<?php
/**
 * Tom's Java Jive - Admin Order Detail
 */
ob_start();
$pageTitle = 'Order Details';
require_once __DIR__ . '/includes/header.php';
require_once __DIR__ . '/../includes/square.php';

$orderId = $_GET['id'] ?? '';

if (empty($orderId)) {
    header('Location: /admin/orders.php');
    exit;
}

$order = db()->fetch("SELECT * FROM orders WHERE order_id = :id", ['id' => $orderId]);

if (!$order) {
    setFlash('error', 'Order not found');
    header('Location: /admin/orders.php');
    exit;
}

// Handle status update
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $action = $_POST['action'] ?? '';

    if ($action === 'update_status') {
        $status = $_POST['status'] ?? '';
        $trackingNumber = $_POST['tracking_number'] ?? '';

        $updateData = ['order_status' => $status];
        if ($trackingNumber) {
            $updateData['tracking_number'] = $trackingNumber;
        }

        db()->update('orders', $updateData, 'order_id = :id', ['id' => $orderId]);
        setFlash('success', 'Order status updated');
        header('Location: /admin/order.php?id=' . $orderId);
        exit;
    }

    if ($action === 'add_note') {
        $note = trim($_POST['note'] ?? '');
        if ($note) {
            $existingNotes = $order['notes'] ?? '';
            $newNote = '[' . date('M j, Y g:i A') . '] ' . $note;
            $allNotes = $existingNotes ? $existingNotes . "\n" . $newNote : $newNote;

            db()->update('orders', ['notes' => $allNotes], 'order_id = :id', ['id' => $orderId]);
            setFlash('success', 'Note added');
            header('Location: /admin/order.php?id=' . $orderId);
            exit;
        }
    }

    if ($action === 'process_refund') {
        $refundAmount = (float) ($_POST['refund_amount'] ?? 0);
        $reason = trim($_POST['refund_reason'] ?? '');

        if ($order['payment_method'] !== 'square' || empty($order['square_payment_id'])) {
            setFlash('error', 'This order has no Square payment to refund.');
            header('Location: /admin/order.php?id=' . $orderId);
            exit;
        }
        if ($order['payment_status'] !== 'paid' && $order['payment_status'] !== 'partially_refunded') {
            setFlash('error', 'Only paid orders can be refunded.');
            header('Location: /admin/order.php?id=' . $orderId);
            exit;
        }
        if ($refundAmount <= 0 || $refundAmount > (float) $order['total']) {
            setFlash('error', 'Invalid refund amount.');
            header('Location: /admin/order.php?id=' . $orderId);
            exit;
        }

        try {
            $result = squareRefundPayment($order['square_payment_id'], $refundAmount, $reason ?: ('Order #' . $order['order_number']));
            $refund = $result['refund'] ?? [];
            $refundStatus = $refund['status'] ?? '';

            if (in_array($refundStatus, ['PENDING', 'COMPLETED'], true)) {
                $isFullRefund = $refundAmount >= (float) $order['total'];
                $newPaymentStatus = $isFullRefund ? 'refunded' : 'partially_refunded';

                db()->update('orders',
                    ['payment_status' => $newPaymentStatus, 'order_status' => $isFullRefund ? 'refunded' : $order['order_status']],
                    'order_id = :id',
                    ['id' => $orderId]
                );

                // Restore any wallet credit that was applied, proportionally on a full refund
                if ($isFullRefund && !empty($order['wallet_amount_used']) && (float) $order['wallet_amount_used'] > 0 && !empty($order['customer_id'])) {
                    $walletAmount = (float) $order['wallet_amount_used'];
                    $cust = db()->fetch("SELECT wallet_balance FROM customers WHERE customer_id = :id", ['id' => $order['customer_id']]);
                    if ($cust) {
                        $newBalance = (float) $cust['wallet_balance'] + $walletAmount;
                        db()->update('customers', ['wallet_balance' => $newBalance], 'customer_id = :id', ['id' => $order['customer_id']]);
                        db()->insert('wallet_transactions', [
                            'transaction_id' => generateId('wt_'),
                            'customer_id'    => $order['customer_id'],
                            'amount'         => $walletAmount,
                            'balance_after'  => $newBalance,
                            'type'           => 'refund',
                            'description'    => 'Refund for Order #' . $order['order_number'],
                        ]);
                    }
                }

