FCM & APNs ARCHITECTURE

const admin = require('firebase-admin');

// 1. Initialize Firebase Admin with Service Account
admin.initializeApp({
  credential: admin.credential.cert(serviceAccountKey)
});

// 2. Dispatch High-Priority Push to a Specific Device Token
async function sendTargetedPush(deviceToken, title, body, payloadData = {}) {
  const message = {
    token: deviceToken,
    notification: {
      title: title,
      body: body
    },
    data: payloadData,
    android: {
      priority: 'high',
      notification: {
        sound: 'default',
        channelId: 'technocons_high_priority'
      }
    },
    apns: {
      payload: {
        aps: {
          sound: 'default',
          badge: 1,
          'content-available': 1
        }
      }
    }
  };

  const response = await admin.messaging().send(message);
  console.log('Successfully dispatched message ID:', response);
}