#include "SceTypes.hpp"
#include "prx/libc/include/general/VabiMacros.hpp"
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <exception>
#include <initializer_list>
#include <limits>

extern "C" {
int APS5_VABI sceRtcCheckValid(const RtcDateTime*);
int APS5_VABI sceRtcIsLeapYear(int);
int APS5_VABI sceRtcGetDaysInMonth(int, int);
int APS5_VABI sceRtcGetDayOfWeek(int, int, int);
int APS5_VABI sceRtcGetTickResolution(void);
int APS5_VABI sceRtcGetTick(const RtcDateTime*, RtcTick*);
int APS5_VABI sceRtcSetTick(RtcDateTime*, const RtcTick*);
int APS5_VABI sceRtcGetCurrentTick(RtcTick*);
int APS5_VABI sceRtcConvertUtcToLocalTime(const RtcTick*, RtcTick*);
int APS5_VABI sceRtcConvertLocalTimeToUtc(const RtcTick*, RtcTick*);
int APS5_VABI sceRtcGetTime_t(const RtcDateTime*, std::int64_t*);
int APS5_VABI sceRtcSetTime_t(RtcDateTime*, std::int64_t);
int APS5_VABI sceRtcGetWin32FileTime(const RtcDateTime*, std::uint64_t*);
int APS5_VABI sceRtcSetWin32FileTime(RtcDateTime*, std::uint64_t);
int APS5_VABI sceRtcGetDosTime(const RtcDateTime*, std::uint32_t*);
int APS5_VABI sceRtcSetDosTime(RtcDateTime*, std::uint32_t);
int APS5_VABI sceRtcFormatRFC3339(char*, const RtcTick*, int);
int APS5_VABI sceRtcParseRFC3339(RtcTick*, const char*);
int APS5_VABI sceRtcParseDateTime(RtcTick*, const char*);
int APS5_VABI sceRtcTickAddTicks(RtcTick*, const RtcTick*, std::int64_t);
int APS5_VABI sceRtcTickAddSeconds(RtcTick*, const RtcTick*, std::int64_t);
int APS5_VABI sceRtcTickAddDays(RtcTick*, const RtcTick*, std::int32_t);
int APS5_VABI sceRtcTickAddMonths(RtcTick*, const RtcTick*, std::int32_t);
int APS5_VABI sceRtcTickAddYears(RtcTick*, const RtcTick*, std::int16_t);
int APS5_VABI sceRtcFormatRFC3339LocalTime(char*, const RtcTick*);
int APS5_VABI sceRtcFormatRFC2822(char*, const RtcTick*, int);
int APS5_VABI sceRtcFormatRFC2822LocalTime(char*, const RtcTick*);
}

static void Require(bool value) { if (!value) std::abort(); }

static void SetTimeZone(const char* zone) {
#ifdef _WIN32
    _putenv_s("TZ", zone);
    _tzset();
#else
    setenv("TZ", zone, 1);
    tzset();
#endif
}

static bool Equal(const RtcDateTime& left, const RtcDateTime& right) {
    return left.year == right.year && left.month == right.month && left.day == right.day && left.hour == right.hour
        && left.minute == right.minute && left.second == right.second && left.microsecond == right.microsecond;
}

int main() {
    constexpr int invalidPointer = static_cast<int>(0x80B50002);
    constexpr int invalidValue = static_cast<int>(0x80B50003);
    constexpr int badParse = static_cast<int>(0x80B50007);
    constexpr int invalidYear = static_cast<int>(0x80B50008);
    constexpr int invalidMonth = static_cast<int>(0x80B50009);
    constexpr int invalidDay = static_cast<int>(0x80B5000A);
    constexpr int invalidHour = static_cast<int>(0x80B5000B);
    constexpr int invalidMicrosecond = static_cast<int>(0x80B5000E);
    constexpr std::uint64_t unixEpochTick = 62135596800000000ull;
    constexpr std::uint64_t leapDayTick = 63844806896789000ull;
    constexpr std::uint64_t maxTick = 315537897599999999ull;

    Require(sceRtcGetTickResolution() == 1000000);
    Require(sceRtcIsLeapYear(2000) == 1 && sceRtcIsLeapYear(1900) == 0 && sceRtcIsLeapYear(2024) == 1);
    Require(sceRtcIsLeapYear(0) == invalidYear);
    Require(sceRtcGetDaysInMonth(2023, 2) == 28 && sceRtcGetDaysInMonth(2024, 2) == 29 && sceRtcGetDaysInMonth(2024, 4) == 30);
    Require(sceRtcGetDaysInMonth(2024, 13) == invalidMonth);
    Require(sceRtcGetDayOfWeek(1, 1, 1) == 1 && sceRtcGetDayOfWeek(2026, 9, 26) == 6);
    Require(sceRtcGetDayOfWeek(2023, 2, 29) == invalidDay);

