<?php
include 'auth.php';
include '../includes/db.php';

header('Content-Type: application/json');

if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    $action = $_POST['action'] ?? '';
    $image_id = intval($_POST['image_id'] ?? 0);
    
    if ($image_id <= 0) {
        echo json_encode(['success' => false, 'message' => 'معرف الصورة غير صحيح']);
        exit;
    }
    
    switch ($action) {
        case 'delete':
            // Get image info before deletion
            $stmt = $conn->prepare("SELECT image_name, car_id FROM car_images WHERE id = ?");
            $stmt->bind_param("i", $image_id);
            $stmt->execute();
            $result = $stmt->get_result();
            
            if ($result->num_rows === 1) {
                $image = $result->fetch_assoc();
                
                // Delete the image file
                $image_path = '../uploads/cars/' . $image['image_name'];
                if (file_exists($image_path)) {
                    unlink($image_path);
                }
                
                // Delete from database
                $delete_stmt = $conn->prepare("DELETE FROM car_images WHERE id = ?");
                $delete_stmt->bind_param("i", $image_id);
                
                if ($delete_stmt->execute()) {
                    // If this was the primary image, set another image as primary
                    $check_primary = $conn->prepare("SELECT COUNT(*) as count FROM car_images WHERE car_id = ? AND is_primary = 1");
                    $check_primary->bind_param("i", $image['car_id']);
                    $check_primary->execute();
                    $primary_result = $check_primary->get_result();
                    $primary_count = $primary_result->fetch_assoc()['count'];
                    
                    if ($primary_count == 0) {
                        // Set the first remaining image as primary
                        $set_primary = $conn->prepare("UPDATE car_images SET is_primary = 1 WHERE car_id = ? ORDER BY sort_order ASC LIMIT 1");
                        $set_primary->bind_param("i", $image['car_id']);
                        $set_primary->execute();
                        $set_primary->close();
                    }
                    
                    $check_primary->close();
                    echo json_encode(['success' => true, 'message' => 'تم حذف الصورة بنجاح']);
                } else {
                    echo json_encode(['success' => false, 'message' => 'فشل في حذف الصورة من قاعدة البيانات']);
                }
                
                $delete_stmt->close();
            } else {
                echo json_encode(['success' => false, 'message' => 'الصورة غير موجودة']);
            }
            
            $stmt->close();
            break;
            
        case 'set_primary':
            // Get car_id for this image
            $stmt = $conn->prepare("SELECT car_id FROM car_images WHERE id = ?");
            $stmt->bind_param("i", $image_id);
            $stmt->execute();
            $result = $stmt->get_result();
            
            if ($result->num_rows === 1) {
                $image = $result->fetch_assoc();
                $car_id = $image['car_id'];
                
                // Start transaction
                $conn->begin_transaction();
                
                try {
                    // Remove primary status from all images of this car
                    $remove_primary = $conn->prepare("UPDATE car_images SET is_primary = 0 WHERE car_id = ?");
                    $remove_primary->bind_param("i", $car_id);
                    $remove_primary->execute();
                    $remove_primary->close();
                    
                    // Set this image as primary
                    $set_primary = $conn->prepare("UPDATE car_images SET is_primary = 1 WHERE id = ?");
                    $set_primary->bind_param("i", $image_id);
                    $set_primary->execute();
                    $set_primary->close();
                    
                    $conn->commit();
                    echo json_encode(['success' => true, 'message' => 'تم تعيين الصورة الرئيسية بنجاح']);
                    
                } catch (Exception $e) {
                    $conn->rollback();
                    echo json_encode(['success' => false, 'message' => 'فشل في تعيين الصورة الرئيسية']);
                }
            } else {
                echo json_encode(['success' => false, 'message' => 'الصورة غير موجودة']);
            }
            
            $stmt->close();
            break;
            
        default:
            echo json_encode(['success' => false, 'message' => 'عملية غير صحيحة']);
            break;
    }
} else {
    echo json_encode(['success' => false, 'message' => 'طريقة الطلب غير صحيحة']);
}

$conn->close();
?>