/**
    * This file Copyright (c) 2013 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.module.mail.app.field.transformer;
  
  import info.magnolia.ui.form.field.definition.CompositeFieldDefinition;
  import info.magnolia.ui.form.field.definition.ConfiguredFieldDefinition;
  import info.magnolia.ui.form.field.definition.SwitchableFieldDefinition;
  import info.magnolia.ui.form.field.transformer.basic.BasicTransformer;
  import info.magnolia.ui.vaadin.integration.jcr.DefaultProperty;
  
  import java.util.Iterator;
  import java.util.List;
  
  import com.vaadin.data.Item;
  import com.vaadin.data.Property;
  import com.vaadin.data.util.PropertysetItem;
  
  /**
   * Transformer for composite field to handle saving of user's name and password in smtp configuration.
   */
  public class MailSecurityTransformer extends BasicTransformer<PropertysetItem> {
  
      protected List<String> fieldsName;
      protected String compositeFieldName = "composite";
  
      public MailSecurityTransformer(Item relatedFormItem, ConfiguredFieldDefinition definition, Class<PropertysetItem> type, List<String> fieldsName) {
          super(relatedFormItem, definition, type);
          fieldsName.clear();
          List<ConfiguredFieldDefinition> fields = ((SwitchableFieldDefinition) definition).getFields();
          for (ConfiguredFieldDefinition field : fields) {
              if (field instanceof CompositeFieldDefinition) {
                  fieldsName.addAll(((CompositeFieldDefinition) field).getFieldsName());
              }
          }
          this.fieldsName = fieldsName;
      }
  
      @Override
      public void writeToItem(PropertysetItem newValues) {
          // Get iterator.
          Iterator<?> propertyNames = newValues.getItemPropertyIds().iterator();
  
          while (propertyNames.hasNext()) {
              String propertyName = (String) propertyNames.next();
              if (propertyName.equals(compositeFieldName)) {
                  PropertysetItem values = (PropertysetItem) newValues.getItemProperty(propertyName).getValue();
                  Iterator<?> names = values.getItemPropertyIds().iterator();
  
                  while (names.hasNext()) {
                      String name = (String) names.next();
                      Property<?> property = relatedFormItem.getItemProperty(name);
                      if (property == null) {
                          relatedFormItem.addItemProperty(name, values.getItemProperty(name));
                      }
                  }
              }
          }
  
          // This store the selected option
          String propertyName = definePropertyName();
          // Add the select property value (select property name == field name)
          if (newValues.getItemProperty(propertyName) != null) {
              relatedFormItem.addItemProperty(propertyName, newValues.getItemProperty(propertyName));
          }
      }
  
      @Override
      public PropertysetItem readFromItem() {
         PropertysetItem compositeFielNewValues = new PropertysetItem();
         for (String propertyName : fieldsName) {
             if (relatedFormItem.getItemProperty(propertyName) != null) {
                 compositeFielNewValues.addItemProperty(propertyName, relatedFormItem.getItemProperty(propertyName));
             }
         }
         // Switchable field wait a PropertysetItem (key = field name, value = field property).
         // In this case, the Switchable field do only have one field 'composite' that have a multiple values (PropertysetItem)
         PropertysetItem newValue = new PropertysetItem();
         newValue.addItemProperty(compositeFieldName, new DefaultProperty<PropertysetItem>(PropertysetItem.class, compositeFielNewValues));
 
         // This set the selected option
         String propertyName = definePropertyName();
         if (relatedFormItem.getItemProperty(propertyName) != null) {
             newValue.addItemProperty(propertyName, relatedFormItem.getItemProperty(propertyName));
         }
 
         return newValue;
     }
 }