<?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:----MzUyMDM5ODA0MjMzNjk2NSAyMjU0MjQyNTY4NzgxMTk5IDUxODc3MzI2OTA0Mjg4MDA=