import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:go_router/go_router.dart';
import 'package:intaleq_maps/intaleq_maps.dart';
import '../features/auth/cubit/auth_cubit.dart';
import '../features/auth/cubit/auth_state.dart';
import '../features/splash/view/splash_screen.dart';
import '../features/onboarding/view/onboarding_screen.dart';
import '../features/auth/view/phone_screen.dart';
import '../features/auth/view/otp_screen.dart';
import '../features/auth/view/name_screen.dart';
import '../features/home/view/home_screen.dart';
import '../features/home/view/destination_screen.dart';
import '../features/home/view/route_preview_screen.dart';
import '../features/trip/view/trip_tracking_screen.dart';
import '../features/trip/view/trip_invoice_screen.dart';
import '../features/trip/view/rating_screen.dart';
import '../features/home/cubit/home_cubit.dart';
import '../features/home/cubit/destination_cubit.dart';
import '../features/home/cubit/quote_cubit.dart';
import '../features/home/cubit/saved_places_cubit.dart';
import '../features/home/data/models/place_model.dart';
import '../features/home/data/maps_repository.dart';
import '../features/home/data/tariff_repository.dart';
import '../core/storage/saved_places_store.dart';
import '../core/l10n/app_localizations.dart';
import 'di.dart';

GoRouter buildRouter(AuthCubit auth) {
  return GoRouter(
    initialLocation: '/splash',
    refreshListenable: _StreamRefresh(auth.stream),
    redirect: (context, state) {
      final status = auth.state.status;
      final loc = state.matchedLocation;
      final onSplash = loc == '/splash';
      final onOnboarding = loc == '/onboarding';
      final onAuthPages = loc == '/phone' || loc == '/otp' || loc == '/name';
      final onNamePage = loc == '/name';

      if (status == AuthStatus.authenticated) {
        final hasName = auth.state.user?.name != null &&
            auth.state.user!.name!.trim().isNotEmpty;
        if (!hasName && !onNamePage) return '/name';
        if (hasName && onNamePage) return '/home';
        if (onAuthPages || onSplash || onOnboarding) return hasName ? '/home' : '/name';
        return null;
      }
      
      if (onSplash || onOnboarding) return null;

      if (status == AuthStatus.codeSent && loc == '/phone') return '/otp';
      if (status != AuthStatus.authenticated && !onAuthPages) return '/phone';
      return null;
    },
    routes: [
      GoRoute(path: '/splash', builder: (_, __) => const SplashScreen()),
      GoRoute(path: '/onboarding', builder: (_, __) => const OnboardingScreen()),
      GoRoute(path: '/phone', builder: (_, __) => const PhoneScreen()),
      GoRoute(path: '/otp', builder: (_, __) => const OtpScreen()),
      GoRoute(path: '/name', builder: (_, __) => const NameScreen()),
      GoRoute(
        path: '/home',
        builder: (_, __) => MultiBlocProvider(
          providers: [
            BlocProvider(create: (_) => HomeCubit(getIt<MapsRepository>())),
            BlocProvider(create: (_) => SavedPlacesCubit(getIt<SavedPlacesStore>())),
          ],
          child: const HomeScreen(),
        ),
      ),
      GoRoute(
        path: '/destination',
        builder: (_, state) {
          final extra = state.extra as Map<String, dynamic>?;
          final currentLocation = extra?['currentLocation'] as LatLng?;
          return BlocProvider(
            create: (_) => DestinationCubit(getIt<MapsRepository>()),
            child: DestinationScreen(currentLocation: currentLocation),
          );
        },
      ),
      GoRoute(
        path: '/route-preview',
        builder: (_, state) {
          final extra = state.extra as Map<String, dynamic>?;
          final pickup = extra?['pickup'] as PlaceModel?;
          final destination = extra?['destination'] as PlaceModel?;
          if (pickup == null || destination == null) {
            return Builder(
              builder: (ctx) => Scaffold(
                body: Center(
                  child: Text(AppLocalizations.of(ctx)?.missingDataError ?? ''),
                ),
              ),
            );
          }
          return BlocProvider(
            create: (_) => QuoteCubit(getIt<TariffRepository>()),
            child: RoutePreviewScreen(pickup: pickup, destination: destination),
          );
        },
      ),
      GoRoute(path: '/trip-tracking', builder: (_, __) => const TripTrackingScreen()),
      GoRoute(path: '/trip-invoice', builder: (_, __) => const TripInvoiceScreen()),
      GoRoute(path: '/trip-rating', builder: (_, __) => const RatingScreen()),
    ],
  );
}

class _StreamRefresh extends ChangeNotifier {
  late final StreamSubscription<dynamic> _sub;
  _StreamRefresh(Stream<dynamic> stream) {
    notifyListeners();
    _sub = stream.asBroadcastStream().listen((_) => notifyListeners());
  }
  @override
  void dispose() {
    _sub.cancel();
    super.dispose();
  }
}