/**
    * This file Copyright (c) 2010-2011 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.placeholder;
  
  
  import java.util.Map;
  
  import info.magnolia.rendering.template.AreaDefinition;
  import info.magnolia.templating.editor.client.PageEditor;
  import info.magnolia.templating.editor.client.dom.MgnlElement;
  
  import com.google.gwt.dom.client.Element;
  import com.google.gwt.dom.client.Node;
  import com.google.gwt.event.dom.client.ClickEvent;
  import com.google.gwt.event.dom.client.ClickHandler;
  import com.google.gwt.event.dom.client.MouseDownEvent;
  import com.google.gwt.event.dom.client.MouseDownHandler;
  import com.google.gwt.user.client.ui.FlowPanel;
  import com.google.gwt.user.client.ui.Label;
  import com.google.gwt.user.client.ui.PushButton;
  
  /**
   * A Widget for adding components to area.
   *
   * @version $Id$
   */
  public class ComponentPlaceHolder extends AbstractPlaceHolder {
  
      private boolean optional = false;
      private boolean created = false;
      private boolean showAddButton = false;
      private String availableComponents = "";
      private String type = "";
      private String areaWorkspace = "";
      private String areaPath = "";
      private String name = "";
      private FlowPanel buttonWrapper;
  
      public ComponentPlaceHolder(MgnlElement mgnlElement) throws IllegalArgumentException {
  
          super(mgnlElement);
  
          checkMandatories(mgnlElement.getAttributes());
  
          this.addStyleName("component");
  
          FlowPanel controlBar = new FlowPanel();
          controlBar.setStyleName("mgnlEditorBar");
          controlBar.addStyleName("placeholder");
  
          buttonWrapper = new FlowPanel();
          buttonWrapper.setStylePrimaryName("mgnlEditorBarButtons");
  
          controlBar.add(buttonWrapper);
  
          Label label = new Label("New Component");
          label.setStyleName("mgnlEditorBarLabel");
          controlBar.add(label);
  
          add(controlBar);
  
          Element marker = getMgnlElement().getComponentElement();
          boolean onlyBar = (marker != null && marker.getAttribute(AreaDefinition.CMS_ADD).equals("bar")) ? true: false;
  
          if (!onlyBar) {
              FlowPanel elementWrapper = new FlowPanel();
              elementWrapper.setStyleName("mgnlEditorPlaceholderElements");
              add(elementWrapper);
         }
 
         setVisible(false);
         createMouseEventsHandlers();
         createButtons();
         attach();
     }
 
     private void createMouseEventsHandlers() {
 
         if (this.showAddButton){
             addDomHandler(new MouseDownHandler() {
 
                 @Override
                 public void onMouseDown(MouseDownEvent event) {
                     PageEditor.addComponent(areaWorkspace, areaPath, null, availableComponents);
 
                 }
             }, MouseDownEvent.getType());
         }
     }
 
     private void createButtons() {
 
         if (this.showAddButton){
             PushButton button = new PushButton();
             button.setStylePrimaryName("mgnlEditorPushButton");
             button.addStyleName("add");
 
             button.addClickHandler(new ClickHandler() {
                 @Override
                 public void onClick(ClickEvent event) {
                     PageEditor.addComponent(areaWorkspace, areaPath, null, availableComponents);
                 }
             });
             buttonWrapper.add(button);
         }
     }
 
     public void attach() {
         Element parent = getMgnlElement().getComponentElement();
 
         if (parent == null) {
             if (getMgnlElement().getLastElement() != null && getMgnlElement().getFirstElement() == getMgnlElement().getLastElement()) {
                 attach(getMgnlElement());
             }
             else {
                 attach(getMgnlElement().getEndComment().getElement());
             }
         }
         else {
             parent.insertFirst(getElement());
         }
         onAttach();
         PageEditor.model.addComponentPlaceHolder(getMgnlElement(), this);
     }
 
     public void attach(MgnlElement mgnlElement) {
         Element element = mgnlElement.getFirstElement();
         if (element != null) {
             element.appendChild(getElement());
         }
     }
 
     public void attach(Element element) {
         final Node parentNode = element.getParentNode();
         parentNode.insertBefore(getElement(), element);
     }
 
     private void checkMandatories(Map<String, String> attributes) throws IllegalArgumentException {
 
         this.showAddButton = Boolean.parseBoolean(attributes.get("showAddButton"));
         this.optional = Boolean.parseBoolean(attributes.get("optional"));
         this.created = Boolean.parseBoolean(attributes.get("created"));
         this.type = attributes.get("type");
         this.name = attributes.get("name");
 
 
         String areaContent = attributes.get("content");
         int i = areaContent.indexOf(':');
         this.areaWorkspace = areaContent.substring(0, i);
         this.areaPath = areaContent.substring(i + 1);
 
         if(AreaDefinition.TYPE_NO_COMPONENT.equals(this.type)) {
             this.availableComponents = "";
         }
         else {
             this.availableComponents = attributes.get("availableComponents");
         }
 
         if (availableComponents.equals("")) {
             throw new IllegalArgumentException();
         }
 
         if (this.type.equals(AreaDefinition.TYPE_SINGLE) && !getMgnlElement().getComponents().isEmpty()) {
             throw new IllegalArgumentException();
         }
 
 
     }
 
 }