#!/usr/bin/env python
# Copyright (c) 2019, Red Hat, 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.

from __future__ import absolute_import
import importlib
import sys

import grpc

from ember_csi import config


def main():
    conf = config.CONF
    conf.validate()

    prefix = 'ember_csi.v%s.csi_pb2' % conf.CSI_SPEC.replace('.', '_')
    pb2 = importlib.import_module(prefix)
    pb2_grpc = importlib.import_module(prefix + '_grpc')

    try:
        with grpc.insecure_channel(conf.ENDPOINT) as channel:
            stub = pb2_grpc.IdentityStub(channel)
            response = stub.Probe(pb2.ProbeRequest())
    except grpc.RpcError as exc:
        sys.stderr.write('Error calling CSI Probe: %s\n' % exc)
        sys.exit(2)

    if conf.CSI_SPEC != '0.2.0' and not response.ready.value:
        sys.stderr.write('CSI Probe reports not ready')
        sys.exit(1)

    sys.stdout.write('CSI Probe reports ready')


if __name__ == '__main__':
    main()
