# -*- coding: utf-8 -*- #
# Copyright 2017 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.
"""Creates a database for a Cloud SQL instance."""

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

from googlecloudsdk.api_lib.sql import api_util
from googlecloudsdk.api_lib.sql import exceptions
from googlecloudsdk.api_lib.sql import operations
from googlecloudsdk.api_lib.sql import validate
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.sql import flags
from googlecloudsdk.core import log
from googlecloudsdk.core import properties


@base.ReleaseTracks(base.ReleaseTrack.GA, base.ReleaseTrack.BETA,
                    base.ReleaseTrack.ALPHA)
class AddDatabase(base.Command):
  """Creates a database for a Cloud SQL instance."""

  @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.
    """
    flags.AddDatabaseName(parser)
    flags.AddCharset(parser)
    flags.AddCollation(parser)
    flags.AddInstance(parser)
    base.ASYNC_FLAG.AddToParser(parser)

  def Run(self, args):
    """Creates a database for a Cloud SQL instance.

    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.
    """
    client = api_util.SqlClient(api_util.API_VERSION_DEFAULT)
    sql_client = client.sql_client
    sql_messages = client.sql_messages

    validate.ValidateInstanceName(args.instance)
    instance_ref = client.resource_parser.Parse(
        args.instance,
        params={'project': properties.VALUES.core.project.GetOrFail},
        collection='sql.instances')

    new_database = sql_messages.Database(
        project=instance_ref.project,
        instance=instance_ref.instance,
        name=args.database,
        charset=args.charset,
        collation=args.collation)

    # TODO(b/36052521): Move this API call logic per b/35386183.

    result_operation = sql_client.databases.Insert(new_database)

    operation_ref = client.resource_parser.Create(
        'sql.operations',
        operation=result_operation.name,
        project=instance_ref.project)
    if args.async:
      result = sql_client.operations.Get(
          sql_messages.SqlOperationsGetRequest(
              project=operation_ref.project, operation=operation_ref.operation))
    else:
      try:
        operations.OperationsV1Beta4.WaitForOperation(
            sql_client, operation_ref, 'Creating Cloud SQL database')

      except exceptions.OperationError:
        log.Print('Database creation failed. Check if a database named {0} '
                  'already exists.'.format(args.database))
        # Must fail with non-zero exit code on API request failure.
        # TODO(b/36051979): Refactor when b/35156765 is resolved.
        raise
      result = new_database

    log.CreatedResource(args.database, kind='database', is_async=args.async)

    return result
