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// admin/order_edit.php
require_once '../includes/db.php';
require_once '../includes/functions.php';

$id = isset($_GET['id']) ? (int)$_GET['id'] : 0;

try {
    $stmt = $pdo->prepare("SELECT * FROM orders WHERE id = ?");
    $stmt->execute([$id]);
    $order = $stmt->fetch();
    
    if (!$order) {
        header("Location: orders.php");
        exit;
    }
} catch (PDOException $e) {
    die("Database lookup error: " . $e->getMessage());
}

$error = '';
$success = '';

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $customer_name = trim($_POST['customer_name'] ?? '');
    $email = trim($_POST['email'] ?? '');
    $phone = trim($_POST['phone'] ?? '');
    $whatsapp = trim($_POST['whatsapp'] ?? '');
    $address = trim($_POST['address'] ?? '');
    $curtain_type = trim($_POST['curtain_type'] ?? '');
    $fabric = trim($_POST['fabric'] ?? '');
    $color = trim($_POST['color'] ?? '');
    $width = filter_var($_POST['width'] ?? null, FILTER_VALIDATE_FLOAT);
    $height = filter_var($_POST['height'] ?? null, FILTER_VALIDATE_FLOAT);
    $quantity = filter_var($_POST['quantity'] ?? 1, FILTER_VALIDATE_INT);
    $notes = trim($_POST['notes'] ?? '');
    $status = trim($_POST['status'] ?? '');

    // Form validations
    if (empty($customer_name) || empty($email) || empty($phone) || empty($whatsapp) || empty($address) || 
        empty($curtain_type) || empty($fabric) || empty($color) || $width === false || $height === false || $quantity === false || empty($status)) {
        
        $error = 'Please fill in all required fields with valid values.';
    } elseif (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
        $error = 'Please enter a valid email address.';
    } elseif ($width <= 0 || $height <= 0 || $quantity <= 0) {
        $error = 'Width, Height, and Quantity must be positive values.';
    } else {
        try {
            $sql = "UPDATE orders SET 
                        customer_name = :customer_name,
                        email = :email,
                        phone = :phone,
                        whatsapp = :whatsapp,
                        address = :address,
                        curtain_type = :curtain_type,
                        fabric = :fabric,
                        color = :color,
                        width = :width,
                        height = :height,
                        quantity = :quantity,
                        notes = :notes,
                        status = :status
                    WHERE id = :id";
                    
            $update_stmt = $pdo->prepare($sql);
            $update_stmt->execute([
                ':customer_name' => $customer_name,
                ':email' => $email,
                ':phone' => $phone,
                ':whatsapp' => $whatsapp,
                ':address' => $address,
                ':curtain_type' => $curtain_type,
                ':fabric' => $fabric,
                ':color' => $color,
                ':width' => $width,
                ':height' => $height,
                ':quantity' => $quantity,
                ':notes' => $notes,
                ':status' => $status,
                ':id' => $id
            ]);
            
            $success = 'Order updated successfully!';
            
            // Reload order specs
            $stmt = $pdo->prepare("SELECT * FROM orders WHERE id = ?");
            $stmt->execute([$id]);
            $order = $stmt->fetch();
            
        } catch (PDOException $e) {
            $error = 'Failed to update order: ' . $e->getMessage();
        }
    }
}

include '../includes/admin_header.php';
?>

<div class="mb-4 d-flex justify-content-between align-items-center">
    <a href="order_detail.php?id=<?php echo $order['id']; ?>" class="btn btn-outline-secondary btn-sm">
        <i class="fas fa-arrow-left me-2"></i>Back to Details
    </a>
    <span class="text-muted font-monospace small">Editing Order: <?php echo s($order['order_no']); ?></span>
</div>

<?php if (!empty($error)): ?>
    <div class="alert alert-danger border-0 shadow-sm mb-4"><i class="fas fa-times-circle me-2"></i><?php echo $error; ?></div>
<?php endif; ?>

<?php if (!empty($success)): ?>
    <div class="alert alert-success border-0 shadow-sm mb-4"><i class="fas fa-check-circle me-2"></i><?php echo $success; ?></div>
<?php endif; ?>

