<?php
declare(strict_types=1);
error_reporting(E_ALL);
ini_set("display_errors", "1");
require_once __DIR__ . '/../db/config.php';
require_once __DIR__ . '/../includes/functions.php';

$pdo = db();
require_permission('orders_view');

// Handle status updates
if (isset($_POST['action']) && $_POST['action'] === 'update_status') {
    if (!has_permission('orders_add')) {
        header("Location: orders.php?error=permission_denied");
        exit;
    }
    $order_id = $_POST['order_id'];
    $new_status = $_POST['status'];
    $stmt = $pdo->prepare("UPDATE orders SET status = ? WHERE id = ?");
    $stmt->execute([$new_status, $order_id]);
    header("Location: orders.php?" . http_build_query($_GET)); // Keep filters
    exit;
}

// Handle stopping all promotions
if (isset($_POST['action']) && $_POST['action'] === 'stop_promotions') {
    if (!has_permission('manage_products')) {
        header("Location: orders.php?error=permission_denied");
        exit;
    }
    // Set promo_date_to to yesterday for all currently active promotions
    $stmt = $pdo->prepare("UPDATE products SET promo_date_to = DATE_SUB(CURDATE(), INTERVAL 1 DAY) WHERE (promo_date_to >= CURDATE() OR promo_date_to IS NULL) AND promo_discount_percent IS NOT NULL");
    $stmt->execute();
    header("Location: orders.php?success=promotions_stopped");
    exit;
}

// Handle Delete Order
if (isset($_GET['delete'])) {
    if (!has_permission('manage_orders')) {
        header("Location: orders.php?error=permission_denied");
        exit;
    }
    $id = (int)$_GET['delete'];
    $pdo->beginTransaction();
    try {
        $pdo->prepare("DELETE FROM order_items WHERE order_id = ?")->execute([$id]);
        $pdo->prepare("DELETE FROM orders WHERE id = ?")->execute([$id]);
        $pdo->commit();
        header("Location: orders.php?success=order_deleted");
    } catch (Exception $e) {
        $pdo->rollBack();
        header("Location: orders.php?error=delete_failed");
    }
    exit;
}

// Fetch Outlets for Filter
$outlets = $pdo->query("SELECT id, name FROM outlets WHERE is_deleted = 0 ORDER BY name")->fetchAll(PDO::FETCH_ASSOC);

// Build Query with Filters
$params = [];
$where = [];

// Filter: Outlet
if (!empty($_GET['outlet_id'])) {
    $where[] = "o.outlet_id = :outlet_id";
    $params[':outlet_id'] = $_GET['outlet_id'];
}

// Filter: Date Range
if (!empty($_GET['start_date'])) {
    $where[] = "DATE(o.created_at) >= :start_date";
    $params[':start_date'] = $_GET['start_date'];
}
if (!empty($_GET['end_date'])) {
    $where[] = "DATE(o.created_at) <= :end_date";
    $params[':end_date'] = $_GET['end_date'];
}

// Filter: Search (Order No / Customer Name)
if (!empty($_GET['search'])) {
    $searchTerm = $_GET['search'];
    if (is_numeric($searchTerm)) {
        $where[] = "(o.id = :search_exact OR o.customer_name LIKE :search_like)";
        $params[':search_exact'] = $searchTerm;
        $params[':search_like'] = "%$searchTerm%";
    } else {
        $where[] = "o.customer_name LIKE :search";
        $params[':search'] = "%$searchTerm%";
    }
}

$where_clause = !empty($where) ? 'WHERE ' . implode(' AND ', $where) : '';

// Calculate Total Sum and Total Commission and Total VAT for filtered orders
$sum_query = "SELECT SUM(total_amount) as total_sum, SUM(commission_amount) as total_commission, SUM(vat) as total_vat FROM orders o $where_clause";
$stmt_sum = $pdo->prepare($sum_query);
$stmt_sum->execute($params);
$sum_data = $stmt_sum->fetch(PDO::FETCH_ASSOC);
$total_sum = (float)($sum_data['total_sum'] ?? 0);
$total_commission = (float)($sum_data['total_commission'] ?? 0);
$total_vat_sum = (float)($sum_data['total_vat'] ?? 0);

// Main Query
$query = "SELECT o.*, ot.name as outlet_name, pt.name as payment_type_name, u.username as cashier_name,
    (SELECT GROUP_CONCAT(CONCAT(p.name, ' x', oi.quantity) SEPARATOR ', ') FROM order_items oi JOIN products p ON oi.product_id = p.id WHERE oi.order_id = o.id) as items_summary 
    FROM orders o 
    LEFT JOIN outlets ot ON o.outlet_id = ot.id
    LEFT JOIN payment_types pt ON o.payment_type_id = pt.id
    LEFT JOIN users u ON o.user_id = u.id
    $where_clause
    ORDER BY o.created_at DESC";

