/**
    * 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.vaadin.gwt.client.layout.lazylayout.connector;
  
  import info.magnolia.ui.vaadin.gwt.client.layout.lazylayout.rpc.LazyLayoutServerRpc;
  import info.magnolia.ui.vaadin.gwt.client.layout.lazylayout.shared.ThumbnailData;
  import info.magnolia.ui.vaadin.gwt.client.layout.lazylayout.widget.EscalatorCardsPanel;
  import info.magnolia.ui.vaadin.gwt.client.layout.lazylayout.widget.EscalatorPanel;
  import info.magnolia.ui.vaadin.gwt.shared.Range;
  import info.magnolia.ui.vaadin.layout.LazyCardLayout;
  
  import com.google.gwt.user.client.Timer;
  import com.vaadin.client.communication.RpcProxy;
  import com.vaadin.shared.ui.Connect;
  
  /**
   * Sub implementaton of {@link LazyLayoutConnector} for cards, aka the 6.0 UI.
   *
   * TODO: as soon as 5.x UI support is dropped, this should be merged back with {@link LazyLayoutConnector}.
   */
  @Connect(LazyCardLayout.class)
  public class LazyCardLayoutConnector extends LazyLayoutConnector implements EscalatorCardsPanel.Listener {
  
      private final LazyLayoutServerRpc rpc = RpcProxy.create(LazyLayoutServerRpc.class, this);
  
      private Timer timer = new Timer() {
          @Override
          public void run() {
              serveThumbnails();
          }
      };
  
      protected EscalatorPanel createWidget() {
          final EscalatorCardsPanel layout = new EscalatorCardsPanel(this);
          layout.setThumbnailService(new ThumbnailService() {
              @Override
              public void onViewportChanged(final Range requestedRange) {
                  timer.schedule(THUMBNAIL_QUERY_RPC_DELAY);
                  updateSelection();
              }
  
              @Override
              public void onThumbnailsScaled(float ratio) {
                  rpc.setScaleRatio(ratio);
              }
          });
          return layout;
      }
  
      @Override
      void updateThumbnailContentAtIndex(int thumbnailAbsoluteIndex) {
          final ThumbnailData thumbnailData = indexToThumbnail.get(thumbnailAbsoluteIndex);
          getWidget().updateImageSource(idToUrl.get(thumbnailData.getThumbnailId()), thumbnailAbsoluteIndex);
          ((EscalatorCardsPanel) getWidget()).updateImageCaption(thumbnailData.getCaption(), thumbnailAbsoluteIndex);
      }
  
      @Override
      LazyLayoutServerRpc getLazyLayoutServerRpc() {
          return rpc;
      }
  
      @Override
      public void onThumbnailClicked(int index, boolean isMetaKeyPressed, boolean isShiftKeyPressed) {
          rpc.onElementsSelected(index, isMetaKeyPressed, isShiftKeyPressed);
      }
  
      @Override
      public void onThumbnailRightClicked(int index, int xPos, int yPos) {
         rpc.onElementRightClicked(index, xPos, yPos);
     }
 
     @Override
     public void onThumbnailDoubleClicked(int index) {
         rpc.onElementDoubleClicked(index);
     }
 
     void cancelTimer() {
         timer.cancel();
     }
 }