# -*- coding: utf-8 -*- #
# Copyright 2014 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.
"""List node pools 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.command_lib.container import flags
from googlecloudsdk.core import properties


DETAILED_HELP = {
    'DESCRIPTION': """\
        *{command}* displays all node pools in the Google Kubernetes Engine
        cluster.
        """,
    'EXAMPLES': """\
        To list all node pools in the cluster "sample-cluster" in table form,
        run:

          $ {command} --cluster=sample-cluster
     """,
}


class List(base.ListCommand):
  """List existing node pools for a cluster."""

  @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.
    """
    flags.AddNodePoolClusterFlag(parser, 'The name of the cluster.')
    parser.display_info.AddFormat(util.NODEPOOLS_FORMAT)

  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)

    cluster = properties.VALUES.container.cluster.Get(required=True)
    cluster_ref = adapter.ParseCluster(cluster, location)

    try:
      res = adapter.ListNodePools(cluster_ref)
      return res.nodePools
    except apitools_exceptions.HttpError as error:
      raise exceptions.HttpException(error, util.HTTP_ERROR_FORMAT)


List.detailed_help = DETAILED_HELP
