from sqlalchemy.ext.asyncio import AsyncSession

from app.db.session import get_db

# User ID header — placeholder for SSO integration.
# When SSO is added, this will extract user_id from the JWT/session token.
USER_ID_HEADER = "X-User-Id"
DEFAULT_USER_ID = "default"


def get_user_id(x_user_id: str | None = None) -> str:
    return x_user_id or DEFAULT_USER_ID