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#include <iostream>
#include <memory>
#include <string>
#include <cfloat>

#include <grpc/grpc.h>
#include <grpc++/channel_arguments.h>
#include <grpc++/channel_interface.h>
#include <grpc++/client_context.h>
#include <grpc++/create_channel.h>
#include <grpc++/credentials.h>
#include <grpc++/status.h>
#include "test/cpp/qps/perf_db.grpc.pb.h"


namespace grpc{
namespace testing {

//Manages data sending to performance database server
class PerfDbClient {
public:
  PerfDbClient() {
    QPS_ = DBL_MIN;
    QPSPerCore_ = DBL_MIN;
    percentileLatency50_ = DBL_MIN;
    percentileLatency90_ = DBL_MIN;
    percentileLatency95_ = DBL_MIN;
    percentileLatency99_ = DBL_MIN;
    percentileLatency99Point9_ = DBL_MIN;
    serverSystemTime_ = DBL_MIN;
    serverUserTime_ = DBL_MIN;
    clientSystemTime_ = DBL_MIN;
    clientUserTime_ = DBL_MIN;
  }
  
  void init(std::shared_ptr<ChannelInterface> channel) { stub_ = PerfDbTransfer::NewStub(channel); }

  ~PerfDbClient() {}

  //sets the client and server config information
  void setConfigs(const ClientConfig& clientConfig, const ServerConfig& serverConfig);
  
  //sets the QPS
  void setQPS(double QPS);

  //sets the QPS per core
  void setQPSPerCore(double QPSPerCore);

  //sets the 50th, 90th, 95th, 99th and 99.9th percentile latency
  void setLatencies(double percentileLatency50, double percentileLatency90,
     double percentileLatency95, double percentileLatency99, double percentileLatency99Point9);

  //sets the server and client, user and system times
  void setTimes(double serverSystemTime, double serverUserTime, 
    double clientSystemTime, double clientUserTime);

  //sends the data to the performancew database server
  int sendData(std::string access_token, std::string test_name, std::string sys_info);

private:
  std::unique_ptr<PerfDbTransfer::Stub> stub_;
  ClientConfig clientConfig_;
  ServerConfig serverConfig_;
  double QPS_;
  double QPSPerCore_;
  double percentileLatency50_;
  double percentileLatency90_;
  double percentileLatency95_;
  double percentileLatency99_;
  double percentileLatency99Point9_;
  double serverSystemTime_;
  double serverUserTime_;
  double clientSystemTime_;
  double clientUserTime_;
};

} //namespace testing
} //namespace grpc