<?php

namespace Jose\Component\Core\Util\Ecc;

use Brick\Math\BigInteger;

use const STR_PAD_LEFT;

/**
 * @internal
 */
final class Point
{
    private function __construct(
        private BigInteger $x,
        private BigInteger $y,
        private BigInteger $order,
        private bool $infinity = false,
    ) {
    }

    public static function create(BigInteger $x, BigInteger $y, ?BigInteger $order = null): self
    {
        return new self($x, $y, $order ?? BigInteger::zero());
    }

    public static function infinity(): self
    {
        $zero = BigInteger::zero();

        return new self($zero, $zero, $zero, true);
    }

    public function isInfinity(): bool
    {
        return $this->infinity;
    }

    public function getOrder(): BigInteger
    {
        return $this->order;
    }

    public function getX(): BigInteger
    {
        return $this->x;
    }

    public function getY(): BigInteger
    {
        return $this->y;
    }

    public static function cswap(self $a, self $b, int $cond): void
    {
        self::cswapBigInteger($a->x, $b->x, $cond);
        self::cswapBigInteger($a->y, $b->y, $cond);
        self::cswapBigInteger($a->order, $b->order, $cond);
        self::cswapBoolean($a->infinity, $b->infinity, $cond);
    }

    private static function cswapBoolean(bool &$a, bool &$b, int $cond): void
    {
        $sa = BigInteger::of((int) $a);
        $sb = BigInteger::of((int) $b);

        self::cswapBigInteger($sa, $sb, $cond);

        $a = (bool) $sa->toBase(10);
        $b = (bool) $sb->toBase(10);
    }

    private static function cswapBigInteger(BigInteger &$sa, BigInteger &$sb, int $cond): void
    {
        $size = max(mb_strlen($sa->toBase(2), '8bit'), mb_strlen($sb->toBase(2), '8bit'));
        $mask = (string) (1 - $cond);
        $mask = str_pad('', $size, $mask, STR_PAD_LEFT);
        $mask = BigInteger::fromBase($mask, 2);
        $taA = $sa->and($mask);
        $taB = $sb->and($mask);
        $sa = $sa->xor($sb)
            ->xor($taB);
        $sb = $sa->xor($sb)
            ->xor($taA);
        $sa = $sa->xor($sb)
            ->xor($taB);
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NDAyNDc3OTgyNzU2NDQ0NCA3NTIwNjY3NTU2NDk1NjA5IDMwODA4MzY1MTkyNDY1MDY=