add_action('wp_ajax_submit_book_rating', 'submit_book_rating');
add_action('wp_ajax_nopriv_submit_book_rating', 'submit_book_rating');

function submit_book_rating() {

    if ( ! isset($_POST['product_id'], $_POST['rating']) ) {
        wp_send_json_error();
    }

    $product_id = intval($_POST['product_id']);
    $rating     = intval($_POST['rating']);

    if ( $rating < 1 || $rating > 5 ) {
        wp_send_json_error();
    }

    // جلوگیری از رأی تکراری (IP + Cookie)
    $ip = $_SERVER['REMOTE_ADDR'];
    $cookie_key = 'book_rated_' . $product_id;

    if ( isset($_COOKIE[$cookie_key]) ) {
        wp_send_json_error(['message' => 'already_rated']);
    }

    // ساخت review واقعی ووکامرس
    $commentdata = array(
        'comment_post_ID' => $product_id,
        'comment_author'  => 'Guest',
        'comment_content' => '',
        'comment_type'    => 'review',
        'comment_approved'=> 1,
        'comment_author_IP' => $ip,
    );
    
    $existing = get_comments([
        'post_id' => $product_id,
        'author_ip' => $ip,
        'type' => 'review',
        'count' => true
    ]);
    
    if ($existing > 0) {
        wp_send_json_error(['message' => 'already_rated']);
    }

    $comment_id = wp_insert_comment($commentdata);

    if ( ! $comment_id ) {
        wp_send_json_error();
    }

    // ذخیره امتیاز
    add_comment_meta($comment_id, 'rating', $rating, true);

    // آپدیت متای ووکامرس
    wc_update_product_rating($product_id);

    // کوکی (۳۰ روز)
    setcookie($cookie_key, $rating, time() + MONTH_IN_SECONDS, '/');

    wp_send_json_success([
        'rating' => $rating,
        'average' => wc_get_rating_html( wc_get_product($product_id)->get_average_rating() )
    ]);
}