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#include <chrono>
#include <memory>
#include <string>

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

#include "test/cpp/rpcmanager/grpc_rpc_manager_test.h"
#include "test/cpp/util/test_config.h"

using grpc::testing::GrpcRpcManagerTest;

static const int kMinPollers = 2;
static const int kMaxPollers = 10;

static const int kPollingTimeoutMsec = 10;
static const int kDoWorkDurationMsec = 1;

static const int kNumDoWorkIterations = 10;

grpc::GrpcRpcManager::WorkStatus GrpcRpcManagerTest::PollForWork(void **tag,
                                                                 bool *ok) {
  {
    std::unique_lock<grpc::mutex> lock(mu_);
    gpr_log(GPR_INFO, "PollForWork: Entered");
  }

  WorkStatus work_status = WORK_FOUND;
  *tag = nullptr;
  *ok = true;

  // Simulate "polling for work" by sleeping for sometime
  std::this_thread::sleep_for(std::chrono::milliseconds(kPollingTimeoutMsec));

  {
    std::unique_lock<grpc::mutex> lock(mu_);
    num_calls_++;
    if (num_calls_ > kNumDoWorkIterations) {
      gpr_log(GPR_DEBUG, "PollForWork: Returning shutdown");
      work_status = SHUTDOWN;
      ShutdownRpcManager();
    }
  }

  return work_status;
}

void GrpcRpcManagerTest::DoWork(void *tag, bool ok) {
  {
    std::unique_lock<grpc::mutex> lock(mu_);
    gpr_log(GPR_DEBUG, "DoWork()");
  }

  // Simulate "doing work" by sleeping
  std::this_thread::sleep_for(std::chrono::milliseconds(kDoWorkDurationMsec));
}

int main(int argc, char **argv) {
  grpc::testing::InitTest(&argc, &argv, true);
  GrpcRpcManagerTest test_rpc_manager(kMinPollers, kMaxPollers);
  test_rpc_manager.Initialize();
  test_rpc_manager.Wait();

  return 0;
}