<?php

namespace App\Models;

use App\Enums\DrawPrizeType;
use App\Exceptions\BizException;
use Dcat\Admin\Traits\HasDateTimeFormatter;
use Illuminate\Database\Eloquent\Model;

class DrawActivityPrize extends Model
{
    use HasDateTimeFormatter;

    /**
     * @var array
     */
    protected $attributes = [
        'type' => DrawPrizeType::None,
        'weight' => 0,
        'limited' => true,
        'sort' => 0,
    ];

    /**
     * @var array
     */
    protected $casts = [
        'type' => DrawPrizeType::class,
        'limited' => 'bool',
    ];

    /**
     * @var array
     */
    protected $fillable = [
        'draw_activity_id',
        'name',
        'icon',
        'type',
        'amount',
        'weight',
        'limited',
        'stock',
        'winnings',
        'sort',
    ];

    public static function booted()
    {
        static::updating(function ($drawActivityPrize) {
            if ($drawActivityPrize->weight == 0 && $drawActivityPrize->activity->isPublished()) {
                $weight = $drawActivityPrize->activity->prizes()->where('id', '!=', $drawActivityPrize->id)->sum('weight');

                if ($weight == 0) {
                    throw new BizException('活动奖品总权重值不能为0');
                }
            }
        });
    }

    public function activity()
    {
        return $this->belongsTo(DrawActivity::class, 'draw_activity_id');
    }
}