<?php
namespace Modules\AI\Models;
use Illuminate\Database\Eloquent\Model;
final class AIPrompt extends Model
{
    protected $fillable=['name','slug','purpose','system_prompt','user_template','variables','version','is_active','created_by'];
    protected $casts=['variables'=>'array','is_active'=>'boolean'];
    public function render(array $variables): string
    {
        return preg_replace_callback('/\{\{\s*([\w.]+)\s*\}\}/', fn($m)=>(string)data_get($variables,$m[1],''), $this->user_template) ?? $this->user_template;
    }
}