/**
    * This file Copyright (c) 2003-2018 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.form.field;
  
  import info.magnolia.context.MgnlContext;
  import info.magnolia.ui.imageprovider.ImageProvider;
  import info.magnolia.ui.vaadin.integration.jcr.JcrNodeAdapter;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.apache.commons.lang3.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.vaadin.server.ExternalResource;
  import com.vaadin.ui.Component;
  import com.vaadin.ui.Image;
  import com.vaadin.v7.shared.ui.label.ContentMode;
  import com.vaadin.v7.ui.CustomField;
  import com.vaadin.v7.ui.Field;
  import com.vaadin.v7.ui.HorizontalLayout;
  import com.vaadin.v7.ui.Label;
  
  /**
   * A base custom field comprising of a Thumbnail and related image information.
   * This Field is waiting for path Node value.
   */
  public class ThumbnailField extends CustomField<String> {
      private static final Logger log = LoggerFactory.getLogger(ThumbnailField.class);
      private HorizontalLayout layout;
      private Label label;
      protected Image embedded = new Image();
  
      private ImageProvider imageThumbnailProvider;
      private String workspace;
  
      private String currentIdentifier = "";
  
      public ThumbnailField(ImageProvider imageThumbnailProvider, String workspace) {
          this.imageThumbnailProvider = imageThumbnailProvider;
          this.workspace = workspace;
          this.layout = new HorizontalLayout();
  
          label = new Label("", ContentMode.HTML);
          label.addStyleName("thumbnail-info");
  
          addStyleName("thumbnail-field");
          setSizeUndefined();
  
      }
  
      @Override
      protected Component initContent() {
          layout.addComponent(label);
          layout.addComponent(embedded);
          return layout;
      }
  
      @Override
      public Class<String> getType() {
          return String.class;
      }
  
      /**
       * Create a value change listener in order to refresh the View.
       */
      public void ValueChangeListener(Field<?> field) {
         field.addValueChangeListener(new ValueChangeListener() {
             @Override
             public void valueChange(com.vaadin.v7.data.Property.ValueChangeEvent event) {
                 setLabelAndImage(event.getProperty().getValue().toString());
             }
         });
     }
 
     /**
      * Set the Label And Image.
      */
     public void setLabelAndImage(String nodePath) {
         try {
             if (StringUtils.isEmpty(nodePath)) {
                 return;
             }
             Node parentNode = MgnlContext.getJCRSession(workspace).getNode(nodePath);
             String uuid = parentNode.getIdentifier();
 
             if (!currentIdentifier.equals(uuid)) {
                 // Set Text info
                 label.setValue(createFieldDetail(parentNode));
                 // Set Thumbnail
                 String path = imageThumbnailProvider.getPortraitPath(new JcrNodeAdapter(parentNode));
                 if (layout.getComponentIndex(embedded) != -1) {
                     layout.removeComponent(embedded);
                 }
                 embedded = path != null ? new Image("", new ExternalResource(path)) : new Image(null);
                 layout.addComponent(embedded);
             }
         } catch (RepositoryException e) {
             log.warn("Not able to refresh the Thumbnail Field view for the following Node path: {}", nodePath, e);
         }
     }
 
     /**
      * Create a field detail displayed after the thumbnail.
      */
     public String createFieldDetail(Node parentNode) throws RepositoryException {
         return "";
     }
 }