// Copyright (c) 2022, Edgeware AB. All rights reserved.

#pragma once

#include <chrono>
#include <cstdint>
#include <fstream>
#include <sstream>

#include "expected.hpp"

namespace TimeCommon {

enum class StratumLevel {
    UnknownStratum,
    stratum0,
    stratum1,
    stratum2,
    stratum3,
    stratum4,
};

struct TAIStatus {
    StratumLevel mStratum = StratumLevel::UnknownStratum;
    bool mHasLock = false;
    double mTimeDiffS = 0.0; // Time diff vs NTP in seconds, +/- value means slow/faster than NTP time
};

// Little endian
// Minimum size packet is 64 - bytes
struct TimeStructure {
    uint64_t t1 = 0;     // 8-bytes / Total 8-bytes  == Client time T1
    uint64_t t2 = 0;     // 8-bytes / Total 16-bytes == Server
    uint64_t t3 = 0;     // 8-bytes / Total 24-bytes
    uint64_t t4 = 0;     // 8-bytes / Total 32-bytes
    uint64_t token = 0;  // 8-bytes / Total 40-bytes == t1 ^ key
    uint64_t dummy1 = 0; // 8-bytes / Total 48-bytes == for future use
    uint64_t dummy2 = 0; // 8-bytes / Total 56-bytes == for future use
    uint64_t dummy3 = 0; // 8-bytes / Total 64-bytes == for future use
};

uint64_t getMonotonicClockMicro();

tl::expected<TimeCommon::TAIStatus, std::string> getStatus();

int64_t getTAIMicro();

std::string taiMicroToString(int64_t taiTimestamp);
} // namespace TimeCommon