from sqlalchemy import create_engine
from sqlalchemy.orm import DeclarativeBase, sessionmaker

from app.core.config import settings


class Base(DeclarativeBase):
    pass


engine = create_engine(
    settings.database_url, pool_pre_ping=True, connect_args={"connect_timeout": 5}
)
SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False)


def get_db():
    db = SessionLocal()
    try:
        yield db
    except Exception:
        db.rollback()
        raise
    finally:
        db.close()