/**
    * This file Copyright (c) 2013-2015 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.editor.dom;
  
  import info.magnolia.cms.security.operations.OperationPermissionDefinition;
  import info.magnolia.rendering.template.AreaDefinition;
  import info.magnolia.ui.vaadin.gwt.client.editor.event.EditAreaEvent;
  import info.magnolia.ui.vaadin.gwt.client.editor.event.NewAreaEvent;
  import info.magnolia.ui.vaadin.gwt.client.editor.event.NewComponentEvent;
  import info.magnolia.ui.vaadin.gwt.client.shared.AreaElement;
  import info.magnolia.ui.vaadin.gwt.client.widget.controlbar.AreaEndBar;
  import info.magnolia.ui.vaadin.gwt.client.widget.controlbar.ComponentPlaceHolder;
  import info.magnolia.ui.vaadin.gwt.client.widget.controlbar.listener.AreaListener;
  
  import com.google.gwt.dom.client.Element;
  import com.google.gwt.event.shared.EventBus;
  
  /**
   * Represents an area inside the {@link CmsNode}-tree.
   * An area can have 3 widgets associated with it:
   *
   * <pre>
   *   <ul>
   *     <li>{@link info.magnolia.ui.vaadin.gwt.client.widget.controlbar.AreaBar}</li>
   *     <li>{@link AreaEndBar}</li>
   *     <li>{@link ComponentPlaceHolder}</li>
   *   </ul>
   * </pre>
   *
   * Implements a listener interface for the {@link info.magnolia.ui.vaadin.gwt.client.widget.controlbar.AreaBar} and {@link ComponentPlaceHolder}.
   * Provides wrapper functions used by the {@link info.magnolia.ui.vaadin.gwt.client.editor.model.focus.FocusModel}.
   */
  public class MgnlArea extends MgnlElement implements AreaListener {
  
      public static final String EDITOR_INIT_CLASS_NAME = "init";
      private AreaEndBar areaEndBar;
      private ComponentPlaceHolder componentPlaceHolder;
      private Element componentMarkerElement;
      private EventBus eventBus;
  
      /**
       * MgnlElement. Represents a node in the tree built on cms-tags.
       */
      public MgnlArea(MgnlElement parent, EventBus eventBus) {
          super(parent);
          this.eventBus = eventBus;
      }
  
      private AreaEndBar getAreaEndBar() {
          return areaEndBar;
      }
  
      public void setAreaEndBar(AreaEndBar areaEndBar) {
          this.areaEndBar = areaEndBar;
      }
  
      private ComponentPlaceHolder getComponentPlaceHolder() {
          return componentPlaceHolder;
      }
  
      public void setComponentPlaceHolder(ComponentPlaceHolder componentPlaceHolder) {
          this.componentPlaceHolder = componentPlaceHolder;
      }
  
      public void setComponentMarkerElement(Element componentElement) {
          this.componentMarkerElement = componentElement;
      }
  
     public Element getComponentMarkerElement() {
         return componentMarkerElement;
     }
 
     @Override
     public AreaElement getTypedElement() {
         String availableComponents = getAttribute("availableComponents");
         AreaElement area = new AreaElement(getAttribute("workspace"), getAttribute("path"), getAttribute("dialog"), availableComponents);
 
         boolean areaIsTypeSingle = "single".equals(getAttribute("type"));
         boolean areaHasChildComponents = getComponents().size() > 0;
         boolean optional = Boolean.parseBoolean(getAttribute("optional"));
         boolean created = Boolean.parseBoolean(getAttribute("created"));
         boolean hasAvailableComponents = availableComponents != null && !availableComponents.isEmpty();
         boolean addible = true;
         if (getAttributes().containsKey(OperationPermissionDefinition.ADDIBLE)) {
             addible = Boolean.parseBoolean(getAttribute(OperationPermissionDefinition.ADDIBLE));
         }
 
         area.setOptional(optional);
         area.setCreated(created);
         area.setAddible(addible && hasAvailableComponents && !(optional && !created) && !(areaIsTypeSingle && areaHasChildComponents) && !isMaxComponentsReached());
 
         return area;
     }
 
     private boolean isMaxComponentsReached() {
         boolean showAddButton = Boolean.parseBoolean(getAttribute("showAddButton"));
         boolean showNewComponentArea = Boolean.parseBoolean(getAttribute("showNewComponentArea"));
 
         return showNewComponentArea && !showAddButton;
     }
 
     @Override
     public void createOptionalArea() {
         eventBus.fireEvent(new NewAreaEvent(getTypedElement()));
     }
 
