from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, scoped_session
from config.settings import settings

SQLALCHEMY_SYNC_URL = (
    f"postgresql+psycopg://{settings.DB_USER}:{settings.DB_PASS}"
    f"@{settings.DB_HOST}:{settings.DB_PORT}/{settings.DB_NAME}"
)

engine = create_engine(
    SQLALCHEMY_SYNC_URL,
    echo=False,       # 开发可改 True
    future=True
)

SessionLocal = scoped_session(
    sessionmaker(bind=engine, autoflush=False, autocommit=False)
)