import 'dart:convert';
import 'dart:io';
import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:get/get.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:package_info_plus/package_info_plus.dart';
import 'package:new_version_plus/new_version_plus.dart';
import 'package:http/http.dart' as http;

import 'Controller/Internetcheck/check_internet.dart';
import 'Globalwidgets/Localnotificationservice.dart';
import 'Globalwidgets/binding.dart';
import 'Helper/Constants/Apiconstants.dart';
import 'Helper/Constants/Colorconstants.dart';
import 'Helper/Constants/api_config.dart';
import 'Helper/Logger.dart';
import 'Helper/Locationservice/app_config_service.dart';
import 'View/Home/Homeview.dart';
import 'View/Introscreen/Introscreenview.dart';
import 'View/Update/Updateview.dart';

/// ---------------------------------------------------------------------------
/// 1. GLOBAL NOTIFICATION OBJECTS
/// ---------------------------------------------------------------------------
final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
FlutterLocalNotificationsPlugin();

final AndroidNotificationChannel channel = AndroidNotificationChannel(
  'Nearlexpress Business',               // id
  'Nearlexpress Business Notifications', // name
  description: 'Nearlexpress Business',
  importance: Importance.high,
  sound: const RawResourceAndroidNotificationSound('ring'), // raw/ring.mp3
  enableLights: true,
  enableVibration: true,
  playSound: true,
  showBadge: true,
  vibrationPattern: Int64List.fromList(const [500, 1000, 500]),
);

/// ---------------------------------------------------------------------------
/// 2. BACKGROUND MESSAGE HANDLER (must be top-level)
/// ---------------------------------------------------------------------------
@pragma('vm:entry-point')
Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  await Firebase.initializeApp();

  // Initialize local notifications in background isolate
  const AndroidInitializationSettings initializationSettingsAndroid =
  AndroidInitializationSettings('@mipmap/ic_launcher');

  const DarwinInitializationSettings initializationSettingsIOS =
  DarwinInitializationSettings();

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

  await flutterLocalNotificationsPlugin.initialize(initializationSettings);

  // Create notification channel
  final AndroidNotificationChannel channel = AndroidNotificationChannel(
    'Nearlexpress Business',
    'Nearlexpress Business Notifications',
    description: 'Nearlexpress Business',
    importance: Importance.high,
    sound: const RawResourceAndroidNotificationSound('ring'),
    playSound: true,
    enableVibration: true,
    vibrationPattern: Int64List.fromList(const [500, 1000, 500]),
  );

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

  // === LOAD LOGO FROM ASSETS IN BACKGROUND ===
  final ByteData logoData = await rootBundle.load('assets/images/nearlebusiness.png');
  final Uint8List logoBytes = logoData.buffer.asUint8List();

  // Show notification if it has title/body
  if (message.notification != null) {
    await flutterLocalNotificationsPlugin.show(
      message.hashCode,
      message.notification!.title,
      message.notification!.body,
      NotificationDetails(
        android: AndroidNotificationDetails(
          channel.id,
          channel.name,
          channelDescription: channel.description,
          importance: Importance.high,
          priority: Priority.high,
          icon: '@mipmap/ic_launcher',
          sound: const RawResourceAndroidNotificationSound('ring'),
          enableVibration: true,
          vibrationPattern: Int64List.fromList([500, 1000, 500]),
          playSound: true,
          color: const Color(0xFF662582),
          largeIcon: ByteArrayAndroidBitmap(logoBytes), // LOGO ON RIGHT
          styleInformation: BigPictureStyleInformation(
            ByteArrayAndroidBitmap(logoBytes),
            largeIcon: ByteArrayAndroidBitmap(logoBytes),
            contentTitle: message.notification!.title,
            htmlFormatContentTitle: true,
          ),
        ),
        iOS: const DarwinNotificationDetails(
          sound: 'ring.wav',
        ),
      ),
      payload: jsonEncode(message.data.isNotEmpty ? message.data : {
        "type": message.notification?.android?.tag ?? ""
      }),
    );
  }
}

/// ---------------------------------------------------------------------------
/// 3. LOCAL NOTIFICATION HELPER (foreground + background)
/// ---------------------------------------------------------------------------
Future<void> _showLocalNotification(RemoteMessage message) async {
  final notification = message.notification;
  if (notification == null) return;

