><label class="form-label">Unit</label><select name="unit_id" class="form-select"><option value="">---</option><?php foreach ($data['units'] ?? [] as $u): ?><option value="<?= $u['id'] ?>" <?= $u['id'] == $item['unit_id'] ? 'selected' : '' ?>><?= htmlspecialchars((trim((string)($u['name_en'] ?? '')) !== '' ? $u['name_en'] : ($u['short_name_en'] ?? '---')) . ' / ' . (trim((string)($u['name_ar'] ?? '')) !== '' ? $u['name_ar'] : ($u['short_name_ar'] ?? '---'))) ?></option><?php endforeach; ?></select></div>
<div class="col-md-4"><label class="form-label" data-en="Supplier" data-ar="المورد">Supplier</label><select name="supplier_id" class="form-select"><option value="">---</option><?php foreach ($data['suppliers'] ?? [] as $s): ?><option value="<?= $s['id'] ?>" <?= $s['id'] == $item['supplier_id'] ? 'selected' : '' ?>><?= htmlspecialchars($s['name']) ?></option><?php endforeach; ?></select></div>
<div class="col-md-4"><label class="form-label">Sale Price</label><input type="number" step="0.001" name="sale_price" class="form-control" value="<?= (float)$item['sale_price'] ?>"></div>
<div class="col-md-4"><label class="form-label">Purchase Price</label><input type="number" step="0.001" name="purchase_price" class="form-control" value="<?= (float)$item['purchase_price'] ?>"></div>
<div class="col-md-4"><label class="form-label">Stock Qty</label><input type="number" step="0.001" name="stock_quantity" class="form-control" value="<?= (float)$item['stock_quantity'] ?>"></div>
<div class="col-md-4"><label class="form-label">Min Level</label><input type="number" step="0.001" name="min_stock_level" class="form-control" value="<?= (float)$item['min_stock_level'] ?>"></div>
<div class="col-md-4"><label class="form-label">VAT Rate (%)</label><input type="number" step="0.01" name="vat_rate" class="form-control" value="<?= number_format((float)$item['vat_rate'], 2, '.', '') ?>"></div>
<div class="col-md-4"><label class="form-label">Item Picture</label><input type="file" name="image" class="form-control" accept="image/*"></div>
<div class="col-12 full-width"><hr><h6 data-en="Promotion Details" data-ar="تفاصيل العرض">Promotion Details</h6></div>
<div class="col-md-12 full-width"><div class="form-check form-switch mt-2"><input class="form-check-input isPromotionToggleEdit" type="checkbox" name="is_promotion" value="1" <?= $item['is_promotion'] ? 'checked' : '' ?> id="isPromotionToggleEdit<?= $item['id'] ?>" data-id="<?= $item['id'] ?>"><label class="form-check-label" for="isPromotionToggleEdit<?= $item['id'] ?>" data-en="On Promotion?" data-ar="في العرض؟">On Promotion?</label></div></div>
<div class="col-12 full-width promotionFieldsContainerEdit" id="promotionFieldsContainerEdit<?= $item['id'] ?>" style="display: <?= $item['is_promotion'] ? 'block' : 'none' ?>;"><div class="form-grid-3"><div><label class="form-label">Start Date</label><input type="date" name="promotion_start" class="form-control" value="<?= $item['promotion_start'] ?>"></div><div><label class="form-label">End Date</label><input type="date" name="promotion_end" class="form-control" value="<?= $item['promotion_end'] ?>"></div><div><label class="form-label">Percent (%)</label><input type="number" step="0.01" name="promotion_percent" class="form-control" value="<?= (float)$item['promotion_percent'] ?>"></div></div></div>
</div></div><div class="modal-footer">
                                                <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                                <button type="submit" name="edit_item" class="btn btn-primary">Update Item</button>
                                            </div>
                                        </form>
                                    </div>
                                </div>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <?php elseif ($page === 'expiry_report'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="Expiry Report" data-ar="تقرير انتهاء الصلاحية">Expiry Report</h5>
            <div class="d-flex align-items-center gap-2">
                <div class="dropdown d-inline-block">
                    <button class="btn btn-outline-success btn-sm dropdown-toggle" type="button" data-bs-toggle="dropdown">
                        <i class="bi bi-download"></i> <span data-en="Export" data-ar="تصدير">Export</span>
                    </button>
                    <ul class="dropdown-menu">
                        <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => 'expiry_report', 'format' => 'csv'])) ?>"><i class="bi bi-filetype-csv me-2"></i> CSV</a></li>
                        <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => 'expiry_report', 'format' => 'excel'])) ?>"><i class="bi bi-file-earmark-excel me-2"></i> Excel</a></li>
                    </ul>
                </div>
                <div class="d-flex gap-2">
                    <a href="index.php?page=expiry_report&filter=all" class="btn btn-sm <?= !isset($_GET['filter']) || $_GET['filter'] === 'all' ? 'btn-primary' : 'btn-outline-primary' ?>" data-en="All" data-ar="الكل">All</a>
                    <a href="index.php?page=expiry_report&filter=expired" class="btn btn-sm <?= isset($_GET['filter']) && $_GET['filter'] === 'expired' ? 'btn-danger' : 'btn-outline-danger' ?>" data-en="Expired" data-ar="منتهي">Expired</a>
                    <a href="index.php?page=expiry_report&filter=near_expiry" class="btn btn-sm <?= isset($_GET['filter']) && $_GET['filter'] === 'near_expiry' ? 'btn-warning' : 'btn-outline-warning' ?>" data-en="Near Expiry" data-ar="قريب الانتهاء">Near Expiry</a>
                </div>
            </div>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="SKU" data-ar="الباركود">SKU</th>
                        <th data-en="Item Name" data-ar="اسم الصنف">Item Name</th>
                        <th data-en="Category" data-ar="الفئة">Category</th>
                        <th data-en="Stock Level" data-ar="المخزون">Stock Level</th>
                        <th data-en="Expiry Date" data-ar="تاريخ الانتهاء">Expiry Date</th>
                        <th data-en="Status" data-ar="الحالة">Status</th>
                    </tr>
                </thead>
                <tbody>
                    <?php if (empty($data['expiry_items'])): ?>
                    <tr>
                        <td colspan="6" class="text-center text-muted p-4" data-en="No items found." data-ar="لا توجد أصناف.">No items found.</td>
                    </tr>
                    <?php endif; ?>
                    <?php foreach ($data['expiry_items'] as $item): ?>
                    <?php 
                        $expiry_date = $item['expiry_date'] ?? '';
                        $expiry_ts = $expiry_date !== '' ? strtotime($expiry_date) : null;
                        $is_expired = $expiry_ts ? $expiry_ts <= strtotime(date('Y-m-d')) : false;
                        $is_near = $expiry_ts ? (!$is_expired && $expiry_ts <= strtotime(date('Y-m-d', strtotime('+30 days')))) : false;
                    ?>
                    <tr class="<?= $is_expired ? 'table-danger' : ($is_near ? 'table-warning' : '') ?>">
                        <td><?= htmlspecialchars($item['sku']) ?></td>
                        <td>
                            <div class="fw-bold"><?= htmlspecialchars($item['name_en']) ?></div>
                            <div class="small text-muted"><?= htmlspecialchars($item['name_ar']) ?></div>
                        </td>
                        <td><?= htmlspecialchars($item['cat_en'] ?? '---') ?></td>
                        <td><?= number_format((float)$item['stock_quantity'], 3) ?></td>
                        <td><?= $expiry_date !== '' ? htmlspecialchars((string)$expiry_date) : '---' ?></td>
                        <td>
                            <?php if ($is_expired): ?>
                                <span class="badge bg-danger" data-en="Expired" data-ar="منتهي">Expired</span>
                            <?php elseif ($is_near): ?>
                                <span class="badge bg-warning text-dark" data-en="Near Expiry" data-ar="قريب الانتهاء">Near Expiry</span>
                            <?php else: ?>
                                <span class="badge bg-success" data-en="Good" data-ar="صالح">Good</span>
                            <?php endif; ?>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <?php elseif ($page === 'low_stock_report'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="Low Stock Report" data-ar="تقرير نواقص المخزون">Low Stock Report</h5>
            <button class="btn btn-outline-primary btn-sm d-print-none" onclick="window.print()">
                <i class="bi bi-printer"></i> <span data-en="Print" data-ar="طباعة">Print</span>
            </button>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="SKU" data-ar="الباركود">SKU</th>
                        <th data-en="Item Name" data-ar="اسم الصنف">Item Name</th>
                        <th data-en="Category" data-ar="الفئة">Category</th>
                        <th data-en="Supplier" data-ar="المورد">Supplier</th>
                        <th data-en="Min Level" data-ar="أدنى مستوى">Min Level</th>
                        <th data-en="Current Stock" data-ar="المخزون الحالي">Current Stock</th>
                        <th data-en="Shortage" data-ar="النقص">Shortage</th>
                    </tr>
                </thead>
                <tbody>
                    <?php if (empty($data['low_stock_items'])): ?>
                    <tr>
                        <td colspan="7" class="text-center text-muted p-4" data-en="All items are above minimum levels." data-ar="جميع الأصناف فوق الحد الأدنى.">All items are above minimum levels.</td>
                    </tr>
                    <?php endif; ?>
                    <?php foreach ($data['low_stock_items'] as $item): ?>
                    <?php $shortage = (float)$item['min_stock_level'] - (float)$item['stock_quantity']; ?>
                    <tr class="<?= (float)$item['stock_quantity'] <= 0 ? 'table-danger' : 'table-warning' ?>">
                        <td><?= htmlspecialchars($item['sku']) ?></td>
                        <td>
                            <div class="fw-bold"><?= htmlspecialchars($item['name_en']) ?></div>
                            <div class="small text-muted"><?= htmlspecialchars($item['name_ar']) ?></div>
                        </td>
                        <td><?= htmlspecialchars($item['cat_en'] ?? '---') ?></td>
                        <td><?= htmlspecialchars($item['supplier_name'] ?? '---') ?></td>
                        <td><?= number_format((float)$item['min_stock_level'], 2) ?></td>
                        <td>
                            <span class="badge <?= (float)$item['stock_quantity'] <= 0 ? 'bg-danger' : 'bg-warning text-dark' ?>">
                                <?= number_format((float)$item['stock_quantity'], 3) ?>
                            </span>
                        </td>
                        <td class="fw-bold text-danger"><?= number_format((float)$shortage, 3) ?></td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <?php elseif ($page === 'loyalty_history'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="Loyalty Transaction History" data-ar="سجل عمليات الولاء">Loyalty Transaction History</h5>
            <button class="btn btn-outline-primary btn-sm d-print-none" onclick="window.print()">
                <i class="bi bi-printer"></i> <span data-en="Print" data-ar="طباعة">Print</span>
            </button>
        </div>
        <div class="bg-light p-3 rounded mb-4 d-print-none">
            <form method="GET" class="row g-3 align-items-end">
                <input type="hidden" name="page" value="loyalty_history">
                <div class="col-md-4">
                    <label class="form-label small fw-bold" data-en="Customer" data-ar="العميل">Customer</label>
                    <select name="customer_id" class="form-select select2">
                        <option value="">All Customers</option>
                        <?php foreach ($data['customers_list'] as $c): ?>
                        <option value="<?= $c['id'] ?>" <?= (($_GET['customer_id'] ?? '') == $c['id']) ? 'selected' : '' ?>><?= htmlspecialchars($c['name']) ?></option>
                        <?php endforeach; ?>
                    </select>
                </div>
                <div class="col-md-3">
                    <label class="form-label small fw-bold" data-en="Type" data-ar="النوع">Type</label>
                    <select name="type" class="form-select">
                        <option value="">All Types</option>
                        <option value="earned" <?= (($_GET['type'] ?? '') == 'earned') ? 'selected' : '' ?>>Earned</option>
                        <option value="redeemed" <?= (($_GET['type'] ?? '') == 'redeemed') ? 'selected' : '' ?>>Redeemed</option>
                        <option value="adjustment" <?= (($_GET['type'] ?? '') == 'adjustment') ? 'selected' : '' ?>>Adjustment</option>
                    </select>
                </div>
                <div class="col-md-2">
                    <button type="submit" class="btn btn-primary w-100">
                        <i class="bi bi-filter"></i> <span data-en="Filter" data-ar="تصفية">Filter</span>
                    </button>
                </div>
            </form>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="Date" data-ar="التاريخ">Date</th>
                        <th data-en="Customer" data-ar="العميل">Customer</th>
                        <th data-en="Tier" data-ar="الفئة">Tier</th>
                        <th data-en="Type" data-ar="النوع">Type</th>
                        <th data-en="Points" data-ar="النقاط">Points</th>
                        <th data-en="Description" data-ar="الوصف">Description</th>
                    </tr>
                </thead>
                <tbody>
                    <?php if (empty($data['loyalty_transactions'])): ?>
                    <tr><td colspan="6" class="text-center py-4 text-muted">No transactions found.</td></tr>
                    <?php endif; ?>
                    <?php foreach ($data['loyalty_transactions'] as $lt): ?>
                    <tr>
                        <td><?= date('Y-m-d H:i', strtotime($lt['created_at'])) ?></td>
                        <td>
                            <div class="fw-bold"><?= htmlspecialchars($lt['customer_name']) ?></div>
                            <div class="smaller text-muted">Current Balance: <?= number_format($lt['loyalty_points'], 0) ?> pts</div>
                        </td>
                        <td>
                            <?php 
                                $tier = $lt['loyalty_tier'];
                                $badge = ($tier === 'gold') ? 'bg-warning text-dark' : (($tier === 'silver') ? 'bg-info text-dark' : 'bg-secondary');
                            ?>
                            <span class="badge text-uppercase <?= $badge ?>"><?= $tier ?></span>
                        </td>
                        <td>
                            <?php 
                                $type = $lt['transaction_type'];
                                $typeBadge = ($type === 'earned') ? 'bg-success' : (($type === 'redeemed') ? 'bg-danger' : 'bg-info');
                            ?>
                            <span class="badge <?= $typeBadge ?>"><?= ucfirst($type) ?></span>
                        </td>
                        <td class="fw-bold <?= (float)$lt['points_change'] > 0 ? 'text-success' : 'text-danger' ?>">
                            <?= (float)$lt['points_change'] > 0 ? '+' : '' ?><?= number_format($lt['points_change'], 0) ?>
                        </td>
                        <td class="small"><?= htmlspecialchars($lt['description']) ?></td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <?php elseif ($page === 'pos'): ?>
    <?php
    // Check for active session
    $stmt = db()->prepare("SELECT * FROM register_sessions WHERE user_id = ? AND status = 'open'");
    $stmt->execute([$_SESSION['user_id']]);
    $active_session = $stmt->fetch(PDO::FETCH_ASSOC);
    $_SESSION['register_session_id'] = $active_session['id'] ?? null;

    $registers = db()->query("SELECT * FROM cash_registers WHERE status = 'active'")->fetchAll();
    
    $allow_zero_stock_sell = ($data['settings']['allow_zero_stock_sell'] ?? '1') === '1';
    $oid = current_outlet_id();
    $sql = "SELECT * FROM stock_items WHERE outlet_id = $oid ORDER BY name_en ASC LIMIT 100";
    $products_raw = db()->query($sql)->fetchAll(PDO::FETCH_ASSOC);
    $products = [];
    foreach ($products_raw as $p) {
        $p['original_price'] = (float)$p['sale_price'];
        $p['sale_price'] = getPromotionalPrice($p);
        $products[] = $p;
    }
    $customers = db()->query("SELECT * FROM customers ORDER BY name ASC")->fetchAll(PDO::FETCH_ASSOC);
    ?>
    <div class="pos-container">
        <div class="pos-products">
            <div class="bg-white p-3 rounded mb-3 shadow-sm d-flex gap-2">
                <div class="input-group flex-grow-1">
                    <span class="input-group-text bg-transparent border-end-0"><i class="bi bi-search"></i></span>
                    <input type="text" id="productSearch" class="form-control border-start-0" placeholder="Search products by name or SKU..." data-en="Search products..." data-ar="بحث عن منتجات...">
                </div>
                <div class="input-group flex-grow-1">
                    <span class="input-group-text bg-light border-end-0"><i class="bi bi-upc-scan"></i></span>
                    <input type="text" id="barcodeInput" class="form-control border-start-0" placeholder="Scan barcode..." data-en="Scan barcode..." data-ar="امسح الباركود..." autofocus>
                </div>
                <button class="btn btn-warning d-flex align-items-center gap-2" onclick="cart.openHeldCartsModal()">
                    <i class="bi bi-pause-btn-fill"></i>
                    <span class="d-none d-xl-inline" data-en="Held List" data-ar="قائمة الانتظار">Held List</span>
                </button>
            </div>
            <div class="product-grid" id="productGrid">
                <?php foreach ($products as $p): ?>
                <div class="product-card" data-id="<?= $p['id'] ?>" data-name-en="<?= htmlspecialchars($p['name_en']) ?>" data-name-ar="<?= htmlspecialchars($p['name_ar']) ?>" data-price="<?= $p['sale_price'] ?>" data-sku="<?= htmlspecialchars($p['sku']) ?>" data-stock-quantity="<?= (float)$p['stock_quantity'] ?>" data-vat-rate="<?= $p['vat_rate'] ?>">
                    <?php if ($p['image_path']): ?>
                        <img src="<?= htmlspecialchars($p['image_path']) ?>" alt="<?= htmlspecialchars($p['name_en']) ?>">
                    <?php else: ?>
                        <div class="bg-light d-flex align-items-center justify-content-center rounded mb-2" style="height: 120px;">
                            <i class="bi bi-box-seam text-muted" style="font-size: 3rem;"></i>
                        </div>
                    <?php endif; ?>
                    <div class="mb-1 product-name" data-en="<?= htmlspecialchars($p['name_en']) ?>" data-ar="<?= htmlspecialchars($p['name_ar']) ?>">
                        <?php if(!empty($p['name_ar'])): ?>
                            <div><?= htmlspecialchars($p['name_ar']) ?></div>
                            <div class="small text-secondary" style="font-size: 0.75rem; line-height: 1.1;"><?= htmlspecialchars($p['name_en']) ?></div>
                        <?php else: ?>
                            <div><?= htmlspecialchars($p['name_en']) ?></div>
                        <?php endif; ?>
                    </div>
                    <div class="d-flex justify-content-between align-items-center mt-auto">
                        <div class="d-flex flex-column">
                            <?php if ($p['sale_price'] < $p['original_price']): ?>
                                <span class="text-muted smaller text-decoration-line-through">OMR <?= number_format($p['original_price'], 3) ?></span>
                            <?php endif; ?>
                            <span class="price text-primary fw-bold">OMR <?= number_format((float)$p['sale_price'], 3) ?></span>
                        </div>
                        <span class="badge bg-light text-dark small"><?= (float)$p['stock_quantity'] ?> left</span>
                    </div>
                </div>
                <?php endforeach; ?>
            </div>
        </div>
        
        <div class="pos-cart">
            <div class="p-3 border-bottom d-flex justify-content-between align-items-center">
                <h6 class="m-0 fw-bold"><i class="bi bi-cart3 me-2"></i>Cart</h6>
                <div class="d-flex gap-2">
                    <button class="btn btn-sm btn-outline-info" onclick="window.open('customer-display.php?v=<?= time() ?>', 'CustomerDisplay', 'toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width=' + screen.availWidth + ',height=' + screen.availHeight + ',left=0,top=0')" title="Customer Display"><i class="bi bi-display me-1"></i> Customer Screen</button>
                    <?php if ($active_session): ?>
                    <button class="btn btn-sm btn-outline-dark" data-bs-toggle="modal" data-bs-target="#closeRegisterModal" title="Close Register"><i class="bi bi-x-circle me-1"></i data-en="Close" data-ar="إغلاق">Close</button>
                    <?php endif; ?>
                    <button class="btn btn-sm btn-outline-warning" onclick="cart.openHeldCartsModal()" title="Held List"><i class="bi bi-list-task"></i></button>
                    <button class="btn btn-sm btn-outline-secondary" onclick="cart.hold()" title="Hold Cart"><i class="bi bi-pause-circle"></i></button>
                    <button class="btn btn-sm btn-outline-danger" onclick="cart.clear()" title="Clear Cart"><i class="bi bi-trash"></i></button>
                </div>
            </div>
            
            <div class="p-3 bg-light border-bottom">
                <div class="mb-2">
                    <label class="small fw-bold mb-1" data-en="Customer" data-ar="العميل">Customer</label>
                    <div class="d-flex gap-2">
                        <select id="posCustomer" class="form-select form-select-sm" onchange="cart.onCustomerChange()">
                            <option value="">Walk-in Customer</option>
                            <?php foreach ($customers as $c): ?>
                            <option value="<?= $c['id'] ?>" 
                                    data-points="<?= $c['loyalty_points'] ?>" 
                                    data-tier="<?= $c['loyalty_tier'] ?>" 
                                    data-multiplier="<?= getLoyaltyMultiplier($c['loyalty_tier'] ?? 'bronze') ?>"
                                    data-spent="<?= $c['total_spent'] ?>">
                                <?= htmlspecialchars($c['name']) ?>
                            </option>
                            <?php endforeach; ?>
                        </select>
                        <button class="btn btn-sm btn-primary" data-bs-toggle="modal" data-bs-target="#addCustomerModal"><i class="bi bi-plus"></i></button>
                    </div>
                    <div id="loyaltyDisplay" class="mt-2 p-2 rounded bg-light border border-primary-subtle" style="display:none">
                        <div class="d-flex justify-content-between align-items-center mb-1">
                            <div>
                                <span id="tierBadge" class="badge text-uppercase">Bronze</span>
                                <span class="fw-bold ms-1 text-primary"><span id="customerPoints">0</span> pts</span>
                            </div>
                            <div class="form-check form-switch">
                                <input class="form-check-input" type="checkbox" id="redeemLoyalty" onchange="cart.render()">
                                <label class="form-check-label small fw-bold" for="redeemLoyalty">Redeem</label>
                            </div>
                        </div>
                        <div class="progress" style="height: 4px;">
                            <div id="tierProgress" class="progress-bar bg-primary" role="progressbar" style="width: 0%"></div>
                        </div>
                        <div id="nextTierInfo" class="smaller text-muted mt-1">Spend more to unlock Silver</div>
                    </div>
                </div>
                <div>
                    <label class="small fw-bold mb-1">Discount Code</label>
                    <div class="input-group input-group-sm">
                        <input type="text" id="discountCode" class="form-control" placeholder="Code">
                        <button class="btn btn-outline-primary" type="button" onclick="cart.applyDiscount()">Apply</button>
                    </div>
                    <div id="appliedDiscountInfo" class="smaller text-primary mt-1" style="display:none"></div>
                </div>
            </div>
            
            <div class="cart-items" id="cartItems">
                <!-- Cart items will be injected here -->
                <div class="text-center text-muted mt-5">
                    <i class="bi bi-cart-x" style="font-size: 3rem;"></i>
                    <p>Cart is empty</p>
                </div>
            </div>
            
            <div class="cart-total">
                <div class="d-flex justify-content-between mb-1">
                    <span data-en="Subtotal (Excl. VAT)" data-ar="المجموع (بدون الضريبة)">Subtotal (Excl. VAT)</span>
                    <span id="posSubtotal"><?= __('currency') ?> 0.000</span>
                </div>
                <div class="d-flex justify-content-between mb-1">
                    <span data-en="VAT" data-ar="الضريبة">VAT</span>
                    <span id="posVat"><?= __('currency') ?> 0.000</span>
                </div>
                <div class="d-flex justify-content-between mb-3 fw-bold fs-5 border-top pt-2">
                    <span data-en="Total" data-ar="الإجمالي">Total</span>
                    <span id="posTotal" class="text-primary"><?= __('currency') ?> 0.000</span>
                </div>
                <button class="btn btn-primary w-100 py-2 fw-bold" id="checkoutBtn" onclick="cart.checkout()">
                    PLACE ORDER
                </button>
            </div>
        </div>
    </div>

    <script>
    const cart = {
        items: [],
        discount: null,
        customerPoints: 0,
        selectedPaymentMethod: 'cash',
        payments: [],
        loyaltySettings: {
            enabled: <?= json_encode($data['settings']['loyalty_enabled'] ?? '0') ?>,
            pointsPerUnit: parseFloat(<?= json_encode($data['settings']['loyalty_points_per_unit'] ?? '1') ?>),
            redeemPointsPerUnit: parseFloat(<?= json_encode($data['settings']['loyalty_redeem_points_per_unit'] ?? '100') ?>)
        },
        allCreditCustomers: <?php 
            $custData = [];
            foreach ($customers as $c) {
                $custData[] = [
                    'value' => (string)$c['id'],
                    'text' => $c['name'] . ' (' . ($c['phone'] ?? '') . ')'
                ];
            }
            echo json_encode($custData);
        ?>,
        broadcast() {
            try {
                // Ensure items is an array
                if (!Array.isArray(this.items)) this.items = [];
                
                const subtotal = this.items.reduce((sum, item) => sum + (parseFloat(item.price) * parseFloat(item.qty)), 0);
                const totalVat = this.items.reduce((sum, item) => {
                    const price = parseFloat(item.price) || 0;
                    const qty = parseFloat(item.qty) || 0;
                    const vatRate = (item.vatRate !== undefined && item.vatRate !== null) ? item.vatRate : 0;
                    return sum + (price * qty * (vatRate / (100 + vatRate)));
                }, 0);
                let discountAmount = 0;
                if (this.discount) {
                    discountAmount = this.discount.type === 'percentage' ? subtotal * (parseFloat(this.discount.value) / 100) : parseFloat(this.discount.value);
                }
                const redeemSwitch = document.getElementById('redeemLoyalty');
                const redeemRate = (this.loyaltySettings && this.loyaltySettings.redeemPointsPerUnit) ? this.loyaltySettings.redeemPointsPerUnit : 100;
                let loyaltyRedeemed = (redeemSwitch && redeemSwitch.checked) ? Math.min(Math.max(0, subtotal - discountAmount), (parseFloat(this.customerPoints) || 0) / redeemRate) : 0;
                const total = Math.max(0, subtotal - discountAmount - loyaltyRedeemed);

                const customerSelect = document.getElementById('posCustomer');
                const customerName = customerSelect ? customerSelect.options[customerSelect.selectedIndex].text : '';

                const payload = {
                    items: this.items.map(i => {
                        const price = parseFloat(i.price) || 0;
                        const qty = parseFloat(i.qty) || 0;
                        const vatRate = (i.vatRate !== undefined && i.vatRate !== null) ? i.vatRate : 0;
                        const vatAmount = price * qty * (vatRate / (100 + vatRate));
                        return {
                            name: (function(){ let n = ''; if(i.nameAr) n += '<div>'+i.nameAr+'</div>'; if(i.nameEn) n += '<div>'+i.nameEn+'</div>'; return n || 'Unknown Item'; })(),
                            price: price,
                            qty: qty,
                            vat: vatAmount
                        };
                    }),
                    subtotal: parseFloat(subtotal) || 0,
                    vat: parseFloat(totalVat) || 0,
                    discount: parseFloat(discountAmount) || 0,
                    loyalty: parseFloat(loyaltyRedeemed) || 0,
                    total: parseFloat(total) || 0,
                    currency: "<?= __('currency') ?>",
                    customerName: customerName,
                    theme: document.body.className,
                    timestamp: Date.now()
                };
                
                localStorage.setItem('pos_cart_update', JSON.stringify(payload));
            } catch (e) { console.error('Broadcast error', e); }
        },
        add(product) {
            if (!this.items) this.items = [];
            const allowZeroStock = (typeof companySettings !== 'undefined' && String(companySettings.allow_zero_stock_sell) === '1');
            const currentStock = parseFloat(product.stock_quantity) || 0;
            const addQty = Math.max(parseFloat(product.qty) || 1, 0.001);
            const unitPrice = (product.price !== undefined && product.price !== null) ? (parseFloat(product.price) || 0) : (parseFloat(product.sale_price) || 0);
            const normalizedProduct = {...product, price: unitPrice};

            const existing = this.items.find(item => item.id === product.id);
            if (existing) {
                if (!allowZeroStock && (existing.qty + addQty) > currentStock) {
                    Swal.fire('Error', 'Insufficient stock!', 'error');
                    return;
                }
                existing.qty = Number((existing.qty + addQty).toFixed(3));
                existing.price = unitPrice;
            } else {
                if (!allowZeroStock && currentStock < addQty) {
                    Swal.fire('Error', 'Insufficient stock!', 'error');
                    return;
                }
                this.items.push({...normalizedProduct, qty: Number(addQty.toFixed(3))});
            }

            this.render();
            
            // Add visual feedback
            const lang = document.documentElement.lang || 'en';
            const displayName = lang === 'ar' ? (product.nameAr || product.nameEn) : (product.nameEn || product.nameAr);
            Swal.fire({
                toast: true,
                position: 'top-end',
                icon: 'success',
                title: (lang === 'ar' ? 'تم إضافة: ' : 'Added: ') + displayName,
                showConfirmButton: false,
                timer: 800
            });
        },
        remove(id) {
            this.items = this.items.filter(item => item.id !== id);
            this.render();
        },
        updateQty(id, delta) {
            if (!this.items) return;
            const item = this.items.find(i => i.id === id);
            if (item) {
                const allowZeroStock = (typeof companySettings !== 'undefined' && String(companySettings.allow_zero_stock_sell) === '1');
                const currentStock = parseFloat(item.stock_quantity) || 0;
                
                if (delta > 0 && !allowZeroStock && (item.qty + delta) > currentStock) {
                    Swal.fire('Error', 'Insufficient stock!', 'error');
                    return;
                }

                item.qty += delta;
                if (item.qty <= 0) this.remove(id);
                else this.render();
            }
        },
        clear() {
            this.items = [];
            this.discount = null;
            this.customerPoints = 0;
            const discInput = document.getElementById('discountCode');
            if (discInput) discInput.value = '';
            const discInfo = document.getElementById('appliedDiscountInfo');
            if (discInfo) discInfo.style.display = 'none';
            const redeemSwitch = document.getElementById('redeemLoyalty');
            if (redeemSwitch) redeemSwitch.checked = false;
            const loyaltyDisplay = document.getElementById('loyaltyDisplay');
            if (loyaltyDisplay) loyaltyDisplay.style.display = 'none';
            this.render();
        },
        onCustomerChange() {
            const select = document.getElementById('posCustomer');
            const option = select.options[select.selectedIndex];
            const display = document.getElementById('loyaltyDisplay');
            
            if (!select.value || this.loyaltySettings.enabled !== '1') {
                if (display) display.style.display = 'none';
                this.customerPoints = 0;
                this.customerTier = 'bronze';
                this.customerMultiplier = 1.0;
                const redeemSwitch = document.getElementById('redeemLoyalty');
                if (redeemSwitch) redeemSwitch.checked = false;
                this.render();
                return;
            }
            
            this.customerPoints = parseFloat(option.dataset.points) || 0;
            this.customerTier = option.dataset.tier || 'bronze';
            this.customerMultiplier = parseFloat(option.dataset.multiplier) || 1.0;
            const spent = parseFloat(option.dataset.spent) || 0;
            
            document.getElementById('customerPoints').innerText = Math.floor(this.customerPoints);
            const badge = document.getElementById('tierBadge');
            badge.innerText = this.customerTier;
            badge.className = 'badge text-uppercase ' + (this.customerTier === 'gold' ? 'bg-warning text-dark' : (this.customerTier === 'silver' ? 'bg-info text-dark' : 'bg-secondary'));
            
            const progressBar = document.getElementById('tierProgress');
            const nextTierInfo = document.getElementById('nextTierInfo');
            let progress = 0;
            if (this.customerTier === 'bronze') {
                progress = (spent / 500) * 100;
                nextTierInfo.innerText = `Spend ${(500 - spent).toFixed(3)} OMR more for Silver (1.2x points)`;
            } else if (this.customerTier === 'silver') {
                progress = ((spent - 500) / 1000) * 100;
                nextTierInfo.innerText = `Spend ${(1500 - spent).toFixed(3)} OMR more for Gold (1.5x points)`;
            } else {
                progress = 100;
                nextTierInfo.innerText = 'You are a Gold member! (1.5x points)';
            }
            progressBar.style.width = Math.min(100, progress) + '%';
            
            display.style.display = 'block';
            this.render();
        },
        async applyDiscount() {
            const code = document.getElementById('discountCode').value.trim();
            if (!code) return;
            try {
                const resp = await fetch(`index.php?action=validate_discount&code=${code}`);
                const res = await resp.json();
                if (res.success) {
                    this.discount = res.discount;
                    const info = document.getElementById('appliedDiscountInfo');
                    info.innerText = `Applied: ${this.discount.code} (${this.discount.type === 'percentage' ? this.discount.value + '%' : 'OMR ' + parseFloat(this.discount.value).toFixed(3)})`;
                    info.style.display = 'block';
                    this.render();
                } else {
                    Swal.fire('Error', res.error, 'error');
                }
            } catch (err) { console.error(err); }
        },
        async hold() {
            if (this.items.length === 0) return;
            const { value: name } = await Swal.fire({
                title: 'Hold Cart',
                input: 'text',
                inputLabel: 'Enter a name for this cart',
                inputValue: 'Cart ' + new Date().toLocaleTimeString(),
                showCancelButton: true
            });
            if (name) {
                const formData = new FormData();
                formData.append('action', 'hold_pos_cart');
                formData.append('cart_name', name);
                formData.append('items', JSON.stringify(this.items));
                formData.append('customer_id', document.getElementById('posCustomer').value);
                const resp = await fetch('index.php', { method: 'POST', body: formData });
                const res = await resp.json();
                if (res.success) {
                    this.clear();
                    Swal.fire('Held', 'Cart has been parked', 'success');
                }
            }
        },
        async openHeldCartsModal() {
            try {
                const resp = await fetch('index.php?action=get_held_carts');
                const text = await resp.text();
                let carts;
                try {
                    carts = JSON.parse(text);
                } catch (e) {
                    console.error('Failed to parse held carts:', text);
                    throw new Error('Invalid server response');
                }
                const lang = document.documentElement.lang || 'en';
                let html = '<div class="list-group list-group-flush shadow-sm rounded">';
                if (carts.length === 0) {
                    html += `
                        <div class="text-center p-5 text-muted">
                            <i class="bi bi-folder2-open mb-3 d-block" style="font-size: 3rem;"></i>
                            <p data-en="No held carts found" data-ar="لا توجد طلبات معلقة">${lang === 'ar' ? 'لا توجد طلبات معلقة' : 'No held carts found'}</p>
                        </div>`;
                }
                carts.forEach(c => {
                    html += `
                        <div class="list-group-item d-flex justify-content-between align-items-center p-3 hover-bg-light border-start-0 border-end-0">
                            <div class="text-start">
                                <div class="fw-bold text-primary">${c.cart_name}</div>
                                <div class="small text-muted">
                                    <i class="bi bi-person me-1"></i>${c.customer_name || (lang === 'ar' ? 'عميل عابر' : 'Walk-in')}
                                    <span class="mx-2 text-silver">|</span>
                                    <i class="bi bi-clock me-1"></i>${new Date(c.created_at).toLocaleString()}
                                </div>
                            </div>
                            <div class="btn-group">
                                <button class="btn btn-sm btn-primary" onclick="cart.resume(${c.id})">
                                    <i class="bi bi-arrow-repeat me-1"></i><span data-en="Resume" data-ar="استرجاع">${lang === 'ar' ? 'استرجاع' : 'Resume'}</span>
                                </button>
                                <button class="btn btn-sm btn-outline-danger" onclick="cart.deleteHeld(${c.id})">
                                    <i class="bi bi-trash"></i>
                                </button>
                            </div>
                        </div>
                    `;
                });
                html += '</div>';
                Swal.fire({
                    title: lang === 'ar' ? 'الطلبات المعلقة' : 'Held Carts',
                    html: html,
                    showConfirmButton: false,
                    width: '700px',
                    customClass: {
                        container: 'held-carts-swal'
                    }
                });
            } catch (err) {
                console.error(err);
                Swal.fire('Error', 'Failed to load held carts: ' + err.message, 'error');
            }
        },
        async resume(id) {
            try {
                const resp = await fetch('index.php?action=get_held_carts');
                const carts = await resp.json();
                const c = carts.find(x => x.id == id);
                if (c) {
                    this.items = JSON.parse(c.items_json);
                    document.getElementById('posCustomer').value = c.customer_id || '';
                    await this.onCustomerChange();
                    await this.deleteHeld(id, true);
                    Swal.close();
                }
            } catch (err) {
                console.error(err);
                Swal.fire('Error', 'Failed to resume cart', 'error');
            }
        },
        async deleteHeld(id, silent = false) {
            const formData = new FormData();
            formData.append('action', 'delete_held_cart');
            formData.append('id', id);
            await fetch('index.php', { method: 'POST', body: formData });
            if (!silent) this.openHeldCartsModal();
        },
        render() {
            try {
                const container = document.getElementById('cartItems');
                if (!container) return;

                const lang = document.documentElement.lang || 'en';
                const items = Array.isArray(this.items) ? this.items : [];

                if (items.length === 0) {
                    container.innerHTML = `<div class="text-center text-muted mt-5"><i class="bi bi-cart-x" style="font-size: 3rem;"></i><p data-en="Cart is empty" data-ar="السلة فارغة">${lang === 'ar' ? 'السلة فارغة' : 'Cart is empty'}</p></div>`;
                    const subtotalEl = document.getElementById('posSubtotal');
                    const totalEl = document.getElementById('posTotal');
                    const checkoutBtn = document.getElementById('checkoutBtn');
                    
                    if (subtotalEl) subtotalEl.innerText = '<?= __('currency') ?> 0.000';
                    if (totalEl) totalEl.innerText = '<?= __('currency') ?> 0.000';
                    if (checkoutBtn) checkoutBtn.disabled = true;
                    this.broadcast();
                    return;
                }
                
                let subtotal = 0;
                let totalVat = 0;
                container.innerHTML = items.map(item => {
                    const price = parseFloat(item.price) || 0;
                    const qty = parseFloat(item.qty) || 0;
                    const itemTotal = price * qty;
                    subtotal += itemTotal;
                    const vatRate = (item.vatRate !== undefined && item.vatRate !== null) ? item.vatRate : 0;
                    const itemVat = itemTotal * (vatRate / (100 + vatRate));
                    totalVat += itemVat;
                    
                    let nameHtml = '';
                    if (item.nameAr) nameHtml += `<div>${item.nameAr}</div>`;
                    if (item.nameEn) nameHtml += `<div>${item.nameEn}</div>`;
                    if (!nameHtml) nameHtml = '<div>' + (item.nameAr || item.nameEn || 'Unknown Item') + '</div>';
                    
                    return `
                        <div class="cart-item">
                            <div class="flex-grow-1">
                                <div class="small">${nameHtml}</div>
                                <div class="text-muted smaller"><?= __('currency') ?> ${price.toFixed(3)} <span class="badge bg-light text-dark smaller">VAT ${parseFloat(vatRate || 0).toFixed(2)}%</span></div>
                            </div>
                            <div class="qty-controls mx-3">
                                <button class="qty-btn" onclick="cart.updateQty(${item.id}, -1)">-</button>
                                <span class="small fw-bold">${qty}</span>
                                <button class="qty-btn" onclick="cart.updateQty(${item.id}, 1)">+</button>
                            </div>
                            <div class="text-end" style="min-width: 80px;">
                                <div class="fw-bold small"><?= __('currency') ?> ${itemTotal.toFixed(3)}</div>
                                <div class="smaller text-muted">VAT: ${itemVat.toFixed(2)}</div>
                            </div>
                        </div>
                    `;
                }).join('');
                
                let discountAmount = 0;
                if (this.discount) {
                    if (this.discount.type === 'percentage') {
                        discountAmount = subtotal * (parseFloat(this.discount.value) / 100);
                    } else {
                        discountAmount = parseFloat(this.discount.value);
                    }
                }

                let loyaltyRedeemedValue = 0;
                const redeemSwitch = document.getElementById('redeemLoyalty');
                if (redeemSwitch && redeemSwitch.checked) {
                    const maxRedeemValue = subtotal - discountAmount;
                    const redeemRate = (this.loyaltySettings && this.loyaltySettings.redeemPointsPerUnit) ? this.loyaltySettings.redeemPointsPerUnit : 100;
                    const availableRedeemValue = (parseFloat(this.customerPoints) || 0) / redeemRate;
                    loyaltyRedeemedValue = Math.min(Math.max(0, maxRedeemValue), availableRedeemValue);
                }

                const total = Math.max(0, subtotal - discountAmount - loyaltyRedeemedValue);
                const multiplier = parseFloat(this.customerMultiplier) || 1.0;
                const pointsToEarn = Math.floor(total * multiplier);
                
                const subtotalDisplay = document.getElementById('posSubtotal');
                if (subtotalDisplay) subtotalDisplay.innerText = '<?= __('currency') ?> ' + (subtotal - totalVat).toFixed(3);
                
                const vatDisplay = document.getElementById('posVat');
                if (vatDisplay) vatDisplay.innerText = '<?= __('currency') ?> ' + totalVat.toFixed(2);
                
                let totalHtml = '';
                if (discountAmount > 0) totalHtml += `<div class="smaller text-danger">- Disc: <?= __('currency') ?> ${discountAmount.toFixed(3)}</div>`;
                if (loyaltyRedeemedValue > 0) totalHtml += `<div class="smaller text-success">- Loyalty: <?= __('currency') ?> ${loyaltyRedeemedValue.toFixed(3)}</div>`;
                
                const customerId = document.getElementById('posCustomer') ? document.getElementById('posCustomer').value : '';
                if (customerId) {
                    totalHtml += `<div class="smaller text-info">+ Earn: ${pointsToEarn} pts</div>`;
                }
                
                totalHtml += '<?= __('currency') ?> ' + total.toFixed(3);
                
                const totalDisplay = document.getElementById('posTotal');
                if (totalDisplay) {
                    totalDisplay.innerHTML = totalHtml;
                }
                
                const checkoutBtn = document.getElementById('checkoutBtn');
                if (checkoutBtn) checkoutBtn.disabled = false;
                this.broadcast();
            } catch (e) {
                console.error('Cart render error:', e);
            }
        },
        async checkout() {
            if (this.items.length === 0) return;
            
            const customerSelect = document.getElementById('posCustomer');
            const customerName = customerSelect.options[customerSelect.selectedIndex].text;
            document.getElementById('paymentCustomerName').innerText = customerName;
            
            const subtotal = this.items.reduce((sum, item) => sum + (item.price * item.qty), 0);
            let discountAmount = 0;
            if (this.discount) {
                discountAmount = this.discount.type === 'percentage' ? subtotal * (parseFloat(this.discount.value) / 100) : parseFloat(this.discount.value);
            }
            const redeemSwitch = document.getElementById('redeemLoyalty');
            let loyaltyRedeemedValue = (redeemSwitch && redeemSwitch.checked) ? Math.min(subtotal - discountAmount, this.customerPoints / 100) : 0;
            const total = subtotal - discountAmount - loyaltyRedeemedValue;

            this.payments = [];
            this.renderPayments();
            document.getElementById('paymentAmountDue').innerText = total.toFixed(3);
            document.getElementById('partialAmount').value = total.toFixed(3);
            
            // Sync credit customer selection if credit is default or already selected
            const creditSection = document.getElementById('creditCustomerSection');
            if (this.selectedPaymentMethod === 'credit') {
                creditSection.style.display = 'block';
                const creditSelect = $('#paymentCreditCustomer');
                creditSelect.val(customerSelect.value).trigger('change');
            } else {
                creditSection.style.display = 'none';
            }

            this.updateRemaining();

            const modal = new bootstrap.Modal(document.getElementById('posPaymentModal'));
            modal.show();
        },
        selectMethod(method, btn) {
            this.selectedPaymentMethod = method;
            document.querySelectorAll('.payment-method-btn').forEach(b => b.classList.remove('active'));
            btn.classList.add('active');
            
            const creditSection = document.getElementById('creditCustomerSection');
            if (method === 'credit') {
                creditSection.style.display = 'block';
                // Sync with main customer select
                const creditSelect = $('#paymentCreditCustomer');
                creditSelect.val(document.getElementById('posCustomer').value).trigger('change');
            } else {
                creditSection.style.display = 'none';
            }
            
            this.updateRemaining();
        },
        fillPartial(amount) {
            const input = document.getElementById('partialAmount');
            input.value = parseFloat(amount).toFixed(3);
            this.updateRemaining();
        },
        addPaymentLine() {
            const amount = parseFloat(document.getElementById('partialAmount').value) || 0;
            if (amount <= 0) return;

            this.payments.push({
                method: this.selectedPaymentMethod,
                amount: amount
            });
            this.renderPayments();
            this.updateRemaining();
            
            // Auto-fill remaining for next line if any
            const remaining = this.getRemaining();
            document.getElementById('partialAmount').value = remaining > 0 ? remaining.toFixed(3) : '0.000';
        },
        removePaymentLine(index) {
            this.payments.splice(index, 1);
            this.renderPayments();
            this.updateRemaining();
        },
        getGrandTotal() {
            const subtotal = this.items.reduce((sum, item) => sum + (item.price * item.qty), 0);
            let discountAmount = 0;
            if (this.discount) {
                discountAmount = this.discount.type === 'percentage' ? subtotal * (parseFloat(this.discount.value) / 100) : parseFloat(this.discount.value);
            }
            const redeemSwitch = document.getElementById('redeemLoyalty');
            let loyaltyRedeemedValue = (redeemSwitch && redeemSwitch.checked) ? Math.min(subtotal - discountAmount, this.customerPoints / this.loyaltySettings.redeemPointsPerUnit) : 0;
            return subtotal - discountAmount - loyaltyRedeemedValue;
        },
        getRemaining() {
            const total = this.getGrandTotal();
            const paid = this.payments.reduce((sum, p) => sum + p.amount, 0);
            return total - paid;
        },
        renderPayments() {
            const container = document.getElementById('paymentList');
            const methodLabels = {
                'cash': 'Cash',
                'card': 'Credit Card',
                'credit': 'Credit',
                'transfer': 'Bank Transfer'
            };
            container.innerHTML = this.payments.map((p, i) => `
                <div class="payment-line">
                    <div>
                        <span class="method">${methodLabels[p.method] || p.method}</span>
                        <span class="ms-2 badge bg-secondary small">${p.amount.toFixed(3)}</span>
                    </div>
                    <button class="btn btn-sm btn-outline-danger border-0" onclick="cart.removePaymentLine(${i})">
                        <i class="bi bi-trash"></i>
                    </button>
                </div>
            `).join('');
        },
        updateRemaining() {
            const remaining = this.getRemaining();
            const currentInput = parseFloat(document.getElementById('partialAmount').value) || 0;
            const display = document.getElementById('paymentRemaining');
            display.innerText = Math.max(0, remaining).toFixed(3);
            
            // Calculate potential change if the user types an amount > remaining
            const totalPaid = this.payments.reduce((sum, p) => sum + p.amount, 0);
            const grandTotal = this.getGrandTotal();
            const actualChange = Math.max(0, totalPaid - grandTotal);
            const potentialChange = Math.max(0, currentInput - remaining);
            const displayChange = Math.max(actualChange, potentialChange);
            
            const changeDisplay = document.getElementById('changeDue');
            if (changeDisplay) {
                changeDisplay.innerText = displayChange.toFixed(3);
                const cashSection = document.getElementById('cashPaymentSection');
                if (displayChange > 0 || this.selectedPaymentMethod === 'cash' || this.payments.some(p => p.method === 'cash')) {
                    cashSection.style.display = 'block';
                } else {
                    cashSection.style.display = 'none';
                }
            }
            
            if (remaining <= 0.0001 || currentInput >= remaining - 0.0001) {
                display.classList.remove('text-danger');
                display.classList.add('text-success');
                document.getElementById('confirmPaymentBtn').disabled = false;
            } else {
                display.classList.remove('text-success');
                display.classList.add('text-danger');
                document.getElementById('confirmPaymentBtn').disabled = true;
            }
        },
        async completeOrder() {
            if (this.items.length === 0) {
                Swal.fire('Error', 'Cart is empty', 'error');
                return;
            }

