from django.apps import AppConfig
from django.conf import settings


class DiscourseConfig(AppConfig):

    name = 'pingcap_sso.discourse'

    def ready(self):
        self._check_required_conf()

    def _check_required_conf(self):
        required_confs = [
            'DISCOURSE_SSO_TOKEN',
            'DISCOURSE_SSO_CALLBACK_URI',
            'DISCOURSE_SSO_SYNC_ENDPOINT',
            'DISCOURSE_API_KEY'
        ]
        for conf in required_confs:
            if not getattr(settings, conf):
                raise Exception('Discourse required {} in settings.py'.format(conf))