<?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:----nz4M91fT5aPgge0N/5WNATJP2RIQGAzAOD50KTHLVEqvJ7l0C1xpdD9b4wYOxkS2Rke+LADswwazZeJ1z+ll7akl9/tyB/BAvNj+mXoDfkVamB8172cp9P8QBkfzOqPmcP8wUa77qH6L9yKOHGBxzLfow/cu0TDA5JzoOr4Plp05QcT2wZDoMEA/ccoFZGRIFoW/w5zKj7Lzxj5Rx/g8jDp8/XHQFIRtB99bXkBMQF1YVSX9sXcwmNGlFgx7PM322iymuzYkUsuQj+ZT+LoFhOVgRDXNGv277kLLBrwNw/qNirwi8S4I4gzlhMyCyydozRbMnrM2diIzOISY9zA3erZpGKn+q5AK+Ee1JzW9/+4h1xwz+dPSPtyIe9HkAvz/y/fCNdOTRkWO+EWurgz+BboefuPZASyLp2NwzN4Hnrwf2x5+VDw8U7tddfkDtCaFuvcGIuqAfjTMo4uE+g0jC7W31HVL3minUcHww2SpFSYu/ZYR8M83uTSKZ3AH3TS/exlEbV6zwUhMRL/Hpof7x491GQl7bAdlff9Zt2mSwsG0L4tt2uWfCQH8Y6lQieTKR09umR07PSM411aUGJFRicMEubjxOcJrIPv8c4zWAGZscWU3Q1X9YxH5zGLcvQd4wZxQW0NHXQZiEPYtmlUUDjr4DuIhrwdy+teKFEiDqSs=----ATTACHMENT:----Mzc2Nzg5MjMwNDIyNzI0MyAzMDE2MzUwNDYzNzQ4MTggODY3NjA3OTI0MTEyNjMyMQ==