package uk.ac.ebi.intenz.webapp.controller.modification;
   
   import java.sql.Connection;
   import java.sql.SQLException;
   
   import javax.servlet.http.HttpServletRequest;
   import javax.servlet.http.HttpServletResponse;
   
   import org.apache.log4j.Logger;
  import org.apache.struts.action.ActionForm;
  import org.apache.struts.action.ActionForward;
  import org.apache.struts.action.ActionMapping;
  import org.apache.struts.action.ActionMessage;
  import org.apache.struts.action.ActionMessages;
  
  import uk.ac.ebi.intenz.domain.constants.Status;
  import uk.ac.ebi.intenz.domain.exceptions.EcException;
  import uk.ac.ebi.intenz.mapper.AuditPackageMapper;
  import uk.ac.ebi.intenz.mapper.EventPackageMapper;
  import uk.ac.ebi.intenz.webapp.dtos.EcSearchForm;
  import uk.ac.ebi.intenz.webapp.dtos.EnzymeDTO;
  import uk.ac.ebi.intenz.webapp.exceptions.DeregisterException;
  import uk.ac.ebi.intenz.webapp.utilities.EntryLockSingleton;
  import uk.ac.ebi.intenz.webapp.utilities.UnitOfWork;
  
  /**
   * This Action ...
   *
   * @author Michael Darsow
   * @version $Revision: 1.3 $ $Date: 2008/11/17 17:14:10 $
   */
  public class AmendEntryUpdateAction extends CurationAction {
    private static final Logger LOGGER =
  	  Logger.getLogger(AmendEntryUpdateAction.class.getName());
    private final static String SEARCH_BY_EC_ACTION_FWD = "searchEc";
  
      @Override
    public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request,
                                 HttpServletResponse response) throws Exception {
      // Do standard checks in the parent's execute method.
      ActionForward forward = super.execute(mapping, form, request, response);
      if (forward != null) return forward;
  
      ActionMessages errors = new ActionMessages();
      EnzymeDTO enzymeDTO = (EnzymeDTO) form;
  
      // Validate the entry's lists.
  //    IntEnzValidations.validateEnzymeDTOLists(enzymeDTO, errors);
  //    if (!errors.isEmpty()) {
  //      saveErrors(request, errors);
  //      return mapping.getInputForward();
  //    }
      
      Connection con = (Connection) request.getSession().getAttribute("connection");
      EntryLockSingleton els = (EntryLockSingleton) request.getSession().getServletContext().getAttribute("entryLock");
      UnitOfWork unitOfWork = (UnitOfWork) request.getSession().getAttribute("uow");
      try {
        // Set the standard remark in the audit tables.
        AuditPackageMapper auditPackageMapper = new AuditPackageMapper();
        auditPackageMapper.setRemark(AuditPackageMapper.STANDARD_REMARK, con);
  
        // Store event.
        if (!enzymeDTO.getStatusCode().equals(Status.PRELIMINARY.getCode())){
            EventPackageMapper eventPackageMapper = new EventPackageMapper();
            eventPackageMapper.updateFutureModificationEvent(Integer.parseInt(enzymeDTO.getLatestHistoryEventGroupId()),
                                                         Integer.parseInt(enzymeDTO.getLatestHistoryEventId()),
                                                         enzymeDTO.getStatusCode(), con);
        }
        // Commit
        LOGGER.info("Committing form data.");
        unitOfWork.commit(enzymeDTO, con);
        LOGGER.info("Data subimtted");
  
        con.commit();
        
        LOGGER.info("Amend event (update) finished.");
      } catch (SQLException e){
          con.rollback();
          throw e;
      } catch (EcException e) {
        errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("errors.application.ec.invalid", enzymeDTO.getTransferredEc()));
        saveErrors(request, errors);
        keepToken(request);
        return mapping.getInputForward();
      } catch (DeregisterException e) {
        LOGGER.error(e.getMessage());
        // Create standard error message (see 'struts_config.xml').
        throw e;
      } finally { // release lock
        els.releaseLock(enzymeDTO.getId());
        LOGGER.info("Lock of EC " + enzymeDTO.getEc() + " (ID: " + enzymeDTO.getEc() + " released.");
      }
  
      // Forward to 'searchEc' Action to show both entries.
      LOGGER.info("Searching for EC " + enzymeDTO.getEc());
      EcSearchForm ecSearchForm = new EcSearchForm();
      ecSearchForm.setEc(enzymeDTO.getEc());
      request.setAttribute("ecSearchForm", ecSearchForm);
      return mapping.findForward(SEARCH_BY_EC_ACTION_FWD);
   }
 
 }