# -*- encoding: utf-8 -*-
#
# Copyright © 2013 IBM Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

import six

from pycadf import cadftype
from pycadf import utils

TYPE_URI_CRED = cadftype.CADF_VERSION_1_0_0 + 'credential'

CRED_KEYNAME_TYPE = "type"
CRED_KEYNAME_TOKEN = "token"

CRED_KEYNAMES = [CRED_KEYNAME_TYPE,
                 CRED_KEYNAME_TOKEN]


class Credential(cadftype.CADFAbstractType):

    type = cadftype.ValidatorDescriptor(
        CRED_KEYNAME_TYPE,
        lambda x: isinstance(x, six.string_types))
    token = cadftype.ValidatorDescriptor(
        CRED_KEYNAME_TOKEN,
        lambda x: isinstance(x, six.string_types))

    def __init__(self, token, type=None):
        """Create Credential data type

        :param token: identity or security token
        :param type: type of credential (ie. identity token)
        """

        # Credential.token
        setattr(self, CRED_KEYNAME_TOKEN, utils.mask_value(token))

        # Credential.type
        if type is not None:
            setattr(self, CRED_KEYNAME_TYPE, type)

    # TODO(mrutkows): validate this cadf:Credential type against schema
    def is_valid(self):
        """Validation to ensure Credential required attributes are set.
        """
        # TODO(mrutkows): validate specific attribute type/format
        return self._isset(CRED_KEYNAME_TOKEN)
