/**
    * 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;
  
  import info.magnolia.i18nsystem.SimpleTranslator;
  
  import org.apache.commons.lang3.ObjectUtils;
  
  import com.vaadin.ui.CustomComponent;
  import com.vaadin.ui.FormLayout;
  import com.vaadin.ui.Label;
  import com.vaadin.ui.VerticalLayout;
  
  /**
   * The component displaying additional details about uploaded files.
   *
   * TODO incorporate more seamlessly into the {@link UploadField}.
   */
  public class UploadFieldDetailComponent extends CustomComponent {
  
      private final Label fileName;
      private final Label fileSize;
      private final Label fileFormat;
      private VerticalLayout rootLayout;
  
  
      public UploadFieldDetailComponent(SimpleTranslator i18n) {
  
          this.rootLayout = new VerticalLayout();
          this.rootLayout.setMargin(false);
          setCompositionRoot(rootLayout);
  
          fileName = new Label();
          fileName.setCaption(i18n.translate("fields.uploadField.detail.filename.label"));
  
          fileSize = new Label();
          fileSize.setCaption(i18n.translate("fields.uploadField.detail.filesize.label"));
  
          fileFormat = new Label();
          fileFormat.setCaption(i18n.translate("fields.uploadField.detail.fileformat.label"));
  
          FormLayout fileInfo = new FormLayout();
          fileInfo.setSizeUndefined();
          fileInfo.addStyleName("file-details");
          fileInfo.addComponents(fileName, fileSize, fileFormat);
          rootLayout.addComponent(fileInfo);
      }
  
      public void updateFileDetail(UploadField.FileInfo info) {
          if (ObjectUtils.anyNotNull(fileName, fileSize, fileFormat)) {
              this.fileName.setValue(info.getName());
              this.fileSize.setValue(getFormattedSizeInfo(info));
              this.fileFormat.setValue(info.getMimeType());
              refreshRootLayout();
          } else {
              clearRootLayout();
          }
  
      }
  
      protected void clearRootLayout() {
          this.rootLayout.setVisible(false);
          removeStyleName("done");
      }
  
      protected void refreshRootLayout() {
          this.rootLayout.setVisible(true);
          addStyleName("done");
     }
 
     private String getFormattedSizeInfo(UploadField.FileInfo info) {
         long sizeInKb = info.getSizeInBytes() / 1024;
         return info.getImageInfo()
                 .map(imageInfo -> String.format("%s x %s px, %s KB", imageInfo.getWidth(), imageInfo.getHeight(), sizeInKb))
                 .orElseGet(() -> String.format("%s KB", sizeInKb));
     }
 
 }