lic function hoursToDays() {
     *     return function () {
     *       $this->days += $this->hours;
     *       $this->hours = 0;
     *
     *       return $this;
     *     };
     *   }
     * });
     * echo CarbonInterval::hours(5)->hoursToDays() . "\n";
     * echo CarbonInterval::days(5)->daysToHours() . "\n";
     * ```
     *
     * @param object|string $mixin
     *
     * @throws ReflectionException
     *
     * @return void
     */
    public static function mixin($mixin): void
    {
        static::baseMixin($mixin);
    }

    /**
     * Check if macro is registered.
     *
     * @param string $name
     *
     * @return bool
     */
    public static function hasMacro(string $name): bool
    {
        return isset(static::$macros[$name]);
    }

    /**
     * Call given macro.
     *
     * @param string $name
     * @param array  $parameters
     *
     * @return mixed
     */
    protected function callMacro(string $name, array $parameters)
    {
        $macro = static::$macros[$name];

        if ($macro instanceof Closure) {
            $boundMacro = @$macro->bindTo($this, static::class) ?: @$macro->bindTo(null, static::class);

            return ($boundMacro ?: $macro)(...$parameters);
        }

        return $macro(...$parameters);
    }

    /**
     * Allow fluent calls on the setters... CarbonInterval::years(3)->months(5)->day().
     *
     * Note: This is done using the magic method to allow static and instance methods to
     *       have the same names.
     *
     * @param string $method     magic method name called
     * @param array  $parameters parameters list
     *
     * @throws BadFluentSetterException|Throwable
     *
     * @return static|int|float|string
     */
    public function __call(string $method, array $parameters)
    {
        if (static::hasMacro($method)) {
            return static::bindMacroContext($this, function () use (&$method, &$parameters) {
                return $this->callMacro($method, $parameters);
            });
        }

        $roundedValue = $this->callRoundMethod($method, $parameters);

        if ($roundedValue !== null) {
            return $roundedValue;
        }

        if (preg_match('/^(?<method>add|sub)(?<unit>[A-Z].*)$/', $method, $match)) {
            $value = $this->getMagicParameter($parameters, 0, Carbon::pluralUnit($match['unit']), 0);

            return $this->{$match['method']}($value, $match['unit']);
        }

        $value = $this->getMagicParameter($parameters, 0, Carbon::pluralUnit($method), 1);

        try {
            $this->set($method, $value);
        } catch (UnknownSetterException $exception) {
            if ($this->localStrictModeEnabled ?? Carbon::isStrictModeEnabled()) {
                throw new BadFluentSetterException($method, 0, $exception);
            }
        }

        return $this;
    }

    protected function getForHumansInitialVariables($syntax, $short): array
    {
        if (\is_array($syntax)) {
            return $syntax;
        }

        if (\is_int($short)) {
            return [
                'parts' => $short,
                'short' => false,
            ];
        }

        if (\is_bool($syntax)) {
            return [
                'short' => $syntax,
                'syntax' => CarbonInterface::DIFF_ABSOLUTE,
            ];
        }

        return [];
    }

    /**
     * @param mixed $syntax
     * @param mixed $short
     * @param mixed $parts
     * @param mixed $options
     *
     * @return array
     */
    protected function getForHumansParameters($syntax = null, $short = false, $parts = self::NO_LIMIT, $options = null): array
    {
        $optionalSpace = ' ';
        $default = $this->getTranslationMessage('list.0') ?? $this->getTranslationMessage('list') ?? ' ';
        /** @var bool|string $join */
        $join = $default === '' ? '' : ' ';
        /** @var bool|array|string $altNumbers */
        $altNumbers = false;
        $aUnit = false;
        $minimumUnit = 's';
        $skip = [];
        extract($this->getForHumansInitialVariables($syntax, $short));
        $skip = array_map(
            static fn ($unit) => $unit instanceof Unit ? $unit->value : $unit,
            (array) $skip,
        );
        $skip = array_map(
            'strtolower',
            array_filter($skip, static fn ($unit) => \is_string($unit) && $unit !== ''),
        );

        $syntax ??= CarbonInterface::DIFF_ABSOLUTE;

        if ($parts === self::NO_LIMIT) {
            $parts = INF;
        }

        $options ??= static::getHumanDiffOptions();

        if ($join === false) {
            $join = ' ';
        } elseif ($join === true) {
            $join = [
                $default,
                $this->getTranslationMessage('list.1') ?? $default,
            ];
        }

        if ($altNumbers && $altNumbers !== true) {
            $language = new Language($this->locale);
            $altNumbers = \in_array($language->getCode(), (array) $altNumbers, true);
        }

        if (\is_array($join)) {
            [$default, $last] = $join;

            if ($default !== ' ') {
                $optionalSpace = '';
            }

            $join = function ($list) use ($default, $last) {
                if (\count($list) < 2) {
                    return implode('', $list);
                }

                $end = array_pop($list);

                return implode($default, $list).$last.$end;
            };
        }

        if (\is_string($join)) {
            if ($join !== ' ') {
                $optionalSpace = '';
            }

            $glue = $join;
            $join = static fn ($list) => implode($glue, $list);
        }

        $interpolations = [
            ':optional-space' => $optionalSpace,
        ];

        $translator ??= isset($locale) ? Translator::get($locale) : null;

        return [$syntax, $short, $parts, $options, $join, $aUnit, $altNumbers, $interpolations, $minimumUnit, $skip, $translator];
    }

    protected static function getRoundingMethodFromOptions(int $options): ?string
    {
        if ($options & CarbonInterface::ROUND) {
            return 'round';
        }

        if ($options & CarbonInterface::CEIL) {
            return 'ceil';
        }

        if ($options & CarbonInterface::FLOOR) {
            return 'floor';
        }

        return null;
    }

    /**
     * Returns interval values as an array where key are the unit names and values the counts.
     *
     * @return int[]
     */
    public function toArray(): array
    {
        return [
            'years' => $this->years,
            'months' => $this->months,
            'weeks' => $this->weeks,
            'days' => $this->daysExcludeWeeks,
            'hours' => $this->hours,
            'minutes' => $this->minutes,
            'seconds' => $this->seconds,
            'microseconds' => $this->microseconds,
        ];
    }

    /**
     * Returns interval non-zero values as an array where key are the unit names and values the counts.
     *
     * @return int[]
     */
    public function getNonZeroValues(): array
    {
        return array_filter($this->toArray(), 'intval');
    }

