import logging

from oauth2_provider.contrib.rest_framework import TokenMatchesOASRequirements, OAuth2Authentication
from rest_framework.permissions import (
    IsAuthenticated
)

logger = logging.getLogger("oauth2_provider")


class IsAuthenticatedOrTokenMatchesOASRequirements(TokenMatchesOASRequirements):
    def has_permission(self, request, view):
        logger.debug(f'try to authenticate {request} for {view} in IsAuthenticatedOrTokenMatchesOASRequirements')
        is_authenticated = IsAuthenticated().has_permission(request, view)
        logger.debug(f'is_authenticated: {is_authenticated}')
        oauth2authenticated = False
        if is_authenticated:
            oauth2authenticated = isinstance(request.successful_authenticator, OAuth2Authentication)

        logger.debug(f'oauth2authenticated: {oauth2authenticated}')

        token_has_scope = TokenMatchesOASRequirements()
        logger.debug(f'token_has_scope: {token_has_scope}')

        result = (is_authenticated and not oauth2authenticated) or token_has_scope.has_permission(request, view)
        logger.debug(f'authentication result: {result}')
        return result