import 'dart:io';
import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';

import 'package:huawei_push/huawei_push.dart' as huawei_push;
import 'package:mohem_flutter_app/app_state/app_state.dart';
import 'package:mohem_flutter_app/classes/chat_call_kit.dart';
import 'package:mohem_flutter_app/classes/utils.dart';
import 'package:mohem_flutter_app/main.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:uuid/uuid.dart';

final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();

class AppNotifications {
  static final AppNotifications _instance = AppNotifications._internal();

  AppNotifications._internal();

  factory AppNotifications() => _instance;

  // late HmsApiAvailability hmsApiAvailability;

  String _huaweiToken = '';

  Future<void> requestPermissions() async {
    if (Platform.isIOS) {
      await flutterLocalNotificationsPlugin.resolvePlatformSpecificImplementation<IOSFlutterLocalNotificationsPlugin>()?.requestPermissions(alert: true, badge: true, sound: true);
    } else if (Platform.isAndroid) {
      AndroidFlutterLocalNotificationsPlugin? androidImplementation = flutterLocalNotificationsPlugin.resolvePlatformSpecificImplementation<AndroidFlutterLocalNotificationsPlugin>();
      bool? granted = await androidImplementation?.requestPermission();
      if (granted == false) {
        if (kDebugMode) {
          print("-------------------- Permission Granted ------------------------");
          print(granted);
        }
        await Permission.notification.request();
      }
    }
  }

  void init(String? firebaseToken) async {
    // if (Platform.isAndroid) {
    //   hmsApiAvailability = HmsApiAvailability();
    // }
    print("Firebase init");
    await requestPermissions();
    AppState().setDeviceToken = firebaseToken;
    await Permission.notification.isDenied.then((bool value) {
      if (value) {
        Permission.notification.request();
      }
    });

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

    RemoteMessage? initialMessage = await FirebaseMessaging.instance.getInitialMessage();

    if (initialMessage != null) _handleMessage(initialMessage);

    FirebaseMessaging.onMessage.listen((RemoteMessage message) {
      if (message != null) _handleMessage(message);
    });

    FirebaseMessaging.onMessageOpenedApp.listen(_handleOpenApp);

    FirebaseMessaging.onBackgroundMessage(backgroundMessageHandler);

    FirebaseMessaging.instance.onTokenRefresh.listen((String token) {
      AppState().setDeviceToken = token;
    });

    if (Platform.isAndroid) {
      // await hmsApiAvailability.isHMSAvailable().then((value) async {
      if (!(await Utils.isGoogleServicesAvailable())) {
        huawei_push.Push.enableLogger();
        var result = await huawei_push.Push.setAutoInitEnabled(true);

        huawei_push.Push.onNotificationOpenedApp.listen((message) {
          // newMessage(toFirebaseRemoteMessage(message));
        }, onError: (e) => print(e.toString()));

        huawei_push.Push.onMessageReceivedStream.listen((message) {
          // newMessage(toFirebaseRemoteMessage(message));
        }, onError: (e) => print(e.toString()));
      }
      // }).catchError((err) {
      //   print(err);
      // });
    }
  }

  void initHuaweiPush(Function loginCallback) {
    AppState().setIsHuawei = true;
    initTokenStream(loginCallback);
    huawei_push.Push.getToken("");
  }

  // HUAWEI PUSH TOKEN IMPLEMENTATION
  void _onTokenEvent(String event) {
    _huaweiToken = event;
    AppState().setHuaweiPushToken = _huaweiToken;
    debugPrint("HUAWEI PUSH TOKEN: $_huaweiToken");
  }

  void _onTokenError(Object error) {}

  Future<void> initTokenStream(Function loginCallback) async {
    huawei_push.Push.getTokenStream.listen(_onTokenEvent, onError: _onTokenError).onData((data) {
      AppState().setHuaweiPushToken = data;
      debugPrint("HUAWEI PUSH TOKEN: $data");
      loginCallback();
    });
  }

  void _handleMessage(RemoteMessage message) {
    Utils.saveStringFromPrefs("isAppOpendByChat", "false");
    if (message.data.isNotEmpty && message.data["messageType"] == 'chat') {
      Utils.saveStringFromPrefs("isAppOpendByChat", "true");
      Utils.saveStringFromPrefs("notificationData", message.data["user_chat_history_response"].toString());
    } else if (message.data.isNotEmpty && message.data["messageType"] == 'call') {
      if (Platform.isAndroid) {
        ChatVoipCall().showCallkitIncoming(uuid: const Uuid().v4(), data: message);
      }
    }
  }

  void _handleOpenApp(RemoteMessage message) {
    if (message.data.isNotEmpty && message.data["type"] == 'chat') {
      Utils.saveStringFromPrefs("isAppOpendByChat", "true");
      Utils.saveStringFromPrefs("notificationData", message.data["user_chat_history_response"].toString());
    }
  }


}

const AndroidNotificationChannel channel = AndroidNotificationChannel(
  'high_importance_channel', // id
  'High Importance Notifications', // title
  description: 'This channel is used for important notifications.', // description
  importance: Importance.high,
);

@pragma('vm:entry-point')
Future<void> backgroundMessageHandler(RemoteMessage message) async {
  await Firebase.initializeApp();
  if (message.data.isNotEmpty && message.data["messageType"] == 'chat') {
    Utils.saveStringFromPrefs("isAppOpendByChat", "false");
    Utils.saveStringFromPrefs("notificationData", message.data["user_chat_history_response"].toString());
  } else if (message.data.isNotEmpty && message.data["messageType"] == 'call') {
    if (Platform.isAndroid) {
      ChatVoipCall().showCallkitIncoming(uuid: const Uuid().v4(), data: message, background: true);
    }
  }
}