/**
    * This file Copyright (c) 2008-2015 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.module.templatingkit.templates.areas;
  
  import info.magnolia.jcr.util.NodeTypes;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.module.templatingkit.functions.STKTemplatingFunctions;
  import info.magnolia.module.templatingkit.navigation.Link;
  import info.magnolia.module.templatingkit.templates.AbstractSTKTemplateModel;
  import info.magnolia.module.templatingkit.templates.pages.STKPage;
  import info.magnolia.module.templatingkit.templates.pages.STKPageModel;
  import info.magnolia.objectfactory.Components;
  import info.magnolia.rendering.model.RenderingModel;
  import info.magnolia.rendering.template.AreaDefinition;
  import info.magnolia.templating.functions.TemplatingFunctions;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Iterator;
  import java.util.List;
  
  import javax.inject.Inject;
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * AreaModel of the contentNavigation area.
   * This model us usually used on content pages.
   * It displays a base navigation for pages lower in levels than the standard navigation.
   *
   * @param <RD> - an instance of {@link AreaDefinition}
   */
  public class ContentNavigationAreaModel<RD extends AreaDefinition> extends AbstractSTKTemplateModel<RD> {
  
      private static Logger log = LoggerFactory.getLogger(ContentNavigationAreaModel.class);
  
      @Inject
      public ContentNavigationAreaModel(Node content, RD definition, RenderingModel<?> parent, STKTemplatingFunctions stkFunctions, TemplatingFunctions templatingFunctions) {
          super(content, definition, parent, stkFunctions, templatingFunctions);
      }
  
      public Collection<Link> getContentNavigation() throws RepositoryException {
          STKPageModel<STKPage> pageModel = (STKPageModel<STKPage>) getRoot();
          int maxNavLevel = pageModel.getNavigation().getHorizontalLevel() + pageModel.getNavigation().getVerticalLevel() + getSiteRoot().getDepth();
  
          Iterable<Node> children = NodeUtil.getNodes(getRoot().getNode(), NodeTypes.Page.NAME);
          Iterator<Node> childrenIterator = children.iterator();
  
          int depth = content.getDepth();
          if(depth >= maxNavLevel && childrenIterator.hasNext()) {
              List<Link> items = new ArrayList<Link>();
  
              while(childrenIterator.hasNext()) {
                  Node current = childrenIterator.next();
                  items.add(Components.newInstance(Link.class, current));
              }
              return items;
          }
  
          return null;
      }
  
  }