    /**
     * Returns interval values as an array where key are the unit names and values the counts
     * from the biggest non-zero one the the smallest non-zero one.
     *
     * @return int[]
     */
    public function getValuesSequence(): array
    {
        $nonZeroValues = $this->getNonZeroValues();

        if ($nonZeroValues === []) {
            return [];
        }

        $keys = array_keys($nonZeroValues);
        $firstKey = $keys[0];
        $lastKey = $keys[\count($keys) - 1];
        $values = [];
        $record = false;

        foreach ($this->toArray() as $unit => $count) {
            if ($unit === $firstKey) {
                $record = true;
            }

            if ($record) {
                $values[$unit] = $count;
            }

            if ($unit === $lastKey) {
                $record = false;
            }
        }

        return $values;
    }

    /**
     * Get the current interval in a human readable format in the current locale.
     *
     * @example
     * ```
     * echo CarbonInterval::fromString('4d 3h 40m')->forHumans() . "\n";
     * echo CarbonInterval::fromString('4d 3h 40m')->forHumans(['parts' => 2]) . "\n";
     * echo CarbonInterval::fromString('4d 3h 40m')->forHumans(['parts' => 3, 'join' => true]) . "\n";
     * echo CarbonInterval::fromString('4d 3h 40m')->forHumans(['short' => true]) . "\n";
     * echo CarbonInterval::fromString('1d 24h')->forHumans(['join' => ' or ']) . "\n";
     * echo CarbonInterval::fromString('1d 24h')->forHumans(['minimumUnit' => 'hour']) . "\n";
     * ```
     *
     * @param int|array $syntax  if array passed, parameters will be extracted from it, the array may contain:
     *                           ⦿ 'syntax' entry (see below)
     *                           ⦿ 'short' entry (see below)
     *                           ⦿ 'parts' entry (see below)
     *                           ⦿ 'options' entry (see below)
     *                           ⦿ 'skip' entry, list of units to skip (array of strings or a single string,
     *                           ` it can be the unit name (singular or plural) or its shortcut
     *                           ` (y, m, w, d, h, min, s, ms, µs).
     *                           ⦿ 'aUnit' entry, prefer "an hour" over "1 hour" if true
     *                           ⦿ 'altNumbers' entry, use alternative numbers if available
     *                           ` (from the current language if true is passed, from the given language(s)
     *                           ` if array or string is passed)
     *                           ⦿ 'join' entry determines how to join multiple parts of the string
     *                           `  - if $join is a string, it's used as a joiner glue
     *                           `  - if $join is a callable/closure, it get the list of string and should return a string
     *                           `  - if $join is an array, the first item will be the default glue, and the second item
     *                           `    will be used instead of the glue for the last item
     *                           `  - if $join is true, it will be guessed from the locale ('list' translation file entry)
     *                           `  - if $join is missing, a space will be used as glue
     *                           ⦿ 'minimumUnit' entry determines the smallest unit of time to display can be long or
     *                           `  short form of the units, e.g. 'hour' or 'h' (default value: s)
     *                           ⦿ 'locale' language in which the diff should be output (has no effect if 'translator' key is set)
     *                           ⦿ 'translator' a custom translator to use to translator the output.
     *                           if int passed, it adds modifiers:
     *                           Possible values:
     *                           - CarbonInterface::DIFF_ABSOLUTE          no modifiers
     *                           - CarbonInterface::DIFF_RELATIVE_TO_NOW   add ago/from now modifier
     *                           - CarbonInterface::DIFF_RELATIVE_TO_OTHER add before/after modifier
     *                           Default value: CarbonInterface::DIFF_ABSOLUTE
     * @param bool      $short   displays short format of time units
     * @param int       $parts   maximum number of parts to display (default value: -1: no limits)
     * @param int       $options human diff options
     *
     * @throws Exception
     *
     * @return string
     */
    public function forHumans($syntax = null, $short = false, $parts = self::NO_LIMIT, $options = null): string
    {
        /* @var TranslatorInterface|null $translator */
        [$syntax, $short, $parts, $options, $join, $aUnit, $altNumbers, $interpolations, $minimumUnit, $skip, $translator] = $this
            ->getForHumansParameters($syntax, $short, $parts, $options);

        $interval = [];

        $syntax = (int) ($syntax ?? CarbonInterface::DIFF_ABSOLUTE);
        $absolute = $syntax === CarbonInterface::DIFF_ABSOLUTE;
        $relativeToNow = $syntax === CarbonInterface::DIFF_RELATIVE_TO_NOW;
        $count = 1;
        $unit = $short ? 's' : 'second';
        $isFuture = $this->invert === 1;
        $transId = $relativeToNow ? ($isFuture ? 'from_now' : 'ago') : ($isFuture ? 'after' : 'before');
        $declensionMode = null;

        $translator ??= $this->getLocalTranslator();

        $handleDeclensions = function ($unit, $count, $index = 0, $parts = 1) use ($interpolations, $transId, $translator, $altNumbers, $absolute, &$declensionMode) {
            if (!$absolute) {
                $declensionMode = $declensionMode ?? $this->translate($transId.'_mode');

                if ($this->needsDeclension($declensionMode, $index, $parts)) {
                    // Some languages have special pluralization for past and future tense.
                    $key = $unit.'_'.$transId;
                    $result = $this->translate($key, $interpolations, $count, $translator, $altNumbers);

                    if ($result !== $key) {
                        return $result;
                    }
                }
            }

            $result = $this->translate($unit, $interpolations, $count, $translator, $altNumbers);

            if ($result !== $unit) {
                return $result;
            }

            return null;
        };

        $intervalValues = $this;
        $method = static::getRoundingMethodFromOptions($options);

        if ($method) {
            $previousCount = INF;

            while (
                \count($intervalValues->getNonZeroValues()) > $parts &&
                ($count = \count($keys = array_keys($intervalValues->getValuesSequence()))) > 1
            ) {
                $index = min($count, $previousCount - 1) - 2;

                if ($index < 0) {
                    break;
                }

                $intervalValues = $this->copy()->roundUnit(
                    $keys[$index],
                    1,
                    $method,
                );
                $previousCount = $count;
            }
        }

        $diffIntervalArray = [
            ['value' => $intervalValues->years,             'unit' => 'year',        'unitShort' => 'y'],
            ['value' => $intervalValues->months,            'unit' => 'month',       'unitShort' => 'm'],
            ['value' => $intervalValues->weeks,             'unit' => 'week',        'unitShort' => 'w'],
            ['value' => $intervalValues->daysExcludeWeeks,  'unit' => 'day',         'unitShort' => 'd'],
            ['value' => $intervalValues->hours,             'unit' => 'hour',        'unitShort' => 'h'],
            ['value' => $intervalValues->minutes,           'unit' => 'minute',      'unitShort' => 'min'],
            ['value' => $intervalValues->seconds,           'unit' => 'second',      'unitShort' => 's'],
            ['value' => $intervalValues->milliseconds,      'unit' => 'millisecond', 'unitShort' => 'ms'],
            ['value' => $intervalValues->microExcludeMilli, 'unit' => 'microsecond', 'unitShort' => 'µs'],
        ];

        if (!empty($skip)) {
            foreach ($diffIntervalArray as $index => &$unitData) {
                $nextIndex = $index + 1;

                if ($unitData['value'] &&
                    isset($diffIntervalArray[$nextIndex]) &&
                    \count(array_intersect([$unitData['unit'], $unitData['unit'].'s', $unitData['unitShort']], $skip))
                ) {
                    $diffIntervalArray[$nextIndex]['value'] += $unitData['value'] *
                        self::getFactorWithDefault($diffIntervalArray[$nextIndex]['unit'], $unitData['unit']);
                    $unitData['value'] = 0;
                }
            }
        }

