import 'package:eatvio_app/core/firebase_api.dart';
import 'package:eatvio_app/core/prefs.dart';
import 'package:eatvio_app/core/prefs_keys.dart';
import 'package:eatvio_app/features/auth/models/token_model.dart';
import 'package:eatvio_app/features/auth/presentation/bloc/auth_cubit/auth_cubit.dart';
import 'package:eatvio_app/features/auth/presentation/bloc/auth_cubit/auth_state.dart';
import 'package:eatvio_app/features/profile/repositories/profile_repository.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mockito/annotations.dart';
import 'package:mockito/mockito.dart';
import 'package:shared_preferences/shared_preferences.dart';

import '../../../../fixtures/doubles/auth_doubles.dart';
import '../../../../fixtures/doubles/profile_doubles.dart';
import '../../../../fixtures/fixture_reader.dart';
import 'auth_cubit_test.mocks.dart';

@GenerateNiceMocks([MockSpec<Prefs>(), MockSpec<FirebaseApi>(), MockSpec<ProfileRepository>()])
void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  group('AuthCubit', () {
    AuthCubit? authCubit;
    late FixtureAuthRepository authRepository;
    late FixtureProfileRepository profileRepository;
    late MockPrefs mockPrefs;
    late MockFirebaseApi mockFirebaseApi;
    late Map<String, dynamic> credentialsFixture;

    late TokenModel tokenFixture;

    setUp(() async {
      tokenFixture = TokenModel.fromJson(FixtureReader.readAsMap('auth/token_response.json'));
      credentialsFixture = FixtureReader.readAsMap('auth/login_credentials.json');
      authRepository = FixtureAuthRepository(tokenFixture: tokenFixture);
      profileRepository = FixtureProfileRepository();
      mockPrefs = MockPrefs();
      mockFirebaseApi = MockFirebaseApi();
      SharedPreferences.setMockInitialValues({});

      // Mock Fluttertoast plugin
      TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(const MethodChannel('PonnamKarthik/fluttertoast'), (
        MethodCall methodCall,
      ) async {
        return null;
      });
    });

    tearDown(() async {
      if (authCubit != null && !authCubit!.isClosed) {
        await Future.delayed(const Duration(milliseconds: 100));
        authCubit!.close();
        authCubit = null;
      }

      // Clear mock handlers
      TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(const MethodChannel('PonnamKarthik/fluttertoast'), null);
    });

    test('начальное состояние - AuthState', () {
      authCubit = AuthCubit(authRepository: authRepository, prefs: mockPrefs, profileRepository: profileRepository, firebaseApi: mockFirebaseApi);
      expect(authCubit!.state, const AuthState());
    });

    test('getTokenByCredentials - успешная авторизация', () async {
      authCubit = AuthCubit(authRepository: authRepository, prefs: mockPrefs, profileRepository: profileRepository, firebaseApi: mockFirebaseApi);

      final result = await authCubit!.getTokenByCredentials(credentialsFixture['email'] as String, credentialsFixture['password'] as String);

      expect(result, true);
      await Future.delayed(const Duration(milliseconds: 100));
      expect(authCubit!.state, isA<AuthStateLoaded>());
      final loadedState = authCubit!.state as AuthStateLoaded;
      expect(loadedState.token, tokenFixture.token);
      expect(authRepository.credentialPayloads.single, credentialsFixture.map((key, value) => MapEntry(key, value.toString())));
    });

    test('getTokenByCredentials - переход в состояние loading', () async {
      authCubit = AuthCubit(authRepository: authRepository, prefs: mockPrefs, profileRepository: profileRepository, firebaseApi: mockFirebaseApi);
      authRepository.responseDelay = const Duration(milliseconds: 50);

      final future = authCubit!.getTokenByCredentials(credentialsFixture['email'] as String, credentialsFixture['password'] as String);
      await Future.delayed(const Duration(milliseconds: 10));

      expect(authCubit!.state, isA<AuthStateLoading>());
      await future;
    });

    test('getTokenByCredentials - обработка ошибки авторизации', () async {
      authCubit = AuthCubit(authRepository: authRepository, prefs: mockPrefs, profileRepository: profileRepository, firebaseApi: mockFirebaseApi);
      authRepository.error = Exception('Неверный адрес электронной почты или пароль');

      final result = await authCubit!.getTokenByCredentials('wrong@example.com', 'wrongpassword');

      expect(result, false);
      await Future.delayed(const Duration(milliseconds: 100));
      expect(authCubit!.state, isA<AuthStateError>());
      final errorState = authCubit!.state as AuthStateError;
      expect(errorState.errorMessage, contains('Exception'));
      expect(authRepository.credentialPayloads.single, {'email': 'wrong@example.com', 'password': 'wrongpassword'});
    });

