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

const client = new Client({
    authStrategy: new LocalAuth(),
    puppeteer: { headless: true }
});

client.on('qr', (qr) => console.log('Scan QR:', qr));
client.on('ready', () => console.log('Client ready'));
client.on('message', async (msg) => {
    if (msg.body === 'ping') await msg.reply('pong');
});

client.initialize();  // Non-blocking - listen for 'ready' event

// No persistence - QR scan every restart
new NoAuth()

// Local filesystem - recommended for single-instance bots
new LocalAuth({ clientId: 'bot1' })

// Remote store - for cloud/multi-instance deployments
new RemoteAuth({ store: myStore, clientId: 'bot1', backupSyncIntervalMs: 60000 })

const client = new Client({
    authStrategy: new LocalAuth(),
    pairWithPhoneNumber: {
        phoneNumber: '5511999999999',  // country code + number, no symbols
        showNotification: true,
        intervalMs: 180000
    }
});
client.on('code', (code) => console.log('Pairing code:', code));

// Text message
await client.sendMessage('5511999999999@c.us', 'Hello!');

// Reply to received message
await msg.reply('Got it!');

// With mentions
await client.sendMessage(chatId, 'Hi @5511999999999', {
    mentions: ['5511999999999@c.us']
});

// Quote specific message
await client.sendMessage(chatId, 'Replying to this', {
    quotedMessageId: msg.id._serialized
});

const { MessageMedia } = require('whatsapp-web.js');

// From file
const media = MessageMedia.fromFilePath('/path/to/image.png');
await client.sendMessage(chatId, media, { caption: 'Check this out' });

// From URL
const media = await MessageMedia.fromUrl('https://example.com/image.png');
await client.sendMessage(chatId, media);

// Download received media
if (msg.hasMedia) {
    const media = await msg.downloadMedia();
    // Access: media.mimetype, media.data (base64), media.filename
}

// As sticker (requires ffmpeg)
await client.sendMessage(chatId, media, { sendMediaAsSticker: true });

// As voice note
await client.sendMessage(chatId, audio, { sendAudioAsVoice: true });

// As HD quality
await client.sendMessage(chatId, media, { sendMediaAsHd: true });

// As view-once
await client.sendMessage(chatId, media, { isViewOnce: true });

// As document
await client.sendMessage(chatId, media, { sendMediaAsDocument: true });

const { Poll, Location } = require('whatsapp-web.js');

// Poll (single choice)
await client.sendMessage(chatId, new Poll('Question?', ['A', 'B']));

// Poll (multiple choice)
await client.sendMessage(chatId, new Poll('Pick', ['A', 'B', 'C'], 
    { allowMultipleAnswers: true }));

// React to message
await msg.react('👍');   // add reaction
await msg.react('');      // remove reaction

// Send location
await client.sendMessage(chatId, 
    new Location(37.422, -122.084, { name: 'Googleplex' }));

// Edit sent message
const sent = await client.sendMessage(chatId, 'Original');
await sent.edit('Edited text');

// Delete message
await sent.delete(true);  // true = delete for everyone

// Pin message
await msg.pin(86400);     // Pin for 24h (86400|604800|2592000 seconds)
await msg.unpin();