$orders_pagination = paginate_query($pdo, $query, $params);
$orders = $orders_pagination['data'];

$settings = get_company_settings();
$commission_enabled = !empty($settings['commission_enabled']);

include 'includes/header.php';
?>

<div class="d-flex justify-content-between align-items-center mb-4">
    <h2 class="fw-bold mb-0">Order Management</h2>
    <div class="d-flex gap-2">
        <?php if (has_permission('manage_products')): ?>
        <form method="POST" onsubmit="return confirm('Are you sure you want to stop all running promotions? This will end all active promotions by setting their end date to yesterday.');">
            <input type="hidden" name="action" value="stop_promotions">
            <button type="submit" class="btn btn-danger shadow-sm">
                <i class="bi bi-stop-circle me-1"></i> Stop All Promotions
            </button>
        </form>
        <?php endif; ?>
        <span class="badge bg-success bg-opacity-10 text-success border border-success px-3 py-2 rounded-pill d-flex align-items-center">
            <i class="bi bi-circle-fill small me-1"></i> Live
        </span>
    </div>
</div>

<?php if (isset($_GET['error'])): ?>
    <?php if ($_GET['error'] === 'permission_denied'): ?>
    <div class="alert alert-danger border-0 shadow-sm rounded-3">Access Denied: You do not have permission to perform this action.</div>
    <?php elseif ($_GET['error'] === 'delete_failed'): ?>
    <div class="alert alert-danger border-0 shadow-sm rounded-3">Error: Failed to delete order.</div>
    <?php endif; ?>
<?php endif; ?>

<?php if (isset($_GET['success'])): ?>
    <?php if ($_GET['success'] === 'promotions_stopped'): ?>
    <div class="alert alert-success border-0 shadow-sm rounded-3">
        <i class="bi bi-check-circle-fill me-2"></i> All running promotions have been stopped successfully.
    </div>
    <?php elseif ($_GET['success'] === 'order_deleted'): ?>
    <div class="alert alert-success border-0 shadow-sm rounded-3">
        <i class="bi bi-check-circle-fill me-2"></i> Order has been deleted successfully.
    </div>
    <?php endif; ?>
<?php endif; ?>

<!-- Summary Stats -->
<div class="row mb-4">
    <div class="col-md-3">
        <div class="card border-0 shadow-sm">
            <div class="card-body">
                <div class="d-flex align-items-center">
                    <div class="flex-shrink-0 bg-primary bg-opacity-10 text-primary p-3 rounded">
                        <i class="bi bi-currency-dollar fs-4"></i>
                    </div>
                    <div class="flex-grow-1 ms-3">
                        <h6 class="text-muted mb-0 small text-uppercase fw-bold">Total Revenue</h6>
                        <div class="fs-4 fw-bold text-primary"><?= format_currency($total_sum) ?></div>
                    </div>
                </div>
            </div>
        </div>
    </div>
    <div class="col-md-3">
        <div class="card border-0 shadow-sm">
            <div class="card-body">
                <div class="d-flex align-items-center">
                    <div class="flex-shrink-0 bg-warning bg-opacity-10 text-warning p-3 rounded">
                        <i class="bi bi-percent fs-4"></i>
                    </div>
                    <div class="flex-grow-1 ms-3">
                        <h6 class="text-muted mb-0 small text-uppercase fw-bold">Total VAT</h6>
                        <div class="fs-4 fw-bold text-warning"><?= format_currency($total_vat_sum) ?></div>
                    </div>
                </div>
            </div>
        </div>
    </div>
    <div class="col-md-3">
        <div class="card border-0 shadow-sm">
            <div class="card-body">
                <div class="d-flex align-items-center">
                    <div class="flex-shrink-0 bg-success bg-opacity-10 text-success p-3 rounded">
                        <i class="bi bi-receipt fs-4"></i>
                    </div>
                    <div class="flex-grow-1 ms-3">
                        <h6 class="text-muted mb-0 small text-uppercase fw-bold">Total Orders</h6>
                        <div class="fs-4 fw-bold text-success"><?= $orders_pagination['total_rows'] ?></div>
                    </div>
                </div>
            </div>
        </div>
    </div>
    <div class="col-md-3">
        <div class="card border-0 shadow-sm">
            <div class="card-body">
                <div class="d-flex align-items-center">
                    <div class="flex-shrink-0 bg-info bg-opacity-10 text-info p-3 rounded">
                        <i class="bi bi-calendar-event fs-4"></i>
                    </div>
                    <div class="flex-grow-1 ms-3">
                        <h6 class="text-muted mb-0 small text-uppercase fw-bold">Date Range</h6>
                        <div class="small fw-bold">
                            <?= !empty($_GET['start_date']) ? date('M d, Y', strtotime($_GET['start_date'])) : 'Start' ?> 
                            - 
                            <?= !empty($_GET['end_date']) ? date('M d, Y', strtotime($_GET['end_date'])) : 'Today' ?>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- Filters -->
<div class="card border-0 shadow-sm mb-4">
    <div class="card-body bg-light">
        <form method="GET" class="row g-3 align-items-end">
            <div class="col-md-3">
                <label class="form-label small fw-bold text-muted">Outlet</label>
                <select name="outlet_id" class="form-select">
                    <option value="">All Outlets</option>
                    <?php foreach ($outlets as $outlet): ?>
                        <option value="<?= $outlet['id'] ?>" <?= (isset($_GET['outlet_id']) && $_GET['outlet_id'] == $outlet['id']) ? 'selected' : '' ?>>
                            <?= htmlspecialchars($outlet['name']) ?>
                        </option>
                    <?php endforeach; ?>
                </select>
            </div>
            <div class="col-md-3">
                <label class="form-label small fw-bold text-muted">Date Range</label>
                <div class="input-group">
                    <input type="date" name="start_date" class="form-control" value="<?= $_GET['start_date'] ?? '' ?>" placeholder="Start">
                    <span class="input-group-text bg-white border-start-0 border-end-0">-</span>
                    <input type="date" name="end_date" class="form-control" value="<?= $_GET['end_date'] ?? '' ?>" placeholder="End">
                </div>
            </div>
            <div class="col-md-3">
                <label class="form-label small fw-bold text-muted">Search</label>
                <input type="text" name="search" class="form-control" placeholder="Order No / Customer" value="<?= htmlspecialchars($_GET['search'] ?? '') ?>">
            </div>
            <div class="col-md-3">
                <div class="d-flex gap-2">
                    <button type="submit" class="btn btn-primary w-100">
                        <i class="bi bi-filter"></i> Filter
                    </button>
                    <a href="orders.php" class="btn btn-outline-secondary">
                        <i class="bi bi-x-lg"></i>
                    </a>
                </div>
            </div>
        </form>
    </div>
</div>

