/**
    * Copyright 2005-2013 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.kim.ldap;
  
  import static org.apache.commons.lang.StringUtils.contains;
  import static org.apache.commons.lang.StringUtils.equalsIgnoreCase;
  import static org.kuali.rice.core.util.BufferedLogger.debug;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.kim.api.identity.affiliation.EntityAffiliation;
  import org.kuali.rice.kim.api.identity.affiliation.EntityAffiliationType;
  import org.springframework.ldap.core.DirContextOperations;
  
  /**
   * Maps LDAP Information to KIM Entity Affiliation
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class EntityAffiliationMapper extends BaseMapper<List<EntityAffiliation>> {
  
  	@Override
      List<EntityAffiliation> mapDtoFromContext(DirContextOperations context) {
      	List<EntityAffiliation.Builder> builders = mapBuilderFromContext(context);
      	List<EntityAffiliation> affiliations = new ArrayList<EntityAffiliation>();
      	if (builders != null) {
  	    	for (EntityAffiliation.Builder builder : builders) {
  	    		affiliations.add(builder.build());
  	    	}
      	}
      	return affiliations;
      }
      
      List<EntityAffiliation.Builder> mapBuilderFromContext(DirContextOperations context) {
          List<EntityAffiliation.Builder> retval = new ArrayList<EntityAffiliation.Builder>();
          final String primaryAffiliationProperty = getConstants().getPrimaryAffiliationLdapProperty();
          final String affiliationProperty = getConstants().getAffiliationLdapProperty();
          debug("Got affiliation ", context.getStringAttribute(primaryAffiliationProperty));
          debug("Got affiliation ", context.getStringAttribute(affiliationProperty));
          
          String primaryAffiliation = context.getStringAttribute(primaryAffiliationProperty);
          
          int affiliationId = 1;
          String affiliationCode = getAffiliationTypeCodeForName(primaryAffiliation);
  
          final EntityAffiliation.Builder aff1 = EntityAffiliation.Builder.create();
          aff1.setAffiliationType(EntityAffiliationType.Builder.create(affiliationCode == null ? "AFLT" : affiliationCode));
          aff1.setCampusCode(getConstants().getDefaultCampusCode());
          aff1.setId("" + affiliationId++);
          aff1.setDefaultValue(true);
          aff1.setActive(true);
          retval.add(aff1);
          
          String[] affiliations = context.getStringAttributes(affiliationProperty);
          // Create an empty array to prevent NPE
          if (affiliations == null) {
              affiliations = new String[] {};
          }
  
          for (String affiliation : affiliations) {
              if (!StringUtils.equals(affiliation, primaryAffiliation)) {
                  affiliationCode = getAffiliationTypeCodeForName(affiliation);
                  if (affiliationCode != null && !hasAffiliation(retval, affiliationCode)) {
                      final EntityAffiliation.Builder aff = EntityAffiliation.Builder.create();
                      aff.setAffiliationType(EntityAffiliationType.Builder.create(affiliationCode));
                      aff.setCampusCode(getConstants().getDefaultCampusCode());
                      aff.setId("" + affiliationId++);
                      aff.setDefaultValue(false);
                      aff.setActive(true);
                      retval.add(aff);
                  }
              }
          }
          
          return retval;
      }
      
      /**
       *
       * Returns the affiliation type code for the given affiliation name. Returns null if the affiliation is not found
       * @param affiliationName
       * @return null if no matching affiliation is found
       */
      protected String getAffiliationTypeCodeForName(String affiliationName) {
         String[] mappings = getConstants().getAffiliationMappings().split(",");
         for (String affilMap : mappings) {
             if (contains(affilMap, affiliationName)) {
                 return affilMap.split("=")[1];
             }
         }
         return null;
     }
 
     protected boolean hasAffiliation(List<EntityAffiliation.Builder> affiliations, String affiliationCode) {
         for (EntityAffiliation.Builder affiliation : affiliations) {
             if (equalsIgnoreCase(affiliation.getAffiliationType().getCode(), affiliationCode)) {
                 return true;
             }
         }
         return false;
     }
 
 }