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

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

  this._hidden = true;

  this.keywords = IriSP.widgetsDefaults["createAnnotationWidget"].keywords;

  this.cinecast_version = IriSP.widgetsDefaults["createAnnotationWidget"].cinecast_version;

  this.ids = {}; /* a dictionnary linking buttons ids to keywords */

};

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

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

    this.selector.find(".Ldt-SaTitle").text("");

    this.selector.find(".Ldt-SaDescription").text("");

    this.selector.find(".Ldt-SaKeywordText").text("");

};

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

  var _this = this;

  if (this.cinecast_version) {    

    var annotationMarkup = IriSP.templToHTML(IriSP.createAnnotationWidget_festivalCinecast_template);

  } else {

    var annotationMarkup = IriSP.templToHTML(IriSP.createAnnotationWidget_template);

  }

	this.selector.append(annotationMarkup);

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

    var keyword = this.keywords[i];

    var id = IriSP.guid("button_");

    var templ = IriSP.templToHTML("<button id={{id}} class='Ldt-createAnnotation-absent-keyword'>{{keyword}}</button>", 

                                  {keyword: keyword, id: id});

    this.ids[keyword] = id; // save it for the function that handle textarea changes.

    this.selector.find(".Ldt-createAnnotation-keywords").append(templ);

    this.selector.find("#" + id).click(function(keyword) { return function() {

      var contents = _this.selector.find(".Ldt-createAnnotation-Description").val();

      if (contents.indexOf(keyword) != -1) {

      } else {

        if (contents === "")

          var newVal = keyword;

        else

          var newVal = contents + " " + keyword;      

      }

      _this.selector.find(".Ldt-createAnnotation-Description").val(newVal);

      // we use a custom event because there's no simple way to test for a js

      // change in a textfield.

      _this.selector.find(".Ldt-createAnnotation-Description").trigger("js_mod");

      // also call our update function.

      _this.handleTextChanges();

    }

   }(keyword));

  }

  this.selector.find(".Ldt-createAnnotation-Description")

               .bind("propertychange keyup input paste", IriSP.wrap(this, this.handleTextChanges));

  this.selector.find(".Ldt-createAnnotation-submitButton").click(IriSP.wrap(this, this.handleButtonClick));

};

IriSP.createAnnotationWidget.prototype.handleAnnotateSignal = function() {

  if (this._hidden == false) {

    this.selector.hide();

    this._hidden = true;

    // free the arrow.

    this._Popcorn.trigger("IriSP.ArrowWidget.releaseArrow");

  } else {

    this.selector.show();

    this._hidden = false;

    // block the arrow.

    this._Popcorn.trigger("IriSP.ArrowWidget.blockArrow");

  }

};

/** watch for changes in the textfield and change the buttons accordingly */

IriSP.createAnnotationWidget.prototype.handleTextChanges = function(event) {

  var contents = this.selector.find(".Ldt-createAnnotation-Description").val();

  for(var keyword in this.ids) {

    var id = this.ids[keyword];

    if (contents.indexOf(keyword) != -1) {

      /* the word is present in the textarea but the button is not toggled */

      if (this.selector.find("#" + id).hasClass("Ldt-createAnnotation-absent-keyword"))

          this.selector.find("#" + id).removeClass("Ldt-createAnnotation-absent-keyword")

                                      .addClass("Ldt-createAnnotation-present-keyword");      

    } else {

      /* the word is absent from the textarea but the button is toggled */

      if (this.selector.find("#" + id).hasClass("Ldt-createAnnotation-present-keyword")) {

          this.selector.find("#" + id).removeClass("Ldt-createAnnotation-present-keyword")

                                      .addClass("Ldt-createAnnotation-absent-keyword");

      }

    }

  }

};

/** handle clicks on "send annotation" button */

IriSP.createAnnotationWidget.prototype.handleButtonClick = function(event) {

  var _this = this;

  var textfield = this.selector.find(".Ldt-createAnnotation-Description");

  var contents = textfield.val();

    if (this.selector.find(".Ldt-createAnnotation-errorMessage").length === 0) {

      this.selector.find(".Ldt-createAnnotation-Container")

                   .after(IriSP.templToHTML(IriSP.createAnnotation_errorMessage_template));

      textfield.css("background-color", "#d93c71");      

    } else {

      this.selector.find(".Ldt-createAnnotation-errorMessage").show();

    }

                      var contents = textfield.val();

                      if (contents !== "") {

                        this.selector.find(".Ldt-createAnnotation-errorMessage").hide();

                        textfield.css("background-color", "");

                      }

                   }));

  } else {

    if (typeof(this._currentAnnotation) === "undefined") {      

      console.log("this._currentAnnotation undefined");

      return;

    }

                    /* add the annotation to the annotations and tell the world */

                    delete annotation.tags;

                    annotation.content.description = annotation.content.data;

                    delete annotation.content.data;

                    annotation.id = json.annotations[0].id;

                    annotation.title = _this._currentAnnotation.content.title;

                    annotation.meta = meta;

                    annotation.meta["id-ref"] = annotation["type"];

                    // everything is shared so there's no need to propagate the change

                    _this._serializer._data.annotations.push(annotation);

                    _this._Popcorn.trigger("IriSP.createAnnotationWidget.addedAnnotation");

};