import 'dart:async';
import 'package:flutter/widgets.dart';
import 'package:go_router/go_router.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import '../features/auth/cubit/auth_cubit.dart';
import '../features/auth/cubit/auth_state.dart';
import '../features/auth/view/phone_screen.dart';
import '../features/auth/view/otp_screen.dart';
import '../features/home/view/home_screen.dart';
import '../features/trip/bloc/driver_trip_bloc.dart';
import '../features/trip/view/driver_trip_screen.dart';
import '../features/trip/view/driver_chat_screen.dart';
import '../core/di.dart';

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

      if (status == AuthStatus.authenticated) {
        return onAuthPages ? '/home' : null;
      }
      if (status == AuthStatus.codeSent && loc == '/phone') return '/otp';
      if (status != AuthStatus.authenticated && !onAuthPages) return '/phone';
      return null;
    },
    routes: [
      GoRoute(path: '/phone', builder: (_, __) => const PhoneScreen()),
      GoRoute(path: '/otp', builder: (_, __) => const OtpScreen()),
      GoRoute(path: '/home', builder: (_, __) => const HomeScreen()),
      GoRoute(
        path: '/trip',
        builder: (_, __) => BlocProvider.value(
          value: getIt<DriverTripBloc>(),
          child: const DriverTripScreen(),
        ),
      ),
      GoRoute(
        path: '/chat/:tripId',
        builder: (context, state) {
          final tripId = state.pathParameters['tripId']!;
          return DriverChatScreen(tripId: tripId);
        },
      ),
    ],
  );
}

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();
  }
}