# Copyright 2013, 2016 Red Hat, Inc.
# All Rights Reserved.
#
# 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 json

from base import VersionedService
import config_tempest.constants as C
from tempest.lib import exceptions


class VolumeService(VersionedService):
    def set_extensions(self):
        body = self.do_get(self.service_url + '/extensions')
        body = json.loads(body)
        self.extensions = map(lambda x: x['alias'], body['extensions'])

    def set_versions(self):
        url, top_level = self.no_port_cut_url()
        body = self.do_get(url, top_level=top_level)
        body = json.loads(body)
        self.versions = self.deserialize_versions(body)


def check_volume_backup_service(conf, volume_client, is_volumev3):
    """Verify if the cinder backup service is enabled"""
    if not is_volumev3:
        C.LOG.info("No volume service found, "
                   "skipping backup service check")
        return
    try:
        params = {'binary': 'cinder-backup'}
        is_backup = volume_client.list_services(**params)
    except exceptions.Forbidden:
        C.LOG.warning("User has no permissions to list services - "
                      "cinder-backup service can't be discovered.")
        return

    if is_backup:
        # We only set backup to false if the service isn't running
        # otherwise we keep the default value
        service = is_backup['services']
        if not service or service[0]['state'] == 'down':
            conf.set('volume-feature-enabled', 'backup', 'False')