# Copyright 2019 The gRPC Authors.
#
# 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.

import asyncio
import logging
import unittest

from grpc.experimental import aio
from src.proto.grpc.testing import messages_pb2
from src.proto.grpc.testing import benchmark_service_pb2_grpc


class BenchmarkServer(benchmark_service_pb2_grpc.BenchmarkServiceServicer):

    async def UnaryCall(self, request, context):
        payload = messages_pb2.Payload(body=b'\0' * request.response_size)
        return messages_pb2.SimpleResponse(payload=payload)

    async def StreamingFromServer(self, request, context):
        payload = messages_pb2.Payload(body=b'\0' * request.response_size)
        # Sends response at full capacity!
        while True:
            yield messages_pb2.SimpleResponse(payload=payload)


async def _start_async_server():
    server = aio.server()

    port = server.add_insecure_port('localhost:%s' % 50051)
    servicer = BenchmarkServer()
    benchmark_service_pb2_grpc.add_BenchmarkServiceServicer_to_server(
        servicer, server)

    await server.start()
    logging.info('Benchmark server started at :%d' % port)
    await server.wait_for_termination()


def main():
    aio.init_grpc_aio()
    loop = asyncio.get_event_loop()
    loop.create_task(_start_async_server())
    loop.run_forever()


if __name__ == '__main__':
    logging.basicConfig(level=logging.DEBUG)
    main()
