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

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