<?php
// +----------------------------------------------------------------------
// | LARAVEL8.0 框架 [ LARAVEL ][ RXThinkCMF ]
// +----------------------------------------------------------------------
// | 版权所有 2017~2021 LARAVEL研发中心
// +----------------------------------------------------------------------
// | 官方网站: http://www.laravel.cn
// +----------------------------------------------------------------------
// | Author: laravel开发员 <laravel.qq.com>
// +----------------------------------------------------------------------

namespace App\Services\Api;

use App\Models\CartModel;
use App\Models\GoodsModel;
use App\Services\BaseService;
use App\Services\RedisService;
use Illuminate\Support\Facades\DB;

/**
 * 购物车管理-服务类
 * @author laravel开发员
 * @since 2020/11/11
 * @package App\Services\Api
 */
class CartService extends BaseService
{
// 静态对象
    protected static $instance = null;

    /**
     * 构造函数
     * @author laravel开发员
     * @since 2020/11/11
     */
    public function __construct()
    {
        $this->model = new CartModel();
    }

    /**
     * 静态入口
     */
    public static function make()
    {
        if (!self::$instance) {
            self::$instance = new static();
        }
        return self::$instance;
    }

    /**
     * 列表数据
     * @param $params
     * @param int $pageSize
     * @return array
     */
    public function getDataList($params, $pageSize = 15)
    {
        $userId = isset($params['user_id']) ? intval($params['user_id']) : 0;
        $cacheKey = "caches:goods:cartList_{$userId}_{$pageSize}_" . ($params ? md5(json_encode($params)) : 0);
        $datas = RedisService::get($cacheKey);
        if (empty($datas)) {
            $query = $this->getQuery($params)
                ->orderBy('a.create_time', 'desc')
                ->orderBy('a.id', 'desc');

            $field = ["a.id",'a.goods_id','a.user_id','a.store_id','a.num','a.sk_key','a.sku_id'];
            $list = $query->select($field)
                ->groupBy('a.store_id')
                ->paginate($pageSize > 0 ? $pageSize : 9999999);
            $list = $list ? $list->toArray() : [];
            if ($list) {
                $datas = [
                    'pageSize' => $pageSize,
                    'total' => isset($list['total']) ? $list['total'] : 0,
                    'count' => $this->getCount($userId),
                    'list' => isset($list['data']) ? $list['data'] : []
                ];

                RedisService::set($cacheKey, $datas, rand(3, 5));
            }
        }

        return $datas;
    }


    /**
     * 查询条件
     * @param $params
     * @return mixed
     */
    public function getQuery($params)
    {
        $where = ['a.status' => 1, 'a.mark' => 1];
        $status = isset($params['status']) ? $params['status'] : 1;
        if ($status > 0) {
            $where['a.status'] = $status;
        } else {
            unset($where['a.status']);
        }
        $model = $this->model->with(['store','cartGoods'])
            ->from('carts as a')
            ->leftJoin('goods as b', 'b.id', '=', 'a.goods_id')
            ->where($where)
            ->where(function ($query) use ($params) {
                // 商品
                $goodsId = isset($params['goods_id']) ? intval($params['goods_id']) : 0;
                if ($goodsId > 0) {
                    $query->where('a.goods_id', $goodsId);
                }

                $userId = isset($params['user_id']) ? intval($params['user_id']) : 0;
                if ($userId > 0) {
                    $query->where('a.user_id', $userId);
                }

                // 店铺
                $storeId = isset($params['store_id']) ? intval($params['store_id']) : 0;
                if ($storeId > 0) {
                    $query->where('a.store_id', $storeId);
                }

                $keyword = isset($params['keyword']) ? trim($params['keyword']) : '';
                if ($keyword) {
                    $query->where(function ($query) use ($keyword) {
                        $query->where('b.goods_name', 'like', "%{$keyword}%")
                            ->orWhere('b.tags', 'like', "%{$keyword}%");
                    });
                }