            // If there's an amount in the input and payments are not enough, add it
            const remainingBefore = this.getRemaining();
            const currentInput = parseFloat(document.getElementById('partialAmount').value) || 0;

            if (remainingBefore > 0.0001 && currentInput >= remainingBefore - 0.0001) {
                this.payments.push({
                    method: this.selectedPaymentMethod,
                    amount: currentInput
                });
            } else if (this.payments.length === 0) {
                const total = this.getGrandTotal();
                this.payments.push({
                    method: this.selectedPaymentMethod,
                    amount: total
                });
            }

            const remaining = this.getRemaining();
            if (remaining > 0.001) {
                Swal.fire('Error', 'Payment is incomplete', 'error');
                return;
            }

            const customerId = document.getElementById('posCustomer').value;
            if (this.payments.some(p => p.method === 'credit') && !customerId) {
                Swal.fire('Error', 'Credit payment is only allowed for registered customers', 'error');
                return;
            }

            const btn = document.getElementById('confirmPaymentBtn');
            const originalText = btn.innerText;
            btn.disabled = true;
            btn.innerText = 'PROCESSING...';
            
            const subtotal = this.items.reduce((sum, item) => sum + (parseFloat(item.price) * item.qty), 0);
            const totalVat = this.items.reduce((sum, item) => {
                const vatRate = (item.vatRate !== undefined && item.vatRate !== null) ? item.vatRate : 0;
                return sum + ((parseFloat(item.price) * item.qty) * (vatRate / (100 + vatRate)));
            }, 0);
            let discountAmount = 0;
            if (this.discount) {
                discountAmount = this.discount.type === 'percentage' ? subtotal * (parseFloat(this.discount.value) / 100) : parseFloat(this.discount.value);
            }
            const redeemSwitch = document.getElementById('redeemLoyalty');
            let loyaltyRedeemed = (redeemSwitch && redeemSwitch.checked) ? Math.min(subtotal - discountAmount, this.customerPoints / this.loyaltySettings.redeemPointsPerUnit) : 0;

            const formData = new FormData();
            formData.append('action', 'save_pos_transaction');
            formData.append('customer_id', customerId);
            formData.append('payments', JSON.stringify(this.payments));
            formData.append('total_amount', subtotal);
            formData.append('tax_amount', totalVat);
            formData.append('discount_code_id', this.discount ? this.discount.id : '');
            formData.append('discount_amount', discountAmount);
            formData.append('loyalty_redeemed', loyaltyRedeemed);
            formData.append('items', JSON.stringify(this.items.map(i => {
                const vr = (i.vatRate !== undefined && i.vatRate !== null) ? i.vatRate : 0;
                const va = (parseFloat(i.price) * i.qty) * (vr / (100 + vr));
                return {id: i.id, qty: i.qty, price: i.price, vat_rate: vr, vat_amount: va};
            })));
            
            try {
                const resp = await fetch('index.php', { method: 'POST', body: formData });
                const text = await resp.text();
                let result;
                try {
                    result = JSON.parse(text);
                } catch (e) {
                    console.error('Invalid JSON response:', text);
                    throw new Error('Server returned an invalid response');
                }

                if (result.success) {
                    const payModal = bootstrap.Modal.getInstance(document.getElementById('posPaymentModal'));
                    if (payModal) payModal.hide();
                    this.showReceipt(result.invoice_id, discountAmount, loyaltyRedeemed, result.transaction_no);
                } else {
                    Swal.fire('Error', result.error, 'error');
                    btn.disabled = false;
                    btn.innerText = originalText;
                }
            } catch (err) {
                console.error(err);
                Swal.fire('Error', err.message || 'Something went wrong', 'error');
                btn.disabled = false;
                btn.innerText = originalText;
            }
        },
        showReceipt(invId, discountAmount, loyaltyRedeemed, transactionNo) {
            const container = document.getElementById('posReceiptContent');
            const customerSelect = document.getElementById('posCustomer');
            const customerName = (customerSelect && customerSelect.selectedIndex >= 0 && customerSelect.value !== '') ? customerSelect.options[customerSelect.selectedIndex].text : '<?= $translations['ar']['walk_in_customer'] ?> / <?= $translations['en']['walk_in_customer'] ?>';
            const paymentsHtml = this.payments.map(p => {
                let m = p.method.toLowerCase();
                let methodAr = m === 'cash' ? 'نقد' : (m === 'card' ? 'بطاقة ائتمان' : (m === 'credit' ? 'آجل' : (m === 'transfer' ? 'تحويل بنكي' : m)));
                let methodEn = m === 'cash' ? 'Cash' : (m === 'card' ? 'Credit Card' : (m === 'credit' ? 'Credit' : (m === 'transfer' ? 'Bank Transfer' : m.charAt(0).toUpperCase() + m.slice(1))));
                return `
                <div class="d-flex justify-content-between small">
                    <span class="text-uppercase">${methodAr} / ${methodEn}</span>
                    <span><?= __('currency') ?> ${p.amount.toFixed(3)}</span>
                </div>
                `;
            }).join('');
            const date = new Date().toLocaleString();
            
            let itemsHtml = this.items.map(item => {
                const itemTotal = item.price * item.qty;
                const vatRate = (item.vatRate !== undefined && item.vatRate !== null) ? item.vatRate : 0; // Default to 5 if not set
                const vatAmount = itemTotal * (vatRate / (100 + vatRate));
                const exclVat = itemTotal - vatAmount;
                return `
                <tr>
                    <td>
                        <div class="fw-bold">${item.nameAr || ''}</div>
                        <div>${item.nameEn}</div>
                        <small>${item.qty} x ${parseFloat(item.price).toFixed(3)}</small>
                    </td>
                    <td style="text-align: right; vertical-align: bottom;">${vatAmount.toFixed(2)}</td>
                    <td style="text-align: right; vertical-align: bottom;">${itemTotal.toFixed(3)}</td>
                </tr>
                `;
            }).join('');
            
            const subtotal = this.items.reduce((sum, item) => sum + (item.price * item.qty), 0);
            const totalVat = this.items.reduce((sum, item) => {
                const vatRate = (item.vatRate !== undefined && item.vatRate !== null) ? item.vatRate : 0;
                return sum + ((item.price * item.qty) * (vatRate / (100 + vatRate)));
            }, 0);
            const total = subtotal - discountAmount - loyaltyRedeemed;
            const companyName = "<?= htmlspecialchars($data['settings']['company_name'] ?? 'Accounting System') ?>";
            const outletName = "<?= htmlspecialchars($data['settings']['current_outlet_name'] ?? '') ?>";
            const companyPhone = "<?= htmlspecialchars($data['settings']['company_phone'] ?? '') ?>";
            const companyVat = "<?= htmlspecialchars($data['settings']['vat_number'] ?? '') ?>";
            const companyLogo = "<?= htmlspecialchars($data['settings']['company_logo'] ?? '') ?>";

            container.innerHTML = `
                <div class="thermal-receipt <?= $lang === 'ar' ? 'rtl' : '' ?>">
                    <div class="center">
                        ${companyLogo ? `<img src="${companyLogo}" alt="Logo" style="max-height: 60px; width: auto; margin-bottom: 10px; display: block; margin-left: auto; margin-right: auto;">` : ''}
                        <h5 class="mb-0 fw-bold">${companyName}</h5>
                        ${outletName ? `<div class="fw-bold text-uppercase">${outletName}</div>` : ''}
                        ${companyPhone ? `<div>هاتف / Tel: ${companyPhone}</div>` : ''}
                        ${companyVat ? `<div>الرقم الضريبي / VAT No: ${companyVat}</div>` : ''}
                        <div class="separator"></div>
                        <h6 class="fw-bold text-uppercase">فاتورة ضريبية / TAX INVOICE</h6>
                        <div>رقم الفاتورة / Invoice No: ${transactionNo || 'POS-'+invId}</div>
                        <div>التاريخ / Date: ${date}</div>
                        <div class="separator"></div>
                    </div>
                    <div>
                        <strong>العميل / Customer:</strong> ${customerName}
                    </div>
                    <div class="mt-1">
                        <strong>المدفوعات / Payments:</strong>
                        ${paymentsHtml}
                    </div>
                    <div class="separator"></div>
                    <table class="table-borderless">
                        <thead>
                            <tr>
                                <th>البند / Item</th>
                                <th style="text-align: right;">ضريبة / VAT</th>
                                <th style="text-align: right;">الإجمالي / Total</th>
                            </tr>
                        </thead>
                        <tbody>
                            ${itemsHtml}
                        </tbody>
                    </table>
                    <div class="separator"></div>
                    <div class="d-flex justify-content-between">
                        <span>المجموع الفرعي (غير شامل الضريبة) / Subtotal (Excl. VAT)</span>
                        <span><?= __('currency') ?> ${(subtotal - totalVat).toFixed(3)}</span>
                    </div>
                    <div class="d-flex justify-content-between">
                        <span>الضريبة / VAT</span>
                        <span><?= __('currency') ?> ${totalVat.toFixed(2)}</span>
                    </div>
                    <div class="d-flex justify-content-between fw-bold">
                        <span>المجموع شامل الضريبة / Total (Incl. VAT)</span>
                        <span><?= __('currency') ?> ${subtotal.toFixed(3)}</span>
                    </div>
                    ${discountAmount > 0 ? `<div class="d-flex justify-content-between text-danger"><span>خصم / Discount</span><span>- <?= __('currency') ?> ${parseFloat(discountAmount).toFixed(3)}</span></div>` : ''}
                    ${loyaltyRedeemed > 0 ? `<div class="d-flex justify-content-between text-success"><span>الولاء / Loyalty</span><span>- <?= __('currency') ?> ${parseFloat(loyaltyRedeemed).toFixed(3)}</span></div>` : ''}
                    <div class="separator"></div>
                    <div class="d-flex justify-content-between total-row">
                        <span>الإجمالي / Total</span>
                        <span><?= __('currency') ?> ${total.toFixed(3)}</span>
                    </div>
                    <div class="separator"></div>
                    <div class="center small">
                        شكراً لتعاملكم معنا! / Thank you for your business!<br>
                        يرجى الاحتفاظ بالإيصال. / Please keep the receipt.
                    </div>
                </div>
            `;
            
            const modal = new bootstrap.Modal(document.getElementById('posReceiptModal'));
            modal.show();
            
            this.clear();
            
            document.getElementById('posReceiptModal').addEventListener('hidden.bs.modal', function () {
                location.reload();
            }, { once: true });
        },

        async syncCustomer(val) {
            document.getElementById('posCustomer').value = val;
            const customerSelect = document.getElementById('posCustomer');
            const customerName = customerSelect.options[customerSelect.selectedIndex].text;
            document.getElementById('paymentCustomerName').innerText = customerName;
            await this.onCustomerChange();
        }
    };

    
    // Event Delegation for clicking on cards
    document.getElementById('productGrid').addEventListener('click', (e) => {
        const card = e.target.closest('.product-card');
        if (card) {
            addToCartFromCard(card);
        }
    });

    function addToCartFromCard(card) {
        const product = {
            id: parseInt(card.dataset.id),
            nameEn: card.dataset.nameEn,
            nameAr: card.dataset.nameAr,
            price: parseFloat(card.dataset.price),
            sku: card.dataset.sku,
            stock_quantity: parseFloat(card.dataset.stockQuantity),
            vatRate: parseFloat(card.dataset.vatRate) || 0
        };
        cart.add(product);
    }

    let searchTimeout;
    document.getElementById('productSearch').addEventListener('input', (e) => {
        const q = e.target.value.trim();
        clearTimeout(searchTimeout);
        
        searchTimeout = setTimeout(() => {
            const grid = document.getElementById('productGrid');
            grid.style.opacity = '0.5';
            
            fetch('index.php?action=pos_search_items&q=' + encodeURIComponent(q))
                .then(response => response.text())
                .then(html => {
                    grid.innerHTML = html;
                    grid.style.opacity = '1';
                })
                .catch(err => {
                    console.error(err);
                    grid.style.opacity = '1';
                });
        }, 300);
    });

    document.getElementById('barcodeInput').addEventListener('keypress', (e) => {
        if (e.key === 'Enter') {
            const barcode = e.target.value.trim();
            if (!barcode) return;
            
            // Try finding in DOM first (current view)
            const card = Array.from(document.querySelectorAll('.product-card')).find(c => c.dataset.sku === barcode);
            
            if (card) {
                addToCartFromCard(card);
                e.target.value = '';
            } else {
                // Not found in current view, check server
                fetch('index.php?action=pos_get_item_by_sku&sku=' + encodeURIComponent(barcode))
                    .then(response => response.json())
                    .then(product => {
                        if (product && product.error) {
                            Swal.fire({
                                toast: true, position: 'top-end', icon: 'error',
                                title: product.error, showConfirmButton: false, timer: 1800
                            });
                            e.target.select();
                            return;
                        }

                        if (product) {
                            cart.add(product);
                            e.target.value = '';
                            Swal.fire({
                                toast: true, position: 'top-end', icon: 'success',
                                title: (document.documentElement.lang === 'ar' ? 'تم إضافة: ' : 'Added: ') + (document.documentElement.lang === 'ar' ? (product.nameAr || product.nameEn) : (product.nameEn || product.nameAr)),
                                showConfirmButton: false, timer: 1000
                            });
                        } else {
                            Swal.fire({
                                toast: true, position: 'top-end', icon: 'error',
                                title: 'Product not found', showConfirmButton: false, timer: 1500
                            });
                            e.target.select();
                        }
                    });
            }
        }
    });


    // Keep barcode input focused
    document.addEventListener('click', () => {
        if (document.activeElement.tagName !== 'INPUT' && document.activeElement.tagName !== 'SELECT' && document.activeElement.tagName !== 'TEXTAREA') {
            const bc = document.getElementById('barcodeInput');
            if (bc) bc.focus();
        }
    });

    $(document).ready(function() {
        $('#posCustomer').select2({
            width: '100%',
            placeholder: 'Select Customer'
        });
        $('#paymentCreditCustomer').select2({
            width: '100%',
            placeholder: 'Select Customer',
            dropdownParent: $('#posPaymentModal')
        });

        // Initial broadcast to sync customer display (theme & empty state)
        if (typeof cart !== 'undefined' && cart.broadcast) {
            cart.broadcast();
        }
    });
    </script>

    <?php if (!$active_session): ?>
    <!-- Open Register Modal -->
    <div class="modal fade" id="openRegisterModal" data-bs-backdrop="static" data-bs-keyboard="false" tabindex="-1">
        <div class="modal-dialog modal-dialog-centered">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title">Open Cash Register</h5>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <input type="hidden" name="open_register" value="1">
                        <div class="mb-3">
                            <label class="form-label">Select Register</label>
                            <select name="register_id" class="form-select" required>
                                <?php if (isset($registers)): foreach ($registers as $r): ?>
                                    <option value="<?= $r['id'] ?>"><?= htmlspecialchars($r['name']) ?></option>
                                <?php endforeach; endif; ?>
                            </select>
                        </div>
                        <div class="mb-3">
                            <label class="form-label">Opening Balance</label>
                            <div class="input-group">
                                <span class="input-group-text">OMR</span>
                                <input type="number" step="0.001" name="opening_balance" class="form-control" required placeholder="0.000">
                            </div>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <a href="index.php?page=dashboard" class="btn btn-secondary">Cancel & Go to Dashboard</a>
                        <button type="submit" class="btn btn-primary">Open Session</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
    <?php endif; ?>

    <?php if ($active_session): ?>
    <!-- Close Register Modal -->
    <div class="modal fade" id="closeRegisterModal" tabindex="-1">
        <div class="modal-dialog modal-dialog-centered">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title">Close Cash Register</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <input type="hidden" name="close_register" value="1">
                        <input type="hidden" name="redirect_to" value="dashboard">
                        <input type="hidden" name="session_id" value="<?= $_SESSION['register_session_id'] ?? '' ?>">
                        <div class="mb-3">
                            <label class="form-label">Cash in Hand (Counted)</label>
                            <div class="input-group">
                                <span class="input-group-text">OMR</span>
                                <input type="number" step="0.001" name="cash_in_hand" class="form-control" required placeholder="0.000">
                            </div>
                        </div>
                        <div class="mb-3">
                            <label class="form-label">Notes</label>
                            <textarea name="notes" class="form-control" rows="3" placeholder="Any discrepancies or notes..."></textarea>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-secondary" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" class="btn btn-danger">Close Session</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
    <?php endif; ?>

    <script>
    document.addEventListener('DOMContentLoaded', function() {
        <?php if (!$active_session): ?>
        var openModal = new bootstrap.Modal(document.getElementById('openRegisterModal'));
        openModal.show();
        <?php endif; ?>
    });
    </script>

    <?php elseif ($page === 'quotations'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="Quotations" data-ar="عروض الأسعار">Quotations</h5>
            <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addQuotationModal">
                <i class="bi bi-plus-lg"></i> <span data-en="Create New Quotation" data-ar="إنشاء عرض سعر جديد">Create New Quotation</span>
            </button>
        </div>

        <!-- Filters Section -->
        <div class="bg-light p-3 rounded mb-4">
            <form method="GET" class="form-grid-3">
                <input type="hidden" name="page" value="quotations">
                <div class="col-md-3">
                    <label class="form-label small fw-bold" data-en="Search" data-ar="بحث">Search</label>
                    <input type="text" name="search" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['search'] ?? '') ?>" placeholder="Quot # or Name...">
                </div>
                <div class="col-md-3">
                    <label class="form-label small fw-bold" data-en="Customer" data-ar="العميل">Customer</label>
                    <select name="customer_id" class="form-select form-select-sm">
                        <option value="" data-en="All" data-ar="الكل">All</option>
                        <?php foreach ($data['customers_list'] as $c): ?>
                        <option value="<?= $c['id'] ?>" <?= (($_GET['customer_id'] ?? '') == $c['id']) ? 'selected' : '' ?>><?= htmlspecialchars($c['name']) ?></option>
                        <?php endforeach; ?>
                    </select>
                </div>
                <div class="col-md-2">
                    <label class="form-label small fw-bold" data-en="Start Date" data-ar="من تاريخ">Start Date</label>
                    <input type="date" name="start_date" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['start_date'] ?? '') ?>">
                </div>
                <div class="col-md-2">
                    <label class="form-label small fw-bold" data-en="End Date" data-ar="إلى تاريخ">End Date</label>
                    <input type="date" name="end_date" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['end_date'] ?? '') ?>">
                </div>
                <div class="col-md-2 d-flex align-items-end gap-1">
                    <button type="submit" class="btn btn-primary btn-sm flex-grow-1">
                        <i class="bi bi-filter"></i> <span data-en="Filter" data-ar="تصفية">Filter</span>
                    </button>
                    <div class="dropdown d-inline-block">
                        <button class="btn btn-outline-success btn-sm dropdown-toggle" type="button" data-bs-toggle="dropdown">
                            <i class="bi bi-download"></i> <span data-en="Export" data-ar="تصدير">Export</span>
                        </button>
                        <ul class="dropdown-menu">
                            <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => 'quotations', 'format' => 'csv'])) ?>"><i class="bi bi-filetype-csv me-2"></i> CSV</a></li>
                            <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => 'quotations', 'format' => 'excel'])) ?>"><i class="bi bi-file-earmark-excel me-2"></i> Excel</a></li>
                        </ul>
                    </div>
                    <a href="index.php?page=quotations" class="btn btn-outline-secondary btn-sm flex-grow-1">
                        <i class="bi bi-x-circle"></i> <span data-en="Clear" data-ar="مسح">Clear</span>
                    </a>
                </div>
            
                <div class="col-md-auto ms-auto d-flex align-items-end mt-2 mt-md-0">
                    <div class="input-group input-group-sm w-auto">
                        <span class="input-group-text" data-en="Limit" data-ar="الحد">Limit</span>
                        <select name="limit" class="form-select" onchange="this.form.submit()">
                            <option value="20" <?= (($_GET['limit'] ?? 20) == 20) ? 'selected' : '' ?>>20</option>
                            <option value="40" <?= (($_GET['limit'] ?? 20) == 40) ? 'selected' : '' ?>>40</option>
                            <option value="60" <?= (($_GET['limit'] ?? 20) == 60) ? 'selected' : '' ?>>60</option>
                            <option value="100" <?= (($_GET['limit'] ?? 20) == 100) ? 'selected' : '' ?>>100</option>
                        </select>
                    </div>
                </div>
            </form>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="Quotation #" data-ar="رقم العرض">Quotation #</th>
                        <th data-en="Date" data-ar="التاريخ">Date</th>
                        <th data-en="Valid Until" data-ar="صالح حتى">Valid Until</th>
                        <th data-en="Customer" data-ar="العميل">Customer</th>
                        <th data-en="Status" data-ar="الحالة">Status</th>
                        <th data-en="Total" data-ar="الإجمالي" class="text-end">Total</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php 
                    foreach ($data['quotations'] as $q): 
                        $items = db()->prepare("SELECT qi.*, i.name_en, i.name_ar, i.vat_rate 
                                                FROM quotation_items qi 
                                                JOIN stock_items i ON qi.item_id = i.id 
                                                WHERE qi.quotation_id = ?");
                        $items->execute([$q['id']]);
                        $q['items'] = $items->fetchAll(PDO::FETCH_ASSOC);
                    ?>
                    <tr>
                        <td>QUO-<?= str_pad((string)$q['id'], 5, '0', STR_PAD_LEFT) ?></td>
                        <td><?= $q['quotation_date'] ?></td>
                        <td><?= $q['valid_until'] ?: '---' ?></td>
                        <td><?= htmlspecialchars($q['customer_name'] ?? '---') ?></td>
                        <td>
                            <?php 
                                $statusClass = 'bg-secondary';
                                if ($q['status'] === 'converted') $statusClass = 'bg-success';
                                elseif ($q['status'] === 'pending') $statusClass = 'bg-warning text-dark';
                                elseif ($q['status'] === 'expired' || $q['status'] === 'cancelled') $statusClass = 'bg-danger';
                            ?>
                            <span class="badge text-uppercase <?= $statusClass ?>"><?= htmlspecialchars($q['status']) ?></span>
                        </td>
                        <td class="text-end fw-bold">OMR <?= number_format((float)$q['total_with_vat'], 3) ?></td>
                        <td class="text-end">
                            <div class="btn-group btn-group-sm">
                                <button class="btn btn-outline-info view-quotation-btn" data-json="<?= htmlspecialchars(json_encode($q)) ?>" title="View"><i class="bi bi-eye"></i></button>
                                <button class="btn btn-outline-secondary" onclick="window.viewAndPrintQuotation(<?= htmlspecialchars(json_encode($q)) ?>)" title="Print"><i class="bi bi-printer"></i></button>
                                <button class="btn btn-outline-primary edit-quotation-btn" data-json="<?= htmlspecialchars(json_encode($q)) ?>" data-bs-toggle="modal" data-bs-target="#editQuotationModal" title="Edit"><i class="bi bi-pencil-square"></i></button>
                                <?php if ($q['status'] === 'pending'): ?>
                                <button class="btn btn-outline-success convert-quotation-btn" data-id="<?= $q['id'] ?>" title="Convert to Invoice"><i class="bi bi-receipt"></i></button>
                                <?php endif; ?>
                                <button class="btn btn-outline-danger" onclick="if(confirm('Delete this quotation?')) { const f = document.createElement('form'); f.method='POST'; f.innerHTML='<input type=hidden name=delete_quotation><input type=hidden name=id value=<?= $q['id'] ?>>'; document.body.appendChild(f); f.submit(); }" title="Delete"><i class="bi bi-trash"></i></button>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                    <?php if (empty($data['quotations'])): ?>
                    <tr><td colspan="7" class="text-center py-4 text-muted" data-en="No quotations found" data-ar="لا توجد عروض أسعار">No quotations found</td></tr>
                    <?php endif; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <?php elseif ($page === 'lpos'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="Local Purchase Orders (LPO)" data-ar="أوامر الشراء المحلية (LPO)">Local Purchase Orders (LPO)</h5>
            <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addLpoModal">
                <i class="bi bi-plus-lg"></i> <span data-en="Create New LPO" data-ar="إنشاء أمر شراء جديد">Create New LPO</span>
            </button>
        </div>

        <!-- Filters Section -->
        <div class="bg-light p-3 rounded mb-4">
            <form method="GET" class="form-grid-3">
                <input type="hidden" name="page" value="lpos">
                <div class="col-md-3">
                    <label class="form-label small fw-bold" data-en="Search" data-ar="بحث">Search</label>
                    <input type="text" name="search" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['search'] ?? '') ?>" placeholder="LPO # or Name...">
                </div>
                <div class="col-md-3">
                    <label class="form-label small fw-bold" data-en="Supplier" data-ar="المورد">Supplier</label>
                    <select name="supplier_id" class="form-select form-select-sm">
                        <option value="" data-en="All" data-ar="الكل">All</option>
                        <?php foreach ($data['suppliers'] as $s): ?>
                        <option value="<?= $s['id'] ?>" <?= (($_GET['supplier_id'] ?? '') == $s['id']) ? 'selected' : '' ?>><?= htmlspecialchars($s['name']) ?></option>
                        <?php endforeach; ?>
                    </select>
                </div>
                <div class="col-md-2">
                    <label class="form-label small fw-bold" data-en="Start Date" data-ar="من تاريخ">Start Date</label>
                    <input type="date" name="start_date" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['start_date'] ?? '') ?>">
                </div>
                <div class="col-md-2">
                    <label class="form-label small fw-bold" data-en="End Date" data-ar="إلى تاريخ">End Date</label>
                    <input type="date" name="end_date" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['end_date'] ?? '') ?>">
                </div>
                <div class="col-md-2 d-flex align-items-end gap-1">
                    <button type="submit" class="btn btn-primary btn-sm flex-grow-1">
                        <i class="bi bi-filter"></i> <span data-en="Filter" data-ar="تصفية">Filter</span>
                    </button>
                    <div class="dropdown d-inline-block">
                        <button class="btn btn-outline-success btn-sm dropdown-toggle" type="button" data-bs-toggle="dropdown">
                            <i class="bi bi-download"></i> <span data-en="Export" data-ar="تصدير">Export</span>
                        </button>
                        <ul class="dropdown-menu">
                            <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => 'lpos', 'format' => 'csv'])) ?>"><i class="bi bi-filetype-csv me-2"></i> CSV</a></li>
                            <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => 'lpos', 'format' => 'excel'])) ?>"><i class="bi bi-file-earmark-excel me-2"></i> Excel</a></li>
                        </ul>
                    </div>
                    <a href="index.php?page=lpos" class="btn btn-outline-secondary btn-sm flex-grow-1">
                        <i class="bi bi-x-circle"></i> <span data-en="Clear" data-ar="مسح">Clear</span>
                    </a>
                </div>
            
                <div class="col-md-auto ms-auto d-flex align-items-end mt-2 mt-md-0">
                    <div class="input-group input-group-sm w-auto">
                        <span class="input-group-text" data-en="Limit" data-ar="الحد">Limit</span>
                        <select name="limit" class="form-select" onchange="this.form.submit()">
                            <option value="20" <?= (($_GET['limit'] ?? 20) == 20) ? 'selected' : '' ?>>20</option>
                            <option value="40" <?= (($_GET['limit'] ?? 20) == 40) ? 'selected' : '' ?>>40</option>
                            <option value="60" <?= (($_GET['limit'] ?? 20) == 60) ? 'selected' : '' ?>>60</option>
                            <option value="100" <?= (($_GET['limit'] ?? 20) == 100) ? 'selected' : '' ?>>100</option>
                        </select>
                    </div>
                </div>
            </form>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="LPO #" data-ar="رقم الأمر">LPO #</th>
                        <th data-en="Date" data-ar="التاريخ">Date</th>
                        <th data-en="Delivery Date" data-ar="تاريخ التسليم">Delivery Date</th>
                        <th data-en="Supplier" data-ar="المورد">Supplier</th>
                        <th data-en="Status" data-ar="الحالة">Status</th>
                        <th data-en="Total" data-ar="الإجمالي" class="text-end">Total</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php 
                    foreach ($data['lpos'] as $q): 
                        $items = db()->prepare("SELECT li.*, i.name_en, i.name_ar, i.vat_rate 
                                                FROM lpo_items li 
                                                JOIN stock_items i ON li.item_id = i.id 
                                                WHERE li.lpo_id = ?");
                        $items->execute([$q['id']]);
                        $q['items'] = $items->fetchAll(PDO::FETCH_ASSOC);
                    ?>
                    <tr>
                        <td>LPO-<?= str_pad((string)$q['id'], 5, '0', STR_PAD_LEFT) ?></td>
                        <td><?= $q['lpo_date'] ?></td>
                        <td><?= $q['delivery_date'] ?: '---' ?></td>
                        <td><?= htmlspecialchars($q['supplier_name'] ?? '---') ?></td>
                        <td>
                            <?php 
                                $statusClass = 'bg-secondary';
                                if ($q['status'] === 'converted') $statusClass = 'bg-success';
                                elseif ($q['status'] === 'pending') $statusClass = 'bg-warning text-dark';
                                elseif ($q['status'] === 'cancelled') $statusClass = 'bg-danger';
                            ?>
                            <span class="badge text-uppercase <?= $statusClass ?>"><?= htmlspecialchars($q['status']) ?></span>
                        </td>
                        <td class="text-end fw-bold">OMR <?= number_format((float)$q['total_with_vat'], 3) ?></td>
                        <td class="text-end">
                            <div class="btn-group btn-group-sm">
                                <button class="btn btn-outline-info view-lpo-btn" data-json="<?= htmlspecialchars(json_encode($q)) ?>" title="View"><i class="bi bi-eye"></i></button>
                                <?php if ($q['status'] !== 'converted'): ?>
                                <button class="btn btn-outline-success" onclick="if(confirm('Convert this LPO to Purchase Invoice?')) { const f = document.createElement('form'); f.method='POST'; f.innerHTML='<input type=hidden name=convert_lpo_to_purchase><input type=hidden name=lpo_id value=<?= $q['id'] ?>>'; document.body.appendChild(f); f.submit(); }" title="Convert to Purchase"><i class="bi bi-arrow-repeat"></i></button>
                                <button class="btn btn-outline-primary edit-lpo-btn" data-json="<?= htmlspecialchars(json_encode($q)) ?>" data-bs-toggle="modal" data-bs-target="#editLpoModal" title="Edit"><i class="bi bi-pencil-square"></i></button>
                                <?php endif; ?>
                                <button class="btn btn-outline-danger" onclick="if(confirm('Delete this LPO?')) { const f = document.createElement('form'); f.method='POST'; f.innerHTML='<input type=hidden name=delete_lpo><input type=hidden name=id value=<?= $q['id'] ?>>'; document.body.appendChild(f); f.submit(); }" title="Delete"><i class="bi bi-trash"></i></button>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                    <?php if (empty($data['lpos'])): ?>
                    <tr><td colspan="7" class="text-center py-4 text-muted" data-en="No LPOs found" data-ar="لا توجد أوامر شراء">No LPOs found</td></tr>
                    <?php endif; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        

    </div>

    <?php elseif ($page === 'sales' || $page === 'purchases'): ?>
    <div class="card p-4">
        <!-- Print Header -->
        <div class="print-only mb-4">
            <div class="row align-items-center">
                <div class="col-6">
                    <?php if (!empty($data['settings']['company_logo'])): ?>
                        <img src="<?= htmlspecialchars($data['settings']['company_logo']) ?>" alt="Logo" style="max-height: 80px;" class="mb-2">
                    <?php endif; ?>
                    <h3 class="mb-1 fw-bold"><?= htmlspecialchars($data['settings']['company_name'] ?? 'Accounting System') ?></h3>
                    <p class="text-muted small mb-0"><?= nl2br(htmlspecialchars($data['settings']['company_address'] ?? '')) ?></p>
                    <p class="text-muted small mb-0">VAT: <?= htmlspecialchars($data['settings']['vat_number'] ?? '') ?></p>
                </div>
                <div class="col-6 text-end">
                    <h2 class="text-uppercase text-muted"><?= $currTitle['en'] ?> Report</h2>
                    <p class="mb-0">Date: <?= date('Y-m-d') ?></p>
                    <?php if (!empty($_GET['start_date']) || !empty($_GET['end_date']) || !empty($_GET['customer_id'])): ?>
                        <p class="small text-muted mb-0">
                            <?php if (!empty($_GET['customer_id'])): ?>
                                <strong><?= $page === 'sales' ? 'Customer' : 'Supplier' ?>:</strong> 
                                <?php 
                                    foreach ($data['customers_list'] as $c) {
                                        if ($c['id'] == $_GET['customer_id']) {
                                            echo htmlspecialchars($c['name']);
                                            break;
                                        }
                                    }
                                ?> | 
                            <?php endif; ?>
                            <strong>Period:</strong> <?= !empty($_GET['start_date']) ? $_GET['start_date'] : 'All' ?> to <?= !empty($_GET['end_date']) ? $_GET['end_date'] : 'All' ?>
                        </p>
                    <?php endif; ?>
                </div>
            </div>
            <hr>
        </div>

        <div class="d-flex justify-content-between align-items-center mb-4 d-print-none">
            <h5 class="m-0" data-en="<?= $currTitle['en'] ?>" data-ar="<?= $currTitle['ar'] ?>"><?= $currTitle['en'] ?></h5>
            <div class="d-flex gap-2">
                <a href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => $page, 'format' => 'excel'])) ?>" class="btn btn-outline-success">
                    <i class="bi bi-file-earmark-excel"></i> <span data-en="Export to Excel" data-ar="تصدير إلى اكسل">Export to Excel</span>
                </a>
                <?php if (can($page . '_add')): ?>
                <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addInvoiceModal">
                    <i class="bi bi-plus-lg"></i> <span data-en="Create New Tax Invoice" data-ar="إنشاء فاتورة ضريبية جديدة">Create New Tax Invoice</span>
                </button>
                <?php endif; ?>
            </div>
        </div>

        <!-- Filters Section -->
        <div class="bg-light p-3 rounded mb-4 d-print-none">
            <form method="GET" class="form-grid-3">
                <input type="hidden" name="page" value="<?= $page ?>">
                <div class="col-md-3">
                    <label class="form-label small fw-bold" data-en="Search" data-ar="بحث">Search</label>
                    <input type="text" name="search" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['search'] ?? '') ?>" placeholder="Inv # or Name...">
                </div>
                <div class="col-md-3">
                    <label class="form-label small fw-bold" data-en="<?= $page === 'sales' ? 'Customer' : 'Supplier' ?>" data-ar="<?= $page === 'sales' ? 'العميل' : 'المورد' ?>"><?= $page === 'sales' ? 'Customer' : 'Supplier' ?></label>
                    <select name="customer_id" class="form-select form-select-sm">
                        <option value="" data-en="All" data-ar="الكل">All</option>
                        <?php foreach ($data['customers_list'] as $c): ?>
                        <option value="<?= $c['id'] ?>" <?= (($_GET['customer_id'] ?? '') == $c['id']) ? 'selected' : '' ?>><?= htmlspecialchars($c['name']) ?></option>
                        <?php endforeach; ?>
                    </select>
                </div>
                <div class="col-md-2">
                    <label class="form-label small fw-bold" data-en="Start Date" data-ar="من تاريخ">Start Date</label>
                    <input type="date" name="start_date" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['start_date'] ?? '') ?>">
                </div>
                <div class="col-md-2">
                    <label class="form-label small fw-bold" data-en="End Date" data-ar="إلى تاريخ">End Date</label>
                    <input type="date" name="end_date" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['end_date'] ?? '') ?>">
                </div>
                <div class="col-md-2 d-flex align-items-end gap-1">
                    <button type="submit" class="btn btn-primary btn-sm flex-grow-1">
                        <i class="bi bi-filter"></i> <span data-en="Filter" data-ar="تصفية">Filter</span>
                    </button>
                    <div class="dropdown d-inline-block">
                        <button class="btn btn-success btn-sm dropdown-toggle" type="button" data-bs-toggle="dropdown">
                            <i class="bi bi-download"></i> <span data-en="Export" data-ar="تصدير">Export</span>
                        </button>
                        <ul class="dropdown-menu">
                            <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => $page, 'format' => 'csv'])) ?>"><i class="bi bi-filetype-csv me-2"></i> CSV</a></li>
                            <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => $page, 'format' => 'excel'])) ?>"><i class="bi bi-file-earmark-excel me-2"></i> Excel</a></li>
                        </ul>
                    </div>
                    <button type="button" class="btn btn-outline-primary btn-sm" onclick="window.print()">
                        <i class="bi bi-printer"></i> <span data-en="Print" data-ar="طباعة">Print</span>
                    </button>
                    <a href="index.php?page=<?= $page ?>" class="btn btn-outline-secondary btn-sm flex-grow-1">
                        <i class="bi bi-x-circle"></i> <span data-en="Clear" data-ar="مسح">Clear</span>
                    </a>
                </div>
            
                <div class="col-md-auto ms-auto d-flex align-items-end mt-2 mt-md-0">
                    <div class="input-group input-group-sm w-auto">
                        <span class="input-group-text" data-en="Limit" data-ar="الحد">Limit</span>
                        <select name="limit" class="form-select" onchange="this.form.submit()">
                            <option value="20" <?= (($_GET['limit'] ?? 20) == 20) ? 'selected' : '' ?>>20</option>
                            <option value="40" <?= (($_GET['limit'] ?? 20) == 40) ? 'selected' : '' ?>>40</option>
                            <option value="60" <?= (($_GET['limit'] ?? 20) == 60) ? 'selected' : '' ?>>60</option>
                            <option value="100" <?= (($_GET['limit'] ?? 20) == 100) ? 'selected' : '' ?>>100</option>
                        </select>
                    </div>
                </div>
            </form>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="Invoice #" data-ar="رقم الفاتورة">Invoice #</th>
                        <th data-en="Date" data-ar="التاريخ">Date</th>
                        <th data-en="Due Date" data-ar="تاريخ الاستحقاق">Due Date</th>
                        <th data-en="<?= $page === 'sales' ? 'Customer' : 'Supplier' ?>" data-ar="<?= $page === 'sales' ? 'العميل' : 'المورد' ?>"><?= $page === 'sales' ? 'Customer' : 'Supplier' ?></th>
                        <th data-en="Status" data-ar="الحالة">Status</th>
                        <th data-en="Total" data-ar="الإجمالي" class="text-end">Total</th>
                        <th data-en="Paid" data-ar="المدفوع" class="text-end">Paid</th>
                        <th data-en="Balance" data-ar="المتبقي" class="text-end">Balance</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end d-print-none">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php 
                    $itemTable = ($page === 'purchases') ? 'purchase_items' : 'invoice_items';
                    $fkCol = ($page === 'purchases') ? 'purchase_id' : 'invoice_id';
                    $total_all = 0; $total_paid = 0; $total_balance = 0;
                    foreach ($data['invoices'] as $inv): 
                        $total_all += (float)$inv['total_with_vat'];
                        $total_paid += (float)$inv['paid_amount'];
                        $total_balance += ((float)$inv['total_with_vat'] - (float)$inv['paid_amount']);
                        $items = db()->prepare("SELECT ii.*, i.name_en, i.name_ar, i.vat_rate 
                                                FROM $itemTable ii 
                                                JOIN stock_items i ON ii.item_id = i.id 
                                                WHERE ii.$fkCol = ?");
                        $items->execute([$inv['id']]);
                        $inv['items'] = $items->fetchAll(PDO::FETCH_ASSOC);
                        $prefix = ($page === 'purchases') ? 'PUR' : 'INV';
                    ?>
                    <tr>
                        <td><?= !empty($inv['is_pos']) && !empty($inv['transaction_no']) ? htmlspecialchars($inv['transaction_no']) : $prefix . '-' . str_pad((string)$inv['id'], 5, '0', STR_PAD_LEFT) ?></td>
                        <td><?= $inv['invoice_date'] ?></td>
                        <td>
                            <?php if ($inv['due_date']): ?>
                                <?php 
                                    $isOverdue = strtotime($inv['due_date']) < time() && $inv['status'] !== 'paid';
                                ?>
                                <span class="<?= $isOverdue ? 'text-danger fw-bold' : '' ?>">
                                    <?= $inv['due_date'] ?>
                                    <?php if ($isOverdue): ?>
                                        <i class="bi bi-exclamation-triangle-fill ms-1" title="Overdue"></i>
                                    <?php endif; ?>
                                </span>
                            <?php else: ?>
                                ---
                            <?php endif; ?>
                        </td>
                        <td><?= htmlspecialchars($inv['customer_name'] ?? '---') ?></td>
                        <td>
                            <?php 
                                $statusClass = 'bg-secondary';
                                if ($inv['status'] === 'paid') $statusClass = 'bg-success';
                                elseif ($inv['status'] === 'unpaid') $statusClass = 'bg-danger';
                                elseif ($inv['status'] === 'partially_paid') $statusClass = 'bg-warning text-dark';
                            ?>
                            <span class="badge text-uppercase <?= $statusClass ?>"><?= htmlspecialchars(str_replace('_', ' ', $inv['status'])) ?></span>
                        </td>
                        <td class="text-end fw-bold">OMR <?= number_format((float)$inv['total_with_vat'], 3) ?></td>
                        <td class="text-end text-success">OMR <?= number_format((float)$inv['paid_amount'], 3) ?></td>
                        <td class="text-end text-danger fw-bold">OMR <?= number_format((float)($inv['total_with_vat'] - $inv['paid_amount']), 3) ?></td>
                        <td class="text-end d-print-none">
                            <div class="btn-group btn-group-sm">
                                <button class="btn btn-outline-info view-invoice-btn" data-json="<?= htmlspecialchars(json_encode($inv)) ?>" title="View"><i class="bi bi-eye"></i></button>
                                <button class="btn btn-outline-warning return-invoice-btn" data-id="<?= $inv['id'] ?>" data-bs-toggle="modal" data-bs-target="<?= $page === 'sales' ? '#addSalesReturnModal' : '#addPurchaseReturnModal' ?>" title="Return"><i class="bi bi-arrow-return-left"></i></button>
                                <button class="btn btn-outline-primary edit-invoice-btn" data-json="<?= htmlspecialchars(json_encode($inv)) ?>" data-bs-toggle="modal" data-bs-target="#editInvoiceModal" title="Edit"><i class="bi bi-pencil"></i></button>
                                <?php if ($inv['status'] !== 'paid'): ?>
                                <button class="btn btn-outline-success pay-invoice-btn" data-id="<?= $inv['id'] ?>" data-total="<?= $inv['total_with_vat'] ?>" data-paid="<?= $inv['paid_amount'] ?>" data-bs-toggle="modal" data-bs-target="#payInvoiceModal" title="Payment"><i class="bi bi-cash-coin"></i></button>
                                <?php endif; ?>
                                <button class="btn btn-outline-secondary print-a4-btn" data-json="<?= htmlspecialchars(json_encode($inv)) ?>" title="Print A4 Invoice"><i class="bi bi-printer"></i></button>
                                <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure you want to delete this invoice?')">
                                    <input type="hidden" name="id" value="<?= $inv['id'] ?>">
                                    <button type="submit" name="delete_invoice" class="btn btn-outline-danger" title="Delete"><i class="bi bi-trash"></i></button>
                                </form>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
                <tfoot>
                    <tr class="fw-bold bg-light">
                        <td colspan="5" class="text-end" data-en="Totals" data-ar="الإجمالي">Totals</td>
                        <td class="text-end">OMR <?= number_format((float)$total_all, 3) ?></td>
                        <td class="text-end text-success">OMR <?= number_format((float)$total_paid, 3) ?></td>
                        <td class="text-end text-danger">OMR <?= number_format((float)$total_balance, 3) ?></td>
                        <td class="d-print-none"></td>
                    </tr>
                </tfoot>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        

    </div>

    <?php elseif ($page === 'customer_statement' || $page === 'supplier_statement'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4 d-print-none">
            <?php 
            $entity_suffix = isset($data['selected_entity']['name']) ? ' - ' . htmlspecialchars($data['selected_entity']['name']) : '';
            $page_title_en = $currTitle['en'] . $entity_suffix;
            $page_title_ar = $currTitle['ar'] . $entity_suffix;
            ?>
            <h5 class="m-0" data-en="<?= $page_title_en ?>" data-ar="<?= $page_title_ar ?>"><?= $lang === 'ar' ? $page_title_ar : $page_title_en ?></h5>
            <button class="btn btn-outline-secondary d-print-none" onclick="window.print()">
                <i class="bi bi-printer"></i> <span data-en="Print" data-ar="طباعة"><?= $lang === 'ar' ? 'طباعة' : 'Print' ?></span>
            </button>
        </div>

        <div class="bg-light p-3 rounded mb-4 d-print-none">
            <form method="GET" class="row g-3 align-items-end">
                <input type="hidden" name="page" value="<?= $page ?>">
                <div class="col-md-4">
                    <label class="form-label small fw-bold" data-en="Select <?= $page === 'customer_statement' ? 'Customer' : 'Supplier' ?>" data-ar="اختر <?= $page === 'customer_statement' ? 'العميل' : 'المورد' ?>"><?= $lang === 'ar' ? ($page === 'customer_statement' ? 'اختر العميل' : 'اختر المورد') : 'Select ' . ($page === 'customer_statement' ? 'Customer' : 'Supplier') ?></label>
                    <select name="entity_id" class="form-select select2" required>
                        <option value="">---</option>
                        <?php foreach ($data['entities'] as $e): ?>
                        <option value="<?= $e['id'] ?>" <?= (($_GET['entity_id'] ?? '') == $e['id']) ? 'selected' : '' ?>><?= htmlspecialchars($e['name']) ?></option>
                        <?php endforeach; ?>
                    </select>
                </div>
                <div class="col-md-3">
                    <label class="form-label small fw-bold" data-en="From Date" data-ar="من تاريخ"><?= $lang === 'ar' ? 'من تاريخ' : 'From Date' ?></label>
                    <input type="date" name="start_date" class="form-control" value="<?= htmlspecialchars($_GET['start_date'] ?? date('Y-m-01')) ?>">
                </div>
                <div class="col-md-3">
                    <label class="form-label small fw-bold" data-en="To Date" data-ar="إلى تاريخ"><?= $lang === 'ar' ? 'إلى تاريخ' : 'To Date' ?></label>
                    <input type="date" name="end_date" class="form-control" value="<?= htmlspecialchars($_GET['end_date'] ?? date('Y-m-d')) ?>">
                </div>
                <div class="col-md-2">
                    <button type="submit" class="btn btn-primary w-100">
                        <i class="bi bi-search"></i> <span data-en="View Report" data-ar="عرض التقرير"><?= $lang === 'ar' ? 'عرض التقرير' : 'View Report' ?></span>
                    </button>
                </div>
            
                <div class="col-md-auto ms-auto d-flex align-items-end mt-2 mt-md-0">
                    <div class="input-group input-group-sm w-auto">
                        <span class="input-group-text" data-en="Limit" data-ar="الحد">Limit</span>
                        <select name="limit" class="form-select" onchange="this.form.submit()">
                            <option value="20" <?= (($_GET['limit'] ?? 20) == 20) ? 'selected' : '' ?>>20</option>
                            <option value="40" <?= (($_GET['limit'] ?? 20) == 40) ? 'selected' : '' ?>>40</option>
                            <option value="60" <?= (($_GET['limit'] ?? 20) == 60) ? 'selected' : '' ?>>60</option>
                            <option value="100" <?= (($_GET['limit'] ?? 20) == 100) ? 'selected' : '' ?>>100</option>
                        </select>
                    </div>
                </div>
            </form>
        </div>

        <?php if (isset($data['transactions'])): ?>
        <div id="statement-print">
            <div class="row mb-4">
                <div class="col-6">
                    <h3 class="mb-0"><?= htmlspecialchars($data['settings']['company_name'] ?? 'Accounting System') ?></h3>
                    <p class="text-muted small"><?= nl2br(htmlspecialchars($data['settings']['company_address'] ?? '')) ?></p>
                </div>
                <div class="col-6 text-end">
                    <h2 class="text-uppercase text-muted" data-en="Statement of Account - <?= htmlspecialchars($data['selected_entity']['name']) ?>" data-ar="كشف حساب - <?= htmlspecialchars($data['selected_entity']['name']) ?>"><?= $lang === 'ar' ? 'كشف حساب' : 'Statement of Account' ?> - <?= htmlspecialchars($data['selected_entity']['name']) ?></h2>
                    <p class="mb-0"><strong><?= htmlspecialchars($data['selected_entity']['name']) ?></strong></p>
                    <p class="text-muted small"><?= htmlspecialchars($data['selected_entity']['email']) ?> | <?= htmlspecialchars($data['selected_entity']['phone']) ?><br><span data-en="Period" data-ar="الفترة"><?= $lang === 'ar' ? 'الفترة' : 'Period' ?></span>: <?= $_GET['start_date'] ?> <span data-en="to" data-ar="إلى"><?= $lang === 'ar' ? 'إلى' : 'to' ?></span> <?= $_GET['end_date'] ?></p>
                </div>
            </div>
            <div class="table-responsive">
                <table class="table table-bordered table-sm">
                    <thead class="bg-light">
                        <tr>
                            <th data-en="Date" data-ar="التاريخ"><?= $lang === 'ar' ? 'التاريخ' : 'Date' ?></th>
                            <th data-en="Reference" data-ar="المرجع"><?= $lang === 'ar' ? 'المرجع' : 'Reference' ?></th>
                            <th data-en="Description" data-ar="الوصف"><?= $lang === 'ar' ? 'الوصف' : 'Description' ?></th>
                            <th data-en="Debit" data-ar="مدين" class="text-end"><?= $lang === 'ar' ? 'مدين' : 'Debit' ?></th>
                            <th data-en="Credit" data-ar="دائن" class="text-end"><?= $lang === 'ar' ? 'دائن' : 'Credit' ?></th>
                            <th data-en="Balance" data-ar="الرصيد" class="text-end"><?= $lang === 'ar' ? 'الرصيد' : 'Balance' ?></th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php 
                        $running_balance = 0;
                        foreach ($data['transactions'] as $t): 
                            $debit = 0; $credit = 0;
                            if ($t['trans_type'] === 'invoice') {
                                if ($page === 'customer_statement') $debit = (float)$t['amount']; else $credit = (float)$t['amount'];
                            } else {
                                if ($page === 'customer_statement') $credit = (float)$t['amount']; else $debit = (float)$t['amount'];
                            }
                            $running_balance += ($debit - $credit);
                        ?>
                        <tr>
                            <td><?= $t['trans_date'] ?></td>
                            <td><?= $t['trans_type'] === 'invoice' ? ($lang === 'ar' ? ($page === 'supplier_statement' ? 'شراء-' : 'بيع-') : ($page === 'supplier_statement' ? 'PUR-' : 'INV-')).str_pad((string)$t['ref_no'], 5, '0', STR_PAD_LEFT) : ($lang === 'ar' ? 'قبض-' : 'RCP-').str_pad((string)$t['id'], 5, '0', STR_PAD_LEFT) ?></td>
                            <td>
                                <?php if ($t['trans_type'] === 'invoice'): ?>
                                    <span data-en="Tax Invoice" data-ar="فاتورة ضريبية"><?= $lang === 'ar' ? 'فاتورة ضريبية' : 'Tax Invoice' ?></span>
                                <?php else: ?>
                                    <span data-en="Payment" data-ar="دفع"><?= $lang === 'ar' ? 'دفع' : 'Payment' ?></span> - <span data-en="<?= $t['payment_method'] ?>" data-ar="<?= $t['payment_method'] === 'cash' ? 'نقد' : ($t['payment_method'] === 'card' ? 'بطاقة ائتمان' : 'آجل') ?>"><?= $lang === 'ar' ? ($t['payment_method'] === 'cash' ? 'نقد' : ($t['payment_method'] === 'card' ? 'بطاقة ائتمان' : 'آجل')) : $t['payment_method'] ?></span>
                                <?php endif; ?>
                            </td>
                            <td class="text-end"><?= number_format($debit, 3) ?></td>
                            <td class="text-end"><?= number_format($credit, 3) ?></td>
                            <td class="text-end"><?= number_format($running_balance, 3) ?></td>
                        </tr>
                        <?php endforeach; ?>
                    </tbody>
                    <tfoot class="bg-light fw-bold">
                        <tr>
                            <td colspan="5" class="text-end" data-en="Closing Balance" data-ar="رصيد الإقفال"><?= $lang === 'ar' ? 'رصيد الإقفال' : 'Closing Balance' ?></td>
                            <td class="text-end" data-en="OMR <?= number_format($running_balance, 3) ?>" data-ar="<?= number_format($running_balance, 3) ?> ر.ع."><?= $lang === 'ar' ? number_format($running_balance, 3) . ' ر.ع.' : 'OMR ' . number_format($running_balance, 3) ?></td>
                        </tr>
                    </tfoot>
            </table>
        </div>
        
        <!-- Print Footer / Signatures -->
        <div class="print-only mt-5">
            <div class="row text-center mt-5">
                <div class="col-4">
                    <div class="border-top pt-2" data-en="Prepared By" data-ar="أعد بواسطة">Prepared By</div>
                </div>
                <div class="col-4">
                    <div class="border-top pt-2" data-en="Checked By" data-ar="روجع بواسطة">Checked By</div>
                </div>
                <div class="col-4">
                    <div class="border-top pt-2" data-en="Authorized Signature" data-ar="التوقيع المعتمد">Authorized Signature</div>
                </div>
            </div>
            <div class="mt-4 text-center text-muted small">
                <span data-en="Printed on" data-ar="طبع في">Printed on</span> <?= date('Y-m-d H:i:s') ?>
            </div>
        </div>
    </div>
        <?php else: ?>
            <div class="text-center py-5 text-muted"><p data-en="Please select an entity and date range to generate the statement." data-ar="يرجى اختيار جهة ونطاق تاريخي لتوليد كشف الحساب.">Please select an entity and date range to generate the statement.</p></div>
        <?php endif; ?>
    </div>

