// bot.js
// Simple WhatsApp bot using Baileys
const { default: makeWASocket, useMultiFileAuthState, DisconnectReason, fetchLatestBaileysVersion } = require('@whiskeysockets/baileys')
const qrcode = require('qrcode-terminal')
const fs = require('fs')

async function start() {
  // simpan session di folder "session"
  const { state, saveCreds } = await useMultiFileAuthState('session')

  // dapatkan versi baileys (optional) untuk kompatibilitas
  let { version, isLatest } = await fetchLatestBaileysVersion().catch(() => ({ version: [4, 0, 0], isLatest: false }))

  const sock = makeWASocket({
    auth: state,
    printQRInTerminal: false, // kita handle QR sendiri
    version
  })

  // print QR ke terminal ketika muncul
  sock.ev.on('connection.update', (update) => {
    const { connection, qr, lastDisconnect } = update
    if (qr) {
      console.log('QR CODE TERSEDIA — scan dengan WhatsApp di device lain')
      qrcode.generate(qr, { small: true })
    }
    if (connection === 'open') {
      console.log('✅ Bot WhatsApp berhasil konek!')
    }
    if (connection === 'close') {
      const reason = (lastDisconnect?.error)?.output?.statusCode || lastDisconnect?.error?.toString()
      console.log('⚠️ Koneksi tertutup:', reason)
      // reconnect logic simple:
      if (lastDisconnect?.error?.output?.statusCode !== DisconnectReason.loggedOut) {
        console.log('Mencoba reconnect dalam 5 detik...')
        setTimeout(start, 5000)
      } else {
        console.log('Session ter-logout. Hapus folder session untuk login ulang.')
      }
    }
  })

  // simpan credentials saat ada update
  sock.ev.on('creds.update', saveCreds)

  // event pesan masuk
  sock.ev.on('messages.upsert', async (m) => {
    try {
      const upsert = m
      if (!upsert.messages) return
      const msg = upsert.messages[0]
      if (!msg.message || msg.key.fromMe) return

      const from = msg.key.remoteJid
      const messageText = msg.message.conversation || msg.message?.extendedTextMessage?.text || ''

      console.log(`[Pesan] dari ${from}: ${messageText}`)

      // simple command handling
      const text = messageText?.toString().trim().toLowerCase()

      if (text === 'halo' || text === 'hi' || text === 'hai') {
        await sock.sendMessage(from, { text: 'Halo 👋, saya bot! Ketik "menu" untuk opsi.' })
      } else if (text === 'menu') {
        await sock.sendMessage(from, {
          text: '📌 Menu Bot:\n1. halo\n2. menu\n3. info\n4. ping'
        })
      } else if (text === 'info') {
        await sock.sendMessage(from, { text: '🤖 Bot sederhana menggunakan Baileys (Termux).' })
      } else if (text === 'ping') {
        const time = new Date().toLocaleString()
        await sock.sendMessage(from, { text: `Pong! waktu server: ${time}` })
      } else {
        // fallback auto-reply
        await sock.sendMessage(from, { text: 'Maaf, aku tidak mengerti. Ketik "menu".' })
      }
    } catch (e) {
      console.error('Error handling message', e)
    }
  })
}

start().catch(err => console.error('Start failed:', err))