# Copyright 2017 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.
"""ml operations wait command."""
from googlecloudsdk.api_lib.ml import operations
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.ml import flags
from googlecloudsdk.core import resources


class Wait(base.CreateCommand):
  """Wait for a Cloud ML operation to complete.

  Given an operation ID, this command polls the operation and blocks until it
  completes. At completion, the operation message is printed (which includes the
  operation response).
  """

  @staticmethod
  def Args(parser):
    flags.OPERATION_NAME.AddToParser(parser)

  def Run(self, args):
    operations_client = operations.OperationsClient()
    operation_ref = resources.REGISTRY.Parse(
        args.operation, collection='ml.projects.operations')
    operation = operations_client.Get(operation_ref)
    return operations_client.WaitForOperation(operation)
