# Copyright 2012 Hewlett-Packard Development Company, L.P. All Rights Reserved.
#
# Author: Kiall Mac Innes <kiall@hp.com>
#
# 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 designate.mdns import rpcapi as mdns_rpcapi

from oslo.config import cfg

cfg.CONF.register_group(cfg.OptGroup(
    name='service:central', title="Configuration for Central Service"
))

cfg.CONF.register_opts([
    cfg.IntOpt('workers', default=None,
               help='Number of worker processes to spawn'),
    cfg.StrOpt('backend-driver', default='fake',
               help='The backend driver to use'),
    cfg.StrOpt('storage-driver', default='sqlalchemy',
               help='The storage driver to use'),
    cfg.ListOpt('enabled-notification-handlers', default=[],
                help='Enabled Notification Handlers'),
    cfg.IntOpt('max_domain_name_len', default=255,
               help="Maximum domain name length"),
    cfg.IntOpt('max_recordset_name_len', default=255,
               help="Maximum recordset name length",
               deprecated_name='max_record_name_len'),
    cfg.StrOpt('managed_resource_email', default='email@example.io',
               help='E-Mail for Managed resources'),
    cfg.StrOpt('managed_resource_tenant_id',
               help="The Tenant ID that will own any managed resources."),
    cfg.StrOpt('min_ttl', default="None", help="Minimum TTL allowed")
], group='service:central')

MDNS_API = None


def get_mdns_api():
    """
    The rpc.get_client() which is called upon the API object initialization
    will cause a assertion error if the designate.rpc.TRANSPORT isn't setup by
    rpc.init() before.

    This fixes that by creating the rpcapi when demanded.
    """
    global MDNS_API
    if not MDNS_API:
        MDNS_API = mdns_rpcapi.MdnsAPI()
    return MDNS_API