    RtcDateTime leapDay{2024, 2, 29, 12, 34, 56, 789000};
    Require(sceRtcCheckValid(&leapDay) == 0);
    Require(sceRtcCheckValid(nullptr) == invalidPointer);
    RtcDateTime invalid = leapDay;
    invalid.year = 2023;
    Require(sceRtcCheckValid(&invalid) == invalidDay);
    invalid = leapDay;
    invalid.hour = 24;
    Require(sceRtcCheckValid(&invalid) == invalidHour);
    invalid = leapDay;
    invalid.microsecond = 1000000;
    Require(sceRtcCheckValid(&invalid) == invalidMicrosecond);

    RtcTick tick{};
    Require(sceRtcGetTick(&leapDay, &tick) == 0 && tick.tick == leapDayTick);
    RtcDateTime converted{};
    Require(sceRtcSetTick(&converted, &tick) == 0 && Equal(converted, leapDay));
    tick.tick = maxTick;
    Require(sceRtcSetTick(&converted, &tick) == 0 && Equal(converted, RtcDateTime{9999, 12, 31, 23, 59, 59, 999999}));
    tick.tick = maxTick + 1;
    Require(sceRtcSetTick(&converted, &tick) == invalidValue);

    RtcDateTime epoch{1970, 1, 1, 0, 0, 0, 0};
    std::int64_t seconds = -1;
    Require(sceRtcGetTime_t(&epoch, &seconds) == 0 && seconds == 0);
    RtcDateTime millennium{2000, 1, 1, 0, 0, 0, 0};
    Require(sceRtcGetTime_t(&millennium, &seconds) == 0 && seconds == 946684800);
    Require(sceRtcSetTime_t(&converted, 946684800) == 0 && Equal(converted, millennium));
    Require(sceRtcSetTime_t(&converted, -1) == invalidValue);
    std::uint64_t fileTime = 0;
    Require(sceRtcGetWin32FileTime(&epoch, &fileTime) == 0 && fileTime == 116444736000000000ull);
    Require(sceRtcSetWin32FileTime(&converted, 116444736000000000ull) == 0 && Equal(converted, epoch));
    std::uint32_t dosTime = 0xffffffffu;
    const RtcDateTime dosDate{2024, 2, 29, 12, 34, 57, 789000};
    Require(sceRtcGetDosTime(&dosDate, &dosTime) == 0 && dosTime == 0x585d645cu);
    const RtcDateTime dosFirst{1980, 1, 1, 0, 0, 0, 0};
    Require(sceRtcGetDosTime(&dosFirst, &dosTime) == 0 && dosTime == 0x00210000u);
    const RtcDateTime dosLast{2107, 12, 31, 23, 59, 59, 0};
    Require(sceRtcGetDosTime(&dosLast, &dosTime) == 0 && dosTime == 0xff9fbf7du);
    Require(sceRtcGetDosTime(&dosDate, nullptr) == invalidPointer);
    Require(sceRtcGetDosTime(nullptr, &dosTime) == invalidPointer);
    const RtcDateTime dosBadMonth{2024, 13, 1, 0, 0, 0, 0};
    Require(sceRtcGetDosTime(&dosBadMonth, &dosTime) == invalidMonth);
    const RtcDateTime dosEarly{1979, 12, 31, 0, 0, 0, 0};
    Require(sceRtcGetDosTime(&dosEarly, &dosTime) == invalidYear && dosTime == 0);
    const RtcDateTime dosLate{2108, 1, 1, 0, 0, 0, 0};
    Require(sceRtcGetDosTime(&dosLate, &dosTime) == invalidYear && dosTime == 0xff9fbf7du);
    converted = RtcDateTime{1, 1, 1, 1, 1, 1, 1};
    Require(sceRtcSetDosTime(&converted, 0x585d645cu) == 0 && Equal(converted, RtcDateTime{2024, 2, 29, 12, 34, 56, 0}));
    Require(sceRtcSetDosTime(&converted, 0x7f9fbf7du) == 0 && Equal(converted, RtcDateTime{2043, 12, 31, 23, 59, 58, 0}));
    Require(sceRtcSetDosTime(&converted, 0) == 0 && Equal(converted, RtcDateTime{1980, 0, 0, 0, 0, 0, 0}));
    Require(sceRtcSetDosTime(nullptr, 0) == invalidPointer);
    Require(sceRtcSetDosTime(&converted, 0xff9fbf7du) == 0 && Equal(converted, RtcDateTime{2107, 12, 31, 23, 59, 58, 0}));
    Require(sceRtcSetDosTime(&converted, 0x80210000u) == 0 && Equal(converted, RtcDateTime{2044, 1, 1, 0, 0, 0, 0}));

