from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from db.models import User


class UserRepository:
    def __init__(self, session: AsyncSession) -> None:
        self.session = session

    async def get_user_by_id(self, id: int) -> User | None:
        stmt = select(User).where(User.id == id)
        res = await self.session.execute(stmt)
        return res.scalar_one_or_none()

    async def get_user_by_telegram_id(self, telegram_id: int) -> User | None:
        stmt = select(User).where(User.telegram_id == telegram_id)
        res = await self.session.execute(stmt)
        return res.scalar_one_or_none()

    async def get_user_by_username(self, username: str) -> User | None:
        stmt = select(User).where(User.username == username)
        res = await self.session.execute(stmt)
        return res.scalar_one_or_none()

    async def create(
        self,
        *,
        username: str | None = None,
        hashed_password: str | None = None,
        telegram_id: int | None = None,
    ) -> User:
        obj = User(
            username=username,
            hashed_password=hashed_password,
            telegram_id=telegram_id,
        )
        self.session.add(obj)
        await self.session.commit()

        return obj