/**
    * 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 static java.util.stream.Collectors.toMap;
  
  import info.magnolia.ui.contentapp.configuration.column.ColumnDefinition;
  import info.magnolia.ui.field.FieldDefinition;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  import java.util.Map;
  import java.util.Optional;
  import java.util.function.Function;
  import java.util.stream.Collectors;
  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> {
  
  
      public static PropertySet<Item> withProperties(Map<String, Class> properties) {
          final List<JcrItemPropertySet.JcrPropertyDescriptor> propertyDescriptors = properties.entrySet().stream()
                  .map(entry -> JcrItemPropertySet.JcrPropertyDescriptor.builder()
                          .type(entry.getValue())
                          .name(entry.getKey())
                          .build())
                  .collect(Collectors.toList());
  
          return new JcrItemPropertySet(propertyDescriptors);
      }
  
      public static <T> PropertySet<Item> fromColumns(List<ColumnDefinition<T>> columnDefinitions) {
          return withProperties(columnDefinitions.stream().collect(toMap(ColumnDefinition::getName, ColumnDefinition::getType)));
      }
  
      public static PropertySet<Item> fromFieldDefinitions(Collection<FieldDefinition> fieldDefinitions, Function<FieldDefinition, String> propertyNameTransformer) {
          //noinspection unchecked
          return new JcrItemPropertySet(fieldDefinitions.stream()
                  .map(fieldDefinition -> JcrItemPropertySet.JcrPropertyDescriptor
                          .builder()
                          .name(propertyNameTransformer.apply(fieldDefinition))
                          .type(fieldDefinition.getType())
                          .build())
                  .collect(Collectors.toList()));
      }
  
      /**
      * 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 Optional.of(knownProperties.stream()
                 .filter(def -> def.getName().equals(name))
                 .findFirst()
                 .orElse(new JcrItemPropertyDefinition<>(this, JcrItemPropertySet.JcrPropertyDescriptor.builder()
                         .type(Object.class)
                         .name(name)
                         .build())
                 )
         );
     }
 
     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;
         }
 
 
     }
 }