    char text[32];
    tick.tick = leapDayTick;
    Require(sceRtcFormatRFC3339(text, &tick, 0) == 0 && std::strcmp(text, "2024-02-29T12:34:56.78Z") == 0);
    Require(sceRtcFormatRFC3339(text, &tick, 90) == 0 && std::strcmp(text, "2024-02-29T14:04:56.78+01:30") == 0);
    Require(sceRtcFormatRFC3339(text, &tick, -300) == 0 && std::strcmp(text, "2024-02-29T07:34:56.78-05:00") == 0);
    Require(sceRtcFormatRFC3339(text, &tick, 1439) == 0 && std::strcmp(text, "2024-03-01T12:33:56.78+23:59") == 0);
    Require(sceRtcFormatRFC3339(text, &tick, -1439) == 0 && std::strcmp(text, "2024-02-28T12:35:56.78-23:59") == 0);
    for (int offset : {0, 1, -1, 59, -59, 60, -60, 90, -300, 1439, -1439}) {
        RtcTick parsed{};
        Require(sceRtcFormatRFC3339(text, &tick, offset) == 0);
        Require(sceRtcParseRFC3339(&parsed, text) == 0 && parsed.tick == leapDayTick - 9000);
    }
    for (int offset : {1440, -1440, 6000, -6000, std::numeric_limits<int>::min(), std::numeric_limits<int>::max()}) {
        std::memset(text, 'x', sizeof(text));
        char original[sizeof(text)];
        std::memcpy(original, text, sizeof(text));
        Require(sceRtcFormatRFC3339(text, &tick, offset) == invalidValue);
        Require(std::memcmp(text, original, sizeof(text)) == 0);
    }
    Require(sceRtcFormatRFC3339(nullptr, &tick, 1440) == invalidPointer);
    Require(sceRtcFormatRFC3339(text, nullptr, 1440) == invalidPointer);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T14:04:56.789+01:30") == 0 && tick.tick == leapDayTick);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29t12:34:56.789z") == 0 && tick.tick == leapDayTick);
    Require(sceRtcParseRFC3339(&tick, "1970-01-01T00:00:00Z") == 0 && tick.tick == unixEpochTick);
    Require(sceRtcParseRFC3339(&tick, "2023-02-29T00:00:00Z") == invalidDay);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:56") == badParse);
    const std::uint64_t secondTick = leapDayTick - 789000ull;
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:56Zjunk") == 0 && tick.tick == secondTick);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T14:34:56+02:00 trailing") == 0 && tick.tick == secondTick);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:56.Z") == 0 && tick.tick == secondTick);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:56.1234567Z") == 0 && tick.tick == secondTick + 123456ull);
    const struct {
        const char* text;
        std::int64_t minutes;
    } unrangedOffsets[] = {
        {"2024-02-29T12:34:56.789+00:99", 99},
        {"2024-02-29T12:34:56.789-00:99", -99},
        {"2024-02-29T12:34:56.789+00:60", 60},
        {"2024-02-29T12:34:56.789-00:60", -60},
        {"2024-02-29T12:34:56.789+24:00", 1440},
        {"2024-02-29T12:34:56.789-24:00", -1440},
        {"2024-02-29T12:34:56.789+99:59", 5999},
        {"2024-02-29T12:34:56.789-99:99", -6039},
    };
    for (const auto& offset : unrangedOffsets) {
        Require(sceRtcParseRFC3339(&tick, offset.text) == 0);
        Require(tick.tick == leapDayTick - static_cast<std::uint64_t>(offset.minutes * 60000000));
    }
    for (const char* text : {"2024-02-29 12:34:56Z", "2024-02-29T12:34:56+0100", "2024-02-29T12:34:56+01", "2024-02-29T12:34:56 Z", " 2024-02-29T12:34:56Z", "2024-02-29T12:34:56..Z", "2024-2-29T12:34:56Z"}) {
        tick.tick = 123;
        Require(sceRtcParseRFC3339(&tick, text) == badParse);
        Require(tick.tick == 123);
    }
    tick.tick = 123;
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:60Z") == 0 && tick.tick == 123);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:60+01:00") == 0 && tick.tick == 123ull - 3600000000ull);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:61Z") == static_cast<int>(0x80B5000D));
    Require(sceRtcParseRFC3339(&tick, "0000-13-40T99:99:99Z") == static_cast<int>(0x80B50008));
    Require(sceRtcParseRFC3339(&tick, "0001-01-01T00:00:00+01:00") == 0 && tick.tick == 0xFFFFFFFF296C5C00ull);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:56.789+00:00") == 0 && tick.tick == leapDayTick);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:56.789-00:00") == 0 && tick.tick == leapDayTick);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:56.789+00:59") == 0 && tick.tick == leapDayTick - 3540000000ull);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:56.789-00:59") == 0 && tick.tick == leapDayTick + 3540000000ull);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:56.789+23:59") == 0 && tick.tick == leapDayTick - 86340000000ull);
    Require(sceRtcParseRFC3339(&tick, "2024-02-29T12:34:56.789-23:59") == 0 && tick.tick == leapDayTick + 86340000000ull);
    Require(sceRtcParseRFC3339(nullptr, "1970-01-01T00:00:00Z") == invalidPointer);

