from django.conf import settings


class PingcapCookieSsoSettings:

    all_settings = [
        'IDP_API_TOKEN',
        'IDP_API_ENDPOINT',
        'SSO_COOKIE_NAME',
        'PU_SSO_SYNC_API_TOKEN',
        'JWT_PUBLIC_KEY'
    ]

    default_settings = {
        'IDP_API_ENDPOINT': 'https://accounts.pingcap.com/api/_/sso/session-info',
        'SSO_COOKIE_NAME': 'ssid'
    }

    def __init__(self):
        self.user_settings = getattr(settings, "PINGCAP_COOKIE_SSO", {})

    def check(self):
        for st in self.all_settings:
            getattr(self, st)

    def __getattr__(self, attr):
        try:
            val = self.user_settings[attr]
        except KeyError:
            try:
                val = self.default_settings[attr]
            except KeyError as exc:
                raise KeyError(
                    "PingCAP COOKIE-SSO missed required settings: %s, "
                    "please defined `PINGCAP_COOKIE_SSO = {'%s': ..}` "
                    "in your settings." % (attr, attr)) from exc

        # Cache result
        setattr(self, attr, val)
        return val


sso_settings = PingcapCookieSsoSettings()