from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine
from sqlalchemy.orm import sessionmaker, declarative_base
from contextlib import asynccontextmanager
from dotenv import load_dotenv
import os
from collections.abc import AsyncGenerator
load_dotenv()

DATABASE_URL = os.getenv("DATABASE_URL")

engine = create_async_engine(DATABASE_URL)
AsyncSessionLocal = sessionmaker(bind=engine, class_=AsyncSession, expire_on_commit=False)
Base = declarative_base()

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