<?php

namespace App\Models\Course;

use App\Models\User;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class CourseCart extends Model
{
    use HasFactory;

    /**
     * The attributes that are mass assignable.
     *
     * @var array<int, string>
     */
    protected $fillable = [
        'user_id',
        'course_id'
    ];

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

    /**
     * Get the course that belongs to the cart item.
     */
    public function course(): BelongsTo
    {
        return $this->belongsTo(Course::class);
    }

    /**
     * Scope a query to only include cart items for a specific user.
     */
    public function scopeForUser($query, $userId)
    {
        return $query->where('user_id', $userId);
    }
}