# Copyright 2016 IBM
# 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 argparse
from cliff import show
from oslo_serialization import jsonutils

from neutronclient._i18n import _
from neutronclient.neutron import v2_0


class ShowAutoAllocatedTopology(v2_0.NeutronCommand, show.ShowOne):
    """Show the auto-allocated topology of a given tenant."""

    resource = 'auto_allocated_topology'

    def get_parser(self, prog_name):
        parser = super(ShowAutoAllocatedTopology, self).get_parser(prog_name)
        parser.add_argument(
            '--tenant-id', metavar='tenant-id',
            help=_('The owner tenant ID.'))
        # Allow people to do
        #    neutron auto-allocated-topology-show <tenant-id>
        # (Only useful to users who can look at other tenants' topologies.)
        # We use a different name for this arg because the default will
        # override whatever is in the named arg otherwise.
        parser.add_argument(
            'pos_tenant_id',
            help=argparse.SUPPRESS, nargs='?')
        return parser

    def take_action(self, parsed_args):
        client = self.get_client()
        tenant_id = parsed_args.tenant_id or parsed_args.pos_tenant_id
        data = client.show_auto_allocated_topology(tenant_id)
        if self.resource in data:
            for k, v in data[self.resource].items():
                if isinstance(v, list):
                    value = ""
                    for _item in v:
                        if value:
                            value += "\n"
                        if isinstance(_item, dict):
                            value += jsonutils.dumps(_item)
                        else:
                            value += str(_item)
                    data[self.resource][k] = value
                elif v is None:
                    data[self.resource][k] = ''
            return zip(*sorted(data[self.resource].items()))
        else:
            return None