from collections.abc import AsyncGenerator

from sqlalchemy.ext.asyncio import (
    AsyncEngine,
    AsyncSession,
    async_sessionmaker,
    create_async_engine,
)
from sqlalchemy.orm import DeclarativeBase

from ...config import settings

engine: AsyncEngine = create_async_engine(
    settings.database_url,
    pool_pre_ping=True,
)
AsyncSessionLocal = async_sessionmaker[AsyncSession](
    engine,
    expire_on_commit=False,
)


class Base(DeclarativeBase):
    pass


async def get_db() -> AsyncGenerator[AsyncSession, None]:
    async with AsyncSessionLocal() as session:
        yield session