import os
from pathlib import Path

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

DATA_DIR = Path(os.environ.get("DATA_DIR", "/data"))
DATA_DIR.mkdir(parents=True, exist_ok=True)
UPLOAD_DIR = DATA_DIR / "uploads"
UPLOAD_DIR.mkdir(parents=True, exist_ok=True)

DATABASE_URL = f"sqlite:///{DATA_DIR / 'recipes.db'}"

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


class Base(DeclarativeBase):
    pass


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