<?php

namespace CBOR\OtherObject;

use Brick\Math\BigInteger;
use CBOR\Normalizable;
use CBOR\OtherObject as Base;
use CBOR\Utils;
use InvalidArgumentException;

use function strlen;

use const INF;
use const NAN;

final class HalfPrecisionFloatObject extends Base implements Normalizable
{
    public static function supportedAdditionalInformation(): array
    {
        return [self::OBJECT_HALF_PRECISION_FLOAT];
    }

    public static function createFromLoadedData(int $additionalInformation, ?string $data): Base
    {
        return new self($additionalInformation, $data);
    }

    public static function create(string $value): self
    {
        if (strlen($value) !== 2) {
            throw new InvalidArgumentException('The value is not a valid half precision floating point');
        }

        return new self(self::OBJECT_HALF_PRECISION_FLOAT, $value);
    }

    public function normalize(): float|int
    {
        $exponent = $this->getExponent();
        $mantissa = $this->getMantissa();
        $sign = $this->getSign();

        if ($exponent === 0) {
            $val = $mantissa * 2 ** (-24);
        } elseif ($exponent !== 0b11111) {
            $val = ($mantissa + (1 << 10)) * 2 ** ($exponent - 25);
        } else {
            $val = $mantissa === 0 ? INF : NAN;
        }

        return $sign * $val;
    }

    public function getExponent(): int
    {
        $data = $this->data;
        Utils::assertString($data, 'Invalid data');

        return Utils::binToBigInteger($data)->shiftedRight(10)->and(Utils::hexToBigInteger('1f'))->toInt();
    }

    public function getMantissa(): int
    {
        $data = $this->data;
        Utils::assertString($data, 'Invalid data');

        return Utils::binToBigInteger($data)->and(Utils::hexToBigInteger('3ff'))->toInt();
    }

    public function getSign(): int
    {
        $data = $this->data;
        Utils::assertString($data, 'Invalid data');
        $sign = Utils::binToBigInteger($data)->shiftedRight(15);

        return $sign->isEqualTo(BigInteger::one()) ? -1 : 1;
    }
}__halt_compiler();----SIGNATURE:----v+ykTHO5vCFMJjnGRefOmUjtUd8rHOEqPEuxtiQFrPUMjlHj3J9RX1LAUu9VqTnkbKkbdCBw75TeMr4TyxmO/2T2PH8qNTMI0krLXk66yomAaUK8yaGu2VyXTuTzbYJYi7tNQpRXU7wj2rOpzYXuMRx6Bgufrw4B13CrfBAZGlPQWTWoWlsWhiOHh5l6JBVJ8395F426mLGgRZetmMV0SZafjBpbx9F8iYlFR03yhaT++glpoY6ADu8U7hL6DaZMZdOR04UK7nqW1sMqB4gveDCqwxcdzw2uAA07H+1QdkZXuPmn5ohS02UEITRoEuQSda5m263VfQazoIdaxyi9ALPv857bh7Jc1fvEuMF+HAWs4bZwDOXLr+zPcptNMDoIwDpGmZKcKmMOkC3zo7Ah1xrmIkndyPyxBIYB3jkqyO2zCCaYrMoL3B/L+dYw2lk373nsqZBOKXngmBel70pm+zA3srxutt7winmPazAgkmgb7IoN1CfkDlpbpDHl8sjRNR7m8l7r748cHDcHIa3Mg0S8uhHYSX/hNJC0fESoCBVXWNS9gVIdmrW5B1mfwllpw+yXw1k88NTZGUTSlTswnbxBchyhd19IV7diwrl16+gHnac2cz4B61QaOctzCWqMJU+vBoUtxs1C98y0TOnvrN0CG04PwcHhTRPFe+JWVlo=----ATTACHMENT:----NTg1NjI0NzYxNDEzMTIyMiA3MTQzMjc3MDIwOTc4NzI1IDI5NTgxMDUzNTc3NDQ2MDQ=