"""
Douban OAuth1 and OAuth2 backends, docs at:
    http://psa.matiasaguirre.net/docs/backends/douban.html
"""
from social.backends.oauth import BaseOAuth2, BaseOAuth1


class DoubanOAuth(BaseOAuth1):
    """Douban OAuth authentication backend"""
    name = 'douban'
    EXTRA_DATA = [('id', 'id')]
    AUTHORIZATION_URL = 'http://www.douban.com/service/auth/authorize'
    REQUEST_TOKEN_URL = 'http://www.douban.com/service/auth/request_token'
    ACCESS_TOKEN_URL = 'http://www.douban.com/service/auth/access_token'

    def get_user_id(self, details, response):
        return response['db:uid']['$t']

    def get_user_details(self, response):
        """Return user details from Douban"""
        return {'username': response["db:uid"]["$t"],
                'email': ''}

    def user_data(self, access_token, *args, **kwargs):
        """Return user data provided"""
        return self.get_json('http://api.douban.com/people/%40me?&alt=json',
                             auth=self.oauth_auth(access_token))


class DoubanOAuth2(BaseOAuth2):
    """Douban OAuth authentication backend"""
    name = 'douban-oauth2'
    AUTHORIZATION_URL = 'https://www.douban.com/service/auth2/auth'
    ACCESS_TOKEN_URL = 'https://www.douban.com/service/auth2/token'
    ACCESS_TOKEN_METHOD = 'POST'
    REDIRECT_STATE = False
    EXTRA_DATA = [
        ('id', 'id'),
        ('uid', 'username'),
        ('refresh_token', 'refresh_token'),
    ]

    def get_user_details(self, response):
        """Return user details from Douban"""
        fullname, first_name, last_name = self.get_user_names(
            response.get('name', '')
        )
        return {'username': response.get('uid', ''),
                'fullname': fullname,
                'first_name': first_name,
                'last_name': last_name,
                'email': ''}

    def user_data(self, access_token, *args, **kwargs):
        """Return user data provided"""
        return self.get_json(
            'https://api.douban.com/v2/user/~me',
            headers={'Authorization': 'Bearer {0}'.format(access_token)}
        )