    for (const char* text : {"2024-02-29T12:34:56.789", "2024-02-29 12:34:56", "2024-02-29 12:34:56Z", "2024-02-29", "2024/02/29T12:34:56Z", "2024-02-29T12:34:56."}) {
        tick.tick = 123;
        Require(sceRtcParseDateTime(&tick, text) == badParse);
        Require(tick.tick == 123);
    }
    Require(sceRtcParseDateTime(&tick, " \t 2024-02-29T12:34:56.789Z") == 0 && tick.tick == leapDayTick);
    Require(sceRtcParseDateTime(&tick, "2024-02-29T12:34:56.789Zjunk") == 0 && tick.tick == leapDayTick);
    Require(sceRtcParseDateTime(&tick, "2024-02-29T12:34:56.789+99:99") == 0 && tick.tick == leapDayTick - 6039ull * 60000000ull);
    tick.tick = 123;
    Require(sceRtcParseDateTime(&tick, "2024-02-29T12:34:60-01:00") == 0 && tick.tick == 123ull + 3600000000ull);
    Require(sceRtcParseDateTime(&tick, "2024-13-01T00:00:00Z") == static_cast<int>(0x80B50009));
    Require(sceRtcParseDateTime(&tick, "2024-02-29T14:04:56.789+01:30") == 0 && tick.tick == leapDayTick);
    Require(sceRtcParseDateTime(&tick, "2024-02-29t12:34:56.789z") == 0 && tick.tick == leapDayTick);
    Require(sceRtcParseDateTime(&tick, "1970-01-01T00:00:00Z") == 0 && tick.tick == unixEpochTick);
    Require(sceRtcParseDateTime(&tick, "2023-02-29T00:00:00Z") == invalidDay);
    Require(sceRtcParseDateTime(nullptr, "1970-01-01T00:00:00Z") == invalidPointer);
    Require(sceRtcParseDateTime(&tick, "Thu, 29 Feb 2024 12:34:56") == 0 && tick.tick == leapDayTick - 789000ull);
    Require(sceRtcParseDateTime(&tick, "Thu, 29 Feb 2024 12:34:56 GMT") == 0 && tick.tick == leapDayTick - 789000ull);
    Require(sceRtcParseDateTime(&tick, "Thu, 29 Feb 2024 14:04:56 +0130") == 0 && tick.tick == leapDayTick - 789000ull);
    Require(sceRtcParseDateTime(&tick, "Thu, 29 Feb 2024 11:04:56 -0130") == 0 && tick.tick == leapDayTick - 789000ull);
    Require(sceRtcParseDateTime(&tick, "Thu, 01 Jan 1970 00:00:00 +0000") == 0 && tick.tick == unixEpochTick);
    Require(sceRtcParseDateTime(&tick, "Thu Feb 29 12:34:56 2024") == 0 && tick.tick == leapDayTick - 789000ull);
    Require(sceRtcParseDateTime(&tick, "Thu Jan  1 00:00:00 1970") == 0 && tick.tick == unixEpochTick);
    const auto at = [](int year, int month, int day, int hour, int minute, int second) {
        const RtcDateTime time{static_cast<std::uint16_t>(year), static_cast<std::uint16_t>(month), static_cast<std::uint16_t>(day),
            static_cast<std::uint16_t>(hour), static_cast<std::uint16_t>(minute), static_cast<std::uint16_t>(second), 0};
        RtcTick result{};
        Require(sceRtcGetTick(&time, &result) == 0);
        return result.tick;
    };
    constexpr std::uint64_t untouched = 123;
    const std::uint64_t march = at(2024, 3, 1, 12, 34, 56);
    const struct {
        const char* text;
        int result;
        std::uint64_t local;
        std::int64_t minutes;
    } dateTimes[] = {
        {"thursday,29-feb-24 12:34:56", 0, leapDayTick - 789000ull, 0},
        {"Mon 29 February 2024 12:34:56 -0130", 0, leapDayTick - 789000ull, -90},
        {" \tFri, 01 Mar 2024 12:34:56 GMT", 0, march, 0},
        {"Thu, 1-Mar 2024 12:34:56 -9999", 0, march, -6039},
        {"Thu, 01 Mar 2024 12:34:56 +01:30", 0, march, 0},
        {"Thu, 01 Mar 2024 12:34:56 +0130x", 0, march, 90},
        {"Thu, 01 Mar 2024 12:34:56 PST8PDT", 0, march, -480},
        {"Thu, 01 Mar 2024 12:34:56 nzdt", 0, march, 780},
        {"Thu, 01 Mar 2024 12:34:56 KST", 0, march, 540},
        {"Thu, 01 Mar 2024 12:34:56 HST", 0, march, 420},
        {"Thu, 01 Mar 2024 12:34:56 Jt", 0, march, 450},
        {"Thu, 01 Mar 2024 12:34:56 ut", 0, march, -420},
        {"Thu, 01 Mar 2024 12:34:56 xT", 0, march, 0},
        {"Thu, 01 Mar 2024 12:34:56 Ux", 0, march, 0},
        {"Thu, 01 Mar 2024 12:34:56 B", 0, march, 60},
        {"Thu, 01 Mar 2024 12:34:56 m", 0, march, 720},
        {"Thu, 01 Mar 2024 12:34:56 N", 0, march, 0},
        {"Thu, 01 Mar 2024 12:34:56 y", 0, march, -660},
        {"Thu, 01 Mar 2024 12:34:56 Z", 0, march, 0},
        {"Thu, 01 Mar 2024 12:34:56 J", badParse, untouched, 0},
        {"Thu, 01 Mar 2024 12:34:56  +0100", badParse, untouched, 0},
        {"Thu, 01 Mar 2024 12:34:56 (UTC)", badParse, untouched, 0},
        {"Thu, 01 Mar 2024 12:34:56\tEST", 0, march, 0},
        {"Thu, 01 Mar 2024 12:34:56 ", 0, march, 0},
        {"Thu, 01 Mar 2024 12:34:567 EST", 0, march, 0},
        {"Thu, 01 Mar 2024 12:34 EST", 0, at(2024, 3, 1, 12, 34, 0), 0},
        {"Thu, 29 Feb 2024 12:34", badParse, untouched, 0},
        {"Thu, 01 Mar 2024 12:34", badParse, untouched, 0},
        {"Thu, 29 Feb 2024 12:34 ", 0, at(2024, 2, 29, 12, 34, 0), 0},
        {"Thu, 01 Mar 2024 12:34EST", badParse, untouched, 0},
        {"Thu, 01 Mar 2024 1:2:3 EST", 0, at(2024, 3, 1, 1, 2, 3), -300},
        {"Thu, 01 Mar 2024 26:00:00 GMT", badParse, untouched, 0},
        {"Thu, 01 Mar 2024 25:00:00 +0100", 0, untouched, 60},
        {"Thu, 29 Feb 2023 12:34:56 EST", 0, untouched, -300},
        {"Thu, 01 Mar 49 12:34:56 GMT", 0, at(2049, 3, 1, 12, 34, 56), 0},
        {"Thu, 01 Mar 50 12:34:56 GMT", 0, at(1950, 3, 1, 12, 34, 56), 0},
        {"Mon, 01 Jan 0001 00:00:00 +0100", 0, 0, 60},
        {"Thu, 01 Mar 024 12:34:56 GMT", badParse, untouched, 0},
        {"Thu, 01 Mar 10000 12:34:56 GMT", badParse, untouched, 0},
        {"Thu, 001 Mar 2024 12:34:56 GMT", badParse, untouched, 0},
        {"Thu, 01  Mar 2024 12:34:56 GMT", badParse, untouched, 0},
        {"Thu, 01 Mar 2024\t12:34:56 GMT", badParse, untouched, 0},
        {"Thu, 01 Sept 2024 12:34:56 GMT", badParse, untouched, 0},
        {"Thurs, 01 Mar 2024 12:34:56 GMT", badParse, untouched, 0},
        {"Thu , 01 Mar 2024 12:34:56 GMT", badParse, untouched, 0},
        {", 01 Mar 2024 12:34:56 GMT", badParse, untouched, 0},
        {"\nThu, 01 Mar 2024 12:34:56 GMT", badParse, untouched, 0},
        {"THURSDAY february  9 1:2:3 2024 +0100", 0, at(2024, 2, 9, 1, 2, 3), 0},
        {"ThuMar  1 12:34:56 10000", 0, at(1000, 3, 1, 12, 34, 56), 0},
        {"Thu,\tFeb 29 12:34:56 2024", 0, leapDayTick - 789000ull, 0},
        {"Thu Feb 29 99:99:99 2024", 0, untouched, 0},
        {"Thu Feb  29 12:34:56 2024", badParse, untouched, 0},
        {"Thu Feb 29 12:34 2024", badParse, untouched, 0},
        {"Thu Feb 29 12:34:56 24", badParse, untouched, 0},
        {"Thu Feb 29 12:34:56\t2024", badParse, untouched, 0},
        {"Feb 29 12:34:56 2024", badParse, untouched, 0},
        {"\n2024-02-29T12:34:56Z", badParse, untouched, 0},
        {"+2024-02-29T12:34:56Z", badParse, untouched, 0},
        {"", badParse, untouched, 0},
    };
    for (const auto& dateTime : dateTimes) {
        tick.tick = untouched;
        Require(sceRtcParseDateTime(&tick, dateTime.text) == dateTime.result);
        Require(tick.tick == dateTime.local - static_cast<std::uint64_t>(dateTime.minutes * 60000000));
    }

