// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif

#include <compat/compat.h>
#include <tinyformat.h>
#include <util/time.h>
#include <util/check.h>

#include <atomic>
#include <chrono>
#include <ctime>
#include <locale>
#include <thread>
#include <sstream>
#include <string>

void UninterruptibleSleep(const std::chrono::microseconds& n) { std::this_thread::sleep_for(n); }

static std::atomic<int64_t> nMockTime(0); //!< For testing

NodeClock::time_point NodeClock::now() noexcept
{
    const std::chrono::seconds mocktime{nMockTime.load(std::memory_order_relaxed)};
    const auto ret{
        mocktime.count() ?
            mocktime :
            std::chrono::system_clock::now().time_since_epoch()};
    assert(ret > 0s);
    return time_point{ret};
};

void SetMockTime(int64_t nMockTimeIn)
{
    Assert(nMockTimeIn >= 0);
    nMockTime.store(nMockTimeIn, std::memory_order_relaxed);
}

void SetMockTime(std::chrono::seconds mock_time_in)
{
    nMockTime.store(mock_time_in.count(), std::memory_order_relaxed);
}

std::chrono::seconds GetMockTime()
{
    return std::chrono::seconds(nMockTime.load(std::memory_order_relaxed));
}

int64_t GetTime() { return GetTime<std::chrono::seconds>().count(); }

std::string FormatISO8601DateTime(int64_t nTime) {
    struct tm ts;
    time_t time_val = nTime;
#ifdef HAVE_GMTIME_R
    if (gmtime_r(&time_val, &ts) == nullptr) {
#else
    if (gmtime_s(&ts, &time_val) != 0) {
#endif
        return {};
    }
    return strprintf("%04i-%02i-%02iT%02i:%02i:%02iZ", ts.tm_year + 1900, ts.tm_mon + 1, ts.tm_mday, ts.tm_hour, ts.tm_min, ts.tm_sec);
}

std::string FormatISO8601Date(int64_t nTime) {
    struct tm ts;
    time_t time_val = nTime;
#ifdef HAVE_GMTIME_R
    if (gmtime_r(&time_val, &ts) == nullptr) {
#else
    if (gmtime_s(&ts, &time_val) != 0) {
#endif
        return {};
    }
    return strprintf("%04i-%02i-%02i", ts.tm_year + 1900, ts.tm_mon + 1, ts.tm_mday);
}

struct timeval MillisToTimeval(int64_t nTimeout)
{
    struct timeval timeout;
    timeout.tv_sec  = nTimeout / 1000;
    timeout.tv_usec = (nTimeout % 1000) * 1000;
    return timeout;
}

struct timeval MillisToTimeval(std::chrono::milliseconds ms)
{
    return MillisToTimeval(count_milliseconds(ms));
}