import threading


def log_event(event_type, user, description='', metadata=None, result='success',
              target_user=None, ip_address=None, user_agent=None, request=None):
    def _save():
        try:
            from .models import SystemEventLog

            if request and not ip_address:
                x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')
                if x_forwarded_for:
                    ip_addr = x_forwarded_for.split(',')[0].strip()
                else:
                    ip_addr = request.META.get('REMOTE_ADDR')
            else:
                ip_addr = ip_address

            if request and not user_agent:
                ua = request.META.get('HTTP_USER_AGENT', '')[:500]
            else:
                ua = user_agent or ''

            SystemEventLog.objects.create(
                event_type=event_type,
                user=user,
                target_user=target_user,
                description=description[:500],
                metadata=metadata or {},
                ip_address=ip_addr,
                user_agent=ua,
                result=result,
            )
        except Exception:
            pass

    thread = threading.Thread(target=_save)
    thread.daemon = True
    thread.start()