    <?php elseif ($page === 'cashflow_report'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4 d-print-none">
            <h5 class="m-0" data-en="Cashflow Statement" data-ar="قائمة التدفقات النقدية">Cashflow Statement</h5>
            <button class="btn btn-outline-secondary d-print-none" onclick="window.print()">
                <i class="bi bi-printer"></i> <span data-en="Print" data-ar="طباعة">Print</span>
            </button>
        </div>

        <div class="bg-light p-3 rounded mb-4 d-print-none">
            <form method="GET" class="row g-3 align-items-end">
                <input type="hidden" name="page" value="<?= $page ?>">
                <div class="col-md-5">
                    <label class="form-label small fw-bold" data-en="From Date" data-ar="من تاريخ">From Date</label>
                    <input type="date" name="start_date" class="form-control" value="<?= htmlspecialchars($_GET['start_date'] ?? date('Y-m-01')) ?>">
                </div>
                <div class="col-md-5">
                    <label class="form-label small fw-bold" data-en="To Date" data-ar="إلى تاريخ">To Date</label>
                    <input type="date" name="end_date" class="form-control" value="<?= htmlspecialchars($_GET['end_date'] ?? date('Y-m-d')) ?>">
                </div>
                <div class="col-md-2">
                    <button type="submit" class="btn btn-primary w-100">
                        <i class="bi bi-search"></i> <span data-en="Generate" data-ar="توليد">Generate</span>
                    </button>
                </div>
            
                <div class="col-md-auto ms-auto d-flex align-items-end mt-2 mt-md-0">
                    <div class="input-group input-group-sm w-auto">
                        <span class="input-group-text" data-en="Limit" data-ar="الحد">Limit</span>
                        <select name="limit" class="form-select" onchange="this.form.submit()">
                            <option value="20" <?= (($_GET['limit'] ?? 20) == 20) ? 'selected' : '' ?>>20</option>
                            <option value="40" <?= (($_GET['limit'] ?? 20) == 40) ? 'selected' : '' ?>>40</option>
                            <option value="60" <?= (($_GET['limit'] ?? 20) == 60) ? 'selected' : '' ?>>60</option>
                            <option value="100" <?= (($_GET['limit'] ?? 20) == 100) ? 'selected' : '' ?>>100</option>
                        </select>
                    </div>
                </div>
            </form>
        </div>

        <div id="cashflow-print">
            <div class="row mb-4">
                <div class="col-6">
                    <h3 class="mb-0"><?= htmlspecialchars($data['settings']['company_name'] ?? 'Accounting System') ?></h3>
                    <p class="text-muted small"><?= nl2br(htmlspecialchars($data['settings']['company_address'] ?? '')) ?></p>
                </div>
                <div class="col-6 text-end">
                    <h2 class="text-uppercase text-muted" data-en="Cashflow Statement" data-ar="قائمة التدفقات النقدية">Cashflow Statement</h2>
                    <p class="text-muted small">Period: <?= htmlspecialchars($_GET['start_date'] ?? date('Y-m-01')) ?> to <?= htmlspecialchars($_GET['end_date'] ?? date('Y-m-d')) ?></p>
                </div>
            </div>

            <table class="table table-bordered">
                <thead class="bg-light">
                    <tr>
                        <th data-en="Description" data-ar="الوصف">Description</th>
                        <th data-en="Amount (OMR)" data-ar="المبلغ (ريال عماني)" class="text-end">Amount (OMR)</th>
                    </tr>
                </thead>
                <tbody>
                    <tr class="fw-bold table-light">
                        <td data-en="Opening Cash Balance" data-ar="رصيد النقدية الافتتاحي">Opening Cash Balance</td>
                        <td class="text-end"><?= number_format($data['opening_balance'], 3) ?></td>
                    </tr>
                    
                    <tr>
                        <td colspan="2" class="fw-bold bg-light" data-en="Operating Activities" data-ar="الأنشطة التشغيلية">Operating Activities</td>
                    </tr>
                    <?php 
                    $op_inflow = 0; $op_outflow = 0;
                    $inv_inflow = 0; $inv_outflow = 0;
                    $fin_inflow = 0; $fin_outflow = 0;

                    foreach ($data['cash_transactions'] as $t) {
                        $amt = (float)$t['inflow'] - (float)$t['outflow'];
                        // Very simple categorization based on account type
                        if ($t['other_type'] === 'revenue' || $t['other_type'] === 'expense' || in_array($t['other_account'], ['Accounts Receivable', 'Accounts Payable', 'VAT Input', 'VAT Payable'])) {
                            if ($amt > 0) $op_inflow += $amt; else $op_outflow += abs($amt);
                        } elseif ($t['other_type'] === 'asset' && !in_array($t['other_account'], ['Accounts Receivable', 'Inventory'])) {
                            // Fixed assets etc
                            if ($amt > 0) $inv_inflow += $amt; else $inv_outflow += abs($amt);
                        } elseif ($t['other_type'] === 'equity' || $t['other_type'] === 'liability') {
                            if ($amt > 0) $fin_inflow += $amt; else $fin_outflow += abs($amt);
                        } else {
                            // Default to operating if unsure
                            if ($amt > 0) $op_inflow += $amt; else $op_outflow += abs($amt);
                        }
                    }
                    ?>
                    <tr>
                        <td class="ps-4" data-en="Cash Received from Customers & Others" data-ar="المقبوضات النقدية من العملاء وغيرهم">Cash Received from Customers & Others</td>
                        <td class="text-end text-success"><?= number_format($op_inflow, 3) ?></td>
                    </tr>
                    <tr>
                        <td class="ps-4" data-en="Cash Paid to Suppliers & Expenses" data-ar="المدفوعات النقدية للموردين والمصروفات">Cash Paid to Suppliers & Expenses</td>
                        <td class="text-end text-danger">(<?= number_format($op_outflow, 3) ?>)</td>
                    </tr>
                    <tr class="fw-bold">
                        <td data-en="Net Cash from Operating Activities" data-ar="صافي النقد من الأنشطة التشغيلية">Net Cash from Operating Activities</td>
                        <td class="text-end border-top"><?= number_format($op_inflow - $op_outflow, 3) ?></td>
                    </tr>

                    <tr>
                        <td colspan="2" class="fw-bold bg-light" data-en="Investing Activities" data-ar="الأنشطة الاستثمارية">Investing Activities</td>
                    </tr>
                    <tr>
                        <td class="ps-4" data-en="Net Cash from Investing Activities" data-ar="صافي النقد من الأنشطة الاستثمارية">Net Cash from Investing Activities</td>
                        <td class="text-end"><?= number_format($inv_inflow - $inv_outflow, 3) ?></td>
                    </tr>

                    <tr>
                        <td colspan="2" class="fw-bold bg-light" data-en="Financing Activities" data-ar="الأنشطة التمويلية">Financing Activities</td>
                    </tr>
                    <tr>
                        <td class="ps-4" data-en="Net Cash from Financing Activities" data-ar="صافي النقد من الأنشطة التمويلية">Net Cash from Financing Activities</td>
                        <td class="text-end"><?= number_format($fin_inflow - $fin_outflow, 3) ?></td>
                    </tr>

                    <tr class="fw-bold table-primary">
                        <?php $net_change = ($op_inflow - $op_outflow) + ($inv_inflow - $inv_outflow) + ($fin_inflow - $fin_outflow); ?>
                        <td data-en="Net Change in Cash" data-ar="صافي التغير في النقدية">Net Change in Cash</td>
                        <td class="text-end"><?= number_format($net_change, 3) ?></td>
                    </tr>
                    <tr class="fw-bold table-success">
                        <td data-en="Closing Cash Balance" data-ar="رصيد النقدية الختامي">Closing Cash Balance</td>
                        <td class="text-end"><?= number_format($data['opening_balance'] + $net_change, 3) ?></td>
                    </tr>
                </tbody>
            </table>
            
            <div class="mt-4 d-none d-print-block">
                <div class="row">
                    <div class="col-6">
                        <p>___________________<br>Prepared By</p>
                    </div>
                    <div class="col-6 text-end">
                        <p>___________________<br>Approved By</p>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <?php elseif ($page === 'payment_methods'): ?>
    <div class="card p-4 d-print-none">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="Payment Methods" data-ar="طرق الدفع">Payment Methods</h5>
            <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addPaymentMethodModal">
                <i class="bi bi-plus-lg"></i> <span data-en="Add Payment Method" data-ar="إضافة طريقة دفع">Add Payment Method</span>
            </button>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="ID" data-ar="المعرف">ID</th>
                        <th data-en="Name (EN)" data-ar="الاسم (EN)">Name (EN)</th>
                        <th data-en="Name (AR)" data-ar="الاسم (AR)">Name (AR)</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php if (empty($data['payment_methods'])): ?>
                    <tr>
                        <td colspan="4" class="text-center text-muted py-4" data-en="No payment methods found yet. Add one to get started." data-ar="لا توجد طرق دفع حتى الآن. أضف طريقة دفع للبدء.">No payment methods found yet. Add one to get started.</td>
                    </tr>
                    <?php else: ?>
                    <?php foreach ($data['payment_methods'] as $pm): ?>
                    <?php
                        $paymentMethodId = (int)($pm['id'] ?? 0);
                        $paymentMethodNameEn = (string)($pm['name_en'] ?? $pm['name'] ?? '');
                        $paymentMethodNameAr = (string)($pm['name_ar'] ?? $pm['name_en'] ?? $pm['name'] ?? '');
                    ?>
                    <tr>
                        <td><?= $paymentMethodId ?></td>
                        <td><?= htmlspecialchars($paymentMethodNameEn) ?></td>
                        <td><?= htmlspecialchars($paymentMethodNameAr) ?></td>
                        <td class="text-end">
                            <div class="btn-group btn-group-sm">
                                <button class="btn btn-outline-primary" title="Edit" data-bs-toggle="modal" data-bs-target="#editPaymentMethodModal<?= $paymentMethodId ?>"><i class="bi bi-pencil"></i></button>
                                <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                    <input type="hidden" name="id" value="<?= $paymentMethodId ?>">
                                    <button type="submit" name="delete_payment_method" class="btn btn-outline-danger" title="Delete"><i class="bi bi-trash"></i></button>
                                </form>
                            </div>

                            <div class="modal fade" id="editPaymentMethodModal<?= $paymentMethodId ?>" tabindex="-1">
                                <div class="modal-dialog">
                                    <div class="modal-content border-0 shadow text-start">
                                        <div class="modal-header">
                                            <h5 class="modal-title" data-en="Edit Payment Method" data-ar="تعديل طريقة الدفع">Edit Payment Method</h5>
                                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                        </div>
                                        <form method="POST">
                                            <input type="hidden" name="id" value="<?= $paymentMethodId ?>">
                                            <div class="modal-body">
                                                <div class="mb-3">
                                                    <label class="form-label" data-en="Name (EN)" data-ar="الاسم (EN)">Name (EN)</label>
                                                    <input type="text" name="name_en" class="form-control" value="<?= htmlspecialchars($paymentMethodNameEn) ?>" required>
                                                </div>
                                                <div class="mb-3">
                                                    <label class="form-label" data-en="Name (AR)" data-ar="الاسم (AR)">Name (AR)</label>
                                                    <input type="text" name="name_ar" class="form-control" value="<?= htmlspecialchars($paymentMethodNameAr) ?>" required>
                                                </div>
                                            </div>
                                            <div class="modal-footer">
                                                <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                                <button type="submit" name="edit_payment_method" class="btn btn-primary" data-en="Update" data-ar="تحديث">Update</button>
                                            </div>
                                        </form>
                                    </div>
                                </div>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                    <?php endif; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <!-- Add Payment Method Modal -->
    <div class="modal fade" id="addPaymentMethodModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content border-0 shadow">
                <div class="modal-header">
                    <h5 class="modal-title" data-en="Add Payment Method" data-ar="إضافة طريقة دفع">Add Payment Method</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <div class="mb-3">
                            <label class="form-label" data-en="Name (EN)" data-ar="الاسم (EN)">Name (EN)</label>
                            <input type="text" name="name_en" class="form-control" required>
                        </div>
                        <div class="mb-3">
                            <label class="form-label" data-en="Name (AR)" data-ar="الاسم (AR)">Name (AR)</label>
                            <input type="text" name="name_ar" class="form-control" required>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_payment_method" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
    <?php elseif ($page === 'expense_categories'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="Expense Categories" data-ar="فئات المصروفات">Expense Categories</h5>
            <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addExpenseCategoryModal">
                <i class="bi bi-plus-lg"></i> <span data-en="Add Category" data-ar="إضافة فئة">Add Category</span>
            </button>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="ID" data-ar="المعرف">ID</th>
                        <th data-en="Name (EN)" data-ar="الاسم (إنجليزي)">Name (EN)</th>
                        <th data-en="Name (AR)" data-ar="الاسم (عربي)">Name (AR)</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['expense_categories'] as $cat): ?>
                    <tr>
                        <td><?= $cat['id'] ?></td>
                        <td><?= htmlspecialchars($cat['name_en']) ?></td>
                        <td><?= htmlspecialchars($cat['name_ar']) ?></td>
                        <td class="text-end">
                            <div class="btn-group btn-group-sm">
                                <button class="btn btn-outline-primary" data-bs-toggle="modal" data-bs-target="#editExpCatModal<?= $cat['id'] ?>"><i class="bi bi-pencil"></i></button>
                                <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                    <input type="hidden" name="id" value="<?= $cat['id'] ?>">
                                    <button type="submit" name="delete_expense_category" class="btn btn-outline-danger"><i class="bi bi-trash"></i></button>
                                </form>
                            </div>

                            <!-- Edit Modal -->
                            <div class="modal fade" id="editExpCatModal<?= $cat['id'] ?>" tabindex="-1">
                                <div class="modal-dialog">
                                    <div class="modal-content text-start">
                                        <div class="modal-header">
                                            <h5 class="modal-title">Edit Category</h5>
                                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                        </div>
                                        <form method="POST">
                                            <input type="hidden" name="id" value="<?= $cat['id'] ?>">
                                            <div class="modal-body">
                                                <div class="mb-3">
                                                    <label class="form-label">Name (EN)</label>
                                                    <div class="input-group">
                                                        <input type="text" name="name_en" id="editExpCatEn<?= $cat['id'] ?>" class="form-control" value="<?= htmlspecialchars($cat['name_en']) ?>" required>
                                                        <button class="btn btn-outline-secondary btn-translate" type="button" data-source="editExpCatAr<?= $cat['id'] ?>" data-target="editExpCatEn<?= $cat['id'] ?>" data-to="en">
                                                            <i class="bi bi-translate"></i>
                                                        </button>
                                                    </div>
                                                </div>
                                                <div class="mb-3">
                                                    <label class="form-label">Name (AR)</label>
                                                    <div class="input-group">
                                                        <input type="text" name="name_ar" id="editExpCatAr<?= $cat['id'] ?>" class="form-control" value="<?= htmlspecialchars($cat['name_ar']) ?>" required>
                                                        <button class="btn btn-outline-secondary btn-translate" type="button" data-source="editExpCatEn<?= $cat['id'] ?>" data-target="editExpCatAr<?= $cat['id'] ?>" data-to="ar">
                                                            <i class="bi bi-translate"></i>
                                                        </button>
                                                    </div>
                                                </div>
                                            </div>
                                            <div class="modal-footer">
                                                <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                                <button type="submit" name="edit_expense_category" class="btn btn-primary" data-en="Update" data-ar="تحديث">Update</button>
                                            </div>
                                        </form>
                                    </div>
                                </div>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <!-- Add Modal -->
    <div class="modal fade" id="addExpenseCategoryModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title">Add Category</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <div class="mb-3">
                            <label class="form-label">Name (EN)</label>
                            <input type="text" name="name_en" class="form-control" required>
                        </div>
                        <div class="mb-3">
                            <label class="form-label">Name (AR)</label>
                            <input type="text" name="name_ar" class="form-control" required>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_expense_category" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <?php elseif ($page === 'accounting'): ?>
    <?php require 'pages/accounting_view.php'; ?>
    <?php elseif ($page === 'expenses'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="Expenses List" data-ar="قائمة المصروفات">Expenses List</h5>
            <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addExpenseModal">
                <i class="bi bi-plus-lg"></i> <span data-en="Add Expense" data-ar="إضافة مصروف">Add Expense</span>
            </button>
        </div>

        <div class="bg-light p-3 rounded mb-4">
            <form method="GET" class="form-grid-3">
                <input type="hidden" name="page" value="expenses">
                <div class="col-md-3">
                    <label class="form-label small" data-en="Category" data-ar="الفئة">Category</label>
                    <select name="category_id" class="form-select">
                        <option value="">All</option>
                        <?php foreach ($data['expense_categories'] as $c): ?>
                        <option value="<?= $c['id'] ?>" <?= ($_GET['category_id'] ?? '') == $c['id'] ? 'selected' : '' ?>><?= htmlspecialchars($c['name_en']) ?></option>
                        <?php endforeach; ?>
                    </select>
                </div>
                <div class="col-md-3">
                    <label class="form-label small">Start Date</label>
                    <input type="date" name="start_date" class="form-control" value="<?= htmlspecialchars($_GET['start_date'] ?? '') ?>">
                </div>
                <div class="col-md-3">
                    <label class="form-label small">End Date</label>
                    <input type="date" name="end_date" class="form-control" value="<?= htmlspecialchars($_GET['end_date'] ?? '') ?>">
                </div>
                <div class="col-md-3 d-flex align-items-end gap-1">
                    <button type="submit" class="btn btn-primary flex-grow-1" data-en="Filter" data-ar="تصفية">Filter</button>
                    <div class="dropdown d-inline-block">
                        <button class="btn btn-outline-success dropdown-toggle" type="button" data-bs-toggle="dropdown">
                            <i class="bi bi-download"></i> <span data-en="Export" data-ar="تصدير">Export</span>
                        </button>
                        <ul class="dropdown-menu">
                            <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => 'expenses', 'format' => 'csv'])) ?>"><i class="bi bi-filetype-csv me-2"></i> CSV</a></li>
                            <li><a class="dropdown-item" href="index.php?<?= http_build_query(array_merge($_GET, ['page' => 'export', 'type' => 'expenses', 'format' => 'excel'])) ?>"><i class="bi bi-file-earmark-excel me-2"></i> Excel</a></li>
                        </ul>
                    </div>
                </div>
            </form>
        </div>

        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="Date" data-ar="التاريخ">Date</th>
                        <th>Reference</th>
                        <th data-en="Category" data-ar="الفئة">Category</th>
                        <th data-en="Description" data-ar="الوصف">Description</th>
                        <th class="text-end" data-en="Amount" data-ar="المبلغ">Amount</th>
                        <th class="text-end" data-en="Actions" data-ar="إجراءات">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['expenses'] as $exp): ?>
                    <tr>
                        <td><?= $exp['expense_date'] ?></td>
                        <td><?= htmlspecialchars($exp['reference_no'] ?: '---') ?></td>
                        <td><?= htmlspecialchars($exp['cat_en'] ?? 'Unknown') ?></td>
                        <td><?= htmlspecialchars($exp['description']) ?></td>
                        <td class="text-end fw-bold">OMR <?= number_format((float)$exp['amount'], 3) ?></td>
                        <td class="text-end">
                            <div class="btn-group btn-group-sm">
                                <button class="btn btn-outline-primary" data-bs-toggle="modal" data-bs-target="#editExpenseModal<?= $exp['id'] ?>"><i class="bi bi-pencil"></i></button>
                                <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                    <input type="hidden" name="id" value="<?= $exp['id'] ?>">
                                    <button type="submit" name="delete_expense" class="btn btn-outline-danger"><i class="bi bi-trash"></i></button>
                                </form>
                            </div>

                            <!-- Edit Modal -->
                            <div class="modal fade" id="editExpenseModal<?= $exp['id'] ?>" tabindex="-1">
                                <div class="modal-dialog">
                                    <div class="modal-content text-start">
                                        <div class="modal-header">
                                            <h5 class="modal-title">Edit Expense</h5>
                                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                        </div>
                                        <form method="POST">
                                            <input type="hidden" name="id" value="<?= $exp['id'] ?>">
                                            <div class="modal-body">
                                                <div class="mb-3">
                                                    <label class="form-label" data-en="Category" data-ar="الفئة">Category</label>
                            <select name="category_id" class="form-select select2" required>
                                                        <?php foreach ($data['expense_categories'] as $c): ?>
                                                        <option value="<?= $c['id'] ?>" <?= $c['id'] == $exp['category_id'] ? 'selected' : '' ?>><?= htmlspecialchars($c['name_en']) ?></option>
                                                        <?php endforeach; ?>
                                                    </select>
                                                </div>
                                                <div class="mb-3">
                                                    <label class="form-label" data-en="Date" data-ar="التاريخ">Date</label>
                                                    <input type="date" name="expense_date" class="form-control" value="<?= $exp['expense_date'] ?>" required>
                                                </div>
                                                <div class="mb-3">
                                                    <label class="form-label" data-en="Amount" data-ar="المبلغ">Amount</label>
                                                    <input type="number" step="0.001" name="amount" class="form-control" value="<?= (float)$exp['amount'] ?>" required>
                                                </div>
                                                <div class="mb-3">
                                                    <label class="form-label">Reference No</label>
                                                    <input type="text" name="reference_no" class="form-control" value="<?= htmlspecialchars($exp['reference_no']) ?>">
                                                </div>
                                                <div class="mb-3">
                                                    <label class="form-label" data-en="Description" data-ar="الوصف">Description</label>
                                                    <textarea name="description" class="form-control"><?= htmlspecialchars($exp['description']) ?></textarea>
                                                </div>
                                            </div>
                                            <div class="modal-footer">
                                                <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                                <button type="submit" name="edit_expense" class="btn btn-primary" data-en="Update" data-ar="تحديث">Update</button>
                                            </div>
                                        </form>
                                    </div>
                                </div>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <!-- Add Expense Modal -->
    <div class="modal fade" id="addExpenseModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title">Add Expense</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <div class="mb-3">
                            <label class="form-label" data-en="Category" data-ar="الفئة">Category</label>
                            <select name="category_id" class="form-select" required>
                                <option value="">Select Category</option>
                                <?php foreach ($data['expense_categories'] as $c): ?>
                                <option value="<?= $c['id'] ?>"><?= htmlspecialchars($c['name_en']) ?></option>
                                <?php endforeach; ?>
                            </select>
                        </div>
                        <div class="mb-3">
                            <label class="form-label" data-en="Date" data-ar="التاريخ">Date</label>
                            <input type="date" name="expense_date" class="form-control" value="<?= date('Y-m-d') ?>" required>
                        </div>
                        <div class="mb-3">
                            <label class="form-label" data-en="Amount" data-ar="المبلغ">Amount</label>
                            <input type="number" step="0.001" name="amount" class="form-control" required>
                        </div>
                        <div class="mb-3">
                            <label class="form-label">Reference No</label>
                            <input type="text" name="reference_no" class="form-control">
                        </div>
                        <div class="mb-3">
                            <label class="form-label" data-en="Description" data-ar="الوصف">Description</label>
                            <textarea name="description" class="form-control"></textarea>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_expense" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <?php elseif ($page === 'expense_report'): ?>
    <div class="card p-4">
        <!-- Formal Print Header -->
        <div class="print-only mb-4">
            <div class="row align-items-center">
                <div class="col-6">
                    <?php if (!empty($data['settings']['company_logo'])): ?>
                        <img src="<?= htmlspecialchars($data['settings']['company_logo']) ?>" alt="Logo" style="max-height: 80px;" class="mb-2">
                    <?php endif; ?>
                    <h3 class="mb-1 fw-bold"><?= htmlspecialchars($data['settings']['company_name'] ?? 'Accounting System') ?></h3>
                    <p class="text-muted small mb-0"><?= nl2br(htmlspecialchars($data['settings']['company_address'] ?? '')) ?></p>
                    <p class="text-muted small mb-0">VAT: <?= htmlspecialchars($data['settings']['vat_number'] ?? '') ?></p>
                </div>
                <div class="col-6 text-end">
                    <h2 class="text-uppercase text-muted" data-en="Expense Report" data-ar="تقرير المصروفات">Expense Report</h2>
                    <p class="mb-0">Date: <?= date('Y-m-d') ?></p>
                    <p class="mb-0">Period: <?= htmlspecialchars($_GET['start_date'] ?? date('Y-m-01')) ?> - <?= htmlspecialchars($_GET['end_date'] ?? date('Y-m-d')) ?></p>
                </div>
            </div>
            <hr>
        </div>

        <div class="d-flex justify-content-between align-items-center mb-4 d-print-none">
            <h5 class="m-0" data-en="Expense Report" data-ar="تقرير المصروفات">Expense Report</h5>
            <button class="btn btn-outline-secondary" onclick="window.print()">
                <i class="bi bi-printer"></i> <span data-en="Print" data-ar="طباعة">Print</span>
            </button>
        </div>

        <div class="bg-light p-3 rounded mb-4 d-print-none">
            <form method="GET" class="form-grid-3">
                <input type="hidden" name="page" value="expense_report">
                <div class="col-md-3">
                    <label class="form-label small fw-bold" data-en="From Date" data-ar="من تاريخ">From Date</label>
                    <input type="date" name="start_date" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['start_date'] ?? date('Y-m-01')) ?>">
                </div>
                <div class="col-md-3">
                    <label class="form-label small fw-bold" data-en="To Date" data-ar="إلى تاريخ">To Date</label>
                    <input type="date" name="end_date" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['end_date'] ?? date('Y-m-d')) ?>">
                </div>
                <div class="col-md-3">
                    <label class="form-label small fw-bold" data-en="Category" data-ar="الفئة">Category</label>
                    <select name="category_id" class="form-select form-select-sm">
                        <option value="" data-en="All Categories" data-ar="كل الفئات">All Categories</option>
                        <?php foreach ($data['expense_categories'] as $cat): ?>
                            <option value="<?= $cat['id'] ?>" <?= (isset($_GET['category_id']) && $_GET['category_id'] == $cat['id']) ? 'selected' : '' ?>>
                                <?= htmlspecialchars($cat['name_en']) ?> / <?= htmlspecialchars($cat['name_ar']) ?>
                            </option>
                        <?php endforeach; ?>
                    </select>
                </div>
                <div class="col-md-3 d-flex align-items-end">
                    <button type="submit" class="btn btn-primary btn-sm w-100" data-en="Generate Report" data-ar="توليد التقرير">Generate Report</button>
                </div>
            </form>
        </div>

        <div class="row mb-4">
            <div class="col-md-12">
                <div class="card bg-light border-0 shadow-sm">
                    <div class="card-body text-center">
                        <h6 class="text-muted text-uppercase mb-2" data-en="Total Expenses" data-ar="إجمالي المصروفات">Total Expenses</h6>
                        <h2 class="text-danger mb-0">OMR <?= number_format((float)$data['total_expenses'], 3) ?></h2>
                        <small class="text-muted" data-en="For the selected period" data-ar="للفترة المختارة">For the selected period</small>
                    </div>
                </div>
            </div>
        </div>

        <div class="table-responsive">
            <table class="table table-bordered table-striped">
                <thead class="bg-light">
                    <tr>
                        <th data-en="Category" data-ar="الفئة">Category</th>
                        <th class="text-end" data-en="Total Amount" data-ar="إجمالي المبلغ">Total Amount</th>
                        <th class="text-end" data-en="% of Total" data-ar="نسبة الإجمالي">% of Total</th>
                    </tr>
                </thead>
                <tbody>
                    <?php if (empty($data['report_by_category'])): ?>
                    <tr><td colspan="3" class="text-center text-muted" data-en="No expenses found for this period." data-ar="لم يتم العثور على مصروفات لهذه الفترة.">No expenses found for this period.</td></tr>
                    <?php else: ?>
                        <?php foreach ($data['report_by_category'] as $row): 
                            $percent = $data['total_expenses'] > 0 ? ($row['total'] / $data['total_expenses'] * 100) : 0;
                        ?>
                        <tr>
                            <td>
                                <div class="fw-bold"><?= htmlspecialchars($row['name_en']) ?></div>
                                <div class="text-muted small"><?= htmlspecialchars($row['name_ar']) ?></div>
                            </td>
                            <td class="text-end fw-bold text-dark">OMR <?= number_format((float)$row['total'], 3) ?></td>
                            <td class="text-end">
                                <div class="progress" style="height: 5px;">
                                    <div class="progress-bar bg-danger" role="progressbar" style="width: <?= $percent ?>%"></div>
                                </div>
                                <small><?= number_format($percent, 1) ?>%</small>
                            </td>
                        </tr>
                        <?php endforeach; ?>
                    <?php endif; ?>
                </tbody>
            </table>
        </div>
        
        <div class="print-only mt-5">
            <div class="row">
                <div class="col-4 text-center">
                    <hr class="mx-4">
                    <p data-en="Prepared By" data-ar="أعد بواسطة">Prepared By</p>
                </div>
                <div class="col-4 text-center">
                </div>
                <div class="col-4 text-center">
                    <hr class="mx-4">
                    <p data-en="Approved By" data-ar="اعتمد بواسطة">Approved By</p>
                </div>
            </div>
        </div>
    </div>

    <?php elseif ($page === 'sales_returns'): ?>
    <div class="card p-4">
        <!-- Print Header -->
        <div class="print-only mb-4">
            <div class="row align-items-center">
                <div class="col-6">
                    <?php if (!empty($data['settings']['company_logo'])): ?>
                        <img src="<?= htmlspecialchars($data['settings']['company_logo']) ?>" alt="Logo" style="max-height: 80px;" class="mb-2">
                    <?php endif; ?>
                    <h3 class="mb-1 fw-bold"><?= htmlspecialchars($data['settings']['company_name'] ?? 'Accounting System') ?></h3>
                    <p class="text-muted small mb-0"><?= nl2br(htmlspecialchars($data['settings']['company_address'] ?? '')) ?></p>
                    <p class="text-muted small mb-0">VAT: <?= htmlspecialchars($data['settings']['vat_number'] ?? '') ?></p>
                </div>
                <div class="col-6 text-end">
                    <h2 class="text-uppercase text-muted">Sales Returns Report</h2>
                    <p class="mb-0">Date: <?= date('Y-m-d') ?></p>
                </div>
            </div>
            <hr>
        </div>
        <div class="d-flex justify-content-between align-items-center mb-4 d-print-none">
            <h5 class="m-0" data-en="Sales Returns" data-ar="مرتجع المبيعات">Sales Returns</h5>
            <div class="d-flex gap-2">
                <a href="index.php?page=export&type=sales_returns&format=excel" class="btn btn-outline-success">
                    <i class="bi bi-download"></i> <span data-en="Export" data-ar="تصدير">Export</span>
                </a>
                <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addSalesReturnModal" id="createSalesReturnBtn">
                    <i class="bi bi-plus-lg"></i> <span data-en="Create New Return" data-ar="إنشاء مرتجع جديد">Create New Return</span>
                </button>
            </div>
        </div>

        <div class="bg-light p-3 rounded mb-4">
            <form method="GET" class="form-grid-3">
                <input type="hidden" name="page" value="sales_returns">
                <div class="col-md-9">
                    <input type="text" name="search" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['search'] ?? '') ?>" placeholder="Search by Return ID, Customer or Invoice ID...">
                </div>
                <div class="col-md-3">
                    <button type="submit" class="btn btn-primary btn-sm w-100" data-en="Filter" data-ar="تصفية">Filter</button>
                </div>
            </form>
        </div>

        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="Return #" data-ar="رقم المرتجع">Return #</th>
                        <th data-en="Date" data-ar="التاريخ">Date</th>
                        <th data-en="Invoice #" data-ar="رقم الفاتورة">Invoice #</th>
                        <th data-en="Customer" data-ar="العميل">Customer</th>
                        <th data-en="Total Amount" data-ar="إجمالي المرتجع" class="text-end">Total Amount</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['returns'] as $ret): ?>
                    <tr>
                        <td>RET-<?= str_pad((string)$ret['id'], 5, '0', STR_PAD_LEFT) ?></td>
                        <td><?= $ret['return_date'] ?></td>
                        <td>INV-<?= str_pad((string)$ret['invoice_id'], 5, '0', STR_PAD_LEFT) ?></td>
                        <td><?= htmlspecialchars($ret['customer_name'] ?? 'Walk-in') ?></td>
                        <td class="text-end fw-bold text-danger">OMR <?= number_format((float)$ret['total_amount'], 3) ?></td>
                        <td class="text-end">
                            <div class="btn-group btn-group-sm">
                                <button class="btn btn-outline-info view-return-btn" data-id="<?= $ret['id'] ?>"><i class="bi bi-eye"></i></button>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                    <?php if (empty($data['returns'])): ?>
                    <tr><td colspan="6" class="text-center py-4 text-muted">No returns found</td></tr>
                    <?php endif; ?>
                </tbody>
            </table>
        </div>
    </div>

    <?php elseif ($page === 'purchase_returns'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="Purchase Returns" data-ar="مرتجع المشتريات">Purchase Returns</h5>
            <div class="d-flex gap-2">
                <a href="index.php?page=export&type=purchase_returns&format=excel" class="btn btn-outline-success">
                    <i class="bi bi-download"></i> <span data-en="Export" data-ar="تصدير">Export</span>
                </a>
                <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addPurchaseReturnModal">
                    <i class="bi bi-plus-lg"></i> <span data-en="Create New Return" data-ar="إنشاء مرتجع جديد">Create New Return</span>
                </button>
            </div>
        </div>

        <div class="bg-light p-3 rounded mb-4">
            <form method="GET" class="form-grid-3">
                <input type="hidden" name="page" value="purchase_returns">
                <div class="col-md-9">
                    <input type="text" name="search" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['search'] ?? '') ?>" placeholder="Search by Return ID, Supplier or Invoice ID...">
                </div>
                <div class="col-md-3">
                    <button type="submit" class="btn btn-primary btn-sm w-100" data-en="Filter" data-ar="تصفية">Filter</button>
                </div>
            </form>
        </div>

        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="Return #" data-ar="رقم المرتجع">Return #</th>
                        <th data-en="Date" data-ar="التاريخ">Date</th>
                        <th data-en="Invoice #" data-ar="رقم الفاتورة">Invoice #</th>
                        <th data-en="Supplier" data-ar="المورد">Supplier</th>
                        <th data-en="Total Amount" data-ar="إجمالي المرتجع" class="text-end">Total Amount</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['returns'] as $ret): ?>
                    <tr>
                        <td>PRET-<?= str_pad((string)$ret['id'], 5, '0', STR_PAD_LEFT) ?></td>
                        <td><?= $ret['return_date'] ?></td>
                        <td>PUR-<?= str_pad((string)$ret['purchase_id'], 5, '0', STR_PAD_LEFT) ?></td>
                        <td><?= htmlspecialchars($ret['supplier_name'] ?? 'Unknown') ?></td>
                        <td class="text-end fw-bold text-danger">OMR <?= number_format((float)$ret['total_amount'], 3) ?></td>
                        <td class="text-end">
                            <div class="btn-group btn-group-sm">
                                <button class="btn btn-outline-info view-return-btn" data-id="<?= $ret['id'] ?>"><i class="bi bi-eye"></i></button>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                    <?php if (empty($data['returns'])): ?>
                    <tr><td colspan="6" class="text-center py-4 text-muted">No returns found</td></tr>
                    <?php endif; ?>
                </tbody>
            </table>
        </div>
    </div>

    <?php elseif ($page === 'hr_departments'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="HR Departments" data-ar="أقسام الموارد البشرية">HR Departments</h5>
            <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addHrDepartmentModal">
                <i class="bi bi-plus-lg"></i> <span data-en="Add Department" data-ar="إضافة قسم">Add Department</span>
            </button>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="ID" data-ar="المعرف">ID</th>
                        <th data-en="Department Name" data-ar="اسم القسم">Department Name</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['departments'] as $d): ?>
                    <tr>
                        <td><?= $d['id'] ?></td>
                        <td><?= htmlspecialchars($d['name']) ?></td>
                        <td class="text-end">
                            <button class="btn btn-sm btn-outline-primary" data-bs-toggle="modal" data-bs-target="#editHrDepartmentModal<?= $d['id'] ?>"><i class="bi bi-pencil"></i></button>
                            <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                <input type="hidden" name="id" value="<?= $d['id'] ?>">
                                <button type="submit" name="delete_hr_department" class="btn btn-sm btn-outline-danger"><i class="bi bi-trash"></i></button>
                            </form>
                        </td>
                    </tr>
                    <!-- Edit Dept Modal -->
                    <div class="modal fade" id="editHrDepartmentModal<?= $d['id'] ?>" tabindex="-1">
                        <div class="modal-dialog">
                            <div class="modal-content border-0 shadow">
                                <div class="modal-header">
                                    <h5 class="modal-title" data-en="Edit Department" data-ar="تعديل القسم">Edit Department</h5>
                                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                </div>
                                <form method="POST">
                                    <input type="hidden" name="id" value="<?= $d['id'] ?>">
                                    <div class="modal-body">
                                        <div class="mb-3">
                                            <label class="form-label" data-en="Department Name" data-ar="اسم القسم">Department Name</label>
                                            <input type="text" name="name" class="form-control" value="<?= htmlspecialchars($d['name']) ?>" required>
                                        </div>
                                    </div>
                                    <div class="modal-footer">
                                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                        <button type="submit" name="edit_hr_department" class="btn btn-primary" data-en="Update" data-ar="تحديث">Update</button>
                                    </div>
                                </form>
                            </div>
                        </div>
                    </div>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <?php elseif ($page === 'hr_employees'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="HR Employees" data-ar="موظفي الموارد البشرية">HR Employees</h5>
            <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addHrEmployeeModal">
                <i class="bi bi-plus-lg"></i> <span data-en="Add Employee" data-ar="إضافة موظف">Add Employee</span>
            </button>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="Name" data-ar="الاسم">Name</th>
                        <th data-en="Biometric ID" data-ar="معرف البصمة">Biometric ID</th>
                        <th data-en="Department" data-ar="القسم">Department</th>
                        <th data-en="Position" data-ar="المنصب">Position</th>
                        <th data-en="Salary" data-ar="الراتب">Salary</th>
                        <th data-en="Status" data-ar="الحالة">Status</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['employees'] as $e): ?>
                    <tr>
                        <td>
                            <div class="fw-bold"><?= htmlspecialchars($e['name']) ?></div>
                            <div class="small text-muted"><?= htmlspecialchars($e['email']) ?></div>
                        </td>
                        <td><span class="badge bg-light text-dark border"><?= htmlspecialchars($e['biometric_id'] ?? '---') ?></span></td>
                        <td><?= htmlspecialchars($e['dept_name'] ?? '---') ?></td>
                        <td><?= htmlspecialchars($e['position']) ?></td>
                        <td>OMR <?= number_format($e['salary'], 3) ?></td>
                        <td>
                            <span class="badge <?= $e['status'] === 'active' ? 'bg-success' : 'bg-danger' ?> text-uppercase">
                                <?= $e['status'] ?>
                            </span>
                        </td>
                        <td class="text-end">
                            <button class="btn btn-sm btn-outline-primary" data-bs-toggle="modal" data-bs-target="#editHrEmployeeModal<?= $e['id'] ?>"><i class="bi bi-pencil"></i></button>
                            <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                <input type="hidden" name="id" value="<?= $e['id'] ?>">
                                <button type="submit" name="delete_hr_employee" class="btn btn-sm btn-outline-danger"><i class="bi bi-trash"></i></button>
                            </form>
                        </td>
                    </tr>
                    <!-- Edit Employee Modal -->
                    <div class="modal fade" id="editHrEmployeeModal<?= $e['id'] ?>" tabindex="-1">
                        <div class="modal-dialog modal-lg">
                            <div class="modal-content border-0 shadow">
                                <div class="modal-header">
                                    <h5 class="modal-title" data-en="Edit Employee" data-ar="تعديل الموظف">Edit Employee</h5>
                                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                </div>
                                <form method="POST">
                                    <input type="hidden" name="id" value="<?= $e['id'] ?>">
                                    <div class="modal-body">
                                        <div class="form-grid-3">
                                            <div class="col-md-6">
                                                <label class="form-label" data-en="Full Name" data-ar="الاسم الكامل">Full Name</label>
                                                <input type="text" name="name" class="form-control" value="<?= htmlspecialchars($e['name']) ?>" required>
                                            </div>
                                            <div class="col-md-6">
                                                <label class="form-label" data-en="Department" data-ar="القسم">Department</label>
                                                <select name="department_id" class="form-select">
                                                    <option value="">--- Select ---</option>
                                                    <?php foreach ($data['departments'] as $d): ?>
                                                    <option value="<?= $d['id'] ?>" <?= $e['department_id'] == $d['id'] ? 'selected' : '' ?>><?= htmlspecialchars($d['name']) ?></option>
                                                    <?php endforeach; ?>
                                                </select>
                                            </div>
                                            <div class="col-md-6">
                                                <label class="form-label" data-en="Email" data-ar="البريد">Email</label>
                                                <input type="email" name="email" class="form-control" value="<?= htmlspecialchars($e['email']) ?>">
                                            </div>
                                            <div class="col-md-6">
                                                <label class="form-label" data-en="Phone" data-ar="الهاتف">Phone</label>
                                                <input type="text" name="phone" class="form-control" value="<?= htmlspecialchars($e['phone']) ?>">
                                            </div>
                                            <div class="col-md-4">
                                                <label class="form-label" data-en="Position" data-ar="المنصب">Position</label>
                                                <input type="text" name="position" class="form-control" value="<?= htmlspecialchars($e['position']) ?>">
                                            </div>
                                            <div class="col-md-4">
                                                <label class="form-label" data-en="Basic Salary" data-ar="الراتب الأساسي">Basic Salary</label>
                                                <input type="number" step="0.001" name="salary" class="form-control" value="<?= $e['salary'] ?>">
                                            </div>
                                            <div class="col-md-4">
                                                <label class="form-label" data-en="Biometric ID" data-ar="معرف البصمة">Biometric ID</label>
                                                <input type="text" name="biometric_id" class="form-control" value="<?= htmlspecialchars($e['biometric_id'] ?? '') ?>">
                                            </div>
                                            <div class="col-md-4">
                                                <label class="form-label" data-en="Joining Date" data-ar="تاريخ الانضمام">Joining Date</label>
                                                <input type="date" name="joining_date" class="form-control" value="<?= $e['joining_date'] ?>">
                                            </div>
                                            <div class="col-md-4">
                                                <label class="form-label" data-en="Status" data-ar="الحالة">Status</label>
                                                <select name="status" class="form-select">
                                                    <option value="active" <?= $e['status'] === 'active' ? 'selected' : '' ?>>Active</option>
                                                    <option value="inactive" <?= $e['status'] === 'inactive' ? 'selected' : '' ?>>Inactive</option>
                                                </select>
                                            </div>
                                        </div>
                                    </div>
                                    <div class="modal-footer">
                                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                        <button type="submit" name="edit_hr_employee" class="btn btn-primary" data-en="Update" data-ar="تحديث">Update</button>
                                    </div>
                                </form>
                            </div>
                        </div>
                    </div>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <?php elseif ($page === 'hr_attendance'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="HR Attendance" data-ar="حضور الموارد البشرية">HR Attendance</h5>
            <div class="d-flex gap-2">
                <form method="POST" class="d-inline">
                    <button type="submit" name="pull_biometric_data" class="btn btn-primary btn-sm">
                        <i class="bi bi-cloud-download"></i> <span data-en="Pull Data from Devices" data-ar="سحب البيانات من الأجهزة">Pull Data from Devices</span>
                    </button>
                </form>
                <button class="btn btn-outline-secondary btn-sm" data-bs-toggle="modal" data-bs-target="#biometricInfoModal">
                    <i class="bi bi-fingerprint"></i> <span data-en="Biometric Sync" data-ar="مزامنة البصمة">Biometric Sync</span>
                </button>
                <form method="GET" class="d-flex gap-2">
                    <input type="hidden" name="page" value="hr_attendance">
                    <input type="date" name="date" class="form-control form-control-sm" value="<?= $data['attendance_date'] ?>" onchange="this.form.submit()">
                </form>
            </div>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="Employee" data-ar="الموظف">Employee</th>
                        <th data-en="Department" data-ar="القسم">Department</th>
                        <th data-en="Status" data-ar="الحالة">Status</th>
                        <th data-en="Clock In" data-ar="وقت الدخول">Clock In</th>
                        <th data-en="Clock Out" data-ar="وقت الخروج">Clock Out</th>
                        <th data-en="Action" data-ar="إجراء" class="text-end">Action</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['employees'] as $e): ?>
                    <tr>
                        <td><?= htmlspecialchars($e['name']) ?></td>
                        <td><?= htmlspecialchars($e['dept_name'] ?? '---') ?></td>
                        <td>
                            <?php if ($e['status']): ?>
                                <span class="badge <?= $e['status'] === 'present' ? 'bg-success' : ($e['status'] === 'absent' ? 'bg-danger' : 'bg-warning') ?> text-uppercase">
                                    <?= $e['status'] ?>
                                </span>
                            <?php else: ?>
                                <span class="badge bg-secondary text-uppercase">Not Marked</span>
                            <?php endif; ?>
                        </td>
                        <td><?= $e['clock_in'] ?? '---' ?></td>
                        <td><?= $e['clock_out'] ?? '---' ?></td>
                        <td class="text-end">
                            <button class="btn btn-sm btn-outline-primary" data-bs-toggle="modal" data-bs-target="#markAttendanceModal<?= $e['id'] ?>">
                                <i class="bi bi-calendar-check"></i> <span data-en="Mark" data-ar="تسجيل">Mark</span>
                            </button>
                        </td>
                    </tr>
                    <!-- Attendance Modal -->
                    <div class="modal fade" id="markAttendanceModal<?= $e['id'] ?>" tabindex="-1">
                        <div class="modal-dialog">
                            <div class="modal-content border-0 shadow">
                                <div class="modal-header">
                                    <h5 class="modal-title" data-en="Mark Attendance" data-ar="تسجيل الحضور">Mark Attendance - <?= htmlspecialchars($e['name']) ?></h5>
                                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                </div>
                                <form method="POST">
                                    <input type="hidden" name="employee_id" value="<?= $e['id'] ?>">
                                    <input type="hidden" name="attendance_date" value="<?= $data['attendance_date'] ?>">
                                    <div class="modal-body">
                                        <div class="mb-3">
                                            <label class="form-label" data-en="Status" data-ar="الحالة">Status</label>
                                            <select name="status" class="form-select">
                                                <option value="present" <?= $e['status'] === 'present' ? 'selected' : '' ?>>Present</option>
                                                <option value="absent" <?= $e['status'] === 'absent' ? 'selected' : '' ?>>Absent</option>
                                                <option value="on_leave" <?= $e['status'] === 'on_leave' ? 'selected' : '' ?>>On Leave</option>
                                            </select>
                                        </div>
                                        <div class="form-grid-3">
                                            <div class="col-md-6">
                                                <label class="form-label" data-en="Clock In" data-ar="وقت الدخول">Clock In</label>
                                                <input type="time" name="clock_in" class="form-control" value="<?= $e['clock_in'] ?>">
                                            </div>
                                            <div class="col-md-6">
                                                <label class="form-label" data-en="Clock Out" data-ar="وقت الخروج">Clock Out</label>
                                                <input type="time" name="clock_out" class="form-control" value="<?= $e['clock_out'] ?>">
                                            </div>
                                        </div>
                                    </div>
                                    <div class="modal-footer">
                                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                        <button type="submit" name="mark_attendance" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
                                    </div>
                                </form>
                            </div>
                        </div>
                    </div>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <!-- Biometric Info Modal -->
    <div class="modal fade" id="biometricInfoModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content border-0 shadow">
                <div class="modal-header">
                    <h5 class="modal-title" data-en="Biometric Integration Info" data-ar="معلومات تكامل البصمة">Biometric Integration Info</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <p data-en="To sync attendance from your biometric device, use the following API endpoint:" data-ar="لمزامنة الحضور من جهاز البصمة الخاص بك، استخدم نقطة نهاية API التالية:">
                        To sync attendance from your biometric device, use the following API endpoint:
                    </p>
                    <div class="bg-light p-3 rounded mb-3 border">
                        <code><?= (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http") . "://$_SERVER[HTTP_HOST]" ?>/api/biometric_sync.php</code>
                    </div>
                    <p data-en="Expected JSON format:" data-ar="تنسيق JSON المتوقع:">Expected JSON format:</p>
                    <pre class="bg-dark text-light p-3 rounded">
[
  {
    "biometric_id": "101",
    "device_id": 1,
    "timestamp": "2026-02-17 08:30:00",
    "type": "in"
  },
  {
    "biometric_id": "101",
    "device_id": 1,
    "timestamp": "2026-02-17 17:30:00",
    "type": "out"
  }
]
                    </pre>
                    <p class="small text-muted" data-en="Note: Ensure Employee Biometric IDs match those in the device logs." data-ar="ملاحظة: تأكد من مطابقة معرفات الموظفين الحيوية مع تلك الموجودة في سجلات الجهاز.">
                        Note: Ensure Employee Biometric IDs match those in the device logs.
                    </p>
                </div>
            </div>
        </div>
    </div>

