/*
    * Copyright 2008 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 1.0 (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/ecl1.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.student.lum.course.service.assembler;
  
  import org.kuali.student.common.assembly.BOAssembler;
  import org.kuali.student.common.assembly.BaseDTOAssemblyNode;
  import org.kuali.student.common.assembly.BaseDTOAssemblyNode.NodeOperation;
  import org.kuali.student.common.assembly.data.AssemblyException;
  import org.kuali.student.common.util.UUIDHelper;
  import org.kuali.student.lum.course.dto.ActivityInfo;
  import org.kuali.student.lum.lu.dto.CluInfo;
  import org.kuali.student.lum.lu.service.LuService;
  
  /**
   * Assembles/Disassembles ActivityInfo DTO from/To CluInfo 
   * 
   * @author Kuali Student Team
   *
   */
  public class ActivityAssembler implements BOAssembler<ActivityInfo, CluInfo> {
  
      private LuService luService;
      
  	@Override
  	public ActivityInfo assemble(CluInfo clu, ActivityInfo activity, boolean shallowBuild) {
  		if(clu == null){
  			return null;
  		}
  		
  		ActivityInfo activityInfo = (null != activity) ? activity : new ActivityInfo();
  	    
  		activityInfo.setId(clu.getId());
  		activityInfo.setActivityType(clu.getType());
  		activityInfo.setState(clu.getState());
  		activityInfo.setDefaultEnrollmentEstimate(clu.getDefaultEnrollmentEstimate());
  		activityInfo.setDuration(clu.getStdDuration());
  		activityInfo.setContactHours(clu.getIntensity());
  		activityInfo.setMetaInfo(clu.getMetaInfo());
          activityInfo.setAttributes(clu.getAttributes());
  		return activityInfo;
  	}
  
  	@Override
  	public BaseDTOAssemblyNode<ActivityInfo,CluInfo> disassemble(
  			ActivityInfo activity, NodeOperation operation) throws AssemblyException {
  		if (activity==null) {
  			//FIXME Unsure now if this is an exception or just return null or empty assemblyNode 
  			throw new AssemblyException("Activity can not be null");
  		}
  		if (NodeOperation.CREATE != operation && null == activity.getId()) {
  			throw new AssemblyException("Activity's id can not be null");
  		}
  		
  		BaseDTOAssemblyNode<ActivityInfo,CluInfo> result = new BaseDTOAssemblyNode<ActivityInfo,CluInfo>(this);
  		
  		CluInfo clu;
          try {
              clu = (NodeOperation.UPDATE == operation) ? luService.getClu(activity.getId()) : new CluInfo();
          } catch (Exception e) {
              throw new AssemblyException("Error retrieving activity learning unit during update", e);
          }
  	
  		//Copy all fields 
  		clu.setId(UUIDHelper.genStringUUID(activity.getId()));//Create the id if it's not there already(important for creating relations)
  		clu.setType(activity.getActivityType());
  		clu.setState(activity.getState());
  		clu.setDefaultEnrollmentEstimate(activity.getDefaultEnrollmentEstimate());
  		clu.setStdDuration(activity.getDuration());
  		clu.setIntensity(activity.getContactHours());
  		clu.setMetaInfo(activity.getMetaInfo());
  		clu.setAttributes(activity.getAttributes());
  				
  		//Add the Clu to the result 
  		result.setNodeData(clu);
  
  		// Add refernce to Activity
  		result.setBusinessDTORef(activity);
  		
  		result.setOperation(operation);
  
  		return result;
  	}
  
      public void setLuService(LuService luService) {
          this.luService = luService;
      }
 
     public LuService getLuService() {
         return luService;
     }
 }