# -*- 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.
"""Set up flags for creating or updating a workerpool."""

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

from googlecloudsdk.calliope import actions
from googlecloudsdk.calliope import arg_parsers
from googlecloudsdk.calliope import base

_PWP_CONFIG_LINK = 'https://cloud.google.com/build/docs/private-pools/worker-pool-config-file-schema'

_CREATE_FILE_DESC = (
    'File that contains the configuration for the'
    ' worker pool to be created. See %s for options.' % _PWP_CONFIG_LINK
)
_UPDATE_FILE_DESC = (
    'File that contains updates to the configuration for'
    ' the worker pool. See %s for options.' % _PWP_CONFIG_LINK
)

_CREATE_FILE_DESC_ALPHA_BETA = (
    'File that contains the configuration for the worker pool to be '
    'created.\n\nPrivate pool options:\n\n %s\n\n' % (_PWP_CONFIG_LINK)
)
_UPDATE_FILE_DESC_ALPHA_BETA = (
    'File that contains updates to the configuration for worker pool to be '
    'created.\n\n'
    'Private pool options:\n\n %s\n\n' % (_PWP_CONFIG_LINK)
)

DEFAULT_FLAG_VALUES = {
    'BUILDER_IMAGE_CACHING': 'CACHING_DISABLED',
    'DISK_SIZE': '60GB',
    'MEMORY': '4.0GB',
    'VCPU_COUNT': 1.0,
}


def AddWorkerpoolArgs(parser, release_track, update=False):
  """Set up all the argparse flags for creating or updating a workerpool.

  Args:
    parser: An argparse.ArgumentParser-like object.
    release_track: A base.ReleaseTrack-like object.
    update: If true, use the version of the flags for updating a workerpool.
      Otherwise, use the version for creating a workerpool.

  Returns:
    The parser argument with workerpool flags added in.
  """
  verb = 'update' if update else 'create'
  parser.add_argument(
      'WORKER_POOL',
      help=(
          'Unique identifier for the worker pool to %s. This value should be'
          ' 1-63 characters, and valid characters are [a-z][0-9]-'
      )
      % verb,
  )
  parser.add_argument(
      '--region',
      help=(
          'Cloud region where the worker pool is %sd. See'
          ' https://cloud.google.com/build/docs/locations for available'
          ' locations.'
      )
      % verb,
  )
  file_or_flags = parser.add_mutually_exclusive_group(required=update)
  if (
      release_track != base.ReleaseTrack.ALPHA
      and release_track != base.ReleaseTrack.BETA
  ):
    file_or_flags.add_argument(
        '--config-from-file',
        help=(_UPDATE_FILE_DESC if update else _CREATE_FILE_DESC),
    )
  else:
    file_or_flags.add_argument(
        '--config-from-file',
        help=(
            _UPDATE_FILE_DESC_ALPHA_BETA
            if update
            else _CREATE_FILE_DESC_ALPHA_BETA
        ),
    )
  flags = file_or_flags.add_argument_group(
      'Command-line flags to configure the private pool:'
  )
  network_flags = flags.add_mutually_exclusive_group()
  service_network_flags = network_flags.add_argument_group(
      'Network configuration for Service Networking:'
  )
  if not update:
    service_network_flags.add_argument(
        '--peered-network',
        help="""\
Existing network to which workers are peered. The network is specified in
resource URL format
projects/{network_project}/global/networks/{network_name}.

If not specified, the workers are not peered to any network.
""",
    )
    service_network_flags.add_argument(
        '--peered-network-ip-range',
        help="""\
An IP range for your peered network. Specify the IP range using Classless
Inter-Domain Routing (CIDR) notation with a slash and the subnet prefix size,
such as `/29`.

Your subnet prefix size must be between 1 and 29.  Optional: you can specify an
IP address before the subnet prefix value - for example `192.168.0.0/24`.

