# -*- coding: utf-8 -*- #
# Copyright 2017 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.
"""Command for obtaining details about revisions."""

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

from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.run import connection_context
from googlecloudsdk.command_lib.run import exceptions
from googlecloudsdk.command_lib.run import flags
from googlecloudsdk.command_lib.run import resource_args
from googlecloudsdk.command_lib.run import serverless_operations
from googlecloudsdk.command_lib.run.printers import export_printer
from googlecloudsdk.command_lib.run.printers import revision_printer
from googlecloudsdk.command_lib.util.concepts import concept_parsers
from googlecloudsdk.command_lib.util.concepts import presentation_specs
from googlecloudsdk.core.resource import resource_printer


@base.UniverseCompatible
class Describe(base.DescribeCommand):
  """Obtain details about revisions."""

  detailed_help = {
      'DESCRIPTION': """\
          {description}
          """,
      'EXAMPLES': """\
          To describe a revision `my-service-00001-abc`in us-central1:

              $ {command} --region=us-central1 my-service-00001-abc
          """,
  }

  @staticmethod
  def CommonArgs(parser):
    revision_presentation = presentation_specs.ResourcePresentationSpec(
        'REVISION',
        resource_args.GetRevisionResourceSpec(),
        'Revision to describe.',
        required=True,
        prefixes=False)
    concept_parsers.ConceptParser([
        revision_presentation]).AddToParser(parser)

    resource_printer.RegisterFormatter(
        revision_printer.REVISION_PRINTER_FORMAT,
        revision_printer.RevisionPrinter, hidden=True)
    parser.display_info.AddFormat(revision_printer.REVISION_PRINTER_FORMAT)
    resource_printer.RegisterFormatter(
        export_printer.EXPORT_PRINTER_FORMAT,
        export_printer.ExportPrinter, hidden=True)

  @staticmethod
  def Args(parser):
    Describe.CommonArgs(parser)

  def Run(self, args):
    """Show details about a revision."""
    conn_context = connection_context.GetConnectionContext(
        args, flags.Product.RUN, self.ReleaseTrack())
    revision_ref = args.CONCEPTS.revision.Parse()

    with serverless_operations.Connect(conn_context) as client:
      wrapped_revision = client.GetRevision(revision_ref)

    # If the revision is a worker pool revision, we should not show it.
    if not wrapped_revision or wrapped_revision.worker_pool_name is not None:
      raise exceptions.ArgumentError('Cannot find revision [{}]'.format(
          revision_ref.revisionsId))
    return wrapped_revision
