const fs = require('fs')
const youtubedl = require('youtube-dl')

const video = youtubedl('http://www.youtube.com/watch?v=90AiXO1pAiA',
  // Optional arguments passed to youtube-dl.
  ['--format=18'],
  // Additional options can be given for calling `child_process.execFile()`.
  { cwd: __dirname })

// Will be called when the download starts.
video.on('info', function(info) {
  console.log('Download started')
  console.log('filename: ' + info._filename)
  console.log('size: ' + info.size)
})

video.pipe(fs.createWriteStream('myvideo.mp4'))

const youtubedl = require('youtube-dl')
const fs = require('fs')
const output = 'myvideo.mp4'

let downloaded = 0

if (fs.existsSync(output)) {
  downloaded = fs.statSync(output).size
}

const video = youtubedl('https://www.youtube.com/watch?v=179MiZSibco',

  // Optional arguments passed to youtube-dl.
  ['--format=18'],

  // start will be sent as a range header
  { start: downloaded, cwd: __dirname })

// Will be called when the download starts.
video.on('info', function(info) {
  console.log('Download started')
  console.log('filename: ' + info._filename)

  // info.size will be the amount to download, add
  let total = info.size + downloaded
  console.log('size: ' + total)

  if (downloaded > 0) {
    // size will be the amount already downloaded
    console.log('resuming from: ' + downloaded)

    // display the remaining bytes to download
    console.log('remaining bytes: ' + info.size)
  }
})

video.pipe(fs.createWriteStream(output, { flags: 'a' }))

// Will be called if download was already completed and there is nothing more to download.
video.on('complete', function complete(info) {
  'use strict'
  console.log('filename: ' + info._filename + ' already downloaded.')
})

video.on('end', function() {
  console.log('finished downloading!')
})

const youtubedl = require('youtube-dl')

const url = 'http://www.youtube.com/watch?v=WKsjaOqDXgg'
// Optional arguments passed to youtube-dl.
const options = ['--username=user', '--password=hunter2']

youtubedl.getInfo(url, options, function(err, info) {
  if (err) throw err

  console.log('id:', info.id)
  console.log('title:', info.title)
  console.log('url:', info.url)
  console.log('thumbnail:', info.thumbnail)
  console.log('description:', info.description)
  console.log('filename:', info._filename)
  console.log('format id:', info.format_id)
})

const youtubedl = require('youtube-dl')

const url1 = 'http://www.youtube.com/watch?v=WKsjaOqDXgg'
const url2 = 'https://vimeo.com/6586873'

youtubedl.getInfo([url1, url2], function(err, info) {
  if (err) throw err

  console.log('title for the url1:', info[0].title)
  console.log('title for the url2:', info[1].title)
})

const youtubedl = require('youtube-dl')

const video = youtubedl('http://www.youtube.com/watch?v=90AiXO1pAiA',
  // Optional arguments passed to youtube-dl.
  ['--proxy', 'http://ip:port'],

const youtubedl = require('youtube-dl')
const url = 'https://youtu.be/PizwcirYuGY'

const options = {
  // Write automatic subtitle file (youtube only)
  auto: false,
  // Downloads all the available subtitles.
  all: false,
  // Subtitle format. YouTube generated subtitles
  // are available ttml or vtt.
  format: 'ttml',
  // Languages of subtitles to download, separated by commas.
  lang: 'en',
  // The directory to save the downloaded files in.
  cwd: __dirname,
}

youtubedl.getSubs(url, options, function(err, files) {
  if (err) throw err

  console.log('subtitle files downloaded:', files)
})

const youtubedl = require('youtube-dl')
const url = 'https://youtu.be/PizwcirYuGY'

const options = {
  // Downloads available thumbnail.
  all: false,
  // The directory to save the downloaded files in.
  cwd: __dirname,
}

youtubedl.getThumbs(url, options, function(err, files) {
  if (err) throw err

  console.log('thumbnail file downloaded:', files)
})

const path = require('path')
const fs   = require('fs')
const youtubedl = require('youtube-dl')

function playlist(url) {

  'use strict'
  const video = youtubedl(url)

  video.on('error', function error(err) {
    console.log('error 2:', err)
  })

  let size = 0
  video.on('info', function(info) {
    size = info.size
    let output = path.join(__dirname + '/', size + '.mp4')
    video.pipe(fs.createWriteStream(output))
  })

  let pos = 0
  video.on('data', function data(chunk) {
    pos += chunk.length
    // `size` should not be 0 here.
    if (size) {
      let percent = (pos / size * 100).toFixed(2)
      process.stdout.cursorTo(0)
      process.stdout.clearLine(1)
      process.stdout.write(percent + '%')
    }
  })

  video.on('next', playlist)
}

playlist('https://www.youtube.com/playlist?list=PLEFA9E9D96CB7F807')

const youtubedl = require('youtube-dl')

youtubedl.getExtractors(true, function(err, list) {
  console.log('Found ' + list.length + ' extractors')

  for (let i = 0 i < list.length i++) {
    console.log(list[i])
  }
})

const youtubedl = require('youtube-dl')

console.log(youtubedl.getYtdlBinary())

const path = require('path')
const youtubedl = require('youtube-dl')

const customBinaryPath = path.resolve('custom/path/to-binary')

youtubedl.setYtdlBinary(customBinaryPath)

const youtubedl = require('youtube-dl')

youtubedl.exec(url, ['-x', '--audio-format', 'mp3'], {}, function(err, output) {
  if (err) throw err

  console.log(output.join('\n'))
})

const downloader = require('youtube-dl/lib/downloader')

downloader('path/to-binary', function error(err, done) {
  'use strict'
  if (err) throw err

  console.log(done)
})

const downloader = require('youtube-dl/lib/downloader')

downloader('path/to-binary')
.then((message) => {
    console.log(message);
}).catch((err) => {
    console.log("err", err);
    exit(1);
});