<div class="card border-0 shadow-sm">
    <div class="card-body p-0">
        <!-- Pagination Controls -->
        <div class="p-3 border-bottom bg-light">
             <?php render_pagination_controls($orders_pagination); ?>
        </div>
        <div class="table-responsive">
            <table class="table table-hover align-middle mb-0">
                <thead class="bg-light">
                    <tr>
                        <th class="ps-4">ID</th>
                        <th>Outlet</th>
                        <th>Cashier</th>
                        <th>Customer</th>
                        <th>Type</th>
                        <th>VAT</th>
                        <th>Total</th>
                        <?php if ($commission_enabled): ?>
                        <th>Commission</th>
                        <?php endif; ?>
                        <th>Payment</th>
                        <th>Status</th>
                        <th>Time</th>
                        <th class="text-end pe-4">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($orders as $order): ?>
                        <tr>
                            <td class="ps-4">#<?= $order['id'] ?></td>
                            <td>
                                <span class="badge bg-white text-dark border">
                                    <i class="bi bi-shop me-1"></i>
                                    <?= htmlspecialchars($order['outlet_name'] ?? 'Unknown') ?>
                                </span>
                            </td>
                            <td>
                                <small class="fw-bold">@<?= htmlspecialchars((string)($order['cashier_name'] ?? 'Guest')) ?></small>
                            </td>
                            <td>
                                <?php if (!empty($order['customer_name'])): ?>
                                    <div><?= htmlspecialchars((string)($order['customer_name'] ?? '')) ?></div>
                                    <?php if (!empty($order['customer_phone'])): ?>
                                        <small class="text-muted"><i class="bi bi-telephone me-1"></i><?= htmlspecialchars((string)($order['customer_phone'] ?? '')) ?></small>
                                    <?php endif; ?>
                                <?php else: ?>
                                    <span class="text-muted small">Guest</span>
                                <?php endif; ?>
                            </td>
                            <td>
                                <?php 
                                    $badge = match($order['order_type']) {
                                        'dine-in' => 'bg-info',
                                        'takeaway' => 'bg-success',
                                        'delivery' => 'bg-warning',
                                        'drive-thru' => 'bg-primary',
                                        default => 'bg-secondary'
                                    };
                                ?>
                                <span class="badge <?= $badge ?> text-dark bg-opacity-25 border border-<?= str_replace('bg-', '', $badge) ?>"><?= ucfirst($order['order_type']) ?></span>
                            </td>
                            <td>
                                <span class="text-muted small"><?= format_currency($order['vat']) ?></span>
                            </td>
                            <td class="fw-bold"><?= format_currency($order['total_amount']) ?></td>
                            <?php if ($commission_enabled): ?>
                            <td>
                                <span class="text-warning fw-bold"><?= format_currency($order['commission_amount']) ?></span>
                            </td>
                            <?php endif; ?>
                            <td>
                                <?php 
                                    $payment_name = $order['payment_type_name'] ?? 'Unpaid';
                                    $payment_badge = match(strtolower($payment_name)) {
                                        'cash' => 'bg-success',
                                        'credit card' => 'bg-primary',
                                        'loyalty redeem' => 'bg-warning',
                                        'bank transfer' => 'bg-info',
                                        'unpaid' => 'bg-secondary',
                                        default => 'bg-secondary'
                                    };
                                ?>
                                <span class="badge <?= $payment_badge ?> text-dark bg-opacity-25 border border-<?= str_replace('bg-', '', $payment_badge) ?>">
                                    <?= htmlspecialchars((string)($payment_name ?? '')) ?>
                                </span>
                            </td>
                            <td>
                                <span class="badge rounded-pill status-<?= $order['status'] ?>">
                                    <?= ucfirst($order['status']) ?>
                                </span>
                            </td>
                            <td class="text-muted small">
                                <div><?= date('M d', strtotime($order['created_at'])) ?></div>
                                <div><?= date('H:i', strtotime($order['created_at'])) ?></div>
                            </td>
                            <td class="text-end pe-4">
                                <div class="d-flex gap-2 justify-content-end align-items-center">
                                    <!-- Status Workflow Buttons -->
                                    <?php if (has_permission('orders_add')): ?>
                                    <form method="POST" class="d-flex gap-1 me-2 border-end pe-2">
                                        <input type="hidden" name="order_id" value="<?= $order['id'] ?>">
                                        <input type="hidden" name="action" value="update_status">
                                        
