from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
from app.config import get_settings

settings = get_settings()

engine_kwargs = {"echo": False}
if "postgresql" in settings.DATABASE_URL:
    engine_kwargs["pool_size"] = 10
    engine_kwargs["max_overflow"] = 20
engine = create_async_engine(settings.DATABASE_URL, **engine_kwargs)

async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)


async def get_db():
    async with async_session() as session:
        try:
            yield session
            await session.commit()
        except Exception:
            await session.rollback()
            raise