from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine, AsyncSession
from collections.abc import AsyncGenerator

from backend.config import settings

engine = create_async_engine(
    settings.database_url,
    pool_size=5,
    max_overflow=10,
    pool_recycle=3600,
)

async_session = async_sessionmaker(engine, expire_on_commit=False)


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