/**
    * This file Copyright (c) 2008-2012 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.dam.handlers;
  
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.core.HierarchyManager;
  import info.magnolia.cms.core.MgnlNodeType;
  import info.magnolia.cms.core.NodeData;
  import info.magnolia.context.MgnlContext;
  import info.magnolia.dam.asset.Asset;
  import info.magnolia.dam.asset.AssetNotFoundException;
  import info.magnolia.dam.asset.DamException;
  import info.magnolia.module.templatingkit.dam.assets.AssetWithOverridingMetaData;
  import info.magnolia.module.templatingkit.dam.assets.DMSAsset;
  import info.magnolia.module.templatingkit.dam.assets.MetaDataOnlyAsset;
  import info.magnolia.templating.functions.TemplatingFunctions;
  
  import javax.inject.Inject;
  import javax.jcr.ItemNotFoundException;
  import javax.jcr.RepositoryException;
  
  /**
   * DMS DAM Handler.
   * @author tmiyar
   * @version $Id$
   */
  public class DMSDAMHandler extends AbstractInternalContentDAMHandler {
  
  
      private final TemplatingFunctions templatingFunctions;
  
      @Inject
      public DMSDAMHandler(TemplatingFunctions templatingFunctions){
          this.templatingFunctions = templatingFunctions;
      }
  
      @Override
      public Asset getAsset(Content node, String nodeDataPrefix) throws DamException {
          final Asset asset = getAssetByKey(getKey(node, nodeDataPrefix));
          try {
              return new AssetWithOverridingMetaData(asset, new MetaDataOnlyAsset(node, nodeDataPrefix, templatingFunctions));
          }
          catch (RepositoryException e) {
              throw new DamException("Can't read meta data from content for [" + asset + "]", e);
          }
      }
  
      @Override
      public Asset getAssetByKey(String key) throws AssetNotFoundException, DamException{
          
          final HierarchyManager hm = MgnlContext.getHierarchyManager("dam");
          try {
              try {
                  Content node = hm.getContentByUUID(key);
                  if(node.hasMixin(MgnlNodeType.MIX_DELETED)){
                      throw new AssetNotFoundException("Asset with key [" + key + "] is marked as deleted");
                  }
                  final NodeData binaryNodeData = node.getNodeData("jcr:content");
                  return new DMSAsset(this, node, binaryNodeData, templatingFunctions);
              }
              catch (ItemNotFoundException e) {
                  throw new AssetNotFoundException("No asset found for key [" + key + "]");
              }
          }
          catch (RepositoryException e) {
              throw new DamException("Can't create asset for key " + key, e);
          }
      }
 
     protected String getKey(Content node, String nodeDataPrefix) throws AssetNotFoundException, DamException {
         final String name = getNodeDataName(node, nodeDataPrefix);
         final NodeData nodeData = node.getNodeData(name);
         if(!nodeData.isExist()){
             throw new AssetNotFoundException("Can't find asset for " + node.getHandle() + "/" + nodeDataPrefix);
         }
         return nodeData.getString();
     }
 
 }