"""Database session and engine setup."""

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

from app.config import DATABASE_URL

engine = create_async_engine(DATABASE_URL, echo=False, pool_size=10, max_overflow=5)
async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)


class Base(DeclarativeBase):
    pass


async def get_db() -> AsyncSession:
    async with async_session() as session:
        yield session