    <?php elseif ($page === 'hr_payroll'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="HR Payroll" data-ar="رواتب الموارد البشرية">HR Payroll</h5>
            <div class="d-flex gap-2">
                <form method="GET" class="d-flex gap-2">
                    <input type="hidden" name="page" value="hr_payroll">
                    <select name="month" class="form-select form-select-sm" onchange="this.form.submit()">
                        <?php for($m=1; $m<=12; $m++): ?>
                        <option value="<?= $m ?>" <?= $data['month'] == $m ? 'selected' : '' ?>><?= date('F', mktime(0, 0, 0, $m, 1)) ?></option>
                        <?php endfor; ?>
                    </select>
                    <select name="year" class="form-select form-select-sm" onchange="this.form.submit()">
                        <?php for($y=date('Y'); $y>=date('Y')-2; $y--): ?>
                        <option value="<?= $y ?>" <?= $data['year'] == $y ? 'selected' : '' ?>><?= $y ?></option>
                        <?php endfor; ?>
                    </select>
                </form>
                <button class="btn btn-primary btn-sm" data-bs-toggle="modal" data-bs-target="#generatePayrollModal">
                    <i class="bi bi-gear"></i> <span data-en="Generate" data-ar="توليد">Generate</span>
                </button>
            </div>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="Employee" data-ar="الموظف">Employee</th>
                        <th data-en="Basic" data-ar="الأساسي">Basic</th>
                        <th data-en="Bonus" data-ar="مكافأة">Bonus</th>
                        <th data-en="Deductions" data-ar="استقطاعات">Deductions</th>
                        <th data-en="Net Salary" data-ar="صافي الراتب">Net Salary</th>
                        <th data-en="Status" data-ar="الحالة">Status</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['payroll'] as $p): ?>
                    <tr>
                        <td><?= htmlspecialchars($p['emp_name']) ?></td>
                        <td>OMR <?= number_format($p['basic_salary'], 3) ?></td>
                        <td class="text-success">+ OMR <?= number_format($p['bonus'], 3) ?></td>
                        <td class="text-danger">- OMR <?= number_format($p['deductions'], 3) ?></td>
                        <td class="fw-bold">OMR <?= number_format($p['net_salary'], 3) ?></td>
                        <td>
                            <span class="badge <?= $p['status'] === 'paid' ? 'bg-success' : 'bg-warning' ?> text-uppercase">
                                <?= $p['status'] ?>
                            </span>
                        </td>
                        <td class="text-end">
                            <?php if ($p['status'] === 'pending'): ?>
                            <form method="POST" class="d-inline">
                                <input type="hidden" name="id" value="<?= $p['id'] ?>">
                                <button type="submit" name="pay_payroll" class="btn btn-sm btn-success" title="Mark Paid"><i class="bi bi-check-circle"></i></button>
                            </form>
                            <?php endif; ?>
                            <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                <input type="hidden" name="id" value="<?= $p['id'] ?>">
                                <button type="submit" name="delete_payroll" class="btn btn-sm btn-outline-danger"><i class="bi bi-trash"></i></button>
                            </form>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <!-- Generate Payroll Modal -->
    <div class="modal fade" id="generatePayrollModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content border-0 shadow">
                <div class="modal-header">
                    <h5 class="modal-title" data-en="Generate Payroll" data-ar="توليد الرواتب">Generate Payroll</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <input type="hidden" name="month" value="<?= $data['month'] ?>">
                    <input type="hidden" name="year" value="<?= $data['year'] ?>">
                    <div class="modal-body">
                        <div class="mb-3">
                            <label class="form-label" data-en="Employee" data-ar="الموظف">Employee</label>
                            <select name="employee_id" class="form-select select2" required>
                                <option value="">--- Select ---</option>
                                <?php foreach ($data['employees'] as $e): ?>
                                <option value="<?= $e['id'] ?>"><?= htmlspecialchars($e['name']) ?> (Basic: <?= number_format($e['salary'], 3) ?>)</option>
                                <?php endforeach; ?>
                            </select>
                        </div>
                        <div class="form-grid-3">
                            <div class="col-md-6">
                                <label class="form-label" data-en="Bonus" data-ar="مكافأة">Bonus</label>
                                <input type="number" step="0.001" name="bonus" class="form-control" value="0.000">
                            </div>
                            <div class="col-md-6">
                                <label class="form-label" data-en="Deductions" data-ar="استقطاعات">Deductions</label>
                                <input type="number" step="0.001" name="deductions" class="form-control" value="0.000">
                            </div>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="generate_payroll" class="btn btn-primary" data-en="Generate" data-ar="توليد">Generate</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <?php elseif ($page === 'devices'): ?>
    <div class="card p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="m-0" data-en="Biometric Devices" data-ar="أجهزة البصمة">Biometric Devices</h5>
            <button class="btn btn-primary btn-sm" data-bs-toggle="modal" data-bs-target="#addDeviceModal">
                <i class="bi bi-plus-circle"></i> <span data-en="Add Device" data-ar="إضافة جهاز">Add Device</span>
            </button>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="Device Name" data-ar="اسم الجهاز">Device Name</th>
                        <th data-en="IP / IO Address" data-ar="عنوان IP / IO">IP / IO Address</th>
                        <th data-en="Port" data-ar="المنفذ">Port</th>
                        <th data-en="Serial" data-ar="الرقم التسلسلي">Serial</th>
                        <th data-en="Last Sync" data-ar="آخر مزامنة">Last Sync</th>
                        <th data-en="Status" data-ar="الحالة">Status</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['devices'] as $d): ?>
                    <tr>
                        <td>
                            <strong><?= htmlspecialchars($d['device_name']) ?></strong>
                        </td>
                        <td>
                            <div><small class="text-muted">IP:</small> <?= htmlspecialchars($d['ip_address']) ?></div>
                            <?php if ($d['io_address']): ?>
                                <div><small class="text-muted">IO:</small> <?= htmlspecialchars($d['io_address']) ?></div>
                            <?php endif; ?>
                        </td>
                        <td><?= $d['port'] ?></td>
                        <td><?= htmlspecialchars($d['serial_number'] ?? '---') ?></td>
                        <td><?= $d['last_sync'] ?? 'Never' ?></td>
                        <td>
                            <span class="badge <?= $d['status'] === 'active' ? 'bg-success' : 'bg-danger' ?> text-uppercase">
                                <?= $d['status'] ?>
                            </span>
                        </td>
                        <td class="text-end">
                            <form method="POST" class="d-inline">
                                <input type="hidden" name="id" value="<?= $d['id'] ?>">
                                <button type="submit" name="test_device_connection" class="btn btn-sm btn-outline-info" title="Test Connection"><i class="bi bi-broadcast"></i></button>
                            </form>
                            <button class="btn btn-sm btn-outline-primary" data-bs-toggle="modal" data-bs-target="#editDeviceModal<?= $d['id'] ?>"><i class="bi bi-pencil"></i></button>
                            <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                <input type="hidden" name="id" value="<?= $d['id'] ?>">
                                <button type="submit" name="delete_biometric_device" class="btn btn-sm btn-outline-danger"><i class="bi bi-trash"></i></button>
                            </form>
                        </td>
                    </tr>

                    <!-- Edit Device Modal -->
                    <div class="modal fade" id="editDeviceModal<?= $d['id'] ?>" tabindex="-1">
                        <div class="modal-dialog">
                            <div class="modal-content border-0 shadow">
                                <div class="modal-header">
                                    <h5 class="modal-title" data-en="Edit Device" data-ar="تعديل الجهاز">Edit Device</h5>
                                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                </div>
                                <form method="POST">
                                    <input type="hidden" name="id" value="<?= $d['id'] ?>">
                                    <div class="modal-body">
                                        <div class="mb-3">
                                            <label class="form-label" data-en="Device Name" data-ar="اسم الجهاز">Device Name</label>
                                            <input type="text" name="device_name" class="form-control" value="<?= htmlspecialchars($d['device_name']) ?>" required>
                                        </div>
                                        <div class="row g-3 mb-3">
                                            <div class="col-md-8">
                                                <label class="form-label" data-en="IP Address" data-ar="عنوان IP">IP Address</label>
                                                <input type="text" name="ip_address" class="form-control" value="<?= htmlspecialchars($d['ip_address']) ?>" required>
                                            </div>
                                            <div class="col-md-4">
                                                <label class="form-label" data-en="Port" data-ar="المنفذ">Port</label>
                                                <input type="number" name="port" class="form-control" value="<?= $d['port'] ?>" required>
                                            </div>
                                        </div>
                                        <div class="mb-3">
                                            <label class="form-label" data-en="IO Address" data-ar="عنوان IO">IO Address</label>
                                            <input type="text" name="io_address" class="form-control" value="<?= htmlspecialchars($d['io_address']) ?>">
                                        </div>
                                        <div class="mb-3">
                                            <label class="form-label" data-en="Serial Number" data-ar="الرقم التسلسلي">Serial Number</label>
                                            <input type="text" name="serial_number" class="form-control" value="<?= htmlspecialchars($d['serial_number']) ?>">
                                        </div>
                                    </div>
                                    <div class="modal-footer">
                                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                        <button type="submit" name="edit_biometric_device" class="btn btn-primary" data-en="Update" data-ar="تحديث">Update</button>
                                    </div>
                                </form>
                            </div>
                        </div>
                    </div>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <!-- Add Device Modal -->
    <div class="modal fade" id="addDeviceModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content border-0 shadow">
                <div class="modal-header">
                    <h5 class="modal-title" data-en="Add Biometric Device" data-ar="إضافة جهاز بصمة">Add Biometric Device</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <div class="mb-3">
                            <label class="form-label" data-en="Device Name" data-ar="اسم الجهاز">Device Name</label>
                            <input type="text" name="device_name" class="form-control" required placeholder="e.g. Main Entrance">
                        </div>
                        <div class="row g-3 mb-3">
                            <div class="col-md-8">
                                <label class="form-label" data-en="IP Address" data-ar="عنوان IP">IP Address</label>
                                <input type="text" name="ip_address" class="form-control" required placeholder="192.168.1.201">
                            </div>
                            <div class="col-md-4">
                                <label class="form-label" data-en="Port" data-ar="المنفذ">Port</label>
                                <input type="number" name="port" class="form-control" value="4370" required>
                            </div>
                        </div>
                        <div class="mb-3">
                            <label class="form-label" data-en="IO Address" data-ar="عنوان IO">IO Address</label>
                            <input type="text" name="io_address" class="form-control" placeholder="Optional IO address">
                        </div>
                        <div class="mb-3">
                            <label class="form-label" data-en="Serial Number" data-ar="الرقم التسلسلي">Serial Number</label>
                            <input type="text" name="serial_number" class="form-control" placeholder="Device Serial Number">
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_biometric_device" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <?php elseif ($page === 'scale_devices'): ?>
    <div class="card border-0 shadow-sm rounded-4 overflow-hidden">
        <div class="card-header bg-white border-0 py-3 d-flex justify-content-between align-items-center">
            <h5 class="mb-0 fw-bold" data-en="POS Devices" data-ar="أجهزة نقاط البيع">POS Devices</h5>
            <button class="btn btn-primary rounded-3" data-bs-toggle="modal" data-bs-target="#addScaleDeviceModal">
                <i class="fas fa-plus me-1"></i> <span data-en="Add Device" data-ar="إضافة جهاز">Add Device</span>
            </button>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle mb-0">
                <thead class="bg-light">
                    <tr>
                        <th data-en="Device Name" data-ar="اسم الجهاز">Device Name</th>
                        <th data-en="Type" data-ar="النوع">Type</th>
                        <th data-en="Connection" data-ar="الاتصال">Connection</th>
                        <th data-en="Details" data-ar="التفاصيل">Details</th>
                        <th data-en="Status" data-ar="الحالة">Status</th>
                        <th class="text-end" data-en="Actions" data-ar="الإجراءات">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['scale_devices'] as $d): ?>
                    <tr>
                        <td>
                            <div class="fw-bold"><?= htmlspecialchars($d['device_name']) ?></div>
                        </td>
                        <td>
                            <span class="badge bg-info-subtle text-info text-capitalize"><?= $d['device_type'] ?></span>
                        </td>
                        <td>
                            <span class="badge bg-secondary-subtle text-secondary text-uppercase"><?= $d['connection_type'] ?></span>
                        </td>
                        <td class="small text-muted">
                            <?php if ($d['connection_type'] === 'network'): ?>
                                <?= htmlspecialchars((string)$d['ip_address']) ?>:<?= $d['port'] ?>
                            <?php elseif ($d['connection_type'] === 'serial'): ?>
                                Baud: <?= $d['baud_rate'] ?>
                            <?php else: ?>
                                USB Interface
                            <?php endif; ?>
                        </td>
                        <td>
                            <span class="badge bg-<?= $d['status'] === 'active' ? 'success' : 'danger' ?>-subtle text-<?= $d['status'] === 'active' ? 'success' : 'danger' ?> text-capitalize"><?= $d['status'] ?></span>
                        </td>
                        <td class="text-end">
                            <button class="btn btn-sm btn-light rounded-pill px-3" data-bs-toggle="modal" data-bs-target="#editScaleDeviceModal<?= $d['id'] ?>">
                                <i class="fas fa-edit me-1"></i> <span data-en="Edit" data-ar="تعديل">Edit</span>
                            </button>
                            <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                <input type="hidden" name="id" value="<?= $d['id'] ?>">
                                <button type="submit" name="delete_pos_device" class="btn btn-sm btn-outline-danger border-0 rounded-pill">
                                    <i class="fas fa-trash"></i>
                                </button>
                            </form>
                        </td>
                    </tr>

                    <!-- Edit Device Modal -->
                    <div class="modal fade" id="editScaleDeviceModal<?= $d['id'] ?>" tabindex="-1">
                        <div class="modal-dialog border-0">
                            <div class="modal-content shadow border-0 rounded-4">
                                <div class="modal-header border-0">
                                    <h5 class="modal-title fw-bold" data-en="Edit Device" data-ar="تعديل الجهاز">Edit Device</h5>
                                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                </div>
                                <form method="POST">
                                    <input type="hidden" name="id" value="<?= $d['id'] ?>">
                                    <div class="modal-body">
                                        <div class="mb-3">
                                            <label class="form-label" data-en="Device Name" data-ar="اسم الجهاز">Device Name</label>
                                            <input type="text" name="device_name" class="form-control" value="<?= htmlspecialchars($d['device_name']) ?>" required>
                                        </div>
                                        <div class="row g-3 mb-3">
                                            <div class="col-md-6">
                                                <label class="form-label" data-en="Device Type" data-ar="نوع الجهاز">Device Type</label>
                                                <select name="device_type" class="form-select">
                                                    <option value="scale" <?= $d['device_type'] === 'scale' ? 'selected' : '' ?>>Weight Scale</option>
                                                    <option value="printer" <?= $d['device_type'] === 'printer' ? 'selected' : '' ?>>Receipt Printer</option>
                                                    <option value="display" <?= $d['device_type'] === 'display' ? 'selected' : '' ?>>Customer Display</option>
                                                </select>
                                            </div>
                                            <div class="col-md-6">
                                                <label class="form-label" data-en="Connection Type" data-ar="نوع الاتصال">Connection Type</label>
                                                <select name="connection_type" class="form-select">
                                                    <option value="usb" <?= $d['connection_type'] === 'usb' ? 'selected' : '' ?>>USB</option>
                                                    <option value="network" <?= $d['connection_type'] === 'network' ? 'selected' : '' ?>>Network (TCP/IP)</option>
                                                    <option value="serial" <?= $d['connection_type'] === 'serial' ? 'selected' : '' ?>>Serial (RS232)</option>
                                                </select>
                                            </div>
                                        </div>
                                        <div class="row g-3 mb-3">
                                            <div class="col-md-8">
                                                <label class="form-label" data-en="IP Address" data-ar="عنوان IP">IP Address</label>
                                                <input type="text" name="ip_address" class="form-control" value="<?= htmlspecialchars((string)$d['ip_address']) ?>">
                                            </div>
                                            <div class="col-md-4">
                                                <label class="form-label" data-en="Port" data-ar="المنفذ">Port</label>
                                                <input type="number" name="port" class="form-control" value="<?= $d['port'] ?>">
                                            </div>
                                        </div>
                                        <div class="mb-3">
                                            <label class="form-label" data-en="Baud Rate" data-ar="معدل الباود">Baud Rate</label>
                                            <input type="number" name="baud_rate" class="form-control" value="<?= $d['baud_rate'] ?>">
                                        </div>
                                        <div class="mb-3">
                                            <label class="form-label" data-en="Status" data-ar="الحالة">Status</label>
                                            <select name="status" class="form-select">
                                                <option value="active" <?= $d['status'] === 'active' ? 'selected' : '' ?>>Active</option>
                                                <option value="inactive" <?= $d['status'] === 'inactive' ? 'selected' : '' ?>>Inactive</option>
                                            </select>
                                        </div>
                                    </div>
                                    <div class="modal-footer border-0">
                                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                        <button type="submit" name="edit_pos_device" class="btn btn-primary" data-en="Update" data-ar="تحديث">Update</button>
                                    </div>
                                </form>
                            </div>
                        </div>
                    </div>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <!-- Add Scale Device Modal -->
    <div class="modal fade" id="addScaleDeviceModal" tabindex="-1">
        <div class="modal-dialog border-0">
            <div class="modal-content shadow border-0 rounded-4">
                <div class="modal-header border-0">
                    <h5 class="modal-title fw-bold" data-en="Add POS Device" data-ar="إضافة جهاز">Add POS Device</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <div class="mb-3">
                            <label class="form-label" data-en="Device Name" data-ar="اسم الجهاز">Device Name</label>
                            <input type="text" name="device_name" class="form-control" required placeholder="e.g. Counter 1 Scale">
                        </div>
                        <div class="row g-3 mb-3">
                            <div class="col-md-6">
                                <label class="form-label" data-en="Device Type" data-ar="نوع الجهاز">Device Type</label>
                                <select name="device_type" class="form-select">
                                    <option value="scale">Weight Scale</option>
                                    <option value="printer">Receipt Printer</option>
                                    <option value="display">Customer Display</option>
                                </select>
                            </div>
                            <div class="col-md-6">
                                <label class="form-label" data-en="Connection Type" data-ar="نوع الاتصال">Connection Type</label>
                                <select name="connection_type" class="form-select">
                                    <option value="usb">USB</option>
                                    <option value="network">Network (TCP/IP)</option>
                                    <option value="serial">Serial (RS232)</option>
                                </select>
                            </div>
                        </div>
                        <div class="row g-3 mb-3">
                            <div class="col-md-8">
                                <label class="form-label" data-en="IP Address" data-ar="عنوان IP">IP Address</label>
                                <input type="text" name="ip_address" class="form-control" placeholder="192.168.1.50">
                            </div>
                            <div class="col-md-4">
                                <label class="form-label" data-en="Port" data-ar="المنفذ">Port</label>
                                <input type="number" name="port" class="form-control" placeholder="9100">
                            </div>
                        </div>
                        <div class="mb-3">
                            <label class="form-label" data-en="Baud Rate" data-ar="معدل الباود">Baud Rate</label>
                            <input type="number" name="baud_rate" class="form-control" placeholder="9600">
                        </div>
                    </div>
                    <div class="modal-footer border-0">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_pos_device" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <?php elseif ($page === 'my_profile'): ?>
    <div class="row">
        <div class="col-md-4">
            <div class="card p-4 text-center border-0 shadow-sm rounded-4">
                <h5 class="mb-4 fw-bold" data-en="Profile Picture" data-ar="صورة الملف الشخصي">Profile Picture</h5>
                <div class="mb-3">
                    <?php if (!empty($data['user']['profile_pic'])): ?>
                        <img src="<?= htmlspecialchars($data['user']['profile_pic']) ?>?v=<?= time() ?>" alt="Profile" class="rounded-circle shadow-sm" style="width: 150px; height: 150px; object-fit: cover; border: 5px solid #fff;">
                    <?php else: ?>
                        <div class="rounded-circle bg-light d-inline-flex align-items-center justify-content-center shadow-sm" style="width: 150px; height: 150px; border: 5px solid #fff;">
                            <i class="bi bi-person text-muted" style="font-size: 5rem;"></i>
                        </div>
                    <?php endif; ?>
                </div>
                <div class="mt-3">
                    <h6 class="fw-bold mb-0"><?= htmlspecialchars($data['user']['username']) ?></h6>
                    <p class="text-muted small"><?= htmlspecialchars($_SESSION['user_role_name'] ?? 'User') ?></p>
                </div>
            </div>
        </div>
        <div class="col-md-8">
            <div class="card p-4 border-0 shadow-sm rounded-4">
                <h5 class="mb-4 fw-bold" data-en="Edit Profile" data-ar="تعديل الملف الشخصي">Edit Profile</h5>
                <form method="POST" enctype="multipart/form-data">
                    <div class="form-grid-3">
                        <div class="col-md-6">
                            <label class="form-label fw-semibold" data-en="Username" data-ar="اسم المستخدم">Username</label>
                            <input type="text" name="username" class="form-control rounded-3" value="<?= htmlspecialchars($data['user']['username'] ?? '') ?>" required>
                        </div>
                        <div class="col-md-6">
                            <label class="form-label fw-semibold" data-en="Email" data-ar="البريد الإلكتروني">Email</label>
                            <input type="email" name="email" class="form-control rounded-3" value="<?= htmlspecialchars($data['user']['email'] ?? '') ?>">
                        </div>
                        <div class="col-md-6">
                            <label class="form-label fw-semibold" data-en="Phone" data-ar="الهاتف">Phone</label>
                            <input type="text" name="phone" class="form-control rounded-3" value="<?= htmlspecialchars($data['user']['phone'] ?? '') ?>">
                        </div>
                        <div class="col-md-6">
                            <label class="form-label fw-semibold" data-en="New Password" data-ar="كلمة مرور جديدة">New Password</label>
                            <input type="password" name="password" class="form-control rounded-3" placeholder="Leave blank to keep current">
                        </div>
                        <div class="col-md-6">
                            <label class="form-label fw-semibold" data-en="Change Profile Picture" data-ar="تغيير صورة الملف الشخصي">Change Profile Picture</label>
                            <input type="file" name="profile_pic" class="form-control rounded-3" accept="image/*">
                        </div>
                        <div class="col-md-12 mt-4">
                            <button type="submit" name="update_profile" class="btn btn-primary rounded-pill px-4">
                                <i class="bi bi-check-circle me-1"></i> <span data-en="Save Changes" data-ar="حفظ التغييرات">Save Changes</span>
                            </button>
                        </div>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <?php elseif ($page === "outlets" && ($_SESSION["user_role_name"] ?? "") === "Administrator"): ?>
        <?php require "outlets_html.php"; ?>
    <?php elseif ($page === 'copy_outlet_data'): require 'pages/copy_outlet_data_view.php'; ?><?php elseif ($page === 'settings'): ?>
    <div class="row justify-content-center">
        <div class="col-xl-10">
            <div class="card border-0 shadow-sm rounded-4">
                <div class="card-header bg-white py-3 border-bottom-0 d-flex justify-content-between align-items-center">
                    <div class="d-flex align-items-center gap-3">
                        <div class="rounded-circle bg-primary bg-opacity-10 p-3 text-primary">
                            <i class="bi bi-building-gear fs-4"></i>
                        </div>
                        <div>
                            <h5 class="m-0 fw-bold text-dark" data-en="Company Profile & Settings" data-ar="ملف الشركة والإعدادات">Company Profile & Settings</h5>
                            <p class="text-muted small mb-0" data-en="Manage your business identity and system preferences" data-ar="إدارة هوية عملك وتفضيلات النظام">Manage your business identity and system preferences</p>
                        </div>
                    </div>
                    <div>
                         <a href="index.php?page=copy_outlet_data" class="btn btn-outline-primary btn-sm">
                            <i class="bi bi-arrow-repeat me-1"></i> <span data-en="Sync Outlets" data-ar="مزامنة الفروع">Sync Outlets</span>
                        </a>
                    </div>
                </div>
                <div class="card-body p-4">
                    <?php
                        $licenseIdentity = LicenseService::getClientIdentity();
                        $licenseSourceLabels = [
                            'settings' => 'Saved in settings',
                            'environment' => 'Environment variable',
                            'derived' => 'Derived from app name',
                            'default' => 'Built-in fallback',
                        ];
                        $savedLicenseAppName = trim((string)($data['settings']['license_app_name'] ?? ''));
                        $savedLicenseAppSlug = trim((string)($data['settings']['license_app_slug'] ?? ''));
                        $licenseAppNameInput = $savedLicenseAppName;
                        $licenseAppSlugInput = $savedLicenseAppSlug;
                    ?>
                    <form method="POST" enctype="multipart/form-data">
                        
                        <!-- Company Details Section -->
                        <div class="mb-5">
                            <h6 class="fw-bold text-primary mb-3 border-bottom pb-2">
                                <i class="bi bi-info-circle me-2"></i><span data-en="Company Details" data-ar="تفاصيل الشركة">Company Details</span>
                            </h6>
                            <div class="row g-3">
                                <div class="col-md-6">
                                    <label class="form-label text-muted small fw-semibold" data-en="Company Name" data-ar="اسم الشركة">Company Name</label>
                                    <div class="input-group">
                                        <span class="input-group-text bg-light border-end-0"><i class="bi bi-building"></i></span>
                                        <input type="text" name="settings[company_name]" class="form-control border-start-0 ps-0" value="<?= htmlspecialchars($data['settings']['company_name'] ?? '') ?>" placeholder="e.g. Tech Solutions LLC">
                                    </div>
                                </div>
                                <div class="col-md-6">
                                    <label class="form-label text-muted small fw-semibold" data-en="CTR No (Commercial Registration)" data-ar="رقم السجل التجاري">CTR No (Commercial Registration)</label>
                                    <div class="input-group">
                                        <span class="input-group-text bg-light border-end-0"><i class="bi bi-file-text"></i></span>
                                        <input type="text" name="settings[ctr_no]" class="form-control border-start-0 ps-0" value="<?= htmlspecialchars($data['settings']['ctr_no'] ?? '') ?>" placeholder="e.g. 1234567">
                                    </div>
                                </div>
                                <div class="col-md-6">
                                    <label class="form-label text-muted small fw-semibold" data-en="VAT Number" data-ar="الرقم الضريبي">VAT Number</label>
                                    <div class="input-group">
                                        <span class="input-group-text bg-light border-end-0"><i class="bi bi-receipt"></i></span>
                                        <input type="text" name="settings[vat_number]" class="form-control border-start-0 ps-0" value="<?= htmlspecialchars($data['settings']['vat_number'] ?? '') ?>" placeholder="e.g. OM123456789">
                                    </div>
                                </div>
                            </div>
                        </div>

                        <!-- Contact Information Section -->
                        <div class="mb-5">
                            <h6 class="fw-bold text-primary mb-3 border-bottom pb-2">
                                <i class="bi bi-telephone me-2"></i><span data-en="Contact Information" data-ar="معلومات الاتصال">Contact Information</span>
                            </h6>
                            <div class="row g-3">
                                <div class="col-md-6">
                                    <label class="form-label text-muted small fw-semibold" data-en="Phone Number" data-ar="رقم الهاتف">Phone Number</label>
                                    <div class="input-group">
                                        <span class="input-group-text bg-light border-end-0"><i class="bi bi-phone"></i></span>
                                        <input type="text" name="settings[company_phone]" class="form-control border-start-0 ps-0" value="<?= htmlspecialchars($data['settings']['company_phone'] ?? '') ?>" placeholder="+968 9999 9999">
                                    </div>
                                </div>
                                <div class="col-md-6">
                                    <label class="form-label text-muted small fw-semibold" data-en="Email Address" data-ar="البريد الإلكتروني">Email Address</label>
                                    <div class="input-group">
                                        <span class="input-group-text bg-light border-end-0"><i class="bi bi-envelope"></i></span>
                                        <input type="email" name="settings[company_email]" class="form-control border-start-0 ps-0" value="<?= htmlspecialchars($data['settings']['company_email'] ?? '') ?>" placeholder="info@example.com">
                                    </div>
                                </div>
                                <div class="col-md-12">
                                    <label class="form-label text-muted small fw-semibold" data-en="Physical Address" data-ar="العنوان الفعلي">Physical Address</label>
                                    <div class="input-group">
                                        <span class="input-group-text bg-light border-end-0"><i class="bi bi-geo-alt"></i></span>
                                        <textarea name="settings[company_address]" class="form-control border-start-0 ps-0" rows="2" placeholder="Street, Building, City..."><?= htmlspecialchars($data['settings']['company_address'] ?? '') ?></textarea>
                                    </div>
                                </div>
                            </div>
                        </div>

                        <!-- System Configuration Section -->
                        <div class="mb-5">
                            <h6 class="fw-bold text-primary mb-3 border-bottom pb-2">
                                <i class="bi bi-sliders me-2"></i><span data-en="System Configuration" data-ar="تكوين النظام">System Configuration</span>
                            </h6>
                            <div class="row g-3">
                                <div class="col-md-6">
                                    <label class="form-label text-muted small fw-semibold" data-en="System Timezone" data-ar="المنطقة الزمنية للنظام">System Timezone</label>
                                    <select name="settings[timezone]" class="form-select">
                                        <?php
                                        $tz_identifiers = DateTimeZone::listIdentifiers();
                                        $current_tz = $data['settings']['timezone'] ?? date_default_timezone_get();
                                        foreach ($tz_identifiers as $tz) {
                                            $selected = ($tz === $current_tz) ? 'selected' : '';
                                            echo "<option value=\"\"$tz\" $selected>$tz</option>";
                                        }
                                        ?>
                                    </select>
                                </div>
                                <div class="col-md-6">
                                    <label class="form-label text-muted small fw-semibold" data-en="Stock Policy" data-ar="سياسة المخزون">Stock Policy</label>
                                    <select name="settings[allow_zero_stock_sell]" class="form-select">
                                        <option value="0" <?= ($data['settings']['allow_zero_stock_sell'] ?? '1') === '0' ? 'selected' : '' ?> data-en="Prevent selling out of stock" data-ar="منع البيع عند نفاذ المخزون">Prevent selling out of stock</option>
                                        <option value="1" <?= ($data['settings']['allow_zero_stock_sell'] ?? '1') === '1' ? 'selected' : '' ?> data-en="Allow selling out of stock" data-ar="السماح بالبيع عند نفاذ المخزون">Allow selling out of stock</option>
                                    </select>
                                </div>
                                <div class="col-md-4">
                                    <label class="form-label text-muted small fw-semibold" data-en="Scale Barcode Mode" data-ar="وضع باركود الميزان">Scale Barcode Mode</label>
                                    <select name="settings[weight_barcode_mode]" class="form-select">
                                        <option value="weight" <?= ($data['settings']['weight_barcode_mode'] ?? 'weight') === 'weight' ? 'selected' : '' ?> data-en="Use embedded weight" data-ar="استخدام الوزن">Use embedded weight</option>
                                        <option value="price" <?= ($data['settings']['weight_barcode_mode'] ?? '') === 'price' ? 'selected' : '' ?> data-en="Use embedded price" data-ar="استخدام السعر">Use embedded price</option>
                                    </select>
                                </div>
                                <div class="col-md-4">
                                    <label class="form-label text-muted small fw-semibold" data-en="Scale Prefix From" data-ar="بادئة الميزان من">Scale Prefix From</label>
                                    <input type="number" min="20" max="29" name="settings[weight_barcode_prefix_start]" class="form-control" value="<?= htmlspecialchars($data['settings']['weight_barcode_prefix_start'] ?? '20') ?>">
                                </div>
                                <div class="col-md-4">
                                    <label class="form-label text-muted small fw-semibold" data-en="Scale Prefix To" data-ar="بادئة الميزان إلى">Scale Prefix To</label>
                                    <input type="number" min="20" max="29" name="settings[weight_barcode_prefix_end]" class="form-control" value="<?= htmlspecialchars($data['settings']['weight_barcode_prefix_end'] ?? '29') ?>">
                                </div>
                                <div class="col-12">
                                    <div class="form-text" data-en="13-digit scale barcode format: 2-digit prefix + 5-digit item code + 5-digit value + 1 check digit. Full 13-digit scale barcodes are reserved and cannot be saved on items or imported." data-ar="صيغة باركود الميزان 13 رقمًا: بادئة من رقمين + كود صنف من 5 أرقام + قيمة من 5 أرقام + رقم تحقق. الباركود الكامل 13 رقمًا محجوز ولا يمكن حفظه أو استيراده كصنف.">13-digit scale barcode format: 2-digit prefix + 5-digit item code + 5-digit value + 1 check digit. Full 13-digit scale barcodes are reserved and cannot be saved on items or imported.</div>
                                </div>
                            </div>
                        </div>

                        <!-- License Identity Section -->
                        <div class="mb-5">
                            <div class="d-flex justify-content-between align-items-start flex-wrap gap-3 mb-3 border-bottom pb-2">
                                <h6 class="fw-bold text-primary m-0">
                                    <i class="bi bi-shield-check me-2"></i><span data-en="License App Identity" data-ar="هوية ترخيص التطبيق">License App Identity</span>
                                </h6>
                                <span class="badge rounded-pill text-bg-light border">
                                    <span data-en="Name source" data-ar="مصدر الاسم">Name source</span>: <?= htmlspecialchars($licenseSourceLabels[$licenseIdentity['app_name_source']] ?? 'Built-in fallback') ?>
                                    ·
                                    <span data-en="Slug source" data-ar="مصدر المعرّف">Slug source</span>: <?= htmlspecialchars($licenseSourceLabels[$licenseIdentity['app_slug_source']] ?? 'Built-in fallback') ?>
                                </span>
                            </div>
                            <div class="alert alert-info border-0 shadow-sm small mb-3">
                                <strong data-en="Use one stable identity per product." data-ar="استخدم هوية ثابتة لكل منتج.">Use one stable identity per product.</strong>
                                <span data-en="This is the product identity your central license manager sees. Change the slug only when you intentionally rename or split a product." data-ar="هذه هي هوية المنتج التي يراها مدير التراخيص المركزي. غيّر المعرّف فقط عندما تقصد إعادة تسمية المنتج أو تقسيمه.">This is the product identity your central license manager sees. Change the slug only when you intentionally rename or split a product.</span>
                            </div>
                            <div class="row g-3">
                                <div class="col-md-6">
                                    <label class="form-label text-muted small fw-semibold" data-en="App Name for Licensing" data-ar="اسم التطبيق للترخيص">App Name for Licensing</label>
                                    <div class="input-group">
                                        <span class="input-group-text bg-light border-end-0"><i class="bi bi-window"></i></span>
                                        <input type="text" id="license-app-name" name="settings[license_app_name]" class="form-control border-start-0 ps-0" value="<?= htmlspecialchars($licenseAppNameInput) ?>" placeholder="<?= htmlspecialchars((string)$licenseIdentity['app_name']) ?>">
                                    </div>
                                    <div class="form-text" data-en="Leave blank only if you want to fall back to environment/default values." data-ar="اتركه فارغًا فقط إذا كنت تريد الرجوع إلى قيم البيئة أو القيم الافتراضية.">Leave blank only if you want to fall back to environment/default values.</div>
                                </div>
                                <div class="col-md-6">
                                    <label class="form-label text-muted small fw-semibold" data-en="Stable App Slug" data-ar="المعرّف الثابت للتطبيق">Stable App Slug</label>
                                    <div class="input-group">
                                        <span class="input-group-text bg-light border-end-0"><i class="bi bi-tag"></i></span>
                                        <input type="text" id="license-app-slug" name="settings[license_app_slug]" data-explicit="<?= $savedLicenseAppSlug !== '' ? '1' : '0' ?>" class="form-control border-start-0 ps-0" value="<?= htmlspecialchars($licenseAppSlugInput) ?>" placeholder="<?= htmlspecialchars((string)$licenseIdentity['app_slug']) ?>">
                                        <button type="button" class="btn btn-outline-secondary" id="suggest-license-slug" data-en="Suggest" data-ar="اقتراح">Suggest</button>
                                    </div>
                                    <div class="form-text" data-en="Use one slug per product, not per customer or installation." data-ar="استخدم معرّفًا واحدًا لكل منتج، وليس لكل عميل أو تثبيت.">Use one slug per product, not per customer or installation.</div>
                                </div>
                                <div class="col-12">
                                    <div class="form-text">
                                        <span data-en="Current effective identity:" data-ar="هوية التطبيق الفعالة حاليًا:">Current effective identity:</span>
                                        <code><?= htmlspecialchars((string)$licenseIdentity['app_name']) ?></code>
                                        ·
                                        <code><?= htmlspecialchars((string)$licenseIdentity['app_slug']) ?></code>
                                    </div>
                                </div>
                            </div>
                        </div>

                        <!-- Visual Identity Section -->
                        <div class="mb-5">
                            <h6 class="fw-bold text-primary mb-3 border-bottom pb-2">
                                <i class="bi bi-palette me-2"></i><span data-en="Visual Identity" data-ar="الهوية البصرية">Visual Identity</span>
                            </h6>
                            <div class="row g-4">
                                <div class="col-md-4">
                                    <div class="card h-100 border-dashed bg-light text-center p-3">
                                        <label class="form-label fw-semibold mb-2" data-en="Company Logo" data-ar="شعار الشركة">Company Logo</label>
                                        <div class="mb-3 d-flex justify-content-center align-items-center" style="height: 100px;">
                                            <?php if (!empty($data['settings']['company_logo'])): ?>
                                                <img src="<?= htmlspecialchars($data['settings']['company_logo']) ?>?v=<?= time() ?>" alt="Logo" class="img-fluid" style="max-height: 80px;">
                                            <?php else:
                                            ?>
                                                <i class="bi bi-image text-muted fs-1"></i>
                                            <?php endif; ?>
                                        </div>
                                        <input type="file" name="company_logo" class="form-control form-control-sm" accept="image/*">
                                    </div>
                                </div>
                                <div class="col-md-4">
                                    <div class="card h-100 border-dashed bg-light text-center p-3">
                                        <label class="form-label fw-semibold mb-2" data-en="Website Favicon" data-ar="أيقونة الموقع">Website Favicon</label>
                                        <div class="mb-3 d-flex justify-content-center align-items-center" style="height: 100px;">
                                            <?php if (!empty($data['settings']['favicon'])): ?>
                                                <img src="<?= htmlspecialchars($data['settings']['favicon']) ?>?v=<?= time() ?>" alt="Favicon" class="img-fluid" style="max-height: 32px;">
                                            <?php else:
                                            ?>
                                                <i class="bi bi-globe text-muted fs-1"></i>
                                            <?php endif; ?>
                                        </div>
                                        <input type="file" name="favicon" class="form-control form-control-sm" accept="image/*">
                                    </div>
                                </div>
                                <div class="col-md-4">
                                    <div class="card h-100 border-dashed bg-light text-center p-3">
                                        <label class="form-label fw-semibold mb-2" data-en="Manager Signature" data-ar="توقيع المدير">Manager Signature</label>
                                        <div class="mb-3 d-flex justify-content-center align-items-center" style="height: 100px;">
                                            <?php if (!empty($data['settings']['manager_signature'])): ?>
                                                <img src="<?= htmlspecialchars($data['settings']['manager_signature']) ?>?v=<?= time() ?>" alt="Signature" class="img-fluid" style="max-height: 80px;">
                                            <?php else:
                                            ?>
                                                <i class="bi bi-pen text-muted fs-1"></i>
                                            <?php endif; ?>
                                        </div>
                                        <input type="file" name="manager_signature" class="form-control form-control-sm" accept="image/*">
                                    </div>
                                </div>
                            </div>
                        </div>

                        <!-- Loyalty Configuration Section -->
                        <div class="mb-5">
                            <h6 class="fw-bold text-primary mb-3 border-bottom pb-2">
                                <i class="bi bi-award me-2"></i><span data-en="Loyalty Program" data-ar="برنامج الولاء">Loyalty Program</span>
                            </h6>
                            <div class="row g-3">
                                <div class="col-md-4">
                                    <label class="form-label text-muted small fw-semibold" data-en="Loyalty Status" data-ar="حالة الولاء">Loyalty Status</label>
                                    <select name="settings[loyalty_enabled]" class="form-select">
                                        <option value="0" <?= ($data['settings']['loyalty_enabled'] ?? '0') === '0' ? 'selected' : '' ?> data-en="Disabled" data-ar="معطل">Disabled</option>
                                        <option value="1" <?= ($data['settings']['loyalty_enabled'] ?? '0') === '1' ? 'selected' : '' ?> data-en="Active" data-ar="نشط">Active</option>
                                    </select>
                                </div>
                                <div class="col-md-4">
                                    <label class="form-label text-muted small fw-semibold" data-en="Earning Rule (Points/1 OMR)" data-ar="قاعدة الكسب (نقاط/1 ريال)">Earning Rule (Points/1 OMR)</label>
                                    <div class="input-group">
                                        <span class="input-group-text bg-light border-end-0"><i class="bi bi-arrow-up-circle"></i></span>
                                        <input type="number" step="0.01" name="settings[loyalty_points_per_unit]" class="form-control border-start-0 ps-0" value="<?= htmlspecialchars($data['settings']['loyalty_points_per_unit'] ?? '1') ?>">
                                    </div>
                                </div>
                                <div class="col-md-4">
                                    <label class="form-label text-muted small fw-semibold" data-en="Redemption Rule (Points/1 OMR)" data-ar="قاعدة الاسترداد (نقاط/1 ريال)">Redemption Rule (Points/1 OMR)</label>
                                    <div class="input-group">
                                        <span class="input-group-text bg-light border-end-0"><i class="bi bi-arrow-down-circle"></i></span>
                                        <input type="number" step="0.01" name="settings[loyalty_redeem_points_per_unit]" class="form-control border-start-0 ps-0" value="<?= htmlspecialchars($data['settings']['loyalty_redeem_points_per_unit'] ?? '100') ?>">
                                    </div>
                                </div>
                            </div>
                        </div>

                        <div class="d-flex justify-content-end pt-3">
                            <button type="submit" name="update_settings" class="btn btn-primary btn-lg rounded-pill px-5 shadow-sm">
                                <i class="bi bi-check-lg me-2"></i> <span data-en="Save All Changes" data-ar="حفظ جميع التغييرات">Save All Changes</span>
                            </button>
                        </div>
                    </form>
                    <script>
                        document.addEventListener('DOMContentLoaded', function () {
                            var nameInput = document.getElementById('license-app-name');
                            var slugInput = document.getElementById('license-app-slug');
                            var suggestButton = document.getElementById('suggest-license-slug');
                            if (!nameInput || !slugInput || !suggestButton) {
                                return;
                            }

                            var slugWasExplicit = slugInput.dataset.explicit === '1';
                            var slugify = function (value) {
                                return String(value || '')
                                    .toLowerCase()
                                    .trim()
                                    .replace(/[^a-z0-9]+/g, '-')
                                    .replace(/^-+|-+$/g, '');
                            };

                            nameInput.addEventListener('input', function () {
                                if (!slugWasExplicit || slugInput.value.trim() === '') {
                                    slugInput.value = slugify(nameInput.value);
                                }
                            });

                            slugInput.addEventListener('input', function () {
                                slugWasExplicit = slugInput.value.trim() !== '';
                                slugInput.dataset.explicit = slugWasExplicit ? '1' : '0';
                            });

                            suggestButton.addEventListener('click', function () {
                                slugInput.value = slugify(nameInput.value);
                                slugWasExplicit = slugInput.value.trim() !== '';
                                slugInput.dataset.explicit = slugWasExplicit ? '1' : '0';
                                slugInput.focus();
                            });
                        });
                    </script>
                </div>
            </div>
        </div>
    </div>

    <?php elseif ($page === 'role_groups'): ?>
    <div class="card border-0 shadow-sm rounded-4 overflow-hidden">
        <div class="card-header bg-white py-3 d-flex justify-content-between align-items-center border-0">
            <div>
                <h5 class="m-0 fw-bold text-primary" data-en="Role Groups" data-ar="مجموعات الأدوار">Role Groups</h5>
                <p class="text-muted small mb-0" data-en="Manage access levels and permissions" data-ar="إدارة مستويات الوصول والصلاحيات">Manage access levels and permissions</p>
            </div>
            <button class="btn btn-primary rounded-pill px-4" data-bs-toggle="modal" data-bs-target="#addRoleGroupModal">
                <i class="bi bi-shield-plus me-1"></i> <span data-en="Create New Group" data-ar="إنشاء مجموعة جديدة">Create New Group</span>
            </button>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle mb-0">
                <thead class="bg-light">
                    <tr>
                        <th class="ps-4" data-en="Group Name" data-ar="اسم المجموعة">Group Name</th>
                        <th data-en="Created Date" data-ar="تاريخ الإنشاء">Created Date</th>
                        <th data-en="Status" data-ar="الحالة">Status</th>
                        <th data-en="Actions" data-ar="الإجراءات" class="text-end pe-4">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['role_groups'] as $group): ?>
                    <tr>
                        <td class="ps-4">
                            <div class="d-flex align-items-center">
                                <div class="rounded-circle bg-primary bg-opacity-10 p-2 me-3 text-primary">
                                    <i class="bi bi-shield-check"></i>
                                </div>
                                <span class="fw-semibold text-dark"><?= htmlspecialchars((string)$group['name']) ?></span>
                            </div>
                        </td>
                        <td><span class="text-muted small"><?= date('M d, Y', strtotime((string)$group['created_at'])) ?></span></td>
                        <td><span class="badge rounded-pill bg-success bg-opacity-10 text-success px-3">Active</span></td>
                        <td class="text-end pe-4">
                            <div class="dropdown">
                                <button class="btn btn-light btn-sm rounded-circle" type="button" data-bs-toggle="dropdown">
                                    <i class="bi bi-three-dots-vertical"></i>
                                </button>
                                <ul class="dropdown-menu dropdown-menu-end shadow-sm border-0">
                                    <?php if (can('users_edit')): ?>
                                    <li><a class="dropdown-item" href="#" data-bs-toggle="modal" data-bs-target="#editRoleGroupModal<?= $group['id'] ?>"><i class="bi bi-pencil me-2 text-primary"></i> Edit Permissions</a></li>
                                    <?php endif; ?>
                                    <?php if (can('users_delete')): ?>
                                    <li><hr class="dropdown-divider"></li>
                                    <li>
                                        <form method="POST" onsubmit="return confirm('Delete this role group? This cannot be undone.')">
                                            <input type="hidden" name="id" value="<?= $group['id'] ?>">
                                            <button type="submit" name="delete_role_group" class="dropdown-item text-danger"><i class="bi bi-trash me-2"></i> Delete Group</button>
                                        </form>
                                    </li>
                                    <?php endif; ?>
                                </ul>
                            </div>

                            <!-- Edit Role Group Modal -->
                            <div class="modal fade" id="editRoleGroupModal<?= $group['id'] ?>" tabindex="-1">
                                <div class="modal-dialog modal-lg">
                                    <div class="modal-content border-0 shadow text-start">
                                        <div class="modal-header">
                                            <h5 class="modal-title fw-bold" data-en="Edit Role Group" data-ar="تعديل مجموعة الأدوار">Edit Role Group</h5>
                                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                        </div>
                                        <form method="POST">
                                            <input type="hidden" name="id" value="<?= $group['id'] ?>">
                                            <div class="modal-body">
                                                <div class="mb-3">
                                                    <label class="form-label fw-semibold" data-en="Group Name" data-ar="اسم المجموعة">Group Name</label>
                                                    <input type="text" name="name" class="form-control" value="<?= htmlspecialchars($group['name']) ?>" required>
                                                </div>
                                                <div class="mb-3">
                                                    <div class="d-flex justify-content-between align-items-center mb-2">
                                                        <label class="form-label fw-semibold mb-0" data-en="Permissions" data-ar="الصلاحيات">Permissions</label>
                                                        <div class="d-flex gap-2">
                                                            <button type="button" class="btn btn-xs btn-outline-primary py-0 px-2 small select-all-btn" data-modal="#editRoleGroupModal<?= $group['id'] ?>">Select All</button>
                                                            <button type="button" class="btn btn-xs btn-outline-secondary py-0 px-2 small deselect-all-btn" data-modal="#editRoleGroupModal<?= $group['id'] ?>">Deselect All</button>
                                                        </div>
                                                    </div>
                                                    <div class="mb-3 p-2 bg-light rounded d-flex justify-content-between align-items-center flex-wrap gap-2">
                                                        <span class="small fw-bold me-2">Global Actions:</span>
                                                        <div class="d-flex gap-3">
                                                            <div class="form-check">
                                                                <input class="form-check-input select-all-action" type="checkbox" data-action="view" id="selectAllView<?= $group['id'] ?>">
                                                                <label class="form-check-label small" for="selectAllView<?= $group['id'] ?>">View</label>
                                                            </div>
                                                            <div class="form-check">
                                                                <input class="form-check-input select-all-action" type="checkbox" data-action="add" id="selectAllAdd<?= $group['id'] ?>">
                                                                <label class="form-check-label small" for="selectAllAdd<?= $group['id'] ?>">Add</label>
                                                            </div>
                                                            <div class="form-check">
                                                                <input class="form-check-input select-all-action" type="checkbox" data-action="edit" id="selectAllEdit<?= $group['id'] ?>">
                                                                <label class="form-check-label small" for="selectAllEdit<?= $group['id'] ?>" data-en="Edit" data-ar="تعديل">Edit</label>
                                                            </div>
                                                            <div class="form-check">
                                                                <input class="form-check-input select-all-action" type="checkbox" data-action="delete" id="selectAllDelete<?= $group['id'] ?>">
                                                                <label class="form-check-label small" for="selectAllDelete<?= $group['id'] ?>" data-en="Delete" data-ar="حذف">Delete</label>
                                                            </div>
                                                        </div>
                                                    </div>
                                                    <div class="row overflow-auto pe-2" style="max-height: 500px;">
                                                        <?php 
                                                        $stmtP = db()->prepare("SELECT permission FROM role_permissions WHERE role_id = ?");
                                                        $stmtP->execute([$group['id']]);
                                                        $perms = $stmtP->fetchAll(PDO::FETCH_COLUMN);
                                                        foreach ($permission_groups as $group_name => $modules): ?>
                                                        <div class="permission-group-container col-12 mb-4">
                                                            <div class="mt-3 mb-2 bg-secondary bg-opacity-10 p-2 d-flex justify-content-between align-items-center rounded border-start border-primary border-3">
                                                                <span class="fw-bold text-uppercase small text-primary"><?= $group_name ?></span>
                                                                <div class="form-check mb-0">
                                                                    <input class="form-check-input select-all-group" type="checkbox" id="group_<?= $group['id'] ?>_<?= strtolower(str_replace(' ', '_', $group_name)) ?>">
                                                                    <label class="form-check-label small fw-bold" for="group_<?= $group['id'] ?>_<?= strtolower(str_replace(' ', '_', $group_name)) ?>">Group All</label>
                                                                </div>
                                                            </div>
                                                            <div class="row g-3">
                                                                <?php foreach ($modules as $m => $label): ?>
                                                                <div class="col-md-6 mb-2 border-bottom pb-2 module-row">
                                                                    <div class="small fw-bold mb-2 text-dark border-start border-2 ps-2 border-info d-flex justify-content-between align-items-center">
                                                                        <span><?= $label ?></span>
                                                                        <div class="form-check mb-0">
                                                                            <input class="form-check-input select-all-row" type="checkbox" id="row_all_<?= $group['id'] ?>_<?= $m ?>">
                                                                            <label class="form-check-label smaller text-muted mb-0 ms-1" style="font-size: 0.7rem;" for="row_all_<?= $group['id'] ?>_<?= $m ?>">Select All</label>
                                                                        </div>
                                                                    </div>
                                                                    <div class="d-flex gap-3 flex-wrap ps-2">
                                                                        <?php foreach (['view', 'add', 'edit', 'delete'] as $a): 
                                                                            $p = $m . '_' . $a;
                                                                        ?>
                                                                        <div class="form-check">
                                                                            <input class="form-check-input perm-check" type="checkbox" name="permissions[]" value="<?= $p ?>" data-action="<?= $a ?>" id="perm_<?= $group['id'] ?>_<?= $p ?>" <?= in_array($p, (array)$perms) ? 'checked' : '' ?>>
                                                                            <label class="form-check-label small" for="perm_<?= $group['id'] ?>_<?= $p ?>"><?= ucfirst($a) ?></label>
                                                                        </div>
                                                                        <?php endforeach; ?>
                                                                    </div>
                                                                </div>
                                                                <?php endforeach; ?>
                                                            </div>
                                                        </div>
                                                        <?php endforeach; ?>
                                                    </div>
                                                </div>
                                            </div>
                                            <div class="modal-footer">
                                                <button type="button" class="btn btn-light rounded-pill px-3" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                                <button type="submit" name="edit_role_group" class="btn btn-primary rounded-pill px-4" data-en="Update" data-ar="تحديث">Update</button>
                                            </div>
                                        </form>
                                    </div>
                                </div>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>
    <script>
    $(document).ready(function() {
        // Select All by Action (View, Add, Edit, Delete)
        $('.select-all-action').on('change', function() {
            const action = $(this).data('action');
            const checked = $(this).is(':checked');
            const modal = $(this).closest('.modal');
            modal.find('.perm-check[data-action="' + action + '"]').prop('checked', checked);
        });

