/**
    * Copyright 2005-2016 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.rice.krad.uif.element;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.krad.datadictionary.parse.BeanTag;
  import org.kuali.rice.krad.datadictionary.parse.BeanTagAttribute;
  import org.kuali.rice.krad.uif.component.Component;
  import org.kuali.rice.krad.uif.container.PageGroup;
  import org.kuali.rice.krad.uif.lifecycle.LifecycleEventListener;
  import org.kuali.rice.krad.uif.lifecycle.ViewLifecycle;
  import org.kuali.rice.krad.uif.util.LifecycleElement;
  import org.kuali.rice.krad.uif.view.View;
  import org.kuali.rice.krad.util.GlobalVariables;
  import org.kuali.rice.krad.util.MessageMap;
  
  import java.util.HashSet;
  import java.util.Set;
  
  /**
   * ValidationMessages for logic and options specific to pages.
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  @BeanTag(name = "pageValidationMessages", parent = "Uif-PageValidationMessages")
  public class PageValidationMessages extends GroupValidationMessages implements LifecycleEventListener {
      private static final long serialVersionUID = 6387432156428507958L;
  
      private boolean showPageSummaryHeader;
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void generateMessages(View view, Object model, Component parent) {
          super.generateMessages(view, model, parent);
  
          ViewLifecycle viewLifecycle = ViewLifecycle.getActiveLifecycle();
          viewLifecycle.registerLifecycleCompleteListener(view, this);
      }
  
      /**
       * Overridding to prevent the initial writing of data attributes until the view has been processed and
       * we collection unmatched messages (through the lifecycle event).
       *
       * {@inheritDoc}
       */
      @Override
      protected void addValidationMessageDataAttributes(Component parent) {
          // do nothing
      }
  
      /**
       * Check for message keys that are not matched anywhere on the page, these unmatched messages must still be
       * displayed at the page level.
       *
       * {@inheritDoc}
       */
      @Override
      public void processEvent(ViewLifecycle.LifecycleEvent lifecycleEvent, View view, Object model,
              LifecycleElement eventElement) {
          View eventComponent = (View) eventElement;
          PageGroup currentPage = eventComponent.getCurrentPage();
  
          Set<String> allPossibleKeys = new HashSet<String>();
  
          Set<String> renderedPropertyPaths = ViewLifecycle.getViewPostMetadata().getAllRenderedPropertyPaths();
          if (renderedPropertyPaths != null) {
              allPossibleKeys.addAll(renderedPropertyPaths);
          }
  
          addNestedGroupKeys(allPossibleKeys, currentPage);
  
          if (getAdditionalKeysToMatch() != null) {
              allPossibleKeys.addAll(getAdditionalKeysToMatch());
          }
  
          if (StringUtils.isNotBlank(currentPage.getId())) {
              allPossibleKeys.add(currentPage.getId());
          }
  
          MessageMap messageMap = GlobalVariables.getMessageMap();
  
          Set<String> messageKeys = new HashSet<String>();
  
          messageKeys.addAll(messageMap.getAllPropertiesWithErrors());
         messageKeys.addAll(messageMap.getAllPropertiesWithWarnings());
         messageKeys.addAll(messageMap.getAllPropertiesWithInfo());
 
         messageKeys.removeAll(allPossibleKeys);
 
         for (String key : messageKeys) {
             getErrors().addAll(getMessages(view, key, messageMap.getErrorMessagesForProperty(key, true)));
             getWarnings().addAll(getMessages(view, key, messageMap.getWarningMessagesForProperty(key, true)));
             getInfos().addAll(getMessages(view, key, messageMap.getInfoMessagesForProperty(key, true)));
         }
 
         super.addValidationMessageDataAttributes(currentPage);
     }
 
     /**
      * If true, shows the page summary header (message count header message in the message block).  Otherwise, this
      * header is not rendered.
      *
      * @return true if the header will show, false otherwise
      */
     @BeanTagAttribute
     public boolean isShowPageSummaryHeader() {
         return showPageSummaryHeader;
     }
 
     /**
      * Set the page summary header to show or not show.
      *
      * @param showPageSummaryHeader
      */
     public void setShowPageSummaryHeader(boolean showPageSummaryHeader) {
         this.showPageSummaryHeader = showPageSummaryHeader;
     }
 }