/**
    * This file Copyright (c) 2018 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.rest.delivery.jcr.i18n;
  
  import info.magnolia.cms.i18n.I18nContentSupport;
  import info.magnolia.i18nsystem.util.LocaleUtils;
  import info.magnolia.jcr.decoration.ContentDecoratorNodeWrapper;
  import info.magnolia.rest.delivery.jcr.decorator.AdditionNodeWrapper;
  import info.magnolia.rest.delivery.jcr.decorator.PlaceholderProperty;
  
  import java.util.List;
  import java.util.Locale;
  import java.util.stream.Collectors;
  
  import javax.jcr.Item;
  import javax.jcr.Node;
  import javax.jcr.NodeIterator;
  import javax.jcr.Property;
  import javax.jcr.PropertyIterator;
  import javax.jcr.RepositoryException;
  
  import org.apache.commons.lang3.StringUtils;
  import org.apache.jackrabbit.commons.iterator.NodeIteratorAdapter;
  import org.apache.jackrabbit.commons.iterator.PropertyIteratorAdapter;
  
  import com.google.common.collect.Lists;
  
  /**
   * A Node wrapper implementation which knows about i18n support and uses it to select child nodes and properties.
   */
  // TODO: Should extend from I18nNodeWrapper
  public class I18nDeliveryNodeWrapper extends ContentDecoratorNodeWrapper {
      private I18nContentSupport i18nSupport;
  
      public I18nDeliveryNodeWrapper(Node wrapped, I18nContentSupport i18nSupport) {
          super(wrapped, new I18nDeliveryContentDecorator(i18nSupport));
          this.i18nSupport = i18nSupport;
      }
  
      @Override
      public boolean hasProperty(String relPath) throws RepositoryException {
          return i18nSupport.hasProperty(getWrappedNode(), relPath);
      }
  
      @Override
      public Property getProperty(String relPath) throws RepositoryException {
          return wrapProperty(i18nSupport.getProperty(getWrappedNode(), relPath));
      }
  
      @Override
      public Node getNode(String relPath) throws RepositoryException {
          return wrapNode(i18nSupport.getNode(getWrappedNode(), relPath));
      }
  
      @Override
      public PropertyIterator getProperties() throws RepositoryException {
          List<Property> filtered = Lists.newArrayList(super.getProperties());
          List<Property> properties = filtered.stream()
                  .filter(property -> !containsLocaleInName(property))
                  .map(matchedProperty -> {
                      try {
                          return new PlaceholderProperty(i18nSupport.getProperty(getWrappedNode(), matchedProperty.getName()), getNameWithoutLocale(matchedProperty.getName()));
                      } catch (RepositoryException e) {
                          return matchedProperty;
                      }
                  })
                  .collect(Collectors.toList());
          return new PropertyIteratorAdapter(properties);
     }
 
     @Override
     public NodeIterator getNodes() throws RepositoryException {
         List<Node> filtered = Lists.newArrayList(super.getNodes());
         List<Node> nodes = filtered.stream()
                 .filter(node -> !containsLocaleInName(node))
                 .map(matchedNode -> {
                     try {
                         return new AdditionNodeWrapper(i18nSupport.getNode(getWrappedNode(), matchedNode.getName()), getNameWithoutLocale(matchedNode.getName()));
                     } catch (RepositoryException e) {
                         return matchedNode;
                     }
                 })
                 .collect(Collectors.toList());
 
         return wrapNodeIterator(new NodeIteratorAdapter(nodes));
     }
 
     private String getNameWithoutLocale(String name) {
         Locale detectedLocale = LocaleUtils.parseFromFilename(name, null);
         if (detectedLocale == null) {
             return name;
         }
         name = StringUtils.removeEnd(name, "_" + detectedLocale.toString());
         return name;
     }
 
     private boolean containsLocaleInName(Item item) {
         try {
             Locale validLocale = LocaleUtils.parseFromFilename(item.getName(), null);
             return validLocale != null;
         } catch (RepositoryException e) {
             // Should not happen.
             return false;
         }
     }
 }