import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:http/http.dart' as http;
import 'package:http/testing.dart';
import 'package:melo/downloads/downloads_screen.dart';
import 'package:melo/services/baka_auth.dart';
import 'package:melo/services/yt_download_service.dart';
import 'package:provider/provider.dart';
import 'package:shared_preferences/shared_preferences.dart';

class _MemorySpeicher implements TokenSpeicher {
  final Map<String, String> werte = {};
  @override
  Future<String?> lesen(String key) async => werte[key];
  @override
  Future<void> schreiben(String key, String wert) async => werte[key] = wert;
  @override
  Future<void> loeschen(String key) async => werte.remove(key);
}

Widget _wrap(BakaAuth auth) {
  return MultiProvider(
    providers: [
      ChangeNotifierProvider<BakaAuth>.value(value: auth),
      ChangeNotifierProvider<YtDownloadService>(
        create: (_) => YtDownloadService(
          auth: auth,
          client: MockClient((_) async => http.Response('', 500)),
        ),
      ),
    ],
    child: const MaterialApp(home: Scaffold(body: DownloadsScreen())),
  );
}

void main() {
  setUp(() => SharedPreferences.setMockInitialValues({}));

  testWidgets('Online-Tab hat die Unterreiter YouTube und Server',
      (tester) async {
    final auth =
        BakaAuth(client: MockClient((_) async => http.Response('', 500)),
            speicher: _MemorySpeicher());

    await tester.pumpWidget(_wrap(auth));
    await tester.pump();

    expect(find.text('YouTube'), findsOneWidget);
    expect(find.text('Server'), findsOneWidget);
  });

  testWidgets('Ohne Anmeldung fordert der YouTube-Bereich zum Anmelden auf',
      (tester) async {
    final auth =
        BakaAuth(client: MockClient((_) async => http.Response('', 500)),
            speicher: _MemorySpeicher());

    await tester.pumpWidget(_wrap(auth));
    await tester.pump();

    expect(find.text('Beim Baka-Konto anmelden'), findsOneWidget);
    expect(find.byType(TextField), findsNothing);
  });

  testWidgets('Angemeldet zeigt der YouTube-Bereich das Adressfeld',
      (tester) async {
    final auth = BakaAuth(
      client: MockClient(
          (_) async => http.Response(jsonEncode({'token': 'jwt'}), 200)),
      speicher: _MemorySpeicher(),
    );
    await auth.anmelden('Baka', 'geheim');

    await tester.pumpWidget(_wrap(auth));
    await tester.pump();

    expect(find.text('Angemeldet als Baka'), findsOneWidget);
    expect(find.byType(TextField), findsOneWidget);
    expect(find.text('Herunterladen'), findsOneWidget);
  });
}