        // Select All by Row
        $('.select-all-row').on('change', function() {
            const checked = $(this).is(':checked');
            $(this).closest('.module-row').find('.perm-check').prop('checked', checked);
        });

        // Select All by Group
        $('.select-all-group').on('change', function() {
            const checked = $(this).is(':checked');
            $(this).closest('.permission-group-container').find('.perm-check, .select-all-row').prop('checked', checked);
        });

        // Select All Button
        $('.select-all-btn').on('click', function() {
            const modal = $($(this).data('modal'));
            modal.find('.perm-check, .select-all-action, .select-all-group, .select-all-row').prop('checked', true);
        });

        // Deselect All Button
        $('.deselect-all-btn').on('click', function() {
            const modal = $($(this).data('modal'));
            modal.find('.perm-check, .select-all-action, .select-all-group, .select-all-row').prop('checked', false);
        });
    });
    </script>
<?php elseif ($page === 'customer_display_settings'): ?>
    <div class="card p-4">
        <h5 class="mb-4" data-en="Customer Display Settings" data-ar="إعدادات شاشة العميل">Customer Display Settings</h5>
        <form method="POST" enctype="multipart/form-data">
            
            <div class="form-grid-3">
                <div class="col-md-12">
                    <h6 class="text-muted border-bottom pb-2" data-en="Greeting Message" data-ar="رسالة الترحيب">Greeting Message</h6>
                </div>
                <div class="col-md-6">
                    <label class="form-label" data-en="Title" data-ar="العنوان">Title</label>
                    <input type="text" name="settings[customer_display_greeting_title]" class="form-control" value="<?= htmlspecialchars($data['settings']['customer_display_greeting_title'] ?? 'Welcome') ?>">
                </div>
                <div class="col-md-6">
                    <label class="form-label" data-en="Subtitle" data-ar="العنوان الفرعي">Subtitle</label>
                    <input type="text" name="settings[customer_display_greeting_text]" class="form-control" value="<?= htmlspecialchars($data['settings']['customer_display_greeting_text'] ?? 'We are ready to serve you.') ?>">
                </div>

                <div class="col-md-12 mt-4">
                    <h6 class="text-muted border-bottom pb-2" data-en="Slideshow Images" data-ar="صور العرض">Slideshow Images</h6>
                    <p class="text-muted small">Upload images for the customer display slideshow (1920x1080 recommended).</p>
                </div>

                <div class="col-md-4">
                    <label class="form-label">Slide 1</label>
                    <input type="file" name="display_slide_1" class="form-control" accept="image/*">
                    <?php if (!empty($data['settings']['display_slide_1'])): ?>
                    <div class="mt-2 position-relative">
                        <img src="<?= htmlspecialchars($data['settings']['display_slide_1']) ?>?v=<?= time() ?>" alt="Slide 1" class="img-thumbnail" style="max-height: 120px;">
                    </div>
                    <?php endif; ?>
                </div>

                <div class="col-md-4">
                    <label class="form-label">Slide 2</label>
                    <input type="file" name="display_slide_2" class="form-control" accept="image/*">
                    <?php if (!empty($data['settings']['display_slide_2'])): ?>
                    <div class="mt-2 position-relative">
                        <img src="<?= htmlspecialchars($data['settings']['display_slide_2']) ?>?v=<?= time() ?>" alt="Slide 2" class="img-thumbnail" style="max-height: 120px;">
                    </div>
                    <?php endif; ?>
                </div>

                <div class="col-md-4">
                    <label class="form-label">Slide 3</label>
                    <input type="file" name="display_slide_3" class="form-control" accept="image/*">
                    <?php if (!empty($data['settings']['display_slide_3'])): ?>
                    <div class="mt-2 position-relative">
                        <img src="<?= htmlspecialchars($data['settings']['display_slide_3']) ?>?v=<?= time() ?>" alt="Slide 3" class="img-thumbnail" style="max-height: 120px;">
                    </div>
                    <?php endif; ?>
                </div>

                <div class="col-md-12 mt-4">
                    <button type="submit" name="update_settings" class="btn btn-primary">
                        <i class="bi bi-save"></i> <span data-en="Save Changes" data-ar="حفظ التغييرات">Save Changes</span>
                    </button>
                </div>
            </div>
        </form>
    </div>

    <?php elseif ($page === 'backups'): ?>
    <div class="row g-4">
        <div class="col-md-4">
            <div class="card border-0 shadow-sm mb-4">
                <div class="card-header bg-white py-3 border-0">
                    <h5 class="card-title mb-0" data-en="Backup Settings" data-ar="إعدادات النسخ الاحتياطي">Backup Settings</h5>
                </div>
                <div class="card-body">
                    <form method="POST">
                        <div class="mb-3">
                            <label class="form-label small fw-semibold" data-en="Keep Last N Backups" data-ar="الاحتفاظ بآخر N نسخ">Keep Last N Backups</label>
                            <input type="number" name="backup_limit" class="form-control" value="<?= htmlspecialchars($data['backup_settings']['backup_limit'] ?? '5') ?>" min="1" max="50">
                        </div>
                        <div class="mb-3">
                            <label class="form-label small fw-semibold" data-en="Auto Backup Time" data-ar="وقت النسخ التلقائي">Auto Backup Time</label>
                            <input type="time" name="backup_time" class="form-control" value="<?= htmlspecialchars($data['backup_settings']['backup_time'] ?? '00:00') ?>">
                        </div>
                        <div class="mb-4">
                            <div class="form-check form-switch">
                                <input class="form-check-input" type="checkbox" name="backup_auto_enabled" value="1" id="autoBackupSwitch" <?= ($data['backup_settings']['backup_auto_enabled'] ?? '0') === '1' ? 'checked' : '' ?>>
                                <label class="form-check-label small fw-semibold" for="autoBackupSwitch" data-en="Enable Automated Backups" data-ar="تفعيل النسخ الاحتياطي التلقائي">Enable Automated Backups</label>
                            </div>
                            <small class="text-muted" data-en="Requires a cron job running cron_backup.php every minute to respect the scheduled time." data-ar="يتطلب تعيين مهمة مجدولة (cron) لتشغيل cron_backup.php كل دقيقة للالتزام بالوقت المحدد.">Requires a cron job running cron_backup.php every minute to respect the scheduled time.</small>
                        </div>
                        <button type="submit" name="save_backup_settings" class="btn btn-primary w-100" data-en="Save Settings" data-ar="حفظ الإعدادات">Save Settings</button>
                    </form>
                </div>
            </div>

            <div class="card border-0 shadow-sm">
                <div class="card-body text-center py-4">
                    <div class="bg-primary bg-opacity-10 rounded-circle d-inline-flex align-items-center justify-content-center mb-3" style="width: 60px; height: 60px;">
                        <i class="bi bi-cloud-upload text-primary fs-3"></i>
                    </div>
                    <h5 data-en="Manual Backup" data-ar="نسخ يدوي">Manual Backup</h5>
                    <p class="text-muted small" data-en="Create a database backup immediately." data-ar="إنشاء نسخة احتياطية من قاعدة البيانات فوراً.">Create a database backup immediately.</p>
                    <form method="POST">
                        <button type="submit" name="create_backup" class="btn btn-outline-primary" data-en="Backup Now" data-ar="نسخ الآن">Backup Now</button>
                    </form>
                </div>
            </div>
        </div>

        <div class="col-md-8">
            <div class="card border-0 shadow-sm">
                <div class="card-header bg-white py-3 border-0 d-flex justify-content-between align-items-center">
                    <h5 class="card-title mb-0" data-en="Available Backups" data-ar="النسخ المتاحة">Available Backups</h5>
                </div>
                <div class="card-body p-0">
                    <div class="table-responsive">
                        <table class="table table-hover align-middle mb-0">
                            <thead class="bg-light">
                                <tr>
                                    <th class="ps-4" data-en="Filename" data-ar="اسم الملف">Filename</th>
                                    <th data-en="Size" data-ar="الحجم">Size</th>
                                    <th data-en="Date" data-ar="التاريخ">Date</th>
                                    <th class="text-end pe-4" data-en="Actions" data-ar="الإجراءات">Actions</th>
                                </tr>
                            </thead>
                            <tbody>
                                <?php if (empty($data['backups'])): ?>
                                <tr>
                                    <td colspan="4" class="text-center py-4 text-muted" data-en="No backups found." data-ar="لا توجد نسخ احتياطية.">No backups found.</td>
                                </tr>
                                <?php else: ?>
                                <?php foreach ($data['backups'] as $b): ?>
                                <tr>
                                    <td class="ps-4 fw-medium"><?= htmlspecialchars($b['name']) ?></td>
                                    <td><?= htmlspecialchars($b['size']) ?></td>
                                    <td><?= htmlspecialchars($b['date']) ?></td>
                                     <td class="text-end pe-4">
                                         <div class="btn-group">
                                            <a href="index.php?download_backup=<?= urlencode($b['name']) ?>" class="btn btn-sm btn-outline-primary" title="Local Download" data-en="Local Download" data-ar="تحميل محلي"><i class="fas fa-download"></i></a>
                                            <form method="POST" class="d-inline" onsubmit="return confirm(document.documentElement.lang === 'ar' ? 'هل تريد استعادة هذه النسخة؟ سيتم الكتابة فوق البيانات الحالية!' : 'Restore this backup? Current data will be overwritten!');">
                                                <input type="hidden" name="filename" value="<?= htmlspecialchars($b['name']) ?>">
                                                <button type="submit" name="restore_backup" class="btn btn-sm btn-outline-success ms-1" title="Restore" data-en="Restore" data-ar="استعادة"><i class="bi bi-arrow-counterclockwise"></i></button>
                                            </form>
                                            <form method="POST" class="d-inline" onsubmit="return confirm(document.documentElement.lang === 'ar' ? 'هل تريد حذف هذه النسخة نهائياً؟' : 'Permanently delete this backup?');">
                                                <input type="hidden" name="filename" value="<?= htmlspecialchars($b['name']) ?>">
                                                <button type="submit" name="delete_backup" class="btn btn-sm btn-outline-danger ms-1" title="Delete" data-en="Delete" data-ar="حذف"><i class="bi bi-trash"></i></button>
                                            </form>
                                        </div>
                                    </td>
                                </tr>
                                <?php endforeach; ?>
                                <?php endif; ?>
                            </tbody>
                        </table>
                    </div>
                </div>
    </div>

    <?php elseif ($page === 'users'): ?>
    <?php require 'pages/users_view.php'; ?>
    <?php elseif ($page === 'cash_registers'): ?>
    <div class="card p-4 rounded-4 shadow-sm border-0">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <div>
                <h5 class="m-0 fw-bold text-primary" data-en="Cash Registers Management" data-ar="إدارة خزائن الكاشير">Cash Registers Management</h5>
                <p class="text-muted small mb-0">Define your shop counters and registers.</p>
                <div class="mt-2">
                    <?php 
                        $allowed_acts = LicenseService::getAllowedActivations();
                        $current_regs = count($data['cash_registers'] ?? []);
                    ?>
                    <span class="badge bg-light text-dark border">
                        <i class="bi bi-info-circle me-1"></i>
                        <span data-en="License Limit:" data-ar="حد الترخيص:">License Limit:</span> <?= $current_regs ?> / <?= $allowed_acts ?> 
                        <span data-en="Registers" data-ar="خزينة">Registers</span>
                    </span>
                </div>
            </div>
            <button class="btn btn-primary rounded-pill px-4" data-bs-toggle="modal" data-bs-target="#addRegisterModal">
                <i class="bi bi-plus-lg me-2"></i> <span data-en="Add Register" data-ar="إضافة خزينة">Add Register</span>
            </button>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="ID" data-ar="المعرف">ID</th>
                        <th data-en="Name" data-ar="الاسم">Name</th>
                        <th data-en="Status" data-ar="الحالة">Status</th>
                        <th data-en="Created At" data-ar="تاريخ الإنشاء">Created At</th>
                        <th class="text-end" data-en="Actions" data-ar="الإجراءات">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['cash_registers'] as $r): ?>
                    <tr>
                        <td>#<?= $r['id'] ?></td>
                        <td class="fw-bold"><?= htmlspecialchars($r['name']) ?></td>
                        <td>
                            <span class="badge rounded-pill <?= $r['status'] === 'active' ? 'bg-success' : 'bg-danger' ?>">
                                <?= ucfirst($r['status']) ?>
                            </span>
                        </td>
                        <td><?= $r['created_at'] ?></td>
                        <td class="text-end">
                            <button class="btn btn-sm btn-light rounded-circle" data-bs-toggle="modal" data-bs-target="#editRegisterModal<?= $r['id'] ?>"><i class="bi bi-pencil text-primary"></i></button>
                            <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
                                <input type="hidden" name="id" value="<?= $r['id'] ?>">
                                <button type="submit" name="delete_cash_register" class="btn btn-sm btn-light rounded-circle"><i class="bi bi-trash text-danger"></i></button>
                            </form>
                            
                            <!-- Edit Modal -->
                            <div class="modal fade" id="editRegisterModal<?= $r['id'] ?>" tabindex="-1">
                                <div class="modal-dialog">
                                    <div class="modal-content border-0 shadow">
                                        <div class="modal-header">
                                            <h5 class="modal-title">Edit Register</h5>
                                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                        </div>
                                        <form method="POST">
                                            <div class="modal-body text-start">
                                                <input type="hidden" name="id" value="<?= $r['id'] ?>">
                                                <div class="mb-3">
                                                    <label class="form-label">Register Name</label>
                                                    <input type="text" name="name" class="form-control" value="<?= htmlspecialchars($r['name']) ?>" required>
                                                </div>
                                                <div class="mb-3">
                                                    <label class="form-label" data-en="Status" data-ar="الحالة">Status</label>
                                                    <select name="status" class="form-select">
                                                        <option value="active" <?= $r['status'] === 'active' ? 'selected' : '' ?>>Active</option>
                                                        <option value="inactive" <?= $r['status'] === 'inactive' ? 'selected' : '' ?>>Inactive</option>
                                                    </select>
                                                </div>
                                            </div>
                                            <div class="modal-footer">
                                                <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                                                <button type="submit" name="edit_cash_register" class="btn btn-primary">Save Changes</button>
                                            </div>
                                        </form>
                                    </div>
                                </div>
                            </div>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <!-- Add Modal -->
    <div class="modal fade" id="addRegisterModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content border-0 shadow">
                <div class="modal-header">
                    <h5 class="modal-title">Add Cash Register</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <div class="mb-3">
                            <label class="form-label">Register Name</label>
                            <input type="text" name="name" class="form-control" placeholder="Counter 1" required>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_cash_register" class="btn btn-primary">Add Register</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <?php elseif ($page === 'register_sessions'): ?>
    <div class="card p-4 rounded-4 shadow-sm border-0 mb-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <div>
                <h5 class="m-0 fw-bold text-primary"><span data-en="Register Sessions" data-ar="جلسات الكاشير">Register Sessions</span> (<?= count($data['sessions']) ?>)</h5>
                <p class="text-muted small mb-0">Manage daily opening and closing of cash registers.</p>
            </div>
            <div>
                <?php 
                $active_session = db()->prepare("SELECT s.*, r.name as register_name FROM register_sessions s JOIN cash_registers r ON s.register_id = r.id WHERE s.user_id = ? AND s.status = 'open'");
                $active_session->execute([$_SESSION['user_id']]);
                $session = $active_session->fetch();
                ?>
                <?php if (!$session): ?>
                <button class="btn btn-success rounded-pill px-4" data-bs-toggle="modal" data-bs-target="#openRegisterModal">
                    <i class="bi bi-unlock me-2"></i> <span data-en="Open Register" data-ar="فتح الخزينة">Open Register</span>
                </button>
                <?php else: ?>
                <button class="btn btn-danger rounded-pill px-4" data-bs-toggle="modal" data-bs-target="#closeRegisterModal">
                    <i class="bi bi-lock me-2"></i> <span data-en="Close Register" data-ar="إغلاق الخزينة">Close Register</span>
                </button>
                <?php endif; ?>
            </div>
        </div>

        <?php if ($session): ?>
        <div class="alert alert-info border-0 shadow-sm d-flex justify-content-between align-items-center mb-4">
            <div>
                <i class="bi bi-info-circle-fill me-2"></i>
                Current Open Register: <strong><?= htmlspecialchars($session['register_name']) ?></strong> | 
                Opened At: <strong><?= $session['opened_at'] ?></strong> | 
                Opening Balance: <strong>OMR <?= number_format((float)$session['opening_balance'], 3) ?></strong>
            </div>
            <div>
                <a href="index.php?page=pos" class="btn btn-sm btn-primary rounded-pill px-3">Go to POS</a>
            </div>
        </div>
        <?php endif; ?>

        <!-- Filter Form -->
        <div class="card border-0 bg-light rounded-4 mb-4">
            <div class="card-body">
                <form action="index.php" method="GET" class="row g-3 align-items-end">
                    <input type="hidden" name="page" value="register_sessions">
                    
                    <?php if (can('users_view')): ?>
                    <div class="col-md-3">
                        <label class="form-label small fw-bold" data-en="Cashier" data-ar="الكاشير">Cashier</label>
                        <select name="user_id" class="form-select rounded-3">
                            <option value="" data-en="All Cashiers" data-ar="كل الكاشير">All Cashiers</option>
                            <?php foreach ($data['users'] as $u): ?>
                                <option value="<?= $u['id'] ?>" <?= (isset($_GET['user_id']) && $_GET['user_id'] == $u['id']) ? 'selected' : '' ?>>
                                    <?= htmlspecialchars($u['username']) ?>
                                </option>
                            <?php endforeach; ?>
                        </select>
                    </div>
                    <?php endif; ?>

                    <div class="col-md-3">
                        <label class="form-label small fw-bold" data-en="Date From" data-ar="من تاريخ">Date From</label>
                        <input type="date" name="date_from" class="form-control rounded-3" value="<?= htmlspecialchars($_GET['date_from'] ?? '') ?>">
                    </div>

                    <div class="col-md-3">
                        <label class="form-label small fw-bold" data-en="Date To" data-ar="إلى تاريخ">Date To</label>
                        <input type="date" name="date_to" class="form-control rounded-3" value="<?= htmlspecialchars($_GET['date_to'] ?? '') ?>">
                    </div>

                    <div class="col-md-3">
                        <div class="d-flex gap-2">
                            <button type="submit" class="btn btn-primary rounded-3 w-100">
                                <i class="bi bi-filter me-1"></i> <span data-en="Filter" data-ar="تصفية">Filter</span>
                            </button>
                            <a href="index.php?page=register_sessions" class="btn btn-outline-secondary rounded-3 w-100">
                                <i class="bi bi-x-circle me-1"></i> <span data-en="Clear" data-ar="مسح">Clear</span>
                            </a>
                        </div>
                    </div>
                </form>
            </div>
        </div>

        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th data-en="ID" data-ar="المعرف">ID</th>
                        <th data-en="Register" data-ar="الخزينة">Register</th>
                        <th data-en="Cashier" data-ar="الكاشير">Cashier</th>
                        <th data-en="Opened At" data-ar="وقت الفتح">Opened At</th>
                        <th data-en="Closed At" data-ar="وقت الإغلاق">Closed At</th>
                        <th data-en="Opening Bal." data-ar="رصيد الافتتاح">Opening Bal.</th>
                        <th data-en="Cash Sale" data-ar="مبيعات نقدية">Cash Sale</th>
                        <th data-en="Credit Card" data-ar="بطاقة ائتمان">Credit Card</th>
                        <th data-en="Credit" data-ar="آجل">Credit</th>
                        <th data-en="Total Sale" data-ar="إجمالي المبيعات">Total Sale</th>
                        <th data-en="Balance" data-ar="الرصيد">Balance</th>
                        <th data-en="Status" data-ar="الحالة">Status</th>
                        <th class="text-end" data-en="Report" data-ar="تقرير">Report</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($data['sessions'] as $s): ?>
                    <tr>
                        <td>#<?= $s['id'] ?></td>
                        <td class="fw-bold"><?= htmlspecialchars($s['register_name'] ?? 'N/A') ?></td>
                        <td><?= htmlspecialchars($s['username'] ?? 'N/A') ?></td>
                        <td><?= $s['opened_at'] ?></td>
                        <td><?= $s['closed_at'] ?? '---' ?></td>
                        <td>OMR <?= number_format((float)$s['opening_balance'], 3) ?></td>
                        <?php
                        $stats_stmt = db()->prepare("SELECT 
                            SUM(CASE WHEN LOWER(payment_method) = 'cash' THEN amount ELSE 0 END) as cash_total,
                            SUM(CASE WHEN LOWER(payment_method) IN ('card', 'credit card', 'visa', 'mastercard') THEN amount ELSE 0 END) as card_total,
                            SUM(CASE WHEN LOWER(payment_method) = 'credit' THEN amount ELSE 0 END) as credit_total,
                            SUM(CASE WHEN LOWER(payment_method) LIKE '%transfer%' OR LOWER(payment_method) LIKE '%bank%' THEN amount ELSE 0 END) as transfer_total,
                            SUM(amount) as total_sales
                            FROM (
                                SELECT p.payment_method, p.amount FROM payments p JOIN invoices i ON p.invoice_id = i.id WHERE i.register_session_id = ? AND i.status = 'paid' AND i.is_pos = 1
                            ) as combined_payments");
                        $stats_stmt->execute([$s['id']]);
                        $st = $stats_stmt->fetch();
                        $c_total = (float)($st['cash_total'] ?? 0);
                        $cd_total = (float)($st['card_total'] ?? 0);
                        $cr_total = (float)($st['credit_total'] ?? 0);
                        $tr_total = (float)($st['transfer_total'] ?? 0);
                        $t_sales = (float)($st['total_sales'] ?? 0);
                        $row_expected_cash = (float)$s['opening_balance'] + $c_total;
                        ?>
                        <td>OMR <?= number_format((float)$c_total, 3) ?></td>
                        <td>OMR <?= number_format((float)$cd_total, 3) ?></td>
                        <td>OMR <?= number_format((float)$cr_total, 3) ?></td>
                        <td class="fw-bold">OMR <?= number_format((float)$t_sales, 3) ?></td>
                        <td>
                            <?php if ($s['status'] === 'closed'): 
                                $diff = (float)($s['cash_in_hand'] ?? 0) - $row_expected_cash;
                                $color = $diff == 0 ? 'text-success' : ($diff > 0 ? 'text-info' : 'text-danger');
                            ?>
                            <span class="<?= $color ?> fw-bold">OMR <?= number_format((float)$diff, 3) ?></span>
                            <?php else: ?>---<?php endif; ?>
                        </td>
                        <td>
                            <span class="badge rounded-pill <?= $s['status'] === 'open' ? 'bg-success' : 'bg-secondary' ?>">
                                <?= ucfirst($s['status']) ?>
                            </span>
                        </td>

                        <td class="text-end">
                            <button class="btn btn-sm btn-light rounded-circle" onclick="loadSessionReport(<?= $s['id'] ?>)"><i class="bi bi-file-earmark-text text-primary"></i></button>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        <?= renderPagination($data['current_page'] ?? 1, $data['total_pages'] ?? 1) ?>
        
    </div>

    <!-- Modals outside loop for better structure -->
    <!-- Session Report Modal (Universal) -->
    <div class="modal fade" id="universalSessionReportModal" tabindex="-1">
        <div class="modal-dialog modal-lg">
            <div class="modal-content border-0 shadow">
                <div id="sessionReportContent">
                    <div class="modal-body text-center p-5">
                        <div class="spinner-border text-primary"></div>
                    </div>
                </div>
            </div>
        </div>
    </div>

<script>
function loadSessionReport(id) {
    var modalEl = document.getElementById('universalSessionReportModal');
    var modal = bootstrap.Modal.getOrCreateInstance(modalEl);
    
    // Reset content
    document.getElementById('sessionReportContent').innerHTML = '<div class="modal-body text-center p-5"><div class="spinner-border text-primary"></div></div>';
    
    modal.show();
    
    fetch('ajax_session_report.php?id=' + id)
        .then(response => response.text())
        .then(html => {
            document.getElementById('sessionReportContent').innerHTML = html;
        })
        .catch(err => {
            document.getElementById('sessionReportContent').innerHTML = '<div class="modal-header"><h5 class="modal-title">Error</h5><button type="button" class="btn-close" data-bs-dismiss="modal"></button></div><div class="modal-body text-danger">Failed to load report.</div>';
        });
}
</script>

    <!-- Open Register Modal -->
    <div class="modal fade" id="openRegisterModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content border-0 shadow">
                <div class="modal-header">
                    <h5 class="modal-title">Open Register Session</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <div class="mb-3">
                            <label class="form-label">Select Register / Counter</label>
                            <select name="register_id" class="form-select" required>
                                <?php foreach ($data['cash_registers'] as $reg): ?>
                                <option value="<?= $reg['id'] ?>"><?= htmlspecialchars($reg['name']) ?></option>
                                <?php endforeach; ?>
                            </select>
                        </div>
                        <div class="mb-3">
                            <label class="form-label">Opening Cash Balance (OMR)</label>
                            <input type="number" step="0.001" name="opening_balance" class="form-control" value="0.000" required>
                            <div class="form-text">Enter the amount of cash already in the drawer.</div>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="open_register" class="btn btn-success">Open Register</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <!-- Close Register Modal -->
    <?php if ($session): ?>
    <div class="modal fade" id="closeRegisterModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content border-0 shadow">
                <div class="modal-header">
                    <h5 class="modal-title">Close Register Session (#<?= $session['id'] ?>)</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <input type="hidden" name="session_id" value="<?= $session['id'] ?>">
                        <input type="hidden" name="redirect_to" value="register_sessions">
                        <div class="alert alert-warning py-2 small border-0 shadow-sm">
                            <i class="bi bi-exclamation-triangle me-2"></i> Before closing, please count all cash in your register.
                        </div>

                        <?php 
                        // Unified breakdown for closing
                        $curBreakdown = db()->prepare("SELECT payment_method, SUM(amount) as total FROM payments p JOIN invoices i ON p.invoice_id = i.id WHERE i.register_session_id = ? AND i.status = 'paid' AND i.is_pos = 1 GROUP BY payment_method");
                        $curBreakdown->execute([$session['id']]);
                        $curMethods = $curBreakdown->fetchAll();
                        
                        $cash_sales = 0;
                        $card_sales = 0;
                        $credit_sales = 0;
                        $bank_transfer_sales = 0;
                        
                        foreach ($curMethods as $m) {
                            $method = strtolower($m['payment_method']);
                            if ($method === 'cash') $cash_sales = $m['total'];
                            elseif ($method === 'card' || strpos($method, 'card') !== false) $card_sales = $m['total'];
                            elseif ($method === 'credit') $credit_sales = $m['total'];
                            elseif (strpos($method, 'transfer') !== false || strpos($method, 'bank') !== false) $bank_transfer_sales = $m['total'];
                            else $cash_sales += $m['total'];
                        }
                        $total_sales = $cash_sales + $card_sales + $credit_sales + $bank_transfer_sales;
                        $expected_cash = (float)$session['opening_balance'] + $cash_sales;
                        $total_all = (float)$session['opening_balance'] + $total_sales;
                        ?>
                        <div class="card bg-light border-0 mb-3 small">
                            <div class="card-body">
                                <h6 class="card-title fw-bold small text-uppercase mb-2">Session Summary</h6>
                                <div class="d-flex justify-content-between mb-1">
                                    <span class="text-muted">Opening Balance:</span>
                                    <span class="fw-bold">OMR <?= number_format((float)$session['opening_balance'], 3) ?></span>
                                </div>
                                <div class="d-flex justify-content-between mb-1">
                                    <span class="text-muted">Cash Sales:</span>
                                    <span class="fw-bold">OMR <?= number_format((float)$cash_sales, 3) ?></span>
                                </div>
                                <div class="d-flex justify-content-between mb-1">
                                    <span class="text-muted">Credit Card Sales:</span>
                                    <span class="fw-bold">OMR <?= number_format((float)$card_sales, 3) ?></span>
                                </div>
                                <div class="d-flex justify-content-between mb-1">
                                    <span class="text-muted">Credit:</span>
                                    <span class="fw-bold">OMR <?= number_format((float)$credit_sales, 3) ?></span>
                                </div>
                                <div class="d-flex justify-content-between mb-1">
                                    <span class="text-muted">Bank Transfer:</span>
                                    <span class="fw-bold">OMR <?= number_format((float)$bank_transfer_sales, 3) ?></span>
                                </div>
                                <div class="d-flex justify-content-between mb-1 border-top pt-1 mt-1 fw-bold text-dark">
                                    <span>Total Sales:</span>
                                    <span>OMR <?= number_format((float)$total_sales, 3) ?></span>
                                </div>
                                <hr class="my-2">
                                <div class="d-flex justify-content-between fw-bold text-primary mb-1 h6">
                                    <span>Balance (Total):</span>
                                    <span>OMR <?= number_format((float)$total_all, 3) ?></span>
                                </div>
                                <div class="d-flex justify-content-between fw-bold text-success">
                                    <span>Expected Cash:</span>
                                    <span>OMR <?= number_format((float)$expected_cash, 3) ?></span>
                                </div>
                            </div>
                        </div>

                        <div class="mb-3">
                            <h6 class="fw-bold small text-uppercase mb-2">Transaction Details</h6>
                            <div class="table-responsive" style="max-height: 200px; overflow-y: auto;">
                                <table class="table table-sm table-bordered mb-0 small">
                                    <thead class="bg-light sticky-top">
                                        <tr>
                                            <th>Time</th>
                                            <th>Order #</th>
                                            <th data-en="Customer" data-ar="العميل">Customer</th>
                                            <th>Method</th>
                                            <th class="text-end" data-en="Amount" data-ar="المبلغ">Amount</th>
                                        </tr>
                                    </thead>
                                    <tbody>
                                        <?php
                                        // Fetch from invoices
                                        $txs_stmt = db()->prepare("SELECT i.*, c.name as customer_name, GROUP_CONCAT(p.payment_method SEPARATOR ', ') as methods FROM invoices i LEFT JOIN payments p ON i.id = p.invoice_id LEFT JOIN customers c ON i.customer_id = c.id WHERE i.register_session_id = ? AND i.status = 'paid' AND i.is_pos = 1 GROUP BY i.id ORDER BY i.created_at DESC");
                                        $txs_stmt->execute([$session['id']]);
                                        $txs = $txs_stmt->fetchAll();
                                        foreach ($txs as $tx):
                                        ?>
                                        <tr>
                                            <td><?= date('H:i', strtotime($tx['created_at'])) ?></td>
                                            <td><?= htmlspecialchars($tx['transaction_no']) ?></td>
                                            <td><?= htmlspecialchars($tx['customer_name'] ?: 'Walk-in') ?></td>
                                            <td class="text-capitalize small"><?= htmlspecialchars($tx['methods'] ?: '---') ?></td>
                                            <td class="text-end"><?= number_format($tx['total_with_vat'], 3) ?></td>
                                        </tr>
                                        <?php endforeach; if(empty($txs)): ?>
                                        <tr><td colspan="5" class="text-center text-muted">No transactions</td></tr>
                                        <?php endif; ?>
                                    </tbody>
                                </table>
                            </div>
                        </div>

                        <div class="mb-3">
                            <label class="form-label">Total Cash in Hand (Actual Counted)</label>
                            <input type="number" step="0.001" name="cash_in_hand" class="form-control" required placeholder="0.000">
                        </div>
                        <div class="mb-3">
                            <label class="form-label">Closing Notes / Comments</label>
                            <textarea name="notes" class="form-control" rows="3" placeholder="Any discrepancies or remarks..."></textarea>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="close_register" class="btn btn-danger">Close Register & Submit</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
    <?php endif; ?>

    <?php elseif ($page === 'logs'): ?>
    <div class="card border-0 shadow-sm rounded-4 overflow-hidden">
        <div class="card-header bg-white py-3 d-flex justify-content-between align-items-center border-0">
            <div>
                <h5 class="m-0 fw-bold text-primary" data-en="System Logs" data-ar="سجلات النظام">System Logs</h5>
                <p class="text-muted small mb-0" data-en="Monitor system activity and errors" data-ar="مراقبة نشاط النظام والأخطاء">Monitor system activity and errors</p>
            </div>
            <div class="d-flex gap-2">
                <button onclick="window.location.reload()" class="btn btn-outline-primary btn-sm rounded-pill">
                    <i class="bi bi-arrow-clockwise"></i> Refresh
                </button>
            </div>
        </div>
        <div class="card-body p-0">
            <div class="bg-dark text-light p-4 font-monospace small" style="max-height: 600px; overflow-y: auto;">
                <?php
                $log_files = ['error_log', 'login_debug.log', 'post_debug.log'];
                $found_logs = false;
                foreach ($log_files as $file) {
                    $path = __DIR__ . '/' . $file;
                    if (file_exists($path) && is_readable($path)) {
                        $found_logs = true;
                        echo "<div class='mb-4'><h6 class='text-warning border-bottom border-secondary pb-2'>--- " . htmlspecialchars(basename($file)) . " ---</h6>";
                        $lines = shell_exec("tail -n 50 " . escapeshellarg($path));
                        echo "<pre class='mb-0 text-info'>" . htmlspecialchars((string)$lines) . "</pre></div>";
                    }
                }
                if (!$found_logs) {
                    echo "<div class='text-center py-5'><i class='bi bi-journal-x fs-1 opacity-25'></i><p class='mt-2 opacity-50'>No accessible log files found.</p></div>";
                }
                ?>
            </div>
        </div>
    </div>
    <?php endif; ?>
</div>

<!-- Add HR Department Modal -->
<div class="modal fade" id="addHrDepartmentModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content border-0 shadow">
            <div class="modal-header">
                <h5 class="modal-title" data-en="Add HR Department" data-ar="إضافة قسم">Add HR Department</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <form method="POST">
                <div class="modal-body">
                    <div class="mb-3">
                        <label class="form-label" data-en="Department Name" data-ar="اسم القسم">Department Name</label>
                        <input type="text" name="name" class="form-control" required>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="submit" name="add_hr_department" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
                </div>
            </form>
        </div>
    </div>
</div>

<!-- Add HR Employee Modal -->
<div class="modal fade" id="addHrEmployeeModal" tabindex="-1">
    <div class="modal-dialog modal-lg">
        <div class="modal-content border-0 shadow">
            <div class="modal-header">
                <h5 class="modal-title" data-en="Add HR Employee" data-ar="إضافة موظف">Add HR Employee</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <form method="POST">
                <div class="modal-body">
                    <div class="form-grid-3">
                        <div class="col-md-6">
                            <label class="form-label" data-en="Full Name" data-ar="الاسم الكامل">Full Name</label>
                            <input type="text" name="name" class="form-control" required>
                        </div>
                        <div class="col-md-6">
                            <label class="form-label" data-en="Department" data-ar="القسم">Department</label>
                            <select name="department_id" class="form-select">
                                <option value="">--- Select ---</option>
                                <?php foreach ($data['departments'] ?? [] as $d): ?>
                                <option value="<?= $d['id'] ?>"><?= htmlspecialchars($d['name']) ?></option>
                                <?php endforeach; ?>
                            </select>
                        </div>
                        <div class="col-md-6">
                            <label class="form-label" data-en="Email" data-ar="البريد">Email</label>
                            <input type="email" name="email" class="form-control">
                        </div>
                        <div class="col-md-6">
                            <label class="form-label" data-en="Phone" data-ar="الهاتف">Phone</label>
                            <input type="text" name="phone" class="form-control">
                        </div>
                        <div class="col-md-4">
                            <label class="form-label" data-en="Position" data-ar="المنصب">Position</label>
                            <input type="text" name="position" class="form-control">
                        </div>
                        <div class="col-md-4">
                            <label class="form-label" data-en="Basic Salary" data-ar="الراتب الأساسي">Basic Salary</label>
                            <input type="number" step="0.001" name="salary" class="form-control" value="0.000">
                        </div>
                        <div class="col-md-4">
                            <label class="form-label" data-en="Biometric ID" data-ar="معرف البصمة">Biometric ID</label>
                            <input type="text" name="biometric_id" class="form-control">
                        </div>
                        <div class="col-md-4">
                            <label class="form-label" data-en="Joining Date" data-ar="تاريخ الانضمام">Joining Date</label>
                            <input type="date" name="joining_date" class="form-control" value="<?= date('Y-m-d') ?>">
                        </div>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="submit" name="add_hr_employee" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
                </div>
            </form>
        </div>
    </div>
</div>

<!-- Add Role Group Modal -->
<div class="modal fade" id="addRoleGroupModal" tabindex="-1">
    <div class="modal-dialog modal-lg">
        <div class="modal-content border-0 shadow">
            <div class="modal-header">
                <h5 class="modal-title" data-en="Add Role Group" data-ar="إضافة مجموعة أدوار">Add Role Group</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <form method="POST">
                <div class="modal-body">
                    <div class="mb-3">
                        <label class="form-label" data-en="Group Name" data-ar="اسم المجموعة">Group Name</label>
                        <input type="text" name="name" class="form-control" required>
                    </div>
                    <div class="mb-3">
                        <div class="d-flex justify-content-between align-items-center mb-2">
                            <label class="form-label fw-semibold mb-0" data-en="Permissions" data-ar="الصلاحيات">Permissions</label>
                            <div class="d-flex gap-2">
                                <button type="button" class="btn btn-xs btn-outline-primary py-0 px-2 small select-all-btn" data-modal="#addRoleGroupModal">Select All</button>
                                <button type="button" class="btn btn-xs btn-outline-secondary py-0 px-2 small deselect-all-btn" data-modal="#addRoleGroupModal">Deselect All</button>
                            </div>
                        </div>
                        <div class="mb-3 p-2 bg-light rounded d-flex justify-content-between align-items-center flex-wrap gap-2">
                            <span class="small fw-bold me-2">Global Actions:</span>
                            <div class="d-flex gap-3">
                                <div class="form-check">
                                    <input class="form-check-input select-all-action" type="checkbox" data-action="view" id="addSelectAllView">
                                    <label class="form-check-label small" for="addSelectAllView" data-en="View" data-ar="عرض">View</label>
                                </div>
                                <div class="form-check">
                                    <input class="form-check-input select-all-action" type="checkbox" data-action="add" id="addSelectAllAdd">
                                    <label class="form-check-label small" for="addSelectAllAdd" data-en="Add" data-ar="إضافة">Add</label>
                                </div>
                                <div class="form-check">
                                    <input class="form-check-input select-all-action" type="checkbox" data-action="edit" id="addSelectAllEdit">
                                    <label class="form-check-label small" for="addSelectAllEdit" data-en="Edit" data-ar="تعديل" data-en="Edit" data-ar="تعديل">Edit</label>
                                </div>
                                <div class="form-check">
                                    <input class="form-check-input select-all-action" type="checkbox" data-action="delete" id="addSelectAllDelete">
                                    <label class="form-check-label small" for="addSelectAllDelete" data-en="Delete" data-ar="حذف" data-en="Delete" data-ar="حذف">Delete</label>
                                </div>
                            </div>
                        </div>
                        <div class="row overflow-auto pe-2" style="max-height: 500px;">
                            <?php 
                            foreach ($permission_groups as $group_name => $modules): ?>
                            <div class="permission-group-container col-12 mb-4">
                                <div class="mt-3 mb-2 bg-secondary bg-opacity-10 p-2 d-flex justify-content-between align-items-center rounded border-start border-primary border-3">
                                    <span class="fw-bold text-uppercase small text-primary"><?= $group_name ?></span>
                                    <div class="form-check mb-0">
                                        <input class="form-check-input select-all-group" type="checkbox" id="add_group_<?= strtolower(str_replace(' ', '_', $group_name)) ?>">
                                        <label class="form-check-label small fw-bold" for="add_group_<?= strtolower(str_replace(' ', '_', $group_name)) ?>">Group All</label>
                                    </div>
                                </div>
                                <div class="row g-3">
                                    <?php foreach ($modules as $m => $label): ?>
                                    <div class="col-md-6 mb-2 border-bottom pb-2">
                                        <div class="small fw-bold mb-2 text-dark border-start border-2 ps-2 border-info"><?= $label ?></div>
                                        <div class="d-flex gap-3 flex-wrap ps-2">
                                            <?php foreach (['view', 'add', 'edit', 'delete'] as $a): 
                                                $p = $m . '_' . $a;
                                            ?>
                                            <div class="form-check">
                                                <input class="form-check-input perm-check" type="checkbox" name="permissions[]" value="<?= $p ?>" data-action="<?= $a ?>" id="add_perm_<?= $p ?>">
                                                <label class="form-check-label small" for="add_perm_<?= $p ?>"><?= ucfirst($a) ?></label>
                                            </div>
                                            <?php endforeach; ?>
                                        </div>
                                    </div>
                                    <?php endforeach; ?>
                                </div>
                            </div>
                            <?php endforeach; ?>
                        </div>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="submit" name="add_role_group" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
                </div>
            </form>
        </div>
    </div>
</div>

<!-- Add User Modal -->


<!-- Add Customer Modal -->
<div class="modal fade" id="addCustomerModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content border-0 shadow">
            <div class="modal-header">
                <h5 class="modal-title">
                    <?php if ($page === 'suppliers'): ?>
                        <span data-en="Add New Supplier" data-ar="إضافة مورد جديد">Add New Supplier</span>
                    <?php else: ?>
                        <span data-en="Add New Customer" data-ar="إضافة عميل جديد">Add New Customer</span>
                    <?php endif; ?>
                </h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <form method="POST">
                <input type="hidden" name="type" value="<?= $page === 'suppliers' ? 'supplier' : 'customer' ?>">
                <div class="modal-body">
                    <div class="mb-3">
                        <label class="form-label" data-en="Name" data-ar="الاسم">Name</label>
                        <input type="text" name="name" class="form-control" required>
                    </div>
                    <div class="mb-3">
                        <label class="form-label" data-en="Email" data-ar="البريد الإلكتروني">Email</label>
                        <input type="email" name="email" class="form-control">
                    </div>
                    <div class="mb-3">
                        <label class="form-label" data-en="Phone" data-ar="الهاتف">Phone</label>
                        <input type="text" name="phone" class="form-control">
                    </div>
                    <div class="mb-3">
                        <label class="form-label" data-en="Tax ID / VAT No" data-ar="الرقم الضريبي">Tax ID / VAT No</label>
                        <input type="text" name="tax_id" class="form-control">
                    </div>
                    <div class="mb-3">
                        <label class="form-label" data-en="Initial Balance" data-ar="الرصيد الافتتاحي">Initial Balance</label>
                        <input type="number" step="0.001" name="balance" class="form-control" value="0.000">
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="submit" name="add_customer" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
                </div>
            </form>
        </div>
    </div>
</div>

<!-- Add Item Modal -->
<div class="modal fade" id="addItemModal" tabindex="-1">
    <div class="modal-dialog modal-lg">
        <div class="modal-content border-0 shadow">
            <div class="modal-header">
                <h5 class="modal-title" data-en="Add New Item" data-ar="إضافة صنف جديد">Add New Item</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <form method="POST" enctype="multipart/form-data">
                <div class="modal-body">
<div class="form-grid-3">
<div class="col-md-4"><label class="form-label" data-en="Name (EN)" data-ar="الاسم (إنجليزي)">Name (EN)</label><div class="input-group"><input type="text" name="name_en" id="addItemNameEn" class="form-control" required><button class="btn btn-outline-secondary btn-translate" type="button" data-source="addItemNameAr" data-target="addItemNameEn" data-to="en"><i class="bi bi-translate"></i> EN</button></div></div>
<div class="col-md-4"><label class="form-label" data-en="Name (AR)" data-ar="الاسم (عربي)">Name (AR)</label><div class="input-group"><input type="text" name="name_ar" id="addItemNameAr" class="form-control" required><button class="btn btn-outline-secondary btn-translate" type="button" data-source="addItemNameEn" data-target="addItemNameAr" data-to="ar"><i class="bi bi-translate"></i> AR</button></div></div>
<div class="col-md-4"><label class="form-label" data-en="SKU / Barcode" data-ar="الباركود">SKU / Barcode</label><div class="input-group"><input type="text" name="sku" id="skuInput" class="form-control"><button class="btn btn-outline-secondary" type="button" id="suggestSkuBtn" data-en="Suggest" data-ar="اقتراح">Suggest</button></div><div class="form-text" data-en="Reserved 13-digit scale barcodes cannot be saved here. Use the 5-digit scale item code for weighing products." data-ar="لا يمكن حفظ باركود الميزان الكامل المكوّن من 13 رقمًا هنا. استخدم كود الصنف المكوّن من 5 أرقام لأصناف الميزان.">Reserved 13-digit scale barcodes cannot be saved here. Use the 5-digit scale item code for weighing products.</div></div>
<div class="col-md-4"><label class="form-label" data-en="Category" data-ar="الفئة">Category</label><select name="category_id" class="form-select"><option value="">---</option><?php foreach ($data['categories'] ?? [] as $c): ?><option value="<?= $c['id'] ?>"><?= htmlspecialchars($c['name_en']) ?> / <?= htmlspecialchars($c['name_ar']) ?></option><?php endforeach; ?></select></div>
<div class="col-md-4"><label class="form-label" data-en="Unit" data-ar="الوحدة">Unit</label><select name="unit_id" class="form-select"><option value="">---</option><?php foreach ($data['units'] ?? [] as $u): ?><option value="<?= $u['id'] ?>"><?= htmlspecialchars(trim((string)($u['name_en'] ?? '')) !== '' ? $u['name_en'] : ($u['short_name_en'] ?? '---')) ?> / <?= htmlspecialchars(trim((string)($u['name_ar'] ?? '')) !== '' ? $u['name_ar'] : ($u['short_name_ar'] ?? '---')) ?></option><?php endforeach; ?></select></div>
<div class="col-md-4"><label class="form-label" data-en="Supplier" data-ar="المورد">Supplier</label><select name="supplier_id" class="form-select"><option value="">---</option><?php foreach ($data['suppliers'] ?? [] as $s): ?><option value="<?= $s['id'] ?>"><?= htmlspecialchars($s['name']) ?></option><?php endforeach; ?></select></div>
<div class="col-md-4"><label class="form-label" data-en="Sale Price" data-ar="سعر البيع">Sale Price</label><input type="number" step="0.001" name="sale_price" class="form-control" value="0.000"></div>
<div class="col-md-4"><label class="form-label" data-en="Purchase Price" data-ar="سعر الشراء">Purchase Price</label><input type="number" step="0.001" name="purchase_price" class="form-control" value="0.000"></div>
<div class="col-md-4"><label class="form-label" data-en="Initial Stock" data-ar="المخزون الحالي">Initial Stock</label><input type="number" step="0.001" name="stock_quantity" class="form-control" value="0.000"></div>
<div class="col-md-4"><label class="form-label" data-en="Min Stock Level" data-ar="الحد الأدنى للمخزون">Min Stock Level</label><input type="number" step="0.001" name="min_stock_level" class="form-control" value="0.000"></div>
<div class="col-md-4"><label class="form-label" data-en="VAT Rate (%)" data-ar="ضريبة القيمة المضافة (%)">VAT Rate (%)</label><input type="number" step="0.01" name="vat_rate" class="form-control" value="0"></div>
<div class="col-md-4"><label class="form-label" data-en="Item Picture" data-ar="صورة الصنف">Item Picture</label><input type="file" name="image" class="form-control" accept="image/*"></div>
<div class="col-md-12 full-width"><div class="form-check form-switch mt-4"><input class="form-check-input" type="checkbox" id="hasExpiryToggle"><label class="form-check-label" for="hasExpiryToggle" data-en="Has Expiry Date?" data-ar="هل له تاريخ انتهاء؟">Has Expiry Date?</label></div></div>
<div class="col-md-12 full-width" id="expiryDateContainer" style="display: none;"><label class="form-label" data-en="Expiry Date" data-ar="تاريخ الانتهاء">Expiry Date</label><input type="date" name="expiry_date" class="form-control"></div>
<div class="col-12 full-width mt-3"><hr><h6 data-en="Promotion Details" data-ar="تفاصيل العرض">Promotion Details</h6></div>
<div class="col-md-12 full-width promotionFieldsContainer" id="promotionFieldsContainer" style="display: none;"><div class="form-grid-3"><div><label class="form-label">Start Date</label><input type="date" name="promotion_start" class="form-control"></div><div><label class="form-label">End Date</label><input type="date" name="promotion_end" class="form-control"></div><div><label class="form-label">Percent (%)</label><input type="number" step="0.01" name="promotion_percent" class="form-control"></div></div></div>
</div></div><div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="submit" name="add_item" class="btn btn-primary" data-en="Save Item" data-ar="حفظ الصنف">Save Item</button>
                </div>
            </form>
        </div>
    </div>
</div>

<!-- Import Items Modal -->
<div class="modal fade" id="importItemsModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content border-0 shadow text-start">
            <div class="modal-header">
                <h5 class="modal-title" data-en="Import Items from Excel (CSV)" data-ar="استيراد الأصناف من اكسل (CSV)">Import Items from Excel (CSV)</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <form method="POST" enctype="multipart/form-data">
                <div class="modal-body">
                    <div class="alert alert-info py-2">
                        <div class="mb-2">
                            <small data-en="Please upload a CSV file with the following columns: SKU, English Name, Arabic Name, Sale Price, Cost Price. Reserved 13-digit scale barcodes will be skipped; save weighing products with their 5-digit item code instead." data-ar="يرجى رفع ملف CSV بالأعمدة التالية: الباركود، الاسم الإنجليزي، الاسم العربي، سعر البيع، سعر التكلفة. سيتم تجاهل باركود الميزان الكامل المكوّن من 13 رقمًا؛ احفظ أصناف الميزان باستخدام كود الصنف المكوّن من 5 أرقام.">
                                Please upload a CSV file with the following columns: SKU, English Name, Arabic Name, Sale Price, Cost Price. Reserved 13-digit scale barcodes will be skipped; save weighing products with their 5-digit item code instead.
                            </small>
                        </div>
                        <a href="index.php?action=download_items_template" class="btn btn-sm btn-primary">
                            <i class="bi bi-download"></i> <span data-en="Download Template" data-ar="تحميل القالب">Download Template</span>
                        </a>
                    </div>
                    <div class="mb-3">
                        <label class="form-label" data-en="Choose CSV File" data-ar="اختر ملف CSV">Choose CSV File</label>
                        <input type="file" name="excel_file" class="form-control" accept=".csv" required>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="submit" name="import_items" class="btn btn-success" data-en="Import Now" data-ar="استيراد الآن">Import Now</button>
                </div>
            </form>
        </div>
    </div>
</div>

