<?php

declare(strict_types=1);

namespace Modules\Helpdesk\Services;

use Modules\Helpdesk\Models\Ticket;

final class TicketReferenceService
{
    /**
     * Build the next human-readable ticket reference.
     *
     * @return string
     */
    public function next(): string
    {
        $year = now()->format('Y');
        $prefix = 'HD-' . $year . '-';
        $last = Ticket::query()
            ->where('reference', 'like', $prefix . '%')
            ->latest('id')
            ->value('reference');

        $next = $last ? ((int) substr((string) $last, -5)) + 1 : 1;

        return $prefix . str_pad((string) $next, 5, '0', STR_PAD_LEFT);
    }
}