# -*- 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.
"""Create worker pool command."""

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

from googlecloudsdk.api_lib.cloudbuild import cloudbuild_exceptions
from googlecloudsdk.api_lib.cloudbuild import cloudbuild_util
from googlecloudsdk.api_lib.cloudbuild import workerpool_config
from googlecloudsdk.api_lib.compute import utils as compute_utils
from googlecloudsdk.api_lib.util import waiter
from googlecloudsdk.calliope import base
from googlecloudsdk.calliope import exceptions
from googlecloudsdk.command_lib.cloudbuild import workerpool_flags
from googlecloudsdk.core import log
from googlecloudsdk.core import properties
from googlecloudsdk.core import resources


@base.ReleaseTracks(base.ReleaseTrack.GA)
@base.UniverseCompatible
class Create(base.CreateCommand):
  """Create a worker pool for use by Google Cloud Build."""

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

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

          To create a worker pool in project `p1` in region `us-central1` where workers are of machine type
          `e2-standard-2` and are peered to the VPC network `projects/123/global/networks/default` within the IP range `192.168.0.0/28`
          and have a disk size of 64GB, run:

            $ {command} wp1 --project=p1 --region=us-central1 \
                --peered-network=projects/123/global/networks/default \
                --peered-network-ip-range=192.168.0.0/28
                --worker-machine-type=e2-standard-2 \
                --worker-disk-size=64GB
          """,
  }

  @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 = workerpool_flags.AddWorkerpoolCreateArgs(parser,
                                                      base.ReleaseTrack.GA)
    parser.display_info.AddFormat("""
          table(
            name.segment(-1),
            createTime.date('%Y-%m-%dT%H:%M:%S%Oz', undefined='-'),
            state
          )
        """)

  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.
    """

    return _CreateWorkerPoolFirstGen(args, self.ReleaseTrack())


@base.ReleaseTracks(base.ReleaseTrack.BETA)
class CreateBeta(Create):
  """Create a worker pool for use by 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 = workerpool_flags.AddWorkerpoolCreateArgs(parser,
                                                      base.ReleaseTrack.BETA)
    parser.add_argument(
        '--generation',
        default=1,
        type=int,
        help=('Generation of the worker pool.'),
    )
    parser.display_info.AddFormat("""
          table(
            name.segment(-1),
            createTime.date('%Y-%m-%dT%H:%M:%S%Oz', undefined='-'),
            state
          )
        """)

  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:
      return _CreateWorkerPoolFirstGen(args, self.ReleaseTrack())
    if args.generation == 2:
      raise exceptions.InvalidArgumentException(
          '--generation',
          'for generation=2 please use the gcloud command "gcloud builds'
          ' worker-pools apply" to create a worker pool',
      )

    raise exceptions.InvalidArgumentException(
        '--generation',
        'please use one of the following valid generation values: 1, 2',
    )


@base.ReleaseTracks(base.ReleaseTrack.ALPHA)
class CreateAlpha(Create):
  """Create a private pool for use by Cloud Build."""

  detailed_help = {
      'DESCRIPTION': '{description}',
      'EXAMPLES': """\

        * Private pools

        To create a private pool named `pwp1` in region `us-central1`, run:

          $ {command} pwp1 --region=us-central1

        To create a private pool in project `p1` in region `us-central1` where workers are of machine type
        `e2-standard-2` and are peered to the VPC network `projects/123/global/networks/default` within the IP range `192.168.0.0/28`
        and have a disk size of 64GB, run:

          $ {command} pwp1 --project=p1 --region=us-central1 --peered-network=projects/123/global/networks/default --peered-network-ip-range=192.168.0.0/28 --worker-machine-type=e2-standard-2 --worker-disk-size=64GB

        To create a private pool in project `p1` in region `us-central1` where workers are of machine type
        `e2-standard-2` and are peered to the network attachment
        `projects/p1/regions/us-central1/networkAttachments/na`. The workers don't
        have public IP address and all the traffic is routed to the network attachment.

          $ {command} pwp1 --project=p1 --region=us-central1 \
              --network-attachment=projects/p1/regions/us-central1/networkAttachments/na \
              --route-all-traffic \
              --disable-public-ip-address \
              --worker-machine-type=e2-standard-2
        """,
  }

  @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 = workerpool_flags.AddWorkerpoolCreateArgs(parser,
                                                      base.ReleaseTrack.ALPHA)
    parser.add_argument(
        '--generation',
        default=1,
        type=int,
        help=('Generation of the worker pool.'),
    )
    parser.display_info.AddFormat("""
          table(
            name.segment(-1),
            createTime.date('%Y-%m-%dT%H:%M:%S%Oz', undefined='-'),
            state
          )
        """)

  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:
      return _CreateWorkerPoolFirstGen(args, self.ReleaseTrack())
    if args.generation == 2:
      raise exceptions.InvalidArgumentException(
          '--generation',
          'for generation=2 please use the gcloud command "gcloud builds'
          ' worker-pools apply" to create a worker pool',
      )

    raise exceptions.InvalidArgumentException(
        '--generation',
        'please use one of the following valid generation values: 1, 2',
    )


def _CreateWorkerPoolFirstGen(args, release_track):
  """Creates a Worker Pool First Generation.