<!-- Import Customers Modal -->
<div class="modal fade" id="importCustomersModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content border-0 shadow text-start">
            <div class="modal-header">
                <h5 class="modal-title" data-en="Import Customers from Excel (CSV)" data-ar="استيراد العملاء من اكسل (CSV)">Import Customers from Excel (CSV)</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <form method="POST" enctype="multipart/form-data">
                <div class="modal-body">
                    <div class="alert alert-info py-2">
                        <small data-en="Please upload a CSV file with the following columns: Name, Email, Phone, Tax ID, Balance." data-ar="يرجى رفع ملف CSV بالأعمدة التالية: الاسم، البريد الإلكتروني، الهاتف، الرقم الضريبي، الرصيد.">
                            Please upload a CSV file with the following columns: Name, Email, Phone, Tax ID, Balance.
                        </small>
                    </div>
                    <div class="mb-3">
                        <label class="form-label" data-en="Choose CSV File" data-ar="اختر ملف CSV">Choose CSV File</label>
                        <input type="file" name="excel_file" class="form-control" accept=".csv" required>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="submit" name="import_customers" class="btn btn-success" data-en="Import Now" data-ar="استيراد الآن">Import Now</button>
                </div>
            </form>
        </div>
    </div>
</div>

<!-- Import Suppliers Modal -->
<div class="modal fade" id="importSuppliersModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content border-0 shadow text-start">
            <div class="modal-header">
                <h5 class="modal-title" data-en="Import Suppliers from Excel (CSV)" data-ar="استيراد الموردين من اكسل (CSV)">Import Suppliers from Excel (CSV)</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <form method="POST" enctype="multipart/form-data">
                <div class="modal-body">
                    <div class="alert alert-info py-2">
                        <small data-en="Please upload a CSV file with the following columns: Name, Email, Phone, Tax ID, Balance." data-ar="يرجى رفع ملف CSV بالأعمدة التالية: الاسم، البريد الإلكتروني، الهاتف، الرقم الضريبي، الرصيد.">
                            Please upload a CSV file with the following columns: Name, Email, Phone, Tax ID, Balance.
                        </small>
                    </div>
                    <div class="mb-3">
                        <label class="form-label" data-en="Choose CSV File" data-ar="اختر ملف CSV">Choose CSV File</label>
                        <input type="file" name="excel_file" class="form-control" accept=".csv" required>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="submit" name="import_suppliers" class="btn btn-success" data-en="Import Now" data-ar="استيراد الآن">Import Now</button>
                </div>
            </form>
        </div>
    </div>
</div>

<!-- Import Categories Modal -->
<div class="modal fade" id="importCategoriesModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content border-0 shadow text-start">
            <div class="modal-header">
                <h5 class="modal-title" data-en="Import Categories from Excel (CSV)" data-ar="استيراد الفئات من اكسل (CSV)">Import Categories from Excel (CSV)</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <form method="POST" enctype="multipart/form-data">
                <div class="modal-body">
                    <div class="alert alert-info py-2">
                        <small data-en="Please upload a CSV file with the following columns: Name (EN), Name (AR)." data-ar="يرجى رفع ملف CSV بالأعمدة التالية: الاسم (إنجليزي)، الاسم (عربي).">
                            Please upload a CSV file with the following columns: Name (EN), Name (AR).
                        </small>
                    </div>
                    <div class="mb-3">
                        <label class="form-label" data-en="Choose CSV File" data-ar="اختر ملف CSV">Choose CSV File</label>
                        <input type="file" name="excel_file" class="form-control" accept=".csv" required>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="submit" name="import_categories" class="btn btn-success" data-en="Import Now" data-ar="استيراد الآن">Import Now</button>
                </div>
            </form>
        </div>
    </div>
</div>

<!-- Import Units Modal -->
<div class="modal fade" id="importUnitsModal" tabindex="-1">
    <div class="modal-dialog modal-lg modal-dialog-centered">
        <div class="modal-content border-0 shadow-lg text-start unit-modal">
            <div class="modal-header">
                <div>
                    <span class="units-modal-kicker" data-en="Bulk setup" data-ar="إعداد جماعي">Bulk setup</span>
                    <h5 class="modal-title" data-en="Import Units" data-ar="استيراد الوحدات">Import Units</h5>
                    <p class="text-muted small mb-0" data-en="Upload one file to create multiple units at once." data-ar="ارفع ملفاً واحداً لإنشاء عدة وحدات دفعة واحدة.">Upload one file to create multiple units at once.</p>
                </div>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <form method="POST" enctype="multipart/form-data">
                <div class="modal-body pt-4">
                    <div class="unit-import-note mb-3">
                        <strong data-en="Supported columns" data-ar="الأعمدة المدعومة">Supported columns</strong>
                        <ul class="mt-2 small">
                            <li data-en="Name (EN), Name (AR)" data-ar="الاسم (إنجليزي)، الاسم (عربي)">Name (EN), Name (AR)</li>
                            <li data-en="CSV and XLSX files are accepted." data-ar="يتم قبول ملفات CSV و XLSX.">CSV and XLSX files are accepted.</li>
                            <li data-en="If Arabic is blank, the English name will be reused automatically." data-ar="إذا كان الاسم العربي فارغاً فسيتم استخدام الاسم الإنجليزي تلقائياً.">If Arabic is blank, the English name will be reused automatically.</li>
                        </ul>
                    </div>
                    <div class="unit-form-section">
                        <div class="unit-field">
                            <label class="form-label" data-en="Choose file" data-ar="اختر الملف">Choose file</label>
                            <input type="file" name="excel_file" class="form-control" accept=".csv,.xlsx" required>
                            <div class="form-text" data-en="Tip: export current units first if you want a formatting reference." data-ar="نصيحة: صدّر الوحدات الحالية أولاً إذا كنت تريد مرجعاً للتنسيق.">Tip: export current units first if you want a formatting reference.</div>
                        </div>
                    </div>
                </div>
                <div class="modal-footer pt-0 border-0">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="submit" name="import_units" class="btn btn-success" data-en="Import Now" data-ar="استيراد الآن">Import Now</button>
                </div>
            </form>
        </div>
    </div>
</div>


<!-- Add Category Modal -->
<div class="modal fade" id="addCategoryModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content border-0 shadow">
            <div class="modal-header">
                <h5 class="modal-title" data-en="Add Category" data-ar="إضافة فئة">Add Category</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <form method="POST">
                <div class="modal-body">
                    <div class="mb-3">
                        <label class="form-label" data-en="Name (EN)" data-ar="الاسم (إنجليزي)">Name (EN)</label>
                        <div class="input-group">
                            <input type="text" name="name_en" id="addCatNameEn" class="form-control" required>
                            <button class="btn btn-outline-secondary btn-translate" type="button" data-source="addCatNameAr" data-target="addCatNameEn" data-to="en">
                                <i class="bi bi-translate"></i>
                            </button>
                        </div>
                    </div>
                    <div class="mb-3">
                        <label class="form-label" data-en="Name (AR)" data-ar="الاسم (عربي)">Name (AR)</label>
                        <div class="input-group">
                            <input type="text" name="name_ar" id="addCatNameAr" class="form-control" required>
                            <button class="btn btn-outline-secondary btn-translate" type="button" data-source="addCatNameEn" data-target="addCatNameAr" data-to="ar">
                                <i class="bi bi-translate"></i>
                            </button>
                        </div>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="submit" name="add_category" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
                </div>
            </form>
        </div>
    </div>
</div>

<!-- Add Unit Modal -->
<div class="modal fade" id="addUnitModal" tabindex="-1">
    <div class="modal-dialog modal-lg modal-dialog-centered">
        <div class="modal-content border-0 shadow-lg text-start unit-modal">
            <div class="modal-header">
                <div>
                    <span class="units-modal-kicker" data-en="Create unit" data-ar="إنشاء وحدة">Create unit</span>
                    <h5 class="modal-title" data-en="Add Unit" data-ar="إضافة وحدة">Add Unit</h5>
                    <p class="text-muted small mb-0" data-en="Use the full unit name in English and Arabic so stock screens stay consistent." data-ar="استخدم اسم الوحدة الكامل بالإنجليزية والعربية حتى تبقى شاشات المخزون متناسقة.">Use the full unit name in English and Arabic so stock screens stay consistent.</p>
                </div>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <form method="POST">
                <div class="modal-body pt-4">
                    <div class="unit-form-shell">
                        <section class="unit-form-section">
                            <div class="unit-form-section__header">
                                <div>
                                    <h6 class="mb-1" data-en="Display names" data-ar="الأسماء الكاملة">Display names</h6>
                                    <p class="text-muted small mb-0" data-en="Shown in item forms, reports, and detailed views." data-ar="تظهر في نماذج الأصناف والتقارير والعروض التفصيلية.">Shown in item forms, reports, and detailed views.</p>
                                </div>
                                <span class="units-helper-pill" data-en="Bilingual" data-ar="ثنائي اللغة">Bilingual</span>
                            </div>
                            <div class="unit-form-grid">
                                <div class="unit-field">
                                    <label class="form-label" data-en="Name (EN)" data-ar="الاسم (إنجليزي)">Name (EN)</label>
                                    <div class="input-group">
                                        <input type="text" name="name_en" id="addUnitNameEn" class="form-control" required>
                                        <button class="btn btn-outline-secondary btn-translate" type="button" data-source="addUnitNameAr" data-target="addUnitNameEn" data-to="en">
                                            <i class="bi bi-translate"></i>
                                        </button>
                                    </div>
                                    <div class="form-text" data-en="Example: Kilogram" data-ar="مثال: Kilogram">Example: Kilogram</div>
                                </div>
                                <div class="unit-field">
                                    <label class="form-label" data-en="Name (AR)" data-ar="الاسم (عربي)">Name (AR)</label>
                                    <div class="input-group">
                                        <input type="text" name="name_ar" id="addUnitNameAr" class="form-control" required>
                                        <button class="btn btn-outline-secondary btn-translate" type="button" data-source="addUnitNameEn" data-target="addUnitNameAr" data-to="ar">
                                            <i class="bi bi-translate"></i>
                                        </button>
                                    </div>
                                    <div class="form-text" data-en="Example: كيلوغرام" data-ar="مثال: كيلوغرام">Example: كيلوغرام</div>
                                </div>
                            </div>
                        </section>
                        <section class="unit-form-section">
                            <div class="unit-form-section__header">
                                <div>
                                    <h6 class="mb-1" data-en="Name preview" data-ar="معاينة الأسماء">Name preview</h6>
                                    <p class="text-muted small mb-0" data-en="This is how the unit name will appear across the app." data-ar="هكذا سيظهر اسم الوحدة في جميع أجزاء التطبيق.">This is how the unit name will appear across the app.</p>
                                </div>
                                <span class="units-helper-pill" data-en="Live label" data-ar="التسمية النهائية">Live label</span>
                            </div>
                            <div class="unit-preview-card mt-0">
                                <span class="unit-preview-card__label" data-en="Example preview" data-ar="معاينة مثال">Example preview</span>
                                <div class="unit-preview-row">
                                    <span class="unit-preview-chip">Kilogram</span>
                                    <span class="unit-preview-chip">كيلوغرام</span>
                                </div>
                            </div>
                        </section>
                    </div>
                </div>
                <div class="modal-footer pt-0 border-0">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="submit" name="add_unit" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
                </div>
            </form>
        </div>
    </div>
</div>

<script>
document.addEventListener('DOMContentLoaded', function() {
    console.log("DOM Content Loaded - Accounting System");
    try {
        // Initialize Select2 for all searchable dropdowns
        $('.select2').each(function() {
            $(this).select2({
                width: '100%',
                dropdownParent: $(this).closest('.modal').length ? $(this).closest('.modal') : $(document.body)
            });
        });

        const hasExpiryToggle = document.getElementById('hasExpiryToggle');
    const expiryDateContainer = document.getElementById('expiryDateContainer');
    const suggestSkuBtn = document.getElementById('suggestSkuBtn');
    const skuInput = document.getElementById('skuInput');

    if (suggestSkuBtn && skuInput) {
        suggestSkuBtn.addEventListener('click', function() {
            const sku = Math.floor(100000000000 + Math.random() * 900000000000).toString();
            skuInput.value = sku;
        });

        skuInput.addEventListener('keydown', function(e) {
            if (e.key === 'Enter') {
                e.preventDefault();
                console.log("Barcode scan detected in SKU field, preventing form submission");
            }
        });
    }

    // Toggle Expiry Date visibility
    if (hasExpiryToggle && expiryDateContainer) {
        hasExpiryToggle.addEventListener('change', function() {
            expiryDateContainer.style.display = this.checked ? 'block' : 'none';
        });
    }

    const isPromotionToggle = document.getElementById('isPromotionToggle');
    const promotionFieldsContainer = document.getElementById('promotionFieldsContainer');
    if (isPromotionToggle && promotionFieldsContainer) {
        isPromotionToggle.addEventListener('change', function() {
            promotionFieldsContainer.style.display = this.checked ? 'flex' : 'none';
        });
    }

    // Translation Logic
    document.querySelectorAll('.btn-translate').forEach(btn => {
        btn.addEventListener('click', function() {
            const sourceId = this.getAttribute('data-source');
            const targetId = this.getAttribute('data-target');
            const targetLang = this.getAttribute('data-to');
            const sourceText = document.getElementById(sourceId).value;

            if (!sourceText) {
                alert(targetLang === 'ar' ? 'يرجى إدخال النص أولاً' : 'Please enter text first');
                return;
            }

            const originalHtml = this.innerHTML;
            this.disabled = true;
            this.innerHTML = '<span class="spinner-border spinner-border-sm"></span>';

            const formData = new FormData();
            formData.append('action', 'translate');
            formData.append('text', sourceText);
            formData.append('target', targetLang);

            fetch('index.php', {
                method: 'POST',
                body: formData
            })
            .then(res => res.json())
            .then(data => {
                if (data.success) {
                    document.getElementById(targetId).value = data.translated;
                } else {
                    alert('Translation error: ' + (data.error || 'Unknown error'));
                }
            })
            .catch(err => {
                console.error(err);
                alert('Connection error');
            })
            .finally(() => {
                this.disabled = false;
                this.innerHTML = originalHtml;
            });
        });
    });

    document.querySelectorAll('.isPromotionToggleEdit').forEach(toggle => {
        toggle.addEventListener('change', function() {
            const id = this.getAttribute('data-id');
            const container = document.getElementById('promotionFieldsContainerEdit' + id);
            if (container) {
                container.style.display = this.checked ? 'flex' : 'none';
            }
        });
    });

    // Status change logic for Paid Amount field
    const togglePaidAmount = (statusId, containerId) => {
        const statusEl = document.getElementById(statusId);
        const containerEl = document.getElementById(containerId);
        if (statusEl && containerEl) {
            statusEl.addEventListener('change', function() {
                if (this.value === 'partially_paid') {
                    containerEl.style.display = 'block';
                } else {
                    containerEl.style.display = 'none';
                }
            });
        }
    };
    togglePaidAmount('add_status', 'addPaidAmountContainer');
    togglePaidAmount('edit_status', 'editPaidAmountContainer');

    // Pay Invoice Logic
    document.querySelectorAll('.pay-invoice-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const id = this.getAttribute('data-id');
            const total = parseFloat(this.getAttribute('data-total'));
            const paid = parseFloat(this.getAttribute('data-paid') || 0);
            const remaining = total - paid;

            document.getElementById('pay_invoice_id').value = id;
            document.getElementById('pay_invoice_total').value = total.toFixed(3);
            document.getElementById('pay_remaining_amount').value = remaining.toFixed(3);
            document.getElementById('pay_amount').value = remaining.toFixed(3);
            document.getElementById('pay_amount').max = remaining.toFixed(3);
        });
    });

    // Show receipt modal if needed
    <?php if (isset($_SESSION['trigger_receipt_modal'])): 
        $rid = (int)$_SESSION['show_receipt_id'];
        unset($_SESSION['trigger_receipt_modal']);
    ?>
    if (typeof showReceipt === 'function') {
        showReceipt(<?= $rid ?>);
    } else {
        setTimeout(() => { if (typeof showReceipt === 'function') showReceipt(<?= $rid ?>); }, 500);
    }
    <?php endif; ?>

    function showReceipt(paymentId) {
        fetch(`index.php?action=get_payment_details&payment_id=${paymentId}`)
            .then(res => res.json())
            .then(data => {
                if (!data) return;
                document.getElementById('receiptNo').textContent = 'RCP-' + data.id.toString().padStart(5, '0');
                document.getElementById('receiptDate').textContent = data.payment_date;
                document.getElementById('receiptCustomer').textContent = data.customer_name || '---';
                document.getElementById('receiptInvNo').textContent = (data.inv_type === 'purchase' ? 'PUR-' : 'INV-') + data.inv_id.toString().padStart(5, '0');
                document.getElementById('receiptMethod').textContent = data.payment_method;
                document.getElementById('receiptAmount').textContent = parseFloat(data.amount).toFixed(3);
                document.getElementById('receiptAmountWords').textContent = data.amount_words;
                
                const outletEl = document.getElementById('receiptOutletName');
                if (outletEl) {
                    outletEl.textContent = data.outlet_name ? (data.outlet_name) : '';
                    outletEl.style.display = data.outlet_name ? 'block' : 'none';
                }

                // Update labels for Purchase vs Sale
                const partyLabel = document.getElementById('receiptPartyLabel');
                const againstLabel = document.getElementById('receiptAgainstLabel');
                const receiptTitle = document.querySelector('#receiptModal .modal-title');
                const receiptH4 = document.querySelector('.receipt-container h4.letter-spacing-2');

                if (data.inv_type === 'purchase') {
                    partyLabel.textContent = 'Paid To';
                    partyLabel.setAttribute('data-en', 'Paid To');
                    partyLabel.setAttribute('data-ar', 'صرف إلى');
                    
                    againstLabel.textContent = 'Against Purchase';
                    againstLabel.setAttribute('data-en', 'Against Purchase');
                    againstLabel.setAttribute('data-ar', 'مقابل شراء');

                    receiptTitle.textContent = 'Payment Voucher';
                    receiptTitle.setAttribute('data-en', 'Payment Voucher');
                    receiptTitle.setAttribute('data-ar', 'سند صرف');

                    receiptH4.textContent = 'PAYMENT VOUCHER';
                    receiptH4.setAttribute('data-en', 'PAYMENT VOUCHER');
                    receiptH4.setAttribute('data-ar', 'سند صرف');
                } else {
                    partyLabel.textContent = 'Received From';
                    partyLabel.setAttribute('data-en', 'Received From');
                    partyLabel.setAttribute('data-ar', 'وصلنا من');

                    againstLabel.textContent = 'Against Invoice';
                    againstLabel.setAttribute('data-en', 'Against Invoice');
                    againstLabel.setAttribute('data-ar', 'مقابل فاتورة');

                    receiptTitle.textContent = 'Payment Receipt';
                    receiptTitle.setAttribute('data-en', 'Payment Receipt');
                    receiptTitle.setAttribute('data-ar', 'سند قبض');

                    receiptH4.textContent = 'PAYMENT RECEIPT';
                    receiptH4.setAttribute('data-en', 'PAYMENT RECEIPT');
                    receiptH4.setAttribute('data-ar', 'سند قبض');
                }
                
                const notesContainer = document.getElementById('receiptNotesContainer');
                if (data.notes) {
                    document.getElementById('receiptNotes').textContent = data.notes;
                    notesContainer.style.display = 'block';
                } else {
                    notesContainer.style.display = 'none';
                }
                
                const receiptModal = new bootstrap.Modal(document.getElementById('receiptModal'));
                receiptModal.show();
            });
    };

    document.querySelectorAll('.view-payments-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const invoiceId = this.getAttribute('data-id');
            const tbody = document.getElementById('paymentsTableBody');
            tbody.innerHTML = '<tr><td colspan="5" class="text-center" data-en="Loading..." data-ar="جاري التحميل...">Loading...</td></tr>';
            
            fetch(`index.php?action=get_payments&invoice_id=${invoiceId}`)
                .then(res => res.json())
                .then(data => {
                    tbody.innerHTML = '';
                    if (data.length === 0) {
                        tbody.innerHTML = '<tr><td colspan="5" class="text-center" data-en="No payments found." data-ar="لا توجد مدفوعات.">No payments found.</td></tr>';
                        return;
                    }
                    data.forEach(p => {
                        const tr = document.createElement('tr');
                        tr.innerHTML = `
                            <td>RCP-${p.id.toString().padStart(5, '0')}</td>
                            <td>${p.payment_date}</td>
                            <td>${p.payment_method}</td>
                            <td class="text-end fw-bold">OMR ${parseFloat(p.amount).toFixed(3)}</td>
                            <td class="text-end">
                                <button class="btn btn-sm btn-outline-primary" onclick="showReceipt(${p.id})">
                                    <i class="bi bi-printer"></i>
                                </button>
                            </td>
                        `;
                        tbody.appendChild(tr);
                    });
                });
        });
    });

    window.printReceipt = function() {
        const content = document.getElementById('printableReceipt').innerHTML;
        const originalContent = document.body.innerHTML;
        document.body.innerHTML = content;
        window.print();
        document.body.innerHTML = originalContent;
        window.location.reload();
    };

    // Handle Expiry toggle in Edit Modals
    document.querySelectorAll('.hasExpiryToggleEdit').forEach(toggle => {
        toggle.addEventListener('change', function() {
            const container = this.closest('.row').querySelector('.expiryDateContainerEdit');
            if (container) {
                container.style.display = this.checked ? 'block' : 'none';
                if (!this.checked) {
                    container.querySelector('input').value = '';
                }
            }
        });
    });

    // Invoice Form Logic
    const initInvoiceForm = (searchInputId, suggestionsId, tableBodyId, grandTotalId, subtotalId, totalVatId) => {
        const searchInput = document.getElementById(searchInputId);
        const suggestions = document.getElementById(suggestionsId);
        const tableBody = document.getElementById(tableBodyId);
        const grandTotalEl = document.getElementById(grandTotalId);
        const subtotalEl = document.getElementById(subtotalId);
        const totalVatEl = document.getElementById(totalVatId);

        if (!searchInput || !tableBody) return;

        let timeout = null;
        searchInput.addEventListener('input', function() {
            clearTimeout(timeout);
            const q = this.value.trim();
            if (q.length < 2) {
                suggestions.style.display = 'none';
                return;
            }

            timeout = setTimeout(() => {
                fetch(`index.php?action=search_items&q=${encodeURIComponent(q)}`)
                    .then(res => res.ok ? res.json() : [])
                    .then(data => {
                        suggestions.innerHTML = '';
                        if (data.length > 0) {
                            data.forEach(item => {
                                const btn = document.createElement('button');
                                btn.type = 'button';
                                btn.className = 'list-group-item list-group-item-action';
                                btn.innerHTML = `
                                    <div class="d-flex justify-content-between">
                                        <span><strong>${item.sku}</strong> - ${item.name_en} / ${item.name_ar}</span>
                                        <span class="text-muted small">Stock: ${item.stock_quantity}</span>
                                    </div>
                                `;
                                btn.onclick = () => addItemToTable(item, tableBody, searchInput, suggestions, grandTotalEl, subtotalEl, totalVatEl);
                                suggestions.appendChild(btn);
                            });
                            suggestions.style.display = 'block';
                        } else {
                            suggestions.style.display = 'none';
                        }
                    });
            }, 300);
        });

        // Close suggestions when clicking outside
        document.addEventListener('click', function(e) {
            if (!searchInput.contains(e.target) && !suggestions.contains(e.target)) {
                suggestions.style.display = 'none';
            }
        });
    };

    function addItemToTable(item, tableBody, searchInput, suggestions, grandTotalEl, subtotalEl, totalVatEl, customData = null) {
        if (suggestions) suggestions.style.display = 'none';
        if (searchInput) searchInput.value = '';

        const allowZeroStock = (typeof companySettings !== 'undefined' && String(companySettings.allow_zero_stock_sell) === '1');
        const currentStock = parseFloat(item.stock_quantity) || 0;

        if (invoiceType === 'sale' && !allowZeroStock && !customData) {
            const existingInTable = Array.from(tableBody.querySelectorAll('.item-row')).find(row => row.querySelector('.item-id-input').value == item.id);
            let currentQtyInTable = 0;
            if (existingInTable) {
                currentQtyInTable = parseFloat(existingInTable.querySelector('.item-qty').value) || 0;
            }
            
            if (currentQtyInTable + 1 > currentStock) {
                alert('Insufficient stock! Available: ' + currentStock);
                return;
            }
        }
        
        const existingRow = Array.from(tableBody.querySelectorAll('.item-id-input')).find(input => input.value == item.id);
        if (existingRow && !customData) {
            const row = existingRow.closest('tr');
            const qtyInput = row.querySelector('.item-qty');
            qtyInput.value = parseFloat(qtyInput.value) + 1;
            recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl);
            return;
        }

        const row = document.createElement('tr');
        row.className = 'item-row';
        const price = customData ? customData.unit_price : (invoiceType === 'sale' ? item.sale_price : item.purchase_price);
        const qty = customData ? customData.quantity : 1;
        const vatRate = item.vat_rate || 0;
        
        row.innerHTML = `
            <td>
                <input type="hidden" name="item_ids[]" class="item-id-input" value="${item.id}">
                <input type="hidden" class="item-row-stock" value="${item.stock_quantity}">
                <input type="hidden" class="item-vat-rate" value="${vatRate}">
                <div><strong>${item.name_en}</strong></div>
                <div class="small text-muted">${item.name_ar} (${item.sku})</div>
            </td>
            <td><input type="number" step="0.001" name="quantities[]" class="form-control item-qty" value="${qty}" required></td>
            <td><input type="number" step="0.001" name="prices[]" class="form-control item-price" value="${price}" required></td>
            <td><input type="text" class="form-control bg-light" value="${parseFloat(vatRate || 0).toFixed(2)}%" readonly></td>
            <td><input type="number" step="0.001" class="form-control item-total" value="${(qty * price).toFixed(3)}" readonly></td>
            <td><button type="button" class="btn btn-outline-danger btn-sm remove-row"><i class="bi bi-trash"></i></button></td>
        `;
        
        tableBody.appendChild(row);
        attachRowListeners(row, tableBody, grandTotalEl, subtotalEl, totalVatEl);
        recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl);
    }

    function recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl) {
        let subtotal = 0;
        let totalVat = 0;
        tableBody.querySelectorAll('.item-row').forEach(row => {
            const qty = parseFloat(row.querySelector('.item-qty').value) || 0;
            const price = parseFloat(row.querySelector('.item-price').value) || 0;
            const vatRate = parseFloat(row.querySelector('.item-vat-rate').value) || 0;
            
            const total = qty * price;
            const vatAmount = total * (vatRate / 100);
            
            row.querySelector('.item-total').value = total.toFixed(3);
            subtotal += total;
            totalVat += vatAmount;
        });
        const grandTotal = subtotal + totalVat;
        
        if (subtotalEl) subtotalEl.textContent = 'OMR ' + subtotal.toFixed(3);
        if (totalVatEl) totalVatEl.textContent = 'OMR ' + totalVat.toFixed(2);
        if (grandTotalEl) grandTotalEl.textContent = 'OMR ' + grandTotal.toFixed(3);
    }

    function attachRowListeners(row, tableBody, grandTotalEl, subtotalEl, totalVatEl) {
        row.querySelector('.item-qty').addEventListener('input', function() {
            const allowZeroStock = (typeof companySettings !== 'undefined' && String(companySettings.allow_zero_stock_sell) === '1');
            if (invoiceType === 'sale' && !allowZeroStock) {
                const stock = parseFloat(row.querySelector('.item-row-stock').value) || 0;
                const qty = parseFloat(this.value) || 0;
                if (qty > stock) {
                    alert('Insufficient stock! Available: ' + stock);
                    this.value = stock;
                }
            }
            recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl);
        });
        row.querySelector('.item-price').addEventListener('input', () => recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl));
        row.querySelector('.remove-row').addEventListener('click', function() {
            row.remove();
            recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl);
        });
    }

    const invoiceType = '<?= in_array($page, ["sales", "quotations"]) ? "sale" : (in_array($page, ["purchases", "lpos"]) ? "purchase" : "") ?>';
    initInvoiceForm('productSearchInput', 'searchSuggestions', 'invoiceItemsTableBody', 'grandTotal', 'subtotal', 'totalVat');
    initInvoiceForm('editProductSearchInput', 'editSearchSuggestions', 'editInvoiceItemsTableBody', 'edit_grandTotal', 'edit_subtotal', 'edit_totalVat');

    // LPO Form Logic
    initInvoiceForm('lpoProductSearchInput', 'lpoSearchSuggestions', 'lpoItemsTableBody', 'lpo_grand_display', 'lpo_subtotal_display', 'lpo_vat_display');
    initInvoiceForm('editLpoProductSearchInput', 'editLpoSearchSuggestions', 'editLpoItemsTableBody', 'edit_lpo_grand_display', 'edit_lpo_subtotal_display', 'edit_lpo_vat_display');

    document.querySelectorAll('.edit-lpo-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const data = JSON.parse(this.dataset.json);
            document.getElementById('edit_lpo_id').value = data.id;
            const supplierSelect = document.getElementById('edit_lpo_supplier_id');
            supplierSelect.value = data.supplier_id;
            if (window.jQuery && $(supplierSelect).data('select2')) {
                $(supplierSelect).trigger('change');
            }
            document.getElementById('edit_lpo_date').value = data.lpo_date;
            document.getElementById('edit_lpo_delivery_date').value = data.delivery_date || '';
            document.getElementById('edit_lpo_status').value = data.status || 'pending';
            document.getElementById('edit_lpo_terms').value = data.terms_conditions || '';
            
            const tableBody = document.getElementById('editLpoItemsTableBody');
            tableBody.innerHTML = '';
            
            data.items.forEach(item => {
                addItemToTable({
                    id: item.item_id,
                    name_en: item.name_en,
                    name_ar: item.name_ar,
                    sku: '',
                    vat_rate: item.vat_rate || 0
                }, tableBody, null, null, 
                document.getElementById('edit_lpo_grand_display'), 
                document.getElementById('edit_lpo_subtotal_display'), 
                document.getElementById('edit_lpo_vat_display'),
                { quantity: item.quantity, unit_price: item.unit_price });
            });
        });
    });

    document.querySelectorAll('.view-lpo-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const data = JSON.parse(this.dataset.json);
            window.viewAndPrintLPO(data);
        });
    });

    window.viewAndPrintLPO = function(data) {
        const modal = new bootstrap.Modal(document.getElementById('viewLpoModal'));
        const content = document.getElementById('lpoDetailsContent');
        
        const logoUrl = companySettings.company_logo || '';
        const companyHeader = `
            <div class="row align-items-center mb-4">
                <div class="col-6">
                    ${logoUrl ? `<img src="${logoUrl}" alt="Logo" style="max-height: 80px;" class="mb-3">` : ''}
                    <h4 class="fw-bold mb-0">${companySettings.company_name || 'Your Company'}</h4>
                    <p class="text-muted mb-0 small">
                        ${companySettings.company_address || ''}<br>
                        Phone: ${companySettings.company_phone || ''} | Email: ${companySettings.company_email || ''}
                        ${companySettings.tax_number ? `<br>TRN: ${companySettings.tax_number}` : ''}
                    </p>
                </div>
                <div class="col-6 text-end">
                    <h2 class="text-primary fw-bold mb-1">LOCAL PURCHASE ORDER</h2>
                    <p class="h5 mb-0 text-muted">LPO-${data.id.toString().padStart(5, '0')}</p>
                </div>
            </div>
        `;

        let itemsHtml = '';
        data.items.forEach((item, index) => {
            itemsHtml += `
                <tr>
                    <td>${index + 1}</td>
                    <td>${item.name_en}<br><small class="text-muted">${item.name_ar}</small></td>
                    <td class="text-center">${item.quantity}</td>
                    <td class="text-end">${parseFloat(item.unit_price).toFixed(3)}</td>
                    <td class="text-center">${parseFloat(item.vat_rate || 0).toFixed(2)}%</td>
                    <td class="text-end">${parseFloat(item.total_amount).toFixed(3)}</td>
                </tr>
            `;
        });

        content.innerHTML = `
            ${companyHeader}
            <hr>
            <div class="row mb-4">
                <div class="col-6">
                    <h6 class="text-uppercase text-muted fw-bold mb-3" data-en="Supplier" data-ar="المورد">Supplier</h6>
                    <p class="h6 mb-1 fw-bold">${data.supplier_name}</p>
                    <p class="small text-muted mb-0">
                        ${data.supplier_phone ? `Phone: ${data.supplier_phone}` : ''}
                    </p>
                </div>
                <div class="col-6 text-end">
                    <h6 class="text-uppercase text-muted fw-bold mb-3" data-en="Details" data-ar="تفاصيل">Details</h6>
                    <div class="d-flex justify-content-end mb-1">
                        <span class="text-muted me-2">Date:</span>
                        <span class="fw-bold">${data.lpo_date}</span>
                    </div>
                    <div class="d-flex justify-content-end mb-1">
                        <span class="text-muted me-2">Delivery:</span>
                        <span class="fw-bold">${data.delivery_date || '---'}</span>
                    </div>
                    <div class="d-flex justify-content-end">
                        <span class="text-muted me-2">Status:</span>
                        <span class="badge ${data.status === 'pending' ? 'bg-warning text-dark' : 'bg-success'}">${data.status.toUpperCase()}</span>
                    </div>
                </div>
            </div>
            <div class="table-responsive">
                <table class="table table-striped table-bordered">
                    <thead class="table-dark">
                        <tr>
                            <th style="width: 5%">#</th>
                            <th style="width: 45%" data-en="Description" data-ar="الوصف">Description</th>
                            <th style="width: 10%" class="text-center" data-en="Qty" data-ar="الكمية">Qty</th>
                            <th style="width: 15%" class="text-end">Unit Price</th>
                            <th style="width: 10%" class="text-center">VAT</th>
                            <th style="width: 15%" class="text-end" data-en="Total" data-ar="الإجمالي">Total</th>
                        </tr>
                    </thead>
                    <tbody>${itemsHtml}</tbody>
                    <tfoot class="table-light">
                        <tr>
                            <td colspan="5" class="text-end fw-bold" data-en="Subtotal" data-ar="الإجمالي الفرعي">Subtotal</td>
                            <td class="text-end fw-bold">OMR ${parseFloat(data.total_amount).toFixed(3)}</td>
                        </tr>
                        <tr>
                            <td colspan="5" class="text-end fw-bold">VAT Amount</td>
                            <td class="text-end fw-bold">OMR ${parseFloat(data.vat_amount).toFixed(2)}</td>
                        </tr>
                        <tr class="table-primary">
                            <td colspan="5" class="text-end fw-bold h5">Grand Total</td>
                            <td class="text-end fw-bold h5">OMR ${parseFloat(data.total_with_vat).toFixed(3)}</td>
                        </tr>
                    </tfoot>
                </table>
            </div>
            ${data.terms_conditions ? `
            <div class="card bg-light border-0 mt-4">
                <div class="card-body p-3">
                    <h6 class="fw-bold mb-2 small text-uppercase text-muted">Terms & Conditions</h6>
                    <p class="small mb-0">${data.terms_conditions.replace(/\n/g, '<br>')}</p>
                </div>
            </div>` : ''}
            
            <div class="row mt-5 pt-3">
                <div class="col-4 text-center">
                    <div style="border-top: 1px solid #dee2e6; padding-top: 10px;">
                        <p class="small mb-0">Prepared By</p>
                    </div>
                </div>
                <div class="col-4"></div>
                <div class="col-4 text-center">
                    <div style="border-top: 1px solid #dee2e6; padding-top: 10px;">
                        <p class="small mb-0">Authorized Signature</p>
                    </div>
                </div>
            </div>
        `;
        
        window.printLPO = function() {
            const printWindow = window.open('', '_blank');
            printWindow.document.write('<html><head><title>LPO-' + data.id + '</title>');
            printWindow.document.write('<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap<?= $dir === 'rtl' ? '.rtl' : '' ?>.min.css" rel="stylesheet">');
            printWindow.document.write('<style>body { padding: 40px; } @media print { .no-print { display: none; } }</style>');
            printWindow.document.write('</head><body>');
            printWindow.document.write(content.innerHTML);
            printWindow.document.write('</body></html>');
            printWindow.document.close();
            setTimeout(() => {
                printWindow.print();
                printWindow.close();
            }, 500);
        };
        
        modal.show();
    };

    // Quotation Form Logic
    initInvoiceForm('quotProductSearchInput', 'quotSearchSuggestions', 'quotItemsTableBody', 'quot_grand_display', 'quot_subtotal_display', 'quot_vat_display');
    initInvoiceForm('editQuotProductSearchInput', 'editQuotSearchSuggestions', 'editQuotItemsTableBody', 'edit_quot_grand_display', 'edit_quot_subtotal_display', 'edit_quot_vat_display');

    document.querySelectorAll('.edit-quotation-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const data = JSON.parse(this.dataset.json);
            document.getElementById('edit_quotation_id').value = data.id;
            document.getElementById('edit_quot_customer_id').value = data.customer_id;
            document.getElementById('edit_quot_date').value = data.quotation_date;
            document.getElementById('edit_quot_valid').value = data.valid_until || '';
            document.getElementById('edit_quot_status').value = data.status || 'pending';
            
            const tableBody = document.getElementById('editQuotItemsTableBody');
            tableBody.innerHTML = '';
            
            data.items.forEach(item => {
                addItemToTable({
                    id: item.item_id,
                    name_en: item.name_en,
                    name_ar: item.name_ar,
                    sku: '',
                    vat_rate: item.vat_rate || 0
                }, tableBody, null, null, 
                document.getElementById('edit_quot_grand_display'), 
                document.getElementById('edit_quot_subtotal_display'), 
                document.getElementById('edit_quot_vat_display'),
                { quantity: item.quantity, unit_price: item.unit_price });
            });
        });
    });

    document.querySelectorAll('.convert-quotation-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            if (confirm('Convert this quotation to an invoice? This will reduce stock.')) {
                const f = document.createElement('form');
                f.method = 'POST';
                f.innerHTML = `<input type="hidden" name="convert_to_invoice" value="1"><input type="hidden" name="quotation_id" value="${this.dataset.id}">`;
                document.body.appendChild(f);
                f.submit();
            }
        });
    });

    // View Quotation Logic
    window.viewAndPrintQuotation = function(data, autoPrint = false) {
        const modal = new bootstrap.Modal(document.getElementById('viewQuotationModal'));
        const content = document.getElementById('quotationPrintableArea');
        
        let itemsHtml = '';
        data.items.forEach((item, index) => {
            itemsHtml += `
                <tr>
                    <td>${index + 1}</td>
                    <td>${item.name_en}<br><small>${item.name_ar}</small></td>
                    <td class="text-center">${item.quantity}</td>
                    <td class="text-end">${parseFloat(item.unit_price).toFixed(3)}</td>
                    <td class="text-center">${parseFloat(item.vat_rate || 0).toFixed(2)}%</td>
                    <td class="text-end">${parseFloat(item.total_price).toFixed(3)}</td>
                </tr>
            `;
        });

        // Company Logo and Header Construction
        const logoUrl = companySettings.company_logo || '';
        const logoImg = logoUrl ? `<img src="${logoUrl}" alt="Logo" class="invoice-logo mb-3">` : '';
        const companyName = companySettings.company_name || 'Accounting System';
        const companyAddress = (companySettings.company_address || '').replace(/\n/g, '<br>');
        const companyVat = companySettings.vat_number ? `<p class="text-muted small mb-0">VAT: ${companySettings.vat_number}</p>` : '';
        const companyPhone = companySettings.company_phone ? `<p class="text-muted small mb-0">Tel: ${companySettings.company_phone}</p>` : '';

        // Quotation Header Construction
        const quotDate = data.quotation_date;
        const quotValid = data.valid_until || 'N/A';
        const quotNo = 'QUO-' + data.id.toString().padStart(5, '0');
        const customerName = data.customer_name || 'Walk-in Customer';
        const statusBadge = `<span class="badge ${data.status === 'converted' ? 'bg-success' : 'bg-secondary'}">${data.status.toUpperCase()}</span>`;

        content.innerHTML = `
            <div class="p-5">
                <div class="invoice-header mb-4">
                    <div class="row align-items-center">
                        <div class="col-6">
                            ${logoImg}
                            <h3 class="mb-1 fw-bold">${companyName}</h3>
                            <p class="text-muted small mb-0">${companyAddress}</p>
                            ${companyVat}
                            ${companyPhone}
                        </div>
                        <div class="col-6 text-end">
                            <h1 class="invoice-title fw-bold mb-0 text-uppercase">Quotation / عرض سعر</h1>
                            <div class="mt-2">${statusBadge}</div>
                            <div class="mt-3">
                                <p class="mb-0 fs-5">No / رقم: <strong class="text-primary">${quotNo}</strong></p>
                                <p class="mb-0">Date / التاريخ: <span class="fw-bold">${quotDate}</span></p>
                                <p class="mb-0">Valid Until / صالح لغاية: <span class="fw-bold">${quotValid}</span></p>
                            </div>
                        </div>
                    </div>
                </div>

                <div class="row mb-4 g-3">
                    <div class="col-6">
                        <div class="invoice-info-card">
                            <p class="text-muted small text-uppercase fw-bold mb-2 border-bottom pb-1">To / إلى</p>
                            <h5 class="mb-1 fw-bold">${customerName}</h5>
                        </div>
                    </div>
                </div>

                <table class="table table-bordered table-formal">
                    <thead class="bg-dark text-white">
                        <tr>
                            <th>#</th>
                            <th>Item Description / وصف الصنف</th>
                            <th class="text-center">Qty / الكمية</th>
                            <th class="text-end">Unit Price / سعر الوحدة</th>
                            <th class="text-center">VAT / الضريبة</th>
                            <th class="text-end">Total / الإجمالي</th>
                        </tr>
                    </thead>
                    <tbody>${itemsHtml}</tbody>
                    <tfoot>
                        <tr>
                            <th colspan="5" class="text-end">Subtotal / المجموع الفرعي</th>
                            <td class="text-end fw-bold">${parseFloat(data.total_amount).toFixed(3)}</td>
                        </tr>
                        <tr>
                            <th colspan="5" class="text-end">VAT Amount / مبلغ الضريبة</th>
                            <td class="text-end fw-bold">${parseFloat(data.vat_amount).toFixed(2)}</td>
                        </tr>
                        <tr class="table-primary">
                            <th colspan="5" class="text-end h5">Grand Total (OMR) / المجموع الكلي (رع)</th>
                            <td class="text-end h5 fw-bold">${parseFloat(data.total_with_vat).toFixed(3)}</td>
                        </tr>
                    </tfoot>
                </table>
                
                <div class="mt-5 pt-3 border-top">
                    <div class="row">
                        <div class="col-6">
                            <p class="small text-muted text-uppercase fw-bold">Terms & Conditions / الشروط والأحكام:</p>
                            <ul class="small text-muted">
                                <li>Quotation is valid until the date mentioned above. / عرض السعر صالح لغاية التاريخ المذكور أعلاه.</li>
                                <li>Prices are inclusive of VAT where applicable. / الأسعار تشمل ضريبة القيمة المضافة حيثما ينطبق ذلك.</li>
                            </ul>
                        </div>
                        <div class="col-6 text-end pt-4">
                            <div class="border-top d-inline-block px-5">Authorized Signature / التوقيع المعتمد</div>
                        </div>
                    </div>
                </div>
                <div class="mt-4 text-center">
                    <p class="text-muted x-small mb-0">Generated by / تم إنشاؤه بواسطة ${companyName}</p>
                </div>
            </div>
        `;
        
        const actionButtons = document.getElementById('quotationActionButtons');
        actionButtons.innerHTML = '';
        if (data.status === 'pending') {
            const convertBtn = document.createElement('button');
            convertBtn.className = 'btn btn-success me-2';
            convertBtn.innerHTML = '<i class="bi bi-receipt"></i> <span data-en="Convert to Invoice" data-ar="تحويل إلى فاتورة">Convert to Invoice</span>';
            convertBtn.onclick = function() {
                if (confirm('Convert this quotation to an invoice?')) {
                    const f = document.createElement('form');
                    f.method = 'POST';
                    f.innerHTML = `<input type="hidden" name="convert_to_invoice" value="1"><input type="hidden" name="quotation_id" value="${data.id}">`;
                    document.body.appendChild(f);
                    f.submit();
                }
            };
            actionButtons.appendChild(convertBtn);
            
            const editBtn = document.createElement('button');
            editBtn.className = 'btn btn-primary';
            editBtn.innerHTML = '<i class="bi bi-pencil-square"></i> <span data-en="Edit" data-ar="تعديل">Edit</span>';
            editBtn.onclick = function() {
                const editModal = new bootstrap.Modal(document.getElementById('editQuotationModal'));
                modal.hide();
                const originalEditBtn = document.querySelector(`.edit-quotation-btn[data-json*='"id":${data.id},']`) || 
                                       document.querySelector(`.edit-quotation-btn[data-json*='"id":${data.id}']`);
                if (originalEditBtn) originalEditBtn.click();
            };
            actionButtons.appendChild(editBtn);
        }
        
        modal.show();
        if (autoPrint) {
            setTimeout(() => { window.print(); }, 500);
        }
    };

    document.querySelectorAll('.view-quotation-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const data = JSON.parse(this.dataset.json);
            window.viewAndPrintQuotation(data, false);
        });
    });

    // Edit Invoice Logic
    document.querySelectorAll('.edit-invoice-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const data = JSON.parse(this.dataset.json);
            document.getElementById('edit_invoice_id').value = data.id;
            document.getElementById('edit_customer_id').value = data.customer_id;
            document.getElementById('edit_invoice_date').value = data.invoice_date;
            document.getElementById('edit_due_date').value = data.due_date || '';
            document.getElementById('edit_payment_type').value = data.payment_type || 'cash';
            document.getElementById('edit_status').value = data.status || 'unpaid';
            document.getElementById('edit_paid_amount').value = parseFloat(data.paid_amount || 0).toFixed(3);
            
            if (data.status === 'partially_paid') {
                document.getElementById('editPaidAmountContainer').style.display = 'block';
            } else {
                document.getElementById('editPaidAmountContainer').style.display = 'none';
            }
            
            const tableBody = document.getElementById('editInvoiceItemsTableBody');
            tableBody.innerHTML = '';
            
            data.items.forEach(item => {
                // We need more data than what's in invoice_items (like SKU and names, but we have them from the join in PHP)
                // The dataset-json already contains name_en, name_ar etc because of the PHP logic at line 1093
                const itemMeta = {
                    id: item.item_id,
                    name_en: item.name_en,
                    name_ar: item.name_ar,
                    sku: '', // Optional, or fetch if needed
                    vat_rate: 0 // Will be handled if we have it in the join
                };

                // Fetch current item details to get VAT rate if possible, or use stored if available
                // For simplicity, let's assume we want to use the item's current VAT rate or store it.
                // Looking at the join at line 1093, it doesn't fetch vat_rate. Let's fix that in PHP too.
                
                addItemToTable({
                    id: item.item_id,
                    name_en: item.name_en,
                    name_ar: item.name_ar,
                    sku: '',
                    vat_rate: item.vat_rate || 0 // We'll add this to PHP join
                }, tableBody, null, null, 
                document.getElementById('edit_grandTotal'), 
                document.getElementById('edit_subtotal'), 
                document.getElementById('edit_totalVat'),
                { quantity: item.quantity, unit_price: item.unit_price });
            });
        });
    });

    // View and Print Invoice Logic
    document.addEventListener('click', function(e) {
        if (e.target.closest('.view-invoice-btn')) {
            const btn = e.target.closest('.view-invoice-btn');
            const data = JSON.parse(btn.dataset.json);
            if (window.viewAndPrintA4Invoice) {
                window.viewAndPrintA4Invoice(data, false);
            }
        }
        if (e.target.closest('.print-a4-btn')) {
            const btn = e.target.closest('.print-a4-btn');
            const data = JSON.parse(btn.dataset.json);
            if (window.viewAndPrintA4Invoice) {
                window.viewAndPrintA4Invoice(data, true);
            }
        }
    });

    // Return Logic (General for Sales and Purchase)
    const setupReturnLogic = (selectId, containerId, tbodyId, totalDisplayId, submitBtnId, type = "sale") => {
        const select = document.getElementById(selectId);
        if (!select) return;

        const calculateTotal = function() {
            let total = 0;
            document.querySelectorAll('#' + tbodyId + ' tr').forEach(row => {
                const qtyInput = row.querySelector('.return-qty-input');
                if (!qtyInput) return;
                const qty = parseFloat(qtyInput.value) || 0;
                const price = parseFloat(qtyInput.dataset.price) || 0;
                const lineTotal = qty * price;
                const lineTotalDisplay = row.querySelector('.line-total');
                if (lineTotalDisplay) {
                    lineTotalDisplay.innerText = lineTotal.toFixed(3);
                }
                total += lineTotal;
            });
            const totalDisplay = document.getElementById(totalDisplayId);
            if (totalDisplay) {
                totalDisplay.innerText = 'OMR ' + total.toFixed(3);
            }
            const submitBtn = document.getElementById(submitBtnId);
            if (submitBtn) {
                submitBtn.disabled = total <= 0;
            }
        };

        const handleInvoiceChange = async function() {
            const invoiceId = select.value;
            const container = document.getElementById(containerId);
            const tbody = document.getElementById(tbodyId);
            const submitBtn = document.getElementById(submitBtnId);
            
            if (!invoiceId) {
                if (container) container.style.display = 'none';
                if (submitBtn) submitBtn.disabled = true;
                return;
            }

            if (tbody) {
                tbody.innerHTML = '<tr><td colspan="5" class="text-center"><div class="spinner-border spinner-border-sm text-primary"></div> <span data-en="Loading items..." data-ar="جاري تحميل الأصناف...">Loading items...</span></td></tr>';
            }
            if (container) container.style.display = 'block';

            try {
                const resp = await fetch(`index.php?action=get_invoice_items&invoice_id=${invoiceId}&type=${type}`);
                const items = await resp.json();
                
                if (tbody) {
                    tbody.innerHTML = '';
                    if (items.length === 0) {
                        tbody.innerHTML = '<tr><td colspan="5" class="text-center text-muted" data-en="No items found for this invoice." data-ar="لا توجد أصناف لهذه الفاتورة.">No items found for this invoice.</td></tr>';
                    } else {
                        let html = '';
                        items.forEach(item => {
                            html += `
                                <tr>
                                    <td>${item.name_en}<br><small class="text-muted">${item.sku}</small></td>
                                    <td>${parseFloat(item.quantity).toFixed(2)}</td>
                                    <td>
                                        <input type="number" name="quantities[]" class="form-control form-control-sm return-qty-input" 
                                            step="0.01" min="0" max="${item.quantity}" value="0" 
                                            data-price="${item.unit_price}">
                                        <input type="hidden" name="item_ids[]" value="${item.item_id}">
                                        <input type="hidden" name="prices[]" value="${item.unit_price}">
                                    </td>
                                    <td class="text-end">${parseFloat(item.unit_price).toFixed(3)}</td>
                                    <td class="text-end line-total">0.000</td>
                                </tr>
                            `;
                        });
                        tbody.innerHTML = html;
                    }
                }
                
                if (submitBtn) submitBtn.disabled = true;

                const qtyInputs = tbody.querySelectorAll('.return-qty-input');
                qtyInputs.forEach(input => {
                    ['input', 'change', 'keyup'].forEach(evt => input.addEventListener(evt, calculateTotal));
                });

                calculateTotal();
            } catch (e) {
                console.error(e);
                if (window.Swal) Swal.fire('Error', 'Failed to fetch invoice items', 'error');
            }
        };

        select.addEventListener('change', handleInvoiceChange);
        if (window.jQuery && jQuery.fn.select2) {
            $(select).on('select2:select change', handleInvoiceChange);
        }
    };

    setupReturnLogic('return_invoice_select', 'return_items_container', 'return_items_tbody', 'return_total_display', 'submit_return_btn', 'sale');
    setupReturnLogic('purchase_return_invoice_select', 'purchase_return_items_container', 'purchase_return_items_tbody', 'purchase_return_total_display', 'purchase_submit_return_btn', 'purchase');

