import 'package:flutter_test/flutter_test.dart';
import 'package:meeyao_qianwen/features/auth/data/models/auth_user.dart';
import 'package:meeyao_qianwen/features/auth/data/repositories/auth_repository.dart';
import 'package:meeyao_qianwen/features/auth/presentation/bloc/auth_bloc.dart';
import 'package:meeyao_qianwen/features/auth/presentation/bloc/auth_state.dart';

class _FakeAuthRepository implements AuthRepository {
  _FakeAuthRepository({this.recoveredUser, this.throwOnLogout = false});

  AuthUser? recoveredUser;
  bool clearCalled = false;
  bool logoutCalled = false;
  bool throwOnLogout;

  @override
  Future<void> clearLocalSession() async {
    clearCalled = true;
  }

  @override
  Future<AuthUser> loginWithEmailOtp({
    required String email,
    required String otp,
  }) async {
    return AuthUser(id: 'u1', email: email);
  }

  @override
  Future<void> logout() async {
    logoutCalled = true;
    if (throwOnLogout) {
      throw Exception('logout failed');
    }
  }

  @override
  Future<AuthUser?> recoverSession() async {
    return recoveredUser;
  }

  @override
  Future<void> sendOtp(String email) async {}
}

void main() {
  test('start should become authenticated when recover success', () async {
    final repo = _FakeAuthRepository(
      recoveredUser: const AuthUser(id: 'u1', email: 'a@b.com'),
    );
    final bloc = AuthBloc(repository: repo);

    await bloc.start();

    expect(bloc.state.status, AuthStatus.authenticated);
    expect(bloc.state.user?.email, 'a@b.com');
  });

  test('handleUnauthorized401 should clear local session and unauth', () async {
    final repo = _FakeAuthRepository(
      recoveredUser: const AuthUser(id: 'u1', email: 'a@b.com'),
    );
    final bloc = AuthBloc(repository: repo);

    await bloc.start();
    await bloc.handleUnauthorized401();

    expect(repo.clearCalled, isTrue);
    expect(bloc.state.status, AuthStatus.unauthenticated);
  });

  test(
    'logout should set unauthenticated even when repository throws',
    () async {
      final repo = _FakeAuthRepository(
        recoveredUser: const AuthUser(id: 'u1', email: 'a@b.com'),
        throwOnLogout: true,
      );
      final bloc = AuthBloc(repository: repo);

      await bloc.start();

      await expectLater(bloc.logout(), throwsA(isA<Exception>()));
      expect(repo.logoutCalled, isTrue);
      expect(bloc.state.status, AuthStatus.unauthenticated);
    },
  );
}