feuerwehr-vereinsshop/admin/backorders.php

<?php
require_once __DIR__ . '/../config.php';
require_once __DIR__ . '/../includes/functions.php';

// Check admin login
if (!isset($_SESSION['admin_logged_in']) || !$_SESSION['admin_logged_in']) {
    header('Location: login.php');
    exit;
}

$pageTitle = 'Nachbestellungen verwalten';

// Handle availability notification
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['notify_available'])) {
    $reservationId = sanitize($_POST['reservation_id']);
    $result = markBackorderAvailable($reservationId);
    $message = $result['success'] ? 'Kunde wurde informiert, dass die Nachbestellung zur Abholung bereit ist.' : $result['message'];
    $messageType = $result['success'] ? 'success' : 'error';
}

$reservations = getReservations();
$filter = isset($_GET['filter']) ? sanitize($_GET['filter']) : 'pending';
$searchOrderNumber = isset($_GET['order_number']) ? sanitize($_GET['order_number']) : '';

// Filter backorders
$reservations = array_filter($reservations, function($r) {
    return isset($r['type']) && $r['type'] === 'backorder';
});

if ($searchOrderNumber) {
    $reservations = array_filter($reservations, function($r) use ($searchOrderNumber) {
        return stripos($r['id'], $searchOrderNumber) !== false;
    });
} else {
    switch ($filter) {
        case 'pending':
            $reservations = array_filter($reservations, function($r) {
                return !isset($r['backorder_status']) || $r['backorder_status'] !== 'notified';
            });
            break;
    }
}

$reservations = array_reverse($reservations); // Newest first

$canNotifyMap = [];
foreach ($reservations as $reservation) {
    $isNotified = isset($reservation['backorder_status']) && $reservation['backorder_status'] === 'notified';
    $canNotifyMap[$reservation['id']] = !$isNotified && canFulfillReservationItems($reservation['items']);
}

$productsById = [];
foreach (getProducts() as $product) {
    $productsById[$product['id']] = $product;
}

$backorderSummary = [];
foreach ($reservations as $reservation) {
    foreach ($reservation['items'] as $item) {
        $productId = $item['product_id'];
        if (!isset($productsById[$productId])) {
            continue;
        }
        $sizeLabel = isset($item['size']) && $item['size'] !== '' ? $item['size'] : '';
        $key = $productId . '|' . $sizeLabel;
        if (!isset($backorderSummary[$key])) {
            $backorderSummary[$key] = [
                'name' => $productsById[$productId]['name'],
                'size' => $sizeLabel,
                'quantity' => 0
            ];
        }
        $backorderSummary[$key]['quantity'] += (int)$item['quantity'];
    }
}

$summaryRows = array_values($backorderSummary);
usort($summaryRows, function($a, $b) {
    $nameCompare = strcasecmp($a['name'], $b['name']);
    if ($nameCompare !== 0) {
        return $nameCompare;
    }
    return strcasecmp($a['size'], $b['size']);
});

$summaryTotal = 0;
foreach ($summaryRows as $row) {
    $summaryTotal += $row['quantity'];
}

include __DIR__ . '/../includes/header.php';
?>

<div class="admin-header">
    <h2>Nachbestellungen verwalten</h2>
    <div>
        <a href="index.php" class="btn btn-secondary">Zurück zum Dashboard</a>
    </div>
</div>

<?php if (isset($message)): ?>
    <div class="alert alert-<?php echo $messageType; ?>">
        <?php echo htmlspecialchars($message); ?>
    </div>
<?php endif; ?>

<div class="panel">
    <form method="GET" style="display: flex; gap: 1rem; align-items: end; flex-wrap: wrap;">
        <div style="flex: 1; min-width: 200px;">
            <label for="order_number">Bestellnummer suchen:</label>
            <input type="text" id="order_number" name="order_number" value="<?php echo htmlspecialchars($searchOrderNumber); ?>" placeholder="Bestellnummer">
        </div>
        <div>
            <label for="filter">Filter:</label>
            <select id="filter" name="filter">
                <option value="pending" <?php echo $filter === 'pending' ? 'selected' : ''; ?>>Offen</option>
                <option value="all" <?php echo $filter === 'all' ? 'selected' : ''; ?>>Alle</option>
            </select>
        </div>
        <div>
            <button type="submit" class="btn">Filtern</button>
            <a href="backorders.php" class="btn btn-secondary">Zurücksetzen</a>
        </div>
    </form>
</div>

<?php if (!empty($summaryRows)): ?>
    <div class="panel">
        <h3>Übersicht Nachbestellte Artikel</h3>
        <table class="table-compact">
            <thead>
                <tr>
                    <th>Produkt</th>
                    <th>Größe</th>
                    <th>Menge</th>
                </tr>
            </thead>
            <tbody>
                <?php foreach ($summaryRows as $row): ?>
                    <tr>
                        <td><?php echo htmlspecialchars($row['name']); ?></td>
                        <td><?php echo $row['size'] !== '' ? htmlspecialchars($row['size']) : '—'; ?></td>
                        <td><?php echo (int)$row['quantity']; ?></td>
                    </tr>
                <?php endforeach; ?>
            </tbody>
        </table>
        <p class="mt-2"><strong>Gesamt:</strong> <?php echo (int)$summaryTotal; ?> Artikel</p>
    </div>
<?php endif; ?>

