/**
    * This file Copyright (c) 2003-2013 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.rssaggregator.templates.components;
  
  import info.magnolia.context.MgnlContext;
  import info.magnolia.dam.DamException;
  import info.magnolia.dam.DamManager;
  import info.magnolia.jcr.util.SessionUtil;
  import info.magnolia.module.rssaggregator.RSSAggregatorConstants;
  import info.magnolia.module.rssaggregator.util.PagerUtil;
  import info.magnolia.module.rssaggregator.util.PlanetUtil;
  import info.magnolia.rendering.model.RenderingModel;
  import info.magnolia.rendering.template.TemplateDefinition;
  import info.magnolia.templating.functions.TemplatingFunctions;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Comparator;
  import java.util.Date;
  import java.util.List;
  
  import javax.inject.Inject;
  import javax.jcr.Node;
  import javax.jcr.NodeIterator;
  import javax.jcr.RepositoryException;
  
  import org.apache.commons.lang.StringUtils;
  
  
  /**
   * PlanetFeedModel.
   *
   * @param <RD> Definition type.
   * @author lfischer
   */
  public class PlanetFeedModel<RD extends TemplateDefinition> extends AbstractFeedModel<TemplateDefinition> {
  
      private static final String ARCHIVE_NODE = "planetData";
      private static final String DATE_PROPERTY = "pubDate";
      private DamManager damManager;
  
      @Inject
      public PlanetFeedModel(Node content, RD definition, RenderingModel<?> parent, TemplatingFunctions templatingFunctions, DamManager damManager) {
          super(content, definition, parent, templatingFunctions);
          this.damManager = damManager;
      }
  
      @Override
      public String execute() {
          return "success";
      }
  
      public PagerUtil getPager() throws RepositoryException {
          PagerUtil pager = null;
          Collection<Node> listItems = getItems();
          if (!listItems.isEmpty()) {
  
              final String currentPageLink;
              if (MgnlContext.isWebContext() && MgnlContext.getAggregationState() != null) {
                  currentPageLink = MgnlContext.getAggregationState().getOriginalURL();
              } else {
                  currentPageLink = templatingFunctions.link(MgnlContext.getAggregationState().getMainContent().getJCRNode());
              }
  
              pager = new PagerUtil(currentPageLink, listItems, content);
          }
          return pager;
     }
 
     public Collection<Node> getItems() {
         List<Node> listItems = new ArrayList<Node>();
 
         try {
             if (content.hasProperty("link")) {
                 Node rssParent = SessionUtil.getNode(RSSAggregatorConstants.WORKSPACE, content.getProperty("link").getString());
 
                 if (rssParent.hasNode(ARCHIVE_NODE)) {
                     NodeIterator nit = rssParent.getNode(ARCHIVE_NODE).getNodes();
                     while (nit.hasNext()) {
                         Node postsNode = nit.nextNode();
 
                         NodeIterator pit = postsNode.getNodes();
                         while (pit.hasNext()) {
                             Node nn = pit.nextNode();
                             boolean hidden = false;
                             if (nn.hasProperty("hidden")) {
                                 hidden = nn.getProperty("hidden").getBoolean();
                             }
                             if (!hidden) {
                                 listItems.add(nn);
                             }
                         }
                     }
                     sort(listItems);
                 }
             } else {
                 log.info("No feed specified for planet feeds.");
             }
         } catch (Exception e) {
             log.error("Problem while retrieving post items: " + e.getMessage());
         }
         return listItems;
     }
 
     protected void sort(Collection<Node> listItems) {
         Collections.sort((List<Node>) listItems, new Comparator<Node>() {
             public int compare(Node n1, Node n2) {
                 try {
                     Date d1 = n1.getProperty(DATE_PROPERTY).getDate().getTime();
                     Date d2 = n2.getProperty(DATE_PROPERTY).getDate().getTime();
                     // ascending sort
                     return d2.compareTo(d1);
                 } catch (RepositoryException e) {
                     log.error("Problem while sorting posts: " + e.getMessage());
                 }
                 return 0;
             }
         });
     }
 
     public String getDescription(String entryDescription, Integer abbreviation) {
         return PlanetUtil.formatDescription(entryDescription, abbreviation);
     }
 
     /**
      * Retrieve an author's Hackergotchi image if available.
      *
      * @param feedLink Link to the feed where the settings are fetched.
      * @return Link to the Hackergotchi image stored in DMS or null.
      */
     public String getHackergotchi(String feedLink) {
         try {
             Node rssParent = SessionUtil.getNode(RSSAggregatorConstants.WORKSPACE, content.getProperty("link").getString());
             String assetId = getFeedProperty(rssParent, FEEDS_NODE, "link", feedLink, "img");
             if (!StringUtils.isBlank(assetId)) {
                 return damManager.getAssetForId(assetId).getLink();
             }
         } catch (RepositoryException e) {
             log.error("Problem while fetching Hackergotchi: " + e.getMessage());
         } catch (DamException e) {
             log.error("Problem while fetching Hackergotchi: " + e.getMessage());
         }
         return null;
     }
 
     /**
      * Retrieve the title attribute of an individual feed subscription.
      *
      * @param feedLink Link to the feed.
      * @return Assigned title of a feed if defined in the dialog or null.
      */
     public String getFeedTitle(String feedLink) {
         try {
             Node rssParent = SessionUtil.getNode(RSSAggregatorConstants.WORKSPACE, content.getProperty("link").getString());
             return getFeedProperty(rssParent, "feeds", "link", feedLink, "title");
         } catch (RepositoryException e) {
             log.error("Problem while fetching feed title for the main planet feed: " + e.getMessage());
         }
         return null;
     }
 
 }