class PatientUpdateFromPDSJob

# File app/jobs/patient_update_from_pds_job.rb, line 9
def perform(patient, search_results = [])
  raise MissingNHSNumber if patient.nhs_number.nil? && search_results.empty?

  unique_nhs_number =
    (
      if search_results.present?
        get_unique_nhs_number(search_results)
      else
        patient.nhs_number
      end
    )
  return unless unique_nhs_number

  pds_patient = PDS::Patient.find(unique_nhs_number)
  return unless pds_patient

  if pds_patient.nhs_number != patient.nhs_number
    if (
         existing_patient =
           Patient.find_by(nhs_number: pds_patient.nhs_number)
       )
      PatientMerger.call(to_keep: existing_patient, to_destroy: patient)
      existing_patient.update_from_pds!(pds_patient)

      if search_results.present?
        import_search_results(existing_patient, search_results)
      end
    else
      patient.nhs_number = pds_patient.nhs_number
      patient.update_from_pds!(pds_patient)

      if search_results.present?
        import_search_results(patient, search_results)
      end
    end
  else
    patient.update_from_pds!(pds_patient)
  end
rescue NHS::PDS::PatientNotFound
  patient.update!(nhs_number: nil)
  PDSCascadingSearchJob.perform_later(patient)
rescue NHS::PDS::InvalidatedResource, NHS::PDS::InvalidNHSNumber
  patient.invalidate!
  PDSCascadingSearchJob.perform_later(patient)
end