# Copyright 2013 Rackspace Hosting
# 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.

from novaclient.i18n import _
from novaclient import utils
from novaclient.v2 import shell


@utils.arg(
    'host',
    metavar='<host>',
    help=_('Name of host.'))
@utils.arg(
    'action',
    metavar='<action>',
    choices=['set', 'delete'],
    help=_("Actions: 'set' or 'delete'"))
@utils.arg(
    'metadata',
    metavar='<key=value>',
    nargs='+',
    action='append',
    default=[],
    help=_('Metadata to set or delete (only key is necessary on delete)'))
def do_host_meta(cs, args):
    """Set or Delete metadata on all instances of a host."""
    hypervisors = cs.hypervisors.search(args.host, servers=True)
    for hyper in hypervisors:
        metadata = shell._extract_metadata(args)
        if hasattr(hyper, 'servers'):
            for server in hyper.servers:
                if args.action == 'set':
                    cs.servers.set_meta(server['uuid'], metadata)
                elif args.action == 'delete':
                    cs.servers.delete_meta(server['uuid'], metadata.keys())