        $transChoice = function ($short, $unitData, $index, $parts) use ($absolute, $handleDeclensions, $translator, $aUnit, $altNumbers, $interpolations) {
            $count = $unitData['value'];

            if ($short) {
                $result = $handleDeclensions($unitData['unitShort'], $count, $index, $parts);

                if ($result !== null) {
                    return $result;
                }
            } elseif ($aUnit) {
                $result = $handleDeclensions('a_'.$unitData['unit'], $count, $index, $parts);

                if ($result !== null) {
                    return $result;
                }
            }

            if (!$absolute) {
                return $handleDeclensions($unitData['unit'], $count, $index, $parts);
            }

            return $this->translate($unitData['unit'], $interpolations, $count, $translator, $altNumbers);
        };

        $fallbackUnit = ['second', 's'];

        foreach ($diffIntervalArray as $diffIntervalData) {
            if ($diffIntervalData['value'] > 0) {
                $unit = $short ? $diffIntervalData['unitShort'] : $diffIntervalData['unit'];
                $count = $diffIntervalData['value'];
                $interval[] = [$short, $diffIntervalData];
            } elseif ($options & CarbonInterface::SEQUENTIAL_PARTS_ONLY && \count($interval) > 0) {
                break;
            }

            // break the loop after we get the required number of parts in array
            if (\count($interval) >= $parts) {
                break;
            }

            // break the loop after we have reached the minimum unit
            if (\in_array($minimumUnit, [$diffIntervalData['unit'], $diffIntervalData['unitShort']], true)) {
                $fallbackUnit = [$diffIntervalData['unit'], $diffIntervalData['unitShort']];

                break;
            }
        }

        $actualParts = \count($interval);

        foreach ($interval as $index => &$item) {
            $item = $transChoice($item[0], $item[1], $index, $actualParts);
        }

        if (\count($interval) === 0) {
            if ($relativeToNow && $options & CarbonInterface::JUST_NOW) {
                $key = 'diff_now';
                $translation = $this->translate($key, $interpolations, null, $translator);

                if ($translation !== $key) {
                    return $translation;
                }
            }

            $count = $options & CarbonInterface::NO_ZERO_DIFF ? 1 : 0;
            $unit = $fallbackUnit[$short ? 1 : 0];
            $interval[] = $this->translate($unit, $interpolations, $count, $translator, $altNumbers);
        }

        // join the interval parts by a space
        $time = $join($interval);

        unset($diffIntervalArray, $interval);

        if ($absolute) {
            return $time;
        }

        $isFuture = $this->invert === 1;

        $transId = $relativeToNow ? ($isFuture ? 'from_now' : 'ago') : ($isFuture ? 'after' : 'before');

        if ($parts === 1) {
            if ($relativeToNow && $unit === 'day') {
                $specialTranslations = static::SPECIAL_TRANSLATIONS[$count] ?? null;

                if ($specialTranslations && $options & $specialTranslations['option']) {
                    $key = $specialTranslations[$isFuture ? 'future' : 'past'];
                    $translation = $this->translate($key, $interpolations, null, $translator);

                    if ($translation !== $key) {
                        return $translation;
                    }
                }
            }

            $aTime = $aUnit ? $handleDeclensions('a_'.$unit, $count) : null;

            $time = $aTime ?: $handleDeclensions($unit, $count) ?: $time;
        }

        $time = [':time' => $time];

        return $this->translate($transId, array_merge($time, $interpolations, $time), null, $translator);
    }

    public function format(string $format): string
    {
        $output = parent::format($format);

        if (!str_contains($format, '%a') || !isset($this->startDate, $this->endDate)) {
            return $output;
        }

        $this->rawInterval ??= $this->startDate->diffAsDateInterval($this->endDate);

        return str_replace('(unknown)', $this->rawInterval->format('%a'), $output);
    }

    /**
     * Format the instance as a string using the forHumans() function.
     *
     * @throws Exception
     *
     * @return string
     */
    public function __toString(): string
    {
        $format = $this->localToStringFormat
            ?? $this->getFactory()->getSettings()['toStringFormat']
            ?? null;

        if (!$format) {
            return $this->forHumans();
        }

        if ($format instanceof Closure) {
            return $format($this);
        }

        return $this->format($format);
    }

    /**
     * Return native DateInterval PHP object matching the current instance.
     *
     * @example
     * ```
     * var_dump(CarbonInterval::hours(2)->toDateInterval());
     * ```
     *
     * @return DateInterval
     */
    public function toDateInterval(): DateInterval
    {
        return self::castIntervalToClass($this, DateInterval::class);
    }

    /**
     * Convert the interval to a CarbonPeriod.
     *
     * @param DateTimeInterface|string|int ...$params Start date, [end date or recurrences] and optional settings.
     *
     * @return CarbonPeriod
     */
    public function toPeriod(...$params): CarbonPeriod
    {
        if ($this->timezoneSetting) {
            $timeZone = \is_string($this->timezoneSetting)
                ? new DateTimeZone($this->timezoneSetting)
                : $this->timezoneSetting;

            if ($timeZone instanceof DateTimeZone) {
                array_unshift($params, $timeZone);
            }
        }

        $class = ($params[0] ?? null) instanceof DateTime ? CarbonPeriod::class : CarbonPeriodImmutable::class;

        return $class::create($this, ...$params);
    }

    /**
     * Decompose the current interval into
     *
     * @param mixed|int|DateInterval|string|Closure|Unit|null $interval interval or number of the given $unit
     * @param Unit|string|null                                $unit     if specified, $interval must be an integer
     *
     * @return CarbonPeriod
     */
    public function stepBy($interval, Unit|string|null $unit = null): CarbonPeriod
    {
        $this->checkStartAndEnd();
        $start = $this->startDate ?? CarbonImmutable::make('now');
        $end = $this->endDate ?? $start->copy()->add($this);

        try {
            $step = static::make($interval, $unit);
        } catch (InvalidFormatException $exception) {
            if ($unit || (\is_string($interval) ? preg_match('/(\s|\d)/', $interval) : !($interval instanceof Unit))) {
                throw $exception;
            }

