/*
    * Copyright 2007-2009 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.kns.rules;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.kuali.rice.kim.bo.impl.KimAttributes;
  import org.kuali.rice.kim.bo.types.dto.AttributeSet;
  import org.kuali.rice.kim.service.KIMServiceLocator;
  import org.kuali.rice.kim.util.KimConstants;
  import org.kuali.rice.kns.bo.Parameter;
  import org.kuali.rice.kns.bo.ParameterDetailType;
  import org.kuali.rice.kns.datadictionary.DataDictionaryException;
  import org.kuali.rice.kns.document.MaintenanceDocument;
  import org.kuali.rice.kns.maintenance.rules.MaintenanceDocumentRuleBase;
  import org.kuali.rice.kns.service.KNSServiceLocator;
  import org.kuali.rice.kns.util.GlobalVariables;
  import org.kuali.rice.kns.util.KNSConstants;
  import org.kuali.rice.kns.util.ObjectUtils;
  import org.kuali.rice.kns.util.RiceKeyConstants;
  
  /**
   * 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 ParameterRule extends MaintenanceDocumentRuleBase {
  
  	/**
  	 * This overridden method ...
  	 *
  	 * @see org.kuali.rice.kns.maintenance.rules.MaintenanceDocumentRuleBase#processCustomRouteDocumentBusinessRules(org.kuali.rice.kns.document.MaintenanceDocument)
  	 */
  	@Override
  	protected boolean processCustomRouteDocumentBusinessRules(MaintenanceDocument document) {
  		boolean result = super.processCustomRouteDocumentBusinessRules( document );
  
  		result &= checkAllowsMaintenanceEdit( document.getDocumentHeader().getWorkflowDocument()
  				.getRouteHeader().getInitiatorPrincipalId(), (Parameter)getNewBo() );
  
  		result &= checkComponent((Parameter) getNewBo());
  		
  		return result;
  	}
  
  	protected boolean checkAllowsMaintenanceEdit(String initiatorPrincipalId, Parameter newBO) {
  
  		 boolean allowsEdit = false;
  	        Parameter parm = (Parameter)newBO;
  	        
  	        AttributeSet permissionDetails = new AttributeSet();
  	        permissionDetails.put(KimAttributes.NAMESPACE_CODE, parm.getParameterNamespaceCode());
  	        permissionDetails.put(KimAttributes.COMPONENT_NAME, parm.getParameterDetailTypeCode());
  	        permissionDetails.put(KimAttributes.PARAMETER_NAME, parm.getParameterName());
  	        allowsEdit = KIMServiceLocator.getIdentityManagementService().isAuthorizedByTemplateName(
  	        				GlobalVariables.getUserSession().getPerson().getPrincipalId(),
  	        				KNSConstants.KNS_NAMESPACE,
  	        				KimConstants.PermissionTemplateNames.MAINTAIN_SYSTEM_PARAMETER,
  	        				permissionDetails, null);
  	        if(!allowsEdit){
  	        	putGlobalError(RiceKeyConstants.AUTHORIZATION_ERROR_PARAMETER);
  	        }
  	        return allowsEdit;
  	}
  
      public boolean checkComponent(Parameter param) {
          String component = param.getParameterDetailTypeCode();
          String namespace = param.getParameterNamespaceCode();
          boolean result = false;
  
          try {
              List<ParameterDetailType> dataDictionaryAndSpringComponents = KNSServiceLocator.getParameterServerService().getNonDatabaseComponents();
              for (ParameterDetailType pdt : dataDictionaryAndSpringComponents) {
                  if (pdt.getParameterNamespaceCode().equals(namespace) && pdt.getParameterDetailTypeCode().equals(component)) {
                      result = true;
                      break;
                  }
              }
  
              if (!result) {
                  Map<String, String> primaryKeys = new HashMap<String, String>(2);
                  primaryKeys.put("parameterNamespaceCode", namespace);
                  primaryKeys.put("parameterDetailTypeCode", component);
                 result = ObjectUtils.isNotNull(getBoService().findByPrimaryKey(ParameterDetailType.class, primaryKeys));
             }
 
             if (!result) {
                 putFieldError("parameterDetailTypeCode", "error.document.parameter.detailType.invalid", component);
             }
 
             return result;
         }
         catch (DataDictionaryException ex) {
             throw new RuntimeException("Problem parsing data dictionary during full load required for rule validation: " + ex.getMessage(), ex);
         }
     }
 }