"""
Patreon OAuth2 backend
https://www.patreon.com/platform/documentation/oauth
"""

from .oauth import BaseOAuth2


class PatreonOAuth2(BaseOAuth2):
    """Patreon OAuth2 authentication backend"""

    name = "patreon"
    AUTHORIZATION_URL = "https://www.patreon.com/oauth2/authorize"
    ACCESS_TOKEN_URL = "https://www.patreon.com/api/oauth2/token"
    REVOKE_TOKEN_URL = "https://www.patreon.com/oauth2/revoke"
    ACCESS_TOKEN_METHOD = "POST"
    REDIRECT_STATE = False
    ID_KEY = "id"
    EXTRA_DATA = [
        ("id", "id"),
    ]

    def get_user_details(self, response):
        details = response["attributes"]
        return {
            "username": details.get("full_name"),
            "email": details.get("email"),
            "fullname": details.get("full_name"),
            "first_name": details.get("first_name"),
            "last_name": details.get("last_name"),
        }

    def user_data(self, access_token, *args, **kwargs):
        return self.get_api(access_token, "identity")["data"]

    def get_api(self, access_token, suffix):
        return self.get_json(
            f"https://www.patreon.com/api/oauth2/v2/{suffix}",
            headers=self.get_auth_header(access_token),
        )

    def get_auth_header(self, access_token):
        return {"Authorization": f"Bearer {access_token}"}