    const struct {
        const char* name;
        std::int64_t minutes;
    } additionalZones[] = {
        {"SWT", 60}, {"MEZ", 60}, {"WETDST", 60}, {"METDST", 120}, {"EETDST", 180},
        {"AESST", 660}, {"ACSST", 630}, {"CAST", 570}, {"CADT", 630}, {"SAST", 570}, {"SADT", 630}, {"WST", 480}, {"WDT", 540},
    };
    for (const auto& zone : additionalZones) {
        char text[80];
        std::snprintf(text, sizeof(text), "Thu, 29 Feb 2024 12:34:56 %s", zone.name);
        tick.tick = untouched;
        Require(sceRtcParseDateTime(&tick, text) == 0);
        Require(tick.tick == leapDayTick - 789000ull - static_cast<std::uint64_t>(zone.minutes * 60000000));
        char lower[16]{};
        for (std::size_t i = 0; zone.name[i] != 0; ++i) lower[i] = static_cast<char>(zone.name[i] + ('a' - 'A'));
        std::snprintf(text, sizeof(text), "Thu, 29 Feb 2024 12:34:56 %s", lower);
        tick.tick = untouched;
        Require(sceRtcParseDateTime(&tick, text) == 0);
        Require(tick.tick == leapDayTick - 789000ull - static_cast<std::uint64_t>(zone.minutes * 60000000));
        std::snprintf(text, sizeof(text), "Thu, 29 Feb 2024 12:34:56 %sextra", zone.name);
        tick.tick = untouched;
        Require(sceRtcParseDateTime(&tick, text) == 0);
        Require(tick.tick == leapDayTick - 789000ull - static_cast<std::uint64_t>(zone.minutes * 60000000));
        std::snprintf(text, sizeof(text), "Wed, 01 Mar 2000 08:09:10 %s", zone.name);
        tick.tick = untouched;
        Require(sceRtcParseDateTime(&tick, text) == 0);
        Require(tick.tick == at(2000, 3, 1, 8, 9, 10) - static_cast<std::uint64_t>(zone.minutes * 60000000));
    }

