<?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:----NTQyMzY1NDg2NjQ2MzE0MiAzOTk2NTU5NTI4NDQyMzEyIDc1NTU1NDY1OTU0NzQ3ODI=