            $step = static::make(1, $interval);
        }

        $class = $start instanceof DateTime ? CarbonPeriod::class : CarbonPeriodImmutable::class;

        return $class::create($step, $start, $end);
    }

    /**
     * Invert the interval.
     *
     * @param bool|int $inverted if a parameter is passed, the passed value cast as 1 or 0 is used
     *                           as the new value of the ->invert property.
     *
     * @return $this
     */
    public function invert($inverted = null): static
    {
        $this->invert = (\func_num_args() === 0 ? !$this->invert : $inverted) ? 1 : 0;

        return $this;
    }

    protected function solveNegativeInterval(): static
    {
        if (!$this->isEmpty() && $this->years <= 0 && $this->months <= 0 && $this->dayz <= 0 && $this->hours <= 0 && $this->minutes <= 0 && $this->seconds <= 0 && $this->microseconds <= 0) {
            $this->years *= self::NEGATIVE;
            $this->months *= self::NEGATIVE;
            $this->dayz *= self::NEGATIVE;
            $this->hours *= self::NEGATIVE;
            $this->minutes *= self::NEGATIVE;
            $this->seconds *= self::NEGATIVE;
            $this->microseconds *= self::NEGATIVE;
            $this->invert();
        }

        return $this;
    }

    /**
     * Add the passed interval to the current instance.
     *
     * @param string|DateInterval $unit
     * @param int|float           $value
     *
     * @return $this
     */
    public function add($unit, $value = 1): static
    {
        if (is_numeric($unit)) {
            [$value, $unit] = [$unit, $value];
        }

        if (\is_string($unit) && !preg_match('/^\s*-?\d/', $unit)) {
            $unit = "$value $unit";
            $value = 1;
        }

        $interval = static::make($unit);

        if (!$interval) {
            throw new InvalidIntervalException('This type of data cannot be added/subtracted.');
        }

        if ($value !== 1) {
            $interval->times($value);
        }

        $sign = ($this->invert === 1) !== ($interval->invert === 1) ? self::NEGATIVE : self::POSITIVE;
        $this->years += $interval->y * $sign;
        $this->months += $interval->m * $sign;
        $this->dayz += ($interval->days === false ? $interval->d : $interval->days) * $sign;
        $this->hours += $interval->h * $sign;
        $this->minutes += $interval->i * $sign;
        $this->seconds += $interval->s * $sign;
        $this->microseconds += $interval->microseconds * $sign;

        $this->solveNegativeInterval();

        return $this;
    }

    /**
     * Subtract the passed interval to the current instance.
     *
     * @param string|DateInterval $unit
     * @param int|float           $value
     *
     * @return $this
     */
    public function sub($unit, $value = 1): static
    {
        if (is_numeric($unit)) {
            [$value, $unit] = [$unit, $value];
        }

        return $this->add($unit, -(float) $value);
    }

    /**
     * Subtract the passed interval to the current instance.
     *
     * @param string|DateInterval $unit
     * @param int|float           $value
     *
     * @return $this
     */
    public function subtract($unit, $value = 1): static
    {
        return $this->sub($unit, $value);
    }

    /**
     * Add given parameters to the current interval.
     *
     * @param int       $years
     * @param int       $months
     * @param int|float $weeks
     * @param int|float $days
     * @param int|float $hours
     * @param int|float $minutes
     * @param int|float $seconds
     * @param int|float $microseconds
     *
     * @return $this
     */
    public function plus(
        $years = 0,
        $months = 0,
        $weeks = 0,
        $days = 0,
        $hours = 0,
        $minutes = 0,
        $seconds = 0,
        $microseconds = 0
    ): static {
        return $this->add("
            $years years $months months $weeks weeks $days days
            $hours hours $minutes minutes $seconds seconds $microseconds microseconds
        ");
    }

    /**
     * Add given parameters to the current interval.
     *
     * @param int       $years
     * @param int       $months
     * @param int|float $weeks
     * @param int|float $days
     * @param int|float $hours
     * @param int|float $minutes
     * @param int|float $seconds
     * @param int|float $microseconds
     *
     * @return $this
     */
    public function minus(
        $years = 0,
        $months = 0,
        $weeks = 0,
        $days = 0,
        $hours = 0,
        $minutes = 0,
        $seconds = 0,
        $microseconds = 0
    ): static {
        return $this->sub("
            $years years $months months $weeks weeks $days days
            $hours hours $minutes minutes $seconds seconds $microseconds microseconds
        ");
    }

    /**
     * Multiply current instance given number of times. times() is naive, it multiplies each unit
     * (so day can be greater than 31, hour can be greater than 23, etc.) and the result is rounded
     * separately for each unit.
     *
     * Use times() when you want a fast and approximated calculation that does not cascade units.
     *
     * For a precise and cascaded calculation,
     *
     * @see multiply()
     *
     * @param float|int $factor
     *
     * @return $this
     */
    public function times($factor): static
    {
        if ($factor < 0) {
            $this->invert = $this->invert ? 0 : 1;
            $factor = -$factor;
        }

        $this->years = (int) round($this->years * $factor);
        $this->months = (int) round($this->months * $factor);
        $this->dayz = (int) round($this->dayz * $factor);
        $this->hours = (int) round($this->hours * $factor);
        $this->minutes = (int) round($this->minutes * $factor);
        $this->seconds = (int) round($this->seconds * $factor);
        $this->microseconds = (int) round($this->microseconds * $factor);

        return $this;
    }

    /**
     * Divide current instance by a given divider. shares() is naive, it divides each unit separately
     * and the result is rounded for each unit. So 5 hours and 20 minutes shared by 3 becomes 2 hours
     * and 7 minutes.
     *
     * Use shares() when you want a fast and approximated calculation that does not cascade units.
     *
     * For a precise and cascaded calculation,
     *
     * @see divide()
     *
     * @param float|int $divider
     *
     * @return $this
     */
    public function shares($divider): static
    {
        return $this->times(1 / $divider);
    }

    protected function copyProperties(self $interval, $ignoreSign = false): static
    {
        $this->years = $interval->years;
        $this->months = $interval->months;
        $this->dayz = $interval->dayz;
        $this->hours = $interval->hours;
        $this->minutes = $interval->minutes;
        $this->seconds = $interval->seconds;
        $this->microseconds = $interval->microseconds;

        if (!$ignoreSign) {
            $this->invert = $interval->invert;
        }

        return $this;
    }

    /**
     * Multiply and cascade current instance by a given factor.
     *
     * @param float|int $factor
     *
     * @return $this
     */
    public function multiply($factor): static
    {
        if ($factor < 0) {
            $this->invert = $this->invert ? 0 : 1;
            $factor = -$factor;
        }