  // === LOAD LOGO FROM ASSETS ===
  final ByteData logoData = await rootBundle.load('assets/images/nearle_logo.jpeg');
  final Uint8List logoBytes = logoData.buffer.asUint8List();

  final AndroidNotificationDetails androidDetails = AndroidNotificationDetails(
    channel.id,
    channel.name,
    channelDescription: channel.description,
    importance: channel.importance,
    priority: Priority.high,
    sound: channel.sound,
    enableVibration: channel.enableVibration,
    vibrationPattern: channel.vibrationPattern,
    playSound: channel.playSound,
    enableLights: channel.enableLights,
    icon: '@mipmap/ic_launcher',
    color: const Color(0xFF662582),
    largeIcon: ByteArrayAndroidBitmap(logoBytes), // LOGO ON RIGHT
    styleInformation: BigPictureStyleInformation(
      ByteArrayAndroidBitmap(logoBytes),
      largeIcon: ByteArrayAndroidBitmap(logoBytes),
      contentTitle: notification.title,
      summaryText: notification.body,
      htmlFormatContentTitle: true,
      htmlFormatSummaryText: true,
    ),
  );

  const DarwinNotificationDetails iOSDetails = DarwinNotificationDetails(
    sound: 'ring.mp3',
    presentAlert: true,
    presentBadge: true,
    presentSound: true,
  );

  final NotificationDetails platformDetails =
  NotificationDetails(android: androidDetails, iOS: iOSDetails);

  await flutterLocalNotificationsPlugin.show(
    notification.hashCode,
    notification.title,
    notification.body,
    platformDetails,
    payload: jsonEncode(message.data.isNotEmpty ? message.data : {
      "type": message.notification?.android?.tag ?? ""
    }),
  );
}

/// ---------------------------------------------------------------------------
/// 4. NOTIFICATION TAP HANDLER
/// ---------------------------------------------------------------------------
void _handleNotificationTap(Map<String, dynamic> data) {
  final type = data['type']?.toString();
  print('Notification tapped – type: $type');

  if (type == 'tojoin') {
    Get.toNamed('/join');
  }
}

/// ---------------------------------------------------------------------------
/// 5. HTTP OVERRIDE (dev only – remove in production)
/// ---------------------------------------------------------------------------
class MyHttpOverrides extends HttpOverrides {
  @override
  HttpClient createHttpClient(SecurityContext? context) {
    return super.createHttpClient(context)
      ..badCertificateCallback = (cert, host, port) => true;
  }
}

/// ---------------------------------------------------------------------------
/// 6. MAIN
/// ---------------------------------------------------------------------------
Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();


  SystemChrome.setSystemUIOverlayStyle(
    const SystemUiOverlayStyle(
      statusBarColor: Colors.transparent, // or your color
      statusBarIconBrightness: Brightness.dark, // Android icons
      statusBarBrightness: Brightness.light, // iOS icons
    ),
  );


  // Allow self-signed certs (dev only)
  HttpOverrides.global = MyHttpOverrides();

  await Firebase.initializeApp();

  // ---------- LOCAL NOTIFICATIONS INITIALISATION ----------
  const AndroidInitializationSettings androidInit =
  AndroidInitializationSettings('@mipmap/ic_launcher');

  const DarwinInitializationSettings iOSInit = DarwinInitializationSettings(
    requestAlertPermission: true,
    requestBadgePermission: true,
    requestSoundPermission: true,
  );

  const InitializationSettings initSettings =
  InitializationSettings(android: androidInit, iOS: iOSInit);

  await flutterLocalNotificationsPlugin.initialize(
    initSettings,
  );

  // Create Android channel (mandatory for Android 8+)
  final androidPlugin = flutterLocalNotificationsPlugin
      .resolvePlatformSpecificImplementation<
      AndroidFlutterLocalNotificationsPlugin>();
  await androidPlugin?.createNotificationChannel(channel);

  // ---------- FCM ----------
  FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);

  await FirebaseMessaging.instance
      .setForegroundNotificationPresentationOptions(
    alert: true,
    badge: true,
    sound: true,
  );

  SystemChrome.setPreferredOrientations([
    DeviceOrientation.portraitUp,
    DeviceOrientation.portraitDown,
  ]);

