import 'package:flutter_test/flutter_test.dart';
import 'package:melo/services/navidrome_service.dart';

/// Tests für die Subsonic-Antwort-Auswertung. Kern des Bugfixes:
/// Navidrome liefert bei Fehlern (z. B. falsches Passwort) HTTP 200 mit
/// {"subsonic-response":{"status":"failed","error":{...}}}. Diese Antworten
/// dürfen NICHT stillschweigend als „leer" behandelt werden.
void main() {
  group('NavidromeService.parseSubsonic', () {
    test('status:failed wirft NavidromeException mit Server-Meldung', () {
      const body =
          '{"subsonic-response":{"status":"failed","version":"1.16.1",'
          '"error":{"code":40,"message":"Wrong username or password"}}}';
      expect(
        () => NavidromeService.parseSubsonic(body),
        throwsA(isA<NavidromeException>()
            .having((e) => e.message, 'message', 'Wrong username or password')
            .having((e) => e.code, 'code', 40)),
      );
    });

    test('status:ok liefert den subsonic-response-Block zurück', () {
      const body =
          '{"subsonic-response":{"status":"ok","version":"1.16.1",'
          '"albumList2":{"album":[]}}}';
      final resp = NavidromeService.parseSubsonic(body);
      expect(resp['status'], 'ok');
      expect(resp['albumList2'], isNotNull);
    });

    test('fehlender subsonic-response wirft NavidromeException', () {
      expect(() => NavidromeService.parseSubsonic('{"foo":1}'),
          throwsA(isA<NavidromeException>()));
    });
  });

  group('NavidromeService.parseAlben (ID3 / getAlbumList2)', () {
    test('liest albumList2.album korrekt', () {
      const body = '{"subsonic-response":{"status":"ok","albumList2":{"album":['
          '{"id":"a1","name":"Erstes Album","coverArt":"c1","songCount":9},'
          '{"id":"a2","title":"Zweites","songCount":3}'
          ']}}}';
      final resp = NavidromeService.parseSubsonic(body);
      final alben = NavidromeService.parseAlben(resp);
      expect(alben.length, 2);
      expect(alben[0].id, 'a1');
      expect(alben[0].name, 'Erstes Album');
      expect(alben[0].songCount, 9);
      expect(alben[1].name, 'Zweites');
    });

    test('leere albumList2 liefert leere Liste (kein Fehler)', () {
      final resp = NavidromeService.parseSubsonic(
          '{"subsonic-response":{"status":"ok","albumList2":{}}}');
      expect(NavidromeService.parseAlben(resp), isEmpty);
    });
  });
}