/**
    * This file Copyright (c) 2012-2014 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.ui.contentapp.movedialog.action;
  
  import info.magnolia.event.EventBus;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.ui.api.action.ActionExecutionException;
  import info.magnolia.ui.api.context.UiContext;
  import info.magnolia.ui.api.event.AdmincentralEventBus;
  import info.magnolia.ui.api.event.ContentChangedEvent;
  import info.magnolia.ui.contentapp.movedialog.MoveActionCallback;
  import info.magnolia.ui.framework.action.AbstractMultiItemAction;
  import info.magnolia.ui.framework.action.MoveLocation;
  import info.magnolia.ui.vaadin.integration.jcr.JcrItemAdapter;
  import info.magnolia.ui.vaadin.integration.jcr.JcrItemUtil;
  import info.magnolia.ui.vaadin.integration.jcr.JcrNodeAdapter;
  
  import java.util.List;
  
  import javax.inject.Named;
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  import javax.jcr.Session;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.vaadin.data.Item;
  
  /**
   * Action that moves a node.
   *
   * @see MoveNodeActionDefinition
   */
  public class MoveNodeAction extends AbstractMultiItemAction<MoveNodeActionDefinition> {
  
      private final Logger log = LoggerFactory.getLogger(getClass());
  
      /**
       * The item where the items should be moved relative to.
       */
      private final JcrNodeAdapter targetItem;
  
      protected final EventBus admincentralEventBus;
  
      private MoveActionCallback callback;
  
      private MoveLocation moveLocation = MoveLocation.BEFORE;
  
      public MoveNodeAction(
              MoveNodeActionDefinition definition,
              List<JcrItemAdapter> items,
              JcrNodeAdapter targetItem,
              @Named(AdmincentralEventBus.NAME) EventBus admincentralEventBus,
              UiContext uiContext,
              MoveActionCallback callback) {
          super(definition, items, uiContext);
          this.targetItem = targetItem;
          this.admincentralEventBus = admincentralEventBus;
          this.callback = callback;
      }
  
      @Override
      public void execute() throws ActionExecutionException {
          super.execute();
          Item firstItem = getItems().get(0);
          if (firstItem instanceof JcrNodeAdapter) {
              JcrNodeAdapter nodeAdapter = (JcrNodeAdapter) firstItem;
             String itemIdOfChangedItem;
             try {
                 itemIdOfChangedItem = JcrItemUtil.getItemId(nodeAdapter.getJcrItem());
                 admincentralEventBus.fireEvent(new ContentChangedEvent(nodeAdapter.getWorkspace(), itemIdOfChangedItem));
                 callback.onMovePerformed(targetItem, moveLocation);
             } catch (RepositoryException e) {
                 callback.onMoveCancelled();
             }
         }
     }
 
     @Override
     protected void executeOnItem(JcrItemAdapter item) throws Exception {
         if (basicMoveCheck(item.getJcrItem(), targetItem.getJcrItem())) {
             moveLocation = getDefinition().getMoveLocation();
 
             Node source = (Node) item.getJcrItem();
             Node target = targetItem.getJcrItem();
 
             switch (moveLocation) {
                 case INSIDE:
                     NodeUtil.moveNode(source, target);
                     break;
                 case BEFORE:
                     NodeUtil.moveNodeBefore(source, target);
                     break;
                 case AFTER:
                     NodeUtil.moveNodeAfter(source, target);
                     break;
             }
             Session session = source.getSession();
             session.save();
         } else {
             callback.onMoveCancelled();
             throw new IllegalArgumentException("Move operation was not completed due to failed move validation.");
         }
     }
 
     @Override
     protected String getSuccessMessage() {
         return getDefinition().getSuccessMessage();
     }
 
     @Override
     protected String getFailureMessage() {
         return getDefinition().getFailureMessage();
     }
 
     /**
      * Perform basic check.
      */
     private boolean basicMoveCheck(javax.jcr.Item source, javax.jcr.Item target) throws RepositoryException {
         if (!target.isNode() || !source.isNode()) {
             return false;
         }
         if (target.getPath().equals(source.getPath())) {
             return false;
         }
         return !NodeUtil.isSame((Node) target, source.getParent());
     }
 }