<?php
require_once __DIR__ . '/includes/app.php';
require_permission('stock', 'show');

$pdo = db();
$items = [];

$skus = [];
if ($_SERVER['REQUEST_METHOD'] === 'POST' && !empty($_POST['skus'])) {
    $skus = is_array($_POST['skus']) ? $_POST['skus'] : explode(',', $_POST['skus']);
    $skus = array_values(array_filter(array_map('trim', $skus)));
} elseif (!empty($_GET['sku'])) {
    $skus = [$_GET['sku']];
}

if (!empty($skus)) {
    $placeholders = str_repeat('?,', count($skus) - 1) . '?';
    $stmt = $pdo->prepare("SELECT * FROM items WHERE sku IN ($placeholders)");
    $stmt->execute($skus);
    $results = $stmt->fetchAll();
    // Index by SKU
    foreach ($results as $row) {
        $items[$row['sku']] = $row;
    }
}

$customWidth = $_REQUEST['custom_width'] ?? '40';
$customHeight = $_REQUEST['custom_height'] ?? '25';

// Templates configuration
$templates = [
    'custom_roll' => [
        'name' => 'Custom Size / مقاس مخصص (أدخل المقاس أدناه)',
        'cols' => 1,
        'rows' => 1,
        'width' => $customWidth . 'mm',
        'height' => $customHeight . 'mm',
        'margin_top' => '0mm', 
        'margin_left' => '0mm', 
        'gap_x' => '0mm',
        'gap_y' => '0mm',
        'page_width' => $customWidth . 'mm',
        'page_height' => $customHeight . 'mm',
    ],
    'avery_65' => [
        'name' => 'Roll / Zebra (40 x 25 mm)',
        'cols' => 1,
        'rows' => 1,
        'width' => '40mm',
        'height' => '25mm',
        'margin_top' => '0mm', 
        'margin_left' => '0mm', 
        'gap_x' => '0mm',
        'gap_y' => '0mm',
        'page_width' => '40mm',
        'page_height' => '25mm',
    ],
    'roll_25x40' => [
        'name' => 'Roll / Zebra (25 x 40 mm)',
        'cols' => 1,
        'rows' => 1,
        'width' => '25mm',
        'height' => '40mm',
        'margin_top' => '0mm', 
        'margin_left' => '0mm', 
        'gap_x' => '0mm',
        'gap_y' => '0mm',
        'page_width' => '25mm',
        'page_height' => '40mm',
    ],
    'roll_38x25' => [
        'name' => 'Roll / Zebra (38 x 25 mm)',
        'cols' => 1,
        'rows' => 1,
        'width' => '38mm',
        'height' => '25mm',
        'margin_top' => '0mm', 
        'margin_left' => '0mm', 
        'gap_x' => '0mm',
        'gap_y' => '0mm',
        'page_width' => '38mm',
        'page_height' => '25mm',
    ],
    'avery_65' => [
        'name' => 'Avery L7651 - 65 Labels (38.1 x 21.2 mm)',
        'cols' => 5,
        'rows' => 13,
        'width' => '38.1mm',
        'height' => '21.2mm',
        'margin_top' => '10.5mm', 
        'margin_left' => '4.7mm', 
        'gap_x' => '2.5mm',
        'gap_y' => '0mm',
        'page_width' => '210mm',
        'page_height' => '297mm',
    ],
    'avery_54' => [
        'name' => 'Avery 54 Labels (32 x 25.4 mm)', 
        'cols' => 6,
        'rows' => 9,
        'width' => '32mm',
        'height' => '25.4mm',
        'margin_top' => '10mm',
        'margin_left' => '5mm',
        'gap_x' => '2mm',
        'gap_y' => '0mm',
        'page_width' => '210mm',
        'page_height' => '297mm',
    ],
    'avery_45' => [
        'name' => 'Avery 45 Labels (38.1 x 29.6 mm)', 
        'cols' => 5,
        'rows' => 9,
        'width' => '38.1mm',
        'height' => '29.6mm',
        'margin_top' => '15mm',
        'margin_left' => '5mm',
        'gap_x' => '2mm',
        'gap_y' => '0mm',
        'page_width' => '210mm',
        'page_height' => '297mm',
    ]
];

$templateId = $_REQUEST['template'] ?? 'avery_65';
$tpl = $templates[$templateId] ?? $templates['avery_65'];

$pageWidth = $tpl['page_width'] ?? '210mm';
$pageHeight = $tpl['page_height'] ?? '297mm';
$pageCssSize = (isset($tpl['page_width']) && $tpl['page_width'] !== '210mm') ? "{$tpl['page_width']} {$tpl['page_height']}" : "A4 portrait";

if ($templateId !== 'custom_roll') {
    $customWidth = floatval(str_replace('mm', '', $tpl['width']));
    $customHeight = floatval(str_replace('mm', '', $tpl['height']));
}

