import 'dart:async';

import 'package:appflowy/user/application/auth/appflowy_auth_service.dart';
import 'package:appflowy/user/application/auth/auth_service.dart';
import 'package:appflowy/user/application/user_service.dart';
import 'package:appflowy_backend/dispatch/dispatch.dart';
import 'package:appflowy_backend/log.dart';
import 'package:appflowy_backend/protobuf/flowy-error/errors.pb.dart';
import 'package:appflowy_backend/protobuf/flowy-user/protobuf.dart';
import 'package:dartz/dartz.dart';
import 'package:nanoid/nanoid.dart';
import 'package:supabase_flutter/supabase_flutter.dart';

import 'auth_error.dart';

/// Only used for testing.
class MockAuthService implements AuthService {
  MockAuthService();

  SupabaseClient get _client => Supabase.instance.client;
  GoTrueClient get _auth => _client.auth;

  final AppFlowyAuthService _appFlowyAuthService = AppFlowyAuthService();

  @override
  Future<Either<FlowyError, UserProfilePB>> signUp({
    required String name,
    required String email,
    required String password,
    AuthTypePB authType = AuthTypePB.Supabase,
    Map<String, String> params = const {},
  }) async {
    throw UnimplementedError();
  }

  @override
  Future<Either<FlowyError, UserProfilePB>> signIn({
    required String email,
    required String password,
    AuthTypePB authType = AuthTypePB.Supabase,
    Map<String, String> params = const {},
  }) async {
    throw UnimplementedError();
  }

  @override
  Future<Either<FlowyError, UserProfilePB>> signUpWithOAuth({
    required String platform,
    AuthTypePB authType = AuthTypePB.Supabase,
    Map<String, String> params = const {},
  }) async {
    try {
      final response = await _auth.signUp(
        email: "${nanoid(10)}@appflowy.io",
        password: "AppFlowyTest123!",
      );

      final uuid = response.user!.id;
      final email = response.user!.email!;

      final payload = ThirdPartyAuthPB(
        authType: AuthTypePB.Supabase,
        map: {
          AuthServiceMapKeys.uuid: uuid,
          AuthServiceMapKeys.email: email,
          AuthServiceMapKeys.deviceId: 'MockDeviceId'
        },
      );
      return UserEventThirdPartyAuth(payload)
          .send()
          .then((value) => value.swap());
    } on AuthException catch (e) {
      Log.error(e);
      return Left(AuthError.supabaseSignInError);
    }
  }

  @override
  Future<void> signOut({
    AuthTypePB authType = AuthTypePB.Supabase,
  }) async {
    await _auth.signOut();
    await _appFlowyAuthService.signOut(
      authType: authType,
    );
  }

  @override
  Future<Either<FlowyError, UserProfilePB>> signUpAsGuest({
    AuthTypePB authType = AuthTypePB.Supabase,
    Map<String, String> params = const {},
  }) async {
    // supabase don't support guest login.
    // so, just forward to our backend.
    return _appFlowyAuthService.signUpAsGuest();
  }

  @override
  Future<Either<FlowyError, UserProfilePB>> signInWithMagicLink({
    required String email,
    Map<String, String> params = const {},
  }) async {
    throw UnimplementedError();
  }

  @override
  Future<Either<FlowyError, UserProfilePB>> getUser() async {
    return UserBackendService.getCurrentUserProfile();
  }
}