define([
    "../app/Router",
    "../model/classes/questions",
    "./_ObjectPage",
    "dojo/Deferred",
    "dojo/_base/declare",
    "dojo/_base/event",
    "dojo/_base/lang",
    "require",
    "dojo/text!./templates/question.html"
], function(Router, questions, _ObjectPage, Deferred, declare, event, lang, require, template) {
    return declare([_ObjectPage], {
        contextRequire: require,
        templateString: template,
        _preview: null,
        classStore: questions,
        startup: function() {
            if ( this._started ) { return; }
            this.inherited(arguments);
            this.own(this.QuestionEditorToolkit.on('change',lang.hitch(this,'_handlePropertiesChange')));
            this.own(this.contentList.on('change',lang.hitch(this,'_handleContentChange')));
            this._load();
        },
        _refresh: function(initial) {
            if ( initial === true ) {
                this.QuestionEditorToolkit.set('value',this.object,null);
                this.contentList.set('value',this.object.content,null);
            }
            this.titleNode.innerHTML = this.object.title || "";
            if ( this.object.publicationDate ) {
                this.QuestionEditorToolkit.set('readOnly',true);
                this.contentList.set('readOnly',true);
            }
        },
        _handlePropertiesChange: function() {
            this._updateObject();
            this.markDirty();
            this._refresh();
        },
        _handleContentChange: function() {
            this._updateObject();
            this.markDirty();
            this._refresh();
        },
        _updateObject: function() {
            var pValid = this.QuestionEditorToolkit.validate();
            lang.mixin(this.object,this.QuestionEditorToolkit.get('value'));
            var cValid = this.contentList.validate();
            this.object.content = this.contentList.get('value');
            this._isValid = pValid && cValid;
            return this._isValid;
        },
        _save: function() {
            if ( this._updateObject() ) {
                return this.inherited(arguments);
            } else {
                return new Deferred().reject({error:"Please correct invalid values."});
            }
        },
        _onSave: function(evt) {
            this._save();
            if ( evt ) { event.stop( evt ); }
            return false;
        },
        _onSaveAndClose: function(evt) {
            this._save()
            .then(function(){
                Router.go(questions.getCollectionPath());
            });
            if ( evt ) { event.stop( evt ); }
            return false;
        },
        _onDiscard: function(evt) {
            this.markClean();
            Router.go(questions.getCollectionPath());
            if ( evt ) { event.stop( evt ); }
            return false;
        },
        markDirty: function() {
            this.saveBtn.set('disabled',!this._isValid);
            this.saveAndCloseBtn.set('disabled',!this._isValid);
            this.discardBtn.set('label','Discard & Close');
            this.inherited(arguments);
        },
        markClean: function() {
            this.saveBtn.set('disabled',true);
            this.saveAndCloseBtn.set('disabled',true);
            this.discardBtn.set('label','Close');
            this.inherited(arguments);
        },
        _ignore: function(evt) {
            if ( evt ) { event.stop( evt ); }
            return false;
        }
    });
});