const { Client, LocalAuth } = require('whatsapp-web.js');
const qrcode = require('qrcode-terminal');
const express = require('express');
const bodyParser = require('body-parser');

const app = express();
const port = 3000;

// Middleware untuk meng-parse JSON request body
app.use(bodyParser.json());

// Inisialisasi client WhatsApp
const client = new Client({
  authStrategy: new LocalAuth(),
});

// Menampilkan QR Code saat pertama kali login
client.on('qr', (qr) => {
  qrcode.generate(qr, { small: true });
});

// Setelah terhubung
client.on('ready', () => {
  console.log('WhatsApp Web is ready');
});

// Service untuk mengirim pesan
app.post('/send-message', (req, res) => {
  const { phone, message } = req.body;

  if (!phone || !message) {
    return res.status(400).send('Phone number and message are required!');
  }

  // Mengirim pesan
  client.sendMessage(`${phone}@c.us`, message)
    .then((response) => {
      res.status(200).send('Message sent successfully!');
    })
    .catch((error) => {
      console.error(error);
      res.status(500).send('Failed to send message');
    });
});

// Jalankan server
app.listen(port, () => {
  console.log(`WhatsApp API service running on http://localhost:${port}`);
});

// Log in to WhatsApp Web
client.initialize();