// Prepare labels to print
$labelsToPrint = [];
if (!empty($items)) {
    // Check if quantities are posted
    if ($_SERVER['REQUEST_METHOD'] === 'POST' && !empty($_POST['qty'])) {
        foreach ($_POST['qty'] as $sku => $qty) {
            if (isset($items[$sku])) {
                for ($i = 0; $i < (int)$qty; $i++) {
                    $labelsToPrint[] = $items[$sku];
                }
            }
        }
    } else {
        // Default 1 per item
        foreach ($skus as $sku) {
            if (isset($items[$sku])) {
                $labelsToPrint[] = $items[$sku];
            }
        }
    }
}

$isSinglePrint = isset($_GET['sku']) && count($skus) === 1;
$companyName = current_lang() === 'ar' ? get_setting('company_name_ar', 'حلوى الريامي') : get_setting('company_name_en', 'Al Riyami Sweets');

?>
<!DOCTYPE html>
<html lang="<?= current_lang() ?>" dir="<?= current_lang() === 'ar' ? 'rtl' : 'ltr' ?>">
<head>
    <meta charset="UTF-8">
    <title><?= h(tr('طباعة ملصقات', 'Print Labels')) ?></title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/jsbarcode@3.11.5/dist/JsBarcode.all.min.js"></script>
    <style>
        body { background: #f0f2f5; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
        .no-print { display: block; }
        .print-only { display: none; }
        
        .page {
            width: <?= $pageWidth ?>;
            height: <?= $pageHeight ?>;
            padding-top: <?= $tpl['margin_top'] ?>;
            padding-left: <?= $tpl['margin_left'] ?>;
            padding-right: <?= $tpl['margin_left'] ?>;
            margin: 10mm auto;
            border: 1px solid #D3D3D3;
            border-radius: 5px;
            background: white;
            box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
            display: grid;
            grid-template-columns: repeat(<?= $tpl['cols'] ?>, <?= $tpl['width'] ?>);
            grid-auto-rows: <?= $tpl['height'] ?>;
            column-gap: <?= $tpl['gap_x'] ?>;
            row-gap: <?= $tpl['gap_y'] ?>;
            box-sizing: border-box;
            page-break-after: always;
            overflow: hidden;
        }

        .label-item {
            width: <?= $tpl['width'] ?>;
            height: <?= $tpl['height'] ?>;
            border: 1px dashed #ccc;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            overflow: hidden;
            box-sizing: border-box;
            padding: 2px;
            text-align: center;
        }

        .label-company { font-size: 9px; font-weight: bold; margin-bottom: 1px; text-transform: uppercase; }
        .label-name { font-size: 9px; font-weight: bold; line-height: 1.1; margin-bottom: 2px; max-height: 20px; overflow: hidden; }
        .label-price { font-size: 10px; font-weight: bold; margin-top: 1px; }
        .label-sku { font-size: 8px; color: #555; }
        .label-barcode { margin: 0; display: flex; align-items: center; justify-content: center; }
        .label-barcode svg { width: 100%; height: 100%; max-height: 14px; } 

        @media print {
            body { background: white; margin: 0; padding: 0; }
            .no-print { display: none !important; }
            .print-only { display: block; }
            .page {
                margin: 0;
                border: initial;
                border-radius: initial;
                width: <?= $pageWidth ?>;
                height: <?= $pageHeight ?>;
                box-shadow: initial;
                background: initial;
                page-break-after: always;
                overflow: hidden;
            }
            .page:last-of-type {
                page-break-after: auto;
            }
            .label-item { border: none; }
            @page { size: <?= $pageCssSize ?>; margin: 0; }
        }
    </style>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.5/font/bootstrap-icons.css">
</head>
<body>

<div class="container mt-4 no-print">
    <div class="card shadow-sm">
        <div class="card-header bg-primary text-white d-flex justify-content-between align-items-center">
            <h5 class="mb-0"><?= h(tr('إعدادات الطباعة', 'Print Settings')) ?></h5>
            <a href="stock.php" class="btn btn-sm btn-light"><?= h(tr('رجوع للمخزون', 'Back to Stock')) ?></a>
        </div>
        <div class="card-body">
            <form method="POST">
                <div class="row g-3 align-items-end mb-3">
                    <div class="col-md-4">
                        <label class="form-label fw-bold"><?= h(tr('قالب الملصقات', 'Label Template')) ?></label>
                        <select name="template" class="form-select" onchange="this.form.submit()">
                            <?php foreach($templates as $key => $t):
                                ?><option value="<?= $key ?>" <?= $templateId === $key ? 'selected' : '' ?>><?= $t['name'] ?></option>
                            <?php endforeach; ?>
                        </select>
                    </div>
                    
