import 'package:html/parser.dart';
import 'package:http/http.dart';
import 'package:obtainium/custom_errors.dart';
import 'package:obtainium/providers/source_provider.dart';

class Mullvad extends AppSource {
  Mullvad() {
    host = 'mullvad.net';
  }

  @override
  String standardizeURL(String url) {
    RegExp standardUrlRegEx = RegExp('^https?://$host');
    RegExpMatch? match = standardUrlRegEx.firstMatch(url.toLowerCase());
    if (match == null) {
      throw InvalidURLError(name);
    }
    return url.substring(0, match.end);
  }

  @override
  String? changeLogPageFromStandardUrl(String standardUrl) =>
      'https://github.com/mullvad/mullvadvpn-app/blob/master/CHANGELOG.md';

  @override
  Future<APKDetails> getLatestAPKDetails(
    String standardUrl,
    Map<String, String> additionalSettings,
  ) async {
    Response res = await get(Uri.parse('$standardUrl/en/download/android'));
    if (res.statusCode == 200) {
      var version = parse(res.body)
          .querySelector('p.subtitle.is-6')
          ?.querySelector('a')
          ?.attributes['href']
          ?.split('/')
          .last;
      if (version == null) {
        throw NoVersionError();
      }
      return APKDetails(
          version,
          ['https://mullvad.net/download/app/apk/latest'],
          AppNames(name, 'Mullvad-VPN'));
    } else {
      throw NoReleasesError();
    }
  }
}