    test('getTokenByCredentials - обработка различных типов ошибок', () async {
      authCubit = AuthCubit(authRepository: authRepository, prefs: mockPrefs, profileRepository: profileRepository, firebaseApi: mockFirebaseApi);
      authRepository.error = const FormatException('Invalid credentials format');

      final result = await authCubit!.getTokenByCredentials('invalid', 'pass');

      expect(result, false);
      await Future.delayed(const Duration(milliseconds: 100));
      expect(authCubit!.state, isA<AuthStateError>());
      final errorState = authCubit!.state as AuthStateError;
      expect(errorState.errorMessage, contains('FormatException'));
    });

    test('getTokenByCredentials - проверка вызова с правильными параметрами', () async {
      authCubit = AuthCubit(authRepository: authRepository, prefs: mockPrefs, profileRepository: profileRepository, firebaseApi: mockFirebaseApi);

      await authCubit!.getTokenByCredentials('user@test.com', 'securePassword123');

      expect(authRepository.credentialPayloads.single, {'email': 'user@test.com', 'password': 'securePassword123'});
      expect(authRepository.credentialPayloads.where((call) => call['email'] == 'other@test.com'), isEmpty);
    });

    test('getTokenByCredentials - множественные вызовы', () async {
      authCubit = AuthCubit(authRepository: authRepository, prefs: mockPrefs, profileRepository: profileRepository, firebaseApi: mockFirebaseApi);

      await authCubit!.getTokenByCredentials('first@test.com', 'password1');
      await Future.delayed(const Duration(milliseconds: 100));
      await authCubit!.getTokenByCredentials('second@test.com', 'password2');

      expect(authRepository.credentialPayloads.length, 2);
      expect(authRepository.credentialPayloads, [
        {'email': 'first@test.com', 'password': 'password1'},
        {'email': 'second@test.com', 'password': 'password2'},
      ]);
    });

    test('registerAnonymousPushToken - регистрирует токен если не был отправлен', () async {
      authCubit = AuthCubit(authRepository: authRepository, prefs: mockPrefs, profileRepository: profileRepository, firebaseApi: mockFirebaseApi);
      when(mockPrefs.getBool(PrefsKeys.hasAnonymousTokenBeenSent)).thenReturn(false);
      when(mockFirebaseApi.registerAnonymousPushToken()).thenAnswer((_) async => {});
      when(mockPrefs.setBool(PrefsKeys.hasAnonymousTokenBeenSent, true)).thenAnswer((_) async => {});

      await authCubit!.registerAnonymousPushToken();

      verify(mockFirebaseApi.registerAnonymousPushToken()).called(1);
      verify(mockPrefs.setBool(PrefsKeys.hasAnonymousTokenBeenSent, true)).called(1);
    });

    test('registerAnonymousPushToken - не регистрирует токен если уже был отправлен', () async {
      authCubit = AuthCubit(authRepository: authRepository, prefs: mockPrefs, profileRepository: profileRepository, firebaseApi: mockFirebaseApi);
      when(mockPrefs.getBool(PrefsKeys.hasAnonymousTokenBeenSent)).thenReturn(true);

      await authCubit!.registerAnonymousPushToken();

      verifyNever(mockFirebaseApi.registerAnonymousPushToken());
    });

    test('registerPushToken - регистрирует push токен', () async {
      authCubit = AuthCubit(authRepository: authRepository, prefs: mockPrefs, profileRepository: profileRepository, firebaseApi: mockFirebaseApi);
      when(mockFirebaseApi.registerPushToken()).thenAnswer((_) async => {});

      await authCubit!.registerPushToken();

      verify(mockFirebaseApi.registerPushToken()).called(1);
    });

    test('registerAnonymousPushToken - обрабатывает null значение hasAnonymousTokenBeenSent', () async {
      authCubit = AuthCubit(authRepository: authRepository, prefs: mockPrefs, profileRepository: profileRepository, firebaseApi: mockFirebaseApi);
      when(mockPrefs.getBool(PrefsKeys.hasAnonymousTokenBeenSent)).thenReturn(null);
      when(mockFirebaseApi.registerAnonymousPushToken()).thenAnswer((_) async => {});
      when(mockPrefs.setBool(PrefsKeys.hasAnonymousTokenBeenSent, true)).thenAnswer((_) async => {});

      await authCubit!.registerAnonymousPushToken();

      verify(mockFirebaseApi.registerAnonymousPushToken()).called(1);
      verify(mockPrefs.setBool(PrefsKeys.hasAnonymousTokenBeenSent, true)).called(1);
    });
  });
}