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


class Base(DeclarativeBase):
    pass


def get_engine(db_url: str):
    connect_args = {"check_same_thread": False} if db_url.startswith("sqlite") else {}
    return create_engine(db_url, connect_args=connect_args)


def make_session_factory(engine):
    return sessionmaker(bind=engine, autoflush=False, autocommit=False)


def init_db(engine):
    Base.metadata.create_all(bind=engine)