/*
 *
 * Copyright 2015, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <gflags/gflags.h>
#include <grpc/support/log.h>

#include "test/cpp/qps/driver.h"
#include "test/cpp/qps/stats.h"

DEFINE_int32(num_clients, 1, "Number of client binaries");
DEFINE_int32(num_servers, 1, "Number of server binaries");

DEFINE_int32(warmup_seconds, 5, "Warmup time (in seconds)");
DEFINE_int32(benchmark_seconds, 30, "Benchmark time (in seconds)");

// Common config
DEFINE_bool(enable_ssl, false, "Use SSL");
DEFINE_string(rpc_type, "UNARY", "Type of RPC: UNARY or STREAMING");

// Server config
DEFINE_int32(server_threads, 1, "Number of server threads");
DEFINE_string(server_type, "SYNCHRONOUS_SERVER", "Server type");

// Client config
DEFINE_int32(outstanding_rpcs_per_channel, 1,
             "Number of outstanding rpcs per channel");
DEFINE_int32(client_channels, 1, "Number of client channels");
DEFINE_int32(payload_size, 1, "Payload size");
DEFINE_string(client_type, "SYNCHRONOUS_CLIENT", "Client type");
DEFINE_int32(async_client_threads, 1, "Async client threads");

using grpc::testing::ClientConfig;
using grpc::testing::ServerConfig;
using grpc::testing::ClientType;
using grpc::testing::ServerType;
using grpc::testing::RpcType;
using grpc::testing::ResourceUsage;
using grpc::testing::sum;

// In some distros, gflags is in the namespace google, and in some others,
// in gflags. This hack is enabling us to find both.
namespace google {}
namespace gflags {}
using namespace google;
using namespace gflags;

int main(int argc, char** argv) {
  grpc_init();
  ParseCommandLineFlags(&argc, &argv, true);

  RpcType rpc_type;
  GPR_ASSERT(RpcType_Parse(FLAGS_rpc_type, &rpc_type));

  ClientType client_type;
  ServerType server_type;
  GPR_ASSERT(ClientType_Parse(FLAGS_client_type, &client_type));
  GPR_ASSERT(ServerType_Parse(FLAGS_server_type, &server_type));

  ClientConfig client_config;
  client_config.set_client_type(client_type);
  client_config.set_enable_ssl(FLAGS_enable_ssl);
  client_config.set_outstanding_rpcs_per_channel(
      FLAGS_outstanding_rpcs_per_channel);
  client_config.set_client_channels(FLAGS_client_channels);
  client_config.set_payload_size(FLAGS_payload_size);
  client_config.set_async_client_threads(FLAGS_async_client_threads);
  client_config.set_rpc_type(rpc_type);

  ServerConfig server_config;
  server_config.set_server_type(server_type);
  server_config.set_threads(FLAGS_server_threads);
  server_config.set_enable_ssl(FLAGS_enable_ssl);

  auto result = RunScenario(client_config, FLAGS_num_clients,
                            server_config, FLAGS_num_servers,
                            FLAGS_warmup_seconds, FLAGS_benchmark_seconds);

  gpr_log(GPR_INFO, "QPS: %.1f",
          result.latencies.Count() /
              average(result.client_resources,
                      [](ResourceUsage u) { return u.wall_time; }));

  gpr_log(GPR_INFO, "Latencies (50/95/99/99.9%%-ile): %.1f/%.1f/%.1f/%.1f us",
          result.latencies.Percentile(50) / 1000,
          result.latencies.Percentile(95) / 1000,
          result.latencies.Percentile(99) / 1000,
          result.latencies.Percentile(99.9) / 1000);

  gpr_log(GPR_INFO, "Server system time: %.2f%%",
          100.0 * sum(result.server_resources,
                      [](ResourceUsage u) { return u.system_time; }) /
              sum(result.server_resources,
                  [](ResourceUsage u) { return u.wall_time; }));
  gpr_log(GPR_INFO, "Server user time:   %.2f%%",
          100.0 * sum(result.server_resources,
                      [](ResourceUsage u) { return u.user_time; }) /
              sum(result.server_resources,
                  [](ResourceUsage u) { return u.wall_time; }));
  gpr_log(GPR_INFO, "Client system time: %.2f%%",
          100.0 * sum(result.client_resources,
                      [](ResourceUsage u) { return u.system_time; }) /
              sum(result.client_resources,
                  [](ResourceUsage u) { return u.wall_time; }));
  gpr_log(GPR_INFO, "Client user time:   %.2f%%",
          100.0 * sum(result.client_resources,
                      [](ResourceUsage u) { return u.user_time; }) /
              sum(result.client_resources,
                  [](ResourceUsage u) { return u.wall_time; }));

  grpc_shutdown();
  return 0;
}