"""
Soundcloud OAuth2 backend, docs at:
    https://python-social-auth.readthedocs.io/en/latest/backends/soundcloud.html
"""

from ..utils import url_add_parameters
from .oauth import BaseOAuth2


class SoundcloudOAuth2(BaseOAuth2):
    """Soundcloud OAuth authentication backend"""

    name = "soundcloud"
    AUTHORIZATION_URL = "https://soundcloud.com/connect"
    ACCESS_TOKEN_URL = "https://api.soundcloud.com/oauth2/token"
    SCOPE_SEPARATOR = ","
    REDIRECT_STATE = False
    EXTRA_DATA = [
        ("id", "id"),
        ("refresh_token", "refresh_token"),
        ("expires", "expires"),
    ]

    def get_user_details(self, response):
        """Return user details from Soundcloud account"""
        fullname, first_name, last_name = self.get_user_names(response.get("full_name"))
        return {
            "username": response.get("username"),
            "email": response.get("email") or "",
            "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://api.soundcloud.com/me.json", params={"oauth_token": access_token}
        )

    def auth_url(self):
        """Return redirect url"""
        state = None
        if self.STATE_PARAMETER or self.REDIRECT_STATE:
            # Store state in session for further request validation. The state
            # value is passed as state parameter (as specified in OAuth2 spec),
            # but also added to redirect_uri, that way we can still verify the
            # request if the provider doesn't implement the state parameter.
            # Reuse token if any.
            name = self.name + "_state"
            state = self.strategy.session_get(name) or self.state_token()
            self.strategy.session_set(name, state)

        params = self.auth_params(state)
        params.update(self.get_scope_argument())
        params.update(self.auth_extra_arguments())
        return url_add_parameters(self.AUTHORIZATION_URL, params, True)
