var TinyMCE = (function() {
  'use strict';

  function initHighlightjs() {
    $('[class*=language]').each(function(i, block) {
      hljs.highlightBlock(block);
    });
  }

  function initHighlightjsIframe(iframe) {
    $('[class*=language]', iframe).each(function(i, block) {
      hljs.highlightBlock(block);
    });
  }

  // returns a public API for TinyMCE editor
  return Object.freeze({
    init : function() {
      if (typeof tinyMCE != 'undefined') {
        tinyMCE.init({
          selector: "textarea.tinymce",
          toolbar: ["undo redo | insert | styleselect | bold italic | alignleft aligncenter alignright alignjustify | bullist numlist outdent indent | link | print preview | forecolor backcolor | codesample"],
          plugins: "link,advlist,codesample,autolink,lists,link,charmap,print,preview,hr,anchor,pagebreak,searchreplace,wordcount,visualblocks,visualchars,code,fullscreen,insertdatetime,nonbreaking,save,table,contextmenu,directionality,paste,textcolor,colorpicker,textpattern,imagetools,toc",
          codesample_languages: [{"text":"R","value":"r"},{"text":"MATLAB","value":"matlab"},{"text":"Python","value":"python"},{"text":"JSON","value":"javascript"},{"text":"HTML/XML","value":"markup"},{"text":"JavaScript","value":"javascript"},{"text":"CSS","value":"css"},{"text":"PHP","value":"php"},{"text":"Ruby","value":"ruby"},{"text":"Java","value":"java"},{"text":"C","value":"c"},{"text":"C#","value":"csharp"},{"text":"C++","value":"cpp"}],
          init_instance_callback: function(editor) {
            SmartAnnotation.init($(editor.contentDocument.activeElement));
            initHighlightjsIframe($(this.iframeElement).contents());
          },
          setup: function(editor) {
            editor.on('Change', function(e) {
              if(e.keyCode == 13 && $(editor.contentDocument.activeElement).atwho('isSelecting')) {
                return false;
              }
            });

            editor.on('NodeChange', function(e) {
              var node = e.element;
              var editor = this;
              setTimeout(function() {
                if($(node).is('pre') && !editor.isHidden()){
                  initHighlightjsIframe($(editor.iframeElement).contents());
                }
              }, 200);

            });
          },
          codesample_content_css: '<%= asset_path('highlightjs-github-theme') %>'
        });
      }
    },
    destroyAll: function() {
      _.each(tinymce.editors, function(editor) {
        editor.destroy();
        initHighlightjs();
      });
    },
    refresh: function() {
      this.destroyAll();
      this.init();
    },
    getContent: function() {
      return tinymce.editors[0].getContent();
    },
    highlight: initHighlightjs
  });

})();