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

settings = get_settings()

engine = create_async_engine(
    settings.DATABASE_URL,
    echo=settings.APP_ENV == "development",
    pool_pre_ping=True,
    pool_size=10,
    max_overflow=20,
)

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


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