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 | forecolor backcolor | customimageuploader | codesample"],
          plugins: "customimageuploader,link,advlist,codesample,autolink,lists,charmap,hr,anchor,searchreplace,wordcount,visualblocks,visualchars,insertdatetime,nonbreaking,save,contextmenu,directionality,paste,textcolor,colorpicker,textpattern,imagetools",
          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"}],
          removed_menuitems: 'newdocument',
          elementpath: false,
          default_link_target: "_blank",
          target_list: [
            {title: 'New page', value: '_blank'},
            {title: 'Same page', value: '_self'}
          ],
          style_formats: [
            {title: 'Headers', items: [
              {title: 'Header 1', format: 'h1'},
              {title: 'Header 2', format: 'h2'},
              {title: 'Header 3', format: 'h3'},
              {title: 'Header 4', format: 'h4'},
              {title: 'Header 5', format: 'h5'},
              {title: 'Header 6', format: 'h6'}
            ]},
            {title: 'Inline', items: [
              {title: 'Bold', icon: 'bold', format: 'bold'},
              {title: 'Italic', icon: 'italic', format: 'italic'},
              {title: 'Underline', icon: 'underline', format: 'underline'},
              {title: 'Strikethrough', icon: 'strikethrough', format: 'strikethrough'},
              {title: 'Superscript', icon: 'superscript', format: 'superscript'},
              {title: 'Subscript', icon: 'subscript', format: 'subscript'},
              {title: 'Code', icon: 'code', format: 'code'}
            ]},
            {title: 'Blocks', items: [
              {title: 'Paragraph', format: 'p'},
              {title: 'Blockquote', format: 'blockquote'}
            ]},
            {title: 'Alignment', items: [
              {title: 'Left', icon: 'alignleft', format: 'alignleft'},
              {title: 'Center', icon: 'aligncenter', format: 'aligncenter'},
              {title: 'Right', icon: 'alignright', format: 'alignright'},
              {title: 'Justify', icon: 'alignjustify', format: 'alignjustify'}
            ]}
          ],
          init_instance_callback: function(editor) {
            SmartAnnotation.init($(editor.contentDocument.activeElement));
            initHighlightjsIframe($(this.iframeElement).contents());
          },
          setup: function(editor) {
            editor.on('keydown', 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
  });

})();