import base64

from .oauth import BaseOAuth2


class PushbulletOAuth2(BaseOAuth2):
    """pushbullet OAuth authentication backend"""

    name = "pushbullet"
    EXTRA_DATA = [("id", "id")]
    ID_KEY = "username"
    AUTHORIZATION_URL = "https://www.pushbullet.com/authorize"
    REQUEST_TOKEN_URL = "https://api.pushbullet.com/oauth2/token"
    ACCESS_TOKEN_URL = "https://api.pushbullet.com/oauth2/token"
    STATE_PARAMETER = False

    def get_user_details(self, response):
        return {"username": response.get("access_token")}

    def get_user_id(self, details, response):
        auth = "Basic {}".format(base64.b64encode(details["username"]))
        return self.get_json(
            "https://api.pushbullet.com/v2/users/me", headers={"Authorization": auth}
        )["iden"]