الإشعارات الفورية والتنبيهات (Firebase Cloud Messaging - FCM)

// public/firebase-messaging-sw.js
importScripts('https://www.gstatic.com/firebasejs/10.0.0/firebase-app-compat.js');
importScripts('https://www.gstatic.com/firebasejs/10.0.0/firebase-messaging-compat.js');

firebase.initializeApp({
  apiKey: "YOUR_API_KEY",
  projectId: "your-app",
  messagingSenderId: "123456789",
  appId: "1:123:web:abc"
});

const messaging = firebase.messaging();

// استقبال الإشعارات في الخلفية
messaging.onBackgroundMessage((payload) => {
  console.log('[SW] إشعار في الخلفية:', payload);

  const notificationTitle = payload.notification?.title || "إشعار جديد";
  const notificationOptions = {
    body: payload.notification?.body,
    icon: '/icon-192.png',
    data: payload.data
  };

  self.registration.showNotification(notificationTitle, notificationOptions);
});

// معالجة النقر على الإشعار
self.addEventListener('notificationclick', (event) => {
  event.notification.close();
  event.waitUntil(clients.openWindow('/'));
});

// functions/index.js
import { onDocumentCreated } from "firebase-functions/v2/firestore";
import { getMessaging } from "firebase-admin/messaging";
import { initializeApp } from "firebase-admin/app";

initializeApp();

export const sendChatNotification = onDocumentCreated(
  "messages/{messageId}",
  async (event) => {
    const message = event.data.data();
    const recipientToken = message.recipientFCMToken;

    if (!recipientToken) return;

    try {
      await getMessaging().send({
        token: recipientToken,
        notification: {
          title: "رسالة جديدة",
          body: message.content
        },
        data: {
          type: "chat",
          roomId: message.roomId
        }
      });
      console.log("✓ تم إرسال الإشعار");
    } catch (error) {
      console.error("خطأ:", error);
    }
  }
);