/**
    * 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.krms.impl.repository;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.exception.RiceIllegalArgumentException;
  import org.kuali.rice.krad.data.DataObjectService;
  import org.kuali.rice.krad.data.PersistenceOption;
  import org.kuali.rice.krms.api.repository.language.NaturalLanguageUsage;
  
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map;
  
  import static org.kuali.rice.krms.impl.repository.BusinessObjectServiceMigrationUtils.findMatching;
  import static org.kuali.rice.krms.impl.repository.BusinessObjectServiceMigrationUtils.findSingleMatching;
  
  /**
   * Implementation of the @{link NaturalLanguageUsageBoService} interface for accessing  {@link NaturalLanguageUsageBo} related business objects.
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   * 
   */
  public final class NaturalLanguageUsageBoServiceImpl
      implements NaturalLanguageUsageBoService {
  
      private DataObjectService dataObjectService;
      private KrmsAttributeDefinitionService attributeDefinitionService;
  
      /**
       * Sets the value of DataObjectService to the given value.
       * 
       * @param dataObjectService the DataObjectService value to set.
       * 
       */
      public void setDataObjectService(DataObjectService dataObjectService) {
          this.dataObjectService = dataObjectService;
      }
  
      public void setAttributeDefinitionService(KrmsAttributeDefinitionService attributeDefinitionService) {
          this.attributeDefinitionService = attributeDefinitionService;
      }
  
      public KrmsAttributeDefinitionService getAttributeDefinitionService() {
          if (attributeDefinitionService == null) {
              attributeDefinitionService = KrmsRepositoryServiceLocator.getKrmsAttributeDefinitionService();
          }
  
          return attributeDefinitionService;
      }
  
      @Override
      public NaturalLanguageUsage createNaturalLanguageUsage(NaturalLanguageUsage naturalLanguageUsage) {
          incomingParamCheck(naturalLanguageUsage , "naturalLanguageUsage");
          if (StringUtils.isNotEmpty(naturalLanguageUsage.getId())) {
              final String naturalLanguageUsageIdKey = naturalLanguageUsage.getId();
              final NaturalLanguageUsage existing = getNaturalLanguageUsage(naturalLanguageUsageIdKey);
  
              if (existing != null) {
                  throw new IllegalStateException("the NaturalLanguageUsage to create already exists: " + naturalLanguageUsage);
              }
          } else {
              final NaturalLanguageUsage existing =
                  getNaturalLanguageUsageByName(naturalLanguageUsage.getNamespace(), naturalLanguageUsage.getName());
  
              if (existing != null) {
                  throw new IllegalStateException("the NaturalLanguageUsage to create already exists: " + naturalLanguageUsage);
              }
          }
  
          NaturalLanguageUsageBo bo = dataObjectService.save(from(naturalLanguageUsage), PersistenceOption.FLUSH);
  
          return NaturalLanguageUsageBo.to(bo);
      }
  
      @Override
      public NaturalLanguageUsage getNaturalLanguageUsage(String naturalLanguageUsageId) {
          incomingParamCheck(naturalLanguageUsageId , "naturalLanguageUsageId");
          NaturalLanguageUsageBo bo = dataObjectService.find(NaturalLanguageUsageBo.class, naturalLanguageUsageId);
  
          return NaturalLanguageUsageBo.to(bo);
      }
  
     @Override
     public NaturalLanguageUsage getNaturalLanguageUsageByName(String namespace, String name) {
         if (StringUtils.isBlank(namespace)) {
             throw new RiceIllegalArgumentException("namespace was a null or blank value");
         }
 
         if (StringUtils.isBlank(name)) {
             throw new RiceIllegalArgumentException("name was a null or blank value");
         }
 
         final Map<String, Object> map = new HashMap<String, Object>();
         map.put("namespace", namespace);
         map.put("name", name);
 
