import 'package:flutter/widgets.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:go_router/go_router.dart';
import 'app_route_observer.dart';
import '../di/injection.dart';
import '../../../features/auth/presentation/bloc/auth_bloc.dart';
import '../../../features/auth/presentation/bloc/auth_state.dart';
import '../../../features/chat/presentation/bloc/chat_bloc.dart';
import 'app_routes.dart';
import 'go_router_refresh_stream.dart';
import '../../../features/auth/presentation/screens/auth_boot_screen.dart';
import '../../../features/auth/presentation/screens/login_screen.dart';
import '../../../features/home/presentation/screens/home_screen.dart';
import '../../../features/messages/presentation/screens/message_invite_list_screen.dart';
import '../../../features/contacts/presentation/screens/contacts_screen.dart';
import '../../../features/contacts/presentation/screens/contact_detail_screen.dart';
import '../../../features/contacts/data/apis/users_api.dart';
import '../../../features/calendar/presentation/screens/calendar_dayweek_screen.dart';
import '../../../features/calendar/presentation/screens/calendar_month_screen.dart';
import '../../../features/calendar/presentation/screens/calendar_event_detail_screen.dart';
import '../../../features/calendar/presentation/screens/calendar_event_create_screen.dart';
import '../../../features/calendar/presentation/screens/calendar_event_edit_screen.dart';
import '../../../features/calendar/presentation/screens/calendar_event_share_screen.dart';
import '../../../features/calendar/presentation/screens/calendar_reminder_alarm_screen.dart';
import '../../../features/calendar/presentation/calendar_time_utils.dart';
import '../../../features/todo/presentation/screens/todo_quadrants_screen.dart';
import '../../../features/todo/presentation/screens/todo_detail_screen.dart';
import '../../../features/todo/presentation/screens/todo_edit_screen.dart';
import '../../../features/settings/presentation/screens/settings_screen.dart';
import '../../../features/settings/presentation/screens/features_screen.dart';
import '../../../features/settings/presentation/screens/job_detail_screen.dart';
import '../../../features/settings/presentation/screens/memory_screen.dart';
import '../../../features/settings/presentation/screens/user_memory_view_screen.dart';
import '../../../features/settings/presentation/screens/work_memory_view_screen.dart';
import '../../../features/settings/presentation/screens/user_memory_detail_screen.dart';
import '../../../features/settings/presentation/screens/work_memory_detail_screen.dart';
import '../../../features/settings/presentation/screens/edit_profile_screen.dart';
import '../services/app_prewarm_orchestrator.dart';

final _homeSecondLevelRoutes = [
  AppRoutes.shellCalendarBranch,
  AppRoutes.calendarMonth,
  AppRoutes.shellTodoBranch,
  AppRoutes.settingsMain,
];

final _protectedRoutes = [
  ..._homeSecondLevelRoutes,
  AppRoutes.contactsList,
  '/contacts/',
  '/calendar/events',
  '/calendar/reminders',
  AppRoutes.settingsFeatures,
  AppRoutes.settingsMemory,
  AppRoutes.settingsMemoryUser,
  AppRoutes.settingsMemoryWork,
  AppRoutes.settingsMemoryUserEdit,
  AppRoutes.settingsMemoryWorkEdit,
  AppRoutes.settingsEditProfile,
  AppRoutes.messageInviteList,
];

String? resolveAuthRedirect({
  required AuthState authState,
  required String matchedLocation,
  AppPrewarmOrchestrator? prewarm,
}) {
  final isAuthenticated = authState is AuthAuthenticated;
  final isAuthChecking = authState is AuthInitial || authState is AuthLoading;
  final isBootRoute = matchedLocation == AppRoutes.authBoot;
  final isAuthRoute =
      matchedLocation == AppRoutes.authLogin ||
      matchedLocation.startsWith('/login');
  final isHomeRoute = matchedLocation == AppRoutes.homeMain;
  final isProtected =
      isHomeRoute ||
      _protectedRoutes.any((route) => matchedLocation.startsWith(route));

  if (isAuthChecking && !isBootRoute) {
    return AppRoutes.authBoot;
  }
  if (!isAuthChecking && isBootRoute) {
    return isAuthenticated ? AppRoutes.homeMain : AppRoutes.authLogin;
  }
  if (!isAuthenticated && isProtected) {
    return AppRoutes.authLogin;
  }
  if (isAuthenticated && isAuthRoute) {
    return AppRoutes.homeMain;
  }
  return null;
}

Widget buildHomeRouteScreen(AuthState authState) {
  final userId = authState is AuthAuthenticated ? authState.user.id : null;
  return BlocProvider<ChatBloc>.value(
    value: sl<ChatBloc>(),
    child: HomeScreen(initialUserId: userId),
  );
}

