/**
    * Copyright 2005-2014 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.coreservice.web.parameter;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.kuali.rice.coreservice.impl.component.ComponentBo;
  import org.kuali.rice.coreservice.impl.component.DerivedComponentBo;
  import org.kuali.rice.coreservice.impl.parameter.ParameterBo;
  import org.kuali.rice.kim.api.KimConstants;
  import org.kuali.rice.kim.api.services.KimApiServiceLocator;
  import org.kuali.rice.kns.lookup.KualiLookupableHelperServiceImpl;
  import org.kuali.rice.krad.bo.BusinessObject;
  import org.kuali.rice.krad.util.GlobalVariables;
  import org.kuali.rice.krad.util.KRADConstants;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  import java.util.regex.Pattern;
  
  /**
   * This is a description of what this class does - kellerj don't forget to fill this in.
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   *
   */
  public class ParameterLookupableHelperServiceImpl extends KualiLookupableHelperServiceImpl {
  
      private static final long serialVersionUID = 4381873774407301041L;
  
      private static final Log LOG = LogFactory.getLog(ParameterLookupableHelperServiceImpl.class);
      private static final String COMPONENT_NAME = "component.name";
      private static final String COMPONENT_CODE = "componentCode";
  
      @Override
      protected boolean allowsMaintenanceEditAction(BusinessObject businessObject) {
  
          ParameterBo parm = (ParameterBo)businessObject;
  
          Map<String, String> permissionDetails = new HashMap<String, String>();
          permissionDetails.put(KimConstants.AttributeConstants.NAMESPACE_CODE, parm.getNamespaceCode());
          permissionDetails.put(KimConstants.AttributeConstants.COMPONENT_NAME, parm.getComponentCode());
          permissionDetails.put(KimConstants.AttributeConstants.PARAMETER_NAME, parm.getName());
          return KimApiServiceLocator.getPermissionService().isAuthorizedByTemplate(
                  GlobalVariables.getUserSession().getPerson().getPrincipalId(), KRADConstants.KNS_NAMESPACE,
                  KimConstants.PermissionTemplateNames.MAINTAIN_SYSTEM_PARAMETER, permissionDetails,
                  Collections.<String, String>emptyMap());
      }
  
      @Override
      public List<? extends BusinessObject> getSearchResults(java.util.Map<String, String> fieldValues) {
  
          if (fieldValues.containsKey(COMPONENT_NAME) && fieldValues.containsKey(COMPONENT_CODE)) {
              //remove hidden derived component code if component name exists.
              fieldValues.remove(COMPONENT_CODE);
              fieldValues.put(COMPONENT_CODE,"");
          }
  
          String componentNameFieldValue = fieldValues.get(COMPONENT_NAME);
          fieldValues.remove(COMPONENT_NAME);
  
          List<ParameterBo> results = (List<ParameterBo>)super.getSearchResultsUnbounded(fieldValues);
          normalizeParameterComponents(results);
  
          if (!StringUtils.isBlank(componentNameFieldValue)) {
              componentNameFieldValue = componentNameFieldValue.trim();
              componentNameFieldValue = componentNameFieldValue.replace("*", ".*");
              componentNameFieldValue = ".*" + componentNameFieldValue + ".*";
  
              Pattern pattern = Pattern.compile(componentNameFieldValue, Pattern.CASE_INSENSITIVE);
  
              Iterator<ParameterBo> resultsIter = results.iterator();
              //Adding a null check to handle the case where a component isn't found better
              while (resultsIter.hasNext()) {
                  ParameterBo result = resultsIter.next();
                  ComponentBo component = result.getComponent();
                  if (component != null && !pattern.matcher(component.getName()).matches()) {
                      resultsIter.remove();
                  }
              }
          }
  
         return results;
     }
 
     private void normalizeParameterComponents(List<ParameterBo> parameters) {
         // attach the derived components where needed
         for (ParameterBo parameterBo : parameters) {
             if (parameterBo.getComponent() == null) {
                 parameterBo.setComponent(DerivedComponentBo.toComponentBo(parameterBo.getDerivedComponent()));
             }
         }
     }
 
 }