/**
    * This file Copyright (c) 2012-2013 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.actionbar;
  
  import info.magnolia.ui.actionbar.builder.ActionbarFactory;
  import info.magnolia.ui.actionbar.definition.ActionbarDefinition;
  import info.magnolia.ui.vaadin.actionbar.Actionbar;
  import info.magnolia.ui.vaadin.actionbar.ActionbarView;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.vaadin.server.Resource;
  
  /**
   * Default presenter for an action bar.
   */
  public class ActionbarPresenter implements ActionbarView.Listener {
  
      /**
       * Listener interface for the Actionbar.
       */
      public interface Listener {
  
          void onActionbarItemClicked(String itemName);
  
          String getLabel(String itemName);
  
          String getIcon(String itemName);
  
      }
  
      private static final Logger log = LoggerFactory.getLogger(ActionbarPresenter.class);
  
      private static final String PREVIEW_SECTION_NAME = "preview";
  
      private ActionbarDefinition definition;
  
      private ActionbarView actionbar;
  
      private Listener listener;
  
      public ActionbarPresenter() {
      }
  
      public void setListener(Listener listener) {
          this.listener = listener;
      }
  
      /**
       * Initializes an actionbar with given definition and returns the view for
       * parent to add it.
       */
      public ActionbarView start(final ActionbarDefinition definition) {
          this.definition = definition;
          actionbar = ActionbarFactory.build(definition, listener);
          actionbar.setListener(this);
          return actionbar;
      }
  
      public void setPreview(final Resource previewResource) {
          if (previewResource != null) {
              if (!((Actionbar) actionbar).getSections().containsKey(PREVIEW_SECTION_NAME)) {
                  actionbar.addSection(PREVIEW_SECTION_NAME, "Preview");
              }
              actionbar.setSectionPreview(previewResource, PREVIEW_SECTION_NAME);
          } else {
              if (((Actionbar) actionbar).getSections().containsKey(PREVIEW_SECTION_NAME)) {
                 actionbar.removeSection(PREVIEW_SECTION_NAME);
             }
         }
     }
 
     // METHODS DELEGATING TO THE VIEW
 
     public void enable(String... actionNames) {
         if (actionbar != null) {
             for (String action : actionNames) {
                 actionbar.setActionEnabled(action, true);
             }
         }
     }
 
     public void disable(String... actionNames) {
         if (actionbar != null) {
             for (String action : actionNames) {
                 actionbar.setActionEnabled(action, false);
             }
         }
     }
 
     public void enableGroup(String groupName) {
         if (actionbar != null) {
             actionbar.setGroupEnabled(groupName, true);
         }
     }
 
     public void disableGroup(String groupName) {
         if (actionbar != null) {
             actionbar.setGroupEnabled(groupName, false);
         }
     }
 
     public void enableGroup(String groupName, String sectionName) {
         if (actionbar != null) {
             actionbar.setGroupEnabled(groupName, sectionName, true);
         }
     }
 
     public void disableGroup(String groupName, String sectionName) {
         if (actionbar != null) {
             actionbar.setGroupEnabled(groupName, sectionName, false);
         }
     }
 
     public void showSection(String... sectionNames) {
         if (actionbar != null) {
             for (String section : sectionNames) {
                 actionbar.setSectionVisible(section, true);
             }
         }
     }
 
     public void hideSection(String... sectionNames) {
         if (actionbar != null) {
             for (String section : sectionNames) {
                 actionbar.setSectionVisible(section, false);
             }
         }
     }
 
     // VIEW LISTENER
 
     @Override
     public void onActionbarItemClicked(String actionToken) {
         String actionName = getActionName(actionToken);
         listener.onActionbarItemClicked(actionName);
     }
 
     private String getActionName(String actionToken) {
         final String[] chunks = actionToken.split(":");
         if (chunks.length != 2) {
             log.warn("Invalid actionToken [{}]: it is expected to be in the form sectionName:actionName. Action name cannot be resolved. Please check actionbar definition.", actionToken);
             return null;
         }
         final String sectionName = chunks[0];
         final String actionName = chunks[1];
 
         return actionName;
     }
 }