/**
    * This file Copyright (c) 2014-2016 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.pages.app.editor.pagebar;
  
  import info.magnolia.pages.app.editor.PagesEditorSubAppDescriptor;
  import info.magnolia.pages.app.editor.extension.Extension;
  import info.magnolia.pages.app.editor.extension.ExtensionContainer;
  import info.magnolia.pages.app.editor.extension.ExtensionFactory;
  import info.magnolia.pages.app.editor.extension.definition.ExtensionDefinition;
  import info.magnolia.pages.app.editor.pagebar.definition.PageBarDefinition;
  import info.magnolia.ui.api.app.SubAppContext;
  import info.magnolia.ui.api.app.SubAppDescriptor;
  import info.magnolia.ui.contentapp.detail.DetailLocation;
  import info.magnolia.ui.contentapp.detail.DetailView;
  import info.magnolia.ui.vaadin.editor.pagebar.PageBarView;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  import javax.inject.Inject;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Presenter for the page bar displayed on top of the page editor. Acts as container for {@link Extension}s defined under
   * the pageBar.
   */
  public class PageBarPresenter implements ExtensionContainer, PageBarView.Listener {
  
      private static final Logger log = LoggerFactory.getLogger(PageBarPresenter.class);
  
      private final PageBarView view;
      private final SubAppContext subAppContext;
      private final ExtensionFactory extensionFactory;
  
      private List<Extension> extensions = new ArrayList<Extension>();
  
      @Inject
      public PageBarPresenter(PageBarView view, SubAppContext subAppContext, ExtensionFactory extensionFactory) {
          this.view = view;
          this.subAppContext = subAppContext;
          this.extensionFactory = extensionFactory;
      }
  
      @Override
      public PageBarView start(DetailLocation location) {
          SubAppDescriptor subAppDescriptor = subAppContext.getSubAppDescriptor();
  
          if (subAppDescriptor instanceof PagesEditorSubAppDescriptor) {
              PageBarDefinition definition =  ((PagesEditorSubAppDescriptor) subAppDescriptor).getPageBar();
              if (definition != null) {
                  Map<String, ExtensionDefinition> extensionDefinitions = definition.getExtensions();
                  extensions = extensionFactory.createExtensions(extensionDefinitions);
              } else {
                  log.error("No pageBar definition defined for pages detail app, no extensions will be loaded.");
              }
          } else {
              log.error("Expected an instance of {} but got {}. No extensions will be loaded.", PagesEditorSubAppDescriptor.class.getSimpleName(), subAppDescriptor.getClass().getName());
          }
  
          for (Extension extension : extensions) {
              view.addPageBarComponent(extension.start(location));
          }
          view.setListener(this);
  
          togglePreviewMode(location);
         return view;
     }
 
     public void setPageName(String caption, String nodePath) {
         String pageName = caption.toUpperCase() + "  -  " + nodePath;
         view.setPageName(pageName);
     }
 
     public void setPageName(String pageName) {
         view.setPageName(pageName);
     }
 
     private void togglePreviewMode(DetailLocation location) {
         boolean isPreview = DetailView.ViewType.VIEW.equals(location.getViewType());
         view.togglePreviewMode(isPreview);
     }
 
     public PageBarView getView() {
         return view;
     }
 
     @Override
     public void onLocationUpdate(DetailLocation location) {
         for (Extension extension : extensions) {
             extension.onLocationUpdate(location);
         }
         togglePreviewMode(location);
     }
 
     @Override
     public void deactivateExtensions() {
         for (Extension extension : extensions) {
             extension.deactivate();
         }
     }
 
     @Override
     public void stop() {
         for (Extension extension : extensions) {
             extension.stop();
         }
     }
 }