<?php
namespace YTKNS;

final class Colour {
    private int $raw = 0;

    public function __construct(int $raw = 0) {
        $this->setRaw($raw);
    }

    public static function create($value): ?Colour {
        $colour = is_int($value) ? $value : (is_string($value) && ctype_digit($value) ? (int)$value : -1);
        return $colour < 0 || $colour > 0xFFFFFF ? null : new static($colour);
    }

    public function getRaw(): int {
        return $this->raw;
    }
    public function setRaw(int $raw): self {
        $this->raw = $raw & 0xFFFFFF;
        return $this;
    }

    public function getHex(): string {
        return str_pad(dechex($this->raw), 6, '0', STR_PAD_LEFT);
    }
}