  Args:
    args: an argparse namespace. All the arguments that were provided to the
        create command invocation.
    release_track: The desired value of the enum
      googlecloudsdk.calliope.base.ReleaseTrack.

  Returns:
    A Worker Pool First Generation resource.
  """
  wp_name = args.WORKER_POOL
  wp_region = args.region
  if not wp_region:
    wp_region = properties.VALUES.builds.region.GetOrFail()

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

  # Get the workerpool proto from either the flags or the specified file.
  wp = messages.WorkerPool()
  if args.config_from_file is not None:
    try:
      wp = workerpool_config.LoadWorkerpoolConfigFromPath(
          args.config_from_file, messages.WorkerPool
      )
      # Public IP in primary network interface of VM has to be disabled when
      # routing all the traffic to network attachment.
      config = wp.privatePoolV1Config
      if (
          release_track == base.ReleaseTrack.ALPHA
          and config.privateServiceConnect is not None
          and config.privateServiceConnect.routeAllTraffic
          and config.privateServiceConnect.publicIpAddressDisabled is None
      ):
        config.privateServiceConnect.publicIpAddressDisabled = True
    except cloudbuild_exceptions.ParseProtoException as err:
      log.err.Print(
          '\nFailed to parse configuration from file. If you'
          ' were a Private Preview user, note that the format for this'
          ' file has changed slightly for GA.\n')
      raise err
  else:
    wp.privatePoolV1Config = messages.PrivatePoolV1Config()

    network_config = messages.NetworkConfig()
    if args.peered_network is not None:
      network_config.peeredNetwork = args.peered_network
      if args.peered_network_ip_range is not None:
        network_config.peeredNetworkIpRange = args.peered_network_ip_range
    # All of the egress flags are mutually exclusive with each other.
    if args.no_public_egress or (
        release_track == base.ReleaseTrack.GA and args.no_external_ip
    ):
      network_config.egressOption = (
          messages.NetworkConfig.EgressOptionValueValuesEnum.NO_PUBLIC_EGRESS
      )
    wp.privatePoolV1Config.networkConfig = network_config

    worker_config = messages.WorkerConfig()
    if args.worker_machine_type is not None:
      worker_config.machineType = args.worker_machine_type
    if args.worker_disk_size is not None:
      worker_config.diskSizeGb = compute_utils.BytesToGb(
          args.worker_disk_size)
    wp.privatePoolV1Config.workerConfig = worker_config

    if release_track == base.ReleaseTrack.ALPHA:
      private_service_connect = messages.PrivateServiceConnect()
      if args.network_attachment:
        private_service_connect.networkAttachment = args.network_attachment
      if args.disable_public_ip_address:
        private_service_connect.publicIpAddressDisabled = True
      if args.route_all_traffic:
        # Public IP in primary network interface of VM has to be disabled when
        # routing all the traffic to network attachment.
        private_service_connect.publicIpAddressDisabled = True
        private_service_connect.routeAllTraffic = True
      if (
          args.network_attachment
          or args.disable_public_ip_address
          or args.route_all_traffic
      ):
        # Private Service Connect related fields are specified, remove
        # network config.
        wp.privatePoolV1Config.networkConfig = None
        wp.privatePoolV1Config.privateServiceConnect = private_service_connect

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

  # Get the parent project.location ref
  parent_resource = resources.REGISTRY.Create(
      collection='cloudbuild.projects.locations',
      projectsId=parent,
      locationsId=wp_region)

  # Send the Create request
  created_op = client.projects_locations_workerPools.Create(
      messages.CloudbuildProjectsLocationsWorkerPoolsCreateRequest(
          workerPool=wp,
          parent=parent_resource.RelativeName(),
          workerPoolId=wp_name))

  op_resource = resources.REGISTRY.ParseRelativeName(
      created_op.name, collection='cloudbuild.projects.locations.operations')
  created_wp = waiter.WaitFor(
      waiter.CloudOperationPoller(client.projects_locations_workerPools,
                                  client.projects_locations_operations),
      op_resource, 'Creating worker pool',
      max_wait_ms=3600000)  # 1 hour

  # 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,
      })

  log.CreatedResource(wp_resource)

  return created_wp