# -*- coding: utf-8 -*- #
# Copyright 2023 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.
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"""Command to set service account email to zonal instance settings."""

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

from googlecloudsdk.api_lib.compute import base_classes
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.compute.instance_settings import flags
from googlecloudsdk.core import properties


@base.ReleaseTracks(base.ReleaseTrack.ALPHA)
@base.Hidden
class SetServiceAccount(base.UpdateCommand):
  """Set service account in zonal instance settings."""

  detailed_help = {'EXAMPLES': """
        To update the instance settings in the zone called ``us-central1-a''
        in the project ``my-gcp-project'' with service account email ``example@serviceaccount.com'', run:

          $ {command} example@serviceaccount.com --zone=us-central1-a --project=my-gcp-project
      """}

  @staticmethod
  def Args(parser):
    flags.AddServiceAccountFlags(parser)

  def Run(self, args):
    holder = base_classes.ComputeApiHolder(self.ReleaseTrack())
    client = holder.client
    service = client.apitools_client.instanceSettings
    get_request = client.messages.ComputeInstanceSettingsGetRequest(
        project=properties.VALUES.core.project.GetOrFail(), zone=args.zone
    )
    fingerprint = client.MakeRequests([(service, 'Get', get_request)])[
        0
    ].fingerprint
    request = client.messages.ComputeInstanceSettingsPatchRequest(
        instanceSettings=client.messages.InstanceSettings(
            email=getattr(args, 'SERVICE_ACCOUNT_EMAIL', None),
            fingerprint=fingerprint,
        ),
        project=properties.VALUES.core.project.GetOrFail(),
        updateMask='email',
        zone=args.zone,
    )
    # TODO(b/271293873):Remove no_followup=True once singleton support is added.
    return client.MakeRequests(
        [(service, 'Patch', request)],
        no_followup=True,
    )[0]