import { isIPageInfoForEntity } from '@growi/core';
import { useTranslation } from 'next-i18next';


import { useIsEnabledStaleNotification } from '../../stores/context';
import { useSWRxCurrentPage, useSWRxPageInfo } from '../../stores/page';

export const PageStaleAlert = ():JSX.Element => {
  const { t } = useTranslation();
  const { data: isEnabledStaleNotification } = useIsEnabledStaleNotification();

  // Todo: determine if it should fetch or not like useSWRxPageInfo below after https://redmine.weseek.co.jp/issues/96788
  const { data: pageData } = useSWRxCurrentPage();
  const { data: pageInfo } = useSWRxPageInfo(isEnabledStaleNotification ? pageData?._id : null);

  const contentAge = isIPageInfoForEntity(pageInfo) ? pageInfo.contentAge : null;

  if (!isEnabledStaleNotification) {
    return <></>;
  }

  if (pageInfo == null || contentAge == null || contentAge === 0) {
    return <></>;
  }

  let alertClass;
  switch (contentAge) {
    case 1:
      alertClass = 'alert-info';
      break;
    case 2:
      alertClass = 'alert-warning';
      break;
    default:
      alertClass = 'alert-danger';
  }

  return (
    <div className={`alert ${alertClass}`}>
      <i className="icon-fw icon-hourglass"></i>
      <strong>{ t('page_page.notice.stale', { count: contentAge }) }</strong>
    </div>
  );
};