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

DATABASE_URL = "postgresql+asyncpg://weather_user:weather_pass@db:5432/weather"

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

Base = declarative_base()

async def get_session():
    async with AsyncSessionLocal() as session:
        yield session