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

# 使用绝对路径
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
DATABASE_URL = f"sqlite:///{os.path.join(BASE_DIR, 'data', 'app.db')}"

engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)


class Base(DeclarativeBase):
    pass


def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()