(function($) {

/**
 * Initialize editor instances.
 *
 * @todo Is the following note still valid for 3.x?
 * This function needs to be called before the page is fully loaded, as
 * calling tinyMCE.init() after the page is loaded breaks IE6.
 *
 * @param editorSettings
 *   An object containing editor settings for each input format.
 */
Drupal.wysiwyg.editor.init.tinymce = function(settings) {
  // If JS compression is enabled, TinyMCE is unable to autodetect its global
  // settinge, hence we need to define them manually.
  // @todo Move global library settings somewhere else.
  tinyMCE.baseURL = settings.global.editorBasePath;
  tinyMCE.srcMode = (settings.global.execMode == 'src' ? '_src' : '');
  tinyMCE.gzipMode = (settings.global.execMode == 'gzip');

  // Initialize editor configurations.
  for (var format in settings) {
    if (format == 'global') {
      continue;
    };
    tinyMCE.init(settings[format]);
    if (Drupal.settings.wysiwyg.plugins[format]) {
      // Load native external plugins.
      // Array syntax required; 'native' is a predefined token in JavaScript.
      for (var plugin in Drupal.settings.wysiwyg.plugins[format]['native']) {
        tinymce.PluginManager.load(plugin, Drupal.settings.wysiwyg.plugins[format]['native'][plugin]);
      }
      // Load Drupal plugins.
      for (var plugin in Drupal.settings.wysiwyg.plugins[format].drupal) {
        Drupal.wysiwyg.editor.instance.tinymce.addPlugin(plugin, Drupal.settings.wysiwyg.plugins[format].drupal[plugin], Drupal.settings.wysiwyg.plugins.drupal[plugin]);
      }
    }
  }
};

/**
 * Attach this editor to a target element.
 *
 * See Drupal.wysiwyg.editor.attach.none() for a full desciption of this hook.
 */
Drupal.wysiwyg.editor.attach.tinymce = function(context, params, settings) {
  // Configure editor settings for this input format.
  var ed = new tinymce.Editor(params.field, settings);
  // Reset active instance id on any event.
  ed.onEvent.add(function(ed, e) {
    Drupal.wysiwyg.activeId = ed.id;
  });
  // Make toolbar buttons wrappable (required for IE).
  ed.onPostRender.add(function (ed) {
    var $toolbar = $('<div class="wysiwygToolbar"></div>');
    $('#' + ed.editorContainer + ' table.mceToolbar > tbody > tr > td').each(function () {
      $('<div></div>').addClass(this.className).append($(this).children()).appendTo($toolbar);
    });
    $('#' + ed.editorContainer + ' table.mceLayout td.mceToolbar').append($toolbar);
    $('#' + ed.editorContainer + ' table.mceToolbar').remove();
  });

  // Remove TinyMCE's internal mceItem class, which was incorrectly added to
  // submitted content by Wysiwyg <2.1. TinyMCE only temporarily adds the class
  // for placeholder elements. If preemptively set, the class prevents (native)
  // editor plugins from gaining an active state, so we have to manually remove
  // it prior to attaching the editor. This is done on the client-side instead
  // of the server-side, as Wysiwyg has no way to figure out where content is
  // stored, and the class only affects editing.
  $field = $('#' + params.field);
  $field.val($field.val().replace(/(<.+?\s+class=['"][\w\s]*?)\bmceItem\b([\w\s]*?['"].*?>)/ig, '$1$2'));

  // Attach editor.
  ed.render();
};

/**
 * Detach a single or all editors.
 *
 * See Drupal.wysiwyg.editor.detach.none() for a full desciption of this hook.
 */
Drupal.wysiwyg.editor.detach.tinymce = function(context, params) {
  if (typeof params != 'undefined') {
    var instance = tinyMCE.get(params.field);
    if (instance) {
      instance.save();
      instance.remove();
    }
  }
  else {
    // Save contents of all editors back into textareas.
    tinyMCE.triggerSave();
    // Remove all editor instances.
    for (var instance in tinyMCE.editors) {
      tinyMCE.editors[instance].remove();
    }
  }
};

