# 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.

"""List regions available to Google Cloud Functions."""

from __future__ import absolute_import
from __future__ import unicode_literals
from apitools.base.py import exceptions as api_exceptions
from apitools.base.py import list_pager

from googlecloudsdk.api_lib.functions import util
from googlecloudsdk.calliope import base
from googlecloudsdk.calliope import exceptions as base_exceptions
from googlecloudsdk.command_lib.functions import flags
from googlecloudsdk.core import exceptions
from googlecloudsdk.core import properties


class List(base.ListCommand):
  """List regions available to Google Cloud Functions."""

  @staticmethod
  def Args(parser):
    parser.display_info.AddFormat('table(name)')
    parser.display_info.AddUriFunc(flags.GetLocationsUri)

  def Run(self, args):
    client = util.GetApiClientInstance()
    list_generator = list_pager.YieldFromList(
        service=client.projects_locations,
        request=self._BuildRequest(),
        field='locations', batch_size_attribute='pageSize')
    try:
      for item in list_generator:
        yield item
    except api_exceptions.HttpError as error:
      msg = util.GetHttpErrorMessage(error)
      exceptions.reraise(base_exceptions.HttpException(msg))

  def _BuildRequest(self):
    messages = util.GetApiMessagesModule()
    project = properties.VALUES.core.project.GetOrFail()
    return messages.CloudfunctionsProjectsLocationsListRequest(
        name='projects/' + project,
    )
