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

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

DATABASE_URL = f"sqlite:///{DATA_DIR}/calendarr.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()