         NaturalLanguageUsageBo usageBo = findSingleMatching(dataObjectService, NaturalLanguageUsageBo.class, map);
 
         return NaturalLanguageUsageBo.to(usageBo);
     }
 
     @Override
     public void updateNaturalLanguageUsage(NaturalLanguageUsage naturalLanguageUsage) {
         incomingParamCheck(naturalLanguageUsage , "naturalLanguageUsage");
         final NaturalLanguageUsage existing = getNaturalLanguageUsage(naturalLanguageUsage.getId());
 
         if (existing == null) {
             throw new IllegalStateException("the NaturalLanguageUsage to update does not exists: " + naturalLanguageUsage);
         }
 
         final NaturalLanguageUsage toUpdate;
 
         if (!existing.getId().equals(naturalLanguageUsage.getId())) {
             // if passed in id does not match existing id, correct it
             final NaturalLanguageUsage.Builder builder = NaturalLanguageUsage.Builder.create(naturalLanguageUsage);
             builder.setId(existing.getId());
             toUpdate = builder.build();
         } else {
             toUpdate = naturalLanguageUsage;
         }
 
         // copy all updateable fields to bo
         NaturalLanguageUsageBo boToUpdate = from(toUpdate);
 
         // update the rule and create new attributes
          dataObjectService.save(boToUpdate, PersistenceOption.FLUSH);
     }
 
     @Override
     public void deleteNaturalLanguageUsage(String naturalLanguageUsageId) {
         incomingParamCheck(naturalLanguageUsageId , "naturalLanguageUsageId");
         final NaturalLanguageUsage existing = getNaturalLanguageUsage(naturalLanguageUsageId);
 
         if (existing == null) {
             throw new IllegalStateException("the NaturalLanguageUsage to delete does not exists: " + naturalLanguageUsageId);
         }
 
         dataObjectService.delete(from(existing));
     }
 
     @Override
     public List<NaturalLanguageUsage> findNaturalLanguageUsagesByName(String name) {
         if (org.apache.commons.lang.StringUtils.isBlank(name)) {
             throw new IllegalArgumentException("name is null or blank");
         }
 
         final Map<String, Object> map = new HashMap<String, Object>();
         map.put("name", name);
         List<NaturalLanguageUsageBo> bos = findMatching(dataObjectService, NaturalLanguageUsageBo.class, map);
 
         return convertBosToImmutables(bos);
     }
 
     @Override
     public List<NaturalLanguageUsage> findNaturalLanguageUsagesByDescription(String description) {
         if (org.apache.commons.lang.StringUtils.isBlank(description)) {
             throw new IllegalArgumentException("description is null or blank");
         }
 
         final Map<String, Object> map = new HashMap<String, Object>();
         map.put("description", description);
         List<NaturalLanguageUsageBo> bos = findMatching(dataObjectService, NaturalLanguageUsageBo.class, map);
 
         return convertBosToImmutables(bos);
     }
 
     @Override
     public List<NaturalLanguageUsage> findNaturalLanguageUsagesByNamespace(String namespace) {
         if (org.apache.commons.lang.StringUtils.isBlank(namespace)) {
             throw new IllegalArgumentException("namespace is null or blank");
         }
 
         final Map<String, Object> map = new HashMap<String, Object>();
         map.put("namespace", namespace);
         List<NaturalLanguageUsageBo> bos = findMatching(dataObjectService, NaturalLanguageUsageBo.class, map);
 
         return convertBosToImmutables(bos);
     }
 
     public List<NaturalLanguageUsage> convertBosToImmutables(final Collection<NaturalLanguageUsageBo> naturalLanguageUsageBos) {
         List<NaturalLanguageUsage> immutables = new LinkedList<NaturalLanguageUsage>();
 
         if (naturalLanguageUsageBos != null) {
             NaturalLanguageUsage immutable = null;
             for (NaturalLanguageUsageBo bo : naturalLanguageUsageBos ) {
                 immutable = to(bo);
                 immutables.add(immutable);
             }
         }
 
         return Collections.unmodifiableList(immutables);
     }
 
     @Override
     public NaturalLanguageUsage to(NaturalLanguageUsageBo naturalLanguageUsageBo) {
         return NaturalLanguageUsageBo.to(naturalLanguageUsageBo);
     }
 
     public NaturalLanguageUsageBo from(NaturalLanguageUsage naturalLanguageUsage) {
         return NaturalLanguageUsageBo.from(naturalLanguageUsage);
     }
 
     private void incomingParamCheck(Object object, String name) {
         if (object == null) {
             throw new IllegalArgumentException(name + " was null");
         } else if (object instanceof String
                 && StringUtils.isBlank((String)object)) {
             throw new IllegalArgumentException(name + " was blank");
         }
     }
 }