<?php
namespace App\Services\Document;

use App\Models\Document;
use RuntimeException;

class DocumentCodeService
{
    public function generate(int $tries = 10): string
    {
        for ($i = 0; $i < $tries; $i++) {
            $code = str_pad((string) random_int(0, 999999), 6, '0', STR_PAD_LEFT);
            if (! Document::where('code', $code)->exists()) {
                return $code;
            }
        }
        throw new RuntimeException('Unable to generate unique code');
    }
}