<?php

namespace App\Helpers;

use Illuminate\Support\Str;
use App\Models\Order;

class OrderHelper
{
    /**
     * Generate a unique order number with prefix.
     *
     * @param string $prefix
     * @return string
     */
    public static function generateOrderNumber(string $prefix = 'ORD'): string
    {
        do {
            // Generate a random string of 8 uppercase characters/numbers
            $random = strtoupper(Str::random(8));
            $orderNum = $prefix . '-' . $random;
            
            if ($prefix === 'INV') {
                $exists = \App\Models\Invoice::where('order_num', $orderNum)->exists();
            } else {
                $exists = Order::where('order_num', $orderNum)->exists();
            }
            
        } while ($exists);

        return $orderNum;
    }
}