                $existingNotes = $order['notes'] ?? '';
                $newNote = '[' . date('M j, Y g:i A') . '] Refunded ' . formatCurrency($refundAmount)
                    . ' via Square (refund ID: ' . ($refund['id'] ?? 'unknown') . ')'
                    . ($reason ? ' — ' . $reason : '');
                $allNotes = $existingNotes ? $existingNotes . "\n" . $newNote : $newNote;
                db()->update('orders', ['notes' => $allNotes], 'order_id = :id', ['id' => $orderId]);

                setFlash('success', formatCurrency($refundAmount) . ' refunded successfully.');
            } else {
                setFlash('error', 'Refund did not complete (status: ' . $refundStatus . ').');
            }
        } catch (Exception $e) {
            setFlash('error', 'Refund failed: ' . $e->getMessage());
        }

        header('Location: /admin/order.php?id=' . $orderId);
        exit;
    }
}

$items = json_decode($order['items'], true) ?? [];
$shippingAddress = json_decode($order['shipping_address'], true) ?? [];

$statuses = ['pending', 'confirmed', 'processing', 'shipped', 'delivered', 'cancelled', 'refunded'];
$canRefund = $order['payment_method'] === 'square'
    && !empty($order['square_payment_id'])
    && in_array($order['payment_status'], ['paid', 'partially_refunded'], true);
?>

<div class="page-header">
    <div style="display: flex; align-items: center; gap: 1rem;">
        <a href="/admin/orders.php" class="btn btn-secondary">
            <i class="fas fa-arrow-left"></i>
        </a>
        <h1 class="page-title">Order #<?= htmlspecialchars($order['order_number']) ?></h1>
        <?php if ($order['is_pos_order']): ?>
            <span class="badge badge-primary">POS Order</span>
        <?php endif; ?>
    </div>
    <div style="display: flex; gap: 0.5rem;">
        <button class="btn btn-secondary" onclick="window.print()">
            <i class="fas fa-print"></i> Print
        </button>
    </div>
</div>

<?php if (hasFlash('success')): ?>
    <div class="alert alert-success"><i class="fas fa-check-circle"></i> <?= getFlash('success') ?></div>
<?php endif; ?>
<?php if (hasFlash('error')): ?>
    <div class="alert alert-error"><i class="fas fa-exclamation-circle"></i> <?= getFlash('error') ?></div>
<?php endif; ?>

<div style="display: grid; grid-template-columns: 2fr 1fr; gap: 1.5rem;">
    <!-- Main Column -->
    <div>
        <!-- Order Items -->
        <div class="admin-card">
            <div class="admin-card-header">
                <h3 class="admin-card-title">Order Items</h3>
            </div>
            <div class="admin-card-body" style="padding: 0;">
                <table class="admin-table">
                    <thead>
                        <tr>
                            <th>Product</th>
                            <th>Price</th>
                            <th>Qty</th>
                            <th style="text-align: right;">Total</th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php foreach ($items as $item): ?>
                            <tr>
                                <td>
                                    <?php if (isset($item['product_id'])): ?>
                                        <a href="/admin/product-edit.php?id=<?= $item['product_id'] ?>">
                                            <?= htmlspecialchars($item['name']) ?>
                                        </a>
                                    <?php else: ?>
                                        <?= htmlspecialchars($item['name']) ?>
                                    <?php endif; ?>
                                </td>
                                <td><?= formatCurrency($item['price']) ?></td>
                                <td><?= $item['quantity'] ?></td>
                                <td style="text-align: right;"><?= formatCurrency($item['total']) ?></td>
                            </tr>
                        <?php endforeach; ?>
                    </tbody>
                    <tfoot>
                        <tr>
                            <td colspan="3" style="text-align: right;">Subtotal</td>
                            <td style="text-align: right;"><?= formatCurrency($order['subtotal']) ?></td>
                        </tr>
                        <?php if ($order['shipping_cost'] > 0): ?>
                            <tr>
                                <td colspan="3" style="text-align: right;">Shipping</td>
                                <td style="text-align: right;"><?= formatCurrency($order['shipping_cost']) ?></td>
                            </tr>
                        <?php endif; ?>
                        <?php if (($order['tax'] ?? 0) > 0): ?>
                            <tr>
                                <td colspan="3" style="text-align: right;">Tax</td>
                                <td style="text-align: right;"><?= formatCurrency($order['tax']) ?></td>
                            </tr>
                        <?php endif; ?>
                        <?php if (($order['discount'] ?? 0) > 0): ?>
                            <tr>
                                <td colspan="3" style="text-align: right;">Discount</td>
                                <td style="text-align: right; color: var(--admin-success);">-<?= formatCurrency($order['discount']) ?></td>
                            </tr>
                        <?php endif; ?>
                        <?php if (($order['wallet_amount_used'] ?? 0) > 0): ?>
                            <tr>
                                <td colspan="3" style="text-align: right;">Wallet / Gift Card</td>
                                <td style="text-align: right; color: var(--admin-success);">-<?= formatCurrency($order['wallet_amount_used']) ?></td>
                            </tr>
                        <?php endif; ?>
                        <tr style="font-size: 1.125rem; font-weight: 600;">
                            <td colspan="3" style="text-align: right;">Total</td>
                            <td style="text-align: right;"><?= formatCurrency($order['total']) ?></td>
                        </tr>
                    </tfoot>
                </table>
            </div>
        </div>

