from collections.abc import AsyncIterator

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


class Base(DeclarativeBase):
    pass


def make_session_factory(database_url: str) -> async_sessionmaker[AsyncSession]:
    return async_sessionmaker(
        create_async_engine(database_url, pool_pre_ping=True), expire_on_commit=False
    )


async def session_dependency(
    factory: async_sessionmaker[AsyncSession],
) -> AsyncIterator[AsyncSession]:
    async with factory() as session:
        yield session