//"g++"  "main.cpp" -o "main" -lb2 -ljsoncpp
#include <sstream>
#include <string>
#include <iostream>
#include <ctime>
#include <blake2.h>//libb2-dev
#include <jsoncpp/json/json.h>//libjsoncpp-dev
#include <iomanip>

char TOPSECRET[] = "TOPSECRET";
long dateCounter = 0;

std::string gameKey(long id2=-1){

  long long id = std::time(0)*1000+dateCounter;
  if(id2!=-1){
    id = id2;
  }
  dateCounter++;

  std::stringstream inStream;
  inStream << id << "|keys|" << TOPSECRET;
  const std::string inString = inStream.str();
  const char* in = inString.c_str();

  size_t outlen=64;
  uint8_t* out = new uint8_t[outlen];
  char key[] = "";
  blake2b(out,in,&key,outlen,inString.length(),0);

  std::stringstream a,b,c,d;
  for(int i=0;i<16;i++){
    a << std::setfill('0') << std::setw(2) << std::hex << static_cast<unsigned>(out[i]);
  }
  for(int i=16;i<16*2;i++){
    b << std::setfill('0') << std::setw(2) << std::hex << static_cast<unsigned>(out[i]);
  }
  for(int i=16*2;i<16*3;i++){
    c << std::setfill('0') << std::setw(2) << std::hex << static_cast<unsigned>(out[i]);
  }
  for(int i=16*3;i<16*4;i++){
    d << std::setfill('0') << std::setw(2) << std::hex << static_cast<unsigned>(out[i]);
  }

  Json::Value obj(Json::objectValue);
  obj["id"] = id;

  Json::Value arr(Json::arrayValue);
  arr.append(a.str());
  arr.append(b.str());
  arr.append(c.str());
  arr.append(d.str());
  obj["keys"] = arr;

  Json::Writer* writer = new Json::FastWriter();
  std::string jsonOut = writer->write(obj);

  delete writer;
  //delete in;//WTF segfault
  delete out;

  return jsonOut;
}

int main(){
  std::cout << gameKey();
}

const TOPSECRET = "TOPSECRET", blake = require("blakejs").blake2bHex;
let dateCounter = 0;

function gameKey(checkId){//per key: 34us js VS 10us c++
  let id = checkId || (Date.now()/1000>>0)*1000+(dateCounter++%1000),
    keys = blake(`${id}|keys|${TOPSECRET}`).match(/.{32}/g);
  return {id, keys};
}
console.log(gameKey());