# Copyright 2013, Red Hat, Inc.
#
#    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.

"""
Client side of the cert manager RPC API.
"""

import oslo_messaging as messaging

import nova.conf
from nova import rpc

CONF = nova.conf.CONF


class CertAPI(object):
    '''Client side of the cert rpc API.

    API version history:

        1.0 - Initial version.
        1.1 - Added get_backdoor_port()

        ... Grizzly and Havana support message version 1.1.  So, any changes to
        existing methods in 1.x after that point should be done such that they
        can handle the version_cap being set to 1.1.

        2.0 - Major API rev for Icehouse

        ... Icehouse, Juno, Kilo, Liberty, and Mitaka support message version
        2.0.  So, any changes to existing methods in 2.x after that
        point should be done such that they can handle the version_cap
        being set to 2.0.

    '''

    VERSION_ALIASES = {
        'grizzly': '1.1',
        'havana': '1.1',
        'icehouse': '2.0',
        'juno': '2.0',
        'kilo': '2.0',
        'liberty': '2.0',
        'mitaka': '2.0',
    }

    def __init__(self):
        super(CertAPI, self).__init__()
        target = messaging.Target(topic=CONF.cert_topic, version='2.0')
        version_cap = self.VERSION_ALIASES.get(CONF.upgrade_levels.cert,
                                               CONF.upgrade_levels.cert)
        self.client = rpc.get_client(target, version_cap=version_cap)

    def revoke_certs_by_user(self, ctxt, user_id):
        cctxt = self.client.prepare()
        return cctxt.call(ctxt, 'revoke_certs_by_user', user_id=user_id)

    def revoke_certs_by_project(self, ctxt, project_id):
        cctxt = self.client.prepare()
        return cctxt.call(ctxt, 'revoke_certs_by_project',
                          project_id=project_id)

    def revoke_certs_by_user_and_project(self, ctxt, user_id, project_id):
        cctxt = self.client.prepare()
        return cctxt.call(ctxt, 'revoke_certs_by_user_and_project',
                          user_id=user_id, project_id=project_id)

    def generate_x509_cert(self, ctxt, user_id, project_id):
        cctxt = self.client.prepare()
        return cctxt.call(ctxt, 'generate_x509_cert',
                          user_id=user_id,
                          project_id=project_id)

    def fetch_ca(self, ctxt, project_id):
        cctxt = self.client.prepare()
        return cctxt.call(ctxt, 'fetch_ca', project_id=project_id)

    def fetch_crl(self, ctxt, project_id):
        cctxt = self.client.prepare()
        return cctxt.call(ctxt, 'fetch_crl', project_id=project_id)

    def decrypt_text(self, ctxt, project_id, text):
        cctxt = self.client.prepare()
        return cctxt.call(ctxt, 'decrypt_text',
                          project_id=project_id,
                          text=text)