#include "Utils/Snowflake.hpp"

namespace Chattr {

Snowflake GenerateID() {
    static struct _EPOCH {
        _EPOCH() {
            EPOCH = std::chrono::system_clock::now();
        }
        std::chrono::system_clock::time_point EPOCH;
    } __EPOCH__;
    
    static std::mutex snowflakeGenerateMutex_;

    std::lock_guard<std::mutex> lock(snowflakeGenerateMutex_);
#ifdef _WIN32
    DWORD tid = GetCurrentThreadId();
#elif __linux__
    pthread_t tid = pthread_self();
#endif
    static int sequence = 0;
    Snowflake id = {};

    auto timestamp = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now() - __EPOCH__.EPOCH);
    id.timestamp = timestamp.count();
    id.instance = tid;
    id.sequence = sequence++;

    return id;
}

};