Drupal.wysiwyg.editor.instance.tinymce = {
  addPlugin: function(plugin, settings, pluginSettings) {
    if (typeof Drupal.wysiwyg.plugins[plugin] != 'object') {
      return;
    }
    tinymce.create('tinymce.plugins.' + plugin, {
      /**
       * Initialize the plugin, executed after the plugin has been created.
       *
       * @param ed
       *   The tinymce.Editor instance the plugin is initialized in.
       * @param url
       *   The absolute URL of the plugin location.
       */
      init: function(ed, url) {
        // Register an editor command for this plugin, invoked by the plugin's button.
        ed.addCommand(plugin, function() {
          if (typeof Drupal.wysiwyg.plugins[plugin].invoke == 'function') {
            var data = { format: 'html', node: ed.selection.getNode(), content: ed.selection.getContent() };
            // TinyMCE creates a completely new instance for fullscreen mode.
            var instanceId = ed.id == 'mce_fullscreen' ? ed.getParam('fullscreen_editor_id') : ed.id;
            Drupal.wysiwyg.plugins[plugin].invoke(data, pluginSettings, instanceId);
          }
        });

        // Register the plugin button.
        ed.addButton(plugin, {
          title : settings.iconTitle,
          cmd : plugin,
          image : settings.icon
        });

        // Load custom CSS for editor contents on startup.
        ed.onInit.add(function() {
          if (settings.css) {
            ed.dom.loadCSS(settings.css);
          }
        });

        // Attach: Replace plain text with HTML representations.
        ed.onBeforeSetContent.add(function(ed, data) {
          if (typeof Drupal.wysiwyg.plugins[plugin].attach == 'function') {
            data.content = Drupal.wysiwyg.plugins[plugin].attach(data.content, pluginSettings, ed.id);
            data.content = Drupal.wysiwyg.editor.instance.tinymce.prepareContent(data.content);
          }
        });

        // Detach: Replace HTML representations with plain text.
        ed.onGetContent.add(function(ed, data) {
          if (typeof Drupal.wysiwyg.plugins[plugin].detach == 'function') {
            data.content = Drupal.wysiwyg.plugins[plugin].detach(data.content, pluginSettings, ed.id);
          }
        });

        // isNode: Return whether the plugin button should be enabled for the
        // current selection.
        ed.onNodeChange.add(function(ed, command, node) {
          if (typeof Drupal.wysiwyg.plugins[plugin].isNode == 'function') {
            command.setActive(plugin, Drupal.wysiwyg.plugins[plugin].isNode(node));
          }
        });
      },

      /**
       * Return information about the plugin as a name/value array.
       */
      getInfo: function() {
        return {
          longname: settings.title
        };
      }
    });

    // Register plugin.
    tinymce.PluginManager.add(plugin, tinymce.plugins[plugin]);
  },

  openDialog: function(dialog, params) {
    var instanceId = this.isFullscreen() ? 'mce_fullscreen' : this.field;
    var editor = tinyMCE.get(instanceId);
    editor.windowManager.open({
      file: dialog.url + '/' + instanceId,
      width: dialog.width,
      height: dialog.height,
      inline: 1
    }, params);
  },

  closeDialog: function(dialog) {
    var instanceId = this.isFullscreen() ? 'mce_fullscreen' : this.field;
    var editor = tinyMCE.get(instanceId);
    editor.windowManager.close(dialog);
  },

  prepareContent: function(content) {
    // Certain content elements need to have additional DOM properties applied
    // to prevent this editor from highlighting an internal button in addition
    // to the button of a Drupal plugin.
    var specialProperties = {
      img: { 'class': 'mceItem' }
    };
    var $content = $('<div>' + content + '</div>'); // No .outerHTML() in jQuery :(
    // Find all placeholder/replacement content of Drupal plugins.
    $content.find('.drupal-content').each(function() {
      // Recursively process DOM elements below this element to apply special
      // properties.
      var $drupalContent = $(this);
      $.each(specialProperties, function(element, properties) {
        $drupalContent.find(element).andSelf().each(function() {
          for (var property in properties) {
            if (property == 'class') {
              $(this).addClass(properties[property]);
            }
            else {
              $(this).attr(property, properties[property]);
            }
          }
        });
      });
    });
    return $content.html();
  },

  insert: function(content) {
    content = this.prepareContent(content);
    var instanceId = this.isFullscreen() ? 'mce_fullscreen' : this.field;
    tinyMCE.execInstanceCommand(instanceId, 'mceInsertContent', false, content);
  },

  isFullscreen: function() {
    // TinyMCE creates a completely new instance for fullscreen mode.
    return tinyMCE.activeEditor.id == 'mce_fullscreen' && tinyMCE.activeEditor.getParam('fullscreen_editor_id') == this.field;
  }
};

})(jQuery);