// index.js
const {
  default: makeWASocket,
  useMultiFileAuthState,
  DisconnectReason,
  fetchLatestBaileysVersion,
  proto,
  generateWAMessageFromContent
} = require('@fizzxydev/baileys-pro')
const express = require('express')
const { Boom } = require('@hapi/boom')
const qrcode = require('qrcode')
const path = require('path')
const fs = require('fs')
const axios = require('axios')

const app = express()
app.use(express.json())
app.use(express.static('public'))

let sock
let qrData = null
let isConnected = false

// Dictionnaire des URLs PDF
const PDF_LINKS = {
  prop: 'https://merlo-ch.com/uploads/proposition/f_p_250505_0000136_00008_EB00001909.pdf',
  spec: 'https://merlo-ch.com/uploads/proposition/d_p_250505_0000136_00008_EB00001909.pdf'
}

const initBaileys = async () => {
  const { version } = await fetchLatestBaileysVersion()
  const { state, saveCreds } = await useMultiFileAuthState('auth')

  sock = makeWASocket({
    version,
    auth: state,
    printQRInTerminal: false
  })

  sock.ev.on('connection.update', async update => {
    const { connection, lastDisconnect, qr } = update
  
    if (qr) {
      try {
        qrData = await qrcode.toDataURL(qr)
        isConnected = false
      } catch (e) {
        console.error('❌ Erreur génération QR :', e)
      }
    }
  
    if (connection === 'close') {
      const shouldReconnect = lastDisconnect?.error?.output?.statusCode !== DisconnectReason.loggedOut
      console.log(shouldReconnect ? '🔁 Reconnexion...' : '❌ Déconnecté.')
      if (shouldReconnect) initBaileys()
    } else if (connection === 'open') {
      console.log('✅ Connecté à WhatsApp')
      isConnected = true
    }
  })
  

  sock.ev.on('creds.update', saveCreds)

  // Gestion du clic sur les boutons pour envoyer le PDF
  sock.ev.on('messages.upsert', async ({ messages }) => {
    const msg = messages[0]
    if (!msg.key.fromMe && msg.message?.buttonsResponseMessage) {
      const btnId = msg.message.buttonsResponseMessage.selectedButtonId
      const pdfUrl = PDF_LINKS[btnId]
      if (!pdfUrl) return

      try {
        const resp = await axios.get(pdfUrl, { responseType: 'arraybuffer' })
        const pdfBuffer = Buffer.from(resp.data)

        await sock.sendMessage(msg.key.remoteJid, {
          document: pdfBuffer,
          fileName: btnId === 'prop' ? 'Proposition.pdf' : 'Spec_machine.pdf',
          mimetype: 'application/pdf'
        })
      } catch (e) {
        console.error('❌ Erreur envoi PDF :', e)
      }
    }
  })
}

initBaileys().catch(console.error)

// Affichage du QR code pour login
app.get('/login', (req, res) => {
  res.sendFile(path.join(__dirname, 'public', 'login.html'))
})

app.get('/api/qrcode', (req, res) => {
  res.json({ qr: qrData, connected: isConnected })
})

// Envoi d'un simple texte
app.post('/sendText', async (req, res) => {
  const { phone, message } = req.body
  if (!sock || !isConnected) return res.status(400).json({ error: 'Non connecté' })
  try {
    await sock.sendMessage(`${phone}@s.whatsapp.net`, { text: message })
    res.json({ success: true })
  } catch (e) {
    res.status(500).json({ error: e.message })
  }
})

