enum Environment {
  production,
}

class AppConfig {
  static const Environment currentEnvironment = Environment.production;
  static const String appName = '本地打包';
  static const String appLogo = '';

  static final Map<Environment, List<String>> _environmentHosts = {
    Environment.production: [
      'h5-im.imharry.work',
    ],
  };

  static List<String> get environmentHosts {
    return _environmentHosts[currentEnvironment] ?? const [];
  }

  static String homeUrl({String? appName, String? appLogo}) {
    final host = environmentHosts.isNotEmpty
        ? environmentHosts.first
        : 'h5-im.imharry.work';
    return _withShellBranding(
      _normalizeHomeUrl(host),
      appName: appName,
      appLogo: appLogo,
    );
  }

  static String _normalizeHomeUrl(String host) {
    final value = host.trim();
    if (value.startsWith('http://') || value.startsWith('https://')) {
      return value.endsWith('/') ? value : '$value/';
    }
    return 'https://$value/';
  }

  static String _withShellBranding(
    String url, {
    String? appName,
    String? appLogo,
  }) {
    final uri = Uri.parse(url);
    final queryParameters = Map<String, String>.from(uri.queryParameters)
      ..['flutter_shell'] = '1';

    final trimmedName = (appName ?? AppConfig.appName).trim();
    if (trimmedName.isNotEmpty) {
      queryParameters['shell_app_name'] = trimmedName;
    }

    final fragmentParameters = Map<String, String>.from(
      Uri.splitQueryString(uri.fragment),
    );
    final trimmedLogo = (appLogo ?? AppConfig.appLogo).trim();
    if (trimmedLogo.isNotEmpty) {
      fragmentParameters['shell_app_logo'] = trimmedLogo;
    }

    return uri
        .replace(
          queryParameters: queryParameters,
          fragment: fragmentParameters.isEmpty
              ? null
              : Uri(queryParameters: fragmentParameters).query,
        )
        .toString();
  }
}