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

from app.config import settings

_connect_args = {"check_same_thread": False} if settings.DATABASE_URL.startswith("sqlite") else {}
engine = create_async_engine(settings.DATABASE_URL, echo=False, connect_args=_connect_args)
AsyncSessionLocal = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)


class Base(DeclarativeBase):
    pass


async def get_db() -> AsyncSession:
    async with AsyncSessionLocal() as session:
        yield session