from typing 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, echo=False, pool_pre_ping=True)
SessionLocal = async_sessionmaker(engine, expire_on_commit=False, autoflush=False)


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