<?php
namespace app\api\logic;
use app\api\model\OrderPoints;
use think\Db;
use think\Exception;
use app\common\server\UrlServer;
use app\api\logic\UserLogic;

class PointsLogic
{
    //获取积分的分类
    public static function classify(){
        return Db::name('printer_type')->where('del',0)->select();
    }
    
    
    //获取到积分的商品列表
    public static function goodslist($clsssId){
        $where=[
            'brand_id'=>$clsssId,
            'del'=>0
        ];
        $goods = Db::name('printer_goods')
               ->where($where)
               ->select();
        foreach($goods as &$item){
            
            $item['images']=UrlServer::getFileUrl($item['images']);
            
        }
        return $goods;
    }
    //根据ID获取到积分商品
    public static function goodsIofo($id){
        
        $data=Db::name('printer_goods')->where('id',$id)->find();
        $data['images']=UrlServer::getFileUrl($data['images']);
        return $data;
    }
    
    /**
     * 积分商品下单（扣减积分并生成订单）
     * @param array $data ['id','name','price','user_id','number'(可选)]
     * @return array
     */
    public static function goodsSub($data){
        if(empty($data) || !is_array($data)){
            return ['code'=>0,'msg'=>'参数错误'];
        }
        // 基础校验
        if(empty($data['id']) || empty($data['user_id']) || !isset($data['price'])){
            return ['code'=>0,'msg'=>'参数不完整'];
        }
        $number = isset($data['number']) && intval($data['number'])>0 ? intval($data['number']) : 1;
        $price  = floatval($data['price']);
        $needIntegral = $price * $number;

        Db::startTrans();
        try{
            // 加锁读取用户积分
            $user = Db::name('user')->where('id',$data['user_id'])->lock(true)->find();
            if(!$user){
                throw new Exception('用户不存在');
            }
            if($user['user_integral'] < $needIntegral){
                throw new Exception('积分不足');
            }

            $orderData = [
                'name'        => $data['name'] ?? '',
                'goods_id'    => $data['id'],
                'price'       => $price,
                'number'      => $number,
                'user_id'     => $data['user_id'],
                'create_time' => time(),
                'address_id'  => $data['addressId'],
                'state'       => 1
            ];

            $insert = Db::name('printer_order')->insert($orderData);
            if(!$insert){
                throw new Exception('下单失败');
            }

            // 扣减积分
            Db::name('user')
                ->where('id',$data['user_id'])
                ->setDec('user_integral', $needIntegral);

            Db::commit();
            return ['code'=>1,'msg'=>'兑换成功'];
        }catch (\Exception $e){
            Db::rollback();
            return ['code'=>0,'msg'=>$e->getMessage()];
        }
    }


    //获取积分订单
    public static function orderList($userId, $state = null)
    {
        $order = new OrderPoints();
        $query = $order->with([
            'address' => function($query){
                $query->where('del',0)->field('id,address');
            },
            'pointsGoods' => function($query){
                $query->where('del',0)->field('id,images');
            }
        ])->where('user_id', $userId);

        // 如果传了state参数，才添加state条件，否则查询全部
        if($state !== null && $state !== ''){
            $query = $query->where('state', $state);
        }

        $orderArray = $query->paginate(10);
        return $orderArray;
    }
}