# -*- coding: utf-8 -*- #
# Copyright 2015 Google LLC. 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.

"""Command for listing subnetworks."""

from __future__ import absolute_import
from __future__ import division
from __future__ import unicode_literals

from googlecloudsdk.api_lib.compute import base_classes
from googlecloudsdk.api_lib.compute import lister
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.compute.networks.subnets import flags
from googlecloudsdk.command_lib.util.apis import arg_utils


@base.ReleaseTracks(base.ReleaseTrack.GA)
@base.UniverseCompatible
class List(base.ListCommand):
  """List subnetworks."""

  _include_view = True

  _default_list_format = flags.DEFAULT_LIST_FORMAT_WITH_IPV6_FIELD
  _utilization_details_list_format = (
      flags.DEFAULT_LIST_FORMAT_WITH_UTILIZATION_FIELD
  )

  @classmethod
  def Args(cls, parser):

    if cls._include_view:
      parser.display_info.AddFormat(cls._utilization_details_list_format)
    else:
      parser.display_info.AddFormat(cls._default_list_format)
    lister.AddRegionsArg(parser)
    parser.display_info.AddCacheUpdater(flags.SubnetworksCompleter)

    parser.add_argument(
        '--network',
        help='Only show subnetworks of a specific network.')

    if cls._include_view:
      parser.add_argument(
          '--view',
          choices={
              'WITH_UTILIZATION': (
                  'Output includes the IP address utilization data of all'
                  ' subnetwork ranges, showing total allocated and free IPv4'
                  ' and IPv6 IP addresses.'
              ),
          },
          type=arg_utils.ChoiceToEnumName,
          action='append',
          help=(
              'Specifies the information to include in the output.'
          ),
      )

  def _GetSubnetworkViews(self, view, request_message):
    views = []
    if view is None:
      return views
    for v in view:
      if v == 'WITH_UTILIZATION':
        views.append(request_message.ViewsValueValuesEnum.WITH_UTILIZATION)
    return views

  def Run(self, args):
    holder = base_classes.ComputeApiHolder(self.ReleaseTrack())
    client = holder.client

    request_data = lister.ParseMultiScopeFlags(args, holder.resources)

    if self._include_view:
      list_implementation = lister.MultiScopeLister(
          client=client,
          regional_service=client.apitools_client.subnetworks,
          aggregation_service=client.apitools_client.subnetworks,
          subnetwork_views_flag=self._GetSubnetworkViews(
              args.view, client.messages.ComputeSubnetworksListRequest
          ),
      )
    else:
      list_implementation = lister.MultiScopeLister(
          client=client,
          regional_service=client.apitools_client.subnetworks,
          aggregation_service=client.apitools_client.subnetworks,
      )

    for resource in lister.Invoke(request_data, list_implementation):
      if args.network is None:
        yield resource
      elif 'network' in resource:
        network_ref = holder.resources.Parse(resource['network'])
        if network_ref.Name() == args.network:
          yield resource


@base.ReleaseTracks(base.ReleaseTrack.BETA)
@base.UniverseCompatible
class ListBeta(List):
  """Create a subnet in the Beta release track."""

  _include_view = True


@base.ReleaseTracks(base.ReleaseTrack.ALPHA)
@base.UniverseCompatible
class ListAlpha(ListBeta):
  """Describe a subnet in the Alpha release track."""

  _include_view = True


List.detailed_help = base_classes.GetRegionalListerHelp('subnetworks')