<?php

declare(strict_types=1);

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;

/**
 * @property int $id
 * @property int $user_id
 * @property string $name
 * @property string $pdf_path
 * @property string|null $extracted_content
 * @property string $processing_status
 * @property string|null $error_message
 * @property bool $is_active
 * @property \Illuminate\Support\Carbon|null $created_at
 * @property \Illuminate\Support\Carbon|null $updated_at
 * @property-read User $user
 * @property-read Collection<int, CustomSubjectQuestion> $questions
 */
class CustomSubject extends Model
{
    /** @var array<int, string> */
    protected $fillable = [
        'user_id',
        'name',
        'pdf_path',
        'extracted_content',
        'processing_status',
        'error_message',
        'is_active',
    ];

    /** @var array<string, string> */
    protected $casts = [
        'is_active' => 'boolean',
    ];

    /**
     * Get the user who owns the custom subject.
     */
    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    /**
     * Get the questions for this custom subject.
     */
    public function questions(): HasMany
    {
        return $this->hasMany(CustomSubjectQuestion::class);
    }
}