from django.conf import settings

from oidc_provider.lib.claims import AbstractScopeClaims


def default_sub_generator(user):

    return user.id


# Here goes all the package default settings.
default_settings = {
    # Required.
    'LOGIN_URL': None,
    'SITE_URL': None,

    # Optional.
    'OIDC_CODE_EXPIRE': 60*10,
    'OIDC_EXTRA_SCOPE_CLAIMS': AbstractScopeClaims,
    'OIDC_IDTOKEN_EXPIRE': 60*10,
    'OIDC_IDTOKEN_SUB_GENERATOR': default_sub_generator,
    'OIDC_TOKEN_EXPIRE': 60*60,
}


def get(name):
    '''
    Helper function to use inside the package.
    '''
    try:
        value = default_settings[name]
        value = getattr(settings, name)
    except AttributeError:
        if value == None:
            raise Exception('You must set ' + name + ' in your settings.')

    return value