/**
    * 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.ui.contentapp;
  
  import info.magnolia.objectfactory.ComponentProvider;
  import info.magnolia.ui.api.ioc.ViewScoped;
  import info.magnolia.ui.contentapp.browser.ActionExecutionService;
  import info.magnolia.ui.contentapp.browser.TreePresenter;
  import info.magnolia.ui.contentapp.browser.TreeView;
  import info.magnolia.ui.contentapp.configuration.TreeViewDefinition;
  import info.magnolia.ui.contentapp.observation.JcrDataSourceObservation;
  import info.magnolia.ui.contentapp.observation.JcrObservation;
  import info.magnolia.ui.databinding.JcrItemPropertySet;
  import info.magnolia.ui.datasource.jcr.JcrDatasourceDefinition;
  import info.magnolia.ui.datasource.jcr.JcrSessionManager;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Optional;
  import java.util.stream.Stream;
  
  import javax.inject.Inject;
  import javax.jcr.Item;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.vaadin.data.PropertySet;
  
  import lombok.SneakyThrows;
  
  /**
   *
   * JCR specific presenter implementation backing up {@link TreeView}.
   */
  @ViewScoped
  public class JcrTreePresenter extends TreePresenter<Item> {
  
      private static final Logger log = LoggerFactory.getLogger(JcrTreePresenter.class);
  
      private final JcrDatasourceDefinition jcrDatasourceDefinition;
      private final JcrDataSourceObservation jcrDataSourceObservation;
      private final JcrItemInteractionAvailability interactionAvailability;
  
      @Inject
      public JcrTreePresenter(
              JcrSessionManager sessionManager,
              JcrDatasourceDefinition jcrDatasourceDefinition,
              TreeViewDefinition<Item> definition,
              ComponentProvider componentProvider,
              JcrObservation jcrObservation,
              ActionExecutionService actionExecutionService) {
          super(definition, componentProvider, actionExecutionService);
          this.jcrDatasourceDefinition = jcrDatasourceDefinition;
          this.jcrDataSourceObservation = new JcrDataSourceObservation(jcrObservation);
          this.interactionAvailability  = new JcrItemInteractionAvailability(sessionManager);
  
          jcrDataSourceObservation.register(jcrDatasourceDefinition, this.dataProvider());
      }
  
      @Override
      public Stream<Item> getParents(Item item) {
          final List<Item> parents = new ArrayList<>();
          Optional<Item> parent = getDirectParent(item);
          while (parent.isPresent()) {
              parents.add(parent.get());
              parent = getDirectParent(parent.get());
          }
         return parents.stream();
     }
 
     @Override
     public void destroy() {
         this.jcrDataSourceObservation.destroy();
     }
 
     @Override
     public FilterableHierarchicalDataProvider<Item> createDataProvider() {
         return FilterableHierarchicalDataProvider.wrap(componentProvider.newInstance(HierarchicalJcrDataProvider.class, jcrDatasourceDefinition));
     }
 
     @SneakyThrows
     private Optional<Item> getDirectParent(Item item) {
         if (item.isNode() && item.getDepth() == 0) {
             return Optional.empty();
         }
 
         return Optional.of(item.getParent());
     }
 
     @Override
     protected PropertySet<Item> createPropertySet() {
         return JcrItemPropertySet.fromColumns(definition.getColumns());
     }
 
     @Override
     public boolean isItemAvailable(Item item) {
         return this.interactionAvailability.isItemAvailable(item);
     }
 }