from typing import List

from structlog import getLogger

from delphi_api.const import AUTH0_API_AUDIENCE, AUTH0_DOMAIN, DEFAULT_OAUTH2_FLOW
from delphi_api.core import BaseStruct

LOG = getLogger(__name__)


class AuthCredentials(BaseStruct):
    """Auth credentials helper class."""
    audience: str = AUTH0_API_AUDIENCE
    client_id: str = None
    client_secret: str = None
    grant_type: str = DEFAULT_OAUTH2_FLOW
    scope: str = None

    @property
    def access_token_url(self) -> str:
        return f'https://{AUTH0_DOMAIN}/oauth/token'

    @property
    def api_base_url(self) -> str:
        return f'https://{AUTH0_DOMAIN}'

    @property
    def authorize_url(self) -> str:
        return f'https://{AUTH0_DOMAIN}/authorize'

    @property
    def client_kwargs(self) -> dict:
        data = {
            'token_placement': 'header',
        }
        if self.scope:
            data.update({'scope': f'{self.scope}'})
        return data

    @property
    def token_endpoint_auth_method(self) -> str:
        """
        Defines the requested authentication method for the token endpoint. Possible values
        are 'none' (public application without a client secret), 'post' (application uses HTTP
        POST parameters) or 'basic' (application uses HTTP Basic).
        """
        return 'client_secret_post'

    def _ignore_fields(self) -> List[str]:
        """
        Properties to ignore when calling ``.to_dict()`` that will give us a nice
        dictionary to pass as kwargs for the auth flask wrapper
        """
        return []