/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.syncope.client.console.panels;
  
  import org.apache.wicket.ajax.AjaxRequestTarget;
  import org.apache.wicket.ajax.markup.html.AjaxLink;
  import org.apache.wicket.markup.html.IHeaderContributor;
  import org.apache.wicket.markup.html.WebMarkupContainer;
  import org.apache.wicket.markup.html.basic.Label;
  import org.apache.wicket.markup.html.panel.Panel;
  import org.apache.wicket.model.ResourceModel;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class MultilevelPanel extends Panel implements IHeaderContributor {
  
      private static final long serialVersionUID = -4064294905566247729L;
  
      protected static final Logger LOG = LoggerFactory.getLogger(MultilevelPanel.class);
  
      public static final String FIRST_LEVEL_ID = "first";
  
      public static final String SECOND_LEVEL_ID = "second";
  
      private boolean isFirstLevel = true;
  
      private final WebMarkupContainer firstLevelContainer;
  
      private final WebMarkupContainer secondLevelContainer;
  
      public MultilevelPanel(final String id) {
          super(id);
  
          firstLevelContainer = new WebMarkupContainer("firstLevelContainer");
          firstLevelContainer.setOutputMarkupPlaceholderTag(true);
          firstLevelContainer.setVisible(true);
          add(firstLevelContainer);
  
          secondLevelContainer = new WebMarkupContainer("secondLevelContainer");
          secondLevelContainer.setOutputMarkupPlaceholderTag(true);
          secondLevelContainer.setVisible(false);
          add(secondLevelContainer);
  
          secondLevelContainer.add(new AjaxLink<String>("back") {
  
              private static final long serialVersionUID = -7978723352517770644L;
  
              @Override
              public void onClick(final AjaxRequestTarget target) {
                  onClickBackInternal(target);
                  prev(target);
              }
          });
      }
  
      public final void next(final String title, final SecondLevel secondLevel, final AjaxRequestTarget target) {
          if (isFirstLevel) {
              secondLevelContainer.addOrReplace(new Label("title", new ResourceModel(title, title)));
              secondLevelContainer.addOrReplace(secondLevel);
              secondLevelContainer.setVisible(true);
              target.add(secondLevelContainer);
  
              firstLevelContainer.setVisible(false);
              target.add(firstLevelContainer);
  
              isFirstLevel = false;
          } else {
              LOG.warn("No further level available");
          }
      }
  
      public void prev(final AjaxRequestTarget target) {
          if (isFirstLevel) {
              LOG.warn("No further level available");
          } else {
              firstLevelContainer.setVisible(true);
              target.add(firstLevelContainer);
  
              secondLevelContainer.setVisible(false);
              target.add(secondLevelContainer);
  
              isFirstLevel = true;
          }
     }
 
     protected void onClickBackInternal(final AjaxRequestTarget taget) {
     }
 
     /**
      * Add panel with id {@code first}
      *
      * @param panel panel to be used into the first level.
      * @return the current MultilevelPanel instance.
      */
     public MultilevelPanel setFirstLevel(final Panel panel) {
         firstLevelContainer.addOrReplace(panel);
         return this;
     }
 
     public static class SecondLevel extends Panel {
 
         private static final long serialVersionUID = 5685291231060035528L;
 
         public SecondLevel() {
             this(SECOND_LEVEL_ID);
         }
 
         public SecondLevel(final String id) {
             super(id);
         }
     }
 }