/**
    * This file Copyright (c) 2012-2014 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.ui.vaadin.integration.jcr;
  
  import info.magnolia.cms.core.Path;
  import info.magnolia.jcr.RuntimeRepositoryException;
  import info.magnolia.jcr.util.PropertyUtil;
  import info.magnolia.ui.api.ModelConstants;
  
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  
  import javax.jcr.Item;
  import javax.jcr.PropertyType;
  import javax.jcr.RepositoryException;
  import javax.jcr.Value;
  import javax.jcr.ValueFactory;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.vaadin.data.Property;
  
  /**
   * Represents a JCR property as a Vaadin data Item with three fixed properties for its name, type and value.
   */
  public class JcrPropertyAdapter extends AbstractJcrAdapter {
  
      public static final String VALUE_PROPERTY = "value";
  
      public static final String TYPE_PROPERTY = "type";
  
      public static final Set<String> PROPERTY_IDS = Collections.unmodifiableSet(new HashSet<String>() {{
          add(ModelConstants.JCR_NAME);
          add(TYPE_PROPERTY);
          add(VALUE_PROPERTY);
      }});
  
      private static final Logger log = LoggerFactory.getLogger(JcrPropertyAdapter.class);
  
      public JcrPropertyAdapter(javax.jcr.Property jcrProperty) {
          super(jcrProperty);
      }
  
      @Override
      public boolean isNode() {
          return false;
      }
  
      @Override
      public javax.jcr.Property getJcrItem() {
          return (javax.jcr.Property)super.getJcrItem();
      }
  
      @Override
      public javax.jcr.Property applyChanges() throws RepositoryException {
          javax.jcr.Property jcrItem = getJcrItem();
          super.updateProperties(jcrItem);
          // We fetch it again from the JCR session in case the name changed
          return getJcrItem();
      }
  
      @Override
      public Property getItemProperty(Object id) {
          if (getChangedProperties().containsKey(id)) {
              return getChangedProperties().get(id);
         }
         Object value;
         int type = PropertyType.STRING;
         try {
             javax.jcr.Property jcrProperty = getJcrItem();
             if (ModelConstants.JCR_NAME.equals(id)) {
                 value = jcrProperty.getName();
             } else if (VALUE_PROPERTY.equals(id)) {
                 value = PropertyUtil.getPropertyValueObject(jcrProperty.getParent(), String.valueOf(jcrProperty.getName()));
                 type = jcrProperty.getType();
             } else if (TYPE_PROPERTY.equals(id)) {
                 value = PropertyType.nameFromValue(jcrProperty.getType());
             } else {
                 return null;
             }
         } catch (RepositoryException re) {
             log.error("Could not get property for " + id, re);
             throw new RuntimeRepositoryException(re);
         }
 
         DefaultProperty property = new DefaultProperty(value.getClass(), value);
         getChangedProperties().put((String) id, property);
         return property;
     }
 
     @Override
     public Collection<?> getItemPropertyIds() {
         return PROPERTY_IDS;
     }
 
     /**
      * Updates one of the three supported properties or does nothing if the given propertyId is something else.
      */
     @Override
     protected void updateProperty(Item item, String propertyId, Property property) {
         if (!(item instanceof javax.jcr.Property)) {
             return;
         }
         javax.jcr.Property jcrProperty = (javax.jcr.Property) item;
 
         if (ModelConstants.JCR_NAME.equals(propertyId)) {
             String jcrName = (String) property.getValue();
             if (jcrName != null && !jcrName.isEmpty()) {
                 try {
                     if (!(jcrName.equals(jcrProperty.getName()))) {
 
                         // make sure new path is available
                         jcrName = Path.getUniqueLabel(jcrProperty.getSession(), jcrProperty.getParent().getPath(), jcrName);
 
                         // rename the node
                         javax.jcr.Property newProperty = PropertyUtil.renameProperty(jcrProperty, jcrName);
 
                         // update internal state
                         setItemId(JcrItemUtil.getItemId(newProperty));
                     }
                 } catch (RepositoryException e) {
                     log.error("Could not rename JCR property", e);
                 }
             }
         } else if (VALUE_PROPERTY.equals(propertyId)) {
             if (property.getValue() != null) {
                 try {
                     ValueFactory valueFactory = jcrProperty.getSession().getValueFactory();
 
                     Value newValue = PropertyUtil.createValue(property.getValue(), valueFactory);
                     jcrProperty.setValue(newValue);
                 } catch (RepositoryException e) {
                     log.error("Could not set JCR property", e);
                 }
             }
         } else if (TYPE_PROPERTY.equals(propertyId)) {
             if (property.getValue() != null) {
 
                 // get new type from string
                 int newType;
                 try {
                     newType = PropertyType.valueFromName(property.getValue().toString());
                 } catch (IllegalArgumentException e) {
                     log.warn("Could not set new type for JCR property, unknown type string", e);
                     return;
                 }
 
                 // set old value with new type
                 try {
                     String valueString = jcrProperty.getValue().getString();
                     ValueFactory valueFactory = jcrProperty.getSession().getValueFactory();
 
                     Value newValue = PropertyUtil.createValue(valueString, newType, valueFactory);
                     jcrProperty.setValue(newValue);
                 } catch (RepositoryException e) {
                     log.error("Could not set new type for JCR property", e);
                 }
             }
         }
     }
 
     @Override
     public boolean addItemProperty(Object id, Property property) {
         throw new UnsupportedOperationException("addItemProperty");
     }
 
     @Override
     public boolean removeItemProperty(Object id) throws UnsupportedOperationException {
         throw new UnsupportedOperationException("removeItemProperty");
     }
 
     @Override
     public boolean isNew() {
         return false;
     }
 }