/**
    * 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.ui.databinding;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Optional;
  import java.util.stream.Stream;
  
  import javax.jcr.Item;
  import javax.jcr.Node;
  
  import com.vaadin.data.PropertyDefinition;
  import com.vaadin.data.PropertySet;
  import com.vaadin.data.ValueProvider;
  import com.vaadin.server.Setter;
  
  import lombok.Builder;
  import lombok.Data;
  
  
  /**
   * Describes a set of JCR properties that can be used for configuration based on
   * {@link JcrPropertyDescriptor}. Supports both JCR nodes and properties.
   *
   * In order to not clutter this class logic, the actual interaction with JCR items is
   * delegated to {@link JcrItemInteractionStrategy} (provides separate implementation
   * for nodes and properties).
   */
  public class JcrItemPropertySet implements PropertySet<Item> {
  
      /**
       * Jcr property descriptor.
       * @param <T>
       */
      @Builder
      @Data
      public static class JcrPropertyDescriptor<T> {
          private final Class<T> type;
          private final String name;
      }
  
      private List<PropertyDefinition<Item, ?>> knownProperties = new ArrayList<>();
  
      public JcrItemPropertySet(List<JcrPropertyDescriptor> knownProperties) {
          //noinspection unchecked
          knownProperties.forEach(property -> this.knownProperties.add(new JcrItemPropertyDefinition<>(this, property)));
      }
  
      @Override
      public Stream<PropertyDefinition<Item, ?>> getProperties() {
          return knownProperties.stream();
      }
  
      @Override
      public Optional<PropertyDefinition<Item, ?>> getProperty(String name) {
          return knownProperties.stream()
                  .filter(def -> def.getName().equals(name))
                  .findFirst();
      }
  
      private final class JcrItemPropertyDefinition<V> implements PropertyDefinition<Item, V> {
  
          private final PropertySet<Item> propertySet;
          private final JcrItemPropertySet.JcrPropertyDescriptor<V> descriptor;
  
          private JcrItemPropertyDefinition(PropertySet<Item> propertySet, JcrPropertyDescriptor<V> descriptor) {
              this.propertySet = propertySet;
             this.descriptor = descriptor;
         }
 
         @Override
         public ValueProvider<Item, V> getGetter() {
             return item -> JcrItemInteractionStrategy.get(item).get(item, descriptor);
         }
 
         @Override
         public Optional<Setter<Item, V>> getSetter() {
             return Optional.of((Setter<Item, V>) (Item item, V value) -> JcrItemInteractionStrategy.get(item).set(item, value, descriptor));
         }
 
         @Override
         public Class<V> getType() {
             return descriptor.getType();
         }
 
         @Override
         public Class<?> getPropertyHolderType() {
             return Node.class;
         }
 
         @Override
         public String getName() {
             return descriptor.getName();
         }
 
         @Override
         public String getCaption() {
             return descriptor.getName();
         }
 
         @Override
         public PropertySet<Item> getPropertySet() {
             return propertySet;
         }
 
 
     }
 }