#ifndef CJS_PROC_UUID
#define CJS_PROC_UUID

#include <random>
#include <sstream>

namespace cjs {
    namespace uuid {
        static std::random_device rd;
        static std::mt19937 gen(rd());
        static std::uniform_int_distribution<> dis(0, 15);
        static std::uniform_int_distribution<> dis2(8, 11);

        std::string v4() {
            std::stringstream ss;
            int i;
            ss << std::hex;
            for (i = 0; i < 8; i++) {
                ss << dis(gen);
            }
            ss << "-";
            for (i = 0; i < 4; i++) {
                ss << dis(gen);
            }
            ss << "-4";
            for (i = 0; i < 3; i++) {
                ss << dis(gen);
            }
            ss << "-";
            ss << dis2(gen);
            for (i = 0; i < 3; i++) {
                ss << dis(gen);
            }
            ss << "-";
            for (i = 0; i < 12; i++) {
                ss << dis(gen);
            };
            return ss.str();
        }
    }
}
// https://stackoverflow.com/questions/24365331/how-can-i-generate-uuid-in-c-without-using-boost-library

#endif // CJS_PROC_UUID