<div class="card premium-card mb-5">
    <div class="card-header-royal">
        <h5 class="mb-0"><i class="fas fa-edit me-2"></i>Modify Order Specifications</h5>
    </div>
    <div class="card-body p-4 p-md-5">
        <form method="POST" action="order_edit.php?id=<?php echo $order['id']; ?>">
            
            <!-- 1. Customer Details -->
            <h6 class="text-royal fw-bold mb-3 pb-2 border-bottom"><i class="fas fa-user-edit me-2"></i>1. Customer Information</h6>
            <div class="row g-3 mb-4">
                <div class="col-md-6">
                    <label for="customer_name" class="form-label">Customer Name</label>
                    <input type="text" class="form-control" id="customer_name" name="customer_name" required value="<?php echo s($order['customer_name']); ?>">
                </div>
                <div class="col-md-6">
                    <label for="email" class="form-label">Email Address</label>
                    <input type="email" class="form-control" id="email" name="email" required value="<?php echo s($order['email']); ?>">
                </div>
                <div class="col-md-6">
                    <label for="phone" class="form-label">Mobile Number</label>
                    <input type="text" class="form-control" id="phone" name="phone" required value="<?php echo s($order['phone']); ?>">
                </div>
                <div class="col-md-6">
                    <label for="whatsapp" class="form-label">WhatsApp Number</label>
                    <input type="text" class="form-control" id="whatsapp" name="whatsapp" required value="<?php echo s($order['whatsapp']); ?>">
                </div>
                <div class="col-12">
                    <label for="address" class="form-label">Delivery/Fitting Address</label>
                    <textarea class="form-control" id="address" name="address" rows="3" required><?php echo s($order['address']); ?></textarea>
                </div>
            </div>

