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

DB_PATH = os.getenv("DB_PATH", "/data/clusterforge.db")
DATABASE_URL = f"sqlite:///{DB_PATH}"

engine = create_engine(
    DATABASE_URL,
    connect_args={"check_same_thread": False},
)

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

Base = declarative_base()


def init_db() -> None:
    import backend.app.models.dataset
    import backend.app.models.experiment

    Base.metadata.create_all(bind=engine)


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