<?php

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:----MTc1NzMyMTg0MTcxNDA2NCA0MjAyNzgyNTEzMjc5NjI0IDI4OTYwOTM4MTYwMzkwMDc=