/*

  * Copyright 2007 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.program.service.assembler;

 import java.util.List;

 import org.apache.log4j.Logger;

 import org.kuali.student.core.assembly.BOAssembler;

 import org.kuali.student.core.assembly.BaseDTOAssemblyNode;

 import org.kuali.student.core.assembly.BaseDTOAssemblyNode.NodeOperation;

 import org.kuali.student.core.assembly.data.AssemblyException;

 import org.kuali.student.core.dto.AmountInfo;

 import org.kuali.student.core.exceptions.DoesNotExistException;

 import org.kuali.student.lum.lu.dto.CluInfo;

 import org.kuali.student.lum.lu.service.LuService;

 import org.kuali.student.lum.program.dto.ProgramVariationInfo;

 import org.kuali.student.lum.service.assembler.CluAssemblerUtils;

 /**

  * @author KS

  *

  */

 public class ProgramVariationAssembler implements BOAssembler<ProgramVariationInfo, CluInfo> {

     final static Logger LOG = Logger.getLogger(ProgramVariationAssembler.class);

     private LuService luService;

     private CluAssemblerUtils cluAssemblerUtils;

     private ProgramAssemblerUtils programAssemblerUtils;

     @Override

     public ProgramVariationInfo assemble(CluInfo clu, ProgramVariationInfo programVariation, boolean shallowBuild) throws AssemblyException {

         ProgramVariationInfo pvInfo = (null != programVariation) ? programVariation : new ProgramVariationInfo();

         // Copy all the data from the clu to the programvariation

         programAssemblerUtils.assembleBasics(clu, pvInfo);

         programAssemblerUtils.assembleIdentifiers(clu, pvInfo);

         programAssemblerUtils.assembleBasicAdminOrgs(clu, pvInfo);

         programAssemblerUtils.assembleFullOrgs(clu, pvInfo);

         programAssemblerUtils.assembleAtps(clu, pvInfo);

         programAssemblerUtils.assembleLuCodes(clu, pvInfo);

         programAssemblerUtils.assemblePublications(clu, pvInfo);

         if (!shallowBuild) {

                 programAssemblerUtils.assembleRequirements(clu, pvInfo);

                 pvInfo.setResultOptions(programAssemblerUtils.assembleResultOptions(clu.getId()));

             pvInfo.setLearningObjectives(cluAssemblerUtils.assembleLos(clu.getId(), shallowBuild));

         }

         pvInfo.setIntensity((null != clu.getIntensity()) ? clu.getIntensity().getUnitType() : null);

         pvInfo.setStdDuration(clu.getStdDuration());

         pvInfo.setCampusLocations(clu.getCampusLocations());  

         pvInfo.setEffectiveDate(clu.getEffectiveDate());

         pvInfo.setDescr(clu.getDescr());

         pvInfo.setVersionInfo(clu.getVersionInfo());

         return pvInfo;

     }

     @Override

     public BaseDTOAssemblyNode<ProgramVariationInfo, CluInfo> disassemble(ProgramVariationInfo variation, NodeOperation operation) throws AssemblyException {

             BaseDTOAssemblyNode<ProgramVariationInfo, CluInfo> result = new BaseDTOAssemblyNode<ProgramVariationInfo, CluInfo>(this);

             if (variation == null) {

                         // FIXME Unsure now if this is an exception or just return null or

                         // empty assemblyNode

                     LOG.error("Variation to disassemble is null!");

                         throw new AssemblyException("Variation can not be null");

                 }

                 CluInfo clu;

                 try {

                         clu = (NodeOperation.UPDATE == operation) ? luService.getClu(variation.getId()) : new CluInfo();

         } catch (Exception e) {

                         throw new AssemblyException("Error getting existing learning unit during variation update", e);

         } 

         boolean stateChanged = NodeOperation.UPDATE == operation && variation.getState() != null && !variation.getState().equals(clu.getState());

         programAssemblerUtils.disassembleBasics(clu, variation);

         if (variation.getId() == null)

                 variation.setId(clu.getId());

         programAssemblerUtils.disassembleIdentifiers(clu, variation, operation);

         programAssemblerUtils.disassembleAdminOrgs(clu, variation, operation);

         programAssemblerUtils.disassembleAtps(clu, variation, operation);

         programAssemblerUtils.disassembleLuCodes(clu, variation, operation);        

         programAssemblerUtils.disassemblePublications(clu, variation, operation, result);

         if(variation.getProgramRequirements() != null && !variation.getProgramRequirements().isEmpty()) {

                 programAssemblerUtils.disassembleRequirements(clu, variation, operation, result, stateChanged);

         }

         if (variation.getResultOptions() != null) {

             disassembleResultOptions(variation, operation, result);           

         }

         if (variation.getLearningObjectives() != null) {

             disassembleLearningObjectives(variation, operation, result);

         }

                 AmountInfo intensity = new AmountInfo();

                 intensity.setUnitType(variation.getIntensity());

                 clu.setIntensity(intensity);

                 clu.setStdDuration(variation.getStdDuration());

         clu.setCampusLocations(variation.getCampusLocations());

         clu.setEffectiveDate(variation.getEffectiveDate());

         clu.setDescr(variation.getDescr());

         clu.setVersionInfo(variation.getVersionInfo());        

                 // Add the Clu to the result

                 result.setNodeData(clu);

                 result.setOperation(operation);

                 result.setBusinessDTORef(variation);

                 return result;

     }

     private void disassembleLearningObjectives(ProgramVariationInfo variation, NodeOperation operation, BaseDTOAssemblyNode<ProgramVariationInfo, CluInfo> result) throws AssemblyException {

         try {

             List<BaseDTOAssemblyNode<?, ?>> loResults = cluAssemblerUtils.disassembleLos(variation.getId(), variation.getState(),  variation.getLearningObjectives(), operation);

             if (loResults != null) {

                 result.getChildNodes().addAll(loResults);

             }

         } catch (DoesNotExistException e) {

         } catch (Exception e) {

             throw new AssemblyException("Error while disassembling los", e);

         }

     }

     private void disassembleResultOptions(ProgramVariationInfo variation, NodeOperation operation, BaseDTOAssemblyNode<ProgramVariationInfo, CluInfo> result) throws AssemblyException {

         BaseDTOAssemblyNode<?, ?> resultOptions = cluAssemblerUtils.disassembleCluResults(

                         variation.getId(), variation.getState(), variation.getResultOptions(), operation, ProgramAssemblerConstants.DEGREE_RESULTS, "Result options", "Result option");

         if (resultOptions != null) {

             result.getChildNodes().add(resultOptions);           

         }

     }

     // Spring setter

     public void setLuService(LuService luService) {

         this.luService = luService;

     }

     public void setCluAssemblerUtils(CluAssemblerUtils cluAssemblerUtils) {

         this.cluAssemblerUtils = cluAssemblerUtils;

     }

     public void setProgramAssemblerUtils(ProgramAssemblerUtils programAssemblerUtils) {

         this.programAssemblerUtils = programAssemblerUtils;

     }

 }