# Copyright 2014 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.

"""gcloud dns record-sets transaction execute command."""

import os
from googlecloudsdk.api_lib.dns import import_util
from googlecloudsdk.api_lib.dns import transaction_util
from googlecloudsdk.api_lib.dns import util
from googlecloudsdk.calliope import base
from googlecloudsdk.core import log
from googlecloudsdk.core import properties


class Execute(base.ListCommand):
  """Execute the transaction on Cloud DNS.

  This command executes the transaction on Cloud DNS. This will result in
  record-sets being changed as specified in the transaction.
  """

  detailed_help = {
      'DESCRIPTION': '{description}',
      'EXAMPLES': """\
          To execute the transaction, run:

            $ {command} -z MANAGED_ZONE
          """,
  }

  @staticmethod
  def Args(parser):
    util.ZONE_FLAG.AddToParser(parser)

  def Collection(self):
    return 'dns.changes'

  def Format(self, args):
    return self.ListFormat(args)

  @util.HandleHttpError
  def Run(self, args):
    with transaction_util.TransactionFile(args.transaction_file) as trans_file:
      change = transaction_util.ChangeFromYamlFile(trans_file)

    if import_util.IsOnlySOAIncrement(change):
      log.status.Print(
          'Nothing to do, empty transaction [{0}]'.format(
              args.transaction_file))
      os.remove(args.transaction_file)
      return None

    dns = self.context['dns_client']
    messages = self.context['dns_messages']
    resources = self.context['dns_resources']
    project_id = properties.VALUES.core.project.Get(required=True)
    zone_ref = resources.Parse(args.zone, collection='dns.managedZones')

    # Send the change to the service.
    result = dns.changes.Create(messages.DnsChangesCreateRequest(
        change=change, managedZone=zone_ref.Name(), project=project_id))
    change_ref = resources.Create(
        collection='dns.changes', project=project_id,
        managedZone=zone_ref.Name(), changeId=result.id)
    msg = 'Executed transaction [{0}] for managed-zone [{1}].'.format(
        args.transaction_file, zone_ref.Name())
    log.status.Print(msg)
    log.CreatedResource(change_ref)
    os.remove(args.transaction_file)
    return result
