/**
    * This file Copyright (c) 2018 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.admincentral;
  
  import info.magnolia.context.AsynchronousContext;
  import info.magnolia.context.MgnlContext;
  import info.magnolia.objectfactory.ComponentProvider;
  import info.magnolia.objectfactory.Components;
  import info.magnolia.objectfactory.guice.GuiceComponentProvider;
  import info.magnolia.ui.editor.NonRoundingConverterFactory;
  import info.magnolia.ui.framework.ioc.CurrentUiContextReference;
  import info.magnolia.ui.framework.ioc.SessionStore;
  import info.magnolia.ui.framework.ioc.UiContextBoundComponentProvider;
  import info.magnolia.ui.framework.ioc.UiContextReference;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.inject.Key;
  import com.vaadin.annotations.JavaScript;
  import com.vaadin.annotations.Push;
  import com.vaadin.annotations.Theme;
  import com.vaadin.server.VaadinRequest;
  import com.vaadin.server.VaadinSession;
  import com.vaadin.shared.communication.PushMode;
  import com.vaadin.shared.ui.ui.Transport;
  import com.vaadin.ui.UI;
  import com.vaadin.ui.UIDetachedException;
  
  /**
   * The Resurface UI is the root Vaadin application for the Magnolia 6.0 Admincentral.
   */
  // TODO restore pluggability via magnolia.properties OR resolve on webapp level
  // Don't remove the theme quite yet; keep the old value in magnolia.properties until we unbundle the old admincentral
  @Theme("resurface-admincentral")
  @JavaScript({ "jquery-3.4.1.min.js", "jquery-migrate-3.0.1.min.js" })
  @Push(transport = Transport.LONG_POLLING, value = PushMode.MANUAL)
  public class ResurfaceUI extends UI {
      private static final Logger log = LoggerFactory.getLogger(ResurfaceUI.class);
      private ResurfaceUIPresenter presenter;
      private GuiceComponentProvider guiceComponentProvider;
      private AsynchronousContext.OperationFactory operationFactory;
  
      @Override
      protected void init(VaadinRequest request) {
          log.debug("Initializing Resurface Admincentral UI...");
          getPage().setTitle("Admincentral - Magnolia");
  
          // Disable rounding for Vaadin's legacy string-to-floating-point converters
          VaadinSession currentSession = VaadinSession.getCurrent();
          currentSession.setConverterFactory(new NonRoundingConverterFactory());
  
          log.debug("Initializing ComponentProvider with Admincentral UiContext...");
          UiContextReference admincentralUiReference = UiContextReference.ofUi(this);
  
          Map<Key, Object> instances = new HashMap<>();
          instances.put(Key.get(CurrentUiContextReference.class), new CurrentUiContextReference());
          SessionStore.access().createBeanStore(admincentralUiReference, instances);
          // CurrentUiContextReference has to be put into the BeanStore before the ComponentProvider is constructed
          ComponentProvider componentProvider = new UiContextBoundComponentProvider(admincentralUiReference);
          // save the reference to the Guice component provider so that we can push it into context
          // when accessing this UI from a background thread
          this.guiceComponentProvider = (GuiceComponentProvider) componentProvider.getParent();
  
          setContent(componentProvider.getComponent(ResurfaceUILayout.class));
 
         this.operationFactory = componentProvider.getComponent(AsynchronousContext.OperationFactory.class);
 
         presenter = componentProvider.newInstance(ResurfaceUIPresenter.class, this);
         presenter.start();
     }
 
     @Override
     public void accessSynchronously(Runnable runnable) throws UIDetachedException {
             super.accessSynchronously(() -> {
                 // check whether we're in UI context.
                 // if we aren't, we need to push the UI Guice component provider
                 // manually for the current action
                 boolean isExecutingOutsideOfUiIoCContext = Components.getComponentProvider() != this.guiceComponentProvider;
                 if (isExecutingOutsideOfUiIoCContext) {
                     Components.pushProvider(guiceComponentProvider);
                 }
                 try {
                     Runnable withMgnlContext = MgnlContext.hasInstance() ? runnable : operationFactory.wrap(runnable);
                     withMgnlContext.run();
                 } finally {
                     if (isExecutingOutsideOfUiIoCContext) {
                         Components.popProvider();
                     }
                 }
             });
     }
 
     @Override
     public void detach() {
         try {
             SessionStore.access().releaseBeanStore(UiContextReference.ofCurrentUi());
             presenter.stop();
             // make sure the error handler covers the detach phase (it does not happen in service phase).
             super.detach();
         } catch (Exception e) {
             getErrorHandler().error(new com.vaadin.server.ErrorEvent(e));
         }
     }
 }