# Copyright 2016 Google Inc. 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.
"""Command for spanner databases ddl describe."""

from __future__ import absolute_import
from __future__ import unicode_literals
from googlecloudsdk.api_lib.spanner import databases
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.spanner import resource_args


class Describe(base.ListCommand):
  """Describe the DDL for a Cloud Spanner database."""

  @staticmethod
  def Args(parser):
    """See base class."""
    resource_args.AddDatabaseResourceArg(parser, 'of which the ddl to describe')
    parser.display_info.AddCacheUpdater(None)

  def Run(self, args):
    """This is what gets called when the user runs this command.

    Args:
      args: an argparse namespace. All the arguments that were provided to this
        command invocation.

    Returns:
      Some value that we want to have printed later.
    """
    return databases.GetDdl(args.CONCEPTS.database.Parse())
