# -*- coding: utf-8 -*- #
# Copyright 2020 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 to create migration jobs for a database migration."""

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


from googlecloudsdk.api_lib.database_migration import api_util
from googlecloudsdk.api_lib.database_migration import migration_jobs
from googlecloudsdk.api_lib.database_migration import resource_args
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.database_migration import flags
from googlecloudsdk.command_lib.database_migration.migration_jobs import flags as mj_flags

DETAILED_HELP = {
    'DESCRIPTION':
        'Create a Database Migration Service migration job.',
    'EXAMPLES':
        """\
        To create a migration job with vpc peering connectivity:

            $ {command} MIGRATION_JOB --region=us-central1 --display-name=my-job  --source=cp1 --destination=cp2 --peer-vpc=network1

        """,
}


@base.ReleaseTracks(base.ReleaseTrack.ALPHA)
class MySQL(base.Command):
  """Create a Database Migration Service migration job."""

  detailed_help = DETAILED_HELP

  @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.
    """
    resource_args.AddMigrationJobResourceArgs(
        parser, 'to create', required=True)
    mj_flags.AddDisplayNameFlag(parser)
    mj_flags.AddTypeFlag(parser, required=True)
    mj_flags.AddDumpPathFlag(parser)
    mj_flags.AddConnectivityGroupFlag(parser, required=True)
    flags.AddLabelsCreateFlags(parser)

  def Run(self, args):
    """Create a Database Migration Service migration job.

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

    Returns:
      A dict object representing the operations resource describing the create
      operation if the create was successful.
    """
    migration_job_ref = args.CONCEPTS.migration_job.Parse()
    parent_ref = migration_job_ref.Parent().RelativeName()

    source_ref = args.CONCEPTS.source.Parse()
    destination_ref = args.CONCEPTS.destination.Parse()

    cp_client = migration_jobs.MigrationJobsClient()
    result_operation = cp_client.Create(
        parent_ref,
        migration_job_ref.migrationJobsId,
        source_ref,
        destination_ref,
        args)

    client = api_util.GetClientInstance()
    messages = api_util.GetMessagesModule()
    resource_parser = api_util.GetResourceParser()

    operation_ref = resource_parser.Create(
        'datamigration.projects.locations.operations',
        operationsId=result_operation.name,
        projectsId=migration_job_ref.projectsId,
        locationsId=migration_job_ref.locationsId)

    return client.projects_locations_operations.Get(
        messages.DatamigrationProjectsLocationsOperationsGetRequest(
            name=operation_ref.operationsId))