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"""The Python implementation of the GRPC interoperability test server."""

import argparse
from concurrent import futures
import logging
import time

import grpc
from src.proto.grpc.testing import test_pb2

from tests.interop import methods
from tests.interop import resources

_ONE_DAY_IN_SECONDS = 60 * 60 * 24


def serve():
  parser = argparse.ArgumentParser()
  parser.add_argument(
      '--port', help='the port on which to serve', type=int)
  parser.add_argument(
      '--use_tls', help='require a secure connection',
      default=False, type=resources.parse_bool)
  args = parser.parse_args()

  server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
  test_pb2.add_TestServiceServicer_to_server(methods.TestService(), server)
  if args.use_tls:
    private_key = resources.private_key()
    certificate_chain = resources.certificate_chain()
    credentials = grpc.ssl_server_credentials(
        ((private_key, certificate_chain),))
    server.add_secure_port('[::]:{}'.format(args.port), credentials)
  else:
    server.add_insecure_port('[::]:{}'.format(args.port))

  server.start()
  logging.info('Server serving.')
  try:
    while True:
      time.sleep(_ONE_DAY_IN_SECONDS)
  except BaseException as e:
    logging.info('Caught exception "%s"; stopping server...', e)
    server.stop(None)
    logging.info('Server stopped; exiting.')

if __name__ == '__main__':
  serve()