import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'core/l10n/app_localizations.dart';
import 'core/di.dart';
import 'core/router.dart';
import 'core/design/theme.dart';
import 'features/auth/cubit/auth_cubit.dart';
import 'features/auth/cubit/auth_state.dart';
import 'features/auth/data/auth_repository.dart';
import 'features/settings/cubit/settings_cubit.dart';
import 'features/trip/bloc/trip_bloc.dart';
import 'features/trip/bloc/trip_event.dart';
import 'features/trip/data/trip_socket_service.dart';
import 'features/trip/data/fcm_service.dart';

class TripzApp extends StatelessWidget {
  const TripzApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MultiBlocProvider(
      providers: [
        BlocProvider(create: (_) => SettingsCubit()),
        BlocProvider(
          create: (_) => AuthCubit(getIt<AuthRepository>())..checkAuth(),
        ),
        BlocProvider<TripBloc>(
          create: (_) => TripBloc(
            tripRepo: getIt(),
            socket: getIt<TripSocketService>(),
          )..add(const TripCheckActive()),
        ),
      ],
      child: _AppListener(
        child: Builder(
          builder: (context) {
            final settings = context.watch<SettingsCubit>();
            final auth = context.read<AuthCubit>();
            final router = buildRouter(auth);

            return MaterialApp.router(
              title: 'Tripz',
              debugShowCheckedModeBanner: false,
              theme: buildTheme(
                brightness: Brightness.light,
                locale: settings.state.locale,
              ),
              darkTheme: buildTheme(
                brightness: Brightness.dark,
                locale: settings.state.locale,
              ),
              themeMode: settings.state.themeMode,
              locale: settings.state.locale,
              supportedLocales: AppLocalizations.supportedLocales,
              localizationsDelegates: AppLocalizations.localizationsDelegates,
              routerConfig: router,
            );
          },
        ),
      ),
    );
  }
}

/// يستمع لتغيير حالة المصادقة ويُهيّئ FCM بعد تسجيل الدخول.
class _AppListener extends StatefulWidget {
  final Widget child;
  const _AppListener({required this.child});

  @override
  State<_AppListener> createState() => _AppListenerState();
}

class _AppListenerState extends State<_AppListener> {
  @override
  void initState() {
    super.initState();
    final auth = context.read<AuthCubit>();
    auth.stream.listen((state) {
      if (state.status == AuthStatus.authenticated) {
        getIt<FcmService>().init();
      }
    });
  }

  @override
  Widget build(BuildContext context) => widget.child;
}