"""
Disqus OAuth2 backend, docs at:
    http://psa.matiasaguirre.net/docs/backends/disqus.html
"""
from social.backends.oauth import BaseOAuth2


class DisqusOAuth2(BaseOAuth2):
    name = 'disqus'
    AUTHORIZATION_URL = 'https://disqus.com/api/oauth/2.0/authorize/'
    ACCESS_TOKEN_URL = 'https://disqus.com/api/oauth/2.0/access_token/'
    ACCESS_TOKEN_METHOD = 'POST'
    SCOPE_SEPARATOR = ','
    EXTRA_DATA = [
        ('avatar', 'avatar'),
        ('connections', 'connections'),
        ('user_id', 'user_id'),
        ('email', 'email'),
        ('email_hash', 'emailHash'),
        ('expires', 'expires'),
        ('location', 'location'),
        ('meta', 'response'),
        ('name', 'name'),
        ('username', 'username'),
    ]

    def get_user_id(self, details, response):
        return response['response']['id']

    def get_user_details(self, response):
        """Return user details from Disqus account"""
        rr = response.get('response', {})
        return {
            'username': rr.get('username', ''),
            'user_id': response.get('user_id', ''),
            'email': rr.get('email', ''),
            'name': rr.get('name', ''),
        }

    def extra_data(self, user, uid, response, details=None, *args, **kwargs):
        meta_response = dict(response, **response.get('response', {}))
        return super(DisqusOAuth2, self).extra_data(user, uid, meta_response,
                                                    details, *args, **kwargs)

    def user_data(self, access_token, *args, **kwargs):
        """Loads user data from service"""
        key, secret = self.get_key_and_secret()
        return self.get_json(
            'https://disqus.com/api/3.0/users/details.json',
            params={'access_token': access_token, 'api_secret': secret}
        )
