const exec = require('child_process').exec
const command = 'youtube-dl'
const cmdOpts = ['--id', '-x', '--audio-format', 'mp3']
const config = require('@config/index.js')
const cwd = config.download_location

/**
 * download youtube video
 * @param {string} url
 * @return {boolean}
 */
module.exports.download = async (url = '') => {
  if (typeof url !== 'string' || url.trim().length === 0) return false

  const result = await new Promise(resolve => {
    exec(`${command} ${cmdOpts.join(' ')} "${url}"`, { cwd }, (err, sout, serr) => {
      if (err) return resolve(false)
      return resolve(true)
    })
  })

  return result
}

/**
 * get youtube video title
 * @param {string} url
 * @return {string}
 */
module.exports.getTitle = async (url = '') => {
  if (typeof url !== 'string' || url.trim().length === 0) return ''

  const result = await new Promise(resolve => {
    exec(`${command} -e "${url}"`, { cwd }, (err, sout, serr) => {
      if (err) return resolve('')
      resolve(sout)
    })
  })
  return result
}