"""API for Volvo bound to Home Assistant OAuth."""

from typing import cast

from aiohttp import ClientSession
from volvocarsapi.auth import AccessTokenManager

from homeassistant.helpers.config_entry_oauth2_flow import OAuth2Session


class VolvoAuth(AccessTokenManager):
    """Provide Volvo authentication tied to an OAuth2 based config entry."""

    def __init__(self, websession: ClientSession, oauth_session: OAuth2Session) -> None:
        """Initialize Volvo auth."""
        super().__init__(websession)
        self._oauth_session = oauth_session

    async def async_get_access_token(self) -> str:
        """Return a valid access token."""
        await self._oauth_session.async_ensure_token_valid()
        return cast(str, self._oauth_session.token["access_token"])


class ConfigFlowVolvoAuth(AccessTokenManager):
    """Provide Volvo authentication before a ConfigEntry exists.

    This implementation directly provides the token without supporting refresh.
    """

    def __init__(self, websession: ClientSession, token: str) -> None:
        """Initialize ConfigFlowVolvoAuth."""
        super().__init__(websession)
        self._token = token

    async def async_get_access_token(self) -> str:
        """Return the token for the Volvo API."""
        return self._token