import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:go_router/go_router.dart';
import 'core/api/api_client.dart';
import 'core/auth/auth_bloc.dart';
import 'core/chat/chat_bloc.dart';
import 'core/chat/session_closure_bloc.dart';
import 'core/pairing/pairing_bloc.dart';
import 'firebase_options.dart';
import 'router.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform);

  // Request notification permission
  final messaging = FirebaseMessaging.instance;
  await messaging.requestPermission();

  runApp(const App());
}

class App extends StatefulWidget {
  const App({super.key});

  @override
  State<App> createState() => _AppState();
}

class _AppState extends State<App> {
  final _apiClient = ApiClient();
  late final AuthBloc _authBloc;
  late final GoRouter _router;

  @override
  void initState() {
    super.initState();
    _authBloc = AuthBloc(apiClient: _apiClient)..add(AppStarted());
    _router = buildRouter(_authBloc);
    _registerFcmToken();
  }

  Future<void> _registerFcmToken() async {
    // Listen for auth state, then register token
    _authBloc.stream.listen((state) async {
      if (state is AuthAuthenticated || state is AuthAnonymous) {
        try {
          final token = await FirebaseMessaging.instance.getToken();
          if (token != null) {
            await _apiClient.post('/api/shared/device-token', data: {'token': token});
          }
        } catch (_) {}
      }
    });
  }

  @override
  void dispose() {
    _authBloc.close();
    _router.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MultiBlocProvider(
      providers: [
        BlocProvider.value(value: _authBloc),
        BlocProvider(create: (_) => PairingBloc(apiClient: _apiClient)),
        BlocProvider(create: (_) => ChatBloc(apiClient: _apiClient)),
        BlocProvider(create: (_) => SessionClosureBloc(apiClient: _apiClient)),
        RepositoryProvider.value(value: _apiClient),
      ],
      child: MaterialApp.router(
        title: 'Halo Bestie',
        routerConfig: _router,
      ),
    );
  }
}