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// 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.

#include <util/time.h>

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

#include <atomic>
#include <chrono>
#include <string>
#include <thread>

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

static std::atomic<std::chrono::seconds> g_mock_time{}; //!< For testing

NodeClock::time_point NodeClock::now() noexcept
{
    const auto mocktime{g_mock_time.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) { SetMockTime(std::chrono::seconds{nMockTimeIn}); }
void SetMockTime(std::chrono::seconds mock_time_in)
{
    Assert(mock_time_in >= 0s);
    g_mock_time.store(mock_time_in, std::memory_order_relaxed);
}

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

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

std::string FormatISO8601DateTime(int64_t nTime)
{
    const std::chrono::sys_seconds secs{std::chrono::seconds{nTime}};
    const auto days{std::chrono::floor<std::chrono::days>(secs)};
    const std::chrono::year_month_day ymd{days};
    const std::chrono::hh_mm_ss hms{secs - days};
    return strprintf("%04i-%02u-%02uT%02i:%02i:%02iZ", signed{ymd.year()}, unsigned{ymd.month()}, unsigned{ymd.day()}, hms.hours().count(), hms.minutes().count(), hms.seconds().count());
}

std::string FormatISO8601Date(int64_t nTime)
{
    const std::chrono::sys_seconds secs{std::chrono::seconds{nTime}};
    const auto days{std::chrono::floor<std::chrono::days>(secs)};
    const std::chrono::year_month_day ymd{days};
    return strprintf("%04i-%02u-%02u", signed{ymd.year()}, unsigned{ymd.month()}, unsigned{ymd.day()});
}

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));
}