# Copyright 2015 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.

"""Wait operations command."""
from googlecloudsdk.api_lib.container import util
from googlecloudsdk.calliope import base
from googlecloudsdk.calliope import exceptions
from googlecloudsdk.third_party.apitools.base.py import exceptions as apitools_exceptions


class Wait(base.Command):
  """Poll an operation for completion."""

  @staticmethod
  def Args(parser):
    """Register flags for this command.

    Args:
      parser: An argparse.ArgumentParser-like object. It is mocked out in order
          to capture some information, but behaves like an ArgumentParser.
    """
    parser.add_argument('operation_id', help='The operation id to poll.')

  def Run(self, args):
    """This is what gets called when the user runs this command.

    Args:
      args: an argparse namespace. All the arguments that were provided to this
        command invocation.

    Returns:
      Some value that we want to have printed later.
    """
    adapter = self.context['api_adapter']

    operation_ref = adapter.ParseOperation(args.operation_id)

    try:
      # Try fetching it first to ensure we have permissions and the op exists.
      adapter.GetOperation(operation_ref)

      return adapter.WaitForOperation(
          operation_ref,
          'Waiting for {0} to complete'.format(operation_ref.operationId))
    except apitools_exceptions.HttpError as error:
      raise exceptions.HttpException(util.GetError(error))
