export function getMenuItems(moduleData, locale) {
  const menuMeta = moduleData.map(item => item.meta);
  const menuItems = {};
  menuMeta.sort(
    (a, b) => (a.order || 0) - (b.order || 0)
  ).forEach((meta) => {
    const category = (meta.category && meta.category[locale]) || meta.category || 'topLevel';
    if (!menuItems[category]) {
      menuItems[category] = {};
    }

    const type = meta.type || 'topLevel';
    if (!menuItems[category][type]) {
      menuItems[category][type] = [];
    }

    menuItems[category][type].push(meta);
  });
  return menuItems;
}

export function isZhCN(pathname) {
  return /-cn\/?$/.test(pathname);
}

export function getLocalizedPathname(path, zhCN) {
  const pathname = path.startsWith('/') ? path : `/${path}`;
  if (!zhCN) { // to enUS
    return /\/?index-cn/.test(pathname) ? '/' : pathname.replace('-cn', '');
  } else if (pathname === '/') {
    return '/index-cn';
  } else if (pathname.endsWith('/')) {
    return pathname.replace(/\/$/, '-cn/');
  }
  return `${pathname}-cn`;
}

export function ping(url, callback) {
  const img = new Image();
  let done;
  const finish = (status) => {
    if (!done) {
      done = true;
      img.src = '';
      callback(status);
    }
  };
  img.onload = () => finish('responded');
  img.onerror = () => finish('error');
  img.src = url;
  return setTimeout(() => finish('timeout'), 1500);
}
