/**
    * 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.field.factory;
  
  import info.magnolia.objectfactory.ComponentProvider;
  import info.magnolia.ui.field.LinkField;
  import info.magnolia.ui.field.LinkFieldDefinition;
  import info.magnolia.ui.form.ItemPreviewDefinition;
  import info.magnolia.ui.framework.component.ItemPreviewComponent;
  import info.magnolia.ui.framework.datasource.components.ItemResolver;
  import info.magnolia.ui.framework.overlay.ChooserController;
  import info.magnolia.ui.framework.overlay.ChooserController.ChooseResult;
  
  import java.util.Optional;
  
  import javax.inject.Inject;
  
  import com.vaadin.ui.Component;
  
  /**
   * Creates and initializes a {@link LinkField} field based on a {@link LinkFieldDefinition}.
   *
   * @param <D> the type of link field definition.
   */
  public class LinkFieldFactory<T, D extends LinkFieldDefinition<T>> extends AbstractFieldFactory<String, D> {
  
      private final ChooserController chooserController;
      private final ItemResolver<T> itemResolver;
  
      @Inject
      public LinkFieldFactory(D definition, ComponentProvider componentProvider, ItemResolver<T> itemResolver, ChooserController chooserController) {
          super(definition, componentProvider);
          this.itemResolver = itemResolver;
  
          if (definition.getChooser() == null) {
             throw new IllegalArgumentException("Could not find a chooser dialog definition at LinkField definition " + definition.getName());
          }
  
          this.chooserController = chooserController;
      }
  
      @Override
      protected Component createFieldComponent() {
          LinkFieldd.html#LinkField">LinkField linkField = new LinkField();
  
          Optional.ofNullable(getDefinition().getPlaceholder()).filter(p -> !isMessageKey(p)).ifPresent(linkField::setPlaceholder);
  
          linkField.setButtonCaptionNew(getDefinition().getButtonSelectNewLabel());
          linkField.setButtonCaptionOther(getDefinition().getButtonSelectOtherLabel());
          linkField.setEditable(getDefinition().isEditable());
          linkField.setDisableOnClick(true);
          linkField.addClickListener(event -> chooserController.openChooser(getDefinition().getChooser(), null)
                  .whenComplete((ChooseResult<T> result, Throwable err) -> {
  
                      linkField.setEnabled(true);
  
                      if (err != null) {
                          throw new RuntimeException(err);
                      }
  
                      result.getChoice()
                              .map(itemResolver::getPath)
                              .ifPresent(linkField::setValue);
                  }));
  
          newItemPreviewComponent().ifPresent(itemPreviewComponent -> {
              linkField.addValueChangeListener(event ->
                      itemResolver.getItemByPath(event.getValue()).ifPresent(item -> {
                         itemPreviewComponent.onValueChange(item);
                         itemPreviewComponent.setVisible(event.getValue() != null);
                     }));
             linkField.setContentPreview(itemPreviewComponent);
         });
 
         return linkField;
     }
 
     protected Optional<? extends ItemPreviewComponent<T>> newItemPreviewComponent() {
         return Optional.ofNullable(getDefinition().getPreview())
                 .map(ItemPreviewDefinition::getImplementationClass)
                 .map(clazz -> componentProvider.newInstance(clazz));
     }
 
 }