# 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.

from keystoneauth1 import identity
from keystoneauth1 import loading


class Token(loading.BaseGenericLoader):
    """Given an existing token rescope it to another target.

    This plugin uses the Identity service's rescope mechanism to get a new
    token based upon an existing token. Because an auth plugin requires a
    service catalog and scope information it is often easier to fetch a new
    token based on an existing one than validate and reuse the one you already
    have.

    As a generic plugin this plugin is identity version independent and will
    discover available versions before use. This means it expects to be
    providen an unversioned URL to operate against.
    """

    @property
    def plugin_class(self):
        return identity.Token

    def get_options(self):
        options = super(Token, self).get_options()

        options.extend([
            loading.Opt('token', secret=True,
                        help='Token to authenticate with'),
        ])

        return options


class Password(loading.BaseGenericLoader):
    """Authenticate via a username and password.

    Authenticate to the identity service using an inbuilt username and
    password. This is the standard and most common form of authentication.

    As a generic plugin this plugin is identity version independent and will
    discover available versions before use. This means it expects to be
    providen an unversioned URL to operate against.
    """

    @property
    def plugin_class(self):
        return identity.Password

    def get_options(cls):
        options = super(Password, cls).get_options()
        options.extend([
            loading.Opt('user-id', help='User id'),
            loading.Opt('username',
                        help='Username',
                        deprecated=[loading.Opt('user-name')]),
            loading.Opt('user-domain-id', help="User's domain id"),
            loading.Opt('user-domain-name', help="User's domain name"),
            loading.Opt('password',
                        secret=True,
                        prompt='Password: ',
                        help="User's password"),
        ])
        return options