<?php

namespace App\Services;

use DB;
use Carbon\Carbon;
use App\Models\{User, ActivityUser, ActivityGood, ActivityOption};

/**
 * Class OrderService
 *
 * @package App\Services
 */
class GoodsService
{
    /**
     * 检测商品是否有效
     */
    public function checkGoodsInfo(){

    }

    public function addGoodsSellNum(){
        
    }
    /**
     * 检测是否有足够的奖品兑换
     * 
     */
    public function canExchange($goods_id, $user_id){
        $activity_goods = ActivityGood::where('goods_id',$goods_id)->first();
        $activity_user = ActivityUser::where('user_id',$user_id)->first();
        if($activity_goods && $activity_user){
            $cancel_num = 0;
            $need_exchange = [];
            for($i =1; $i<10; $i++){
                $key = 'award_'.$i;
                if($activity_goods->$key > 0){
                    $need_exchange[] = $i;
                    if($activity_user->$key <= 0){
                        $cancel_num++;
                    }
                }
            }
            //判断万能图数量足够不
            if($cancel_num > 0){
                //计算当前用户有多少万能图
                $all_use = ActivityOption::where('is_all', 1)->get();
                $user_all_num = 0;
                foreach($all_use as $is_all){
                    $key = 'award_'.$is_all->id;
                    $user_all_num += $activity_user->$key;
                }
                //判断
                if($cancel_num > $user_all_num){
                    return false;
                }else{
                    return $need_exchange;
                }
            }else{
                return $need_exchange;
            }
        }
        return false;
    }

    public function goodsCartPrice(){
        $cart_price = 0;
        $goods_cart = auth('api')->user()->getUserCart()->toArray();

        $too_goods_arr = [];
        foreach($goods_cart as $t_goods){
            /** 处理第二杯半价商品start **/
            if($t_goods['is_too'] == 1){
                if(isset($too_goods_arr[$t_goods['goods_id']])){
                    $too_goods_arr[$t_goods['goods_id']]['goods_num'] += $t_goods['goods_num'];
                }else{
                    $too_goods_arr[$t_goods['goods_id']]['goods_num'] = $t_goods['goods_num'];
                }
                if(!isset($too_goods_arr[$t_goods['goods_id']]['goods_price']) || 
                    $too_goods_arr[$t_goods['goods_id']]['goods_price'] > $t_goods['goods_price'])
                    {
                    $too_goods_arr[$t_goods['goods_id']]['goods_price'] = $t_goods['goods_price'];
                }
            }
            $cart_price += $t_goods['goods_price']*$t_goods['goods_num'];
        }
        $order_special_value = 0;
        if(count($too_goods_arr) > 0){
            foreach($goods_cart as $key=> $o_goods){
                if(isset($too_goods_arr[$o_goods['goods_id']]['goods_num']) && $too_goods_arr[$o_goods['goods_id']]['goods_num'] >=2){
                    if($o_goods['goods_price'] == $too_goods_arr[$o_goods['goods_id']]['goods_price']){
                        $goods_cart[$key]['special_value'] = number_format(round(intval($o_goods['goods_price']*100)/2)/100, 2);
                        $order_special_value += $goods_cart[$key]['special_value'];
                    }
                }
            }
        }
        if($order_special_value){
            $cart_price -= $order_special_value;
        }

        return $cart_price;
    }
}