<?php

namespace App\Models;

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

class Course extends Model
{
    use SoftDeletes;

    protected $fillable = [
        'code',
        'code_prefix',
        'title',
        'course_system_dict_item_id',
        'course_type_dict_item_id',
        'teach_start_date',
        'teach_end_date',
        'location',
        'teach_start_time',
        'teach_end_time',
        'recruit_targets',
        'main_speakers',
        'signup_start_date',
        'signup_end_date',
        'auto_add_teacher_dict_item_id',
        'capacity',
        'cover_media_id',
        'promo_media_id',
        'news_id',
        'news_link_url',
        'intro_html',
        'signup_form_schema',
        'progress_status',
        'published',
        'remark',
        'sort',
    ];

    protected $casts = [
        'teach_start_date' => 'date',
        'teach_end_date' => 'date',
        'signup_start_date' => 'date',
        'signup_end_date' => 'date',
        'capacity' => 'integer',
        'cover_media_id' => 'integer',
        'promo_media_id' => 'integer',
        'news_id' => 'integer',
        'progress_status' => 'integer',
        'published' => 'integer',
        'sort' => 'integer',
        'signup_form_schema' => 'array',
        'recruit_targets' => 'array',
        'main_speakers' => 'array',
    ];

    public function courseSystemItem(): BelongsTo
    {
        return $this->belongsTo(DictItem::class, 'course_system_dict_item_id');
    }

    public function courseTypeItem(): BelongsTo
    {
        return $this->belongsTo(DictItem::class, 'course_type_dict_item_id');
    }

    public function autoAddTeacherItem(): BelongsTo
    {
        return $this->belongsTo(DictItem::class, 'auto_add_teacher_dict_item_id');
    }

    public function coverMedia(): BelongsTo
    {
        return $this->belongsTo(CourseMedia::class, 'cover_media_id');
    }

    public function promoMedia(): BelongsTo
    {
        return $this->belongsTo(CourseMedia::class, 'promo_media_id');
    }

    public function news(): BelongsTo
    {
        return $this->belongsTo(News::class);
    }

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

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

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