/**
    * 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.admincentral.apps.notifications;
  
  import info.magnolia.ui.api.message.Message;
  import info.magnolia.ui.field.FieldDefinition;
  import info.magnolia.ui.datasource.PropertySetFactory;
  
  import java.util.Collection;
  import java.util.Locale;
  import java.util.Map;
  import java.util.Optional;
  import java.util.stream.Stream;
  
  import org.apache.commons.lang3.StringUtils;
  
  import com.vaadin.data.BeanPropertySet;
  import com.vaadin.data.PropertyDefinition;
  import com.vaadin.data.PropertySet;
  import com.vaadin.data.ValueProvider;
  import com.vaadin.server.Setter;
  
  import lombok.AllArgsConstructor;
  
  /**
   * Extract property set from {@link Message}, could be improved.
   */
  public class NotificationPropertySetFactory implements PropertySetFactory<Message> {
  
      @Override
      public PropertySet<Message> withProperties(Map<String, Class> properties) {
          return BeanPropertySet.get(Message.class);
      }
  
      @Override
      public PropertySet<Message> fromFieldDefinitions(Collection<FieldDefinition> fieldDefinitions, Locale locale) {
          return new PropertySet<Message>() {
              private final PropertySet<Message> propertySet = BeanPropertySet.get(Message.class);
  
              @Override
              public Stream<PropertyDefinition<Message, ?>> getProperties() {
                  return fieldDefinitions.stream().map(editorPropertyDefinition -> new MessagePropertyDefinition(propertySet, editorPropertyDefinition.getName()));
              }
  
              @Override
              public Optional<PropertyDefinition<Message, ?>> getProperty(String name) {
                  return getProperties().filter(messagePropertyDefinition -> messagePropertyDefinition.getName().equals(name)).findFirst();
              }
          };
      }
  
      @AllArgsConstructor
      private class MessagePropertyDefinition implements PropertyDefinition<Message, Object> {
          private PropertySet<Message> propertySet;
          private String name;
  
          @Override
          public ValueProvider<Message, Object> getGetter() {
              return message -> propertySet.getProperty(name)
                      .map(PropertyDefinition::getGetter)
                      .map(messageValueProvider -> messageValueProvider.apply(message))
                      .map(String::valueOf)
                      .orElseGet(() -> message.hasProperty(name) ? String.valueOf(message.getProperty(name)) : StringUtils.EMPTY);
          }
  
  
          @Override
          public Optional<Setter<Message, Object>> getSetter() {
             return Optional.empty();
         }
 
         @Override
         public Class<Object> getType() {
             return Object.class;
         }
 
         public Class<?> getPropertyHolderType() {
             return Message.class;
         }
 
         @Override
         public String getName() {
             return name;
         }
 
         @Override
         public PropertySet<Message> getPropertySet() {
             return propertySet;
         }
 
         @Override
         public String getCaption() {
             return name.toUpperCase();
         }
 
     }
 }