import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:go_router/go_router.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'core/router/app_router.dart';
import 'core/theme/app_theme.dart';
import 'features/auth/data/repositories/auth_repository_impl.dart';
import 'features/auth/domain/usecases/auth_usecases.dart';
import 'features/auth/presentation/bloc/auth_bloc.dart';
import 'features/auth/presentation/bloc/auth_event.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();

  // Inicializa SharedPreferences para persistencia de sesión
  final prefs = await SharedPreferences.getInstance();

  // Inyección de dependencias manual (Clean Architecture sin service locator)
  // PRODUCCIÓN: Reemplazar con get_it o injectable para mayor escalabilidad
  final authRepository = AuthRepositoryImpl(prefs);

  final loginUseCase = LoginUseCase(authRepository);
  final logoutUseCase = LogoutUseCase(authRepository);
  final getStoredSessionUseCase = GetStoredSessionUseCase(authRepository);

  final authBloc = AuthBloc(
    loginUseCase: loginUseCase,
    logoutUseCase: logoutUseCase,
    getStoredSessionUseCase: getStoredSessionUseCase,
  );

  // Verifica sesión almacenada al iniciar
  authBloc.add(const AuthSessionCheckRequested());

  runApp(WasteNotifyApp(authBloc: authBloc));
}

/// Punto de entrada de la aplicación WasteNotify.
///
/// Arquitectura: Clean Architecture + BLoC + go_router
/// Privacidad: Sin rastreo GPS, sin mapas en tiempo real
/// Seguridad: Sesiones JWT simuladas (fase MVP)
class WasteNotifyApp extends StatelessWidget {
  final AuthBloc authBloc;

  const WasteNotifyApp({super.key, required this.authBloc});

  @override
  Widget build(BuildContext context) {
    return BlocProvider.value(
      value: authBloc,
      child: _AppView(authBloc: authBloc),
    );
  }
}

class _AppView extends StatefulWidget {
  final AuthBloc authBloc;

  const _AppView({required this.authBloc});

  @override
  State<_AppView> createState() => _AppViewState();
}

class _AppViewState extends State<_AppView> {
  late final GoRouter _router;

  @override
  void initState() {
    super.initState();
    _router = createRouter(widget.authBloc);
  }

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      title: 'WasteNotify',
      debugShowCheckedModeBanner: false,
      theme: AppTheme.light,
      routerConfig: _router,
    );
  }
}