// Envoi de boutons sans image
app.post('/sendButtons', async (req, res) => {
  const { phone } = req.body
  if (!sock || !isConnected) return res.status(400).json({ error: 'Non connecté' })

  try {
    const content = {
      message: {
        interactiveMessage: proto.Message.InteractiveMessage.create({
          header: proto.Message.InteractiveMessage.Header.create({
            title: "Menu principal",
            hasMediaAttachment: false
          }),
          body: proto.Message.InteractiveMessage.Body.create({
            text: "Bienvenue sur notre service !"
          }),
          footer: proto.Message.InteractiveMessage.Footer.create({
            text: "Choisis une action ci-dessous"
          }),
          nativeFlowMessage: proto.Message.InteractiveMessage.NativeFlowMessage.create({
            buttons: [
              {
                name: "cta_reply",
                buttonParamsJson: JSON.stringify({
                  display_text: "📩 Contacter support",
                  id: "support_action"
                })
              },
              {
                name: "cta_url",
                buttonParamsJson: JSON.stringify({
                  display_text: "🌐 Voir notre site",
                  url: "https://canguidev.fr",
                  merchant_url: "https://canguidev.fr"
                })
              },
              {
                name: "cta_call",
                buttonParamsJson: JSON.stringify({
                  display_text: "📞 Appeler le support",
                  id: "+33612345678"
                })
              }
            ]
          })
        })
      }
    }

    const msg = generateWAMessageFromContent(
      `${phone}@s.whatsapp.net`,
      content,
      {}
    )
    await sock.relayMessage(
      msg.key.remoteJid,
      msg.message,
      { messageId: msg.key.id }
    )

    res.json({ success: true })
  } catch (e) {
    console.error('❌ Erreur sendButtons :', e)
    res.status(500).json({ error: e.message })
  }
})

// Envoi de l'image interactive avec CTA URL
app.post('/sendInteractiveImage', async (req, res) => {
  const {
    phone,
    caption = 'Description par défaut',
    title = 'Titre par défaut',
    footer = 'Pied de page',
    propositionUrl,
    specUrl
  } = req.body

  if (!sock || !isConnected) {
    return res.status(400).json({ error: 'Non connecté' })
  }

  try {
    const jid = `${phone}@s.whatsapp.net`
    const imagePath = path.join(__dirname, 'public', 'logo-merlo-cs-FR.jpg')
    const imgBuffer = fs.readFileSync(imagePath)

    // Construction du native interactive message
    const interactiveContent = proto.Message.InteractiveMessage.create({
      header: proto.Message.InteractiveMessage.Header.create({
        title,
        hasMediaAttachment: true
      }),
      body: proto.Message.InteractiveMessage.Body.create({
        text: caption
      }),
      footer: proto.Message.InteractiveMessage.Footer.create({
        text: footer
      }),
      nativeFlowMessage: proto.Message.InteractiveMessage.NativeFlowMessage.create({
        buttons: [
          {
            name: 'prop',
            buttonParamsJson: JSON.stringify({
              display_text: 'Proposition',
              url: propositionUrl,
              merchant_url: propositionUrl
            })
          },
          {
            name: 'spec',
            buttonParamsJson: JSON.stringify({
              display_text: 'Spec machine',
              url: specUrl,
              merchant_url: specUrl
            })
          }
        ]
      })
    })

    // On emballe l’image en tant que miniature (viewOnce)
    const messageContent = {
      viewOnceMessage: {
        message: {
          messageContextInfo: {
            deviceListMetadata: {},
            deviceListMetadataVersion: 2
          },
          viewOnceMessage: {
            message: {
              imageMessage: {
                mimetype: 'image/jpeg',
                jpegThumbnail: imgBuffer
              }
            }
          },
          interactiveMessage: interactiveContent
        }
      }
    }

    const waMsg = generateWAMessageFromContent(jid, messageContent, {})
    await sock.relayMessage(
      waMsg.key.remoteJid,
      waMsg.message,
      { messageId: waMsg.key.id }
    )

    res.json({ success: true })
  } catch (err) {
    console.error('❌ Erreur sendInteractiveImage:', err)
    res.status(500).json({ error: err.message })
  }
})

const PORT = process.env.PORT || 3001
app.listen(PORT, () => {
  console.log(`🚀 Serveur Baileys démarré sur http://localhost:${PORT}`)
})