/*global ace:true */

/**
  A view that wraps the ACE editor (http://ace.ajax.org/)

  @class AceEditorView
  @extends Discourse.View
  @namespace Discourse
  @module Discourse
**/
Discourse.AceEditorView = Discourse.View.extend({
  mode: 'css',
  classNames: ['ace-wrapper'],

  contentChanged: (function() {
    if (this.editor && !this.skipContentChangeEvent) {
      return this.editor.getSession().setValue(this.get('content'));
    }
  }).observes('content'),

  render: function(buffer) {
    buffer.push("<div class='ace'>");
    if (this.get('content')) {
      buffer.push(Handlebars.Utils.escapeExpression(this.get('content')));
    }
    return buffer.push("</div>");
  },

  willDestroyElement: function() {
    if (this.editor) {
      this.editor.destroy();
      this.editor = null;
    }
  },

  didInsertElement: function() {
    var initAce,
      _this = this;

    initAce = function() {
      _this.editor = ace.edit(_this.$('.ace')[0]);
      _this.editor.setTheme("ace/theme/chrome");
      _this.editor.setShowPrintMargin(false);
      _this.editor.getSession().setMode("ace/mode/" + (_this.get('mode')));
      return _this.editor.on("change", function(e) {
        /* amending stuff as you type seems a bit out of scope for now - can revisit after launch
           changes = @get('changes')
           unless changes
             changes = []
             @set('changes', changes)
           changes.push e.data
        */
        _this.skipContentChangeEvent = true;
        _this.set('content', _this.editor.getSession().getValue());
        _this.skipContentChangeEvent = false;
      });
    };
    if (window.ace) {
      return initAce();
    } else {
      return $LAB.script('http://d1n0x3qji82z53.cloudfront.net/src-min-noconflict/ace.js').wait(initAce);
    }
  }
});