import 'package:dio/dio.dart';

import 'emergency_notice.dart';

/// Loads the emergency notice from a foreign URL over a standalone [Dio]
/// instance — no MarianumConnect interceptors, base URL or auth. That keeps the
/// fallback fully independent of the backend it is meant to survive.
///
/// Fail-safe by contract: if the server is unreachable, times out, answers with
/// a non-2xx status or delivers unparsable content, [fetch] returns `null` and
/// nothing is shown. It never throws.
class EmergencyNoticeClient {
  const EmergencyNoticeClient();

  Future<EmergencyNotice?> fetch(String url) async {
    try {
      final dio = Dio(
        BaseOptions(
          connectTimeout: const Duration(seconds: 5),
          receiveTimeout: const Duration(seconds: 5),
          sendTimeout: const Duration(seconds: 5),
          responseType: ResponseType.plain,
        ),
      );
      final response = await dio.get<String>(url);
      final raw = response.data;
      if (raw == null || raw.isEmpty) return null;
      return EmergencyNotice.parse(raw);
    } catch (_) {
      // Server down / timeout / bad status / malformed body: show nothing.
      return null;
    }
  }
}