(function(context,$) {

  "use strict";
  context.JK = context.JK || {};
  context.JK.OpenJamTrackDialog = function(app) {
    var logger = context.JK.logger;
    var rest = context.JK.Rest();
    var showing = false;
    var perPage = 10;
    var $dialog = null;
    var $tbody = null;
    var $paginatorHolder = null;
    var $templateOpenJamTrackRow = null;
    var $downloadedTrackHelp = null;
    var $whatAreJamTracks = null;
    var sampleRate = null;
    var sampleRateForFilename = null;


    function emptyList() {
      $tbody.empty();
    }

    function resetPagination() {
      $dialog.find('.paginator').remove();
    }

    function beforeShow() {

    }

    function afterShow() {
      $dialog.data('result', null)
      emptyList();
      resetPagination();
      showing = true;
      sampleRate = context.jamClient.GetSampleRate()
      sampleRateForFilename = sampleRate == 48 ? '48' : '44';

      getPurchasedJamTracks(0)
        .done(function(data, textStatus, jqXHR) {
          // initialize pagination
          var $paginator = context.JK.Paginator.create(parseInt(jqXHR.getResponseHeader('total-entries')), perPage, 0, onPageSelected)
          $paginatorHolder.append($paginator);
        });

    }
    function afterHide() {
      showing = false;
    }


    function onPageSelected(targetPage) {
      return getPurchasedJamTracks(targetPage);
    }

    function getPurchasedJamTracks(page) {
      return rest.getPurchasedJamTracks({page:page + 1, per_page:10})
        .done(function(purchasedJamTracks) {

          emptyList();

          $.each(purchasedJamTracks.jamtracks, function(index, jamTrack) {

            var options = {}
            options.jamTrackState = null;
            options.jamTrackId = jamTrack.id;
            options.name = jamTrack.name;
            options.artist = jamTrack.original_artist;
            var detail  = context.jamClient.JamTrackGetTrackDetail(jamTrack.id + '-' + sampleRateForFilename) || {}
            options.downloaded = detail.key_state == 'ready' ? 'Yes' : 'No'

            var $tr = $(context._.template($templateOpenJamTrackRow.html(), options, { variable: 'data' }));
            $tr.data('server-model', jamTrack);
            $tbody.append($tr);
          });
        })
        .fail(function(jqXHR, textStatus, errorMessage) {
          app.ajaxError(jqXHR, textStatus, errorMessage);
        });
    }


    function registerStaticEvents() {
      $tbody.on('click', 'tr', function(e) {
        var jamTrack = $(this).data('server-model');

        // tell the server we are about to open a jamtrack
        rest.openJamTrack({id: context.SessionStore.id(), jam_track_id: jamTrack.id})
          .done(function(response) {
            $dialog.data('result', {success:true, jamTrack: jamTrack})
            context.SessionActions.updateSession.trigger(response);
            app.layout.closeDialog('open-jam-track-dialog');
          })
          .fail(function(jqXHR) {
            app.notifyServerError(jqXHR, "Unable to Open JamTrack For Playback");
          })

        return false;
      })

      context.JK.helpBubble($downloadedTrackHelp, 'downloaded-jamtrack', {}, {width:'400px'})
      $downloadedTrackHelp.on('click', false)

      context.JK.helpBubble($whatAreJamTracks, 'no help yet for this topic', {}, {positions:['bottom'], offsetParent: $dialog})
      $whatAreJamTracks.on('click', false) // no help yet
    }

    function initialize(){
      var dialogBindings = {
        'beforeShow' : beforeShow,
        'afterShow' : afterShow,
        'afterHide': afterHide
      };

      app.bindDialog('open-jam-track-dialog', dialogBindings);

      $dialog = $('#open-jam-track-dialog');
      $tbody = $dialog.find('table.open-jam-tracks tbody');
      $paginatorHolder = $dialog.find('.paginator-holder');
      $templateOpenJamTrackRow = $('#template-jam-track-row')
      $downloadedTrackHelp = $dialog.find('.downloaded-jamtrack-help')
      $whatAreJamTracks = $dialog.find('.what-are-jamtracks')

      registerStaticEvents();
    };


    this.initialize = initialize;
    this.isShowing = function isShowing() { return showing; }
  }

  return this;
})(window,jQuery);