                                        <?php if ($order['status'] === 'pending'): ?>
                                            <button type="submit" name="status" value="preparing" class="btn btn-sm btn-primary py-0 px-1" title="Start Preparing">
                                                <i class="bi bi-play-fill"></i>
                                            </button>
                                            <button type="submit" name="status" value="cancelled" class="btn btn-sm btn-outline-danger py-0 px-1" title="Cancel Order">
                                                <i class="bi bi-x"></i>
                                            </button>
                                        <?php elseif ($order['status'] === 'preparing'): ?>
                                            <button type="submit" name="status" value="ready" class="btn btn-sm btn-warning text-dark py-0 px-1" title="Mark Ready">
                                                <i class="bi bi-check-circle"></i>
                                            </button>
                                        <?php elseif ($order['status'] === 'ready'): ?>
                                            <button type="submit" name="status" value="completed" class="btn btn-sm btn-success py-0 px-1" title="Complete Order">
                                                <i class="bi bi-check-all"></i>
                                            </button>
                                        <?php endif; ?>
                                    </form>
                                    <?php endif; ?>

                                    <!-- Standard Actions -->
                                    <a href="order_view.php?id=<?= $order['id'] ?>" class="btn-icon-soft" title="View Order">
                                        <i class="bi bi-eye-fill"></i>
                                    </a>
                                    
                                    <?php if (has_permission('orders_add')): ?>
                                    <a href="order_edit.php?id=<?= $order['id'] ?>" class="btn-icon-soft edit" title="Edit Order">
                                        <i class="bi bi-pencil-fill"></i>
                                    </a>
                                    <?php endif; ?>
                                    
                                    <?php if (has_permission('manage_orders')): ?>
                                    <a href="?delete=<?= $order['id'] ?>" class="btn-icon-soft delete" onclick="return confirm('Are you sure you want to delete this order? This action cannot be undone.')" title="Delete Order">
                                        <i class="bi bi-trash-fill"></i>
                                    </a>
                                    <?php endif; ?>
                                </div>
                            </td>
                        </tr>
                    <?php endforeach; ?>
                    <?php if (empty($orders)): ?>
                        <tr>
                            <td colspan="12" class="text-center py-5 text-muted">
                                <i class="bi bi-inbox fs-1 d-block mb-2"></i>
                                No active orders found matching your criteria.
                            </td>
                        </tr>
                    <?php endif; ?>
                </tbody>
            </table>
        </div>
        <!-- Bottom Pagination -->
        <div class="p-3 border-top bg-light">
             <?php render_pagination_controls($orders_pagination); ?>
        </div>
    </div>
</div>

<?php include 'includes/footer.php'; ?>