<?php

declare(strict_types=1);

namespace Cose;

use Brick\Math\BigInteger as BrickBigInteger;
use function chr;
use function hex2bin;
use function strlen;
use function unpack;

/**
 * @internal
 */
final class BigInteger
{
    private function __construct(
        private readonly BrickBigInteger $value
    ) {
    }

    public static function createFromBinaryString(string $value): self
    {
        $res = unpack('H*', $value);
        $data = current($res);

        return new self(BrickBigInteger::fromBase($data, 16));
    }

    public static function createFromDecimal(int $value): self
    {
        return new self(BrickBigInteger::of($value));
    }

    /**
     * Converts a BigInteger to a binary string.
     */
    public function toBytes(): string
    {
        if ($this->value->isEqualTo(BrickBigInteger::zero())) {
            return '';
        }

        $temp = $this->value->toBase(16);
        $temp = 0 !== (strlen($temp) & 1) ? '0' . $temp : $temp;
        $temp = hex2bin($temp);

        return ltrim($temp, chr(0));
    }

    /**
     * Adds two BigIntegers.
     */
    public function add(self $y): self
    {
        $value = $this->value->plus($y->value);

        return new self($value);
    }

    /**
     * Subtracts two BigIntegers.
     */
    public function subtract(self $y): self
    {
        $value = $this->value->minus($y->value);

        return new self($value);
    }

    /**
     * Multiplies two BigIntegers.
     */
    public function multiply(self $x): self
    {
        $value = $this->value->multipliedBy($x->value);

        return new self($value);
    }

    /**
     * Performs modular exponentiation.
     */
    public function modPow(self $e, self $n): self
    {
        $value = $this->value->modPow($e->value, $n->value);

        return new self($value);
    }

    /**
     * Performs modular exponentiation.
     */
    public function mod(self $d): self
    {
        $value = $this->value->mod($d->value);

        return new self($value);
    }

    /**
     * Compares two numbers.
     */
    public function compare(self $y): int
    {
        return $this->value->compareTo($y->value);
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----ODg0MTcyOTg2ODU3OTM2IDgzNTA5MTAzMjU0MjQ4ODkgNzYwOTIwODQ2ODc0ODQ3Ng==