# -*- coding: utf-8 -*- #
# Copyright 2014 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 deleting instance templates."""

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 utils
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.compute import completers
from googlecloudsdk.command_lib.compute import flags as compute_flags
from googlecloudsdk.command_lib.compute import scope as compute_scope
from googlecloudsdk.command_lib.compute.instance_templates import flags


@base.ReleaseTracks(base.ReleaseTrack.GA, base.ReleaseTrack.BETA,
                    base.ReleaseTrack.ALPHA)
class DeleteGA(base.DeleteCommand):
  """Delete Compute Engine virtual machine instance templates."""

  @staticmethod
  def GetServiceClient(client, ref):
    if ref.Collection() == 'compute.instanceTemplates':
      return client.apitools_client.instanceTemplates
    else:
      return client.apitools_client.regionInstanceTemplates

  @staticmethod
  def GetRequestMessage(client, ref):
    if ref.Collection() == 'compute.instanceTemplates':
      return client.messages.ComputeInstanceTemplatesDeleteRequest
    else:
      return client.messages.ComputeRegionInstanceTemplatesDeleteRequest

  @classmethod
  def Args(cls, parser):
    cls.InstanceTemplateArg = flags.MakeInstanceTemplateArg(
        plural=True, include_regional=True)
    cls.InstanceTemplateArg.AddArgument(parser, operation_type='delete')
    parser.display_info.AddCacheUpdater(completers.InstanceTemplatesCompleter)

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

    instance_template_refs = self.InstanceTemplateArg.ResolveAsResource(
        args,
        holder.resources,
        scope_lister=compute_flags.GetDefaultScopeLister(client),
        default_scope=compute_scope.ScopeEnum.GLOBAL)

    utils.PromptForDeletion(instance_template_refs)

    requests = []
    for ref in instance_template_refs:
      service_client = self.GetServiceClient(client, ref)
      request_message = self.GetRequestMessage(client, ref)
      requests.append(
          (service_client, 'Delete', request_message(**ref.AsDict())))

    return client.MakeRequests(requests)


DeleteGA.detailed_help = {
    'brief':
        'Delete Compute Engine virtual machine instance templates',
    'DESCRIPTION':
        """\
        *{command}* deletes one or more Compute Engine virtual machine
        instance templates.
        """,
    'EXAMPLES':
        """\
        To delete the instance template named 'INSTANCE-TEMPLATE', run:

          $ {command} INSTANCE-TEMPLATE
        """
}