If no IP address is specified, your VPC automatically determines the starting
IP for the range. If no IP range is specified, Cloud Build uses `/24` as the
default network IP range.
""",
    )
    if (
        release_track == base.ReleaseTrack.ALPHA
        or release_track == base.ReleaseTrack.BETA
    ):
      private_service_connect_flags = network_flags.add_argument_group(
          'Network configuration for Private Service Connect interface:'
      )
      private_service_connect_flags.add_argument(
          '--network-attachment',
          help="""\
  The network attachment that the worker network interface is peered to. The
  network attachment is specified in resource URL format
  projects/{project}/regions/{region}/networkAttachments/{name}.
  The region of network attachment must be the same as the worker pool.
  See https://cloud.google.com/vpc/docs/about-network-attachments for details.
  """,
      )
      private_service_connect_flags.add_argument(
          '--route-all-traffic',
          action='store_true',
          help="""\
  Route all traffic through PSC interface. Enable this if you want full control
  of traffic in the private pool. Configure Cloud NAT for the subnet of network
  attachment if you need to access public Internet.

  If unset, Only route private IPs, e.g. 10.0.0.0/8, 172.16.0.0/12,
  and 192.168.0.0/16 through PSC interface.
  """,
      )
      private_service_connect_flags.add_argument(
          '--disable-public-ip-address',
          action='store_true',
          help="""\
  If set, workers in the worker pool are created without an external IP address.

  If the worker pool is within a VPC Service Control perimeter, use this flag.
  """,
      )

  worker_flags = flags.add_argument_group(
      'Configuration to be used for creating workers in the worker pool:'
  )
  worker_flags.add_argument(
      '--worker-machine-type',
      help="""\
Compute Engine machine type for a worker pool.

If unspecified, Cloud Build uses a standard machine type.
""",
  )
  worker_flags.add_argument(
      '--worker-disk-size',
      type=arg_parsers.BinarySize(lower_bound='100GB'),
      help="""\
Size of the disk attached to the worker.

If unspecified, Cloud Build uses a standard disk size.
""",
  )

  if release_track == base.ReleaseTrack.GA:
    worker_flags.add_argument(
        '--no-external-ip',
        hidden=release_track == base.ReleaseTrack.GA,
        action=actions.DeprecationAction(
            '--no-external-ip',
            warn=(
                'The `--no-external-ip` option is deprecated; use'
                ' `--no-public-egress` and/or `--public-egress instead`.'
            ),
            removed=False,
            action='store_true',
        ),
        help="""\
  If set, workers in the worker pool are created without an external IP address.

  If the worker pool is within a VPC Service Control perimeter, use this flag.
  """,
    )

  if update:
    service_network_flags.add_argument(
        '--public-egress',
        action=arg_parsers.StoreTrueFalseAction,
        help="""\
        If set to true, workers in the worker pool are created with an external
        IP address.

        If set to false, workers in the worker pool are created without an
        external IP address. If the worker pool is within a VPC Service Control
        perimeter, use this flag.
        """,
    )
  else:
    service_network_flags.add_argument(
        '--no-public-egress',
        action='store_true',
        help="""\
If set, workers in the worker pool are created without an external IP address.

If the worker pool is within a VPC Service Control perimeter, use this flag.
""",
    )

  return parser


def AddWorkerpoolCreateArgs(parser, release_track):
  """Set up all the argparse flags for creating a workerpool.

  Args:
    parser: An argparse.ArgumentParser-like object.
    release_track: A base.ReleaseTrack-like object.

  Returns:
    The parser argument with workerpool flags added in.
  """
  return AddWorkerpoolArgs(parser, release_track, update=False)


def AddWorkerpoolUpdateArgs(parser, release_track):
  """Set up all the argparse flags for updating a workerpool.

  Args:
    parser: An argparse.ArgumentParser-like object.
    release_track: A base.ReleaseTrack-like object.

  Returns:
    The parser argument with workerpool flags added in.
  """
  return AddWorkerpoolArgs(parser, release_track, update=True)