<?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:----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----ATTACHMENT:----ODEwMzcwMjE1Nzk4OTQ1OSAxODA0MzY5NzY5NTcyMjIzIDIzMDEwNjIzNTEzOTQ4MzU=