# Copyright 2018 Google 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.
"""Command for removing resource policies to instances."""
from __future__ import absolute_import
from __future__ import unicode_literals
from googlecloudsdk.api_lib.compute import base_classes
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.compute.instances import flags as instance_flags
from googlecloudsdk.command_lib.compute.resource_policies import flags
from googlecloudsdk.command_lib.compute.resource_policies import util


@base.ReleaseTracks(base.ReleaseTrack.ALPHA)
class InstancesRemoveResourcePolicies(base.UpdateCommand):
  """Remove resource policies to Google Compute Engine VM instances.

    *{command}* removes resource policies from Google Compute
    Engine virtual instances.
  """

  @staticmethod
  def Args(parser):
    instance_flags.INSTANCE_ARG.AddArgument(
        parser, operation_type='remove resource policies from')
    flags.AddResourcePoliciesArgs(
        parser, 'removed from', required=True)

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

    instance_ref = instance_flags.INSTANCE_ARG.ResolveAsResource(
        args,
        holder.resources,
        scope_lister=instance_flags.GetInstanceZoneScopeLister(client))

    resource_policies = []
    for policy in args.resource_policies:
      resource_policy_ref = util.ParseResourcePolicyWithZone(
          holder.resources,
          policy,
          project=instance_ref.project,
          zone=instance_ref.zone)
      resource_policies.append(resource_policy_ref.SelfLink())

    remove_request = messages.ComputeInstancesRemoveResourcePoliciesRequest(
        instance=instance_ref.Name(),
        project=instance_ref.project,
        zone=instance_ref.zone,
        instancesRemoveResourcePoliciesRequest=
        messages.InstancesRemoveResourcePoliciesRequest(
            resourcePolicies=resource_policies))

    return client.MakeRequests([(client.apitools_client.instances,
                                 'RemoveResourcePolicies', remove_request)])