            });

        return $model;
    }

    /**
     * 添加购物车
     * @param $userId
     * @param $goodsId
     * @param int $skuId
     * @return array|false
     */
    public function add($userId, $goodsId, $skuId=0, $num=1)
    {
        $cacheKey = "caches:goods:addCart:{$userId}_{$goodsId}_{$skuId}";
        if(RedisService::get($cacheKey.'_lock')){
            $this->error = '处理中～';
            return false;
        }
        RedisService::set($cacheKey.'_lock', ['goods_id'=>$goodsId,'sku_id'=>$skuId], rand(3,5));
        $goodsInfo = GoodsModel::with(['skus'])
            ->where(['id' => $goodsId, 'status' => 1, 'mark' => 1])
            ->select(['id', 'sku_type', 'store_id'])
            ->first();
        $storeId = isset($goodsInfo['store_id']) ? $goodsInfo['store_id'] : 0;
        $skuType = isset($goodsInfo['sku_type']) ? $goodsInfo['sku_type'] : 0;
        $skus = isset($goodsInfo['skus']) ? $goodsInfo['skus'] : [];
        $skuId = $skuId? $skuId : (isset($skus[0]) ? $skus[0]['id'] : 0);
        if (empty($goodsInfo)) {
            RedisService::clear($cacheKey.'_lock');
            $this->error = '商品已下架';
            return false;
        }

        // 去除其他店铺购物车
        $this->model->where(['user_id' => $userId, 'mark' => 1])->whereNotIn('store_id', [$storeId])->update(['mark' => 0, 'update_time' => time()]);

        // 添加购物型
        if ($id = $this->model->where(['user_id' => $userId,'sku_id'=>$skuId, 'goods_id' => $goodsId])->value('id')) {
            $this->model->where(['id' => $id])->update(['store_id' => $storeId,'num'=> DB::raw("num+{$num}"),'sk_key'=>"{$userId}-{$storeId}", 'sku_id' => $skuType == 1 ? 0 : $skuId, 'status' => 1, 'mark' => 1, 'create_time' => time()]);
        } else {
            $data = [
                'user_id' => $userId,
                'goods_id' => $goodsId,
                'store_id' => $storeId,
                'num'=> $num,
                'sk_key'=>"{$userId}-{$storeId}",
                'sku_id' => $skuType == 1 ? 0 : $skuId,
                'create_time' => time(),
                'status' => 1,
                'mark' => 1,
            ];
            $id = $this->model->insertGetId($data);
        }

        $this->error = '添加成功';
        RedisService::clear($cacheKey.'_lock');
        RedisService::clear("caches:goods:cartCount:{$userId}");
        RedisService::keyDel("caches:goods:cartList_{$userId}*");
        return ['id' => $id,'sku_id'=>$skuId, 'count' => $this->getCount($userId)];
    }

    /**
     * 更新购物车
     * @param $userId
     * @param $cartId
     * @return array|false
     */
    public function update($userId, $cartId, $num=1)
    {
        $cacheKey = "caches:goods:updateCart:{$userId}_{$cartId}";
        if(RedisService::get($cacheKey.'_lock')){
            $this->error = '处理中～';
            return false;
        }

        RedisService::set($cacheKey.'_lock', ['cart_id'=>$cartId], rand(3,5));
        // 去除其他店铺购物车
        $info = $this->model->where(['id'=>$cartId, 'user_id' => $userId, 'mark' => 1])->first();
        if(empty($info)){
            RedisService::clear($cacheKey.'_lock');
            $this->error = '数据不存在';
            return false;
        }

        if($num<=0){
            $this->model->where(['id' => $cartId])->update(['mark'=>0,'num'=>0,'update_time'=>time()]);
        }else{
            $this->model->where(['id' => $cartId])->update(['num' => $num,'update_time' => time()]);
        }

        RedisService::clear($cacheKey.'_lock');
        RedisService::clear("caches:goods:cartCount:{$userId}");
        return ['id' => $cartId, 'count' => $this->getCount($userId)];
    }

    /**
     * 删除购物车
     * @param $userId
     * @param $cartId
     * @return array|false
     */
    public function deleteCart($userId, $ids=[])
    {
        if($ids){
            $this->model->where(['user_id'=>$userId,'mark'=>1])->whereIn('id', $ids)->update(['mark'=>0,'num'=>0,'update_time'=>time()]);
        }else{
            $this->model->where(['user_id'=>$userId,'mark'=>1])->update(['mark' => 0,'num'=>0,'update_time' => time()]);
        }

        $this->error = '删除成功';
        RedisService::clear("caches:goods:cartCount:{$userId}");
        return ['ids' => $ids, 'count' => $this->getCount($userId)];
    }


    /**
     * 购物车数量
     * @param $userId
     * @return array|mixed
     */
    public function getCount($userId)
    {
        $cacheKey ="caches:goods:cartCount:{$userId}";
        $data = RedisService::get($cacheKey);
        if($data){
            return $data;
        }

       $count = $this->model->where(['user_id' => $userId, 'status' => 1, 'mark' => 1])->count('id');
        if($count){
            RedisService::set($cacheKey, $count, 300);
        }

        return $count;
    }
}