<?php if (empty($reservations)): ?>
    <div class="alert alert-info">
        <p>Keine Nachbestellungen gefunden.</p>
    </div>
<?php else: ?>
    <table>
        <thead>
            <tr>
                <th>Bestellnummer</th>
                <th>Kunde</th>
                <th>E-Mail</th>
                <th>Artikel</th>
                <th>Erstellt</th>
                <th>Status</th>
                <th>Aktionen</th>
            </tr>
        </thead>
        <tbody>
            <?php foreach ($reservations as $reservation): ?>
                <tr>
                    <td><strong><?php echo htmlspecialchars($reservation['id']); ?></strong></td>
                    <td><?php echo htmlspecialchars($reservation['customer_name']); ?></td>
                    <td><?php echo htmlspecialchars($reservation['customer_email']); ?></td>
                    <td>
                        <?php
                        $itemCount = 0;
                        foreach ($reservation['items'] as $item) {
                            $itemCount += $item['quantity'];
                        }
                        echo $itemCount . ' Artikel';
                        ?>
                    </td>
                    <td><?php echo formatDate($reservation['created']); ?></td>
                    <td>
                        <?php
                        if (isset($reservation['backorder_status']) && $reservation['backorder_status'] === 'notified') {
                            echo '<span class="status status-notified">Informiert</span>';
                        } else {
                            echo '<span class="status status-open">Offen</span>';
                        }
                        ?>
                    </td>
                    <td>
                        <?php if ((!isset($reservation['backorder_status']) || $reservation['backorder_status'] !== 'notified') && canFulfillReservationItems($reservation['items'])): ?>
                            <form method="POST" style="display: inline;" onsubmit="return confirm('Kunden informieren, dass die Nachbestellung zur Abholung bereit ist?');">
                                <input type="hidden" name="reservation_id" value="<?php echo htmlspecialchars($reservation['id']); ?>">
                                <button type="submit" name="notify_available" class="btn btn-small">Abholung bereit</button>
                            </form>
                        <?php endif; ?>
                        <button onclick="showDetails('<?php echo htmlspecialchars($reservation['id']); ?>')" class="btn btn-secondary btn-small">Details</button>
                    </td>
                </tr>
            <?php endforeach; ?>
        </tbody>
    </table>
<?php endif; ?>

<!-- Details Modal -->
<div id="detailsModal" class="modal">
    <div class="modal-content">
        <button onclick="closeDetails()" class="btn btn-small modal-close">Schließen</button>
        <div id="detailsContent"></div>
        <form method="POST" id="notifyForm" style="margin-top: 1.5rem; display: none;" onsubmit="return confirm('Kunden informieren, dass die Nachbestellung zur Abholung bereit ist?');">
            <input type="hidden" name="reservation_id" id="notifyReservationId" value="">
            <button type="submit" name="notify_available" class="btn">Abholung bereit</button>
        </form>
    </div>
</div>

<script>
function showDetails(reservationId) {
    const reservations = <?php echo json_encode(getReservations()); ?>;
    const reservation = reservations.find(r => r.id === reservationId);
    const canNotifyMap = <?php echo json_encode($canNotifyMap); ?>;
    
    if (!reservation) return;
    
    let itemsHtml = '<h3>Artikel:</h3><ul>';
    reservation.items.forEach(item => {
        const product = <?php echo json_encode(getProducts()); ?>.find(p => p.id == item.product_id);
        if (product) {
            let sizeInfo = '';
            if (item.size && item.size !== '') {
                sizeInfo = ` - Größe: ${item.size}`;
            }
            itemsHtml += `<li>${product.name}${sizeInfo} - Menge: ${item.quantity}</li>`;
        }
    });
    itemsHtml += '</ul>';
    
    const statusText = reservation.backorder_status === 'notified' ? 'Informiert' : 'Offen';
    const statusClass = reservation.backorder_status === 'notified' ? 'status-notified' : 'status-open';
    const html = `
        <h2>Nachbestellungsdetails</h2>
        <p><strong>Bestellnummer:</strong> <strong class="order-highlight">${reservation.id}</strong></p>
        <p><strong>Kunde:</strong> ${reservation.customer_name}</p>
        <p><strong>E-Mail:</strong> ${reservation.customer_email}</p>
        <p><strong>Erstellt:</strong> ${reservation.created}</p>
        <p><strong>Status:</strong> <span class="status ${statusClass}">${statusText}</span></p>
        ${itemsHtml}
    `;
    
    document.getElementById('detailsContent').innerHTML = html;
    const notifyForm = document.getElementById('notifyForm');
    const notifyReservationId = document.getElementById('notifyReservationId');
    if (canNotifyMap[reservation.id]) {
        notifyReservationId.value = reservation.id;
        notifyForm.style.display = 'block';
    } else {
        notifyReservationId.value = '';
        notifyForm.style.display = 'none';
    }
    document.getElementById('detailsModal').style.display = 'flex';
}

function closeDetails() {
    document.getElementById('detailsModal').style.display = 'none';
}
</script>

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