(function () {
  var table = document.getElementById('ttable')
  var input = document.getElementById('search')
  var audio = document.getElementById('player')
  var playing = document.getElementById('playing')

  var tableHead = '<tr> \
    <th class="small">#</th> \
    <th>Track</th> \
    <th>Artist</th> \
    <th>Album</th> \
    <th class="small">Year</th> \
    <th class="small">Duration</th> \
  </tr>'
  var nowPlaying = 0

  var pageNum = 0
  var pages = 1
  var paginator = document.querySelector('.pages')
  var pageNumText = document.querySelector('.pages #pagenum')

  window.mobilecheck = function() {
    var check = false;
    (function(a){if(/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0,4))) check = true;})(navigator.userAgent||navigator.vendor||window.opera);
    return check;
  };

  // Seconds into HH:MM:SS
  function toHHMMSS (numbr) {
    let secNum = parseInt(numbr, 10) // don't forget the second param
    let hours = Math.floor(secNum / 3600)
    let minutes = Math.floor((secNum - (hours * 3600)) / 60)
    let seconds = secNum - (hours * 3600) - (minutes * 60)

    if (hours < 10) hours = '0' + hours
    if (minutes < 10) minutes = '0' + minutes
    if (seconds < 10) seconds = '0' + seconds

    let time = ''
    if (parseInt(hours) > 0) {
      time = hours + ':' + minutes + ':' + seconds
    } else {
      time = minutes + ':' + seconds
    }
    return time
  }

  function httpGet (url, callback) {
    return new Promise(function (resolve, reject) {
      var xmlHttp = new XMLHttpRequest()
      xmlHttp.onreadystatechange = function () {
        if (xmlHttp.readyState === 4 && xmlHttp.status === 200) {
          resolve(JSON.parse(xmlHttp.responseText))
        } else if (xmlHttp.readyState === 4) {
          reject(new Error(xmlHttp.status))
        }
      }
      xmlHttp.open('GET', url, true)
      xmlHttp.send(null)
    })
  }

  function shortTitle (title, artist) {
    if (!artist) return title
    return artist + ' - ' + title
  }

  function constructList (tracks) {
    table.innerHTML = tableHead
    for (let i in tracks) {
      let track = tracks[i]
      let title = window.mobilecheck() ? shortTitle(track.title, track.artist) : track.title
      let htmlAdder = '<tr class="track">'
      htmlAdder += '<td>' + track.id + '</td>'
      htmlAdder += '<td>' + title + '</td>'
      htmlAdder += '<td>' + (track.artist || '') + '</td>'
      htmlAdder += '<td>' + (track.album || '') + '</td>'
      htmlAdder += '<td>' + (track.year || '') + '</td>'
      htmlAdder += '<td>' + toHHMMSS(track.duration) + '</td>'
      htmlAdder += '</tr>'
      table.innerHTML += htmlAdder
    }

    let trid = document.querySelectorAll('table .track')
    for (let e in trid) {
      let trelem = trid[e]
      if (!(trelem instanceof Element)) continue
      let tride = trelem.querySelector('td')
      let id = parseInt(tride.innerHTML)

      trelem.addEventListener('click', function (e) {
        play(id)
      }, false)
    }
  }

  function updatePaging () {
    if (input.value.trim() === '') {
      paginator.style.display = 'flex'
    } else {
      paginator.style.display = 'none'
      return
    }

    pageNumText.innerHTML = pageNum + ' / ' + pages
  }

  function showTracks (page) {
    if (page > pages) return
    if (page < 1) return

    httpGet('/api/tracks?page=' + page).then(function (data) {
      pageNum = page
      pages = data.pageCount
      constructList(data.tracks)
      updatePaging()
    })
  }

  function search (query) {
    updatePaging()

    if (query.trim() === '') {
      return showTracks(pageNum)
    }

    httpGet('/api/tracks/search?string=' + query).then(function (data) {
      constructList(data)
    })
  }

  function play (id) {
    if (id < 1) return
    httpGet('/api/track/' + id).then(function (data) {
      let title = shortTitle(data.title, data.artist)
      playing.innerHTML = title
      document.title = title

      audio.src = '/api/serve/by-id/' + id
      audio.play()

      nowPlaying = id
    }, function (e) {
      console.log(e)
    })
  }

  input.addEventListener('keyup', function (e) {
    e.which === 13 && search(input.value)
  }, false)

  audio.addEventListener('ended', function (e) {
    play(nowPlaying + 1)
  })

  document.getElementById('player-next').addEventListener('click', function (e) {
    play(nowPlaying + 1)
  })

  document.getElementById('player-prev').addEventListener('click', function (e) {
    play(nowPlaying - 1)
  })

  document.getElementById('jump-first').addEventListener('click', function (e) {
    showTracks(1)
  }, false)

  document.getElementById('jump-prev').addEventListener('click', function (e) {
    showTracks(pageNum - 1)
  }, false)

  document.getElementById('jump-next').addEventListener('click', function (e) {
    showTracks(pageNum + 1)
  }, false)

  document.getElementById('jump-last').addEventListener('click', function (e) {
    showTracks(pages)
  }, false)

  function handleHash (hash) {
    if (hash.indexOf('#') === 0) hash = hash.substr(1)
    if (hash.length === 0) return

    window.location.hash = ''

    if (hash.indexOf('track-') === 0) {
      let trackNr = parseInt(hash.substr(6))
      if (!isNaN(trackNr)) return play(trackNr)
    }
  }

  window.addEventListener('hashchange', function (e) {
    e.preventDefault()
    handleHash(window.location.hash)
  }, false)

  showTracks(1)
  handleHash(window.location.hash)
})()