initialize method

Future<void> initialize({ dynamic onEvent(CallEvent)?, })

Initialize the VoIP service onEvent is a callback when the user accepts the call

Implementation

Future<void> initialize({Function(CallEvent)? onEvent}) async {
  if (_isInitialized) return;

  // Initialize Firebase if not already
  try {
    if (Firebase.apps.isEmpty) {
      await Firebase.initializeApp();
    }
  } catch (e) {
    print("Firebase Init Error: $e");
  }

  // Android: FCM Setup
  if (Platform.isAndroid) {
    FirebaseMessaging.onBackgroundMessage(
      _firebaseMessagingBackgroundHandler,
    );

    // Foreground handler
    FirebaseMessaging.onMessage.listen((RemoteMessage message) {
      if (message.data.isNotEmpty &&
          message.data['callType'] == 'voip_incoming') {
        showIncomingCall(message.data);
      }
    });
  }

  // iOS: Initialize Native Plugin
  if (Platform.isIOS) {
    await _channel.invokeMethod('initialize');
    _channel.setMethodCallHandler((call) async {
      if (call.method == 'onVoipToken') {
        final token = call.arguments as String?;
        print("Received VoIP Token via Plugin: $token");

        if (token != null) {
          _voipToken = token;
          _tokenStreamController.add(token);
        }
      } else if (call.method == 'onIncomingPush') {
        try {
          final data = Map<String, dynamic>.from(call.arguments);
          showIncomingCall(data);
        } catch (e) {
          print("Error parsing VoIP push data: $e");
        }
      }
    });
  }

  // Setup CallKit Incoming Listeners
  FlutterCallkitIncoming.onEvent.listen((event) {
    if (onEvent != null && event != null) {
      onEvent(event);
    }
  });

  _isInitialized = true;
}