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# Copyright 2012 GRNET S.A. All rights reserved.

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# without modification, are permitted provided that the following

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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

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from kamaki.clients import Client, ClientError

class AstakosClient(Client):

    """GRNet Astakos API client"""

    _cache = {}

    def __init__(self, base_url, token):

        super(AstakosClient, self).__init__(base_url, token)

    def authenticate(self, token=None):

        """

        :param token: (str) custom token to authenticate

        :returns: (dict) authentication information

        """

        self.token = token or self.token

        self._cache[token] = self.get('/im/authenticate').json

        return self._cache[token]

    def list(self):

        """list cached user information"""

        return self._cache.values()

    def _user_info(self, token=None):

        token = token or self.token

        try:

            return self._cache[token]

        except KeyError:

            return self.authenticate(token)

    def term(self, key, token=None):

        """Get (cached) term, from user credentials"""

        return self._user_info(token)[key]