/**
    * This file Copyright (c) 2019 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.pages.app.detail.action;
  
  import info.magnolia.jcr.util.NodeTypes;
  import info.magnolia.pages.app.detail.PageEditorStatus;
  import info.magnolia.ui.ValueContext;
  import info.magnolia.ui.api.action.AbstractAction;
  import info.magnolia.ui.observation.DatasourceObservation;
  import info.magnolia.ui.vaadin.gwt.client.shared.AbstractElement;
  import info.magnolia.ui.vaadin.gwt.client.shared.AreaElement;
  import info.magnolia.ui.vaadin.gwt.client.shared.ComponentElement;
  import info.magnolia.ui.vaadin.gwt.client.shared.PageElement;
  
  import javax.inject.Inject;
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.apache.commons.lang3.StringUtils;
  
  import com.machinezoo.noexception.Exceptions;
  
  /**
   * Delete element action.
   *
   * @param <D> type of definition
   */
  public class DeleteElementAction<D extends DeleteElementActionDefinition> extends AbstractAction<D> {
  
      private final ValueContext<Node> valueContext;
      private final DatasourceObservation.Manual datasourceObservation;
      private final PageEditorStatus pageEditorStatus;
  
      @Inject
      public DeleteElementAction(D definition,
                                 ValueContext<Node> valueContext,
                                 DatasourceObservation.Manual datasourceObservation,
                                 PageEditorStatus pageEditorStatus) {
          super(definition);
          this.valueContext = valueContext;
          this.datasourceObservation = datasourceObservation;
          this.pageEditorStatus = pageEditorStatus;
      }
  
      @Override
      public void execute() {
          valueContext.getSingle()
                  .ifPresent(Exceptions.wrap().consumer(node -> {
                      Node parent = node.getParent();
                      node.remove();
                      node.getSession().save();
                      pageEditorStatus.setSelectedElement(getElementFrom(parent));
                      datasourceObservation.trigger();
                  }));
      }
  
      protected AbstractElement getElementFrom(Node node) throws RepositoryException {
          AbstractElement selectedElement;
          String workspace = node.getSession().getWorkspace().getName();
          switch (node.getPrimaryNodeType().getName()) {
          case NodeTypes.Component.NAME:
              selectedElement = new ComponentElement(workspace, node.getPath(), StringUtils.EMPTY);
              break;
          case NodeTypes.Area.NAME:
              selectedElement = new AreaElement(workspace, node.getPath(), StringUtils.EMPTY, StringUtils.EMPTY);
              break;
          case NodeTypes.Page.NAME:
              selectedElement = new PageElement(workspace, node.getPath(), StringUtils.EMPTY);
             break;
         default:
             throw new IllegalArgumentException("Unidentified node type found: " + node.getPrimaryNodeType().getName());
         }
         return selectedElement;
     }
 
     protected DatasourceObservation.Manual getDatasourceObservation() {
         return datasourceObservation;
     }
 
     protected PageEditorStatus getPageEditorStatus() {
         return pageEditorStatus;
     }
 }