package org.kuali.student.lum.program.server;
   
   import java.util.List;
   import java.util.Map;
   
   import org.kuali.student.common.dto.DtoConstants;
   import org.kuali.student.common.exceptions.InvalidParameterException;
   import org.kuali.student.common.exceptions.OperationFailedException;
   import org.kuali.student.common.ui.server.gwt.AbstractDataService;
  import org.kuali.student.lum.lu.service.LuService;
  import org.kuali.student.lum.program.client.ProgramClientConstants;
  import org.kuali.student.lum.program.dto.CredentialProgramInfo;
  import org.kuali.student.lum.program.service.ProgramService;
  
  /**
   * @author Igor
   */
  public class CredentialProgramDataService 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 (ProgramClientConstants.CREDENTIAL_PROGRAM_TYPES.contains(id)){
              List<String> credIds = luService.getCluIdsByLuType(id, DtoConstants.STATE_ACTIVE);
              if (null == credIds || credIds.size() != 1) {
                  throw new OperationFailedException("A single credential program of type " + id + " is required; database contains " +
                                                      (null == credIds ? "0" : credIds.size() +
                                                      "."));
              }
              return programService.getCredentialProgram(credIds.get(0));
          } else {
          	return programService.getCredentialProgram(id);
          }
      }
  
      @Override
      protected Object save(Object dto, Map<String, Object> properties) throws Exception {
          if (dto instanceof CredentialProgramInfo) {
              CredentialProgramInfo cpInfo = (CredentialProgramInfo) dto;
              if (cpInfo.getId() == null && cpInfo.getVersionInfo() != null) {
              	String credentialVersionIndId = cpInfo.getVersionInfo().getVersionIndId();
              	cpInfo = programService.createNewCredentialProgramVersion(credentialVersionIndId, "New credential program version");
              } else if (cpInfo.getId() == null) {
                  cpInfo = programService.createCredentialProgram(cpInfo);
              } else {
                  cpInfo = programService.updateCredentialProgram(cpInfo);
              }
              return cpInfo;
          } else {
              throw new InvalidParameterException("Only persistence of CredentialProgram is supported by this DataService implementation.");
          }
      }
  
      @Override
      protected Class<?> getDtoClass() {
          return CredentialProgramInfo.class;
      }
  
      public void setProgramService(ProgramService programService) {
          this.programService = programService;
      }
  
      public void setLuService(LuService luService) {
          this.luService = luService;
      }
  }