/**
    * This file Copyright (c) 2014-2017 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.dam.jcr;
  
  import info.magnolia.dam.api.Asset;
  import info.magnolia.dam.api.metadata.AssetMetadata;
  import info.magnolia.dam.api.metadata.DublinCore;
  import info.magnolia.dam.api.metadata.MagnoliaAssetMetadata;
  import info.magnolia.jcr.RuntimeRepositoryException;
  import info.magnolia.jcr.util.NodeTypes;
  import info.magnolia.jcr.util.PropertyUtil;
  import info.magnolia.objectfactory.Components;
  
  import java.io.InputStream;
  import java.util.Calendar;
  
  import javax.jcr.Node;
  import javax.jcr.Property;
  import javax.jcr.RepositoryException;
  
  /**
   * JCR implementation of a {@link Asset} definition.
   */
  public class JcrAsset extends AbstractJcrItem implements Asset {
  
      public JcrAsset(JcrAssetProvider assetProvider, Node itemNode) {
          super(assetProvider, itemNode);
      }
  
      @Override
      public String getLink() {
          return getAssetProvider().getLink(this);
      }
  
      @Override
      public boolean isAsset() {
          return true;
      }
  
      @Override
      public String getTitle() {
          return PropertyUtil.getString(getNode(), AssetNodeTypes.Asset.TITLE, "");
      }
  
      @Override
      public String getSubject() {
          return getPropertyValue(getNode(), AssetNodeTypes.Asset.SUBJECT, "");
      }
  
      private String getPropertyValue(Node node, String propertyName, String defaultValue) {
          try {
              if (node.hasProperty(propertyName)) {
                  Property property = node.getProperty(propertyName);
                  if (property.isMultiple()) {
                      return property.getValues()[0].getString();
                  }
                  return property.getValue().getString();
              }
              return defaultValue;
          } catch (RepositoryException e) {
              throw new RuntimeRepositoryException(e);
          }
      }
  
      @Override
      public String getDescription() {
          return PropertyUtil.getString(getNode(), AssetNodeTypes.Asset.DESCRIPTION, "");
      }
 
     @Override
     public String getCaption() {
         return PropertyUtil.getString(getNode(), AssetNodeTypes.Asset.CAPTION, "");
     }
 
     @Override
     public String getLanguage() {
         return PropertyUtil.getString(getNode(), AssetNodeTypes.Asset.LANGUAGE, "");
     }
 
     @Override
     public String getCopyright() {
         return PropertyUtil.getString(getNode(), AssetNodeTypes.Asset.COPYRIGHT, "");
     }
 
     @Override
     public String getComment() {
         return PropertyUtil.getString(getNode(), AssetNodeTypes.Asset.COMMENT, "");
     }
 
     @Override
     public Calendar getCreated() {
         try {
             return NodeTypes.Created.getCreated(getNode());
         } catch (RepositoryException e) {
             throw new RuntimeRepositoryException(e);
         }
     }
 
     @Override
     public Calendar getLastModified() {
         try {
             return NodeTypes.LastModified.getLastModified(getNode());
         } catch (RepositoryException e) {
             throw new RuntimeRepositoryException(e);
         }
     }
 
     @Override
     public <M extends AssetMetadata> M getMetadata(Class<M> metaDataType) {
         if (!getAssetProvider().supports(metaDataType)) {
             throw new IllegalArgumentException("Unsupported metaData Type requested " + metaDataType != null ? metaDataType.getName() : "null");
         }
         return Components.newInstance(metaDataType, getNode(), getItemKey());
     }
 
     @Override
     public String getMimeType() {
         return PropertyUtil.getString(AssetNodeTypes.AssetResource.getResourceNodeFromAsset(getNode()), AssetNodeTypes.AssetResource.MIMETYPE, "");
     }
 
     @Override
     public long getFileSize() {
         return PropertyUtil.getLong(AssetNodeTypes.AssetResource.getResourceNodeFromAsset(getNode()), AssetNodeTypes.AssetResource.SIZE, 0l);
     }
 
     @Override
     public InputStream getContentStream() {
         try {
             Node node = AssetNodeTypes.AssetResource.getResourceNodeFromAsset(getNode());
             if (node != null) {
                 return node.getProperty(AssetNodeTypes.AssetResource.DATA).getBinary().getStream();
             }
         } catch (RepositoryException e) {
             throw new RuntimeRepositoryException(e);
         }
         return null;
     }
 
     @Override
     public String getFileName() {
         return PropertyUtil.getString(AssetNodeTypes.AssetResource.getResourceNodeFromAsset(getNode()), AssetNodeTypes.AssetResource.FILENAME, "");
     }
 
     /**
      * JcrAsset specific implementation that let you access a property value linked to an asset node.
      * This required an open session.
      * 
      * @return property value Object if the property exist or null otherwise.
      */
     public Object getProperty(String propertyName) {
         return PropertyUtil.getPropertyValueObject(getNode(), propertyName);
     }
 
     @Override
     public <M extends AssetMetadata> boolean supports(Class<M> metaDataType) {
         return (MagnoliaAssetMetadata.class.isAssignableFrom(metaDataType) || DublinCore.class.isAssignableFrom(metaDataType));
     }
 }