import os
from typing import Generator

from dotenv import load_dotenv
from sqlalchemy import create_engine
from sqlalchemy.orm import declarative_base, sessionmaker

load_dotenv()

DATABASE_URL = os.getenv("DATABASE_URL", "sqlite:///./data/oer_poc.db")

engine = create_engine(
    DATABASE_URL,
    connect_args={"check_same_thread": False} if DATABASE_URL.startswith("sqlite") else {},
)

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

Base = declarative_base()


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