<?php

namespace App\Module\Shop\Validations;

use App\Module\Shop\Validators\ShopItemValidator;
use App\Module\Shop\Validators\ShopBuyLimitValidator;
use App\Module\Shop\Validators\ShopFundValidator;
use UCore\ValidationCore;

/**
 * 商店购买验证类
 *
 * 用于验证商店购买操作的输入数据，包括用户ID、商品ID和购买数量
 */
class ShopBuyValidation extends ValidationCore
{
    /** @var \App\Module\Shop\Models\ShopItem|null 商品对象，由 ShopItemValidator 设置 */
    public ?\App\Module\Shop\Models\ShopItem $shop_item = null;
    /**
     * 验证规则
     *
     * @param array $rules 自定义规则
     * @return array
     */
    public function rules($rules = []): array
    {
        return [
            [
                'user_id,good_id,number', 'required'
            ],
            [
                'user_id,good_id,number', 'integer', 'min' => 1,
                'msg' => '{attr}必须是大于0的整数'
            ],
            // 验证商品是否存在且可购买
            [
                'good_id', new ShopItemValidator($this, ['shop_item']),
                'msg' => '商品验证失败'
            ],
            // 验证购买限制
            [
                'good_id', new ShopBuyLimitValidator($this, ['user_id', 'number', 'shop_item']),
                'msg' => '购买限制验证失败'
            ],
            // 验证用户资金是否充足
            [
                'good_id', new ShopFundValidator($this, ['user_id', 'number', 'shop_item']),
                'msg' => '资金不足'
            ]
        ];
    }

    /**
     * 设置默认值
     *
     * @return array
     */
    public function default(): array
    {
        return [];
    }
}