# report/models/reflex_test_config.py
@classmethod
def validate_payload(cls, payload, lab_id):
    # Required fields
    if not payload.get("test_id"):
        raise ValidationError("test_id is required")
    
    # Parameter rules validation
    cls._validate_range_parameter_rules(rules)
    cls._validate_reflex_tests_uniqueness(rules)
    cls._validate_test_ids_exist(test_id, reflex_ids, lab_id)

# report/models/reflex_test_config.py
@classmethod
def get_reflex_test_configs(cls, lab_id, reflex_test_id=None):
    qs = cls.objects.filter(
        lab_id=lab_id, is_active=True
    ).select_related(
        "test"
    ).prefetch_related(
        "reflextestparameterrules_set",
        "reflextestparameterrules_set__reflex_tests"
    )
    return qs

# report/models/reflex_test_config.py
@classmethod
@transaction.atomic
def update_reflex_test_config(cls, payload, reflex_test_id, session):
    instance = cls.objects.get(id=reflex_test_id)
    # Delete old rules
    instance.reflextestparameterrules_set.all().delete()
    # Create new rules
    cls.create_parameter_rules(instance, rules)
    instance.add_activity_log("updated", session=session)

# report/views/smart_report.py
class SmartReportView(GenericView):
    
    @transaction.atomic
    def get(self, request, smart_report_id, bill_id, *args, **kwargs):
        smart_report = SmartReport.objects.get(id=smart_report_id)
        bill = Billing.objects.get(pk=bill_id)
        
        html = smart_report.generate_report(
            request, bill, is_pdf=False
        )
        
        return HttpResponse(html)

# report/models/lab_report_relation.py
def after_save(self, *args, **kwargs):
    # Activity logging
    # ES sync (if enabled)
    # Webhook triggers

# Use department filters
LabReportRelation.objects.filter(
    labId_id=lab_id,
    department_id__in=user_departments
).select_related(
    "userDetailsId",
    "billId"
)