                    
                    <div class="col-md-auto text-end flex-grow-1">
                        <button type="button" class="btn btn-success btn-lg shadow" onclick="window.print()">
                            <i class="bi bi-printer"></i> <?= h(tr('طباعة الآن', 'Print Now')) ?>
                        </button>
                    </div>
                </div>

                <div class="table-responsive border rounded">
                    <table class="table table-hover align-middle mb-0">
                        <thead class="table-light">
                            <tr>
                                <th>SKU</th>
                                <th><?= h(tr('الصنف', 'Item')) ?></th>
                                <th><?= h(tr('السعر', 'Price')) ?></th>
                                <th width="150" class="text-center"><?= h(tr('عدد الملصقات', 'Labels Count')) ?></th>
                                <th width="80" class="text-center"><?= h(tr('إزالة', 'Remove')) ?></th>
                            </tr>
                        </thead>
                        <tbody>
                            <?php foreach($items as $sku => $item):
                                ?><tr>
                                    <td class="fw-bold text-secondary">
                                        <?= h($sku) ?>
                                        <input type="hidden" name="skus[]" value="<?= h($sku) ?>">
                                    </td>
                                    <td><?= h($item['name']) ?></td>
                                    <td><span class="badge bg-light text-dark border"><?= h(currency($item['price'])) ?></span></td>
                                    <td>
                                        <input type="number" name="qty[<?= h($sku) ?>]" class="form-control text-center" value="<?= isset($_POST['qty'][$sku]) ? (int)$_POST['qty'][$sku] : 1 ?>" min="1">
                                    </td>
                                    <td class="text-center">
                                        <button type="button" class="btn btn-sm btn-outline-danger rounded-circle" onclick="this.closest('tr').remove();" title="<?= h(tr('إزالة', 'Remove')) ?>">
                                            <i class="bi bi-x-lg"></i>
                                        </button>
                                    </td>
                                </tr>
                            <?php endforeach; ?>
                            <?php if(empty($items)):
                                ?><tr>
                                    <td colspan="5" class="text-center text-muted py-4">
                                        <i class="bi bi-inbox fs-3 d-block mb-2"></i>
                                        <?= h(tr('لم يتم تحديد أصناف', 'No items selected')) ?>
                                    </td>
                                </tr>
                            <?php endif; ?>
                        </tbody>
                    </table>
                </div>
                <?php if(!empty($items)):
                    ?><div class="mt-3">
                        <button type="submit" class="btn btn-primary">
                            <i class="bi bi-arrow-clockwise"></i> <?= h(tr('تحديث المعاينة', 'Update Preview')) ?>
                        </button>
                    </div>
                <?php endif; ?>
            </form>
        </div>
    </div>
</div>

<?php if (!empty($labelsToPrint)): ?>
    <div class="print-preview mt-4">
        <h5 class="text-center no-print text-muted mb-3"><i class="bi bi-view-list"></i> <?= h(tr('معاينة الطباعة', 'Print Preview')) ?></h5>
        <?php
        $labelsPerPage = $tpl['cols'] * $tpl['rows'];
        $pages = array_chunk($labelsToPrint, $labelsPerPage);
        foreach ($pages as $pageIdx => $pageLabels):
        ?>
            <div class="page bg-white">
                <?php foreach ($pageLabels as $label):
                    ?><div class="label-item">
                        <div class="label-company"><?= h($companyName) ?></div>
                        <div class="label-name"><?= h($label['name']) ?></div>
                        <div class="label-barcode">
                            <svg class="barcode"
                                jsbarcode-format="code128"
                                jsbarcode-value="<?= h($label['sku']) ?>"
                                jsbarcode-displayvalue="false"
                                jsbarcode-width="1"
                                jsbarcode-height="15"
                                jsbarcode-margin="0">
                            </svg>
                        </div>
                        <div class="label-sku"><?= h($label['sku']) ?></div>
                        <div class="label-price"><?= h(currency($label['price'])) ?></div>
                    </div>
                <?php endforeach; ?>
            </div>
        <?php endforeach; ?>
    </div>
    
    <div class="text-center mt-4 mb-5 no-print">
        <button type="button" class="btn btn-success btn-lg px-5 py-3 shadow-lg rounded-pill" onclick="window.print()">
            <i class="bi bi-printer fs-4"></i> <?= h(tr('الطباعة الآن', 'Print Labels Now')) ?>
        </button>
    </div>
<?php endif; ?>

<script>
    document.addEventListener("DOMContentLoaded", function() {
        if (typeof JsBarcode !== 'undefined') {
            JsBarcode(".barcode").init();
        }
    });
</script>
</body>
</html>