# -*- coding: utf-8 -*- #
# Copyright 2025 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.

"""services mcp enable command."""

from googlecloudsdk.api_lib.services import services_util
from googlecloudsdk.api_lib.services import serviceusage
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.services import common_flags
from googlecloudsdk.core import log
from googlecloudsdk.core import properties
from googlecloudsdk.core.console import console_io

_OP_BASE_CMD = 'gcloud beta services operations '
_OP_WAIT_CMD = _OP_BASE_CMD + 'wait {0}'

_SERVICE = 'services/%s'
_PROJECT_RESOURCE = 'projects/{}'
_FOLDER_RESOURCE = 'folders/{}'
_ORGANIZATION_RESOURCE = 'organizations/{}'
_CONSUMER_POLICY_DEFAULT = '/consumerPolicies/{}'


@base.UniverseCompatible
@base.ReleaseTracks(base.ReleaseTrack.ALPHA, base.ReleaseTrack.BETA)
class Enable(base.SilentCommand):
  """Enable a service for MCP on a project, folder or organization.

  Enable a service for MCP on a project, folder or organization

  ## EXAMPLES

  To enable a service for MCP called `my-service` on the current project, run:

    $ {command} my-service

  To enable a service for MCP called `my-service` on the project
  `my-project`, run:

    $ {command} my-service --project=my-project

  To enable a service for MCP called `my-service` on the folder
  `my-folder, run:

    $ {command} my-service --folder=my-folder

  To enable a service for MCP called `my-service` on the organization
  `my-organization`, run:

    $ {command} my-service --organization=my-organization

  To run the same command asynchronously (non-blocking), run:

    $ {command} my-service --async
  """

  @staticmethod
  def Args(parser):
    """Args is called by calliope to gather arguments for this command.

    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.
    """
    common_flags.service_flag(suffix='to enable MCP').AddToParser(parser)
    common_flags.add_resource_args(parser)
    common_flags.skip_mcp_endpoint_check_flag(parser)

    base.ASYNC_FLAG.AddToParser(parser)

  def Run(self, args):
    """Run 'services mcp enable'.

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

    Returns:
      Updated MCP Policy.
    """
    project = properties.VALUES.core.project.Get(required=True)
    resource_name = _PROJECT_RESOURCE.format(project)
    if args.IsSpecified('project'):
      resource_name = _PROJECT_RESOURCE.format(args.project)
      project = args.project
    if args.IsSpecified('folder'):
      resource_name = _FOLDER_RESOURCE.format(args.folder)
      folder = args.folder
    else:
      folder = None
    if args.IsSpecified('organization'):
      resource_name = _ORGANIZATION_RESOURCE.format(args.organization)
      organization = args.organization
    else:
      organization = None

    # check if sevice has Mcp Config
    service_metadata = serviceusage.GetServiceV2Beta(
        f'{resource_name}/services/{args.service}'
    )
    if not args.skip_mcp_endpoint_check and (
        not service_metadata.service.mcpServer
        or not service_metadata.service.mcpServer.urls
    ):
      log.error(
          f'The service {args.service} does not have MCP endpoint.'
      )
      return

    if not service_metadata.state.enableRules:
      enable_msg = serviceusage.GetMcpEnabledError(resource_name)
      do_enable = console_io.PromptContinue(
          enable_msg,
          default=False,
          throw_if_unattended=True,
      )
      if do_enable:
        enable_service_op, _ = serviceusage.AddEnableRule(
            [args.service],
            project,
            folder=folder,
            organization=organization,
        )

        # The operation should not be None when enable rules are empty,
        # but in case it is, we check it here to avoid error.
        if enable_service_op:
          enable_service_op = services_util.WaitOperation(
              enable_service_op.name, serviceusage.GetOperationV2Beta
          )

          if enable_service_op.error:
            log.error(
                f'Failed to enable the service {args.service} for the resource'
                f' {resource_name}: {enable_service_op.error}'
            )
            return
      else:
        return

    op = serviceusage.AddMcpEnableRule(
        args.service,
        project,
        folder=folder,
        organization=organization,
    )

    if op is None:
      return None

    if args.async_:
      cmd = _OP_WAIT_CMD.format(op.name)
      log.status.Print(
          'Asynchronous operation is in progress... '
          'Use the following command to wait for its '
          f'completion:\n {cmd}'
      )
      return

    op = services_util.WaitOperation(op.name, serviceusage.GetOperationV2Beta)

    if op.error:
      services_util.PrintOperation(op)
    else:
      log.status.Print(
          f'The MCP endpoint for service {args.service} has been enabled for'
          f' the resource {resource_name}.'
      )