import 'dart:async';
import 'dart:io';
import 'dart:ui';

//import 'package:apkcoba/bottom_navigation.dart';
import 'package:flutter/material.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:device_info_plus/device_info_plus.dart';
import 'package:flutter_background_service/flutter_background_service.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:firebase_database/firebase_database.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:cloud_firestore/cloud_firestore.dart';

// Import halaman
import 'history_page.dart';
import 'notifikasi_page.dart';
import 'profile_page.dart';
import 'splash_screen.dart';
import 'login_screen.dart';
import 'signup_screen.dart';
import 'home_screen.dart';
import 'firebase_options.dart';
import 'jadwal_kotak_obat1_screen.dart';
import 'atur_jadwal1_screen.dart';
import 'jadwal_kotak_obat2_screen.dart';
import 'atur_jadwal2_screen.dart';
import 'notifikasi_service.dart';
import 'bottom_navigation.dart';
// import 'background_service.dart';

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

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();

  // Firebase initialization untuk Web dan Non-Web
  if (kIsWeb) {
    await Firebase.initializeApp(
      options: const FirebaseOptions(
        apiKey: "AIzaSyAUVen3yiSUrNJw7HnRif0_IBmUdeStY0c",
        appId: "1:531750565610:web:5acfbccca5e41ee8404993",
        messagingSenderId: "531750565610",
        projectId: "coba-smartmedibox",
        databaseURL: "https://coba-smartmedibox-default-rtdb.firebaseio.com",
      ),
    );
  } else {
    await Firebase.initializeApp(
      options: DefaultFirebaseOptions.currentPlatform,
    );
  }
  await initializeService();
  //await NotifikasiService.init(); // Tambahkan ini supaya plugin notifikasi lokal siap
  //NotifikasiService.listenToAllNotifikasi();

  //await initializeNotifications();
  //await initializeService();

  runApp(const MyApp());
}

Future<void> initializeService() async {
  final service = FlutterBackgroundService();

  /// OPTIONAL, using custom notification channel id
  const AndroidNotificationChannel channel = AndroidNotificationChannel(
    'my_foreground', // id
    'MY FOREGROUND SERVICE', // title
    description:
        'This channel is used for important notifications.', // description
    importance: Importance.low, // importance must be at low or higher level
  );

  final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
      FlutterLocalNotificationsPlugin();

  const AndroidInitializationSettings initializationSettingsAndroid =
      AndroidInitializationSettings('@mipmap/ic_launcher'); // TANPA .png

  const InitializationSettings initializationSettings = InitializationSettings(
    android: initializationSettingsAndroid,
  );

  await flutterLocalNotificationsPlugin.initialize(initializationSettings);

  await flutterLocalNotificationsPlugin
      .resolvePlatformSpecificImplementation<
        AndroidFlutterLocalNotificationsPlugin
      >()
      ?.createNotificationChannel(channel);

  await service.configure(
    androidConfiguration: AndroidConfiguration(
      // this will be executed when app is in foreground or background in separated isolate
      onStart: onStart,

      // auto start service
      autoStart: true,
      isForegroundMode: true,

      notificationChannelId: 'my_foreground',
      initialNotificationTitle: 'Smart Medicine Box',
      initialNotificationContent: 'Medibox Sedang Berjalan',
      foregroundServiceNotificationId: 888,

      foregroundServiceTypes: [AndroidForegroundType.location],
    ),
    iosConfiguration: IosConfiguration(
      // auto start service
      autoStart: true,

      // this will be executed when app is in foreground in separated isolate
      onForeground: onStart,

      // you have to enable background fetch capability on xcode project
      onBackground: onIosBackground,
    ),
  );
}

// to ensure this is executed
// run app from xcode, then from xcode menu, select Simulate Background Fetch

@pragma('vm:entry-point')
Future<bool> onIosBackground(ServiceInstance service) async {
  WidgetsFlutterBinding.ensureInitialized();
  DartPluginRegistrant.ensureInitialized();

  SharedPreferences preferences = await SharedPreferences.getInstance();
  await preferences.reload();
  final log = preferences.getStringList('log') ?? <String>[];
  log.add(DateTime.now().toIso8601String());
  await preferences.setStringList('log', log);

  return true;
}

@pragma('vm:entry-point')
void onStart(ServiceInstance service) async {
  DartPluginRegistrant.ensureInitialized();
  await Firebase.initializeApp();
  print('✅ Firebase initialized');

  SharedPreferences prefs = await SharedPreferences.getInstance();
  String? userId;
  int retry = 0;

  while ((userId = prefs.getString('userId')) == null && retry < 30) {
    print("⏳ Menunggu userId tersimpan... [percobaan ke-$retry]");
    await Future.delayed(Duration(seconds: 2));
    await prefs.reload();
    retry++;
  }

  if (userId == null) {
    print(
      "❌ Gagal mendapatkan userId setelah beberapa percobaan. onStart dihentikan.",
    );
    return;
  }

  print("✅ userId ditemukan: $userId");

  await NotifikasiService.init();

  if (userId != null) {
    print('✅ Memulai listener notifikasi...');
    await NotifikasiService.listenToAllNotifikasiWithUserId(userId);
    syncTimestampIfAuthorizedWithListener(userId);
  }

  final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
      FlutterLocalNotificationsPlugin();

  if (service is AndroidServiceInstance) {
    service.on('setAsForeground').listen((event) {
      service.setAsForegroundService();
    });

    service.on('setAsBackground').listen((event) {
      service.setAsBackgroundService();
    });
  }

  service.on('stopService').listen((event) {
    service.stopSelf();
  });
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      navigatorKey: navigatorKey,
      title: 'SmartMediBox',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.green),
        useMaterial3: true,
      ),
      home: const SplashScreen(),
      routes: {
        '/login': (context) => const LoginScreen(),
        '/signUp': (context) => const SignUpScreen(),
        '/home': (context) => const MainNavigation(currentIndex: 0),
        '/home2': (context) => HomeScreen(username: '', onSignOut: () {}),
        '/jadwalKotakObat1': (context) => const JadwalKotakObat1Screen(),
        '/aturJadwal1': (context) => const AturJadwal1Screen(),
        '/jadwalKotakObat2': (context) => const JadwalKotakObat2Screen(),
        '/aturJadwal2': (context) => const AturJadwal2Screen(),
        '/historyPage': (context) => const HistoryPage(),
        '/notifikasiPage': (context) => const NotifikasiPage(),
        '/profilePage': (context) => const ProfilePage(),
      },
    );
  }
}