IriSP.AnnotationsListWidget = function(Popcorn, config, Serializer) {

  IriSP.Widget.call(this, Popcorn, config, Serializer);

  this.__counter = 0;

  this.__oldList = [];

};

IriSP.AnnotationsListWidget.prototype = new IriSP.Widget();

IriSP.AnnotationsListWidget.prototype.clear = function() {

};

IriSP.AnnotationsListWidget.prototype.clearWidget = function() {

};

/** draw the annotation list */

IriSP.AnnotationsListWidget.prototype.drawList = function(force_redraw) {

  var _this = this;

  var view_type = this._serializer.getContributions();

  var annotations = this._serializer._data.annotations;

  var currentTime = this._Popcorn.currentTime();

  var list = [];

  if (typeof(view_type) === "undefined") {

    console.log("no type suitable for display");

    return;

  }

  for (i = 0; i < annotations.length; i++) {

    var annotation = annotations[i];

    /* filter the annotations whose type is not the one we want */

    if (typeof(annotation.meta) !== "undefined" && typeof(annotation.meta["id-ref"]) !== "undefined"

        continue;

    }

    /* only get the annotations happening in the current chapter */

    if (!(annotation.begin <= currentTime * 1000 && annotation.end > currentTime * 1000)) {        

        continue;

    }

    var a = annotation;

    var obj = {};

    obj["id"] = a.id;

    obj["title"] = a.content.title;

    obj["desc"] = a.content.description;

    obj["begin"] = IriSP.msToTime(annotation.begin);

    obj["end"] = IriSP.msToTime(annotation.end);

    list.push(obj);

  }

  var idList = IriSP.underscore.pluck(list, "id").sort();

  if (idList.length !== this.__oldList.length) {

    var widgetMarkup = IriSP.templToHTML(IriSP.annotationsListWidget_template, {annotations: list});

    this.selector.html(widgetMarkup);

  }

  var res = 1;

  for (var i = 0; i < idList.length; i++) {

    if (idList[i] !== this.__oldList[i])

      res = 0;

      break;

  }

  this.__oldList = idList; /* save for next call */

  if (typeof(force_redraw) !== "undefined") {

    console.log("forced redraw");

    var widgetMarkup = IriSP.templToHTML(IriSP.annotationsListWidget_template, {annotations: list});

    this.selector.html(widgetMarkup);

  }

  /* the two lists are equal, no need to redraw */

  if (res === 1) {

    return;

  } else {

    var widgetMarkup = IriSP.templToHTML(IriSP.annotationsListWidget_template, {annotations: list});

    this.selector.html(widgetMarkup);

  }

};

IriSP.AnnotationsListWidget.prototype.draw = function() {

  this.drawList();

  this._Popcorn.listen("IriSP.createAnnotationWidget.addedAnnotation", IriSP.wrap(this, function() { this.redraw(true); }));

  this._Popcorn.listen("timeupdate", IriSP.wrap(this, this.redraw));

};

IriSP.AnnotationsListWidget.prototype.redraw = function() {

  this.drawList();

};