        $yearPart = (int) floor($this->years * $factor); // Split calculation to prevent imprecision

        if ($yearPart) {
            $this->years -= $yearPart / $factor;
        }

        return $this->copyProperties(
            static::create($yearPart)
                ->microseconds(abs($this->totalMicroseconds) * $factor)
                ->cascade(),
            true,
        );
    }

    /**
     * Divide and cascade current instance by a given divider.
     *
     * @param float|int $divider
     *
     * @return $this
     */
    public function divide($divider): static
    {
        return $this->multiply(1 / $divider);
    }

    /**
     * Get the interval_spec string of a date interval.
     *
     * @param DateInterval $interval
     *
     * @return string
     */
    public static function getDateIntervalSpec(DateInterval $interval, bool $microseconds = false, array $skip = []): string
    {
        $date = array_filter([
            static::PERIOD_YEARS => abs($interval->y),
            static::PERIOD_MONTHS => abs($interval->m),
            static::PERIOD_DAYS => abs($interval->d),
        ]);

        $skip = array_map([Unit::class, 'toNameIfUnit'], $skip);

        if (
            $interval->days >= CarbonInterface::DAYS_PER_WEEK * CarbonInterface::WEEKS_PER_MONTH &&
            (!isset($date[static::PERIOD_YEARS]) || \count(array_intersect(['y', 'year', 'years'], $skip))) &&
            (!isset($date[static::PERIOD_MONTHS]) || \count(array_intersect(['m', 'month', 'months'], $skip)))
        ) {
            $date = [
                static::PERIOD_DAYS => abs($interval->days),
            ];
        }

        $seconds = abs($interval->s);
        if ($microseconds && $interval->f > 0) {
            $seconds = \sprintf('%d.%06d', $seconds, abs($interval->f) * 1000000);
        }

        $time = array_filter([
            static::PERIOD_HOURS => abs($interval->h),
            static::PERIOD_MINUTES => abs($interval->i),
            static::PERIOD_SECONDS => $seconds,
        ]);

        $specString = static::PERIOD_PREFIX;

        foreach ($date as $key => $value) {
            $specString .= $value.$key;
        }

        if (\count($time) > 0) {
            $specString .= static::PERIOD_TIME_PREFIX;
            foreach ($time as $key => $value) {
                $specString .= $value.$key;
            }
        }

        return $specString === static::PERIOD_PREFIX ? 'PT0S' : $specString;
    }

    /**
     * Get the interval_spec string.
     *
     * @return string
     */
    public function spec(bool $microseconds = false): string
    {
        return static::getDateIntervalSpec($this, $microseconds);
    }

    /**
     * Comparing 2 date intervals.
     *
     * @param DateInterval $first
     * @param DateInterval $second
     *
     * @return int 0, 1 or -1
     */
    public static function compareDateIntervals(DateInterval $first, DateInterval $second): int
    {
        $current = Carbon::now();
        $passed = $current->avoidMutation()->add($second);
        $current->add($first);

        return $current <=> $passed;
    }

    /**
     * Comparing with passed interval.
     *
     * @param DateInterval $interval
     *
     * @return int 0, 1 or -1
     */
    public function compare(DateInterval $interval): int
    {
        return static::compareDateIntervals($this, $interval);
    }

    /**
     * Convert overflowed values into bigger units.
     *
     * @return $this
     */
    public function cascade(): static
    {
        return $this->doCascade(false);
    }

    public function hasNegativeValues(): bool
    {
        foreach ($this->toArray() as $value) {
            if ($value < 0) {
                return true;
            }
        }

        return false;
    }

    public function hasPositiveValues(): bool
    {
        foreach ($this->toArray() as $value) {
            if ($value > 0) {
                return true;
            }
        }

        return false;
    }

    /**
     * Get amount of given unit equivalent to the interval.
     *
     * @param string $unit
     *
     * @throws UnknownUnitException|UnitNotConfiguredException
     *
     * @return float
     */
    public function total(string $unit): float
    {
        $realUnit = $unit = strtolower($unit);

        if (\in_array($unit, ['days', 'weeks'])) {
            $realUnit = 'dayz';
        } elseif (!\in_array($unit, ['microseconds', 'milliseconds', 'seconds', 'minutes', 'hours', 'dayz', 'months', 'years'])) {
            throw new UnknownUnitException($unit);
        }

        $this->checkStartAndEnd();

        if ($this->startDate && $this->endDate) {
            $diff = $this->startDate->diffInUnit($unit, $this->endDate);

            return $this->absolute ? abs($diff) : $diff;
        }

        $result = 0;
        $cumulativeFactor = 0;
        $unitFound = false;
        $factors = self::getFlipCascadeFactors();
        $daysPerWeek = (int) static::getDaysPerWeek();

        $values = [
            'years' => $this->years,
            'months' => $this->months,
            'weeks' => (int) ($this->d / $daysPerWeek),
            'dayz' => fmod($this->d, $daysPerWeek),
            'hours' => $this->hours,
            'minutes' => $this->minutes,
            'seconds' => $this->seconds,
            'milliseconds' => (int) ($this->microseconds / Carbon::MICROSECONDS_PER_MILLISECOND),
            'microseconds' => $this->microseconds % Carbon::MICROSECONDS_PER_MILLISECOND,
        ];

        if (isset($factors['dayz']) && $factors['dayz'][0] !== 'weeks') {
            $values['dayz'] += $values['weeks'] * $daysPerWeek;
            $values['weeks'] = 0;
        }

        foreach ($factors as $source => [$target, $factor]) {
            if ($source === $realUnit) {
                $unitFound = true;
                $value = $values[$source];
                $result += $value;
                $cumulativeFactor = 1;
            }

            if ($factor === false) {
                if ($unitFound) {
                    break;
                }

                $result = 0;
                $cumulativeFactor = 0;

                continue;
            }

            if ($target === $realUnit) {
                $unitFound = true;
            }

            if ($cumulativeFactor) {
                $cumulativeFactor *= $factor;
                $result += $values[$target] * $cumulativeFactor;

                continue;
            }

            $value = $values[$source];

            $result = ($result + $value) / $factor;
        }

        if (isset($target) && !$cumulativeFactor) {
            $result += $values[$target];
        }

        if (!$unitFound) {
            throw new UnitNotConfiguredException($unit);
        }

        if ($this->invert) {
            $result *= self::NEGATIVE;
        }

        if ($unit === 'weeks') {
            $result /= $daysPerWeek;
        }

        // Cast as int numbers with no decimal part
        return fmod($result, 1) === 0.0 ? (int) $result : $result;
    }