    // Return Invoice Button from Sales/Purchases list
    document.querySelectorAll('.return-invoice-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const invoiceId = this.dataset.id;
            const targetModal = this.dataset.bsTarget;
            const selectId = targetModal === '#addSalesReturnModal' ? 'return_invoice_select' : 'purchase_return_invoice_select';
            const select = document.getElementById(selectId);
            if (select) {
                $(select).val(invoiceId).trigger('change');
            }
        });
    });

    // View Return Logic
    document.querySelectorAll('.view-return-btn').forEach(btn => {
        btn.addEventListener('click', async function() {
            const returnId = this.dataset.id;
            const type = '<?= $page === "purchase_returns" ? "purchase" : "sale" ?>';
            const modal = new bootstrap.Modal(document.getElementById('viewReturnDetailsModal'));
            
            try {
                const resp = await fetch(`index.php?action=get_return_details&return_id=${returnId}&type=${type}`);
                const data = await resp.json();
                
                if (data) {
                    document.getElementById('view_return_no').innerText = (type === 'purchase' ? 'PRET-' : 'SRET-') + String(data.id).padStart(5, '0');
                    document.getElementById('view_return_party').innerText = data.party_name;
                    document.getElementById('view_return_date').innerText = data.return_date;
                    const refId = data.purchase_id || data.invoice_id;
                    const refPrefix = type === 'purchase' ? 'PUR-' : 'INV-';
                    document.getElementById('view_return_invoice').innerText = refPrefix + String(refId).padStart(5, '0');
                    document.getElementById('view_return_total').innerText = 'OMR ' + parseFloat(data.total_amount).toFixed(3);
                    document.getElementById('view_return_notes').innerText = data.notes || 'No notes';
                    
                    let itemsHtml = '';
                    data.items.forEach(item => {
                        itemsHtml += `
                            <tr>
                                <td>${item.name_en}<br><small class="text-muted">${item.sku}</small></td>
                                <td class="text-center">${parseFloat(item.quantity).toFixed(2)}</td>
                                <td class="text-end">${parseFloat(item.unit_price).toFixed(3)}</td>
                                <td class="text-end">${parseFloat(item.total_price).toFixed(3)}</td>
                            </tr>
                        `;
                    });
                    document.getElementById('view_return_items_tbody').innerHTML = itemsHtml;
                    modal.show();
                }
            } catch (e) {
                console.error(e);
                Swal.fire('Error', 'Failed to fetch return details', 'error');
            }
        });
    });

    } catch (e) { console.error("JS Error in DOMContentLoaded:", e); }
});
</script>
    <!-- View Return Details Modal -->
    <div class="modal fade" id="viewReturnDetailsModal" tabindex="-1">
        <div class="modal-dialog modal-lg">
            <div class="modal-content text-start border-0 shadow">
                <div class="modal-header">
                    <h5 class="modal-title">Return Details <span id="view_return_no"></span></h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <div class="row mb-4">
                        <div class="col-6">
                            <label class="text-muted small d-block">Party Name</label>
                            <div id="view_return_party" class="fw-bold"></div>
                        </div>
                        <div class="col-3">
                            <label class="text-muted small d-block">Return Date</label>
                            <div id="view_return_date"></div>
                        </div>
                        <div class="col-3">
                            <label class="text-muted small d-block">Against Invoice</label>
                            <div id="view_return_invoice"></div>
                        </div>
                    </div>
                    <h6>Returned Items</h6>
                    <div class="table-responsive">
                        <table class="table table-sm table-bordered">
                            <thead class="bg-light">
                                <tr>
                                    <th>Item</th>
                                    <th class="text-center">Returned Qty</th>
                                    <th class="text-end">Unit Price</th>
                                    <th class="text-end">Total Price</th>
                                </tr>
                            </thead>
                            <tbody id="view_return_items_tbody"></tbody>
                            <tfoot>
                                <tr>
                                    <th colspan="3" class="text-end">Total Amount:</th>
                                    <th class="text-end fw-bold" id="view_return_total"></th>
                                </tr>
                            </tfoot>
                        </table>
                    </div>
                    <div class="mt-3">
                        <label class="text-muted small d-block">Notes</label>
                        <div id="view_return_notes" class="p-2 bg-light rounded"></div>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <?php if ($page === 'sales_returns' || $page === 'purchase_returns' || $page === 'sales' || $page === 'purchases'): ?>
    <div class="modal fade" id="addPurchaseReturnModal" tabindex="-1">
        <div class="modal-dialog modal-lg">
            <div class="modal-content text-start border-0 shadow">
                <div class="modal-header">
                    <h5 class="modal-title">Process Purchase Return</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <div class="row g-3 mb-4 text-start">
                            <div class="col-md-6">
                                <label class="form-label" data-en="Select Invoice" data-ar="اختر الفاتورة">Select Invoice</label>
                                <select name="invoice_id" id="purchase_return_invoice_select" class="form-select select2" required>
                                    <option value="">Choose Invoice...</option>
                                    <?php if (!empty($data['purchase_invoices'])): ?>
                                        <?php foreach ($data['purchase_invoices'] as $inv): ?>
                                        <option value="<?= $inv['id'] ?>">PUR-<?= str_pad((string)$inv['id'], 5, '0', STR_PAD_LEFT) ?> (<?= $inv['invoice_date'] ?>) - OMR <?= number_format((float)$inv['total_with_vat'], 3) ?></option>
                                        <?php endforeach; ?>
                                    <?php endif; ?>
                                </select>
                            </div>
                            <div class="col-md-6">
                                <label class="form-label">Return Date</label>
                                <input type="date" name="return_date" class="form-control" value="<?= date('Y-m-d') ?>" required>
                            </div>
                        </div>

                        <div id="purchase_return_items_container" style="display:none;" class="text-start">
                            <h6>Items for Return</h6>
                            <div class="table-responsive">
                                <table class="table table-sm table-bordered">
                                    <thead class="bg-light">
                                        <tr>
                                            <th>Item</th>
                                            <th>Purchased Qty</th>
                                            <th>Return Qty</th>
                                            <th>Price</th>
                                            <th data-en="Total" data-ar="الإجمالي">Total</th>
                                        </tr>
                                    </thead>
                                    <tbody id="purchase_return_items_tbody"></tbody>
                                    <tfoot>
                                        <tr>
                                            <th colspan="4" class="text-end">Total Return Amount:</th>
                                            <th class="text-end" id="purchase_return_total_display"><?= __('currency') ?> 0.000</th>
                                        </tr>
                                    </tfoot>
                                </table>
                            </div>
                            <div class="mb-3">
                                <label class="form-label">Notes / Reason for Return</label>
                                <textarea name="notes" class="form-control" rows="2"></textarea>
                            </div>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_purchase_return" class="btn btn-danger" id="purchase_submit_return_btn" disabled>Process Return</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
    <!-- Add Sales Return Modal -->
    <div class="modal fade" id="addSalesReturnModal" tabindex="-1">
        <div class="modal-dialog modal-lg">
            <div class="modal-content text-start border-0 shadow">
                <div class="modal-header">
                    <h5 class="modal-title">Process Sales Return</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <div class="row g-3 mb-4 text-start">
                            <div class="col-md-6">
                                <label class="form-label" data-en="Select Invoice" data-ar="اختر الفاتورة">Select Invoice</label>
                                <select name="invoice_id" id="return_invoice_select" class="form-select select2" required>
                                    <option value="">Choose Invoice...</option>
                                    <?php if (!empty($data['sales_invoices'])): ?>
                                        <?php foreach ($data['sales_invoices'] as $inv): ?>
                                        <option value="<?= $inv['id'] ?>">INV-<?= str_pad((string)$inv['id'], 5, '0', STR_PAD_LEFT) ?> (<?= $inv['invoice_date'] ?>) - OMR <?= number_format((float)$inv['total_with_vat'], 3) ?></option>
                                        <?php endforeach; ?>
                                    <?php endif; ?>
                                </select>
                            </div>
                            <div class="col-md-6">
                                <label class="form-label">Return Date</label>
                                <input type="date" name="return_date" class="form-control" value="<?= date('Y-m-d') ?>" required>
                            </div>
                        </div>

                        <div id="return_items_container" style="display:none;" class="text-start">
                            <h6>Items for Return</h6>
                            <div class="table-responsive">
                                <table class="table table-sm table-bordered">
                                    <thead class="bg-light">
                                        <tr>
                                            <th>Item</th>
                                            <th>Sold Qty</th>
                                            <th>Return Qty</th>
                                            <th>Price</th>
                                            <th data-en="Total" data-ar="الإجمالي">Total</th>
                                        </tr>
                                    </thead>
                                    <tbody id="return_items_tbody"></tbody>
                                    <tfoot>
                                        <tr>
                                            <th colspan="4" class="text-end">Total Return Amount:</th>
                                            <th class="text-end" id="return_total_display"><?= __('currency') ?> 0.000</th>
                                        </tr>
                                    </tfoot>
                                </table>
                            </div>
                            <div class="mb-3">
                                <label class="form-label">Notes / Reason for Return</label>
                                <textarea name="notes" class="form-control" rows="2"></textarea>
                            </div>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_sales_return" class="btn btn-danger" id="submit_return_btn" disabled>Process Return</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
    <?php endif; ?>

        <!-- Add Account Modal -->
    <div class="modal fade" id="addAccountModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content border-0 shadow">
                <div class="modal-header">
                    <h5 class="modal-title" data-en="Add New Account" data-ar="إضافة حساب جديد">Add New Account</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <div class="form-grid-3">
                            <div class="col-md-4">
                                <label class="form-label" data-en="Code" data-ar="الكود">Code</label>
                                <input type="text" name="code" class="form-control" required placeholder="e.g. 1101">
                            </div>
                            <div class="col-md-8">
                                <label class="form-label" data-en="Name (EN)" data-ar="الاسم (إنجليزي)">Name (EN)</label>
                                <input type="text" name="name_en" class="form-control" required>
                            </div>
                            <div class="col-md-12">
                                <label class="form-label" data-en="Name (AR)" data-ar="الاسم (عربي)">Name (AR)</label>
                                <input type="text" name="name_ar" class="form-control" required>
                            </div>
                            <div class="col-md-6">
                                <label class="form-label" data-en="Type" data-ar="النوع">Type</label>
                                <select name="type" class="form-select" required>
                                    <option value="asset">Asset</option>
                                    <option value="liability">Liability</option>
                                    <option value="equity">Equity</option>
                                    <option value="revenue">Revenue</option>
                                    <option value="expense">Expense</option>
                                </select>
                            </div>
                            <div class="col-md-6">
                                <label class="form-label" data-en="Parent Account" data-ar="الحساب الأب">Parent Account</label>
                                <select name="parent_id" class="form-select">
                                    <option value="">--- None ---</option>
                                    <?php foreach ($data['accounts'] as $acc): ?>
                                    <option value="<?= $acc['id'] ?>"><?= $acc['code'] ?> - <?= htmlspecialchars($acc['name_en']) ?></option>
                                    <?php endforeach; ?>
                                </select>
                            </div>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_account" class="btn btn-primary">Save Account</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <!-- Add Manual Journal Modal -->
    <div class="modal fade" id="addManualJournalModal" tabindex="-1">
        <div class="modal-dialog modal-lg">
            <div class="modal-content border-0 shadow">
                <div class="modal-header bg-success text-white">
                    <h5 class="modal-title" data-en="New Manual Journal Entry" data-ar="قيد يومية يدوي جديد">New Manual Journal Entry</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <div class="row g-3 mb-4">
                            <div class="col-md-4">
                                <label class="form-label" data-en="Entry Date" data-ar="تاريخ القيد">Entry Date</label>
                                <input type="date" name="entry_date" class="form-control" value="<?= date('Y-m-d') ?>" required>
                            </div>
                            <div class="col-md-8">
                                <label class="form-label" data-en="Description" data-ar="الوصف">Description</label>
                                <input type="text" name="description" class="form-control" required placeholder="e.g. Opening Balance or Adjustment">
                            </div>
                            <div class="col-md-4">
                                <label class="form-label" data-en="Reference" data-ar="المرجع">Reference</label>
                                <input type="text" name="reference" class="form-control" placeholder="e.g. JV-001">
                            </div>
                        </div>

                        <h6>Journal Details</h6>
                        <div class="table-responsive">
                            <table class="table table-bordered">
                                <thead class="bg-light">
                                    <tr>
                                        <th style="width: 50%;">Account</th>
                                        <th style="width: 20%;">Debit</th>
                                        <th style="width: 20%;">Credit</th>
                                        <th style="width: 10%;"></th>
                                    </tr>
                                </thead>
                                <tbody id="manualJournalBody">
                                    <tr class="journal-row">
                                        <td>
                                            <select name="codes[]" class="form-select select2-journal" required>
                                                <option value="">--- Select Account ---</option>
                                                <?php foreach ($data['accounts'] as $acc): ?>
                                                <option value="<?= $acc['code'] ?>"><?= $acc['code'] ?> - <?= htmlspecialchars($acc['name_en']) ?></option>
                                                <?php endforeach; ?>
                                            </select>
                                        </td>
                                        <td><input type="number" step="0.001" name="debits[]" class="form-control journal-debit" value="0.000"></td>
                                        <td><input type="number" step="0.001" name="credits[]" class="form-control journal-credit" value="0.000"></td>
                                        <td></td>
                                    </tr>
                                    <tr class="journal-row">
                                        <td>
                                            <select name="codes[]" class="form-select select2-journal" required>
                                                <option value="">--- Select Account ---</option>
                                                <?php foreach ($data['accounts'] as $acc): ?>
                                                <option value="<?= $acc['code'] ?>"><?= $acc['code'] ?> - <?= htmlspecialchars($acc['name_en']) ?></option>
                                                <?php endforeach; ?>
                                            </select>
                                        </td>
                                        <td><input type="number" step="0.001" name="debits[]" class="form-control journal-debit" value="0.000"></td>
                                        <td><input type="number" step="0.001" name="credits[]" class="form-control journal-credit" value="0.000"></td>
                                        <td></td>
                                    </tr>
                                </tbody>
                                <tfoot>
                                    <tr>
                                        <td colspan="4">
                                            <button type="button" class="btn btn-outline-primary btn-sm" onclick="addJournalRow()">
                                                <i class="bi bi-plus-lg"></i> Add Row
                                            </button>
                                        </td>
                                    </tr>
                                    <tr class="table-light fw-bold">
                                        <td class="text-end" data-en="Total" data-ar="الإجمالي">Total</td>
                                        <td id="totalDebitDisplay">0.000</td>
                                        <td id="totalCreditDisplay">0.000</td>
                                        <td></td>
                                    </tr>
                                </tfoot>
                            </table>
                        </div>
                        <div id="journalBalanceWarning" class="alert alert-danger py-2 mt-2" style="display:none;">
                            <small><i class="bi bi-exclamation-triangle"></i> Journal is not balanced! Difference: <span id="journalDifference">0.000</span></small>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_manual_journal" id="saveJournalBtn" class="btn btn-primary" data-en="Save Entry" data-ar="حفظ القيد" disabled>Save Entry</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <script>
    function addJournalRow() {
        const tbody = document.getElementById('manualJournalBody');
        const row = document.createElement('tr');
        row.className = 'journal-row';
        row.innerHTML = `
            <td>
                <select name="codes[]" class="form-select select2-journal" required>
                    <option value="">--- Select Account ---</option>
                    <?php foreach ($data['accounts'] as $acc): ?>
                    <option value="<?= $acc['code'] ?>"><?= $acc['code'] ?> - <?= htmlspecialchars($acc['name_en']) ?></option>
                    <?php endforeach; ?>
                </select>
            </td>
            <td><input type="number" step="0.001" name="debits[]" class="form-control journal-debit" value="0.000"></td>
            <td><input type="number" step="0.001" name="credits[]" class="form-control journal-credit" value="0.000"></td>
            <td class="text-center">
                <button type="button" class="btn btn-link text-danger p-0" onclick="this.closest('tr').remove(); calculateJournalBalance();">
                    <i class="bi bi-trash"></i>
                </button>
            </td>
        `;
        tbody.appendChild(row);
        
        // Init Select2 for new row
        $(row).find('.select2-journal').select2({
            width: '100%',
            dropdownParent: $('#addManualJournalModal')
        });
        
        attachJournalListeners(row);
    }

    function attachJournalListeners(row) {
        row.querySelectorAll('input').forEach(input => {
            input.addEventListener('input', calculateJournalBalance);
        });
    }

    function calculateJournalBalance() {
        let totalDebit = 0;
        let totalCredit = 0;
        document.querySelectorAll('.journal-row').forEach(row => {
            totalDebit += parseFloat(row.querySelector('.journal-debit').value) || 0;
            totalCredit += parseFloat(row.querySelector('.journal-credit').value) || 0;
        });

        document.getElementById('totalDebitDisplay').innerText = totalDebit.toFixed(3);
        document.getElementById('totalCreditDisplay').innerText = totalCredit.toFixed(3);

        const diff = Math.abs(totalDebit - totalCredit);
        const isBalanced = diff < 0.001 && (totalDebit > 0 || totalCredit > 0);
        
        document.getElementById('saveJournalBtn').disabled = !isBalanced;
        
        const warning = document.getElementById('journalBalanceWarning');
        if (diff >= 0.001) {
            warning.style.display = 'block';
            document.getElementById('journalDifference').innerText = diff.toFixed(3);
        } else {
            warning.style.display = 'none';
        }
    }

    document.addEventListener('DOMContentLoaded', function() {
        document.querySelectorAll('.journal-row').forEach(attachJournalListeners);
        $('.select2-journal').select2({
            width: '100%',
            dropdownParent: $('#addManualJournalModal')
        });
    });
    </script>

    <!-- View Invoice Modal -->
    <!-- Add Invoice Modal -->
    <div class="modal fade" id="addInvoiceModal" tabindex="-1">
        <div class="modal-dialog modal-xl">
            <div class="modal-content border-0 shadow">
                <div class="modal-header bg-primary text-white">
                    <h5 class="modal-title" data-en="Create New Tax Invoice" data-ar="إنشاء فاتورة ضريبية جديدة">Create New Tax Invoice</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <input type="hidden" name="type" value="<?= $page === 'sales' ? 'sale' : 'purchase' ?>">
                    <div class="modal-body p-4">
                        <div class="row g-3 mb-4">
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="<?= $page === 'sales' ? 'Customer' : 'Supplier' ?>" data-ar="<?= $page === 'sales' ? 'العميل' : 'المورد' ?>"><?= $page === 'sales' ? 'Customer' : 'Supplier' ?></label>
                                <select name="customer_id" class="form-select select2" required>
                                    <option value="">---</option>
                                    <?php foreach ($data['customers_list'] as $c): ?>
                                    <option value="<?= $c['id'] ?>"><?= htmlspecialchars($c['name']) ?></option>
                                    <?php endforeach; ?>
                                </select>
                            </div>
                            <div class="col-md-2">
                                <label class="form-label fw-bold" data-en="Date" data-ar="التاريخ">Date</label>
                                <input type="date" name="invoice_date" class="form-control" value="<?= date('Y-m-d') ?>" required>
                            </div>
                            <div class="col-md-2">
                                <label class="form-label fw-bold" data-en="Due Date" data-ar="تاريخ الاستحقاق">Due Date</label>
                                <input type="date" name="due_date" class="form-control">
                            </div>
                            <div class="col-md-2">
                                <label class="form-label fw-bold" data-en="Payment Type" data-ar="طريقة الدفع">Payment Type</label>
                                <select name="payment_type" class="form-select">
                                    <option value="cash">Cash</option>
                                    <option value="card">Credit Card</option>
                                    <option value="bank_transfer">Bank Transfer</option>
                                    <option value="credit">Credit</option>
                                </select>
                            </div>
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="Status" data-ar="الحالة">Status</label>
                                <select name="status" id="add_status" class="form-select">
                                    <option value="unpaid">Unpaid</option>
                                    <option value="partially_paid">Partially Paid</option>
                                    <option value="paid">Paid</option>
                                </select>
                            </div>
                            <div class="col-md-3" id="addPaidAmountContainer" style="display: none;">
                                <label class="form-label fw-bold" data-en="Paid Amount" data-ar="المبلغ المدفوع">Paid Amount</label>
                                <input type="number" step="0.001" name="paid_amount" class="form-control" value="0.000">
                            </div>
                        </div>

                        <div class="card mb-4">
                            <div class="card-body bg-light">
                                <label class="form-label fw-bold" data-en="Search Items" data-ar="بحث عن أصناف">Search Items</label>
                                <div class="position-relative">
                                    <input type="text" id="productSearchInput" class="form-control" placeholder="Search by name or SKU..." autocomplete="off">
                                    <div id="searchSuggestions" class="list-group position-absolute w-100 shadow-sm" style="display: none; z-index: 1000;"></div>
                                </div>
                            </div>
                        </div>

                        <div class="table-responsive">
                            <table class="table table-bordered align-middle">
                                <thead class="bg-light">
                                    <tr>
                                        <th style="width: 40%;" data-en="Item Details" data-ar="تفاصيل الصنف">Item Details</th>
                                        <th style="width: 15%;" data-en="Qty" data-ar="الكمية">Qty</th>
                                        <th style="width: 15%;" data-en="Unit Price" data-ar="سعر الوحدة">Unit Price</th>
                                        <th style="width: 10%;" data-en="VAT" data-ar="الضريبة">VAT</th>
                                        <th style="width: 15%;" data-en="Total" data-ar="الإجمالي">Total</th>
                                        <th style="width: 5%;"></th>
                                    </tr>
                                </thead>
                                <tbody id="invoiceItemsTableBody"></tbody>
                                <tfoot>
                                    <tr>
                                        <td colspan="4" class="text-end fw-bold" data-en="Subtotal" data-ar="الإجمالي الفرعي">Subtotal</td>
                                        <td class="text-end fw-bold" id="subtotal"><?= __('currency') ?> 0.000</td>
                                        <td></td>
                                    </tr>
                                    <tr>
                                        <td colspan="4" class="text-end fw-bold" data-en="Total VAT" data-ar="إجمالي الضريبة">Total VAT</td>
                                        <td class="text-end fw-bold" id="totalVat"><?= __('currency') ?> 0.000</td>
                                        <td></td>
                                    </tr>
                                    <tr class="table-primary">
                                        <td colspan="4" class="text-end fw-bold h5" data-en="Grand Total" data-ar="الإجمالي النهائي">Grand Total</td>
                                        <td class="text-end fw-bold h5" id="grandTotal"><?= __('currency') ?> 0.000</td>
                                        <td></td>
                                    </tr>
                                </tfoot>
                            </table>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_invoice" class="btn btn-primary" data-en="Create Invoice" data-ar="إنشاء الفاتورة">Create Invoice</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <!-- Edit Invoice Modal -->
    <div class="modal fade" id="editInvoiceModal" tabindex="-1">
        <div class="modal-dialog modal-xl">
            <div class="modal-content border-0 shadow">
                <div class="modal-header bg-primary text-white">
                    <h5 class="modal-title" data-en="Edit Invoice" data-ar="تعديل الفاتورة">Edit Invoice</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <input type="hidden" name="invoice_id" id="edit_invoice_id">
                    <div class="modal-body p-4">
                        <div class="row g-3 mb-4">
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="<?= $page === 'sales' ? 'Customer' : 'Supplier' ?>" data-ar="<?= $page === 'sales' ? 'العميل' : 'المورد' ?>"><?= $page === 'sales' ? 'Customer' : 'Supplier' ?></label>
                                <select name="customer_id" id="edit_customer_id" class="form-select select2" required>
                                    <option value="">---</option>
                                    <?php foreach ($data['customers_list'] as $c): ?>
                                    <option value="<?= $c['id'] ?>"><?= htmlspecialchars($c['name']) ?></option>
                                    <?php endforeach; ?>
                                </select>
                            </div>
                            <div class="col-md-2">
                                <label class="form-label fw-bold" data-en="Date" data-ar="التاريخ">Date</label>
                                <input type="date" name="invoice_date" id="edit_invoice_date" class="form-control" required>
                            </div>
                            <div class="col-md-2">
                                <label class="form-label fw-bold" data-en="Due Date" data-ar="تاريخ الاستحقاق">Due Date</label>
                                <input type="date" name="due_date" id="edit_due_date" class="form-control">
                            </div>
                            <div class="col-md-2">
                                <label class="form-label fw-bold" data-en="Payment Type" data-ar="طريقة الدفع">Payment Type</label>
                                <select name="payment_type" id="edit_payment_type" class="form-select">
                                    <option value="cash">Cash</option>
                                    <option value="card">Credit Card</option>
                                    <option value="bank_transfer">Bank Transfer</option>
                                    <option value="credit">Credit</option>
                                </select>
                            </div>
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="Status" data-ar="الحالة">Status</label>
                                <select name="status" id="edit_status" class="form-select">
                                    <option value="unpaid">Unpaid</option>
                                    <option value="partially_paid">Partially Paid</option>
                                    <option value="paid">Paid</option>
                                </select>
                            </div>
                            <div class="col-md-3" id="editPaidAmountContainer" style="display: none;">
                                <label class="form-label fw-bold" data-en="Paid Amount" data-ar="المبلغ المدفوع">Paid Amount</label>
                                <input type="number" step="0.001" name="paid_amount" id="edit_paid_amount" class="form-control">
                            </div>
                        </div>

                        <div class="card mb-4">
                            <div class="card-body bg-light">
                                <label class="form-label fw-bold" data-en="Search Items" data-ar="بحث عن أصناف">Search Items</label>
                                <div class="position-relative">
                                    <input type="text" id="editProductSearchInput" class="form-control" placeholder="Search by name or SKU..." autocomplete="off">
                                    <div id="editSearchSuggestions" class="list-group position-absolute w-100 shadow-sm" style="display: none; z-index: 1000;"></div>
                                </div>
                            </div>
                        </div>

                        <div class="table-responsive">
                            <table class="table table-bordered align-middle">
                                <thead class="bg-light">
                                    <tr>
                                        <th style="width: 40%;" data-en="Item Details" data-ar="تفاصيل الصنف">Item Details</th>
                                        <th style="width: 15%;" data-en="Qty" data-ar="الكمية">Qty</th>
                                        <th style="width: 15%;" data-en="Unit Price" data-ar="سعر الوحدة">Unit Price</th>
                                        <th style="width: 10%;" data-en="VAT" data-ar="الضريبة">VAT</th>
                                        <th style="width: 15%;" data-en="Total" data-ar="الإجمالي">Total</th>
                                        <th style="width: 5%;"></th>
                                    </tr>
                                </thead>
                                <tbody id="editInvoiceItemsTableBody"></tbody>
                                <tfoot>
                                    <tr>
                                        <td colspan="4" class="text-end fw-bold" data-en="Subtotal" data-ar="الإجمالي الفرعي">Subtotal</td>
                                        <td class="text-end fw-bold" id="edit_subtotal"><?= __('currency') ?> 0.000</td>
                                        <td></td>
                                    </tr>
                                    <tr>
                                        <td colspan="4" class="text-end fw-bold" data-en="Total VAT" data-ar="إجمالي الضريبة">Total VAT</td>
                                        <td class="text-end fw-bold" id="edit_totalVat"><?= __('currency') ?> 0.000</td>
                                        <td></td>
                                    </tr>
                                    <tr class="table-primary">
                                        <td colspan="4" class="text-end fw-bold h5" data-en="Grand Total" data-ar="الإجمالي النهائي">Grand Total</td>
                                        <td class="text-end fw-bold h5" id="edit_grandTotal"><?= __('currency') ?> 0.000</td>
                                        <td></td>
                                    </tr>
                                </tfoot>
                            </table>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="edit_invoice" class="btn btn-primary" data-en="Update Invoice" data-ar="تحديث الفاتورة">Update Invoice</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <!-- Add Quotation Modal -->
    <!-- Add LPO Modal -->
    <div class="modal fade" id="addLpoModal" tabindex="-1">
        <div class="modal-dialog modal-xl">
            <div class="modal-content border-0 shadow">
                <div class="modal-header bg-primary text-white">
                    <h5 class="modal-title" data-en="Create New LPO" data-ar="إنشاء أمر شراء جديد">Create New LPO</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body p-4">
                        <div class="row g-3 mb-4">
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="Supplier" data-ar="المورد">Supplier</label>
                                <select name="supplier_id" class="form-select select2" required>
                                    <option value="">---</option>
                                    <?php foreach ($data['suppliers'] as $s): ?>
                                    <option value="<?= $s['id'] ?>"><?= htmlspecialchars($s['name']) ?></option>
                                    <?php endforeach; ?>
                                </select>
                            </div>
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="Date" data-ar="التاريخ">Date</label>
                                <input type="date" name="lpo_date" class="form-control" value="<?= date('Y-m-d') ?>" required>
                            </div>
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="Delivery Date" data-ar="تاريخ التسليم">Delivery Date</label>
                                <input type="date" name="delivery_date" class="form-control">
                            </div>
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="Terms & Conditions" data-ar="الشروط والأحكام">Terms & Conditions</label>
                                <textarea name="terms_conditions" class="form-control" rows="1"></textarea>
                            </div>
                        </div>

                        <div class="card mb-4">
                            <div class="card-body bg-light">
                                <label class="form-label fw-bold" data-en="Search Items" data-ar="بحث عن أصناف">Search Items</label>
                                <div class="position-relative">
                                    <input type="text" id="lpoProductSearchInput" class="form-control" placeholder="Search by name or SKU..." autocomplete="off">
                                    <div id="lpoSearchSuggestions" class="list-group position-absolute w-100 shadow-sm" style="display: none; z-index: 1000;"></div>
                                </div>
                            </div>
                        </div>

                        <div class="table-responsive">
                            <table class="table table-bordered align-middle">
                                <thead class="bg-light">
                                    <tr>
                                        <th style="width: 40%;" data-en="Item Details" data-ar="تفاصيل الصنف">Item Details</th>
                                        <th style="width: 15%;" data-en="Qty" data-ar="الكمية">Qty</th>
                                        <th style="width: 15%;" data-en="Unit Price" data-ar="سعر الوحدة">Unit Price</th>
                                        <th style="width: 10%;" data-en="VAT" data-ar="الضريبة">VAT</th>
                                        <th style="width: 15%;" data-en="Total" data-ar="الإجمالي">Total</th>
                                        <th style="width: 5%;"></th>
                                    </tr>
                                </thead>
                                <tbody id="lpoItemsTableBody"></tbody>
                                <tfoot>
                                    <tr>
                                        <td colspan="4" class="text-end fw-bold" data-en="Subtotal" data-ar="الإجمالي الفرعي">Subtotal</td>
                                        <td class="text-end fw-bold" id="lpo_subtotal_display"><?= __('currency') ?> 0.000</td>
                                    </tr>
                                    <tr>
                                        <td colspan="4" class="text-end fw-bold" data-en="Total VAT" data-ar="إجمالي الضريبة">Total VAT</td>
                                        <td class="text-end fw-bold" id="lpo_vat_display"><?= __('currency') ?> 0.000</td>
                                    </tr>
                                    <tr class="table-primary">
                                        <td colspan="4" class="text-end fw-bold h5" data-en="Grand Total" data-ar="الإجمالي النهائي">Grand Total</td>
                                        <td class="text-end fw-bold h5" id="lpo_grand_display"><?= __('currency') ?> 0.000</td>
                                    </tr>
                                </tfoot>
                            </table>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_lpo" class="btn btn-primary" data-en="Create LPO" data-ar="إنشاء أمر الشراء">Create LPO</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <!-- Edit LPO Modal -->
    <div class="modal fade" id="editLpoModal" tabindex="-1">
        <div class="modal-dialog modal-xl">
            <div class="modal-content border-0 shadow">
                <div class="modal-header bg-primary text-white">
                    <h5 class="modal-title" data-en="Edit LPO" data-ar="تعديل أمر الشراء">Edit LPO</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <input type="hidden" name="lpo_id" id="edit_lpo_id">
                    <div class="modal-body p-4">
                        <div class="row g-3 mb-4">
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="Supplier" data-ar="المورد">Supplier</label>
                                <select name="supplier_id" id="edit_lpo_supplier_id" class="form-select select2" required>
                                    <option value="">---</option>
                                    <?php foreach ($data['suppliers'] as $s): ?>
                                    <option value="<?= $s['id'] ?>"><?= htmlspecialchars($s['name']) ?></option>
                                    <?php endforeach; ?>
                                </select>
                            </div>
                            <div class="col-md-2">
                                <label class="form-label fw-bold" data-en="Date" data-ar="التاريخ">Date</label>
                                <input type="date" name="lpo_date" id="edit_lpo_date" class="form-control" required>
                            </div>
                            <div class="col-md-2">
                                <label class="form-label fw-bold" data-en="Delivery Date" data-ar="تاريخ التسليم">Delivery Date</label>
                                <input type="date" name="delivery_date" id="edit_lpo_delivery_date" class="form-control">
                            </div>
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="Status" data-ar="الحالة">Status</label>
                                <select name="status" id="edit_lpo_status" class="form-select">
                                    <option value="pending">Pending</option>
                                    <option value="converted">Converted</option>
                                    <option value="cancelled">Cancelled</option>
                                </select>
                            </div>
                            <div class="col-md-12">
                                <label class="form-label fw-bold" data-en="Terms" data-ar="الشروط">Terms</label>
                                <textarea name="terms_conditions" id="edit_lpo_terms" class="form-control" rows="1"></textarea>
                            </div>
                        </div>

                        <div class="card mb-4">
                            <div class="card-body bg-light">
                                <label class="form-label fw-bold" data-en="Search Items" data-ar="بحث عن أصناف">Search Items</label>
                                <div class="position-relative">
                                    <input type="text" id="editLpoProductSearchInput" class="form-control" placeholder="Search by name or SKU..." autocomplete="off">
                                    <div id="editLpoSearchSuggestions" class="list-group position-absolute w-100 shadow-sm" style="display: none; z-index: 1000;"></div>
                                </div>
                            </div>
                        </div>

                        <div class="table-responsive">
                            <table class="table table-bordered align-middle">
                                <thead class="bg-light">
                                    <tr>
                                        <th style="width: 40%;" data-en="Item Details" data-ar="تفاصيل الصنف">Item Details</th>
                                        <th style="width: 15%;" data-en="Qty" data-ar="الكمية">Qty</th>
                                        <th style="width: 15%;" data-en="Unit Price" data-ar="سعر الوحدة">Unit Price</th>
                                        <th style="width: 10%;" data-en="VAT" data-ar="الضريبة">VAT</th>
                                        <th style="width: 15%;" data-en="Total" data-ar="الإجمالي">Total</th>
                                        <th style="width: 5%;"></th>
                                    </tr>
                                </thead>
                                <tbody id="editLpoItemsTableBody"></tbody>
                                <tfoot>
                                    <tr>
                                        <td colspan="4" class="text-end fw-bold" data-en="Subtotal" data-ar="الإجمالي الفرعي">Subtotal</td>
                                        <td class="text-end fw-bold" id="edit_lpo_subtotal_display"><?= __('currency') ?> 0.000</td>
                                    </tr>
                                    <tr>
                                        <td colspan="4" class="text-end fw-bold" data-en="Total VAT" data-ar="إجمالي الضريبة">Total VAT</td>
                                        <td class="text-end fw-bold" id="edit_lpo_vat_display"><?= __('currency') ?> 0.000</td>
                                    </tr>
                                    <tr class="table-primary">
                                        <td colspan="4" class="text-end fw-bold h5" data-en="Grand Total" data-ar="الإجمالي النهائي">Grand Total</td>
                                        <td class="text-end fw-bold h5" id="edit_lpo_grand_display"><?= __('currency') ?> 0.000</td>
                                    </tr>
                                </tfoot>
                            </table>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="edit_lpo" class="btn btn-primary" data-en="Update LPO" data-ar="تحديث أمر الشراء">Update LPO</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <!-- View LPO Modal -->
    <div class="modal fade" id="viewLpoModal" tabindex="-1">
        <div class="modal-dialog modal-lg">
            <div class="modal-content border-0 shadow">
                <div class="modal-header bg-info text-white">
                    <h5 class="modal-title">LPO Details</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body p-4" id="lpoDetailsContent">
                    <!-- Loaded via JS -->
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal" data-en="Close" data-ar="إغلاق">Close</button>
                    <button type="button" class="btn btn-primary" onclick="window.printLPO()">Print LPO</button>
                </div>
            </div>
        </div>
    </div>

    <div class="modal fade" id="addQuotationModal" tabindex="-1">
        <div class="modal-dialog modal-xl">
            <div class="modal-content border-0 shadow">
                <div class="modal-header bg-primary text-white">
                    <h5 class="modal-title" data-en="Create New Quotation" data-ar="إنشاء عرض سعر جديد">Create New Quotation</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body p-4">
                        <div class="row g-3 mb-4">
                            <div class="col-md-4">
                                <label class="form-label fw-bold" data-en="Customer" data-ar="العميل">Customer</label>
                                <select name="customer_id" class="form-select select2" required>
                                    <option value="">---</option>
                                    <?php foreach ($data['customers_list'] as $c): ?>
                                    <option value="<?= $c['id'] ?>"><?= htmlspecialchars($c['name']) ?></option>
                                    <?php endforeach; ?>
                                </select>
                            </div>
                            <div class="col-md-4">
                                <label class="form-label fw-bold" data-en="Date" data-ar="التاريخ">Date</label>
                                <input type="date" name="quotation_date" class="form-control" value="<?= date('Y-m-d') ?>" required>
                            </div>
                            <div class="col-md-4">
                                <label class="form-label fw-bold" data-en="Valid Until" data-ar="صالح حتى">Valid Until</label>
                                <input type="date" name="valid_until" class="form-control">
                            </div>
                        </div>

                        <div class="card mb-4">
                            <div class="card-body bg-light">
                                <label class="form-label fw-bold" data-en="Search Items" data-ar="بحث عن أصناف">Search Items</label>
                                <div class="position-relative">
                                    <input type="text" id="quotProductSearchInput" class="form-control" placeholder="Search by name or SKU..." autocomplete="off">
                                    <div id="quotSearchSuggestions" class="list-group position-absolute w-100 shadow-sm" style="display: none; z-index: 1000;"></div>
                                </div>
                            </div>
                        </div>

                        <div class="table-responsive">
                            <table class="table table-bordered align-middle">
                                <thead class="bg-light">
                                    <tr>
                                        <th style="width: 40%;" data-en="Item Details" data-ar="تفاصيل الصنف">Item Details</th>
                                        <th style="width: 15%;" data-en="Qty" data-ar="الكمية">Qty</th>
                                        <th style="width: 15%;" data-en="Unit Price" data-ar="سعر الوحدة">Unit Price</th>
                                        <th style="width: 10%;" data-en="VAT" data-ar="الضريبة">VAT</th>
                                        <th style="width: 15%;" data-en="Total" data-ar="الإجمالي">Total</th>
                                        <th style="width: 5%;"></th>
                                    </tr>
                                </thead>
                                <tbody id="quotItemsTableBody"></tbody>
                                <tfoot>
                                    <tr>
                                        <td colspan="4" class="text-end fw-bold" data-en="Subtotal" data-ar="الإجمالي الفرعي">Subtotal</td>
                                        <td class="text-end fw-bold" id="quot_subtotal_display"><?= __('currency') ?> 0.000</td>
                                    </tr>
                                    <tr>
                                        <td colspan="4" class="text-end fw-bold" data-en="Total VAT" data-ar="إجمالي الضريبة">Total VAT</td>
                                        <td class="text-end fw-bold" id="quot_vat_display"><?= __('currency') ?> 0.000</td>
                                    </tr>
                                    <tr class="table-primary">
                                        <td colspan="4" class="text-end fw-bold h5" data-en="Grand Total" data-ar="الإجمالي النهائي">Grand Total</td>
                                        <td class="text-end fw-bold h5" id="quot_grand_display"><?= __('currency') ?> 0.000</td>
                                    </tr>
                                </tfoot>
                            </table>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="add_quotation" class="btn btn-primary" data-en="Create Quotation" data-ar="إنشاء عرض السعر">Create Quotation</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <!-- Edit Quotation Modal -->
    <div class="modal fade" id="editQuotationModal" tabindex="-1">
        <div class="modal-dialog modal-xl">
            <div class="modal-content border-0 shadow">
                <div class="modal-header bg-primary text-white">
                    <h5 class="modal-title" data-en="Edit Quotation" data-ar="تعديل عرض السعر">Edit Quotation</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <input type="hidden" name="quotation_id" id="edit_quotation_id">
                    <div class="modal-body p-4">
                        <div class="row g-3 mb-4">
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="Customer" data-ar="العميل">Customer</label>
                                <select name="customer_id" id="edit_quot_customer_id" class="form-select select2" required>
                                    <option value="">---</option>
                                    <?php foreach ($data['customers_list'] as $c): ?>
                                    <option value="<?= $c['id'] ?>"><?= htmlspecialchars($c['name']) ?></option>
                                    <?php endforeach; ?>
                                </select>
                            </div>
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="Date" data-ar="التاريخ">Date</label>
                                <input type="date" name="quotation_date" id="edit_quot_date" class="form-control" required>
                            </div>
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="Valid Until" data-ar="صالح حتى">Valid Until</label>
                                <input type="date" name="valid_until" id="edit_quot_valid" class="form-control">
                            </div>
                            <div class="col-md-3">
                                <label class="form-label fw-bold" data-en="Status" data-ar="الحالة">Status</label>
                                <select name="status" id="edit_quot_status" class="form-select">
                                    <option value="pending">Pending</option>
                                    <option value="converted">Converted</option>
                                    <option value="expired">Expired</option>
                                    <option value="cancelled">Cancelled</option>
                                </select>
                            </div>
                        </div>

                        <div class="card mb-4">
                            <div class="card-body bg-light">
                                <label class="form-label fw-bold" data-en="Search Items" data-ar="بحث عن أصناف">Search Items</label>
                                <div class="position-relative">
                                    <input type="text" id="editQuotProductSearchInput" class="form-control" placeholder="Search by name or SKU..." autocomplete="off">
                                    <div id="editQuotSearchSuggestions" class="list-group position-absolute w-100 shadow-sm" style="display: none; z-index: 1000;"></div>
                                </div>
                            </div>
                        </div>

                        <div class="table-responsive">
                            <table class="table table-bordered align-middle">
                                <thead class="bg-light">
                                    <tr>
                                        <th style="width: 40%;" data-en="Item Details" data-ar="تفاصيل الصنف">Item Details</th>
                                        <th style="width: 15%;" data-en="Qty" data-ar="الكمية">Qty</th>
                                        <th style="width: 15%;" data-en="Unit Price" data-ar="سعر الوحدة">Unit Price</th>
                                        <th style="width: 10%;" data-en="VAT" data-ar="الضريبة">VAT</th>
                                        <th style="width: 15%;" data-en="Total" data-ar="الإجمالي">Total</th>
                                        <th style="width: 5%;"></th>
                                    </tr>
                                </thead>
                                <tbody id="editQuotItemsTableBody"></tbody>
                                <tfoot>
                                    <tr>
                                        <td colspan="4" class="text-end fw-bold" data-en="Subtotal" data-ar="الإجمالي الفرعي">Subtotal</td>
                                        <td class="text-end fw-bold" id="edit_quot_subtotal_display"><?= __('currency') ?> 0.000</td>
                                    </tr>
                                    <tr>
                                        <td colspan="4" class="text-end fw-bold" data-en="Total VAT" data-ar="إجمالي الضريبة">Total VAT</td>
                                        <td class="text-end fw-bold" id="edit_quot_vat_display"><?= __('currency') ?> 0.000</td>
                                    </tr>
                                    <tr class="table-primary">
                                        <td colspan="4" class="text-end fw-bold h5" data-en="Grand Total" data-ar="الإجمالي النهائي">Grand Total</td>
                                        <td class="text-end fw-bold h5" id="edit_quot_grand_display"><?= __('currency') ?> 0.000</td>
                                    </tr>
                                </tfoot>
                            </table>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="edit_quotation" class="btn btn-primary" data-en="Update Quotation" data-ar="تحديث عرض السعر">Update Quotation</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <!-- View Quotation Modal -->
    <div class="modal fade" id="viewQuotationModal" tabindex="-1">
        <div class="modal-dialog modal-lg">
            <div class="modal-content border-0 shadow">
                <div class="modal-header bg-info text-white d-print-none">
                    <h5 class="modal-title" data-en="View Quotation" data-ar="عرض سعر">View Quotation</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body p-0" id="quotationPrintableArea">
                    <!-- Dynamic content -->
                </div>
                <div class="modal-footer d-print-none">
                    <div id="quotationActionButtons" class="me-auto"></div>
                    <button type="button" class="btn btn-secondary" onclick="window.print()"><i class="bi bi-printer"></i data-en="Print" data-ar="طباعة">Print</button>
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Close" data-ar="إغلاق">Close</button>
                </div>
            </div>
        </div>
    </div>

    <style>
        @media print {
            .no-print, .sidebar, .topbar, .btn, .modal-header, .modal-footer, .d-print-none, 
            .modal-backdrop { display: none !important; }
            body { background: white !important; margin: 0 !important; padding: 0 !important; overflow: visible !important; }
            .main-content { margin: 0 !important; padding: 0 !important; background: white !important; }
            
            /* Hide all modals by default */
            .modal { display: none !important; }
            
            /* Show ONLY the active modal */
            .modal.show { 
                position: absolute !important; 
                left: 0 !important; 
                top: 0 !important; 
                margin: 0 !important; 
                padding: 0 !important; 
                overflow: visible !important; 
                display: block !important; 
                visibility: visible !important; 
                background: white !important;
                width: 100% !important;
            }
            
            .modal.show .modal-dialog { max-width: 100% !important; width: 100% !important; margin: 0 !important; padding: 0 !important; }
            .modal.show .modal-content { border: none !important; box-shadow: none !important; background: white !important; }
            .modal.show .modal-body { padding: 0 !important; margin: 0 !important; background: white !important; }
            
            @page {
                size: auto;
                margin: 5mm;
            }
            
            .invoice-printable-container {
                padding: 10px !important;
            }
            
            .mt-4 { margin-top: 1rem !important; }
            .mt-5 { margin-top: 1.5rem !important; }
            .mb-4 { margin-bottom: 1rem !important; }
            .p-5 { padding: 1.5rem !important; }
            
            .table-bordered th, .table-bordered td { border: 1px solid #dee2e6 !important; }
            .bg-light { background-color: #f8f9fa !important; -webkit-print-color-adjust: exact; }
            .text-primary { color: #0d6efd !important; -webkit-print-color-adjust: exact; }
            .badge { border: 1px solid #000; color: #000 !important; }
            
            /* Ensure the modal is the only thing visible ONLY when a modal is open */
            body.modal-open:not(.printing-receipt) { visibility: hidden !important; }
            body.modal-open:not(.printing-receipt) .modal.show { 
                visibility: visible !important; 
                display: block !important;
                position: absolute !important;
                left: 0 !important;
                top: 0 !important;
                width: 100% !important;
            }
            body.modal-open:not(.printing-receipt) .modal.show * { visibility: visible !important; }
            
            /* Old rules that caused blank pages for nested modals */
            /* body.modal-open:not(.printing-receipt) > *:not(.modal):not(.swal2-container) { display: none !important; } */
            /* body.modal-open:not(.printing-receipt) .main-content { display: none !important; } */
            
            /* POS Receipt printing specific */
            body.printing-receipt .modal { display: none !important; }
            body.printing-receipt .modal-backdrop { display: none !important; }
            body.printing-receipt #posPrintArea { 
                display: block !important; 
                visibility: visible !important;
                position: absolute !important;
                left: 0 !important;
                top: 0 !important;
                width: 100% !important;
                z-index: 9999 !important;
                background: white !important;
            }
            body.printing-receipt #posPrintArea * {
                visibility: visible !important;
            }
        }
        .invoice-logo { max-height: 80px; width: auto; }
        .invoice-header { border-bottom: 2px solid #333; padding-bottom: 20px; }
        .invoice-title { font-size: 2.5rem; color: #333; letter-spacing: 2px; }
        .invoice-info-card { background: #f8f9fa; border-radius: 8px; padding: 15px; height: 100%; }
        .table-formal thead th { background: #333; color: #fff; border: none; text-transform: uppercase; font-size: 0.85rem; }
    </style>

