from typing import Optional
from .models import Activity, User

async def log_activity(
    user: Optional[User],
    action: str,
    target_type: str,
    target_id: int,
    ip_address: Optional[str] = None
):
    await Activity.create(
        user=user,
        action=action,
        target_type=target_type,
        target_id=target_id,
        ip_address=ip_address
    )