/*
    * 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.enduser.markup.html.form;
  
  import java.io.Serializable;
  import java.util.List;
  import org.apache.syncope.client.enduser.SyncopeEnduserSession;
  import org.apache.syncope.client.ui.commons.Constants;
  import org.apache.syncope.client.ui.commons.ajax.form.IndicatorAjaxFormComponentUpdatingBehavior;
  import org.apache.syncope.client.ui.commons.markup.html.form.AbstractMultiPanel;
  import org.apache.syncope.client.ui.commons.markup.html.form.FieldPanel;
  import org.apache.wicket.ajax.AjaxRequestTarget;
  import org.apache.wicket.markup.html.list.ListItem;
  import org.apache.wicket.markup.html.panel.Panel;
  import org.apache.wicket.model.IModel;
  
  public abstract class MultiFieldPanel<E extends Serializable> extends AbstractMultiPanel<E> {
  
      private static final long serialVersionUID = -6322397761456513324L;
  
      private MultiFieldPanel(
              final String id,
              final String name,
              final IModel<List<E>> model) {
  
          super(id, name, model);
      }
  
      public static class Builder<E extends Serializable> implements Serializable {
  
          private static final long serialVersionUID = -5304396077613727937L;
  
          private final IModel<List<E>> model;
  
          private boolean eventTemplate = false;
  
          public Builder(final IModel<List<E>> model) {
              this.model = model;
          }
  
          /**
           * Set on_change event in order to send MultiValueSelectorEvent to page.
           *
           * @param eventTemplate whether this is an event template
           * @return this instance, for fluent building
           */
          public Builder<E> setEventTemplate(final boolean eventTemplate) {
              this.eventTemplate = eventTemplate;
              return this;
          }
  
          /**
           * Default model object instance.
           *
           * @return default model object instance.
           */
          protected E newModelObject() {
              return null;
          }
  
          public MultiFieldPanel<E> build(final String id, final String name, final FieldPanel<E> panelTemplate) {
              return new MultiFieldPanel<>(id, name, model) {
  
                  private static final long serialVersionUID = 6600411297376841521L;
  
                  @Override
                  protected E newModelObject() {
                      return Builder.this.newModelObject();
                  }
  
                  @Override
                  protected FieldPanel<? extends Serializable> getItemPanel(final ListItem<E> item) {
                      final FieldPanel<? extends Serializable> fieldPanel = panelTemplate.clone();
                      fieldPanel.setIndex(item.getIndex());
                      fieldPanel.setNewModel(item);
                      fieldPanel.settingsDependingComponents();
                      fieldPanel.hideLabel();
  
                      if (eventTemplate) {
                          fieldPanel.getField().add(new IndicatorAjaxFormComponentUpdatingBehavior(Constants.ON_CHANGE) {
  
                              private static final long serialVersionUID = -1107858522700306810L;
  
                             @Override
                             protected void onUpdate(final AjaxRequestTarget target) {
                             }
                         });
                     }
 
                     return fieldPanel;
                 }
 
                 @Override
                 protected void clearInput(final Panel panel) {
                     FieldPanel.class.cast(panel).getField().clearInput();
                 }
 
                 @Override
                 protected void sendError(final String message) {
                     SyncopeEnduserSession.get().error(getString(Constants.OPERATION_ERROR));
                 }
             };
         }
     }
 }