            <!-- 2. Product Specifications -->
            <h6 class="text-royal fw-bold mb-3 pb-2 border-bottom"><i class="fas fa-sliders-h me-2"></i>2. Product Specifications & Sizes</h6>
            <div class="row g-3 mb-4">
                <div class="col-md-4">
                    <label for="curtain_type" class="form-label">Curtain Type</label>
                    <select class="form-select" id="curtain_type" name="curtain_type" required>
                        <option value="Eyelet / Ring Top" <?php echo $order['curtain_type'] == 'Eyelet / Ring Top' ? 'selected' : ''; ?>>Eyelet / Ring Top</option>
                        <option value="Pinch Pleat" <?php echo $order['curtain_type'] == 'Pinch Pleat' ? 'selected' : ''; ?>>Pinch Pleat</option>
                        <option value="Pencil Pleat" <?php echo $order['curtain_type'] == 'Pencil Pleat' ? 'selected' : ''; ?>>Pencil Pleat</option>
                        <option value="Goblet Pleat" <?php echo $order['curtain_type'] == 'Goblet Pleat' ? 'selected' : ''; ?>>Goblet Pleat</option>
                        <option value="Tab Top" <?php echo $order['curtain_type'] == 'Tab Top' ? 'selected' : ''; ?>>Tab Top</option>
                        <option value="Rod Pocket" <?php echo $order['curtain_type'] == 'Rod Pocket' ? 'selected' : ''; ?>>Rod Pocket</option>
                        <option value="Wave Fold" <?php echo $order['curtain_type'] == 'Wave Fold' ? 'selected' : ''; ?>>Wave Fold</option>
                    </select>
                </div>
                <div class="col-md-4">
                    <label for="fabric" class="form-label">Fabric Type</label>
                    <select class="form-select" id="fabric" name="fabric" required>
                        <option value="Luxury Velvet" <?php echo $order['fabric'] == 'Luxury Velvet' ? 'selected' : ''; ?>>Luxury Velvet</option>
                        <option value="Pure Linen" <?php echo $order['fabric'] == 'Pure Linen' ? 'selected' : ''; ?>>Pure Linen</option>
                        <option value="Premium Cotton" <?php echo $order['fabric'] == 'Premium Cotton' ? 'selected' : ''; ?>>Premium Cotton</option>
                        <option value="Polyester Blend" <?php echo $order['fabric'] == 'Polyester Blend' ? 'selected' : ''; ?>>Polyester Blend</option>
                        <option value="Royal Silk" <?php echo $order['fabric'] == 'Royal Silk' ? 'selected' : ''; ?>>Royal Silk</option>
                        <option value="Thermal Blackout" <?php echo $order['fabric'] == 'Thermal Blackout' ? 'selected' : ''; ?>>Thermal Blackout</option>
                        <option value="Sheer Lace" <?php echo $order['fabric'] == 'Sheer Lace' ? 'selected' : ''; ?>>Sheer Lace</option>
                    </select>
                </div>
                <div class="col-md-4">
                    <label for="color" class="form-label">Color</label>
                    <select class="form-select" id="color" name="color" required>
                        <option value="Royal Blue" <?php echo $order['color'] == 'Royal Blue' ? 'selected' : ''; ?>>Royal Blue</option>
                        <option value="Classic Gold" <?php echo $order['color'] == 'Classic Gold' ? 'selected' : ''; ?>>Classic Gold</option>
                        <option value="Pearl White" <?php echo $order['color'] == 'Pearl White' ? 'selected' : ''; ?>>Pearl White</option>
                        <option value="Charcoal Gray" <?php echo $order['color'] == 'Charcoal Gray' ? 'selected' : ''; ?>>Charcoal Gray</option>
                        <option value="Cream / Beige" <?php echo $order['color'] == 'Cream / Beige' ? 'selected' : ''; ?>>Cream / Beige</option>
                        <option value="Emerald Green" <?php echo $order['color'] == 'Emerald Green' ? 'selected' : ''; ?>>Emerald Green</option>
                        <option value="Wine Red" <?php echo $order['color'] == 'Wine Red' ? 'selected' : ''; ?>>Wine Red</option>
                    </select>
                </div>
                <div class="col-md-4">
                    <label for="width" class="form-label">Width (inches)</label>
                    <input type="number" step="0.1" min="1" class="form-control" id="width" name="width" required value="<?php echo s($order['width']); ?>">
                </div>
                <div class="col-md-4">
                    <label for="height" class="form-label">Height (inches)</label>
                    <input type="number" step="0.1" min="1" class="form-control" id="height" name="height" required value="<?php echo s($order['height']); ?>">
                </div>
                <div class="col-md-4">
                    <label for="quantity" class="form-label">Quantity</label>
                    <input type="number" min="1" class="form-control" id="quantity" name="quantity" required value="<?php echo (int)$order['quantity']; ?>">
                </div>
            </div>

            <!-- 3. Status & Notes -->
            <h6 class="text-royal fw-bold mb-3 pb-2 border-bottom"><i class="fas fa-tasks me-2"></i>3. Order Tracking & Notes</h6>
            <div class="row g-3 mb-4">
                <div class="col-md-6">
                    <label for="status" class="form-label">Order Status</label>
                    <select class="form-select" id="status" name="status" required>
                        <option value="Pending" <?php echo $order['status'] == 'Pending' ? 'selected' : ''; ?>>Pending</option>
                        <option value="Confirmed" <?php echo $order['status'] == 'Confirmed' ? 'selected' : ''; ?>>Confirmed</option>
                        <option value="Processing" <?php echo $order['status'] == 'Processing' ? 'selected' : ''; ?>>Processing</option>
                        <option value="Completed" <?php echo $order['status'] == 'Completed' ? 'selected' : ''; ?>>Completed</option>
                        <option value="Cancelled" <?php echo $order['status'] == 'Cancelled' ? 'selected' : ''; ?>>Cancelled</option>
                    </select>
                </div>
                <div class="col-md-6">
                    <label for="notes" class="form-label">Special Notes / Requirements</label>
                    <textarea class="form-control" id="notes" name="notes" rows="3"><?php echo s($order['notes']); ?></textarea>
                </div>
            </div>

            <div class="d-flex justify-content-end gap-2 border-top pt-4">
                <a href="order_detail.php?id=<?php echo $order['id']; ?>" class="btn btn-outline-secondary px-4">Cancel</a>
                <button type="submit" class="btn btn-royal px-5">Save Changes</button>
            </div>
            
        </form>
    </div>
</div>

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