# -*- coding: utf-8 -*- #
# Copyright 2016 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.
"""Abort operation command."""

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

from apitools.base.py import exceptions as apitools_exceptions

from googlecloudsdk.api_lib.container import util
from googlecloudsdk.calliope import base
from googlecloudsdk.calliope import exceptions
from googlecloudsdk.core import log
from googlecloudsdk.core.console import console_io

CANCEL_OPERATION_MESSAGE = (
    'Cancelation of operation {0} has been requested. '
    'Please use gcloud container operations describe {1} to '
    'check if the operation has been canceled successfully.')


class Cancel(base.Command):
  """Cancel an operation."""

  @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 cancel.')

  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']
    location_get = self.context['location_get']
    location = location_get(args)
    op_ref = adapter.ParseOperation(args.operation_id, location)
    try:
      op = adapter.GetOperation(op_ref)
    except apitools_exceptions.HttpError as error:
      raise exceptions.HttpException(error, util.HTTP_ERROR_FORMAT)

    console_io.PromptContinue(
        message='Are you sure you want to cancel operation {0}?'.format(
            op.name),
        throw_if_unattended=True,
        cancel_on_no=True)

    try:
      adapter.CancelOperation(op_ref)
      log.status.Print(
          CANCEL_OPERATION_MESSAGE.format(args.operation_id, args.operation_id))
      return adapter.GetOperation(op_ref)
    except apitools_exceptions.HttpError as error:
      raise exceptions.HttpException(error)


Cancel.detailed_help = {
    'brief':
        'Cancel a running operation.',
    'DESCRIPTION':
        """
        Cancel a running operation.

Cancel is a best-effort method for aborting a running operation. Operations that
have already completed can not be cancelled. If the operation has passed the
"point of no-return", cancel will have no effect.

An example of "point of no-return" in the context of Upgrade operations would
be if all the nodes have been upgraded but the operation hasn't been marked as
complete.

Only node pool upgrade operations support cancellation.
""",
    'EXAMPLES':
        """\
        To cancel an operation, run:

          $ {command} sample-operation-id
        """,
}