import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:logger/logger.dart';

class FirebaseNotificationService {
  final FirebaseMessaging _firebaseMessaging = FirebaseMessaging.instance;
  final Logger _logger = Logger();

  Future<void> initialize() async {
    await Firebase.initializeApp();
    _logger.i('Firebase initialized.');

    NotificationSettings settings = await _firebaseMessaging.requestPermission();
    _logger.i('FCM permission status: ${settings.authorizationStatus}');

    // Foreground messages
    FirebaseMessaging.onMessage.listen((RemoteMessage message) {
      _logger.i('🔔 Foreground Notification Received');
      _logNotificationDetails(message);
    });

    // When app is opened from background via notification
    FirebaseMessaging.onMessageOpenedApp.listen((RemoteMessage message) {
      _logger.i('📲 App opened via notification');
      _handleNotificationTap(message);
    });

    // Background handler registration
    FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);
  }

  void _handleNotificationTap(RemoteMessage message) {
    _logger.i('Notification tapped with data: ${message.data}');
  }

  void _logNotificationDetails(RemoteMessage message) {
    _logger.i('Notification ID: ${message.messageId}');
    _logger.i('Title: ${message.notification?.title}');
    _logger.i('Body: ${message.notification?.body}');
    _logger.i('Data: ${message.data}');
  }
}

// Background handler
Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  await Firebase.initializeApp();
  final Logger _logger = Logger();
  _logger.i('🕓 Handling background notification...');
  _logger.i('Notification ID: ${message.messageId}');
  _logger.i('Title: ${message.notification?.title}');
  _logger.i('Body: ${message.notification?.body}');
  _logger.i('Data: ${message.data}');
}