<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class QuestionBank extends Model
{
    // Opsional, tapi sangat disarankan agar Laravel tidak salah menebak nama tabel
    protected $table = 'question_banks';

    protected $fillable = [
        // Atribut Soal dari desain Anda
        'old_id', 
        'subject', 
        'question_type', 
        'question_level', 
        'passing_grade', 
        'duration',
        'question_text', 
        'option_a', 
        'option_b', 
        'option_c', 
        'option_d', 
        'option_e', 
        'correct_answer',
        
        // PENTING: Atribut Relasi yang dibutuhkan form Create/Edit & Filter Index
        'department_id',
        'position_id',
        'training_matrix_id',
        'created_by'
    ];

    protected $casts = [
        'correct_answer' => 'array', // Otomatis ubah JSON di database jadi Array di PHP
    ];

    /*
    |--------------------------------------------------------------------------
    | RELASI DATABASE (Diperlukan agar Filter Dropdown & Tabel berfungsi)
    |--------------------------------------------------------------------------
    */

    public function department()
    {
        return $this->belongsTo(Department::class, 'department_id');
    }

    public function position()
    {
        return $this->belongsTo(Position::class, 'position_id');
    }

    public function matrix()
    {
        return $this->belongsTo(TrainingMatrix::class, 'training_matrix_id');
    }

    public function creator()
    {
        // Merujuk ke tabel users untuk mengetahui siapa staff/admin yang buat soal
        return $this->belongsTo(User::class, 'created_by');
    }
}