GoRouter createAppRouter(AuthBloc authBloc) {
  final authRefresh = GoRouterRefreshStream(authBloc.stream);
  final prewarm = sl<AppPrewarmOrchestrator>();
  return GoRouter(
    initialLocation: AppRoutes.authBoot,
    observers: [appRouteObserver],
    refreshListenable: Listenable.merge([authRefresh, prewarm]),
    redirect: (context, state) {
      return resolveAuthRedirect(
        authState: authBloc.state,
        matchedLocation: state.matchedLocation,
        prewarm: prewarm,
      );
    },
    routes: [
      GoRoute(
        path: AppRoutes.authBoot,
        builder: (context, state) => const AuthBootScreen(),
      ),
      GoRoute(
        path: AppRoutes.calendarEventCreate,
        builder: (context, state) => CalendarEventCreateScreen(
          initialDate: parseYmd(state.uri.queryParameters['date']),
        ),
      ),
      GoRoute(
        path: '/calendar/events/:id',
        builder: (context, state) =>
            CalendarEventDetailScreen(eventId: state.pathParameters['id']!),
      ),
      GoRoute(
        path: '/calendar/events/:id/edit',
        builder: (context, state) =>
            CalendarEventEditScreen(eventId: state.pathParameters['id']!),
      ),
      GoRoute(
        path: '/calendar/events/:id/share',
        builder: (context, state) =>
            CalendarEventShareScreen(eventId: state.pathParameters['id']!),
      ),
      GoRoute(
        path: '/calendar/reminders/:id/alarm',
        builder: (context, state) =>
            CalendarReminderAlarmScreen(eventId: state.pathParameters['id']!),
      ),
      GoRoute(
        path: AppRoutes.authLogin,
        builder: (context, state) => const LoginScreen(),
      ),
      GoRoute(
        path: AppRoutes.homeMain,
        builder: (context, state) => buildHomeRouteScreen(authBloc.state),
      ),
      GoRoute(
        path: AppRoutes.messageInviteList,
        builder: (context, state) => const MessageInviteListScreen(),
      ),
      GoRoute(
        path: AppRoutes.contactsList,
        builder: (context, state) => const ContactsScreen(),
      ),
      GoRoute(
        path: '/contacts/:id',
        builder: (context, state) {
          final user = state.extra as UserBasicInfo;
          return ContactDetailScreen(user: user);
        },
      ),
      GoRoute(
        path: AppRoutes.calendarDayWeek,
        builder: (context, state) {
          final fromHome = state.uri.queryParameters['from'] == 'home';
          final initialDate = parseYmd(state.uri.queryParameters['date']);
          return CalendarDayWeekScreen(
            initialDate: initialDate,
            resetToToday: fromHome,
          );
        },
      ),
      GoRoute(
        path: AppRoutes.calendarMonth,
        builder: (context, state) {
          final fromHome = state.uri.queryParameters['from'] == 'home';
          return CalendarMonthScreen(resetToToday: fromHome);
        },
      ),
      GoRoute(
        path: AppRoutes.todoList,
        builder: (context, state) => const TodoQuadrantsScreen(),
      ),
      GoRoute(
        path: AppRoutes.todoCreate,
        builder: (context, state) => const TodoEditScreen.create(),
      ),
      GoRoute(
        path: '/todo/:id',
        builder: (context, state) =>
            TodoDetailScreen(todoId: state.pathParameters['id']!),
      ),
      GoRoute(
        path: '/todo/:id/edit',
        builder: (context, state) =>
            TodoEditScreen(todoId: state.pathParameters['id']!),
      ),
      GoRoute(
        path: AppRoutes.settingsMain,
        builder: (context, state) => const SettingsScreen(),
      ),
      GoRoute(
        path: AppRoutes.settingsFeatures,
        builder: (context, state) => const FeaturesScreen(),
      ),
      GoRoute(
        path: AppRoutes.settingsJobNew,
        builder: (context, state) => const JobDetailScreen(),
      ),
      GoRoute(
        path: '/settings/job/:id',
        builder: (context, state) =>
            JobDetailScreen(jobId: state.pathParameters['id']),
      ),
      GoRoute(
        path: AppRoutes.settingsMemory,
        builder: (context, state) => const MemoryScreen(),
      ),
      GoRoute(
        path: AppRoutes.settingsMemoryUser,
        builder: (context, state) => const UserMemoryViewScreen(),
      ),
      GoRoute(
        path: AppRoutes.settingsMemoryWork,
        builder: (context, state) => const WorkMemoryViewScreen(),
      ),
      GoRoute(
        path: AppRoutes.settingsMemoryUserEdit,
        builder: (context, state) => const UserMemoryDetailScreen(),
      ),
      GoRoute(
        path: AppRoutes.settingsMemoryWorkEdit,
        builder: (context, state) => const WorkMemoryDetailScreen(),
      ),
      GoRoute(
        path: AppRoutes.settingsEditProfile,
        builder: (context, state) => const EditProfileScreen(),
      ),
    ],
  );
}