# -*- coding: utf-8 -*- #
# Copyright 2020 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.
"""Vertex AI endpoints update command."""

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

from googlecloudsdk.api_lib.ai.endpoints import client
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.ai import constants
from googlecloudsdk.command_lib.ai import endpoint_util
from googlecloudsdk.command_lib.ai import errors
from googlecloudsdk.command_lib.ai import flags
from googlecloudsdk.command_lib.ai import region_util
from googlecloudsdk.command_lib.ai import validation
from googlecloudsdk.command_lib.util.args import labels_util
from googlecloudsdk.core import log


def _AddArgs(parser):
  flags.AddEndpointResourceArg(
      parser, 'to update', prompt_func=region_util.PromptForOpRegion)
  flags.GetDisplayNameArg('endpoint', required=False).AddToParser(parser)
  flags.GetDescriptionArg('endpoint').AddToParser(parser)
  flags.AddTrafficSplitGroupArgs(parser)
  flags.AddRequestResponseLoggingConfigUpdateGroupArgs(parser)
  labels_util.AddUpdateLabelsFlags(parser)


def _Run(args, version):
  """Update an existing Vertex AI endpoint."""
  validation.ValidateDisplayName(args.display_name)

  endpoint_ref = args.CONCEPTS.endpoint.Parse()
  args.region = endpoint_ref.AsDict()['locationsId']
  with endpoint_util.AiplatformEndpointOverrides(version, region=args.region):
    endpoints_client = client.EndpointsClient(version=version)

    def GetLabels():
      return endpoints_client.Get(endpoint_ref).labels

    try:
      if version == constants.GA_VERSION:
        op = endpoints_client.Patch(
            endpoint_ref,
            labels_util.ProcessUpdateArgsLazy(
                args, endpoints_client.messages.GoogleCloudAiplatformV1Endpoint
                .LabelsValue, GetLabels),
            display_name=args.display_name,
            description=args.description,
            traffic_split=args.traffic_split,
            clear_traffic_split=args.clear_traffic_split,
            request_response_logging_table=args.request_response_logging_table,
            request_response_logging_rate=args.request_response_logging_rate,
            disable_request_response_logging=args
            .disable_request_response_logging)
      else:
        op = endpoints_client.PatchBeta(
            endpoint_ref,
            labels_util.ProcessUpdateArgsLazy(
                args, endpoints_client.messages
                .GoogleCloudAiplatformV1beta1Endpoint.LabelsValue, GetLabels),
            display_name=args.display_name,
            description=args.description,
            traffic_split=args.traffic_split,
            clear_traffic_split=args.clear_traffic_split,
            request_response_logging_table=args.request_response_logging_table,
            request_response_logging_rate=args.request_response_logging_rate,
            disable_request_response_logging=args
            .disable_request_response_logging)
    except errors.NoFieldsSpecifiedError:
      available_update_args = [
          'display_name', 'traffic_split', 'clear_traffic_split',
          'update_labels', 'clear_labels', 'remove_labels', 'description',
          'request_response_logging_table', 'request_response_logging_rate',
          'disable_request_response_logging'
      ]
      if not any(args.IsSpecified(arg) for arg in available_update_args):
        raise
      log.status.Print('No update to perform.')
      return None
    else:
      log.UpdatedResource(op.name, kind='Vertex AI endpoint')
      return op


@base.ReleaseTracks(base.ReleaseTrack.GA)
@base.UniverseCompatible
class UpdateGa(base.UpdateCommand):
  """Update an existing Vertex AI endpoint.

  ## EXAMPLES

  To update an endpoint ``123'' under project ``example'' in region
  ``us-central1'', run:

    $ {command} 123 --project=example --region=us-central1
    --display-name=new_name
  """

  @staticmethod
  def Args(parser):
    _AddArgs(parser)

  def Run(self, args):
    return _Run(args, constants.GA_VERSION)


@base.ReleaseTracks(base.ReleaseTrack.BETA, base.ReleaseTrack.ALPHA)
@base.UniverseCompatible
class UpdateBeta(UpdateGa):
  """Update an existing Vertex AI endpoint.

  ## EXAMPLES

  To update an endpoint ``123'' under project ``example'' in region
  ``us-central1'', run:

    $ {command} 123 --project=example --region=us-central1
    --display-name=new_name
  """

  def Run(self, args):
    return _Run(args, constants.BETA_VERSION)