        <!-- Notes -->
        <div class="admin-card">
            <div class="admin-card-header">
                <h3 class="admin-card-title">Order Notes</h3>
            </div>
            <div class="admin-card-body">
                <?php if ($order['notes']): ?>
                    <pre style="white-space: pre-wrap; font-family: inherit; margin-bottom: 1rem; padding: 1rem; background: var(--admin-bg); border-radius: var(--admin-radius);"><?= htmlspecialchars($order['notes']) ?></pre>
                <?php else: ?>
                    <p class="text-muted" style="margin-bottom: 1rem;">No notes yet.</p>
                <?php endif; ?>

                <form method="POST">
                    <input type="hidden" name="action" value="add_note">
                    <div class="form-group mb-0">
                        <div style="display: flex; gap: 0.5rem;">
                            <input type="text" name="note" class="form-input" placeholder="Add a note...">
                            <button type="submit" class="btn btn-secondary">Add Note</button>
                        </div>
                    </div>
                </form>
            </div>
        </div>

        <?php if ($canRefund): ?>
        <!-- Refund -->
        <div class="admin-card">
            <div class="admin-card-header">
                <h3 class="admin-card-title">Process Refund</h3>
            </div>
            <div class="admin-card-body">
                <form method="POST" onsubmit="return confirm('Refund ' + document.getElementById('refund_amount').value + ' via Square? This cannot be undone.');">
                    <input type="hidden" name="action" value="process_refund">
                    <div class="form-group">
                        <label class="form-label">Amount</label>
                        <input type="number" step="0.01" min="0.01" max="<?= $order['total'] ?>" name="refund_amount" id="refund_amount" class="form-input" value="<?= $order['total'] ?>" required>
                        <small class="text-muted">Up to <?= formatCurrency($order['total']) ?> (full order total). Enter a lower amount for a partial refund.</small>
                    </div>
                    <div class="form-group">
                        <label class="form-label">Reason (optional)</label>
                        <input type="text" name="refund_reason" class="form-input" placeholder="e.g. damaged item, customer request">
                    </div>
                    <button type="submit" class="btn btn-secondary btn-block">
                        <i class="fas fa-undo"></i> Refund via Square
                    </button>
                </form>
            </div>
        </div>
        <?php endif; ?>
    </div>

    <!-- Sidebar -->
    <div>
        <!-- Status -->
        <div class="admin-card">
            <div class="admin-card-header">
                <h3 class="admin-card-title">Order Status</h3>
            </div>
            <div class="admin-card-body">
                <form method="POST">
                    <input type="hidden" name="action" value="update_status">

                    <div class="form-group">
                        <label class="form-label">Status</label>
                        <select name="status" class="form-select">
                            <?php foreach ($statuses as $s): ?>
                                <option value="<?= $s ?>" <?= $order['order_status'] === $s ? 'selected' : '' ?>>
                                    <?= ucfirst($s) ?>
                                </option>
                            <?php endforeach; ?>
                        </select>
                    </div>

