package fr.tiogars.inception.domains.domaintemplate.services;
   
   import java.io.IOException;
   import java.util.List;
   import java.util.Optional;
   
   import org.springframework.stereotype.Service;
   import org.springframework.transaction.annotation.Transactional;
   
  import fr.tiogars.inception.domains.domaintemplate.models.DomainTemplate;
  
  /** Generates a printable PDF for one active DomainTemplate. */
  @Service
  public class DomainTemplatePrintService {
  
      private final DomainTemplateFindByIdService findByIdService;
      private final DomainTemplatePdfRenderer renderer;
  
      public DomainTemplatePrintService(DomainTemplateFindByIdService findByIdService, DomainTemplatePdfRenderer renderer) {
          this.findByIdService = findByIdService;
          this.renderer = renderer;
      }
  
      /**
       * Prints an active record.
       *
       * @param id persistent identifier
       * @return PDF bytes, or empty if the record was not found
       * @throws IOException when the PDF cannot be generated
       */
      @Transactional(readOnly = true)
      public Optional<byte[]> print(Long id) throws IOException {
          Optional<DomainTemplate> template = findByIdService.findById(id);
          if (template.isEmpty()) {
              return Optional.empty();
          }
          return Optional.of(renderer.render("DomainTemplate", List.of(template.get())));
      }
  }