import 'package:bus_running_record/pages/home/page.dart' as home_v2;
import 'package:bus_running_record/pages/home_page.dart' as legacy_home;
import "package:bus_running_record/pages/operations_upload/page.dart";
import "package:bus_running_record/pages/invite/page.dart";
import "package:bus_running_record/pages/org_settings/page.dart";
import "package:bus_running_record/pages/auth/page.dart";
import "package:bus_running_record/pages/auth/verify_email_page.dart";
import "package:bus_running_record/pages/station_selection_page.dart";
import "package:bus_running_record/pages/trip_list_page.dart";
import "package:bus_running_record/provider/collaboration_state.dart";
import "package:bus_running_record/provider/supabase_state.dart";
import "package:bus_running_record/constants.dart";
import 'package:flutter/foundation.dart';
import 'package:go_router/go_router.dart';
import 'package:hive_flutter/hive_flutter.dart';
import 'package:provider/provider.dart';
import 'package:shadcn_flutter/shadcn_flutter.dart';
import 'package:supabase_flutter/supabase_flutter.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Hive.initFlutter();
  await Supabase.initialize(
    url: kSupabaseEndpoint,
    anonKey: kSupabasePublishableKey,
  );
  final supabaseProvider = SupabaseProvider();
  runApp(RoadboundApp(supabaseProvider: supabaseProvider));
}

class RoadboundApp extends StatefulWidget {
  const RoadboundApp({required this.supabaseProvider, super.key});

  final SupabaseProvider supabaseProvider;

  @override
  State<RoadboundApp> createState() => _RoadboundAppState();
}

class _RoadboundAppState extends State<RoadboundApp> {
  late final GoRouter _routerConfig = GoRouter(
    refreshListenable: widget.supabaseProvider,
    routes: [
      LoginPage.route,
      VerifyEmailPage.route,
      home_v2.HomePage.rootRoute,
      home_v2.HomePage.channelRoute,
      legacy_home.HomePage.route,
      StationSelectionPage.route,
      TripListPage.route,
      OperationsUploadPage.route,
      InvitePage.route,
      OrganizationSettingsPage.route,
    ],
    redirect: (context, state) {
      final isLoggedIn = widget.supabaseProvider.isAuthenticated;
      final isValidatingSession = widget.supabaseProvider.isValidatingSession;
      final hasSession = widget.supabaseProvider.session != null;
      final requestedPath = state.uri.path;
      final onLogin = requestedPath == LoginPage.routePath;
      final onVerify = requestedPath == VerifyEmailPage.routePath;
      final onInvite = requestedPath.startsWith("/invite/");
      final onLegacyFlow =
          requestedPath == legacy_home.HomePage.routePath ||
          requestedPath == StationSelectionPage.routePath ||
          requestedPath == TripListPage.routePath;
      if (onVerify) return null;
      if (onInvite) return null;
      if (onLegacyFlow) return null;
      // Avoid login flash on cold start: keep current route until
      // persisted session validation completes.
      if (hasSession && isValidatingSession) return null;
      if (!isLoggedIn && !onLogin) return LoginPage.routePath;
      if (isLoggedIn && onLogin) {
        final next = state.uri.queryParameters["next"];
        return (next != null && next.isNotEmpty) ? next : "/";
      }
      return null;
    },
  );

  @override
  Widget build(BuildContext context) {

    AdaptiveScaling? adaptiveScaling;
    if (defaultTargetPlatform == TargetPlatform.iOS) {
      adaptiveScaling = AdaptiveScaling(1.15);
    }

    return MultiProvider(
      providers: [
        ChangeNotifierProvider.value(value: widget.supabaseProvider),
        ChangeNotifierProvider(
          create: (context) =>
              CollaborationProvider(context.read<SupabaseProvider>())
                ..initialize(),
        ),
      ],
      child: ShadcnApp.router(
        routerConfig: _routerConfig,
        scaling: adaptiveScaling,
        theme: ThemeData(
          colorScheme: ColorSchemes.darkNeutral,
        ),
      ),
    );
  }
}