import Twitter from 'twitter-lite'
import sleep from 'sleep'
import chalk from 'chalk'

const options = {
  consumer_key: process.env.CONSUMER_KEY,
  consumer_secret: process.env.CONSUMER_SECRET,
  access_token_key: process.env.ACCESS_TOKEN_KEY,
  access_token_secret: process.env.ACCESS_TOKEN_SECRET
}

const client = new Twitter(options)

export const promiser = (promise, improved) => promise
  .then((data) => [null, data])
  .catch((err) => {
    if (improved) {
      Object.assign(err, improved)
    }

    return [err] // which is same as [err, undefined];
  })

const handleError = e => {
  if ('errors' in e) {
    if (e.errors[0].code === 88) {
      console.log('Rate limit will reset on', new Date(e._headers.get('x-rate-limit-reset') * 1000))
    } else {
      console.log('API Related Error...')
      console.log(e.errors)
    }
  } else {
    console.log('non-API Error')
    console.log(e)
  }
}

const unlike = async tweet => {
  let next = 1
  let remaining = 0
  const [e, res] = await promiser(client.post('favorites/destroy', {
    id: tweet.id_str
  }))
  if (e) {
    console.log(chalk.red(`❌ - https://www.twitter.com/${tweet.user.screen_name}/status/${tweet.id_str}`))
    handleError(e)
    return
  }
  const headers = res._headers
  remaining = parseInt(headers.get('x-rate-limit-remaining'))
  if (!isNaN(remaining) && remaining === 0) {
    console.log(chalk.cyan('Waiting'))
    next = parseInt(headers.get('x-rate-limit-reset')) - Date.now()
    next = next / 1000
  }
  console.log(chalk.green(`✅ - https://www.twitter.com/${res.user.screen_name}/status/${res.id_str}`))
  return next
}

const fetchLikes = async () => {
  const favs = await client.get('favorites/list', {
    count: 200
  })
  console.log(`${favs.length} favs found...`)
  return favs
}

const handleUnlikes = async favs => {
  for (let i = 0, len = favs.length; i < len; i++) {
    const next = await unlike(favs[i])
    console.log(chalk.green(`Sleeping for ${next}s...`))
    sleep.sleep(next)
  }

  return true
}

;(async () => {
  let favs = await fetchLikes()
  while (favs && favs.length > 0) {
    await handleUnlikes(favs)
    favs = await fetchLikes()
  }
  console.log('Eskeler!!!')
})()