"""
Beats backend, docs at:
    https://developer.beatsmusic.com/docs
"""

import base64

from social_core.exceptions import AuthUnknownError

from ..utils import handle_http_errors
from .oauth import BaseOAuth2


class BeatsOAuth2(BaseOAuth2):
    name = "beats"
    SCOPE_SEPARATOR = " "
    ID_KEY = "user_context"
    AUTHORIZATION_URL = "https://partner.api.beatsmusic.com/v1/oauth2/authorize"
    ACCESS_TOKEN_URL = "https://partner.api.beatsmusic.com/oauth2/token"
    REDIRECT_STATE = False

    def get_user_id(self, details, response):
        return response["result"][BeatsOAuth2.ID_KEY]

    def auth_headers(self):
        return {
            "Authorization": "Basic {}".format(
                base64.urlsafe_b64encode(
                    "{}:{}".format(*self.get_key_and_secret()).encode()
                )
            )
        }

    @handle_http_errors
    def auth_complete(self, *args, **kwargs):
        """Completes login process, must return user instance"""
        self.process_error(self.data)
        response = self.request_access_token(
            self.ACCESS_TOKEN_URL,
            data=self.auth_complete_params(self.validate_state()),
            headers=self.auth_headers(),
            method=self.ACCESS_TOKEN_METHOD,
        )
        self.process_error(response)
        # mashery wraps in jsonrpc
        if response.get("jsonrpc", None):
            response = response.get("result", None)
            if response is None:
                raise AuthUnknownError(self, "Invalid authentication response")
        return self.do_auth(
            response["access_token"], response=response, *args, **kwargs
        )

    def get_user_details(self, response):
        """Return user details from Beats account"""
        response = response["result"]
        fullname, first_name, last_name = self.get_user_names(
            response.get("display_name")
        )
        return {
            "username": response.get("id"),
            "email": response.get("email"),
            "fullname": fullname,
            "first_name": first_name,
            "last_name": last_name,
        }

    def user_data(self, access_token, *args, **kwargs):
        """Loads user data from service"""
        return self.get_json(
            "https://partner.api.beatsmusic.com/v1/api/me",
            headers={"Authorization": f"Bearer {access_token}"},
        )