import 'package:get_it/get_it.dart';
import 'package:dio/dio.dart';
import 'package:shared_preferences/shared_preferences.dart';

import '../../core/network/api_client.dart';
import '../../features/auth/data/datasources/auth_local_datasource.dart';
import '../../features/auth/data/datasources/auth_local_datasource_impl.dart';
import '../../features/auth/data/datasources/auth_remote_datasource.dart';
import '../../features/auth/data/datasources/auth_remote_datasource_impl.dart';
import '../../features/auth/data/repositories/auth_repository_impl.dart';
import '../../features/auth/domain/repositories/auth_repository.dart';
import '../../features/auth/presentation/bloc/auth_bloc.dart';
import '../../core/database/database_service.dart';
import '../../core/network/signalr_service.dart';
import '../../features/chat/data/datasources/chat_local_datasource.dart';
import '../../features/chat/data/datasources/chat_local_datasource_impl.dart';
import '../../features/chat/data/datasources/chat_remote_datasource.dart';
import '../../features/chat/data/datasources/chat_remote_datasource_impl.dart';
import '../../features/chat/data/repositories/chat_repository_impl.dart';
import '../../features/chat/domain/repositories/chat_repository.dart';
import '../../features/chat/presentation/bloc/chat_bloc.dart';
import '../../features/settings/data/datasources/settings_local_datasource.dart';
import '../../features/settings/data/datasources/settings_remote_datasource.dart';
import '../../features/settings/data/repositories/settings_repository_impl.dart';
import '../../features/settings/domain/repositories/settings_repository.dart';
import '../../features/settings/presentation/bloc/settings_bloc.dart';

final sl = GetIt.instance;

Future<void> initDependencies() async {
  // Core - SharedPreferences
  final prefs = await SharedPreferences.getInstance();
  sl.registerLazySingleton<SharedPreferences>(() => prefs);

  // Core - Settings Local DataSource
  sl.registerLazySingleton<SettingsLocalDataSource>(
    () => SettingsLocalDataSourceImpl(sl()),
  );

  // Core - Dio (with dynamic base URL from settings)
  sl.registerLazySingleton<Dio>(() {
    final prefs = sl<SharedPreferences>();
    var apiUrl = prefs.getString('api_url') ?? 'https://api.messenger.app';
    
    // Нормализуем URL: убираем /api в конце если есть
    apiUrl = apiUrl.replaceAll(RegExp(r'/+$'), '');
    if (apiUrl.endsWith('/api')) {
      apiUrl = apiUrl.substring(0, apiUrl.length - 4).replaceAll(RegExp(r'/+$'), '');
    }
    
    final dio = Dio(BaseOptions(
      baseUrl: apiUrl,
      connectTimeout: const Duration(seconds: 30),
      receiveTimeout: const Duration(seconds: 30),
    ));

    dio.interceptors.add(InterceptorsWrapper(
      onRequest: (options, handler) {
        final token = prefs.getString('access_token');
        if (token != null) {
          options.headers['Authorization'] = 'Bearer $token';
        }
        return handler.next(options);
      },
    ));

    return dio;
  });

  // Core - API Client
  sl.registerLazySingleton<ApiClient>(() => ApiClient(sl()));

  // Core - Database & SignalR
  final dbService = DatabaseService();
  await dbService.init();
  sl.registerSingleton<DatabaseService>(dbService);
  sl.registerLazySingleton<SignalRService>(() => SignalRService(sl()));

  // Settings
  sl.registerLazySingleton<SettingsRemoteDataSource>(
    () => SettingsRemoteDataSourceImpl(sl()),
  );
  sl.registerLazySingleton<SettingsRepository>(
    () => SettingsRepositoryImpl(sl(), sl()),
  );
  sl.registerFactory<SettingsBloc>(() => SettingsBloc(sl()));

  // Auth
  sl.registerLazySingleton<AuthLocalDataSource>(
    () => AuthLocalDataSourceImpl(sl()),
  );
  sl.registerLazySingleton<AuthRemoteDataSource>(
    () => AuthRemoteDataSourceImpl(sl()),
  );
  sl.registerLazySingleton<AuthRepository>(
    () => AuthRepositoryImpl(
      remoteDataSource: sl(),
      localDataSource: sl(),
    ),
  );
  sl.registerFactory<AuthBloc>(() => AuthBloc(authRepository: sl()));

  // Chat
  sl.registerLazySingleton<ChatLocalDataSource>(
    () => ChatLocalDataSourceImpl(sl<DatabaseService>().isar),
  );
  sl.registerLazySingleton<ChatRemoteDataSource>(
    () => ChatRemoteDataSourceImpl(sl()),
  );
  sl.registerLazySingleton<ChatRepository>(
    () => ChatRepositoryImpl(
      remoteDataSource: sl(),
      localDataSource: sl(),
      signalRService: sl(),
    ),
  );
  sl.registerFactory<ChatBloc>(() => ChatBloc(chatRepository: sl()));
}