    <div class="modal fade" id="viewInvoiceModal" tabindex="-1">
        <div class="modal-dialog modal-lg">
            <div class="modal-content border-0 shadow">
                <div class="modal-header d-print-none">
                    <h5 class="modal-title" data-en="View Invoice" data-ar="عرض الفاتورة">View Invoice</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body p-0" id="invoicePrintableArea">
                    <div class="p-4 invoice-printable-container">
                        <div class="invoice-header mb-4">
                            <div class="row align-items-center">
                                <div class="col-6">
                                    <?php 
                                        $logo = $data['settings']['company_logo'] ?? $_SERVER['PROJECT_IMAGE_URL'] ?? '';
                                        if ($logo): 
                                    ?>
                                        <img src="<?= htmlspecialchars($logo) ?>" alt="Logo" class="invoice-logo mb-3">
                                    <?php endif; ?>
                                    <h3 class="mb-1 fw-bold"><?= htmlspecialchars($data['settings']['company_name'] ?? 'Accounting System') ?></h3>
                                    <p class="text-muted small mb-0"><?= nl2br(htmlspecialchars($data['settings']['company_address'] ?? '')) ?></p>
                                    <p class="text-muted small mb-0 fw-bold text-primary" id="invOutletName" style="display:none;"></p>
                                    <p class="text-muted small mb-0">VAT: <?= htmlspecialchars($data['settings']['vat_number'] ?? '') ?></p>
                                    <?php if (!empty($data['settings']['company_phone'])): ?>
                                        <p class="text-muted small mb-0">Tel: <?= htmlspecialchars($data['settings']['company_phone']) ?></p>
                                    <?php endif; ?>
                                </div>
                                <div class="col-6 text-end">
                                    <h1 class="invoice-title fw-bold mb-0 text-uppercase">Tax Invoice / فاتورة ضريبية</h1>
                                    <div class="mt-2"><span id="invoiceTypeLabel" class="badge"></span></div>
                                    <div class="mt-3">
                                        <p class="mb-0 fs-5">Invoice No / رقم الفاتورة: <strong id="invNumber" class="text-primary"></strong></p>
                                        <p class="mb-0">Date / التاريخ: <span id="invDate" class="fw-bold"></span></p>
                                        <p class="mb-0 small">Status / الحالة: <span id="invoiceStatusLabel"></span></p>
                                    </div>
                                </div>
                            </div>
                        </div>

                        <div class="row mb-4 g-3">
                            <div class="col-6">
                                <div class="invoice-info-card">
                                    <p class="text-muted small text-uppercase fw-bold mb-2 border-bottom pb-1" id="invPartyLabel">Bill To / فاتورة إلى</p>
                                    <h5 class="mb-1 fw-bold"><span id="invCustomerName"></span></h5>
                                    <p class="small text-muted mb-0" id="invCustomerTaxIdContainer">VAT / الضريبة: <span id="invCustomerTaxId"></span></p>
                                    <p class="small text-muted mb-0" id="invCustomerPhoneContainer">Phone / الهاتف: <span id="invCustomerPhone"></span></p>
                                </div>
                            </div>
                            <div class="col-6">
                                <div class="invoice-info-card text-end">
                                    <p class="text-muted small text-uppercase fw-bold mb-2 border-bottom pb-1">Payment Details / تفاصيل الدفع</p>
                                    <p class="mb-1">Method / الطريقة: <strong id="invPaymentType"></strong></p>
                                    <p class="mb-0 small text-muted">Currency / العملة: <strong>OMR / ريال عماني</strong></p>
                                </div>
                            </div>
                        </div>

                        <table class="table table-bordered table-formal">
                            <thead>
                                <tr>
                                    <th>Item Description / وصف الصنف</th>
                                    <th class="text-center" style="width: 80px;">Qty / الكمية</th>
                                    <th class="text-end" style="width: 120px;">Unit Price / سعر الوحدة</th>
                                    <th class="text-end" style="width: 100px;">VAT % / الضريبة %</th>
                                    <th class="text-end" style="width: 150px;">Total / الإجمالي</th>
                                </tr>
                            </thead>
                            <tbody id="invItemsBody"></tbody>
                        </table>

                        <div class="row mt-4">
                            <div class="col-6">
                                <div class="p-3 bg-light rounded" style="min-height: 80px;">
                                    <p class="text-muted small text-uppercase fw-bold mb-1">Amount in Words / المبلغ بالحروف</p>
                                    <p id="invAmountInWords" class="small fw-bold mb-0"></p>
                                </div>
                                <div class="mt-3">
                                    <p class="text-muted small text-uppercase fw-bold mb-1">Terms & Conditions / الشروط والأحكام</p>
                                    <ul class="small text-muted ps-3 mb-0">
                                        <li>Goods once sold will not be taken back or exchanged.</li>
                                        <li>Payment is due within the agreed credit period.</li>
                                    </ul>
                                </div>
                            </div>
                            <div class="col-6">
                                <div class="d-flex justify-content-between mb-2">
                                    <span class="text-muted">Subtotal (Excl. VAT) / المجموع الفرعي (دون الضريبة)</span>
                                    <span id="invSubtotal" class="fw-bold text-nowrap"></span>
                                </div>
                                <div class="d-flex justify-content-between mb-2">
                                    <span class="text-muted">VAT Amount / مبلغ الضريبة</span>
                                    <span id="invVatAmount" class="fw-bold text-nowrap"></span>
                                </div>
                                <div class="d-flex justify-content-between mb-3 border-top pt-2">
                                    <span class="h4 fw-bold">Grand Total / المجموع الكلي</span>
                                    <span id="invGrandTotal" class="h4 fw-bold text-primary text-nowrap"></span>
                                </div>
                                
                                 <div id="invPaymentsSection" class="mt-4 border-top pt-3">
                                    <p class="text-muted small text-uppercase fw-bold mb-2">Payment Tracking / تتبع الدفع</p>
                                    <table class="table table-sm table-bordered small mb-3">
                                        <thead class="table-light">
                                            <tr>
                                                <th>Date / التاريخ</th>
                                                <th>Method / الطريقة</th>
                                                <th class="text-end">Amount / المبلغ</th>
                                            </tr>
                                        </thead>
                                        <tbody id="invPaymentsBody"></tbody>
                                    </table>
                                    <div class="bg-light p-3 rounded">
                                        <div class="d-flex justify-content-between small mb-1">
                                            <span>Paid Amount / المبلغ المدفوع</span>
                                            <span id="invPaidInfo" class="text-success fw-bold"></span>
                                        </div>
                                        <div class="d-flex justify-content-between small fw-bold">
                                            <span>Balance Due / الرصيد المتبقي</span>
                                            <span id="invBalanceInfo" class="text-danger"></span>
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>

                        <div class="mt-4 pt-3 border-top text-center">
                            <div class="row">
                                <div class="col-4">
                                    <div class="border-top pt-2 mx-auto" style="width: 150px;">
                                        <p class="small text-muted mb-0">Customer Signature / توقيع العميل</p>
                                    </div>
                                </div>
                                <div class="col-4">
                                    <div id="invQrCode" class="d-flex justify-content-center"></div>
                                </div>
                                <div class="col-4">
                                    <div class="border-top pt-2 mx-auto" style="width: 150px;">
                                        <p class="small text-muted mb-0">Authorized Signatory / التوقيع المعتمد</p>
                                    </div>
                                </div>
                            </div>
                            <p class="text-muted x-small mt-3 mb-0">Generated by <?= htmlspecialchars($data['settings']['company_name'] ?? 'Accounting System') ?> | Visit us at <?= $_SERVER['HTTP_HOST'] ?></p>
                        </div>
                    </div>
                </div>
                <div class="modal-footer d-print-none">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Close" data-ar="إغلاق">Close</button>
                    <button type="button" class="btn btn-primary" onclick="window.print()"><i class="bi bi-printer me-2"></i>Print Invoice</button>
                </div>
            </div>
        </div>
    </div>

    <!-- Pay Invoice Modal -->
    <div class="modal fade" id="payInvoiceModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content border-0 shadow">
                <div class="modal-header bg-success text-white">
                    <h5 class="modal-title" data-en="Record Payment" data-ar="تسجيل دفعة">Record Payment</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <form method="POST">
                    <div class="modal-body">
                        <input type="hidden" name="invoice_id" id="pay_invoice_id">
                        <div class="mb-2">
                            <label class="form-label smaller fw-bold mb-1" data-en="Total Amount" data-ar="المبلغ الإجمالي">Total Amount</label>
                            <input type="text" id="pay_invoice_total" class="form-control form-control-sm" readonly>
                        </div>
                        <div class="mb-2">
                            <label class="form-label smaller fw-bold mb-1" data-en="Remaining Amount" data-ar="المبلغ المتبقي">Remaining Amount</label>
                            <input type="text" id="pay_remaining_amount" class="form-control form-control-sm" readonly>
                        </div>
                        <div class="mb-2">
                            <label class="form-label smaller fw-bold mb-1" data-en="Amount to Pay" data-ar="المبلغ المراد دفعه">Amount to Pay</label>
                            <input type="number" step="0.001" name="amount" id="pay_amount" class="form-control form-control-sm" required>
                        </div>
                        <div class="mb-2">
                            <label class="form-label smaller fw-bold mb-1" data-en="Payment Date" data-ar="تاريخ الدفع">Payment Date</label>
                            <input type="date" name="payment_date" class="form-control form-control-sm" value="<?= date('Y-m-d') ?>" required>
                        </div>
                        <div class="mb-2">
                            <label class="form-label smaller fw-bold mb-1" data-en="Payment Method" data-ar="طريقة الدفع">Payment Method</label>
                            <select name="payment_method" class="form-select form-select-sm select2" required>
                                <option value="Cash">Cash</option>
                                <option value="Card">Credit Card</option>
                                <option value="Bank Transfer">Bank Transfer</option>
                            </select>
                        </div>
                        <div class="mb-2">
                            <label class="form-label smaller fw-bold mb-1" data-en="Notes" data-ar="ملاحظات">Notes</label>
                            <textarea name="notes" class="form-control form-control-sm" rows="2"></textarea>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                        <button type="submit" name="record_payment" class="btn btn-success" data-en="Save Payment" data-ar="حفظ الدفعة">Save Payment</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <!-- Payment Receipt Modal -->
    <div class="modal fade" id="receiptModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content border-0 shadow">
                <div class="modal-header border-0 pb-0 d-print-none">
                    <h5 class="modal-title">Payment Receipt</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body p-0" id="printableReceipt">
                    <div class="receipt-container p-4">
                        <div class="text-center mb-4">
                            <?php 
                            $logo = $data['settings']['company_logo'] ?? '';
                            if ($logo): ?>
                                <img src="<?= htmlspecialchars($logo) ?>" alt="Logo" class="invoice-logo mb-3">
                            <?php endif; ?>
                            <h3 class="mb-1 fw-bold"><?= htmlspecialchars($data['settings']['company_name'] ?? 'Accounting System') ?></h3>
                            <p class="text-muted small mb-0"><?= nl2br(htmlspecialchars($data['settings']['company_address'] ?? '')) ?></p>
                            <p class="text-muted small mb-0 fw-bold text-primary" id="receiptOutletName" style="display:none;"></p>
                            <hr class="my-4">
                            <h4 class="letter-spacing-2 fw-bold text-uppercase">Payment Receipt / سند قبض</h4>
                        </div>
                        <div class="row mb-4">
                            <div class="col-6">
                                <p class="mb-1 text-muted small text-uppercase fw-bold">Receipt No / رقم السند</p>
                                <p class="fw-bold h5 text-primary" id="receiptNo"></p>
                            </div>
                            <div class="col-6 text-end">
                                <p class="mb-1 text-muted small text-uppercase fw-bold">Date / التاريخ</p>
                                <p class="fw-bold" id="receiptDate"></p>
                            </div>
                        </div>
                        <div class="mb-4 p-3 bg-light rounded">
                            <div class="row mb-2">
                                <div class="col-4 text-muted small text-uppercase fw-bold" id="receiptPartyLabel">Received From / استلمنا من</div>
                                <div class="col-8 fw-bold" id="receiptCustomer"></div>
                            </div>
                            <div class="row mb-2">
                                <div class="col-4 text-muted small text-uppercase fw-bold" id="receiptAgainstLabel">Against Invoice / مقابل فاتورة</div>
                                <div class="col-8 fw-bold" id="receiptInvNo"></div>
                            </div>
                            <div class="row mb-2">
                                <div class="col-4 text-muted small text-uppercase fw-bold">Payment Method / طريقة الدفع</div>
                                <div class="col-8 fw-bold" id="receiptMethod"></div>
                            </div>
                        </div>
                        <div class="text-center my-4 py-4 border-top border-bottom">
                            <p class="mb-1 text-muted small text-uppercase fw-bold">Amount Paid / المبلغ المدفوع</p>
                            <h3 class="fw-bold text-primary mb-1" id="receiptAmount"></h3>
                            <p class="text-muted small font-italic" id="receiptAmountWords"></p>
                        </div>
                        <div id="receiptNotesContainer" class="mb-4" style="display: none;">
                            <p class="mb-1 text-muted small text-uppercase fw-bold">Notes / ملاحظات</p>
                            <p class="small p-2 bg-light rounded" id="receiptNotes"></p>
                        </div>
                        <div class="row mt-5 pt-4">
                            <div class="col-6">
                                <div class="border-top pt-2 text-center small text-muted">Receiver's Signature / توقيع المستلم</div>
                            </div>
                            <div class="col-6">
                                <div class="border-top pt-2 text-center small text-muted">Authorized Signatory / التوقيع المعتمد</div>
                            </div>
                        </div>
                    </div>
                </div>
                <div class="modal-footer border-0 d-print-none">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Close" data-ar="إغلاق">Close</button>
                    <button type="button" class="btn btn-primary" onclick="window.printReceipt()"><i class="bi bi-printer me-2"></i>Print Receipt</button>
                </div>
            </div>
        </div>
    </div>

    <style>
        #posPaymentModal .modal-body { padding: 0.75rem; font-size: 0.8rem; }
        #posPaymentModal .amount-due-box { background: #f8f9fa; border-radius: 12px; padding: 10px 0; border: 1px solid #eee; }
        #posPaymentModal .amount-due-box .label { font-size: 0.65rem; text-transform: uppercase; font-weight: 700; color: #64748b; }
        #posPaymentModal .amount-due-box .value { font-size: 1rem; font-weight: 800; color: #1e293b; }
        #posPaymentModal .payment-methods-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
        #posPaymentModal .payment-method-btn { 
            padding: 6px 4px; border-radius: 10px; border: 2px solid #f1f5f9; cursor: pointer; 
            text-align: center; transition: all 0.2s; background: white;
        }
        #posPaymentModal .payment-method-btn.active { border-color: #3b82f6; background: #eff6ff; color: #1d4ed8; }
        #posPaymentModal .payment-method-btn i { font-size: 1rem; display: block; margin-bottom: 2px; }
        #posPaymentModal .payment-method-btn span { font-size: 0.65rem; }
        #posPaymentModal .quick-pay-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 4px; }
        #posPaymentModal .quick-pay-btn { 
            padding: 5px; border-radius: 8px; border: 1px solid #e2e8f0; background: white; 
            font-weight: bold; text-align: center; cursor: pointer; font-size: 0.75rem;
        }
        #posPaymentModal .payment-line { 
            display: flex; justify-content: space-between; align-items: center; 
            padding: 6px 10px; background: #f1f5f9; border-radius: 8px; margin-bottom: 4px;
        }
        #posPaymentModal .payment-line .method { font-weight: 600; color: #475569; font-size: 0.75rem; }
        #posPaymentModal .form-control { font-size: 0.85rem; padding: 0.35rem 0.6rem; }
        #posPaymentModal .btn-primary { padding: 0.35rem 0.8rem; font-size: 0.85rem; }
        #posPaymentModal .modal-header { padding: 0.75rem 1rem 0.25rem; }
        #posPaymentModal .modal-footer { padding: 0.25rem 1rem 0.75rem; }
    </style>

    <!-- POS Payment Modal -->
    <div class="modal fade" id="posPaymentModal" tabindex="-1" aria-hidden="true">
        <div class="modal-dialog">
            <div class="modal-content border-0">
                <div class="modal-header border-0 pb-0">
                    <h5 class="modal-title fw-bold">Payment</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                </div>
                <div class="modal-body">
                    <div class="mb-2 p-2 border rounded bg-light shadow-sm">
                        <div class="d-flex justify-content-between align-items-center">
                            <div>
                                <span class="small text-muted d-block" data-en="Customer" data-ar="العميل">Customer</span>
                                <span class="h6 fw-bold m-0 text-primary" id="paymentCustomerName">Walk-in Customer</span>
                            </div>
                            <i class="bi bi-person-circle fs-3 text-secondary"></i>
                        </div>
                        <div id="creditCustomerSection" class="mt-2 pt-2 border-top" style="display:none;">
                            <label class="form-label smaller fw-bold mb-1">Select Credit Customer</label>
                            <select id="paymentCreditCustomer" class="form-select form-select-sm select2" onchange="cart.syncCustomer(this.value)">
                                <option value="">--- Select Customer ---</option>
                                <?php foreach ($customers as $c): ?>
                                <option value="<?= $c['id'] ?>" data-search="<?= htmlspecialchars(strtolower($c['name'] . ' ' . ($c['phone'] ?? ''))) ?>"><?= htmlspecialchars($c['name']) ?> (<?= htmlspecialchars($c['phone'] ?? '') ?>)</option>
                                <?php endforeach; ?>
                            </select>
                        </div>
                    </div>

                    <div class="amount-due-box mb-2">
                        <div class="d-flex justify-content-between px-3">
                            <div class="text-start">
                                <div class="label">Amount Due</div>
                                <div class="value" id="paymentAmountDue">0.000</div>
                            </div>
                            <div class="text-end">
                                <div class="label text-danger">Remaining</div>
                                <div class="value text-danger" id="paymentRemaining">0.000</div>
                            </div>
                        </div>
                    </div>

                    <div id="paymentList" class="mb-2">
                        <!-- Added payments will appear here -->
                    </div>

                    <div class="mb-2 p-2 border rounded bg-light">
                        <label class="form-label small fw-bold mb-1">Add Payment Method</label>
                        <div class="payment-methods-grid mb-2">
                            <div class="payment-method-btn active" data-method="cash" onclick="cart.selectMethod('cash', this)">
                                <i class="bi bi-cash-stack"></i>
                                <span class="small fw-bold">Cash</span>
                            </div>
                            <div class="payment-method-btn" data-method="card" onclick="cart.selectMethod('card', this)">
                                <i class="bi bi-credit-card"></i>
                                <span class="small fw-bold">Credit Card</span>
                            </div>
                             <div class="payment-method-btn" data-method="credit" onclick="cart.selectMethod('credit', this)">
                                 <i class="bi bi-person-badge"></i>
                                 <span class="small fw-bold">Credit</span>
                             </div>
                             <div class="payment-method-btn" data-method="transfer" onclick="cart.selectMethod('transfer', this)">
                                 <i class="bi bi-bank"></i>
                                 <span class="small fw-bold">Bank Transfer</span>
                             </div>
                         </div>

                        <div class="row g-2 align-items-end">
                            <div class="col">
                                <label class="form-label smaller fw-bold mb-1" data-en="Amount" data-ar="المبلغ">Amount</label>
                                <div class="input-group">
                                    <input type="number" step="0.001" id="partialAmount" class="form-control" placeholder="0.000" oninput="cart.updateRemaining()">
                                </div>
                            </div>
                            <div class="col-auto">
                                <button type="button" class="btn btn-primary" onclick="cart.addPaymentLine()">
                                    <i class="bi bi-plus-lg"></i data-en="Add" data-ar="إضافة">ADD</button>
                            </div>
                        </div>

                        <div class="quick-pay-grid mt-2">
                            <div class="quick-pay-btn" onclick="cart.fillPartial(1)">1</div>
                            <div class="quick-pay-btn" onclick="cart.fillPartial(5)">5</div>
                            <div class="quick-pay-btn" onclick="cart.fillPartial(10)">10</div>
                            <div class="quick-pay-btn" onclick="cart.fillPartial(20)">20</div>
                            <div class="quick-pay-btn" onclick="cart.fillPartial(50)">50</div>
                        </div>
                    </div>

                    <div id="cashPaymentSection" style="display: none;">
                        <div class="d-flex justify-content-between align-items-center p-3 bg-primary-subtle rounded border border-primary-subtle">
                            <span class="fw-bold">Total Tendered (Cash)</span>
                            <span class="h6 m-0 fw-bold text-primary" id="changeDue">0.000</span>
                        </div>
                        <div class="small text-muted mt-1">* Change is calculated based on cash payments only.</div>
                    </div>
                </div>
                <div class="modal-footer border-0">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
                    <button type="button" class="btn btn-primary px-4" id="confirmPaymentBtn" onclick="cart.completeOrder()">
                        PAY & COMPLETE
                    </button>
                </div>
            </div>
        </div>
    </div>

    <!-- POS Receipt Modal -->
    <div class="modal fade" id="posReceiptModal" tabindex="-1" aria-hidden="true">
        <div class="modal-dialog modal-sm">
            <div class="modal-content border-0">
                <div class="modal-header border-0 pb-0">
                    <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                </div>
                <div class="modal-body pt-0">
                    <div id="posReceiptContent">
                        <!-- Receipt content will be generated here -->
                    </div>
                </div>
                <div class="modal-footer border-0">
                    <button type="button" class="btn btn-primary w-100" onclick="printPosReceipt()">
                        <i class="bi bi-printer me-2"></i>PRINT RECEIPT
                    </button>
                </div>
            </div>
        </div>
    </div>

    <div id="posPrintArea" class="d-none d-print-block"></div>

    <!-- Barcode Print Modal -->
    <div class="modal fade" id="barcodePrintModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content border-0 shadow">
                <div class="modal-header">
                    <h5 class="modal-title">Print Barcode Label</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body text-center">
                    <div id="barcodeContainer" class="p-4 bg-white border mb-3 mx-auto" style="width: fit-content;">
                        <div id="barcodeLabelName" class="fw-bold small mb-1"></div>
                        <svg id="barcodeSvg"></svg>
                        <div id="barcodeLabelPrice" class="fw-bold mt-1"></div>
                    </div>
                    <div class="mb-3">
                        <label class="form-label small">Number of Labels</label>
                        <input type="number" id="barcodeQty" class="form-control form-control-sm mx-auto" value="1" min="1" style="width: 80px;">
                    </div>
                    <div class="row mb-3 mx-auto" style="max-width: 200px;">
                        <div class="col-6">
                            <label class="form-label small">Width (mm)</label>
                            <input type="number" id="barcodeWidth" class="form-control form-control-sm" value="40" min="10">
                        </div>
                        <div class="col-6">
                            <label class="form-label small">Height (mm)</label>
                            <input type="number" id="barcodeHeight" class="form-control form-control-sm" value="25" min="10">
                        </div>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Close" data-ar="إغلاق">Close</button>
                    <button type="button" class="btn btn-primary" onclick="executeBarcodePrint()"><i class="bi bi-printer me-2"></i>Print Now</button>
                </div>
            </div>
        </div>
    </div>

    <!-- Avery Labels Modal -->
    <div class="modal fade" id="averyLabelsModal" tabindex="-1">
        <div class="modal-dialog modal-xl">
            <div class="modal-content border-0 shadow">
                <div class="modal-header d-print-none">
                    <h5 class="modal-title">Avery Barcode Labels (A4)</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <div class="row mb-4 d-print-none">
                        <div class="col-md-4">
                            <label class="form-label small">Label Layout</label>
                            <select id="averyLayout" class="form-select form-select-sm" onchange="updateAveryPreview()">
                                <option value="3x7">3 x 7 (21 Labels per sheet)</option>
                                <option value="3x8">3 x 8 (24 Labels per sheet)</option>
                                <option value="4x10">4 x 10 (40 Labels per sheet)</option>
                                <option value="L7651">L7651 (5 x 13 - 65 Labels)</option>
                                <option value="L4736">L4736 (2 x 7 - 14 Labels)</option>
                                <option value="L7431">L7431 (6 x 8 - 48 Labels)</option>
                                <option value="L4716">L4716 (6 x 8 - 48 Labels - Round)</option>
                            </select>
                        </div>
                        <div class="col-md-4">
                            <label class="form-label small">Copies (Set All)</label>
                            <input type="number" id="averyCopies" class="form-control form-control-sm" value="1" min="1" oninput="updateAllItemQuantities()" onchange="updateAllItemQuantities()">
                        </div>
                        <div class="col-md-4 d-flex align-items-end">
                            <button class="btn btn-primary btn-sm w-100" onclick="window.print()"><i class="bi bi-printer me-2"></i>Print A4 Sheet</button>
                        </div>
                    </div>

                    <div class="row mb-3 d-print-none">
                        <div class="col-12">
                            <label class="form-label small fw-bold" data-en="Quantities per Item" data-ar="الكميات لكل صنف">Quantities per Item</label>
                            <div id="averyItemQuantities" class="border rounded p-2 bg-light" style="max-height: 150px; overflow-y: auto;">
                                <small class="text-muted">Select items to adjust quantities.</small>
                            </div>
                        </div>
                    </div>
                    
                    <div id="averyPrintArea" class="avery-container">
                        <!-- Labels will be generated here -->
                    </div>
                </div>
            </div>
        </div>
    </div>

    <footer class="main-footer d-print-none">
        <div class="text-center py-3 border-top mt-5">
            <div class="text-muted small">
                Powered By <strong>Accounting</strong> &bull; omanapp.cloud &bull; aalabry@gmail.com &bull; Whatsapp: +968 99359472
            </div>
        </div>
    </footer>
</div>

    <style>
        /* Avery Label Printing */
        .avery-container {
            background: white;
            width: 210mm; /* A4 Width */
            min-height: 297mm; /* A4 Height */
            padding: 10mm 5mm;
            margin: 0 auto;
            display: grid;
            gap: 2mm;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }
        .avery-layout-3x7 { grid-template-columns: repeat(3, 1fr); grid-auto-rows: 38mm; }
        .avery-layout-3x8 { grid-template-columns: repeat(3, 1fr); grid-auto-rows: 34mm; }
        .avery-layout-4x10 { grid-template-columns: repeat(4, 1fr); grid-auto-rows: 27mm; }
        .avery-layout-L7651 { grid-template-columns: repeat(5, 1fr); grid-auto-rows: 21mm; }
        .avery-layout-L4736 { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 38mm; }
        .avery-layout-L7431 { grid-template-columns: repeat(6, 1fr); grid-auto-rows: 33mm; }
        .avery-layout-L4716 { grid-template-columns: repeat(6, 1fr); grid-auto-rows: 33mm; }
        
        .avery-layout-L4716 .avery-label { border-radius: 50%; }
        .avery-layout-L7431 .avery-label, .avery-layout-L4716 .avery-label { padding: 1mm; }
        .avery-layout-L7431 .avery-label div, .avery-layout-L4716 .avery-label div { font-size: 8px !important; }
        .avery-layout-L7431 .avery-label svg, .avery-layout-L4716 .avery-label svg { height: 20px; }
        
        .avery-layout-L7651 .avery-label { padding: 2mm; }
        .avery-layout-L7651 .avery-label svg { height: 25px; }
        .avery-layout-L7651 .avery-label div { font-size: 8px !important; }
        
        .avery-label {
            border: 1px dashed #eee;
            padding: 5mm;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
            background: white;
        }

        .avery-label svg {
            max-width: 100%;
            height: auto;
        }
        
        @media print {
            body.printing-avery .sidebar, 
            body.printing-avery .topbar, 
            body.printing-avery .modal-header,
            body.printing-avery .d-print-none,
            body.printing-avery .modal-backdrop {
                display: none !important;
            }
            body.printing-avery .modal {
                position: absolute !important;
                left: 0 !important;
                top: 0 !important;
                width: 100% !important;
                display: block !important;
                visibility: visible !important;
                background: white !important;
            }
            body.printing-avery .modal-dialog {
                max-width: 100% !important;
                width: 100% !important;
                margin: 0 !important;
                padding: 0 !important;
            }
            body.printing-avery .modal-content {
                border: none !important;
            }
            body.printing-avery .avery-label {
                border: none !important;
            }
            .avery-container {
                margin: 0 !important;
                padding: 10mm 5mm !important;
                box-shadow: none !important;
                border: none !important;
            }
        }
    </style>

    <script>
    // Avery Label Logic
    const selectAllItems = document.getElementById('selectAllItems');
    const bulkBarcodeBtn = document.getElementById('bulkBarcodeBtn');
    
    if (selectAllItems) {
        selectAllItems.addEventListener('change', function() {
            document.querySelectorAll('.item-checkbox').forEach(cb => {
                cb.checked = this.checked;
            });
            toggleBulkBtn();
        });
    }

    document.addEventListener('change', function(e) {
        if (e.target.classList.contains('item-checkbox')) {
            toggleBulkBtn();
        }
    });

    function toggleBulkBtn() {
        const checked = document.querySelectorAll('.item-checkbox:checked').length;
        if (bulkBarcodeBtn) {
            bulkBarcodeBtn.style.display = checked > 0 ? 'inline-block' : 'none';
        }
    }

    window.openAveryModal = function() {
        const modal = new bootstrap.Modal(document.getElementById('averyLabelsModal'));
        const checkedItems = document.querySelectorAll('.item-checkbox:checked');
        const container = document.getElementById('averyItemQuantities');
        const defaultCopies = parseInt(document.getElementById('averyCopies').value) || 1;

        if (container) {
            container.innerHTML = '';
            if (checkedItems.length === 0) {
                container.innerHTML = '<small class="text-muted" data-en="No items selected." data-ar="لم يتم تحديد أي صنف.">No items selected.</small>';
            } else {
                const table = document.createElement('table');
                table.className = 'table table-sm table-borderless mb-0';
                const tbody = document.createElement('tbody');
                
                checkedItems.forEach(cb => {
                    const sku = cb.dataset.sku;
                    const name = cb.dataset.name;
                    const id = cb.dataset.id;
                    
                    const tr = document.createElement('tr');
                    tr.innerHTML = `
                        <td class="align-middle" style="width: 70%; font-size: 0.9em;">${name} <span class="text-muted">(${sku})</span></td>
                        <td class="align-middle" style="width: 30%;">
                            <input type="number" class="form-control form-control-sm item-qty-input" 
                                   data-id="${id}" value="${defaultCopies}" min="0" onchange="updateAveryPreview()" onkeyup="updateAveryPreview()">
                        </td>
                    `;
                    tbody.appendChild(tr);
                });
                table.appendChild(tbody);
                container.appendChild(table);
            }
        }

        modal.show();
        updateAveryPreview();
    };

    window.updateAllItemQuantities = function() {
        const globalQty = document.getElementById('averyCopies').value;
        const itemInputs = document.querySelectorAll('.item-qty-input');
        itemInputs.forEach(input => {
            input.value = globalQty;
        });
        updateAveryPreview();
    };

    window.updateAveryPreview = function() {
        const layout = document.getElementById('averyLayout').value;
        const container = document.getElementById('averyPrintArea');
        const checkedItems = document.querySelectorAll('.item-checkbox:checked');
        
        container.className = 'avery-container avery-layout-' + layout;
        container.innerHTML = '';
        
        checkedItems.forEach(cb => {
            const sku = cb.dataset.sku;
            const nameAr = cb.dataset.nameAr || '';
            const nameEn = cb.dataset.nameEn || '';
            const name = cb.dataset.name;
            const price = cb.dataset.price;
            const id = cb.dataset.id;
            
            // Find specific quantity input
            const qtyInput = document.querySelector(`.item-qty-input[data-id="${id}"]`);
            let copies = 1;
            if (qtyInput) {
                copies = parseInt(qtyInput.value) || 0;
            } else {
                 copies = parseInt(document.getElementById('averyCopies').value) || 1;
            }
            
            for (let i = 0; i < copies; i++) {
                const label = document.createElement('div');
                label.className = 'avery-label';
                const uniqueId = Math.random().toString(36).substr(2, 9);
                const svgId = `bc-${sku}-${uniqueId}`;
                
                let nameHtml = '';
                if (nameAr || nameEn) {
                     const arText = nameAr || name;
                     const enText = nameEn || '';
                     nameHtml = `<div style="font-size: 10px; font-weight: bold; direction: rtl; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; line-height: 1.1;">${arText}</div>
                                 <div style="font-size: 8px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; line-height: 1.1;">${enText}</div>`;
                } else {
                     nameHtml = `<div style="font-size: 9px; font-weight: bold; margin-bottom: 2px; line-height: 1.1; overflow: hidden; text-overflow: ellipsis; width: 100%;">${name}</div>`;
                }

                label.innerHTML = `
                    ${nameHtml}
                    <svg id="${svgId}"></svg>
                    <div style="font-size: 11px; font-weight: bold; margin-top: 2px;">OMR ${price}</div>
                `;
                container.appendChild(label);
                
                setTimeout(() => {
                    if (document.getElementById(svgId)) {
                        const bcHeight = layout === 'L7651' ? 20 : 35;
                        JsBarcode(`#${svgId}`, sku, {
                            format: "CODE128",
                            width: layout === 'L7651' ? 1.0 : 1.2,
                            height: bcHeight,
                            displayValue: true,
                            fontSize: layout === 'L7651' ? 8 : 10,
                            margin: 0
                        });
                    }
                }, 0);
            }
        });
    };

    window.addEventListener('beforeprint', () => {
        if (document.getElementById('averyLabelsModal') && document.getElementById('averyLabelsModal').classList.contains('show')) {
            document.body.classList.add('printing-avery');
        }
    });
    window.addEventListener('afterprint', () => {
        document.body.classList.remove('printing-avery');
    });
    </script>


    <script>
    window.printItemBarcode = function(sku, nameAr, nameEn, price) {
        if (!sku) {
            Swal.fire('Error', 'This item has no SKU/Barcode assigned.', 'error');
            return;
        }
        document.getElementById('barcodeLabelName').innerHTML = '<div style="font-weight:bold; font-size:12px; direction:rtl; margin-bottom:2px;">' + nameAr + '</div><div style="font-size:10px;">' + nameEn + '</div>';
        document.getElementById('barcodeLabelPrice').textContent = 'OMR ' + price;
        
        JsBarcode("#barcodeSvg", sku, {
            format: "CODE128",
            lineColor: "#000",
            width: 2,
            height: 50,
            displayValue: true
        });
        
        const modal = new bootstrap.Modal(document.getElementById('barcodePrintModal'));
        modal.show();
    };

    window.executeBarcodePrint = function() {
        const qty = parseInt(document.getElementById('barcodeQty').value) || 1;
        const width = parseInt(document.getElementById('barcodeWidth').value) || 40;
        const height = parseInt(document.getElementById('barcodeHeight').value) || 25;
        
        // Get content
        const nameHtml = document.getElementById('barcodeLabelName').innerHTML;
        const price = document.getElementById('barcodeLabelPrice').innerText;
        const svg = document.getElementById('barcodeSvg').outerHTML;
        
        // Create a hidden iframe
        const iframe = document.createElement('iframe');
        iframe.style.position = 'absolute';
        iframe.style.width = '0px';
        iframe.style.height = '0px';
        iframe.style.border = 'none';
        document.body.appendChild(iframe);
        
        const doc = iframe.contentWindow.document;
        
        let labelsHtml = '';
        for (let i = 0; i < qty; i++) {
            labelsHtml += `
                <div class="label-container">
                    <div class="label-name" style="height: auto; overflow: visible;">${nameHtml}</div>
                    ${svg}
                    <div class="label-price">${price}</div>
                </div>
            `;
        }
        
        doc.open();
        doc.write(`
            <html>
            <head>
                <style>
                    @page { size: ${width}mm ${height}mm; margin: 0; }
                    body { margin: 0; padding: 0; font-family: sans-serif; }
                    .label-container {
                        width: ${width}mm;
                        height: ${height}mm;
                        page-break-after: always;
                        display: flex;
                        flex-direction: column;
                        justify-content: center;
                        align-items: center;
                        text-align: center;
                        overflow: hidden;
                        box-sizing: border-box;
                        padding: 1mm;
                    }
                    .label-container:last-child { page-break-after: avoid; }
                    .label-name { font-weight: bold; margin-bottom: 2px; line-height: 1.1; max-width: 100%; }
                    .label-price { font-size: 12px; font-weight: bold; margin-top: 2px; }
                    svg { max-width: 100%; height: auto; max-height: 70%; display: block; }
                </style>
            </head>
            <body>
                ${labelsHtml}
            </body>
            </html>
        `);
        doc.close();
        
        iframe.contentWindow.focus();
        setTimeout(() => {
            iframe.contentWindow.print();
            setTimeout(() => {
                document.body.removeChild(iframe);
            }, 2000);
        }, 500);
    };

    window.viewAndPrintA4Invoice = function(data, autoPrint = true) {
        if (!data) return;
        // Reuse view logic
        document.getElementById('invNumber').textContent = 'INV-' + data.id.toString().padStart(5, '0');
        document.getElementById('invDate').textContent = data.invoice_date;
        document.getElementById('invPaymentType').textContent = data.payment_type ? data.payment_type.toUpperCase() : 'CASH';
        document.getElementById('invCustomerName').textContent = data.customer_name || '---';
        
        const phoneEl = document.getElementById('invCustomerPhone');
        const phoneContainer = document.getElementById('invCustomerPhoneContainer');
        if (data.customer_phone) {
            phoneEl.textContent = data.customer_phone;
            phoneContainer.style.display = 'block';
        } else {
            phoneContainer.style.display = 'none';
        }

        const taxIdEl = document.getElementById('invCustomerTaxId');
        const taxIdContainer = document.getElementById('invCustomerTaxIdContainer');
        if (data.customer_tax_id) {
            taxIdEl.textContent = data.customer_tax_id;
            taxIdContainer.style.display = 'block';
        } else {
            taxIdContainer.style.display = 'none';
        }

        document.getElementById('invAmountInWords').textContent = data.total_in_words || '';
        
        const invOutletEl = document.getElementById('invOutletName');
        if (invOutletEl) {
            invOutletEl.textContent = data.outlet_name ? (data.outlet_name) : '';
            invOutletEl.style.display = data.outlet_name ? 'block' : 'none';
        }

        document.getElementById('invPartyLabel').textContent = data.type === 'sale' ? 'Bill To / فاتورة إلى' : 'Bill From / فاتورة من';
        document.getElementById('invPartyLabel').setAttribute('data-en', data.type === 'sale' ? 'Bill To' : 'Bill From');
        document.getElementById('invPartyLabel').setAttribute('data-ar', data.type === 'sale' ? 'فاتورة إلى' : 'فاتورة من');
        document.getElementById('invoiceTypeLabel').textContent = data.type;
        document.getElementById('invoiceTypeLabel').className = 'badge text-uppercase ' + (data.type === 'sale' ? 'bg-success' : 'bg-warning');
        
        const statusLabel = document.getElementById('invoiceStatusLabel');
        let statusClass = 'bg-secondary';
        let statusEn = data.status ? (data.status.charAt(0).toUpperCase() + data.status.slice(1)) : '---';
        if (data.status === 'paid') statusClass = 'bg-success';
        else if (data.status === 'unpaid') statusClass = 'bg-danger';
        else if (data.status === 'partially_paid') {
            statusClass = 'bg-warning text-dark';
            statusEn = 'Partially Paid';
        }
        
        statusLabel.textContent = statusEn;
        statusLabel.className = 'badge text-uppercase ' + statusClass;
        
        const body = document.getElementById('invItemsBody');
        body.innerHTML = '';
        if (data.items) {
            data.items.forEach(item => {
                const tr = document.createElement('tr');
                tr.innerHTML = `
                    <td>${item.name_en} / ${item.name_ar}</td>
                    <td class="text-center">${item.quantity}</td>
                    <td class="text-end"><small><?= __('currency') ?></small> ${parseFloat(item.unit_price).toFixed(3)}</td>
                    <td class="text-end">${parseFloat(item.vat_rate || 0).toFixed(2)}%</td>
                    <td class="text-end"><small><?= __('currency') ?></small> ${parseFloat(item.total_price).toFixed(3)}</td>
                `;
                body.appendChild(tr);
            });
        }
        const vatVal = parseFloat(data.vat_amount || 0);
        const totalVal = parseFloat(data.total_amount || 0);
        const grandTotalValue = (parseFloat(data.total_with_vat) || (totalVal + vatVal));

        if (document.getElementById('invSubtotal')) document.getElementById('invSubtotal').innerHTML = '<small><?= __('currency') ?></small> ' + (grandTotalValue - vatVal).toFixed(3);
        if (document.getElementById('invVatAmount')) document.getElementById('invVatAmount').innerHTML = '<small><?= __('currency') ?></small> ' + vatVal.toFixed(2);
        if (document.getElementById('invGrandTotal')) document.getElementById('invGrandTotal').innerHTML = '<small><?= __('currency') ?></small> ' + grandTotalValue.toFixed(3);

        if (document.getElementById('invPaidInfo')) document.getElementById('invPaidInfo').innerHTML = '<small><?= __('currency') ?></small> ' + parseFloat(data.paid_amount || 0).toFixed(3);
        const balance = grandTotalValue - parseFloat(data.paid_amount || 0);
        if (document.getElementById('invBalanceInfo')) document.getElementById('invBalanceInfo').innerHTML = '<small><?= __('currency') ?></small> ' + balance.toFixed(3);

        // Generate QR Code for Zakat, Tax and Customs Authority (ZATCA) style or simple formal
        const companyName = <?= json_encode($data['settings']['company_name'] ?? 'Accounting System') ?>;
        const vatNo = <?= json_encode($data['settings']['vat_number'] ?? '') ?>;
        const qrData = `Seller: ${companyName}\nVAT: ${vatNo}\nInvoice: INV-${data.id.toString().padStart(5, '0')}\nDate: ${data.invoice_date}\nTotal: ${grandTotalValue.toFixed(3)}`;
        const qrUrl = `https://api.qrserver.com/v1/create-qr-code/?size=100x100&data=${encodeURIComponent(qrData)}`;
        if (document.getElementById('invQrCode')) {
            document.getElementById('invQrCode').innerHTML = `<img src="${qrUrl}" alt="QR Code" style="width: 100px; height: 100px;" class="border p-1 bg-white">`;
        }
        
        const viewModal = bootstrap.Modal.getOrCreateInstance(document.getElementById('viewInvoiceModal'));
        viewModal.show();
        
        if (autoPrint) {
            setTimeout(() => { window.print(); }, 1000);
        }

        fetch(`index.php?action=get_payments&invoice_id=${data.id}`)
            .then(res => res.json())
            .then(payments => {
                const paymentsBody = document.getElementById('invPaymentsBody');
                const paymentsSection = document.getElementById('invPaymentsSection');
                if (paymentsBody) paymentsBody.innerHTML = '';
                if (payments && payments.length > 0) {
                    if (paymentsBody) {
                        payments.forEach(p => {
                            const tr = document.createElement('tr');
                            tr.innerHTML = `<td>${p.payment_date}</td><td>${p.payment_method}</td><td class="text-end fw-bold">OMR ${parseFloat(p.amount).toFixed(3)}</td>`;
                            paymentsBody.appendChild(tr);
                        });
                    }
                    if (paymentsSection) paymentsSection.style.display = 'block';
                } else {
                    if (paymentsSection) paymentsSection.style.display = 'none';
                }
            }).catch(err => console.error('Error fetching payments:', err));
    };

    window.printPosReceiptFromInvoice = function(inv) {
        const container = document.getElementById('posReceiptContent');
        const itemsHtml = inv.items.map(item => {
            const itemTotal = item.unit_price * item.quantity;
            const vatRate = parseFloat(item.vat_rate !== undefined && item.vat_rate !== null ? item.vat_rate : 0);
            const vatAmount = itemTotal * (vatRate / (100 + vatRate));
            return `
            <tr>
                <td>${item.name_en} / ${item.name_ar}<br><small>${item.quantity} x ${parseFloat(item.unit_price).toFixed(3)}</small></td>
                <td style="text-align: right; vertical-align: bottom;">${vatAmount.toFixed(2)}</td>
                <td style="text-align: right; vertical-align: bottom;">${itemTotal.toFixed(3)}</td>
            </tr>
            `;
        }).join('');
        
        const totalVat = inv.items.reduce((sum, item) => {
            const itemTotal = item.unit_price * item.quantity;
            const vatRate = parseFloat(item.vat_rate !== undefined && item.vat_rate !== null ? item.vat_rate : 0);
            return sum + (itemTotal * (vatRate / (100 + vatRate)));
        }, 0);
        const subtotal = inv.items.reduce((sum, item) => sum + (item.unit_price * item.quantity), 0);
        
        const companyName = "<?= htmlspecialchars($data['settings']['company_name'] ?? 'Accounting System') ?>";
            const outletName = "<?= htmlspecialchars($data['settings']['current_outlet_name'] ?? '') ?>";
        const companyPhone = "<?= htmlspecialchars($data['settings']['company_phone'] ?? '') ?>";
        const companyVat = "<?= htmlspecialchars($data['settings']['vat_number'] ?? '') ?>";
        const companyLogo = "<?= htmlspecialchars($data['settings']['company_logo'] ?? '') ?>";

        container.innerHTML = `
            <div class="thermal-receipt">
                <div class="center">
                    ${companyLogo ? `<img src="${companyLogo}" alt="Logo" style="max-height: 60px; width: auto; margin-bottom: 10px; display: block; margin-left: auto; margin-right: auto;">` : ''}
                    <h5 class="mb-0 fw-bold">${companyName}</h5>
                    ${inv.outlet_name ? `<div class="fw-bold text-uppercase">${inv.outlet_name}</div>` : ''}
                    ${companyPhone ? `<div>Tel: ${companyPhone}</div>` : ''}
                    ${companyVat ? `<div>VAT: ${companyVat}</div>` : ''}
                    <div class="separator"></div>
                    <h6 class="fw-bold">TAX INVOICE / فاتورة ضريبية</h6>
                    <div>Inv / رقم: INV-${inv.id.toString().padStart(5, '0')}</div>
                    <div>Date / التاريخ: ${inv.invoice_date}</div>
                    <div class="separator"></div>
                </div>
                <div>
                    <strong>Customer / العميل:</strong> ${inv.customer_name || 'Walk-in / عميل عابر'}
                </div>
                <div class="separator"></div>
                <table>
                    <thead>
                        <tr>
                            <th>ITEM / الصنف</th>
                            <th style="text-align: right;">VAT / الضريبة</th>
                            <th style="text-align: right;">TOTAL / الإجمالي</th>
                        </tr>
                    </thead>
                    <tbody>
                        ${itemsHtml}
                    </tbody>
                </table>
                <div class="separator"></div>
                <div class="d-flex justify-content-between small">
                    <span>Subtotal (Excl. VAT) / المجموع الفرعي (دون الضريبة)</span>
                    <span><?= __('currency') ?> ${(subtotal - totalVat).toFixed(3)}</span>
                </div>
                <div class="d-flex justify-content-between small">
                    <span>VAT / الضريبة</span>
                    <span><?= __('currency') ?> ${totalVat.toFixed(2)}</span>
                </div>
                <div class="total-row d-flex justify-content-between">
                    <span>TOTAL (Incl. VAT) / الإجمالي (شامل الضريبة)</span>
                    <span><?= __('currency') ?> ${subtotal.toFixed(3)}</span>
                </div>
                <div class="d-flex justify-content-between small">
                    <span>PAID / المدفوع</span>
                    <span><?= __('currency') ?> ${parseFloat(inv.paid_amount).toFixed(3)}</span>
                </div>
                <div class="d-flex justify-content-between small fw-bold">
                    <span>BALANCE / الرصيد</span>
                    <span><?= __('currency') ?> ${(subtotal - inv.paid_amount).toFixed(3)}</span>
                </div>
                <div class="separator"></div>
                <div class="center small">
                    <p>Thank You for your business! / شكراً لتعاملكم معنا!</p>
                </div>
            </div>
        `;
        
        const posModal = new bootstrap.Modal(document.getElementById('posReceiptModal'));
        posModal.show();
    };

    function printPosReceipt() {
        const content = document.getElementById('posReceiptContent').innerHTML;
        const printArea = document.getElementById('posPrintArea');
        printArea.innerHTML = `<div class="thermal-receipt thermal-receipt-print">${content}</div>`;
        
        document.body.classList.add('printing-receipt');
        window.print();
        document.body.classList.remove('printing-receipt');
        location.reload();
    }

    // --- Language Apply Script ---
    function applyLanguage(node) {
        const docLang = document.documentElement.lang || 'ar';
        const targetAttr = docLang === 'ar' ? 'data-ar' : 'data-en';

        let elements = [];
        if (node.nodeType === Node.ELEMENT_NODE) {
            if (node.hasAttribute(targetAttr)) {
                elements.push(node);
            }
            node.querySelectorAll('[' + targetAttr + ']').forEach(el => elements.push(el));
        }

        elements.forEach(el => {
            const text = el.getAttribute(targetAttr);
            if (!text) return;

            if (el.hasAttribute('placeholder')) {
                el.setAttribute('placeholder', text);
            }
            if (el.hasAttribute('title')) {
                el.setAttribute('title', text);
            }

            let textNodes = [];
            el.childNodes.forEach(child => {
                if (child.nodeType === Node.TEXT_NODE && child.nodeValue.trim() !== '') {
                    textNodes.push(child);
                }
            });

            if (textNodes.length > 0) {
                textNodes[0].nodeValue = text;
                for (let i = 1; i < textNodes.length; i++) {
                    textNodes[i].nodeValue = '';
                }
            } else if (el.children.length === 1 && ['STRONG', 'B', 'SPAN', 'SMALL'].includes(el.children[0].tagName)) {
                el.children[0].textContent = text;
            } else if (el.children.length === 0) {
                el.textContent = text;
            }
        });
    }

    document.addEventListener('DOMContentLoaded', function() {
        applyLanguage(document.body);

        const observer = new MutationObserver(mutations => {
            mutations.forEach(mutation => {
                mutation.addedNodes.forEach(node => {
                    if (node.nodeType === Node.ELEMENT_NODE) {
                        applyLanguage(node);
                    }
                });
            });
        });
        observer.observe(document.body, { childList: true, subtree: true });
    });
    // -----------------------------
    <?php if ($page === 'dashboard' && can('dashboard_view')): ?>
    const monthlyData = <?= json_encode($data['monthly_sales']) ?>;
    const yearlyData = <?= json_encode($data['yearly_sales']) ?>;
    
    const ctx = document.getElementById('salesChart').getContext('2d');
    let salesChart = new Chart(ctx, {
        type: 'line',
        data: {
            labels: monthlyData.map(d => d.label),
            datasets: [{
                label: 'Sales (OMR)',
                data: monthlyData.map(d => d.total),
                borderColor: '#0d6efd',
                backgroundColor: 'rgba(13, 110, 253, 0.1)',
                fill: true,
                tension: 0.4
            }]
        },
        options: {
            responsive: true,
            maintainAspectRatio: false,
            plugins: {
                legend: { display: false }
            },
            scales: {
                y: {
                    beginAtZero: true,
                    ticks: {
                        callback: function(value) { return 'OMR ' + value.toFixed(3); }
                    }
                }
            }
        }
    });

    document.getElementById('btnMonthly').addEventListener('click', function() {
        this.classList.add('active');
        document.getElementById('btnYearly').classList.remove('active');
        salesChart.data.labels = monthlyData.map(d => d.label);
        salesChart.data.datasets[0].data = monthlyData.map(d => d.total);
        salesChart.update();
    });

    document.getElementById('btnYearly').addEventListener('click', function() {
        this.classList.add('active');
        document.getElementById('btnMonthly').classList.remove('active');
        salesChart.data.labels = yearlyData.map(d => d.label);
        salesChart.data.datasets[0].data = yearlyData.map(d => d.total);
        salesChart.update();
    });
    <?php endif; ?>

    </script>
</body>
</html>