"""
Centralized runtime settings for the Doof backend.

No external dependencies; reads from environment only so it can be imported
anywhere (including tests) without side effects.
"""
from __future__ import annotations

from dataclasses import dataclass
import os


@dataclass(frozen=True)
class Settings:
    # Database
    database_path: str = os.environ.get("DOOF_DB", "./data/doof.sqlite")

    # Environment flags
    prod: bool = os.environ.get("DOOF_PROD", "false").lower() in {"1", "true", "yes"}

    # Frontend dev server for reverse proxy in non-prod
    frontend_dev_url: str = os.environ.get("FRONTEND_DEV_URL", "http://localhost:8080/")


# A module-level singleton for convenience imports
settings = Settings()