    RtcTick source{leapDayTick};
    RtcTick result{};
    Require(sceRtcTickAddSeconds(&result, &source, 3600) == 0 && result.tick == leapDayTick + 3600000000ull);
    Require(sceRtcTickAddDays(&result, &source, 1) == 0);
    Require(sceRtcSetTick(&converted, &result) == 0 && converted.month == 3 && converted.day == 1);
    Require(sceRtcTickAddYears(&result, &source, 1) == 0);
    Require(sceRtcSetTick(&converted, &result) == 0 && converted.year == 2025 && converted.month == 2 && converted.day == 28);
    RtcDateTime endOfJanuary{2024, 1, 31, 8, 0, 0, 0};
    Require(sceRtcGetTick(&endOfJanuary, &source) == 0);
    Require(sceRtcTickAddMonths(&result, &source, 1) == 0);
    Require(sceRtcSetTick(&converted, &result) == 0 && Equal(converted, RtcDateTime{2024, 2, 29, 8, 0, 0, 0}));
    Require(sceRtcTickAddMonths(&result, &source, -12 * 2024) == invalidValue);
    source.tick = 5;
    Require(sceRtcTickAddTicks(&result, &source, -6) == invalidValue);
    Require(sceRtcTickAddTicks(&result, &source, -5) == 0 && result.tick == 0);
    source.tick = maxTick;
    Require(sceRtcTickAddTicks(&result, &source, 1) == invalidValue);
    Require(sceRtcTickAddTicks(nullptr, &source, 1) == invalidPointer);

    const std::uint64_t invalidTicks[] = {maxTick + 1, std::numeric_limits<std::uint64_t>::max()};
    for (std::uint64_t invalidTick : invalidTicks) {
        source.tick = invalidTick;
        result.tick = 123;
        Require(sceRtcTickAddTicks(&result, &source, 0) == invalidValue && result.tick == 123);
        Require(sceRtcTickAddTicks(&result, &source, 1) == invalidValue && result.tick == 123);
        Require(sceRtcTickAddTicks(&result, &source, -1) == invalidValue && result.tick == 123);
        Require(sceRtcTickAddSeconds(&result, &source, 0) == invalidValue && result.tick == 123);
        Require(sceRtcTickAddDays(&result, &source, -1) == invalidValue && result.tick == 123);
        Require(sceRtcTickAddMonths(&result, &source, 0) == invalidValue && result.tick == 123);
        Require(sceRtcTickAddYears(&result, &source, -1) == invalidValue && result.tick == 123);
        Require(sceRtcTickAddTicks(&source, &source, 0) == invalidValue && source.tick == invalidTick);
        Require(sceRtcTickAddMonths(&source, &source, -1) == invalidValue && source.tick == invalidTick);
        Require(sceRtcTickAddTicks(nullptr, &source, 0) == invalidPointer);
        Require(sceRtcTickAddMonths(nullptr, &source, 0) == invalidPointer);
    }

