/**
    * This file Copyright (c) 2012-2018 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.ui.framework.app;
  
  import static info.magnolia.ui.api.message.MessageType.ERROR;
  import static java.util.Optional.ofNullable;
  import static java.util.stream.Collectors.toList;
  
  import info.magnolia.context.MgnlContext;
  import info.magnolia.i18nsystem.SimpleTranslator;
  import info.magnolia.objectfactory.Components;
  import info.magnolia.ui.api.app.App;
  import info.magnolia.ui.api.app.AppContext;
  import info.magnolia.ui.api.app.AppView;
  import info.magnolia.ui.api.app.ChooseDialogCallback;
  import info.magnolia.ui.api.app.SubAppDescriptor;
  import info.magnolia.ui.api.context.UiContext;
  import info.magnolia.ui.api.location.DefaultLocation;
  import info.magnolia.ui.api.location.Location;
  import info.magnolia.ui.api.message.Message;
  import info.magnolia.util.OptionalConsumer;
  
  import java.util.List;
  import java.util.stream.Stream;
  
  import javax.inject.Inject;
  
  import org.apache.commons.lang3.StringUtils;
  
  
  /**
   * Basic app implementation with default behavior suitable for most apps.
   *
   * @see info.magnolia.ui.api.app.App
   */
  public class BaseApp implements App {
  
      protected AppContext appContext;
  
      private AppView view;
  
      private SimpleTranslator i18n;
  
      @Inject
      protected BaseApp(AppContext appContext, AppView view, SimpleTranslator i18n) {
          this.appContext = appContext;
          this.view = view;
          this.i18n = i18n;
          view.setListener(appContext);
      }
  
      /**
       * since 6.2 use {@link #BaseApp(AppContext, AppView, SimpleTranslator)} instead
       */
      @Deprecated
      protected BaseApp(AppContext appContext, AppView view) {
          this(appContext, view, Components.getComponent(SimpleTranslator.class));
      }
  
      @Override
      public void locationChanged(Location location) {
          Messagel#Message">Message unknownSubAppMessage = new Message(ERROR,
                  i18n.translate("ui-framework.actions.openSubApp.subject", location.getSubAppId()),
                  i18n.translate("ui-framework.actions.openSubApp.message", location.getAppName(), location.getSubAppId()));
          openSubApp(location, () -> appContext.sendLocalMessage(unknownSubAppMessage));
      }
  
      @Override
     public void start(Location location) {
         view.setAppName(location.getAppName());
 
         List<SubAppDescriptor> subAppDescriptors = getSubAppDescriptorStream().collect(toList());
 
         subAppDescriptors.stream()
                 .filter(subAppDescriptor -> !subAppDescriptor.isClosable())
                 .map(SubAppDescriptor::getName)
                 .map(subAppName -> getDefaultLocation(location, subAppName))
                 .forEach(appContext::openSubApp);
 
         openSubApp(location, () -> subAppDescriptors.stream()
                 .findFirst()
                 .map(SubAppDescriptor::getName)
                 .map(subAppName -> getDefaultLocation(location, subAppName))
                 .ifPresent(l -> {
                     Messagee/Message.html#Message">Message message = new Message();
                     message.setSubject(i18n.translate("ui-framework.openSubApp.url.subject", location.getSubAppId()));
                     message.setMessage(i18n.translate("ui-framework.openSubApp.url.message",
                             getRequestURL(location), getRequestURL(l), location.getAppName(), location.getSubAppId()));
 
                     appContext.sendLocalMessage(message);
                     appContext.openSubApp(l);
                 }));
 
     }
 
     private DefaultLocation getDefaultLocation(Location location, String subAppName) {
         return new DefaultLocation(location.getAppType(), location.getAppName(), subAppName);
     }
 
     private String getRequestURL(Location location) {
         return StringUtils.join(MgnlContext.getWebContext().getRequest().getRequestURL(), "#", location.toString());
     }
 
     private OptionalConsumer<SubAppDescriptor> openSubApp(Location location, Runnable unknownSubAppHandler) {
         String subAppId = ofNullable(location.getSubAppId()).orElse("null");
         return OptionalConsumer.of(getSubAppDescriptorStream().filter(s -> s.getName().equals(subAppId)).findFirst())
                 .ifPresent(s -> appContext.openSubApp(location)).ifNotPresent(unknownSubAppHandler);
     }
 
     private Stream<SubAppDescriptor> getSubAppDescriptorStream() {
         return appContext.getAppDescriptor().getSubApps().values().stream();
     }
 
     protected AppContext getAppContext() {
         return appContext;
     }
 
     @Override
     public void stop() {
     }
 
     @Override
     public AppView getView() {
         return view;
     }
 
     @Override
     public void openChooseDialog(UiContext overlayLayer, String selectedId, ChooseDialogCallback callback) {
         // Choose dialogs are a feature of content apps, invoking this on a BaseApp will not do anything.
     }
 
     @Override
     public void openChooseDialog(UiContext uiContext, String targetTreeRootPath, String selectedId, ChooseDialogCallback callback) {
         // Choose dialogs are a feature of content apps, invoking this on a BaseApp will not do anything.
     }
 }