/**
    * 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.cms.core.Content;
  import info.magnolia.cms.core.search.Query;
  import info.magnolia.cms.core.search.QueryManager;
  import info.magnolia.cms.core.search.QueryResult;
  import info.magnolia.cms.util.ContentWrapper;
  import info.magnolia.cms.util.NodeMapWrapper;
  import info.magnolia.context.MgnlContext;
  import info.magnolia.jcr.util.NodeTypes;
  import info.magnolia.jcr.util.PropertyUtil;
  import info.magnolia.jcr.util.SessionUtil;
  import info.magnolia.module.rssaggregator.RSSAggregatorConstants;
  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.List;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  /**
   * FeedStatisticsModel.
   *
   * @param <RD> Definition type.
   * @author lfischer
   */
  public class FeedStatisticsModel<RD extends TemplateDefinition> extends AbstractFeedModel<TemplateDefinition> {
  
      private static final String DEFAULT_STATISTIC = "authors";
  
      public FeedStatisticsModel(Node content, RD definition, RenderingModel<?> parent, TemplatingFunctions templatingFunctions) {
          super(content, definition, parent, templatingFunctions);
      }
  
      @Override
      public String execute() {
          return super.execute();
      }
  
      private String getStatistic() {
          String statistic = DEFAULT_STATISTIC;
  
          try {
              if (content.hasProperty("statistic")) {
                  statistic = content.getProperty("statistic").getString();
              }
          } catch (RepositoryException e) {
              log.error("Problem while getting statistic type: " + e.getMessage());
          }
          return statistic;
      }
  
      // TODO REFACTORING - USE NEW STYLE
      public Collection<ContentWrapper> getItems() {
  
          String statistic = getStatistic();
          int maxResults = MAX_RESULTS;
  
          List<ContentWrapper> results = new ArrayList<ContentWrapper>();
          try {
              if (content.hasProperty("maxResults")) {
                  maxResults = (int) content.getProperty("maxResults").getLong();
             }
             QueryManager qm = MgnlContext.getQueryManager(RSSAggregatorConstants.WORKSPACE);
             String feedName = PropertyUtil.getString(content, "feed");
             String query = "/" + feedName + "/statistics/" + statistic + "/* order by @postCount descending";
 
             log.debug(query);
             Query q = qm.createQuery(query, "xpath");
             QueryResult res = q.execute();
             Collection<Content> col = res.getContent(NodeTypes.Content.NAME);
             int resCount = 0;
             for (Content c : col) {
                 resCount++;
                 if (resCount <= maxResults) {
                     results.add(new NodeMapWrapper(c, c.getHandle()));
                 } else {
                     break;
                 }
             }
             log.debug("returning collection with {} items.", "" + results.size());
             return results;
         } catch (RepositoryException e) {
             log.error(e.getLocalizedMessage(), e);
         }
         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 {
             if (content.hasProperty("feed")) {
                 Node rssParent = SessionUtil.getNodeByIdentifier(RSSAggregatorConstants.WORKSPACE, content.getProperty("feed").getString());
                 return getFeedProperty(rssParent, FEEDS_NODE, "link", feedLink, "title");
             }
         } catch (RepositoryException e) {
             log.error("Problem while fetching feed title for statistics: " + e.getMessage());
         }
         return null;
     }
 
 }