    source.tick = maxTick;
    Require(sceRtcTickAddTicks(&source, &source, 0) == 0 && source.tick == maxTick);
    Require(sceRtcTickAddTicks(&source, &source, -1) == 0 && source.tick == maxTick - 1);
    source.tick = maxTick;
    Require(sceRtcTickAddMonths(&source, &source, 0) == 0 && source.tick == maxTick);
    Require(sceRtcTickAddYears(&result, &source, -1) == 0);
    Require(sceRtcSetTick(&converted, &result) == 0 && Equal(converted, RtcDateTime{9998, 12, 31, 23, 59, 59, 999999}));
    result.tick = 123;
    Require(sceRtcTickAddMonths(&result, &source, 1) == invalidValue && result.tick == 123);
    Require(sceRtcTickAddTicks(&result, &source, std::numeric_limits<std::int64_t>::min()) == invalidValue && result.tick == 123);
    Require(sceRtcTickAddSeconds(&result, &source, std::numeric_limits<std::int64_t>::max()) == invalidValue && result.tick == 123);
    source.tick = 0;
    Require(sceRtcTickAddMonths(&source, &source, 0) == 0 && source.tick == 0);
    Require(sceRtcTickAddMonths(&result, &source, -1) == invalidValue && result.tick == 123);

    RtcTick now{};
    Require(sceRtcGetCurrentTick(&now) == 0 && now.tick > leapDayTick);
    RtcTick local{};
    RtcTick back{};
    Require(sceRtcConvertUtcToLocalTime(&now, &local) == 0);
    Require(sceRtcConvertLocalTimeToUtc(&local, &back) == 0 && back.tick == now.tick);

    char rfc2822[32];
    tick.tick = leapDayTick;
    Require(sceRtcFormatRFC2822(rfc2822, &tick, 0) == 0 && std::strcmp(rfc2822, "Thu, 29 Feb 2024 12:34:56 +0000") == 0);
    Require(sceRtcFormatRFC2822(rfc2822, &tick, 90) == 0 && std::strcmp(rfc2822, "Thu, 29 Feb 2024 14:04:56 +0130") == 0);
    Require(sceRtcFormatRFC2822(rfc2822, &tick, -300) == 0 && std::strcmp(rfc2822, "Thu, 29 Feb 2024 07:34:56 -0500") == 0);
    Require(sceRtcFormatRFC2822(rfc2822, &tick, -30) == 0 && std::strcmp(rfc2822, "Thu, 29 Feb 2024 12:04:56 -0030") == 0);
    Require(sceRtcFormatRFC2822(rfc2822, &tick, 65) == 0 && std::strcmp(rfc2822, "Thu, 29 Feb 2024 13:39:56 +0105") == 0);
    Require(sceRtcFormatRFC2822(rfc2822, &tick, 1439) == 0 && std::strcmp(rfc2822, "Fri, 01 Mar 2024 12:33:56 +2359") == 0);
    Require(sceRtcFormatRFC2822(rfc2822, &tick, -1439) == 0 && std::strcmp(rfc2822, "Wed, 28 Feb 2024 12:35:56 -2359") == 0);
    const char* week[] = {"Sun, 03 Mar", "Mon, 04 Mar", "Tue, 05 Mar", "Wed, 06 Mar", "Thu, 07 Mar", "Fri, 08 Mar", "Sat, 09 Mar"};
    for (int day = 0; day < 7; ++day) {
        const RtcDateTime date{2024, 3, static_cast<std::uint16_t>(3 + day), 0, 0, 0, 0};
        Require(sceRtcGetTick(&date, &tick) == 0 && sceRtcFormatRFC2822(rfc2822, &tick, 0) == 0);
        Require(std::strncmp(rfc2822, week[day], std::strlen(week[day])) == 0);
    }
    tick.tick = 0;
    Require(sceRtcFormatRFC2822(rfc2822, &tick, 0) == 0 && std::strcmp(rfc2822, "Mon, 01 Jan 0001 00:00:00 +0000") == 0);
    Require(sceRtcFormatRFC2822(rfc2822, &tick, -1) == invalidValue);
    tick.tick = maxTick;
    Require(sceRtcFormatRFC2822(rfc2822, &tick, 0) == 0 && std::strcmp(rfc2822, "Fri, 31 Dec 9999 23:59:59 +0000") == 0);
    Require(sceRtcFormatRFC2822(rfc2822, &tick, 1) == invalidValue);
    tick.tick = leapDayTick;
    for (int offset : {1440, -1440, std::numeric_limits<int>::min(), std::numeric_limits<int>::max()}) {
        std::memset(rfc2822, 'x', sizeof(rfc2822));
        char original[sizeof(rfc2822)];
        std::memcpy(original, rfc2822, sizeof(rfc2822));
        Require(sceRtcFormatRFC2822(rfc2822, &tick, offset) == invalidValue);
        Require(std::memcmp(rfc2822, original, sizeof(rfc2822)) == 0);
    }
    Require(sceRtcFormatRFC2822(nullptr, &tick, 0) == invalidPointer);
    Require(sceRtcFormatRFC2822(rfc2822, nullptr, 0) == invalidPointer);

