/**
    * This file Copyright (c) 2011 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.templating.editor.client.widget.dnd;
  
  import static info.magnolia.templating.editor.client.jsni.JavascriptUtils.moveComponent;
  
  import com.google.gwt.dom.client.Element;
  
  
  import info.magnolia.templating.editor.client.PageEditor;
  import info.magnolia.templating.editor.client.dom.MgnlElement;
  import info.magnolia.templating.editor.client.widget.controlbar.ComponentBar;
  import info.magnolia.templating.editor.client.widget.placeholder.ComponentPlaceHolder;
  
  /**
   * DragAndDropLegacy. GWT port of legacy /magnolia-module-admininterface/src/main/resources/mgnl-resources/admin-js/inline.js
   */
  public class LegacyDragAndDrop {
  
      public static ComponentBar sourceBar;
      private static MoveWidget moveDiv;
  
      public static void moveComponentStart(ComponentBar bar) {
              toggleStyles(bar, true);
  
              // reset native drag and drop
              bar.setDraggable(false);
              MgnlElement area = bar.getMgnlElement().getParentArea();
              if (area != null) {
                  for (MgnlElement component : area.getComponents()) {
                      ComponentBar componentBar = (ComponentBar) PageEditor.model.getEditBar(component);
                      if (componentBar != null && componentBar != bar) {
                          componentBar.setDraggable(false);
                      }
                  }
              }
              sourceBar = bar;
              int height =bar.getOffsetHeight();
              int width = bar.getOffsetWidth();
              moveDiv = new MoveWidget(height, width);
      }
  
      public static void moveComponentOver(ComponentBar bar) {
          if (isMoving()) {
              String idSource = sourceBar.getNodeName();
  
              if (!bar.getNodeName().equals(idSource)){
                  bar.setStyleName("moveOver", true);
              }
          }
      }
  
      public static void moveComponentOut(ComponentBar bar) {
          if (isMoving()) {
              String idSource = sourceBar.getNodeName();
  
              if (!bar.getNodeName().equals(idSource)){
                  bar.setStyleName("moveOver", false);
              }
          }
      }
  
      public static void moveComponentEnd(ComponentBar bar) {
          if (isMoving()) {
  
              String idSource = sourceBar.getNodeName();
  
              if (!bar.getNodeName().equals(idSource)) {
                 int xTarget = bar.getAbsoluteLeft();
                 int yTarget = bar.getAbsoluteTop();
                 int xOrigin = sourceBar.getAbsoluteLeft();
                 int yOrigin = sourceBar.getAbsoluteTop();
 
                 boolean isDragUp = yOrigin > yTarget;
                 boolean isDragDown = !isDragUp;
                 boolean isDragLeft = xOrigin > xTarget;
                 boolean isDragRight = !isDragLeft;
 
                 String order = null;
 
                 if(isDragUp || isDragLeft) {
                     order = "before";
                 } else if(isDragDown || isDragRight) {
                     order = "after";
                 }
                 String parentPath = bar.getPath().substring(0, bar.getPath().lastIndexOf("/"));
                 moveComponent(bar.getNodeName(), idSource, parentPath, order);
             }
         }
     }
 
     public static void moveComponentReset() {
         if (isMoving()) {
             toggleStyles(sourceBar, false);
 
             // reset native drag and drop
             sourceBar.setDraggable(true);
             MgnlElement area = sourceBar.getMgnlElement().getParentArea();
             if (area != null) {
                 for (MgnlElement component : area.getComponents()) {
                     ComponentBar componentBar = (ComponentBar) PageEditor.model.getEditBar(component);
                     if (componentBar != null && componentBar != sourceBar) {
                         componentBar.setDraggable(false);
                     }
                 }
             }
 
             sourceBar = null;
             moveDiv.detach();
         }
     }
 
     private static void toggleStyles(ComponentBar bar, boolean isMove) {
         bar.toggleButtons(!isMove);
 
         bar.setStyleName("moveSource", isMove);
 
         MgnlElement area = bar.getMgnlElement().getParentArea();
         if (area != null) {
             for (MgnlElement component : area.getComponents()) {
                 ComponentBar componentBar = (ComponentBar) PageEditor.model.getEditBar(component);
                 if (componentBar != null && componentBar != bar) {
                     componentBar.setStyleName("moveTarget", isMove);
 
                     componentBar.getElement().setDraggable(Element.DRAGGABLE_TRUE);
 
                 }
             }
             ComponentPlaceHolder placeholder = PageEditor.model.getComponentPlaceHolder(area);
             if (placeholder != null) {
                 placeholder.setStyleName("moveOngoing", isMove);
             }
         }
     }
 
     public static boolean isMoving() {
         return (sourceBar != null) ? true : false;
     }
 }