<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class Question extends Model {
    protected $fillable = ['subject_id','question_text','type','difficulty','points_value','active'];
    protected $casts = ['active' => 'boolean'];
    public function subject() { return $this->belongsTo(Subject::class); }
    public function answerOptions() { return $this->hasMany(AnswerOption::class)->orderBy('sort_order'); }
    public function attempts() { return $this->hasMany(QuestionAttempt::class); }
    public function difficultyStars(): string {
        return str_repeat('⭐', $this->difficulty);
    }
}