# -*- coding: utf-8 -*- #
# Copyright 2021 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
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"""Implementation of objects add-iam-policy-binding command."""

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

from googlecloudsdk.api_lib.storage import api_factory
from googlecloudsdk.api_lib.util import apis
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.iam import iam_util
from googlecloudsdk.command_lib.storage import errors_util
from googlecloudsdk.command_lib.storage import iam_command_util
from googlecloudsdk.command_lib.storage import storage_url
from googlecloudsdk.command_lib.storage.tasks import set_iam_policy_task


@base.Hidden
@base.UniverseCompatible
class AddIamPolicyBinding(base.Command):
  """Grant a principal access to an object."""

  detailed_help = {
      'DESCRIPTION':
          """
      Add an IAM policy binding to an object. For more information, see [Cloud
      Identity and Access
      Management](https://cloud.google.com/storage/docs/access-control/iam).
      """,
      'EXAMPLES':
          """
      To grant full control of OBJECT in BUCKET to the user
      john.doe@example.com:

        $ {command} gs://BUCKET/OBJECT --member=user:john.doe@example.com --role=roles/storage.legacyObjectOwner

      To make OBJECT publicly readable:

        $ {command} gs://BUCKET/OBJECT --member=AllUsers --role=roles/storage.legacyObjectReader
      """,
  }

  @staticmethod
  def Args(parser):
    parser.add_argument(
        'url', help='URL of bucket to add IAM policy binding to.')
    iam_util.AddArgsForAddIamPolicyBinding(parser, add_condition=True)

  def Run(self, args):
    url_object = storage_url.storage_url_from_string(args.url)
    errors_util.raise_error_if_not_cloud_object(args.command_path, url_object)
    errors_util.raise_error_if_not_gcs(args.command_path, url_object)

    policy = api_factory.get_api(url_object.scheme).get_object_iam_policy(
        url_object.bucket_name, url_object.resource_name, url_object.generation)
    return iam_command_util.add_iam_binding_to_resource(
        args,
        url_object,
        apis.GetMessagesModule('storage', 'v1'),
        policy,
        set_iam_policy_task.SetObjectIamPolicyTask,
    )
