import 'package:core/utils/app_logger.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:tmail_ui_user/features/push_notification/presentation/controller/fcm_message_controller.dart';
import 'package:tmail_ui_user/features/push_notification/presentation/services/fcm_service.dart';

@pragma('vm:entry-point')
Future<void> handleFirebaseBackgroundMessage(RemoteMessage message) async {
  FcmService.instance.initialStreamController();
  FcmMessageController.instance.initialize();
  FcmService.instance.handleFirebaseBackgroundMessage(message);
}

class FcmReceiver {
  FcmReceiver._internal();

  static final FcmReceiver _instance = FcmReceiver._internal();

  static FcmReceiver get instance => _instance;

  static const int MAX_COUNT_RETRY_TO_GET_FCM_TOKEN = 3;

  Future onInitialFcmListener() async {
    _onBackgroundMessage();

    await _onHandleFcmToken();
  }

  void _onBackgroundMessage() {
    FirebaseMessaging.onBackgroundMessage(handleFirebaseBackgroundMessage);
  }

  Future<String?> _getInitialToken() async {
    try {
      final token = await FirebaseMessaging.instance.getToken();
      log('FcmReceiver::_getInitialToken:token: $token');
      return token;
    } catch (e) {
      logWarning('FcmReceiver::_getInitialToken: TYPE = ${e.runtimeType} | Exception = $e');
      return null;
    }
  }

  Future _onHandleFcmToken() async {
    final token = await _getInitialToken();
    FcmService.instance.handleToken(token);

    FirebaseMessaging.instance.onTokenRefresh.listen((newToken) {
      log('FcmReceiver::_onHandleFcmToken:onTokenRefresh: $newToken');
      if (newToken != token) {
        FcmService.instance.handleToken(newToken);
      }
    });
  }
}