import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:shared_preferences/shared_preferences.dart';
import '../constants.dart';
import '../services/auth/auth_gate.dart';
import '../themes/theme_provider.dart';
import 'package:flutter/material.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:provider/provider.dart';
import 'firebase_options.dart';
import 'pages/conversations_page.dart';
import 'pages/liked_users_page.dart';
import 'pages/user_matching_page.dart';
import 'pages/user_profile_page.dart';
import 'services/swipe_stream_service.dart';

void main() async {
  // Firebase stuff
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );

  // Init SharedPreferences
  final prefs = await SharedPreferences.getInstance();
  final isDarkMode = prefs.getBool(Constants.prefKeyThemeDarkMode) ?? false;

  final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
      FlutterLocalNotificationsPlugin();
  flutterLocalNotificationsPlugin.resolvePlatformSpecificImplementation<
      AndroidFlutterLocalNotificationsPlugin>()?.requestNotificationsPermission();
  const AndroidInitializationSettings initializationSettingsAndroid =
      AndroidInitializationSettings('@mipmap/ic_launcher');
  const InitializationSettings initializationSettings =
      InitializationSettings(android: initializationSettingsAndroid);
  await flutterLocalNotificationsPlugin.initialize(initializationSettings,
      onDidReceiveNotificationResponse: (NotificationResponse response) {
    // Handle the notification tap
    if (response.payload != null) {
      Navigator.push(
        navigatorKey.currentState!.context,
        MaterialPageRoute(
          builder: (BuildContext context) => UserProfilePage(
            userId: response.payload,
            titleText: 'Your new Match',
          ),
        ),
      );
    }
  });

  // create notification channel
  const channel = AndroidNotificationChannel(
    'new_match_info_channel_id',
    'New Match Info Channel',
  );
  flutterLocalNotificationsPlugin
      .resolvePlatformSpecificImplementation<
          AndroidFlutterLocalNotificationsPlugin>()
      ?.createNotificationChannel(channel);

  // Initialize the singleton instance with a dummy userId.
  // The actual userId is set later in the HomePage.
  SwipeStreamService()
      .initialize('dummy_initial_user_id', flutterLocalNotificationsPlugin);

  runApp(
    MultiProvider(
      providers: [
        ChangeNotifierProvider(
            create: (context) => ThemeProvider(initialIsDarkMode: isDarkMode)),
        Provider<FlutterLocalNotificationsPlugin>.value(
            value: flutterLocalNotificationsPlugin),
      ],
      child: const MyApp(),
    ),
  );
}

// Global key for navigation
final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: Constants.appTitle,
      theme: Provider.of<ThemeProvider>(context).themeData,
      navigatorKey: navigatorKey,
      home: const AuthGate(),
      routes: {
        '/discover': (context) => const UserMatchingPage(),
        '/favorites': (context) => const LikedUsersPage(),
        '/chats': (context) => ConversationsPage(),
        '/profile': (context) => const UserProfilePage(),
      },
    );
  }
}