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

from config import DATABASE_URL


engine = create_async_engine(
    DATABASE_URL,
    echo=False,
    future=True,
    pool_size=20,
    max_overflow=30,
    pool_timeout=15
)

async_session_maker = async_sessionmaker(bind=engine, expire_on_commit=False, class_=AsyncSession)

Base = declarative_base()