/**
    * 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.action;
  
  import info.magnolia.i18nsystem.SimpleTranslator;
  import info.magnolia.jcr.predicate.AbstractPredicate;
  import info.magnolia.jcr.util.NodeTypes;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.ui.ValueContext;
  import info.magnolia.ui.api.context.UiContext;
  import info.magnolia.ui.contentapp.browser.ActionExecutionService;
  import info.magnolia.ui.datasource.jcr.JcrDatasourceDefinition;
  
  import java.util.Set;
  import java.util.stream.Collectors;
  import java.util.stream.StreamSupport;
  
  import javax.inject.Inject;
  import javax.jcr.Node;
  
  import org.apache.commons.lang3.StringUtils;
  
  import com.machinezoo.noexception.Exceptions;
  
  import lombok.AllArgsConstructor;
  
  /**
   * Delete confirmation action which notifies if sub-nodes were modified.
   *
   * @param <D> {@link DeleteNodesConfirmationActionDefinition}.
   */
  public class DeleteNodesConfirmationAction<D extends DeleteNodesConfirmationActionDefinition> extends ConfirmationAction<D, Node> {
  
      private static final String NL = "<br />";
  
      private boolean warningAlreadySet = false;
  
      private final ModifiedSubNodesWithNodeTypePredicate predicate;
  
      @Inject
      public DeleteNodesConfirmationAction(D definition, UiContext uiContext, ActionExecutionService actionExecutionService, SimpleTranslator i18n, ValueContext valueContext, JcrDatasourceDefinition datasourceDefinition) {
          super(definition, uiContext, actionExecutionService, i18n, valueContext);
          this.predicate = new ModifiedSubNodesWithNodeTypePredicate(datasourceDefinition.getAllowedNodeTypes());
      }
  
      @Override
      protected String getConfirmationMessage() {
          if (predicate == null) {
              return super.getConfirmationMessage();
          }
          StringBuilder label = new StringBuilder();
  
          // Default message
          label.append(super.getConfirmationMessage());
  
          getValueContext().get().forEach(node -> {
              String modifiedSubNodesPaths = getModifiedSubNodesMessage(node);
              if (StringUtils.isNotEmpty(modifiedSubNodesPaths)) {
                  if (!warningAlreadySet) {
                      label.append(NL).append(NL);
                      label.append(getSimpleTranslator().translate("confirmation.delete.modified.message"));
                      label.append(NL);
                      warningAlreadySet = true;
                  }
                  label.append(modifiedSubNodesPaths);
              }
          });
          return label.toString();
     }
 
     private String getModifiedSubNodesMessage(Node parent) {
         return StreamSupport.stream(Exceptions.wrap().get(() -> NodeUtil.getNodes(parent, predicate).spliterator()), false)
                 .map(Exceptions.wrap().function(Node::getPath))
                 .collect(Collectors.joining(NL));
     }
 
     @AllArgsConstructor
     private static class ModifiedSubNodesWithNodeTypePredicate extends AbstractPredicate<Node> {
 
         private final Set<String> nodeTypes;
 
         @Override
         public boolean evaluateTyped(Node node) {
             return nodeTypes.stream()
                     .filter(Exceptions.wrap().predicate(nodeType -> NodeUtil.isNodeType(node, nodeType)))
                     .map(Exceptions.wrap().function(any -> NodeTypes.Activatable.ACTIVATION_STATUS_MODIFIED == NodeTypes.Activatable.getActivationStatus(node)))
                     .findFirst()
                     .orElse(false);
         }
     }
 }