from sqlalchemy.ext.asyncio import AsyncSession

from db.models import User
from repositories.users import UserRepository
from schemas.jwt import ServiceJWTPayload


async def fetch_subject_from_service(
    payload: ServiceJWTPayload, session: AsyncSession
) -> User | None:
    repo = UserRepository(session)

    if payload.acting_as.startswith("telegram:"):
        telegram_id = int(payload.acting_as.split("telegram:")[1])
        return await repo.get_user_by_telegram_id(telegram_id)

    return