class SchoolNavigationPolicy {
  static Uri? secureIdentityRedirect(Uri uri) {
    if (uri.scheme != 'http' ||
        uri.port != 80 ||
        uri.userInfo.isNotEmpty ||
        uri.host != 'idas.uestc.edu.cn' ||
        uri.path != '/authserver/login') {
      return null;
    }
    return Uri(
      scheme: 'https',
      host: uri.host,
      path: uri.path,
      query: uri.hasQuery ? uri.query : null,
      fragment: uri.hasFragment ? uri.fragment : null,
    );
  }

  static bool canNavigate(Uri uri, {required bool isMainFrame}) => isMainFrame
      ? isSchoolPage(uri)
      : isGraduatePage(uri) ||
            (uri.scheme == 'https' && uri.userInfo.isEmpty) ||
            (uri.scheme == 'about' && uri.path == 'blank');
  static bool _https(Uri uri) =>
      uri.scheme == 'https' && uri.port == 443 && uri.userInfo.isEmpty;
  static bool canInjectCredentials(Uri uri) =>
      _https(uri) &&
      uri.host == 'idas.uestc.edu.cn' &&
      uri.path == '/authserver/login';
  static bool isTimetable(Uri uri) =>
      _https(uri) &&
      uri.host == 'yjsjy.uestc.edu.cn' &&
      RegExp(
        r'^/pyxx/pygl/xskbcx/index/[1-9]\d*'
        r'$',
      ).hasMatch(uri.path);
  static bool isSchoolPage(Uri uri) =>
      (_https(uri) &&
          const {
            'idas.uestc.edu.cn',
            'yjsjy.uestc.edu.cn',
          }.contains(uri.host)) ||
      (uri.scheme == 'http' &&
          uri.port == 80 &&
          uri.userInfo.isEmpty &&
          uri.host == 'yjsjy.uestc.edu.cn' &&
          (uri.path == '/pyxx' || uri.path.startsWith('/pyxx/')));
  static bool isGraduatePage(Uri uri) =>
      isSchoolPage(uri) &&
      uri.host == 'yjsjy.uestc.edu.cn' &&
      (uri.path == '/pyxx' || uri.path.startsWith('/pyxx/'));
  static bool isExam(Uri uri) =>
      _https(uri) &&
      uri.host == 'yjsjy.uestc.edu.cn' &&
      uri.path == '/pyxx/pygl/kskcxx/index';
}