# -*- coding: utf-8 -*- #
# Copyright 2021 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.
"""Creates a new AlloyDB backup."""


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

from googlecloudsdk.api_lib.alloydb import api_util
from googlecloudsdk.api_lib.alloydb import backup_operations
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.alloydb import flags
from googlecloudsdk.command_lib.kms import resource_args as kms_resource_args
from googlecloudsdk.core import log
from googlecloudsdk.core import properties
from googlecloudsdk.core import resources


def _ParseBackupType(alloydb_messages, backup_type):
  if backup_type:
    return alloydb_messages.Backup.TypeValueValuesEnum.lookup_by_name(
        backup_type.upper())
  return None


# TODO: b/312466999 - Change @base.DefaultUniverseOnly to
# @base.UniverseCompatible once b/312466999 is fixed.
# See go/gcloud-cli-running-tpc-tests.
@base.DefaultUniverseOnly
@base.ReleaseTracks(base.ReleaseTrack.GA)
class Create(base.CreateCommand):
  """Creates a new AlloyDB backup within a given project."""

  detailed_help = {
      'DESCRIPTION': '{description}',
      'EXAMPLES': """\
        To create a new backup, run:

          $ {command} my-backup --cluster=my-cluster --region=us-central1

        To create a new cross-region backup, run:

          $ {command} projects/my-project/locations/us-west1/backups/my-backup --cluster=my-cluster --region=us-central1
        """,
  }

  @classmethod
  def Args(cls, parser):
    """Specifies additional command flags.

    Args:
      parser: argparse.Parser: Parser object for command line inputs.
    """
    base.ASYNC_FLAG.AddToParser(parser)
    parser.add_argument(
        '--region',
        required=True,
        type=str,
        help='The region of the cluster to backup.',
    )
    parser.add_argument(
        'backup',
        type=str,
        help=(
            'The AlloyDB backup to create. This must either be the backup ID'
            ' (myBackup) or the full backup path'
            ' (projects/myProject/locations/us-central1/backups/myBackup). In'
            ' the first case, the project and location are assumed to be the'
            ' same as the cluster being backed up. The second form can be'
            ' used to create cross-region and cross-project backups.'
        ),
    )
    flags.AddCluster(parser, False)
    flags.AddTags(parser)
    kms_resource_args.AddKmsKeyResourceArg(
        parser,
        'backup',
        permission_info=(
            "The 'AlloyDB Service Agent' service account must hold permission"
            " 'Cloud KMS CryptoKey Encrypter/Decrypter'"
        ),
    )

  def ConstructResourceFromArgs(
      self, alloydb_messages, cluster_ref, backup_ref, args
  ):
    backup_resource = alloydb_messages.Backup()
    backup_resource.name = backup_ref.RelativeName()
    backup_resource.type = _ParseBackupType(alloydb_messages, 'ON_DEMAND')
    backup_resource.clusterName = cluster_ref.RelativeName()
    backup_resource.tags = flags.GetTagsFromArgs(
        args, alloydb_messages.Backup.TagsValue)
    kms_key = flags.GetAndValidateKmsKeyName(args)
    if kms_key:
      encryption_config = alloydb_messages.EncryptionConfig()
      encryption_config.kmsKeyName = kms_key
      backup_resource.encryptionConfig = encryption_config
    return backup_resource

  def Run(self, args):
    """Constructs and sends request.

    Args:
      args: argparse.Namespace, An object that contains the values for the
          arguments specified in the .Args() method.

    Returns:
      ProcessHttpResponse of the request made.
    """
    client = api_util.AlloyDBClient(self.ReleaseTrack())
    alloydb_client = client.alloydb_client
    alloydb_messages = client.alloydb_messages
    cluster_ref = client.resource_parser.Create(
        'alloydb.projects.locations.clusters',
        projectsId=properties.VALUES.core.project.GetOrFail,
        locationsId=args.region,
        clustersId=args.cluster)
    backup_ref = client.resource_parser.Parse(
        collection='alloydb.projects.locations.backups',
        line=args.backup,
        params={
            'projectsId': properties.VALUES.core.project.GetOrFail,
            'locationsId': args.region,
        },
    )

    backup_resource = self.ConstructResourceFromArgs(
        alloydb_messages, cluster_ref, backup_ref, args
    )

    req = alloydb_messages.AlloydbProjectsLocationsBackupsCreateRequest(
        backup=backup_resource,
        backupId=backup_ref.Name(),
        parent=backup_ref.Parent().RelativeName(),
    )
    op = alloydb_client.projects_locations_backups.Create(req)
    op_ref = resources.REGISTRY.ParseRelativeName(
        op.name, collection='alloydb.projects.locations.operations')
    log.status.Print('Operation ID: {}'.format(op_ref.Name()))
    if not args.async_:
      backup_operations.Await(op_ref, 'Creating backup', self.ReleaseTrack())
    return op


@base.ReleaseTracks(base.ReleaseTrack.BETA)
class CreateBeta(Create):
  """Create a new AlloyDB backup within a given project."""

  @classmethod
  def Args(cls, parser):
    super(CreateBeta, cls).Args(parser)
    flags.AddEnforcedRetention(parser)

  def ConstructResourceFromArgs(
      self, alloydb_messages, cluster_ref, backup_ref, args
  ):
    backup_resource = super(CreateBeta, self).ConstructResourceFromArgs(
        alloydb_messages, cluster_ref, backup_ref, args
    )
    if args.enforced_retention:
      backup_resource.enforcedRetention = True
    return backup_resource


@base.ReleaseTracks(base.ReleaseTrack.ALPHA)
class CreateAlpha(CreateBeta):
  """Create a new AlloyDB backup within a given project."""

  @classmethod
  def Args(cls, parser):
    super(CreateAlpha, cls).Args(parser)