"""User repository for database queries."""

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

from models import User


class UserRepository:
    """Repository for user-related database queries."""

    def __init__(self, db: AsyncSession):
        self.db = db

    async def get_by_email(self, email: str) -> User | None:
        """Get a user by email."""
        result = await self.db.execute(select(User).where(User.email == email))
        return result.scalar_one_or_none()

    async def get_by_id(self, user_id: int) -> User | None:
        """Get a user by ID."""
        result = await self.db.execute(select(User).where(User.id == user_id))
        return result.scalar_one_or_none()

    async def get_godfather_email(self, godfather_id: int | None) -> str | None:
        """Get the email of a godfather user by ID."""
        if not godfather_id:
            return None
        result = await self.db.execute(
            select(User.email).where(User.id == godfather_id)
        )
        return result.scalar_one_or_none()

    async def create(self, user: User) -> User:
        """
        Create a new user record.

        Args:
            user: User instance to persist

        Returns:
            Created User record (flushed to get ID)
        """
        self.db.add(user)
        await self.db.flush()
        return user

    async def update(self, user: User) -> User:
        """
        Update an existing user record.

        Args:
            user: User instance to update

        Returns:
            Updated User record (refreshed from database)
        """
        await self.db.commit()
        await self.db.refresh(user)
        return user

    async def refresh(self, user: User) -> None:
        """Refresh a user instance from the database."""
        await self.db.refresh(user)