     @Override
     public void editArea() {
         eventBus.fireEvent(new EditAreaEvent(getTypedElement()));
     }
 
     @Override
     public void createNewComponent() {
         eventBus.fireEvent(new NewComponentEvent(getTypedElement()));
     }
 
     @Override
     public boolean hasAddButton() {
         boolean optional = Boolean.parseBoolean(getAttribute("optional"));
         boolean created = Boolean.parseBoolean(getAttribute("created"));
 
         return optional && !created;
     }
 
     @Override
     public boolean hasEditButton() {
         boolean optional = Boolean.parseBoolean(getAttribute("optional"));
         boolean created = Boolean.parseBoolean(getAttribute("created"));
         boolean dialog = null != getAttribute("dialog");
 
         if (dialog) {
             // do not show edit-icon if the area has not been created
             if (!optional || (optional && created)) {
                 return true;
             }
         }
         return false;
     }
 
     @Override
     public boolean hasAddComponentButton() {
         return Boolean.parseBoolean(getAttribute("showAddButton"));
     }
 
     @Override
     public String getLabel() {
         String label = getAttribute("label");
         boolean optional = Boolean.parseBoolean(getAttribute("optional"));
         return label + ((optional) ? " (optional)" : "");
     }
 
     @Override
     public boolean isBoxPlaceHolder() {
         Element marker = getComponentMarkerElement();
         boolean onlyBar = (marker != null && marker.getAttribute(AreaDefinition.CMS_ADD).equals("bar"));
         return !onlyBar;
     }
 
     @Override
     public String getPlaceHolderLabel() {
         String label = getAttribute("label");
         String labelString;
 
         // if the add new component area should be visible
         if (isMaxComponentsReached()) { // maximum of components is reached - show add new component area with the maximum reached message, but without the ADD button
             labelString = "Maximum of components reached.";
         } else { // maximum of components is NOT reached - show add new component area with ADD button
             labelString = "New Component";
             if (label != null && !label.isEmpty()) {
                 labelString = "New" + " " + label + " " + "Component";
             }
         }
         return labelString;
     }
 
     public void removeFocus() {
         if (getControlBar() != null) {
             getControlBar().removeFocus();
         }
 
         if (getAreaEndBar() != null) {
             getAreaEndBar().removeFocus();
         }
     }
 
     public void setFocus(boolean child) {
         if (getControlBar() != null) {
             getControlBar().setFocus(child);
         }
         if (getAreaEndBar() != null) {
             getAreaEndBar().setFocus(child);
         }
     }
 
     public void setVisible(boolean visible) {
         if (getControlBar() != null) {
             getControlBar().setVisible(visible);
         }
         if (getAreaEndBar() != null) {
             getAreaEndBar().setVisible(visible);
         }
     }
 
     public void setPlaceHolderVisible(boolean visible) {
         if (getComponentPlaceHolder() != null) {
             getComponentPlaceHolder().setVisible(visible);
         }
     }
 
     public void toggleInitFocus(boolean visible) {
         if (visible) {
             getControlBar().addStyleName(EDITOR_INIT_CLASS_NAME);
             getAreaEndBar().addStyleName(EDITOR_INIT_CLASS_NAME);
             getAreaEndBar().addStyleName(EDITOR_INIT_CLASS_NAME);
         } else {
             getControlBar().removeStyleName(EDITOR_INIT_CLASS_NAME);
             getAreaEndBar().removeStyleName(EDITOR_INIT_CLASS_NAME);
         }
     }
 
     public void onDragStart(boolean isDrag) {
         if (getComponentPlaceHolder() != null) {
             getComponentPlaceHolder().setStyleName("moveOngoing", isDrag);
         }
     }
 }