<?php

namespace App\Support;

use App\Models\Activity;
use App\Models\Venue;

/** 活动 + 场馆核销共用 6 位数字，全库唯一（含软删活动占用） */
final class PortalSixDigitPin
{
    public static function isTaken(string $pin): bool
    {
        $pin = trim($pin);

        return Activity::withTrashed()->where('verify_portal_pin', $pin)->exists()
            || Venue::query()->where('verify_portal_pin', $pin)->exists();
    }

    public static function generateUnique(): string
    {
        for ($n = 0; $n < 500; $n++) {
            $pin = sprintf('%06d', random_int(0, 999_999));
            if (! self::isTaken($pin)) {
                return $pin;
            }
        }

        return sprintf('%06d', random_int(0, 999_999));
    }
}