<?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:----NDE4NzY1MDYzMTk3ODM2MCAzNzk2ODI5NzY4MTA4Njc1IDE2MzExMzYxNTI1NjE0NTc=