/**
    * This file Copyright (c) 2010-2014 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.magnoliashell.viewport.connector;
  
  import info.magnolia.ui.vaadin.gwt.client.magnoliashell.event.AppRequestedEvent;
  import info.magnolia.ui.vaadin.gwt.client.magnoliashell.event.CurrentAppCloseEvent;
  import info.magnolia.ui.vaadin.gwt.client.magnoliashell.event.FullScreenEvent;
  import info.magnolia.ui.vaadin.gwt.client.magnoliashell.event.HideShellAppsEvent;
  import info.magnolia.ui.vaadin.gwt.client.magnoliashell.event.ActivateAppEvent;
  import info.magnolia.ui.vaadin.gwt.client.magnoliashell.event.ShellAppStartingEvent;
  import info.magnolia.ui.vaadin.gwt.client.magnoliashell.viewport.AppsTransitionDelegate;
  import info.magnolia.ui.vaadin.gwt.client.magnoliashell.viewport.widget.AppsViewportWidget;
  import info.magnolia.ui.vaadin.magnoliashell.viewport.AppsViewport;
  
  import com.google.gwt.dom.client.Element;
  import com.google.gwt.user.client.Timer;
  import com.google.web.bindery.event.shared.EventBus;
  import com.vaadin.client.ComponentConnector;
  import com.vaadin.client.ConnectorHierarchyChangeEvent;
  import com.vaadin.client.LayoutManager;
  import com.vaadin.client.communication.StateChangeEvent;
  import com.vaadin.shared.ui.Connect;
  
  /**
   * Client-side connector for {@link AppsViewport}.
   */
  @Connect(AppsViewport.class)
  public class AppsViewportConnector extends ViewportConnector implements AppsViewportWidget.Listener {
  
      @Override
      protected void init() {
          super.init();
          getWidget().setTransitionDelegate(new AppsTransitionDelegate(getWidget()));
          addStateChangeHandler("activeComponent", new StateChangeEvent.StateChangeHandler() {
              @Override
              public void onStateChanged(StateChangeEvent event) {
                  final ComponentConnector newActiveComponent = (ComponentConnector) getState().activeComponent;
                  if (newActiveComponent != null && getWidget().getVisibleChild() != newActiveComponent) {
                      getWidget().showChild(newActiveComponent.getWidget());
                      newActiveComponent.getWidget().getElement().getStyle().clearOpacity();
                  }
              }
          });
      }
  
      private boolean isAppRunning(String appName) {
          return getState().runningAppNames.contains(appName);
      }
  
      private boolean isAppRegistered(String appName) {
          return getState().registeredAppNames.contains(appName);
      }
  
      @Override
      public void setEventBus(EventBus eventBus) {
          super.setEventBus(eventBus);
          eventBus.addHandler(AppRequestedEvent.TYPE, new AppRequestedEvent.Handler() {
              @Override
              public void onAppRequested(AppRequestedEvent event) {
                  getWidget().setCurtainVisible(false);
                  final String appName = event.getAppName();
                  if (isAppRegistered(appName)) {
                      if (!isAppRunning(appName)) {
                          getWidget().showAppPreloader(appName);
                      }
                  }
              }
          });
 
         eventBus.addHandler(ShellAppStartingEvent.TYPE, new ShellAppStartingEvent.Handler() {
             @Override
             public void onShellAppStarting(ShellAppStartingEvent event) {
                 int widgetCount = getWidget().getWidgetCount();
                 if (getWidget().isAppClosing()) {
                     --widgetCount;
                 }
                 getWidget().setCurtainVisible(widgetCount > 0);
             }
         });
 
         eventBus.addHandler(HideShellAppsEvent.TYPE, new HideShellAppsEvent.Handler() {
             @Override
             public void onHideShellApps(HideShellAppsEvent event) {
                 getWidget().setCurtainVisible(false);
             }
         });
 
         eventBus.addHandler(FullScreenEvent.TYPE, new FullScreenEvent.Handler() {
             @Override
             public void onChangeFullScreen(FullScreenEvent event) {
                 getWidget().setFullScreen(event.getIsFullScreen());
             }
         });
     }
 
     @Override
     public AppViewportState getState() {
         return (AppViewportState)super.getState();
     }
 
     @Override
     public void onConnectorHierarchyChange(final ConnectorHierarchyChangeEvent event) {
         if (getWidget().hasPreloader()) {
             new Timer() {
                 @Override
                 public void run() {
                     getWidget().removePreloader();
                 }
             }.schedule(500);
         }
         AppsViewportConnector.super.onConnectorHierarchyChange(event);
     }
 
     @Override
     public AppsViewportWidget getWidget() {
         return (AppsViewportWidget) super.getWidget();
     }
 
     @Override
     protected AppsViewportWidget createWidget() {
         return new AppsViewportWidget(this);
     }
 
     /**
      * Leave this empty so the viewport doesn't actually center out the children.
      */
     @Override
     protected void alignContent(Element e, LayoutManager layoutManager) {}
 
     @Override
     public void closeCurrentApp() {
         eventBus.fireEvent(new CurrentAppCloseEvent());
     }
 
     @Override
     public void setCurrentApp(String name) {
         eventBus.fireEvent(new ActivateAppEvent(name));
     }
 
 }