    /**
     * Determines if the instance is equal to another
     *
     * @param CarbonInterval|DateInterval|mixed $interval
     *
     * @see equalTo()
     *
     * @return bool
     */
    public function eq($interval): bool
    {
        return $this->equalTo($interval);
    }

    /**
     * Determines if the instance is equal to another
     *
     * @param CarbonInterval|DateInterval|mixed $interval
     *
     * @return bool
     */
    public function equalTo($interval): bool
    {
        $interval = $this->resolveInterval($interval);

        if ($interval === null) {
            return false;
        }

        $step = $this->getStep();

        if ($step) {
            return $step === $interval->getStep();
        }

        if ($this->isEmpty()) {
            return $interval->isEmpty();
        }

        $cascadedInterval = $this->copy()->cascade();
        $comparedInterval = $interval->copy()->cascade();

        return $cascadedInterval->invert === $comparedInterval->invert &&
            $cascadedInterval->getNonZeroValues() === $comparedInterval->getNonZeroValues();
    }

    /**
     * Determines if the instance is not equal to another
     *
     * @param CarbonInterval|DateInterval|mixed $interval
     *
     * @see notEqualTo()
     *
     * @return bool
     */
    public function ne($interval): bool
    {
        return $this->notEqualTo($interval);
    }

    /**
     * Determines if the instance is not equal to another
     *
     * @param CarbonInterval|DateInterval|mixed $interval
     *
     * @return bool
     */
    public function notEqualTo($interval): bool
    {
        return !$this->eq($interval);
    }

    /**
     * Determines if the instance is greater (longer) than another
     *
     * @param CarbonInterval|DateInterval|mixed $interval
     *
     * @see greaterThan()
     *
     * @return bool
     */
    public function gt($interval): bool
    {
        return $this->greaterThan($interval);
    }

    /**
     * Determines if the instance is greater (longer) than another
     *
     * @param CarbonInterval|DateInterval|mixed $interval
     *
     * @return bool
     */
    public function greaterThan($interval): bool
    {
        $interval = $this->resolveInterval($interval);

        return $interval === null || $this->totalMicroseconds > $interval->totalMicroseconds;
    }

    /**
     * Determines if the instance is greater (longer) than or equal to another
     *
     * @param CarbonInterval|DateInterval|mixed $interval
     *
     * @see greaterThanOrEqualTo()
     *
     * @return bool
     */
    public function gte($interval): bool
    {
        return $this->greaterThanOrEqualTo($interval);
    }

    /**
     * Determines if the instance is greater (longer) than or equal to another
     *
     * @param CarbonInterval|DateInterval|mixed $interval
     *
     * @return bool
     */
    public function greaterThanOrEqualTo($interval): bool
    {
        return $this->greaterThan($interval) || $this->equalTo($interval);
    }

    /**
     * Determines if the instance is less (shorter) than another
     *
     * @param CarbonInterval|DateInterval|mixed $interval
     *
     * @see lessThan()
     *
     * @return bool
     */
    public function lt($interval): bool
    {
        return $this->lessThan($interval);
    }

    /**
     * Determines if the instance is less (shorter) than another
     *
     * @param CarbonInterval|DateInterval|mixed $interval
     *
     * @return bool
     */
    public function lessThan($interval): bool
    {
        $interval = $this->resolveInterval($interval);

        return $interval !== null && $this->totalMicroseconds < $interval->totalMicroseconds;
    }

    /**
     * Determines if the instance is less (shorter) than or equal to another
     *
     * @param CarbonInterval|DateInterval|mixed $interval
     *
     * @see lessThanOrEqualTo()
     *
     * @return bool
     */
    public function lte($interval): bool
    {
        return $this->lessThanOrEqualTo($interval);
    }

    /**
     * Determines if the instance is less (shorter) than or equal to another
     *
     * @param CarbonInterval|DateInterval|mixed $interval
     *
     * @return bool
     */
    public function lessThanOrEqualTo($interval): bool
    {
        return $this->lessThan($interval) || $this->equalTo($interval);
    }

    /**
     * Determines if the instance is between two others.
     *
     * The third argument allow you to specify if bounds are included or not (true by default)
     * but for when you including/excluding bounds may produce different results in your application,
     * we recommend to use the explicit methods ->betweenIncluded() or ->betweenExcluded() instead.
     *
     * @example
     * ```
     * CarbonInterval::hours(48)->between(CarbonInterval::day(), CarbonInterval::days(3)); // true
     * CarbonInterval::hours(48)->between(CarbonInterval::day(), CarbonInterval::hours(36)); // false
     * CarbonInterval::hours(48)->between(CarbonInterval::day(), CarbonInterval::days(2)); // true
     * CarbonInterval::hours(48)->between(CarbonInterval::day(), CarbonInterval::days(2), false); // false
     * ```
     *
     * @param CarbonInterval|DateInterval|mixed $interval1
     * @param CarbonInterval|DateInterval|mixed $interval2
     * @param bool                              $equal     Indicates if an equal to comparison should be done
     *
     * @return bool
     */
    public function between($interval1, $interval2, bool $equal = true): bool
    {
        return $equal
            ? $this->greaterThanOrEqualTo($interval1) && $this->lessThanOrEqualTo($interval2)
            : $this->greaterThan($interval1) && $this->lessThan($interval2);
    }

    /**
     * Determines if the instance is between two others, bounds excluded.
     *
     * @example
     * ```
     * CarbonInterval::hours(48)->betweenExcluded(CarbonInterval::day(), CarbonInterval::days(3)); // true
     * CarbonInterval::hours(48)->betweenExcluded(CarbonInterval::day(), CarbonInterval::hours(36)); // false
     * CarbonInterval::hours(48)->betweenExcluded(CarbonInterval::day(), CarbonInterval::days(2)); // true
     * ```
     *
     * @param CarbonInterval|DateInterval|mixed $interval1
     * @param CarbonInterval|DateInterval|mixed $interval2
     *
     * @return bool
     */
    public function betweenIncluded($interval1, $interval2): bool
    {
        return $this->between($interval1, $interval2, true);
    }

    /**
     * Determines if the instance is between two others, bounds excluded.
     *
     * @example
     * ```
     * CarbonInterval::hours(48)->betweenExcluded(CarbonInterval::day(), CarbonInterval::days(3)); // true
     * CarbonInterval::hours(48)->betweenExcluded(CarbonInterval::day(), CarbonInterval::hours(36)); // false
     * CarbonInterval::hours(48)->betweenExcluded(CarbonInterval::day(), CarbonInterval::days(2)); // false
     * ```
     *
     * @param CarbonInterval|DateInterval|mixed $interval1
     * @param CarbonInterval|DateInterval|mixed $interval2
     *
     * @return bool
     */
    public function betweenExcluded($interval1, $interval2): bool
    {
        return $this->between($interval1, $interval2, false);
    }