    SetTimeZone("XXX-5:30");
    Require(sceRtcFormatRFC2822LocalTime(rfc2822, &tick) == 0 && std::strcmp(rfc2822, "Thu, 29 Feb 2024 18:04:56 +0530") == 0);
    Require(sceRtcFormatRFC3339LocalTime(text, &tick) == 0 && std::strcmp(text, "2024-02-29T18:04:56.78+05:30") == 0);
    SetTimeZone("XXX+3");
    Require(sceRtcFormatRFC2822LocalTime(rfc2822, &tick) == 0 && std::strcmp(rfc2822, "Thu, 29 Feb 2024 09:34:56 -0300") == 0);
    Require(sceRtcFormatRFC3339LocalTime(text, &tick) == 0 && std::strcmp(text, "2024-02-29T09:34:56.78-03:00") == 0);
    SetTimeZone("UTC0");
    Require(sceRtcFormatRFC2822LocalTime(rfc2822, &tick) == 0 && std::strcmp(rfc2822, "Thu, 29 Feb 2024 12:34:56 +0000") == 0);
    Require(sceRtcFormatRFC3339LocalTime(text, &tick) == 0 && std::strcmp(text, "2024-02-29T12:34:56.78Z") == 0);
    Require(sceRtcFormatRFC2822LocalTime(nullptr, &tick) == invalidPointer);
    Require(sceRtcFormatRFC2822LocalTime(rfc2822, nullptr) == invalidPointer);
    Require(sceRtcFormatRFC3339LocalTime(nullptr, &tick) == invalidPointer);
    Require(sceRtcFormatRFC3339LocalTime(text, nullptr) == invalidPointer);
    for (const char* zone : {"UTC0", "XXX-5:30", "XXX+3"}) {
        SetTimeZone(zone);
        for (std::uint64_t invalidTick : {maxTick + 1, std::uint64_t{1} << 63u, std::numeric_limits<std::uint64_t>::max()}) {
            source.tick = invalidTick;
            result.tick = 123;
            Require(sceRtcConvertUtcToLocalTime(&source, &result) == invalidValue && result.tick == 123);
            Require(sceRtcConvertLocalTimeToUtc(&source, &result) == invalidValue && result.tick == 123);
            Require(sceRtcConvertUtcToLocalTime(&source, &source) == invalidValue && source.tick == invalidTick);
            Require(sceRtcConvertLocalTimeToUtc(&source, &source) == invalidValue && source.tick == invalidTick);
            std::memset(text, 'x', sizeof(text));
            char originalText[sizeof(text)];
            std::memcpy(originalText, text, sizeof(text));
            Require(sceRtcFormatRFC3339LocalTime(text, &source) == invalidValue);
            Require(std::memcmp(text, originalText, sizeof(text)) == 0);
            std::memset(rfc2822, 'x', sizeof(rfc2822));
            char originalRfc2822[sizeof(rfc2822)];
            std::memcpy(originalRfc2822, rfc2822, sizeof(rfc2822));
            Require(sceRtcFormatRFC2822LocalTime(rfc2822, &source) == invalidValue);
            Require(std::memcmp(rfc2822, originalRfc2822, sizeof(rfc2822)) == 0);
        }
        source.tick = leapDayTick;
        Require(sceRtcConvertUtcToLocalTime(&source, &result) == 0);
        Require(sceRtcConvertLocalTimeToUtc(&result, &result) == 0 && result.tick == source.tick);
    }
    SetTimeZone("UTC0");

#ifndef _WIN32
    SetTimeZone("STD0DST,J1/0,J2/0");
    const std::time_t beforeTransition = -1;
    const std::time_t atTransition = 0;
    std::tm beforeState{}, afterState{};
    Require(localtime_r(&beforeTransition, &beforeState) != nullptr && beforeState.tm_isdst == 0);
    Require(localtime_r(&atTransition, &afterState) != nullptr && afterState.tm_isdst == 1);
    for (const std::uint64_t distance : {1000000ull, 500000ull, 1ull}) {
        source.tick = unixEpochTick - distance;
        Require(sceRtcConvertUtcToLocalTime(&source, &result) == 0 && result.tick == source.tick);
        Require(sceRtcConvertUtcToLocalTime(&source, &source) == 0 && source.tick == unixEpochTick - distance);
    }
    for (const std::uint64_t distance : {0ull, 500000ull}) {
        source.tick = unixEpochTick + distance;
        Require(sceRtcConvertUtcToLocalTime(&source, &result) == 0 && result.tick == source.tick + 3600000000ull);
    }
    tick.tick = unixEpochTick - 500000ull;
    Require(sceRtcFormatRFC3339LocalTime(text, &tick) == 0 && std::strcmp(text, "1969-12-31T23:59:59.50Z") == 0);
    Require(sceRtcFormatRFC2822LocalTime(rfc2822, &tick) == 0 && std::strcmp(rfc2822, "Wed, 31 Dec 1969 23:59:59 +0000") == 0);
    SetTimeZone("UTC0");
#endif
}