# -*- coding: utf-8 -*- #
# Copyright 2024 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.
"""Describes a Gcloud Deploy Policy resource."""


from apitools.base.py import encoding
from googlecloudsdk.api_lib.util import exceptions as gcloud_exception
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.deploy import deploy_policy_util
from googlecloudsdk.command_lib.deploy import exceptions as deploy_exceptions
from googlecloudsdk.command_lib.deploy import manifest_util
from googlecloudsdk.command_lib.deploy import resource_args

_DETAILED_HELP = {
    'DESCRIPTION': '{description}',
    'EXAMPLES': """ \
  To describe a deploy policy called 'test-policy' in region 'us-central1', run:

     $ {command} test-policy --region=us-central1

""",
}


def _CommonArgs(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.
  """
  resource_args.AddDeployPolicyResourceArg(parser, positional=True)


@base.ReleaseTracks(
    base.ReleaseTrack.ALPHA, base.ReleaseTrack.BETA, base.ReleaseTrack.GA
)
@base.DefaultUniverseOnly
class Describe(base.DescribeCommand):
  """Show details about a deploy policy."""

  detailed_help = _DETAILED_HELP

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

  @gcloud_exception.CatchHTTPErrorRaiseHTTPException(
      deploy_exceptions.HTTP_ERROR_FORMAT
  )
  def Run(self, args):
    """This is what gets called when the user runs this command."""
    policy_ref = args.CONCEPTS.deploy_policy.Parse()
    # Check if the policy exists.
    policy_obj = deploy_policy_util.GetDeployPolicy(policy_ref)
    manifest = encoding.MessageToDict(policy_obj)
    manifest_util.ApplyTransforms(
        manifest,
        _TRANSFORMS,
        manifest_util.ResourceKind.DEPLOY_POLICY,
        policy_ref.Name(),
        policy_ref.projectsId,
        policy_ref.locationsId,
    )
    return manifest

# We can't use manifest_util._EXPORT_TRANSFORMS because it has several
# transforms we don't want for `describe`. Specifically:
# * it adds `apiVersion`/`kind`
# * it moves a bunch of fields into `metadata`, and turns the `name` into an id
# * it removes fields like `createTime`/`updateTime`
_TRANSFORMS = [
    manifest_util.TransformConfig(
        kinds=[manifest_util.ResourceKind.DEPLOY_POLICY],
        # Using the always-present `name` field to make sure this transform is
        # always applied.
        fields=['name'],
        move=manifest_util.AddApiVersionAndKind,
    ),
    manifest_util.TransformConfig(
        kinds=[manifest_util.ResourceKind.DEPLOY_POLICY],
        fields=['rules[].rolloutRestriction.timeWindows.oneTimeWindows[]'],
        replace=manifest_util.ConvertPolicyOneTimeWindowToYamlFormat,
    ),
    manifest_util.TransformConfig(
        kinds=[manifest_util.ResourceKind.DEPLOY_POLICY],
        fields=[
            'rules[].rolloutRestriction.timeWindows.weeklyWindows[].startTime',
            'rules[].rolloutRestriction.timeWindows.weeklyWindows[].endTime',
        ],
        replace=manifest_util.ConvertTimeProtoToString,
    ),
]