package org.kuali.student.lum.program.server;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Map;

 import org.kuali.student.common.ui.server.gwt.AbstractDataService;

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

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

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

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

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

 import org.kuali.student.core.search.dto.SearchParam;

 import org.kuali.student.core.search.dto.SearchRequest;

 import org.kuali.student.core.search.dto.SearchResult;

 import org.kuali.student.core.search.dto.SearchResultCell;

 import org.kuali.student.core.search.dto.SearchResultRow;

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

 import org.kuali.student.lum.program.client.ProgramClientConstants;

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

 import org.kuali.student.lum.program.service.ProgramService;

 /**

  * @author Jim

  */

 public class CoreProgramDataService extends AbstractDataService {

     private static final long serialVersionUID = 1L;

     private ProgramService programService;

     private LuService luService;

     @Override

     protected String getDefaultWorkflowDocumentType() {

         return null;

     }

     @Override

     protected String getDefaultMetaDataState() {

         return null;

     }

     @Override

     protected Object get(String id) throws Exception {

             if (id==null || id.isEmpty()){

             return findCurrentCoreProgram();

             } else {

                     return programService.getCoreProgram(id);

             }

     }

     @Override

     protected Object save(Object dto, Map<String, Object> properties) throws Exception {

         if (dto instanceof CoreProgramInfo) {

             CoreProgramInfo cpInfo = (CoreProgramInfo) dto;

             if (cpInfo.getId() == null && cpInfo.getVersionInfo() != null) {

                     String coreVersionIndId = cpInfo.getVersionInfo().getVersionIndId();

                     cpInfo = programService.createNewCoreProgramVersion(coreVersionIndId, "New core program version");

             } else if (cpInfo.getId() == null) {

                 cpInfo = programService.createCoreProgram(cpInfo);

             } else {

                 cpInfo = programService.updateCoreProgram(cpInfo);

             }

             return cpInfo;

         } else {

             throw new InvalidParameterException("Only persistence of CoreProgram is supported by this DataService implementation.");

         }

     }

     @Override

     protected Class<?> getDtoClass() {

         return CoreProgramInfo.class;

     }

     private CoreProgramInfo findCurrentCoreProgram() throws MissingParameterException, InvalidParameterException, DoesNotExistException, PermissionDeniedException, OperationFailedException {

                     SearchRequest request = new SearchRequest();

         //TODO find a better way to get this search, param and resultcolumn names

         CoreProgramInfo core = new CoreProgramInfo();

         String coreProgramId = null;

             request.setSearchKey("lu.search.mostCurrent.union");

         List<SearchParam> searchParams = new ArrayList<SearchParam>();

         SearchParam qpv1 = new SearchParam();

         qpv1.setKey("lu.queryParam.luOptionalType");

         qpv1.setValue(ProgramClientConstants.CORE_PROGRAM);

         searchParams.add(qpv1);

         request.setParams(searchParams);

         SearchResult searchResult = luService.search(request);

         if (searchResult.getRows().size() > 0) {

             for(SearchResultRow srrow : searchResult.getRows()){

                 List<SearchResultCell> srCells = srrow.getCells();

                 if(srCells != null && srCells.size() > 0){

                     for(SearchResultCell srcell : srCells){

                         if (srcell.getKey().equals("lu.resultColumn.cluId")) {

                             coreProgramId = srcell.getValue();

                             break;

                         }

                     }

                 }

             }

         }

         if (coreProgramId != null) {

             core = programService.getCoreProgram(coreProgramId);

         }

         return core;

     }

     public void setProgramService(ProgramService programService) {

         this.programService = programService;

     }

     public void setLuService(LuService luService) {

         this.luService = luService;

     }

 }