// Copyright (C) 2022 WYATT GROUP
// Please see the AUTHORS file for details.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

import 'package:bloc_test/bloc_test.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mocktail/mocktail.dart';
import 'package:wyatt_authentication_bloc/wyatt_authentication_bloc.dart';

class MockAuthenticationRepository extends Mock
    implements AuthenticationRepositoryInterface {}

class MockUser extends Mock implements UserInterface {}

void main() {
  group('AuthenticationCubit', () {
    final MockUser user = MockUser();
    late AuthenticationRepositoryInterface authenticationRepository;

    setUp(() {
      authenticationRepository = MockAuthenticationRepository();
      when(() => authenticationRepository.user).thenAnswer(
        (_) => const Stream.empty(),
      );
      when(
        () => authenticationRepository.currentUser,
      ).thenReturn(const UserFirebase.empty());
    });

    test('initial state is unknown', () {
      expect(
        AuthenticationCubit(authenticationRepository: authenticationRepository)
            .state,
        const AuthenticationState.unknown(),
      );
    });

    group('UserChanged', () {
      blocTest<AuthenticationCubit, AuthenticationState>(
        'emits authenticated when user is not empty',
        setUp: () {
          when(() => user.isNotEmpty).thenReturn(true);
          when(() => authenticationRepository.user).thenAnswer(
            (_) => Stream.value(user),
          );
        },
        build: () => AuthenticationCubit(
          authenticationRepository: authenticationRepository,
        )..init(),
        seed: () => const AuthenticationState.unknown(),
        expect: () => [AuthenticationState.authenticated(user, null)],
      );

      blocTest<AuthenticationCubit, AuthenticationState>(
        'emits unauthenticated when user is empty',
        setUp: () {
          when(() => authenticationRepository.user).thenAnswer(
            (_) => Stream.value(const UserFirebase.empty()),
          );
        },
        build: () => AuthenticationCubit(
          authenticationRepository: authenticationRepository,
        )..init(),
        seed: () => const AuthenticationState.unknown(),
        expect: () => [const AuthenticationState.unauthenticated()],
      );
    });

    group('LogoutRequested', () {
      blocTest<AuthenticationCubit, AuthenticationState>(
        'invokes signOut',
        setUp: () {
          when(
            () => authenticationRepository.signOut(),
          ).thenAnswer((_) async {});
        },
        build: () => AuthenticationCubit(
          authenticationRepository: authenticationRepository,
        ),
        act: (AuthenticationCubit cubit) => cubit.logOut(),
        verify: (_) {
          verify(() => authenticationRepository.signOut()).called(1);
        },
      );
    });
  });
}