from oauth2_provider.settings import OAuth2ProviderSettings, USER_SETTINGS, DEFAULTS, IMPORT_STRINGS, MANDATORY, \
    _PhonyHttpRequest

from django.http import HttpRequest
from django.urls import reverse
from oauthlib.common import Request


class GooyalOAuth2Settings(OAuth2ProviderSettings):
    def oidc_issuer(self, request):
        """
        Helper function to get the OIDC issuer URL, either from the settings
        or constructing it from the passed request.

        If only an oauthlib request is available, a dummy django request is
        built from that and used to generate the URL.
        """
        if self.OIDC_ISS_ENDPOINT:
            return self.OIDC_ISS_ENDPOINT
        if isinstance(request, HttpRequest):
            django_request = request
        elif isinstance(request, Request):
            django_request = _PhonyHttpRequest()
            django_request.META = request.headers
            if request.headers.get("X_DJANGO_OAUTH_TOOLKIT_SECURE", False):
                django_request._scheme = "https"
        else:
            raise TypeError("request must be a django or oauthlib request: got %r" % request)
        abs_url = django_request.build_absolute_uri(reverse("gooyal_oauth2:oidc-connect-discovery-info"))
        return abs_url[: -len("/.well-known/openid-configuration")]

GOOYAL_DEFAULTS = {
    # Resource Server with Token Introspection additions
    "RESOURCE_SERVER_CLIENT_ID": None,
    "RESOURCE_SERVER_CLIENT_SECRET": None,

    # set default
    "INTROSPECTION_USER_CREATE_METHOD": None,
    }

GOOYAL_IMPORT_STRINGS = ("INTROSPECTION_USER_CREATE_METHOD",)

GOOYAL_MANDATORY = ("INTROSPECTION_USER_CREATE_METHOD",)

DEFAULTS.update(GOOYAL_DEFAULTS)
IMPORT_STRINGS = IMPORT_STRINGS + GOOYAL_IMPORT_STRINGS
MANDATORY = MANDATORY + GOOYAL_MANDATORY

oauth2_settings = GooyalOAuth2Settings(USER_SETTINGS, DEFAULTS, IMPORT_STRINGS, MANDATORY)