Drupal.behaviors.dndLibrary = function(context) {
  $('.dnd-library-wrapper:not(.dnd-processed)', context).each(function() {
    var $this = $(this);

    // This is a bad hack to lop off '-dnd-library' from the id to get the editor name
    var editor = this.id.slice(0, -12); 

    // Attempt to attach library
    //Drupal.behaviors.dndLibrary.attach_library(false, Drupal.wysiwyg.instances[editor]);

    // Bind Drag and Drop plugin invocation to wywsiwygAttach event
    $('#' + editor).bind('wysiwygAttach', Drupal.behaviors.dndLibrary.attach_library);

    // @TODO track and clear intervals to save memory at the cost of 
    // more processing?
    $('#' + editor).bind('wysiwygDetach', Drupal.behaviors.dndLibrary.detach_library);

    // Ajax pager
    $('.pager a', $this).click(function(e, data) {
      $.getJSON(this.href, function(data) {
        $('.header', $this).html(data.header);
        $('.library', $this).html(data.library);
        //$('.footer', $this).html(data.footer);
        for (editor_id in data.editor_representations) {
          Drupal.settings.dndEditorRepresentations[editor_id] = data.editor_representations[editor_id];
        }
        var params = Drupal.wysiwyg.instances[editor];
        $('#' + editor).trigger('wysiwygAttach', params);
      });
      return false;
    });

    $this.addClass('dnd-processed');
  });
}

Drupal.behaviors.dndLibrary.attach_library = function(e, data) {
  var settings = {
    renderRepresentation: function(target, drop, representation_id) {
      return Drupal.settings.dndEditorRepresentations[representation_id];
    }
  }
  settings = $.extend(settings, Drupal.settings.dndEnabledLibraries[data.field]);

  var editor_fn = 'attach_' + data.editor;
  if ($.isFunction(window.Drupal.behaviors.dndLibrary[editor_fn])) {
    window.Drupal.behaviors.dndLibrary[editor_fn](data, settings); 
  }
}

Drupal.behaviors.dndLibrary.detach_library = function(e, data) {
  console.log('detach');
}


Drupal.behaviors.dndLibrary.attach_tinymce = function(data, settings) {

  var tiny_instance = tinyMCE.getInstanceById(data.field);

  // If the Tiny instance exists, attach directly, otherwise wait until Tiny
  // has registered a new instance.
  if (tiny_instance) { 
    Drupal.behaviors.dndLibrary._attach_tinymce(data, settings, tiny_instance);
  } else {
    var t = setInterval(function() {
      var tiny_instance = tinyMCE.getInstanceById(data.field);
      if (tiny_instance) {
        Drupal.behaviors.dndLibrary._attach_tinymce(data, settings, tiny_instance);
        clearInterval(t);
      }
    }, 100);
  }
}

Drupal.behaviors.dndLibrary._attach_tinymce = function(data, settings, tiny_instance) {
  settings = $.extend({
    targets: $('#'+ data.field +'-wrapper iframe'),
    insertAfter: '<p><span id="__caret">_</span></p>',
    postprocessDrop: function(target, drop, element) {
      // Get our special span, select it, delete it, and hope the caret
      // resets correctly.
      tiny_instance.selection.select(tiny_instance.dom.get('__caret'));
      tiny_instance.execCommand('Delete', false, null);
      tiny_instance.dom.remove('__caret');

      // Add some classes to the library items
      $(element).addClass('dnd-inserted'); 
      $(element).parents('.editor-item').addClass('dnd-child-inserted');
    }
  }, settings);

  $(settings.drop_selector).dnd(settings);
}