from typing import AsyncGenerator

from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession
from sqlalchemy.orm import sessionmaker

from .config import WMS_PG_DATABASE, WMS_PG_HOST, WMS_PG_PASSWORD, WMS_PG_LOGIN

DATABASE_URL = f'postgresql+asyncpg://{WMS_PG_LOGIN}:{WMS_PG_PASSWORD}@{WMS_PG_HOST}/{WMS_PG_DATABASE}'
engine = create_async_engine(DATABASE_URL)
wms_session_maker = sessionmaker(
    engine,
    class_=AsyncSession,
    expire_on_commit=False,
    autocommit=False,
    autoflush=False,
)


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