from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
from sqlalchemy.orm import DeclarativeBase
from app.core.config import get_settings

settings = get_settings()
engine = create_async_engine(
    settings.database_url, pool_pre_ping=True, pool_recycle=1800,
    echo=settings.app_env == "development"
)
SessionLocal = async_sessionmaker(engine, expire_on_commit=False, class_=AsyncSession)

class Base(DeclarativeBase):
    pass

async def get_db():
    async with SessionLocal() as session:
        yield session