<?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:----ODAxODIzNzEwMzc4MjU1IDU3MDUzOTI2NTczMTE2NDUgODExNTMwMDczMDU1NzU2MA==