from allauth.socialaccount.app_settings import QUERY_EMAIL
from allauth.socialaccount.providers.base import AuthAction, ProviderAccount
from allauth.socialaccount.providers.oauth2.provider import OAuth2Provider


class Scope(object):
    EMAIL = 'GET@loc.user.email'
    UID = 'GET@loc.user.uid'
    NAME = 'GET@loc.user.name'


class TUMAccount(ProviderAccount):
    def to_str(self):
        dflt = super(TUMAccount, self).to_str()
        return self.account.extra_data.get('name', dflt)


class TUMProvider(OAuth2Provider):
    id = 'tum'
    name = 'TUM'
    account_class = TUMAccount

    def get_default_scope(self):
        scope = [Scope.UID, Scope.NAME]
        if QUERY_EMAIL:
            scope.append(Scope.EMAIL)
        return scope

    def extract_uid(self, data):
        return str(data['sub'])

    def extract_common_fields(self, data):
        return dict(email=data.get('email'),
                    last_name=data.get('family_name'),
                    first_name=data.get('given_name'))

provider_classes = [TUMProvider]
