from collections.abc import AsyncGenerator
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
from sqlalchemy.orm import DeclarativeBase
from app.core.config import get_settings

settings = get_settings()

engine = create_async_engine(settings.database_url, future=True, pool_pre_ping=True)
SessionLocal = async_sessionmaker(bind=engine, expire_on_commit=False, class_=AsyncSession)


class Base(DeclarativeBase):
    pass


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