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

app.use(express.json());

let lastQr = "";
let isReady = false;

const client = new Client({
    authStrategy: new LocalAuth({ dataPath: '/data/auth' }),
    puppeteer: {
        executablePath: '/usr/bin/chromium-browser',
        args: [
            '--no-sandbox', 
            '--disable-setuid-sandbox',
            '--disable-dev-shm-usage',
            '--disable-gpu'
        ]
    }
});

client.on('qr', (qr) => {
    lastQr = qr;
    console.log('Neuer QR Code generiert.');
});

client.on('ready', () => {
    isReady = true;
    lastQr = "";
    console.log('WhatsApp ist bereit!');
});

// Web UI für Ingress
app.get('/', async (req, res) => {
    if (isReady) {
        res.send('<div style="text-align:center;font-family:sans-serif;"><h1>WhatsApp verbunden! ✅</h1><p>Du kannst dieses Fenster jetzt schließen.</p></div>');
    } else if (lastQr) {
        const qrImage = await qrcode.toDataURL(lastQr);
        res.send(`<div style="text-align:center;font-family:sans-serif;"><h1>WhatsApp Login</h1><p>Scanne den Code mit deinem Handy:</p><img src="${qrImage}"></div>`);
    } else {
        res.send('<div style="text-align:center;font-family:sans-serif;"><h1>Warte auf QR-Code...</h1><p>Bitte Seite in 10 Sekunden neu laden.</p></div>');
    }
});

app.post('/send', async (req, res) => {
    const { number, message } = req.body;
    if (!isReady) return res.status(503).json({ error: 'Client nicht bereit' });

    try {
        const chatId = number.includes('@c.us') ? number : `${number}@c.us`;
        await client.sendMessage(chatId, message);
        res.json({ success: true });
    } catch (err) {
        res.status(500).json({ error: err.message });
    }
});

client.initialize();
app.listen(3000, () => console.log('Add-on Server läuft auf Port 3000'));