/**
    * This file Copyright (c) 2013-2017 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.factory;
  
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.jcr.util.SessionUtil;
  import info.magnolia.module.mail.app.field.definition.MailTemplateSelectFieldDefinition;
  import info.magnolia.ui.form.field.definition.SelectFieldOptionDefinition;
  import info.magnolia.ui.form.field.factory.SelectFieldFactory;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.vaadin.v7.data.Item;
  import com.vaadin.v7.data.Property;
  
  /**
   * Field factory that loads mail templates into select option group in verify mail subapp.
   */
  public class MailTemplateSelectFieldFactory extends SelectFieldFactory<MailTemplateSelectFieldDefinition> {
  
      private static final Logger log = LoggerFactory.getLogger(MailTemplateSelectFieldFactory.class);
  
      private static final String MAIL_TEMPLATES_PATH = "/modules/mail/config/templatesConfiguration";
      private SelectFieldOptionDefinition firstField;
  
      public MailTemplateSelectFieldFactory(MailTemplateSelectFieldDefinition definition, Item relatedFieldItem) {
          super(definition, relatedFieldItem);
      }
  
      @Override
      public List<SelectFieldOptionDefinition> getSelectFieldOptionDefinition() {
          List<SelectFieldOptionDefinition> res = new ArrayList<>();
          Node templatesNode = SessionUtil.getNode("config", MAIL_TEMPLATES_PATH);
          if (templatesNode != null) {
              try {
                  boolean first = true;
                  Iterable<Node> templates = NodeUtil.getNodes(templatesNode, "mgnl:contentNode");
                  for (Node template : templates) {
                      SelectFieldOptionDefinition option = new SelectFieldOptionDefinition();
                      option.setValue(template.getPath());
                      option.setLabel(template.getName());
                      res.add(option);
                      if (first) {
                          this.firstField = option;
                          first = false;
                      }
                  }
              } catch (RepositoryException e) {
                  log.error("Unable to load mail templates.", e);
              }
          }
          return res;
      }
  
      @Override
      protected Object createDefaultValue(Property dataSource) {
          Object selectedValue = super.createDefaultValue(dataSource);
          if (selectedValue == null) {
              return firstField.getValue();
          }
          return selectedValue;
     }
 
 }