# -*- coding: utf-8 -*- #
# Copyright 2022 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,
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"""Command to create a database migration private connection."""

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

from googlecloudsdk.api_lib.database_migration import api_util
from googlecloudsdk.api_lib.database_migration import private_connections
from googlecloudsdk.api_lib.database_migration import resource_args
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.database_migration import flags
from googlecloudsdk.command_lib.database_migration.private_connections import flags as pc_flags
from googlecloudsdk.command_lib.util.concepts import concept_parsers
from googlecloudsdk.command_lib.util.concepts import presentation_specs
from googlecloudsdk.core import log

DESCRIPTION = 'Create a Database Migration private connection'
EXAMPLES = """\
    To create a private connection with VPC Peering called 'my-private-connection', run:

        $ {command} my-private-connection --region=us-central1 --display-name=my-private-connection --vpc=vpc-example --subnet=10.0.0.0/29

        To create a private connection with PSC Interface called 'my-privateConnection', run:

        $ {command} my-private-connection --location=us-central1 --display-name=my-private-connection --network-attachment=network-attachment-example

        To use a private connection, all migrations and connection profiles that use this configuration must be in the same region.


   """


@base.ReleaseTracks(base.ReleaseTrack.GA)
@base.UniverseCompatible
class Create(base.Command):
  """Create a Database Migration private connection."""
  detailed_help = {'DESCRIPTION': DESCRIPTION, 'EXAMPLES': EXAMPLES}

  @staticmethod
  def CommonArgs(parser, release_track):
    """Common arguments for all release tracks.

    Args:
      parser: An argparse parser that you can use to add arguments that go on
        the command line after this command. Positional arguments are allowed.
      release_track: Some arguments are added based on the command release
        track.
    """
    resource_args.AddPrivateConnectionResourceArg(parser, 'to create')

    pc_flags.AddDisplayNameFlag(parser)
    pc_flags.AddNoAsyncFlag(parser)
    pc_flags.AddSkipValidationFlag(parser)
    pc_flags.AddValidateOnlyFlag(parser)
    flags.AddLabelsCreateFlags(parser)

    config_group = parser.add_group(mutex=True, required=True)

    vpc_peering_group = config_group.add_group(
        help='Arguments for VPC Peering configuration.'
    )
    vpc_peering_group.add_argument(
        '--subnet',
        help="""A free subnet for peering. (CIDR of /29).""",
        required=True,
    )

    # Add VPC resource arg inside the VPC Peering group
    vpc_spec = presentation_specs.ResourcePresentationSpec(
        '--vpc',
        resource_args.GetVpcResourceSpec(),
        'Resource ID of the VPC network to peer with.',
        group=vpc_peering_group,
        required=True,
    )  # Ensure VPC is required within this group
    concept_parsers.ConceptParser([vpc_spec]).AddToParser(vpc_peering_group)

    # --- PSC Interface Group ---
    psc_group = config_group.add_group(
        help='Arguments for Private Service Connect Interface configuration.'
    )
    pc_flags.AddNetworkAttachmentFlag(psc_group)

  @staticmethod
  def Args(parser):
    """Args is called by calliope to gather arguments for this command."""
    Create.CommonArgs(parser, base.ReleaseTrack.GA)

  def Run(self, args):
    """Create a Database Migration private connection.

    Args:
      args: argparse.Namespace, The arguments that this command was invoked
        with.

    Returns:
      A dict object representing the operations resource describing the create
      operation if the create was successful.
    """
    private_connection_ref = args.CONCEPTS.private_connection.Parse()
    parent_ref = private_connection_ref.Parent().RelativeName()

    pc_client = private_connections.PrivateConnectionsClient(
        release_track=self.ReleaseTrack())
    result_operation = pc_client.Create(
        parent_ref, private_connection_ref.privateConnectionsId, args)

    client = api_util.GetClientInstance(self.ReleaseTrack())
    messages = api_util.GetMessagesModule(self.ReleaseTrack())
    resource_parser = api_util.GetResourceParser(self.ReleaseTrack())

    if args.IsKnownAndSpecified('no_async'):
      log.status.Print(
          'Waiting for private connection [{}] to be created with [{}]'.format(
              private_connection_ref.privateConnectionsId,
              result_operation.name))

      api_util.HandleLRO(client, result_operation,
                         client.projects_locations_privateConnections)

      log.status.Print('Created private connection {} [{}]'.format(
          private_connection_ref.privateConnectionsId, result_operation.name))
      return

    operation_ref = resource_parser.Create(
        'datamigration.projects.locations.operations',
        operationsId=result_operation.name,
        projectsId=private_connection_ref.projectsId,
        locationsId=private_connection_ref.locationsId)

    return client.projects_locations_operations.Get(
        messages.DatamigrationProjectsLocationsOperationsGetRequest(
            name=operation_ref.operationsId))