    /**
     * Determines if the instance is between two others
     *
     * @example
     * ```
     * CarbonInterval::hours(48)->isBetween(CarbonInterval::day(), CarbonInterval::days(3)); // true
     * CarbonInterval::hours(48)->isBetween(CarbonInterval::day(), CarbonInterval::hours(36)); // false
     * CarbonInterval::hours(48)->isBetween(CarbonInterval::day(), CarbonInterval::days(2)); // true
     * CarbonInterval::hours(48)->isBetween(CarbonInterval::day(), CarbonInterval::days(2), false); // false
     * ```
     *
     * @param CarbonInterval|DateInterval|mixed $interval1
     * @param CarbonInterval|DateInterval|mixed $interval2
     * @param bool                              $equal     Indicates if an equal to comparison should be done
     *
     * @return bool
     */
    public function isBetween($interval1, $interval2, bool $equal = true): bool
    {
        return $this->between($interval1, $interval2, $equal);
    }

    /**
     * Round the current instance at the given unit with given precision if specified and the given function.
     *
     * @throws Exception
     */
    public function roundUnit(string $unit, DateInterval|string|int|float $precision = 1, string $function = 'round'): static
    {
        if (static::getCascadeFactors() !== static::getDefaultCascadeFactors()) {
            $value = $function($this->total($unit) / $precision) * $precision;
            $inverted = $value < 0;

            return $this->copyProperties(self::fromString(
                number_format(abs($value), 12, '.', '').' '.$unit
            )->invert($inverted)->cascade());
        }

        $base = CarbonImmutable::parse('2000-01-01 00:00:00', 'UTC')
            ->roundUnit($unit, $precision, $function);
        $next = $base->add($this);
        $inverted = $next < $base;

        if ($inverted) {
            $next = $base->sub($this);
        }

        $this->copyProperties(
            $next
                ->roundUnit($unit, $precision, $function)
                ->diff($base),
        );

        return $this->invert($inverted);
    }

    /**
     * Truncate the current instance at the given unit with given precision if specified.
     *
     * @param string                             $unit
     * @param float|int|string|DateInterval|null $precision
     *
     * @throws Exception
     *
     * @return $this
     */
    public function floorUnit(string $unit, $precision = 1): static
    {
        return $this->roundUnit($unit, $precision, 'floor');
    }

    /**
     * Ceil the current instance at the given unit with given precision if specified.
     *
     * @param string                             $unit
     * @param float|int|string|DateInterval|null $precision
     *
     * @throws Exception
     *
     * @return $this
     */
    public function ceilUnit(string $unit, $precision = 1): static
    {
        return $this->roundUnit($unit, $precision, 'ceil');
    }

    /**
     * Round the current instance second with given precision if specified.
     *
     * @param float|int|string|DateInterval|null $precision
     * @param string                             $function
     *
     * @throws Exception
     *
     * @return $this
     */
    public function round($precision = 1, string $function = 'round'): static
    {
        return $this->roundWith($precision, $function);
    }

    /**
     * Round the current instance second with given precision if specified.
     *
     * @throws Exception
     *
     * @return $this
     */
    public function floor(DateInterval|string|float|int $precision = 1): static
    {
        return $this->round($precision, 'floor');
    }

    /**
     * Ceil the current instance second with given precision if specified.
     *
     * @throws Exception
     *
     * @return $this
     */
    public function ceil(DateInterval|string|float|int $precision = 1): static
    {
        return $this->round($precision, 'ceil');
    }

    public function __unserialize(array $data): void
    {
        $properties = array_combine(
            array_map(
                static fn (mixed $key) => \is_string($key)
                    ? str_replace('tzName', 'timezoneSetting', $key)
                    : $key,
                array_keys($data),
            ),
            $data,
        );

        if (method_exists(parent::class, '__unserialize')) {
            // PHP >= 8.2
            parent::__unserialize($properties);

            return;
        }

        // PHP <= 8.1
        // @codeCoverageIgnoreStart
        foreach ($properties as $property => $value) {
            $name = preg_replace('/^\0.+\0/', '', $property);
            $localStrictMode = $this->localStrictModeEnabled;
            $this->localStrictModeEnabled = false;
            $this->$name = $value;

            if ($name !== 'localStrictModeEnabled') {
                $this->localStrictModeEnabled = $localStrictMode;
            }
        }
        // @codeCoverageIgnoreEnd
    }

    /**
     * @template T
     *
     * @param T     $interval
     * @param mixed $original
     *
     * @return T
     */
    private static function withOriginal(mixed $interval, mixed $original): mixed
    {
        if ($interval instanceof self) {
            $interval->originalInput = $original;
        }

        return $interval;
    }

    private static function standardizeUnit(string $unit): string
    {
        $unit = rtrim($unit, 'sz').'s';

        return $unit === 'days' ? 'dayz' : $unit;
    }

    private static function getFlipCascadeFactors(): array
    {
        if (!self::$flipCascadeFactors) {
            self::$flipCascadeFactors = [];

            foreach (self::getCascadeFactors() as $to => [$factor, $from]) {
                self::$flipCascadeFactors[self::standardizeUnit($from)] = [self::standardizeUnit($to), $factor];
            }
        }

        return self::$flipCascadeFactors;
    }

    /**
     * @template T of DateInterval
     *
     * @param DateInterval $interval
     *
     * @psalm-param class-string<T> $className
     *
     * @return T
     */
    private static function castIntervalToClass(DateInterval $interval, string $className, array $skip = []): object
    {
        $mainClass = DateInterval::class;

        if (!is_a($className, $mainClass, true)) {
            throw new InvalidCastException("$className is not a sub-class of $mainClass.");
        }

