import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart'; // Import this
import 'package:provider/provider.dart';
import 'package:shadcn_ui/shadcn_ui.dart';
import 'package:supplements/logging.dart';

import 'providers/settings_provider.dart';
import 'providers/simple_sync_provider.dart';
import 'providers/supplement_provider.dart';
import 'screens/home_screen.dart';
import 'services/notification_router.dart';
import 'services/simple_notification_service.dart';

final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();

// Top-level function to handle notification responses in the background
@pragma('vm:entry-point')
void notificationTapBackground(NotificationResponse notificationResponse) {
  // handle action here
  printLog('Background notification action tapped: ${notificationResponse.actionId}');
  NotificationRouter.instance.handleNotificationResponse(notificationResponse);
}

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  // Initialize SimpleNotificationService early
  await SimpleNotificationService.instance.initialize(
    onDidReceiveBackgroundNotificationResponse: notificationTapBackground,
  );

  final settingsProvider = SettingsProvider();
  await settingsProvider.initialize();

  runApp(MyApp(settingsProvider: settingsProvider));
}

class MyApp extends StatelessWidget {
  final SettingsProvider settingsProvider;

  const MyApp({super.key, required this.settingsProvider});

  @override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: [
        ChangeNotifierProvider(
          create: (context) => SupplementProvider()..initialize(context),
        ),
        ChangeNotifierProvider.value(
          value: settingsProvider,
        ),
        ChangeNotifierProvider(
          create: (context) => SimpleSyncProvider(),
        ),
      ],
      child: Consumer2<SettingsProvider, SimpleSyncProvider>(
        builder: (context, settingsProvider, syncProvider, child) {
          // Set up the sync completion callback to refresh supplement data
          // and initialize auto-sync integration
          WidgetsBinding.instance.addPostFrameCallback((_) {
            final supplementProvider = context.read<SupplementProvider>();

            // Initialize notification router with the app's navigator
            // This is done here because navigatorKey is only available after MaterialApp is built
            NotificationRouter.instance.initialize(navigatorKey);

            // If the app was launched via a notification, route to the proper dialog
            // This needs to be called after the router is initialized with the navigatorKey
            SimpleNotificationService.instance.getLaunchDetails().then((details) {
              NotificationRouter.instance.handleAppLaunchDetails(details);
            });

            // Set up sync completion callback
            syncProvider.setOnSyncCompleteCallback(() async {
              if (kDebugMode) {
                printLog('Sync completed, refreshing UI data...');
              }
              await supplementProvider.loadSupplements();
              await supplementProvider.loadTodayIntakes();
              if (kDebugMode) {
                printLog('UI data refreshed after sync');
              }
            });

            // Initialize auto-sync service
            syncProvider.initializeAutoSync(settingsProvider);

            // Set up auto-sync callback for data changes
            supplementProvider.setOnDataChangedCallback(() {
              syncProvider.triggerAutoSyncIfEnabled();
            });
          });

          return ShadApp(
            navigatorKey: navigatorKey,
            title: 'Supplements Tracker',
            theme: ShadThemeData(
              brightness: Brightness.light,
              colorScheme: const ShadZincColorScheme.light(),
            ),
            darkTheme: ShadThemeData(
              brightness: Brightness.dark,
              colorScheme: const ShadZincColorScheme.dark(),
            ),
            themeMode: settingsProvider.themeMode,
            home: const HomeScreen(),
            debugShowCheckedModeBanner: false,
          );
        },
      ),
    );
  }
}