/**
    * Copyright 2005-2011 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.service.impl;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.commons.collections.CollectionUtils;
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.exception.RiceIllegalArgumentException;
  import org.kuali.rice.kim.api.identity.entity.Entity;
  import org.kuali.rice.kim.api.identity.entity.EntityDefault;
  import org.kuali.rice.kim.api.identity.principal.EntityNamePrincipalName;
  import org.kuali.rice.kim.api.identity.principal.Principal;
  import org.kuali.rice.kim.api.identity.privacy.EntityPrivacyPreferences;
  import org.kuali.rice.kim.api.identity.IdentityService;
  import org.kuali.rice.kim.impl.identity.IdentityServiceImpl;
  
  import org.kuali.rice.kim.dao.LdapPrincipalDao;
  
  /**
   * Implementation of {@link IdentityService} that communicates with and serves information
   * from the UA Enterprise Directory Service.
   * 
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class LdapIdentityDelegateServiceImpl extends IdentityServiceImpl {
      private LdapPrincipalDao principalDao;
  
      @Override
  	public Entity getEntity(String entityId) {
          if (StringUtils.isBlank(entityId)) {
              throw new RiceIllegalArgumentException("entityId is blank");
          }
  
          Entity edsInfo = getPrincipalDao().getEntity(entityId);
          if (edsInfo != null) {
              return edsInfo;
          } else {
              return super.getEntity(entityId);
          }
  	}
  	
  	/**
  	 * Overridden to populate this information from the LdapPrincipalDao
  	 */
      @Override
  	public Entity getEntityByPrincipalId(String principalId) {
          if (StringUtils.isBlank(principalId)) {
              throw new RiceIllegalArgumentException("principalId is blank");
          }
  
          Entity edsInfo = getPrincipalDao().getEntityByPrincipalId(principalId);
          if (edsInfo != null) {
              return edsInfo;
          } else {
              return super.getEntityByPrincipalId(principalId);
          }
  	}
  	
      @Override
  	public Entity getEntityByPrincipalName(String principalName) {
          if (StringUtils.isBlank(principalName)) {
              throw new RiceIllegalArgumentException("principalName is blank");
          }
  
          final Entity edsInfo = getPrincipalDao().getEntityByPrincipalName(principalName);
          if (edsInfo != null) {
              return edsInfo;
          } else {
              return super.getEntityByPrincipalName(principalName);
          }
  	}
  	
      @Override
  	public EntityDefault getEntityDefault(String entityId) {
          if (StringUtils.isBlank(entityId)) {
              throw new RiceIllegalArgumentException("entityId is blank");
          }
  
          EntityDefault edsInfo = getPrincipalDao().getEntityDefault(entityId);
          if (edsInfo != null) {
              return edsInfo;
          } 
         else {
             return super.getEntityDefault(entityId);
         }
 	}
 	
     @Override
 	public EntityDefault getEntityDefaultByPrincipalId(String principalId) {
         if (StringUtils.isBlank(principalId)) {
             throw new RiceIllegalArgumentException("principalId is blank");
         }
 
         final EntityDefault retval = getPrincipalDao().getEntityDefaultByPrincipalId(principalId);
         if (retval != null) {
             return retval;
         }
         else {
             return super.getEntityDefaultByPrincipalId(principalId);
         }
 	}
 	
     @Override
 	public EntityDefault getEntityDefaultByPrincipalName(String principalName) {
         if (StringUtils.isBlank(principalName)) {
             throw new RiceIllegalArgumentException("principalName is blank");
         }
 
         final EntityDefault retval = getPrincipalDao().getEntityDefaultByPrincipalName(principalName);
         if (retval != null) {
             return retval;
         }
         else {
             return super.getEntityDefaultByPrincipalName(principalName);
         }
 	}
 	
     /**
      * Password lookups not supported by EDS. Use Natural Authentication strategies instead
      * of this if that's what you need.
      *
      */
     @Override
     @Deprecated
 	public Principal getPrincipalByPrincipalNameAndPassword(String principalName, String password) {
         if (StringUtils.isBlank(principalName)) {
             throw new RiceIllegalArgumentException("principalName is blank");
         }
 
         //not validating password
 
         return getPrincipalByPrincipalName(principalName);
     }
 	
     @Override
 	public EntityPrivacyPreferences getEntityPrivacyPreferences(String entityId) {
         if (StringUtils.isBlank(entityId)) {
             throw new RiceIllegalArgumentException("entityId is blank");
         }
 
         return getPrincipalDao().getEntityPrivacyPreferences(entityId);
 	}
 
     @Override
 	public Principal getPrincipal(String principalId) {
         if (StringUtils.isBlank(principalId)) {
             throw new RiceIllegalArgumentException("principalId is blank");
         }
 
         final Principal edsInfo = getPrincipalDao().getPrincipal(principalId);
             if (edsInfo != null) {
 	        return edsInfo;
 	    } else {
 	        return super.getPrincipal(principalId);
 	    }
     }
 
     @Override
 	public Principal getPrincipalByPrincipalName(String principalName) {
         if (StringUtils.isBlank(principalName)) {
             throw new RiceIllegalArgumentException("principalName is blank");
         }
 
         final Principal edsInfo = getPrincipalDao().getPrincipalByName(principalName);
         if (edsInfo != null) {
             return edsInfo;
         } else {
             return super.getPrincipalByPrincipalName(principalName);
         }
     }
 
     public void setPrincipalDao(LdapPrincipalDao principalDao) {
         this.principalDao = principalDao;
     }
 
     public LdapPrincipalDao getPrincipalDao() {
         return principalDao;
     } 
 }