<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;

class Course extends Model
{
    use HasFactory, SoftDeletes;

    protected $guarded = ['id'];

    public function assignments(): HasMany
    {
        return $this->hasMany(Assignment::class);
    }

    public function classSessions(): HasMany
    {
        return $this->hasMany(ClassSession::class);
    }

    public function courseSchedules(): HasMany
    {
        return $this->hasMany(CourseSchedule::class);
    }

    public function materials(): HasMany
    {
        return $this->hasMany(Material::class);
    }

    public function studyGroups(): BelongsToMany
    {
        return $this->belongsToMany(StudyGroup::class, 'study_group_courses');
    }
}