"""
Twilio auth backend, docs at:
    https://python-social-auth.readthedocs.io/en/latest/backends/twilio.html
"""

from re import sub
from urllib.parse import urlencode

from .base import BaseAuth


class TwilioAuth(BaseAuth):
    name = "twilio"
    ID_KEY = "AccountSid"

    def get_user_details(self, response):
        """Return twilio details, Twilio only provides AccountSID as
        parameters."""
        # /complete/twilio/?AccountSid=ACc65ea16c9ebd4d4684edf814995b27e
        return {
            "username": response["AccountSid"],
            "email": "",
            "fullname": "",
            "first_name": "",
            "last_name": "",
        }

    def auth_url(self):
        """Return authorization redirect url."""
        key, secret = self.get_key_and_secret()
        callback = self.strategy.absolute_uri(self.redirect_uri)
        callback = sub(r"^https", "http", callback)
        query = urlencode({"cb": callback})
        return f"https://www.twilio.com/authorize/{key}?{query}"

    def auth_complete(self, *args, **kwargs):
        """Completes login process, must return user instance"""
        account_sid = self.data.get("AccountSid")
        if not account_sid:
            raise ValueError("No AccountSid returned")
        kwargs.update({"response": self.data, "backend": self})
        return self.strategy.authenticate(*args, **kwargs)