        $microseconds = $interval->f;
        $instance = new $className(static::getDateIntervalSpec($interval, false, $skip));

        if ($instance instanceof self) {
            $instance->originalInput = $interval;
        }

        if ($microseconds) {
            $instance->f = $microseconds;
        }

        if ($interval instanceof self && is_a($className, self::class, true)) {
            self::copyStep($interval, $instance);
        }

        self::copyNegativeUnits($interval, $instance);

        return self::withOriginal($instance, $interval);
    }

    private static function copyStep(self $from, self $to): void
    {
        $to->setStep($from->getStep());
    }

    private static function copyNegativeUnits(DateInterval $from, DateInterval $to): void
    {
        $to->invert = $from->invert;

        foreach (['y', 'm', 'd', 'h', 'i', 's'] as $unit) {
            if ($from->$unit < 0) {
                self::setIntervalUnit($to, $unit, $to->$unit * self::NEGATIVE);
            }
        }
    }

    private function invertCascade(array $values): static
    {
        return $this->set(array_map(function ($value) {
            return -$value;
        }, $values))->doCascade(true)->invert();
    }

    private function doCascade(bool $deep): static
    {
        $originalData = $this->toArray();
        $originalData['milliseconds'] = (int) ($originalData['microseconds'] / static::getMicrosecondsPerMillisecond());
        $originalData['microseconds'] = $originalData['microseconds'] % static::getMicrosecondsPerMillisecond();
        $originalData['weeks'] = (int) ($this->d / static::getDaysPerWeek());
        $originalData['daysExcludeWeeks'] = fmod($this->d, static::getDaysPerWeek());
        unset($originalData['days']);
        $newData = $originalData;
        $previous = [];

        foreach (self::getFlipCascadeFactors() as $source => [$target, $factor]) {
            foreach (['source', 'target'] as $key) {
                if ($$key === 'dayz') {
                    $$key = 'daysExcludeWeeks';
                }
            }

            $value = $newData[$source];
            $modulo = fmod($factor + fmod($value, $factor), $factor);
            $newData[$source] = $modulo;
            $newData[$target] += ($value - $modulo) / $factor;

            $decimalPart = fmod($newData[$source], 1);

            if ($decimalPart !== 0.0) {
                $unit = $source;

                foreach ($previous as [$subUnit, $subFactor]) {
                    $newData[$unit] -= $decimalPart;
                    $newData[$subUnit] += $decimalPart * $subFactor;
                    $decimalPart = fmod($newData[$subUnit], 1);

                    if ($decimalPart === 0.0) {
                        break;
                    }

                    $unit = $subUnit;
                }
            }

            array_unshift($previous, [$source, $factor]);
        }

        $positive = null;

        if (!$deep) {
            foreach ($newData as $value) {
                if ($value) {
                    if ($positive === null) {
                        $positive = ($value > 0);

                        continue;
                    }

                    if (($value > 0) !== $positive) {
                        return $this->invertCascade($originalData)
                            ->solveNegativeInterval();
                    }
                }
            }
        }

        return $this->set($newData)
            ->solveNegativeInterval();
    }

    private function needsDeclension(string $mode, int $index, int $parts): bool
    {
        return match ($mode) {
            'last' => $index === $parts - 1,
            default => true,
        };
    }

    private function checkIntegerValue(string $name, mixed $value): void
    {
        if (\is_int($value)) {
            return;
        }

        $this->assertSafeForInteger($name, $value);

        if (\is_float($value) && (((float) (int) $value) === $value)) {
            return;
        }

        if (!self::$floatSettersEnabled) {
            $type = \gettype($value);
            @trigger_error(
                "Since 2.70.0, it's deprecated to pass $type value for $name.\n".
                "It's truncated when stored as an integer interval unit.\n".
                "From 3.0.0, decimal part will no longer be truncated and will be cascaded to smaller units.\n".
                "- To maintain the current behavior, use explicit cast: $name((int) \$value)\n".
                "- To adopt the new behavior globally, call CarbonInterval::enableFloatSetters()\n",
                \E_USER_DEPRECATED,
            );
        }
    }

    /**
     * Throw an exception if precision loss when storing the given value as an integer would be >= 1.0.
     */
    private function assertSafeForInteger(string $name, mixed $value): void
    {
        if ($value && !\is_int($value) && ($value >= 0x7fffffffffffffff || $value <= -0x7fffffffffffffff)) {
            throw new OutOfRangeException($name, -0x7fffffffffffffff, 0x7fffffffffffffff, $value);
        }
    }

    private function handleDecimalPart(string $unit, mixed $value, mixed $integerValue): void
    {
        if (self::$floatSettersEnabled) {
            $floatValue = (float) $value;
            $base = (float) $integerValue;

            if ($floatValue === $base) {
                return;
            }

            $units = [
                'y' => 'year',
                'm' => 'month',
                'd' => 'day',
                'h' => 'hour',
                'i' => 'minute',
                's' => 'second',
            ];
            $upper = true;

            foreach ($units as $property => $name) {
                if ($name === $unit) {
                    $upper = false;

                    continue;
                }

                if (!$upper && $this->$property !== 0) {
                    throw new RuntimeException(
                        "You cannot set $unit to a float value as $name would be overridden, ".
                        'set it first to 0 explicitly if you really want to erase its value'
                    );
                }
            }

            $this->add($unit, $floatValue - $base);
        }
    }

    private function getInnerValues(): array
    {
        return [$this->y, $this->m, $this->d, $this->h, $this->i, $this->s, $this->f, $this->invert, $this->days];
    }

    private function checkStartAndEnd(): void
    {
        if (
            $this->initialValues !== null
            && ($this->startDate !== null || $this->endDate !== null)
            && $this->initialValues !== $this->getInnerValues()
        ) {
            $this->absolute = false;
            $this->startDate = null;
            $this->endDate = null;
            $this->rawInterval = null;
        }
    }

    /** @return $this */
    private function setSetting(string $setting, mixed $value): self
    {
        switch ($setting) {
            case 'timezoneSetting':
                return $value === null ? $this : $this->setTimezone($value);

            case 'step':
                $this->setStep($value);

                return $this;

            case 'localMonthsOverflow':
                return $value === null ? $this : $this->settings(['monthOverflow' => $value]);

            case 'localYearsOverflow':
                return $value === null ? $this : $this->settings(['yearOverflow' => $value]);

            case 'localStrictModeEnabled':
            case 'localHumanDiffOptions':
            case 'localToStringFormat':
            case 'localSerializer':
            case 'localMacros':
            case 'localGenericMacros':
            case 'localFormatFunction':
            case 'localTranslator':
                $this->$setting = $value;

                return $this;

            default:
                // Drop unknown settings
                return $this;
        }
    }

    private static function incrementUnit(DateInterval $instance, string $unit, int $value): void
    {
        if ($value === 0) {
            return;
        }

        if (PHP_VERSION_ID !== 80320) {
            $instance->$unit += $value;

            return;
        }

        // Cannot use +=, nor set to a negative value directly as it segfaults in PHP 8.3.20
        self::setIntervalUnit($instance, $unit, ($instance->$unit ?? 0) + $value);
    }

    private static function setIntervalUnit(DateInterval $instance, string $unit, mixed $value): void
    {
        switch ($unit) {
            case 'y':
                $instance->y = $value;

                break;

            case 'm':
                $instance->m = $value;

                break;

            case 'd':
                $instance->d = $value;

                break;

            case 'h':
                $instance->h = $value;

                break;

            case 'i':
                $instance->i = $value;

                break;

            case 's':
                $instance->s = $value;

                break;

            default:
                $instance->$unit = $value;
        }
    }
}