/**
    * This file Copyright (c) 2016-2018 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.clipboard;
  
  import info.magnolia.jcr.predicate.NodeTypePredicate;
  import info.magnolia.jcr.util.NodeNameHelper;
  import info.magnolia.jcr.util.NodeTypes;
  import info.magnolia.jcr.util.NodeTypes.Renderable;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.pages.app.detail.PageEditorStatus;
  import info.magnolia.ui.contentapp.action.clipboard.JcrClipboard;
  import info.magnolia.ui.datasource.jcr.JcrDatasource;
  import info.magnolia.ui.contentapp.browser.ItemInteractionAvailability;
  
  import java.util.List;
  import java.util.stream.Collectors;
  import java.util.stream.Stream;
  
  import javax.inject.Inject;
  import javax.jcr.Item;
  import javax.jcr.Node;
  
  import com.machinezoo.noexception.Exceptions;
  
  /**
   * Subapp-scoped singleton for holding information about copied components.
   */
  public class ComponentContentClipboard extends JcrClipboard {
  
      private final PageEditorStatus pageEditorStatus;
  
      @Inject
      public ComponentContentClipboard(ItemInteractionAvailability<Item> itemInteractionAvailability,
                                       NodeNameHelper nodeNameHelper,
                                       PageEditorStatus pageEditorStatus, JcrDatasource jcrDatasource) {
          super(itemInteractionAvailability, nodeNameHelper, jcrDatasource);
          this.pageEditorStatus = pageEditorStatus;
      }
  
      @Override
      public void copy(final List<Item> source) {
          super.copy(source.stream()
                  .filter(Item::isNode)
                  .map(Node.class::cast)
                  .flatMap(Exceptions.wrap().function(node -> {
                      if (NodeUtil.isNodeType(node, NodeTypes.Component.NAME)) {
                          return Stream.of(node);
                      } else if (NodeUtil.isNodeType(node, NodeTypes.Area.NAME)) {
                          return NodeUtil.asList(NodeUtil.getNodes(node, new NodeTypePredicate(NodeTypes.Component.NAME))).stream();
                      } else {
                          return Stream.empty();
                      }
                  }))
                  .collect(Collectors.toList())
          );
      }
  
      @Override
      protected boolean canPasteInto(Item sourceItem, Item destinationItem) {
          return super.canPasteInto(sourceItem, destinationItem) && Exceptions.wrap().get(() -> {
              final Node area = (Node) destinationItem;
              final String template = Renderable.getTemplate((Node) sourceItem);
              return NodeUtil.isNodeType(area, NodeTypes.Area.NAME) && pageEditorStatus.getAvailableTemplates().contains(template);
          });
      }
  
  }