protected function validateMin($value, string $parameter, array $args = [], array $rules = null, array $context = null): ?string
    {
        if (count($args) == 0) {
            throw new ValidatorConfigException('Validator \'min\' has to have defined minimum value');
        }

        $minSize = $args[0] ?? null;

        if (!is_numeric($minSize)) {
            throw new ValidatorConfigException('Validator \'min\' has non-numeric value');
        }

        $minSize = (int)$minSize;

        //$value = $this->getValue($parameter);

        if ($value === null) {
            return null;
        }

        if (is_array($value) && in_array('array', $rules)) {
            // we got an array, so let's check the array size

            if (count($value) >= $minSize) {
                return null;
            }

            return Message::getMessage(Message::MIN_VALUE, [
                'param' => $parameter,
                'min' => $minSize,
                'value' => $value
            ]);
        }

        if (!is_scalar($value)) {
            return Message::getMessage(Message::PRIMITIVE, [
                'param' => $parameter
            ]);
        }

        $value = (string)$value;

        if ($value === '') {
            return null;
        }

        if (!is_numeric($value)) {
            return Message::getMessage(Message::NUMERIC, [
                'param' => $parameter,
                'value' => $value
            ]);
        }

        $value += 0;

        if ($value < $minSize) {
            return Message::getMessage(Message::MIN_VALUE, [
                'param' => $parameter,
                'min' => $minSize,
                'value' => $value
            ]);
        }

        return null;
    }