from collections.abc import AsyncGenerator

from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine

from app.core.config import settings

engine = create_async_engine(
    settings.database_url, pool_pre_ping=True, pool_size=10, max_overflow=20
)
SessionLocal = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)


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