/**
    * This file Copyright (c) 2012-2018 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.vaadin.richtext;
  
  import static info.magnolia.ui.vaadin.gwt.client.ckeditor.VMagnoliaCKEditorTextEvents.*;
  
  import info.magnolia.ui.vaadin.ckeditor.MagnoliaCKEditorTextFieldEvents;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.commons.lang3.StringUtils;
  import org.vaadin.openesignforms.ckeditor.CKEditorTextField;
  
  import com.vaadin.server.PaintException;
  import com.vaadin.server.PaintTarget;
  
  
  /**
   * Magnolia5 / Vaadin7 compatibility class. Extended CKEditorTextField for custom made Magnolia plugins.
   * By default CKEditor wrapper for Vaadin does not allow
   * custom events between CKEditor plugins and server.
   */
  public class MagnoliaRichTextField extends CKEditorTextField implements MagnoliaCKEditorTextFieldEvents {
  
      private String fireEvent;
      private String fireEventValue;
      private String[] customEvents;
      private Map<String, String> serverPlugins;
      private List<PluginListener> listeners = new ArrayList<>();
      private MagnoliaRichTextFieldConfig config;
  
      public MagnoliaRichTextField() {
          super();
      }
  
      @Override
      public void addListener(PluginListener listener) {
          listeners.add(listener);
      }
  
      public MagnoliaRichTextField(MagnoliaRichTextFieldConfig config) {
          super(config);
          this.config = config;
          serverPlugins = config.getExternalPlugins();
          customEvents = config.getListenedEvents();
      }
  
      @Override
      public void changeVariables(Object source, Map<String, Object> variables) {
          super.changeVariables(source, variables);
  
          if(isEmpty() && !isReadOnly()) {
              this.setValue(null, true);
          }
  
          if (config != null && config.getListenedEvents().length > 0) {
              // See if client sends events
              for (String eventName : config.getListenedEvents()) {
                  String eventNameResolved = VAR_EVENT_PREFIX + eventName;
                  if (variables.containsKey(eventNameResolved)) {
                      for (PluginListener listener : listeners) {
                          listener.onPluginEvent(eventName, variables.get(eventNameResolved).toString());
                      }
                  }
              }
          }
     }
 
     @Override
     public void firePluginEvent(String event, String value) {
         fireEvent = event;
         fireEventValue = value;
         markAsDirty();
     }
 
     @Override
     public void paintContent(PaintTarget target) throws PaintException {
         super.paintContent(target);
 
         if (serverPlugins != null) {
             target.addAttribute(VAR_SERVERPLUGINS, serverPlugins);
         }
 
         // tell client that server is interested of these events
         if (customEvents != null) {
             target.addAttribute(VAR_EVENTNAMES, customEvents);
         }
 
         // send event to plugin
         if (fireEvent != null && fireEventValue != null) {
             target.addAttribute(VAR_FIRE_PLUGIN_EVENT, fireEvent);
             target.addAttribute(VAR_FIRE_PLUGIN_EVENT_VALUE, fireEventValue);
             fireEvent = null;
             fireEventValue = null;
         }
     }
 
     @Override
     public boolean isEmpty() {
         return StringUtils.isEmpty(getValue());
     }
 }