<?php

namespace addons\Scratch\common\models;

use addons\Coupon\common\models\AddonsCoupon;
use addons\Scratch\common\enums\ScratchEnum;
use Yii;

/**
 * Class ScratchUserModel
 * @package addons\Scratch\common\models
 */
class ScratchCouponModel extends AddonsCoupon
{

    /**
     * @param $num integer 修改的数量
     * @param $type string 增加add|减少sub
     * @param null|integer $id 优惠券ID
     * @return Coupon|null
     * @throws Exception
     */
    public function updateCount($num, $type, $id = null)
    {
        if ($id) {
            $coupon = self::findOne(['id' => $id, 'status' => [ScratchEnum::DISABLED, ScratchEnum::ENABLED]]);
        } else {
            $coupon = $this;
        }
        if (!$coupon || !$coupon->id) {
            throw new \ErrorException('错误的优惠券信息');
        }
        if ($coupon->total_count == -1) {
            return $coupon;
        }
        if ($type === 'add') {
            $coupon->total_count += $num;
        } elseif ($type === 'sub') {
            if ($coupon->total_count < $num) {
                throw new \ErrorException('优惠券库存不足');
            }
            $coupon->total_count -= $num;
        } else {
            throw new \ErrorException('错误的$type');
        }
        if ($coupon->save()) {
            return $coupon;
        } else {
            throw new \ErrorException($coupon->getErrorMessage());
        }
    }


    /**
     * @param $id
     * @param string $select
     * @return array|\yii\db\ActiveRecord|null
     * @throws \ErrorException
     */
    public static function getData($id, $select = '*')
    {
        try {
            $data = self::find()
                ->where([
                    'id' => $id,
                    'status' => [ScratchEnum::ENABLED, ScratchEnum::DISABLED],
                ])
                ->select($select)
                ->asArray()
                ->one();

            return $data;
        } catch (\Exception $exception) {
            throw new \ErrorException($exception->getMessage());
        }
    }

}