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

const app = express();
app.use(express.json());

// WhatsApp client
const client = new Client({
    authStrategy: new LocalAuth(),
    puppeteer: {
        headless: true,
        args: ['--no-sandbox', '--disable-setuid-sandbox']
    }
});

// Show QR in terminal
client.on('qr', (qr) => {
    console.log('Scan this QR code:');
    qrcode.generate(qr, { small: true });
});

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


// 4️⃣ ✅ MESSAGE LISTENER (PUT IT HERE)
client.on('message', async (message) => {
    console.log('--- New Message ---');
    console.log('From:', message.from); // chat ID
    console.log('Body:', message.body);
    console.log('Is Group:', message.from.endsWith('@g.us'));

    // Example: auto-reply
    if (message.body.toLowerCase() === 'ping') {
        await message.reply('pong');
    }
});

// Initialize WhatsApp
client.initialize();


/**
 * POST /send
 * {
 *   "number": "62822932xxxx",
 *   "message": "hello"
 * }
 */
app.get('/send', async (req, res) => {
    //const { number, message } = req.body;

    let number= "6281336138742";
    let message ="hello ini dia";    
    const chatId = number + '@c.us';

    try {
        await client.sendMessage(chatId, message);
        return res.json({
            success: true,
            to: number,
            message
        });
    } catch (err) {
        console.error(err);
        return res.status(500).json({
            success: false,
            error: 'Failed to send message'
        });
    }
});

// Start Express server
const PORT = 3019;
app.listen(PORT, () => {
    console.log(`Express server running on http://localhost:${PORT}`);
});