# -*- coding: utf-8 -*- #
# Copyright 2015 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.
"""Command for creating HTTP2 health checks."""

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

from googlecloudsdk.api_lib.compute import base_classes
from googlecloudsdk.api_lib.compute import health_checks_utils
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.compute import completers
from googlecloudsdk.command_lib.compute.health_checks import flags


def _Run(args,
         holder,
         supports_response=False,
         supports_port_specification=False,
         regionalized=False):
  """Issues the request necessary for adding the health check."""
  client = holder.client
  messages = client.messages

  health_check_ref = flags.HealthCheckArgument(
      'HTTP2', include_alpha=regionalized).ResolveAsResource(
          args, holder.resources)
  proxy_header = messages.HTTP2HealthCheck.ProxyHeaderValueValuesEnum(
      args.proxy_header)
  http2_health_check = messages.HTTP2HealthCheck(
      host=args.host,
      port=args.port,
      portName=args.port_name,
      requestPath=args.request_path,
      proxyHeader=proxy_header)

  if supports_response:
    http2_health_check.response = args.response
  health_checks_utils.ValidateAndAddPortSpecificationToHealthCheck(
      args, http2_health_check, supports_port_specification)

  if health_checks_utils.IsRegionalHealthCheckRef(health_check_ref):
    request = messages.ComputeRegionHealthChecksInsertRequest(
        healthCheck=messages.HealthCheck(
            name=health_check_ref.Name(),
            description=args.description,
            type=messages.HealthCheck.TypeValueValuesEnum.HTTP2,
            http2HealthCheck=http2_health_check,
            checkIntervalSec=args.check_interval,
            timeoutSec=args.timeout,
            healthyThreshold=args.healthy_threshold,
            unhealthyThreshold=args.unhealthy_threshold,
        ),
        project=health_check_ref.project,
        region=health_check_ref.region)
    collection = client.apitools_client.regionHealthChecks
  else:
    request = messages.ComputeHealthChecksInsertRequest(
        healthCheck=messages.HealthCheck(
            name=health_check_ref.Name(),
            description=args.description,
            type=messages.HealthCheck.TypeValueValuesEnum.HTTP2,
            http2HealthCheck=http2_health_check,
            checkIntervalSec=args.check_interval,
            timeoutSec=args.timeout,
            healthyThreshold=args.healthy_threshold,
            unhealthyThreshold=args.unhealthy_threshold),
        project=health_check_ref.project)
    collection = client.apitools_client.healthChecks

  return client.MakeRequests([(collection, 'Insert', request)])


@base.ReleaseTracks(base.ReleaseTrack.BETA)
class Create(base.CreateCommand):
  """Create a HTTP2 health check to monitor load balanced instances."""

  @staticmethod
  def Args(parser, supports_use_serving_port=True, regionalized=False):
    parser.display_info.AddFormat(flags.DEFAULT_LIST_FORMAT)
    flags.HealthCheckArgument(
        'HTTP2', include_alpha=regionalized).AddArgument(
            parser, operation_type='create')
    health_checks_utils.AddHttpRelatedCreationArgs(
        parser, use_serving_port=supports_use_serving_port)
    health_checks_utils.AddHttpRelatedResponseArg(parser)
    health_checks_utils.AddProtocolAgnosticCreationArgs(parser, 'HTTP2')
    parser.display_info.AddCacheUpdater(completers.HealthChecksCompleterAlpha
                                        if regionalized else
                                        completers.HealthChecksCompleter)

  def Run(self, args):
    """Issues the request necessary for adding the health check."""
    holder = base_classes.ComputeApiHolder(self.ReleaseTrack())
    return _Run(
        args, holder, supports_response=True, supports_port_specification=True)


@base.ReleaseTracks(base.ReleaseTrack.ALPHA)
class CreateAlpha(Create):
  """Create a HTTP2 health check to monitor load balanced instances."""

  @staticmethod
  def Args(parser):
    Create.Args(parser, regionalized=True)

  def Run(self, args):
    """Issues the request necessary for adding the health check."""
    holder = base_classes.ComputeApiHolder(self.ReleaseTrack())
    return _Run(
        args,
        holder,
        supports_response=True,
        supports_port_specification=True,
        regionalized=True)


Create.detailed_help = {
    'brief': ('Create a HTTP2 health check to monitor load balanced instances'),
    'DESCRIPTION': """\
        *{command}* is used to create a HTTP2 health check. HTTP2 health checks
        monitor instances in a load balancer controlled by a target pool. All
        arguments to the command are optional except for the name of the health
        check. For more information on load balancing, see
        [](https://cloud.google.com/compute/docs/load-balancing-and-autoscaling/)
        """,
}
