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

DB_PATH = os.environ.get("DB_PATH", "/app/data/agents.db")
engine = create_engine(f"sqlite:///{DB_PATH}", connect_args={"check_same_thread": False})
SessionLocal = sessionmaker(bind=engine)


class Base(DeclarativeBase):
    pass


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


def init_db():
    Base.metadata.create_all(bind=engine)