# -*- coding: utf-8 -*- #
# Copyright 2018 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.
"""Delete worker pool command."""

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

from googlecloudsdk.api_lib.cloudbuild import cloudbuild_util
from googlecloudsdk.api_lib.cloudbuild.v2 import client_util as cloudbuild_v2_util
from googlecloudsdk.api_lib.util import waiter
from googlecloudsdk.calliope import base
from googlecloudsdk.calliope import exceptions
from googlecloudsdk.core import log
from googlecloudsdk.core import properties
from googlecloudsdk.core import resources


@base.ReleaseTracks(base.ReleaseTrack.GA)
@base.UniverseCompatible
class Delete(base.DeleteCommand):
  """Delete a worker pool from Cloud Build."""

  detailed_help = {
      'DESCRIPTION':
          '{description}',
      'EXAMPLES':
          """\
          To delete a worker pool named `wp1` in region `us-central1`, run:

            $ {command} wp1 --region=us-central1
          """,
  }

  @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(
        '--region',
        help='The Cloud region where the worker pool is.')
    parser.add_argument(
        'WORKER_POOL', help='The ID of the worker pool to delete.')

  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.
    """

    _DeleteWorkerPoolFirstGen(args, self.ReleaseTrack())


@base.ReleaseTracks(base.ReleaseTrack.BETA)
class DeleteBeta(Delete):
  """Delete a worker pool from Google Cloud Build."""

  @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(
        '--region',
        help='The Cloud region where the worker pool is.')
    parser.add_argument(
        '--generation',
        default=1,
        type=int,
        help=('Generation of the worker pool.'))
    parser.add_argument(
        'WORKER_POOL', help='The ID of the worker pool to delete.')

  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.
    """

    if args.generation == 1:
      _DeleteWorkerPoolFirstGen(args, self.ReleaseTrack())
    elif args.generation == 2:
      _DeleteWorkerPoolSecondGen(args)
    else:
      raise exceptions.InvalidArgumentException(
          '--generation',
          'please use one of the following valid generation values: 1, 2',
      )


@base.ReleaseTracks(base.ReleaseTrack.ALPHA)
class DeleteAlpha(Delete):
  """Delete a private worker pool from Google Cloud Build."""

  @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(
        '--region',
        help='The Cloud region where the worker pool is.')
    parser.add_argument(
        '--generation',
        default=1,
        type=int,
        help=('Generation of the worker pool.'))
    parser.add_argument(
        'WORKER_POOL', help='The ID of the worker pool to delete.')

  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.
    """

    if args.generation == 1:
      _DeleteWorkerPoolFirstGen(args, self.ReleaseTrack())
    elif args.generation == 2:
      _DeleteWorkerPoolSecondGen(args)
    else:
      raise exceptions.InvalidArgumentException(
          '--generation',
          'please use one of the following valid generation values: 1, 2',
      )


def _DeleteWorkerPoolSecondGen(args):
  """Deletes a Worker Pool Second Generation.

  Args:
    args: an argparse namespace. All the arguments that were provided to the
        delete command invocation.
  """
  client = cloudbuild_v2_util.GetClientInstance()
  messages = client.MESSAGES_MODULE

  wp_region = args.region
  if not wp_region:
    wp_region = properties.VALUES.builds.region.GetOrFail()

  # Get the workerpool second gen ref
  wp_resource = resources.REGISTRY.Parse(
      None,
      collection='cloudbuild.projects.locations.workerPoolSecondGen',
      api_version=cloudbuild_v2_util.GA_API_VERSION,
      params={
          'projectsId': properties.VALUES.core.project.Get(required=True),
          'locationsId': wp_region,
          'workerPoolSecondGenId': args.WORKER_POOL,
      })

  # Send the Delete request
  deleted_op = client.projects_locations_workerPoolSecondGen.Delete(
      messages.CloudbuildProjectsLocationsWorkerPoolSecondGenDeleteRequest(
          name=wp_resource.RelativeName()))

  op_resource = resources.REGISTRY.ParseRelativeName(
      deleted_op.name, collection='cloudbuild.projects.locations.operations')
  waiter.WaitFor(
      waiter.CloudOperationPollerNoResources(
          client.projects_locations_operations), op_resource,
      'Deleting worker pool second gen',
      max_wait_ms=3600000)  # 1 hour

  log.DeletedResource(wp_resource)


def _DeleteWorkerPoolFirstGen(args, release_track):
  """Deletes a Worker Pool First Generation.

  Args:
    args: an argparse namespace. All the arguments that were provided to the
        delete command invocation.
    release_track: The desired value of the enum
      googlecloudsdk.calliope.base.ReleaseTrack.
  """
  wp_region = args.region
  if not wp_region:
    wp_region = properties.VALUES.builds.region.GetOrFail()

  client = cloudbuild_util.GetClientInstance(release_track)
  messages = client.MESSAGES_MODULE

  parent = properties.VALUES.core.project.Get(required=True)

  wp_name = args.WORKER_POOL

  # Get the workerpool ref
  wp_resource = resources.REGISTRY.Parse(
      None,
      collection='cloudbuild.projects.locations.workerPools',
      api_version=cloudbuild_util.RELEASE_TRACK_TO_API_VERSION[release_track],
      params={
          'projectsId': parent,
          'locationsId': wp_region,
          'workerPoolsId': wp_name,
      })

  # Send the Delete request
  deleted_op = client.projects_locations_workerPools.Delete(
      messages.CloudbuildProjectsLocationsWorkerPoolsDeleteRequest(
          name=wp_resource.RelativeName()))

  op_resource = resources.REGISTRY.ParseRelativeName(
      deleted_op.name, collection='cloudbuild.projects.locations.operations')
  waiter.WaitFor(
      waiter.CloudOperationPollerNoResources(
          client.projects_locations_operations), op_resource,
      'Deleting worker pool',
      max_wait_ms=3600000)  # 1 hour

  log.DeletedResource(wp_resource)