const WebSocket = require('ws')
const config = require('../config')
const dbPool = require('./database')
const request = require('request')
const log = require('debug')('BOT:IRC')
const { msgSplit } = require('./twitchParser')

const ws = new WebSocket(`wss://${config.twitch.chat_host}:443`, 'irc')

ws.on('open', handleOpen)

ws.on('message', handleMessage)

ws.on('error', (err) => {
  console.error(err)
})

ws.on('close', (code, reason) => {
  console.log('exit', code, reason)
})

function handleMessage (data) {
  let d = data.toString()
  let darr = d.split(/\n/).filter(t => t).map(t => t.replace(/\r$/, ''))

  for (let i in darr) {
    log(darr[i])
    msgSplit(ws, darr[i]).then(() => { })
  }
}

async function handleOpen () {
  let db = await dbPool.connect()

  let body = null
  try {
    let options = {
      method: 'POST',
      url: config.twitch.token_url,
      headers: {
        'Content-Type': 'application/x-www-form-urlencoded',
        'Accept': 'application/json'
      },
      form: {
        grant_type: 'refresh_token',
        refresh_token: config.twitch.refresh_token,
        client_id: config.twitch.client_id,
        client_secret: config.twitch.secret
      }
    }
    body = await new Promise((resolve, reject) => {
      request(options, function (error, response, body) {
        if (error) {
          reject(error)
          return
        }
        if (typeof body === 'string') body = JSON.parse(body)
        resolve(body)
      })
    })
  } catch (err) {
    console.log(err)
  }
  
  if (body === null || !('access_token' in body)) throw new Error('access token not found')

  ws.send('PASS oauth:' + body.access_token)
  ws.send('NICK mtfosbot')
  ws.send('CAP REQ :twitch.tv/membership :twitch.tv/commands')

  let query = `select "name", "join" from "public"."channels" where "join" = $1`
  let param = [true]
  let result = await db.query(query, param)
  await db.end()
  if (result !== null && result.rows.length > 0) {
    for (let row of result.rows) {
      if ('name' in row) {
        ws.send('JOIN #' + row.name)
      }
    }
  }
}

module.exports = ws