package fr.tiogars.inception.domains.domaintemplate.services;
   
   import java.util.Optional;
   
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.stereotype.Service;
   import org.springframework.transaction.annotation.Transactional;
   
   import fr.tiogars.inception.domains.domaintemplate.entities.DomainTemplateEntity;
  import fr.tiogars.inception.domains.domaintemplate.models.DomainTemplate;
  import fr.tiogars.inception.domains.domaintemplate.models.UpdateDomainTemplateRequest;
  import fr.tiogars.inception.domains.domaintemplate.repositories.DomainTemplateRepository;
  
  /** Updates existing DomainTemplates. */
  @Service
  public class DomainTemplateUpdateService {
  
      private final DomainTemplateRepository repository;
  
      @Autowired
      public DomainTemplateUpdateService(DomainTemplateRepository repository) {
          this.repository = repository;
      }
  
      /**
       * Updates the mutable fields of a DomainTemplate.
       *
       * @param id      persistent identifier
       * @param request replacement business data
       * @return updated template, or an empty optional when it does not exist
       */
      @Transactional
      public Optional<DomainTemplate> update(Long id, UpdateDomainTemplateRequest request) {
          return repository.findById(id)
                  .map(existing -> {
                      existing.update(request.label(), request.description());
                      return toRecord(repository.saveAndFlush(existing));
                  });
      }
  
      private static DomainTemplate toRecord(DomainTemplateEntity entity) {
          return new DomainTemplate(
                  entity.getId(),
                  entity.getCode(),
                  entity.getLabel(),
                  entity.getDescription(),
                  entity.getCreatedDate(),
                  entity.getLastModifiedDate(),
                  entity.getCreatedBy(),
                  entity.getLastModifiedBy());
      }
  }