"""
Credential lookup, in priority order:
  1. Environment variables (set as "Secrets" in a Hugging Face Space) --
     FB_PAGE_ID and FB_ACCESS_TOKEN.
  2. Values saved in the local database via the Settings tab.

Using Space secrets means the token is never stored in the app's
SQLite file and never shown/editable in the UI -- it only lives in
the Space's encrypted secret store and the process environment.
"""
import os
import database as db

ENV_PAGE_ID = "FB_PAGE_ID"
ENV_ACCESS_TOKEN = "FB_ACCESS_TOKEN"


def using_env_secrets() -> bool:
    return bool(os.environ.get(ENV_PAGE_ID) and os.environ.get(ENV_ACCESS_TOKEN))


def get_page_id():
    return os.environ.get(ENV_PAGE_ID) or db.get_setting("page_id")


def get_access_token():
    return os.environ.get(ENV_ACCESS_TOKEN) or db.get_setting("access_token")


def is_configured() -> bool:
    return bool(get_page_id() and get_access_token())