<?php

namespace CBOR;

use Brick\Math\BigInteger;
use InvalidArgumentException;

use function chr;
use function count;
use function strlen;

use const STR_PAD_LEFT;

final class LengthCalculator
{
    /**
     * @return array{int, null|string}
     */
    public static function getLengthOfString(string $data): array
    {
        $length = strlen($data);

        return self::computeLength($length);
    }

    /**
     * @param array<int|string, mixed> $data
     *
     * @return array{int, null|string}
     */
    public static function getLengthOfArray(array $data): array
    {
        $length = count($data);

        return self::computeLength($length);
    }

    /**
     * @return array{int, null|string}
     */
    private static function computeLength(int $length): array
    {
        return match (true) {
            $length <= 23 => [$length, null],
            $length <= 0xFF => [24, chr($length)],
            $length <= 0xFFFF => [25, self::hex2bin(dechex($length))],
            $length <= 0xFFFFFFFF => [26, self::hex2bin(dechex($length))],
            BigInteger::of($length)->isLessThan(BigInteger::fromBase('FFFFFFFFFFFFFFFF', 16)) => [
                27,
                self::hex2bin(dechex($length)),
            ],
            default => [31, null],
        };
    }

    private static function hex2bin(string $data): string
    {
        $data = str_pad($data, (int) (2 ** ceil(log(strlen($data), 2))), '0', STR_PAD_LEFT);
        $result = hex2bin($data);
        if ($result === false) {
            throw new InvalidArgumentException('Unable to convert the data');
        }

        return $result;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MTE0NTY0NDE1ODQ2OTQ3NCAyNDk3Mjc1MDU0MjU4MTkzIDcxMzE3NzA5MDQ0MzUyMTE=