  ApiConfig.setLive(); // 👈 clean call
  // Dependency injection
  Get.put(ConnectivityController());

  runApp(const MyApp());
}

/// ---------------------------------------------------------------------------
/// 7. APP WIDGET
/// ---------------------------------------------------------------------------
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      title: 'Nearlexpress Business',
      debugShowCheckedModeBanner: false,
      initialBinding: GlobalBinding(),
      navigatorKey: MyHomePageOne.mNavigationState,
      theme: ThemeData(
        primaryColor: ColorConstants.primaryColor,
        useMaterial3: false,
        scaffoldBackgroundColor: Colors.grey.shade200,
        appBarTheme: AppBarTheme(
          iconTheme:
          IconThemeData(color: ColorConstants.secondaryColor),
          color: ColorConstants.secondaryColor,
          elevation: 0,
          titleTextStyle: TextStyle(
            color: ColorConstants.secondaryColor,
            fontSize: 18,
          ),
        ),
        fontFamily: 'Lato',
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: const SafeArea(top: false, child: MyHomePageOne()),
    );
  }
}

/// ---------------------------------------------------------------------------
/// 8. HOME PAGE (FCM + UI logic)
/// ---------------------------------------------------------------------------
class MyHomePageOne extends StatefulWidget {
  static final GlobalKey<NavigatorState> mNavigationState =
  GlobalKey<NavigatorState>();
  const MyHomePageOne({Key? key}) : super(key: key);

  @override
  State<MyHomePageOne> createState() => _MyHomePageOneState();
}

class _MyHomePageOneState extends State<MyHomePageOne> {
  final AppConfigurationService _appConfig = AppConfigurationService();

  String? _tenantFcmToken;
  String? _tenantContact;
  int? _moduleId;
  int? _tenantId;

  @override
  void initState() {
    super.initState();
    _initApp();
  }

  Future<void> _initApp() async {
    await _loadPrefs();
    await _setupFCM();
    await _getAppVersion();
    _checkForUpdate(context);
    _fetchLocation();
    _appConfig.getAppConfig("${ApiConstants.configUrl}?configid=1");
    LocalNotificationService.initialize(context);
  }

  Future<void> _loadPrefs() async {
    final prefs = await SharedPreferences.getInstance();
    setState(() {
      _tenantFcmToken = prefs.getString('tenantFcmToken');
      _tenantContact = prefs.getString('tenantContactNo');
      _moduleId = prefs.getInt('moduleId');
      _tenantId = prefs.getInt('tenantId');
    });
  }

  Future<void> _setupFCM() async {
    final settings = await FirebaseMessaging.instance.requestPermission(
      alert: true,
      badge: true,
      sound: true,
    );
    print('FCM permission: ${settings.authorizationStatus}');

    final token = await FirebaseMessaging.instance.getToken();
    print('=== FCM TOKEN ===\n$token\n=================');
    final prefs = await SharedPreferences.getInstance();
    await prefs.setString('fcmToken', token!);

    FirebaseMessaging.onMessage.listen((RemoteMessage msg) async {
      print('FOREGROUND: ${msg.notification?.title}');
      await _showLocalNotification(msg);
    });

    FirebaseMessaging.onMessageOpenedApp.listen((RemoteMessage msg) {
      print('OPENED FROM NOTIFICATION');
      _handleNotificationTap(msg.data);
    });
  }

  String currentVersion = '';
  Future<void> _getAppVersion() async {
    final packageInfo = await PackageInfo.fromPlatform();
    currentVersion = packageInfo.version;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setString('CurrentVersion', currentVersion);
    logger.i('Current version: $currentVersion');
  }

  Future<void> _checkForUpdate(BuildContext context) async {
    final newVersion = NewVersionPlus(
      iOSId: '284882215',
      androidId: "com.nearle.bond",
    );
    final status = await newVersion.getVersionStatus();
    if (status != null && status.canUpdate) {
      Get.to(() => UpdateAppPage(
        mCurrentVersion: status.localVersion,
        mUpdateVersion: status.storeVersion,
      ));
    }
  }

  Future<void> _fetchLocation() async {
    final url = Uri.http('ip-api.com', '/json');
    try {
      final response = await http.get(url);
      if (response.statusCode == 200) {
        final data = jsonDecode(response.body);
        final country = data['countryCode'].toString();
        final city = data['city'].toString();

        final prefs = await SharedPreferences.getInstance();
        await prefs.setString('location_Country', country);
        await prefs.setString('MainCity', city);
        await prefs.setString('location_CountryCode', country);
      }
    } catch (e) {
      print('Location error: $e');
    }
  }

  @override
  Widget build(BuildContext context) {
    return (_tenantFcmToken == null && _tenantContact == null)
        ? IntroScreenView()
        : HomeView(selectedIndex: 0);
  }
}