                    <div class="form-group">
                        <label class="form-label">Tracking Number</label>
                        <input type="text" name="tracking_number" class="form-input" value="<?= htmlspecialchars($order['tracking_number'] ?? '') ?>">
                    </div>

                    <button type="submit" class="btn btn-primary btn-block">Update Status</button>
                </form>
            </div>
        </div>

        <!-- Customer -->
        <div class="admin-card">
            <div class="admin-card-header">
                <h3 class="admin-card-title">Customer</h3>
            </div>
            <div class="admin-card-body">
                <p><strong><?= htmlspecialchars($order['customer_name']) ?></strong></p>
                <p><?= htmlspecialchars($order['customer_email']) ?></p>
                <?php if ($order['customer_phone']): ?>
                    <p><?= htmlspecialchars($order['customer_phone']) ?></p>
                <?php endif; ?>

                <?php if ($order['customer_id']): ?>
                    <a href="/admin/customers.php?id=<?= $order['customer_id'] ?>" class="btn btn-sm btn-secondary mt-1">
                        View Customer
                    </a>
                <?php endif; ?>
            </div>
        </div>

        <!-- Shipping Address -->
        <?php if (!empty($shippingAddress) && ($shippingAddress['type'] ?? '') !== 'pickup'): ?>
            <div class="admin-card">
                <div class="admin-card-header">
                    <h3 class="admin-card-title">Shipping Address</h3>
                </div>
                <div class="admin-card-body">
                    <p>
                        <?= htmlspecialchars($shippingAddress['address'] ?? '') ?><br>
                        <?= htmlspecialchars($shippingAddress['city'] ?? '') ?>,
                        <?= htmlspecialchars($shippingAddress['state'] ?? '') ?>
                        <?= htmlspecialchars($shippingAddress['zip'] ?? '') ?>
                    </p>
                </div>
            </div>
        <?php endif; ?>

        <!-- Payment -->
        <div class="admin-card">
            <div class="admin-card-header">
                <h3 class="admin-card-title">Payment</h3>
            </div>
            <div class="admin-card-body">
                <div style="display: flex; justify-content: space-between; margin-bottom: 0.5rem;">
                    <span>Method</span>
                    <span><?= ucfirst($order['payment_method'] ?? 'N/A') ?></span>
                </div>
                <div style="display: flex; justify-content: space-between; margin-bottom: 0.5rem;">
                    <span>Status</span>
                    <?php
                    $paymentClass = match($order['payment_status']) {
                        'paid' => 'success',
                        'failed' => 'error',
                        'refunded', 'partially_refunded' => 'warning',
                        default => 'primary'
                    };
                    ?>
                    <span class="badge badge-<?= $paymentClass ?>"><?= ucfirst(str_replace('_', ' ', $order['payment_status'])) ?></span>
                </div>
                <?php if (!empty($order['square_payment_id'])): ?>
                    <div style="display: flex; justify-content: space-between;">
                        <span>Square Payment ID</span>
                        <span class="text-muted" style="font-size: 0.8rem;"><?= htmlspecialchars(substr($order['square_payment_id'], 0, 20)) ?></span>
                    </div>
                <?php elseif ($order['stripe_payment_intent']): ?>
                    <div style="display: flex; justify-content: space-between;">
                        <span>Stripe ID</span>
                        <span class="text-muted" style="font-size: 0.8rem;"><?= htmlspecialchars(substr($order['stripe_payment_intent'], 0, 20)) ?>...</span>
                    </div>
                <?php endif; ?>
            </div>
        </div>

        <!-- Timeline -->
        <div class="admin-card">
            <div class="admin-card-header">
                <h3 class="admin-card-title">Timeline</h3>
            </div>
            <div class="admin-card-body">
                <div style="display: flex; justify-content: space-between; margin-bottom: 0.5rem;">
                    <span class="text-muted">Created</span>
                    <span><?= formatDateTime($order['created_at']) ?></span>
                </div>
                <?php if ($order['updated_at'] && $order['updated_at'] !== $order['created_at']): ?>
                    <div style="display: flex; justify-content: space-between;">
                        <span class="text-muted">Updated</span>
                        <span><?= formatDateTime($order['updated_at']) ?></span>
                    </div>
                <?php endif; ?>
            </div>
        </div>
    </div>
</div>

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