pharmacy/lib/PushNotificationService.dart

import 'dart:convert';

import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:healthcare_pharmacy/settings.dart';
import 'package:shared_preferences/shared_preferences.dart';


class PushNotificationService {
  final FirebaseMessaging _fcm = FirebaseMessaging.instance;
  final FlutterLocalNotificationsPlugin _flutterLocalNotificationsPlugin =
  FlutterLocalNotificationsPlugin();


  // Constructor to initialize the FCM token
  PushNotificationService() {
    _initFCMToken();
  }

  Future<void> _initFCMToken() async {
    // Get the stored FCM token
    AppSettings.fcmId = await _getStoredFCMToken();

    // If FCM token is not available, request a new one
    if (AppSettings.fcmId.isEmpty) {
      await _fcm.getToken().then((token) {
        print('FCM Token: $token');
        // Store the FCM token directly in AppSettings
        AppSettings.fcmId = token!;
        _storeFCMToken(token);
      });
    }
  }

  Future<void> _storeFCMToken(String token) async {
    // Store the FCM token using SharedPreferences
    SharedPreferences prefs = await SharedPreferences.getInstance();
    await prefs.setString('fcmToken', token);
  }

  Future<String> _getStoredFCMToken() async {
    // Retrieve the stored FCM token from SharedPreferences
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return prefs.getString('fcmToken') ?? '';
  }
  Future<void> initialize() async {
    // Request permission for user notifications
    await _fcm.requestPermission();

    // Get the FCM token and handle incoming messages while the app is in the foreground
    _fcm.getToken().then((token) {
      print('FCM Token: $token');
      // Do something with the token (e.g., send it to your server)
    });



    // Listen to incoming messages while the app is in the foreground
    FirebaseMessaging.onMessage.listen((RemoteMessage message) {
      print("data::::$message");
      // var payload = message.data.toString();
      // // Handle the incoming message
      // Map<String, dynamic> notificationPayload = jsonDecode(payload);
      // Access the extra data using the keys
      var payload=message.data;
      var extramessage;
      if(payload.isNotEmpty){
        extramessage = message.data['extraKey1'];
        String? extraValue2 = message.data['extraKey2'];

      }

      // Show a local notification with the received message
      _showNotification(message.notification?.title, message.notification?.body,extramessage);
    });

    // Handle messages when the app is in the background or terminated
    FirebaseMessaging.onMessageOpenedApp.listen((RemoteMessage message) {
      var payload = message.data.toString();
      if (payload != null) {
        // Parse the JSON payload
        Map<String, dynamic> notificationPayload = jsonDecode(payload);
        // Access the extra data using the keys
        String? extraValue1 = notificationPayload['extraKey1'];
        String? extraValue2 = notificationPayload['extraKey2'];
        // Do something with the extra data, e.g., display it in a dialog or use it in your app logic.
      }

      // Show a local notification with the received message
      //  _showNotification(message.notification?.title, message.notification?.body);
    });
  }

  // Method to show a local notification using flutter_local_notifications
  Future<void> _showNotification(String? title, String? body,String extramessage) async {
    const AndroidNotificationDetails androidPlatformChannelSpecifics =
    AndroidNotificationDetails(
        'healthpharma', // Replace with your channel ID
        'healthpharmanotifications', // Replace with your channel name
        importance: Importance.high,
        priority: Priority.high,
        showWhen: false,
        icon: "logo"

    );

    const NotificationDetails platformChannelSpecifics =
    NotificationDetails(android: androidPlatformChannelSpecifics);
    Map<String, dynamic> notificationPayload = {
      "body": body,
      "title": title,
      "extraKey1": extramessage,
      "extraKey2": "Extra Value 2",
      // Add more key-value pairs as needed
    };
    await _flutterLocalNotificationsPlugin.show(
      0, // notification ID (can be any unique ID)
      title, // notification title
      body, // notification body
      platformChannelSpecifics,
      payload: jsonEncode(notificationPayload), // optional, you can pass data or identifier related to the notification
    );
  }
}