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# Licensed under the Apache License, Version 2.0 (the "License");
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#
#    http://www.apache.org/licenses/LICENSE-2.0
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"""Command to get information about a principal's permissions on a service."""

from __future__ import absolute_import
from __future__ import division
from __future__ import unicode_literals
from googlecloudsdk.api_lib.endpoints import services_util
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.endpoints import arg_parsers
from googlecloudsdk.command_lib.endpoints import common_flags


class CheckIamPolicy(base.Command):
  """Returns information about a member's permissions on a service.

  This command lists the permissions that the current authenticated
  gcloud user has for a service. For example, if the authenticated user is
  able to delete the service, `servicemanagement.services.delete` will
  be among the returned permissions.

  ## EXAMPLES

  To check the permissions for the currently authenticated gcloud, run:

    $ {command} my_produced_service_name
  """

  @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.
    """
    service_flag = common_flags.producer_service_flag(
        suffix='for which to check the IAM policy')
    service_flag.AddToParser(parser)

  def Run(self, args):
    """Run 'service-management check-access'.

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

    Returns:
      The response from the access API call.
    """
    messages = services_util.GetMessagesModule()
    client = services_util.GetClientInstance()
    all_iam_permissions = services_util.ALL_IAM_PERMISSIONS

    # Shorten the query request name for better readability
    query_request = messages.ServicemanagementServicesTestIamPermissionsRequest

    service = arg_parsers.GetServiceNameFromArg(args.service)

    request = query_request(
        servicesId=service,
        testIamPermissionsRequest=messages.TestIamPermissionsRequest(
            permissions=all_iam_permissions))

    return client.services.TestIamPermissions(request)
