// lib/services/push_service.dart
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';

class PushService {
  final _fcm = FirebaseMessaging.instance;
  final _local = FlutterLocalNotificationsPlugin();
  final _channelId = 'ride_updates';

  Future<void> init() async {
    // 1) Request permissions
    await _fcm.requestPermission();
    // 2) Create Android notification channel
    const androidChannel = AndroidNotificationChannel(
        'ride_updates', 'Ride Updates',
        importance: Importance.max);
    await _local
        .resolvePlatformSpecificImplementation<
            AndroidFlutterLocalNotificationsPlugin>()
        ?.createNotificationChannel(androidChannel);
    // 3) Initialize plugin
    await _local.initialize(
      const InitializationSettings(
        android: AndroidInitializationSettings('@mipmap/ic_launcher'),
        iOS: DarwinInitializationSettings(),
      ),
    );
    // 4) Listen to FCM
    FirebaseMessaging.onMessage.listen(_showLocalNotification);
    FirebaseMessaging.onBackgroundMessage(_backgroundHandler);
  }

  Future<void> _showLocalNotification(RemoteMessage msg) async {
    final title = msg.data['title'] ?? 'Ride Update';
    final body = msg.data['body'] ?? '';
    await _local.show(
      msg.hashCode,
      title,
      body,
      NotificationDetails(
        android: AndroidNotificationDetails(
          _channelId,
          'Ride Updates',
          icon: '@mipmap/ic_launcher',
        ),
      ),
      payload: msg.data['rideId'],
    );
  }

  static Future<void> _backgroundHandler(RemoteMessage msg) async {
    await PushService().init();
    await PushService()._showLocalNotification(msg);
  }

  Future<void> showLocalNotification({
    required String title,
    required String body,
    String? payload,
  }) =>
      _local.show(
        body.hashCode,
        title,
        body,
        NotificationDetails(
          android: AndroidNotificationDetails(
            _channelId,
            'Ride Updates',
            icon: '@mipmap/ic_launcher',
          ),
        ),
        payload: payload,
      );
}