<?php
// +----------------------------------------------------------------------
// | A3Mall
// +----------------------------------------------------------------------
// | Copyright (c) 2020 http://www.a3-mall.com All rights reserved.
// +----------------------------------------------------------------------
// | Author: xzncit <158373108@qq.com>
// +----------------------------------------------------------------------
namespace mall\basic;

use mall\utils\BC;
use mall\utils\Tool;
use think\facade\Db;
use think\facade\Session;

class Shopping {

    public static function get($cart){
        $data = [
            "item"=>[],
            "activity_id"=>0,
            "type"=>0,
            "promotions"=>0,
            "discount"=>0,
            "goods_weight"=>0,
            "real_freight"=>0,
            "payable_freight"=>0,
            "real_amount"=>0,
            "payable_amount"=>0,
            "order_total"=>0,
            "order_amount"=>0,
            "exp"=>0,
            "point"=>0
        ];

        foreach($cart as $key=>$val){
            $products = [];
            if(Db::name("goods_item")->where("goods_id",$val["goods_id"])->count()){
                $products = Db::name("goods_item")
                    ->where("goods_id",$val["goods_id"])
                    ->where("spec_key",$val["spec_key"])->find();

                if(empty($products)){
                    throw new \Exception("您选择的商品已下架",0);
                }

                if($val["nums"] > $products["store_nums"]){
                    throw new \Exception("您选择的商品库存不足",0);
                }
            }

            $goods = Db::name("goods")->where("id",$val["goods_id"])->find();
            if(empty($goods)){
                throw new \Exception("您选择的商品已下架",0);
            }

            if(empty($products) && $val["nums"] > $goods["store_nums"]){
                throw new \Exception("您选择的商品库存不足",0);
            }

            $data['item'][$key] = [
                "goods_id"=>$goods["id"],
                "distribution_id"=>$goods["delivery_id"],
                "title"=>$goods["title"],
                "goods_no"=>$goods["goods_number"],
                "thumb_image"=>Tool::thumb($goods["photo"],"medium",true),
                "goods_nums"=>$val["nums"],
                "goods_weight"=>$goods["goods_weight"],
                "market_price"=>$goods["market_price"],
                "real_price"=>$goods["sell_price"],
                "sell_price"=>$goods["sell_price"],
                "goods_array"=>"",
                "fictitious_array"=>""
                //"cost_price"=>$goods["cost_price"]
            ];

            if($goods["goods_type"] != 0){
                $data['item'][$key]["fictitious_array"] = json_encode([
                    "goods_type"=>$goods["goods_type"],
                    "value"=>$goods["goods_type"] == 1 ? $goods["card_id"] : ($goods["goods_type"] == 2 ? $goods["goods_content"] : $goods["down_url"]),
                ],JSON_UNESCAPED_UNICODE);
            }

            $data["point"] = BC::add($goods["point"] * $val["nums"],$data["point"],0);
            $data["exp"] = BC::add($goods["exp"] * $val["nums"],$data["exp"],0);

            if(!empty($products)){
                $data['item'][$key]["goods_weight"] = $products["goods_weight"];
                $data['item'][$key]["market_price"] = $products["market_price"];
                $data['item'][$key]["real_price"] = $products["sell_price"];
                $data['item'][$key]["sell_price"] = $products["sell_price"];
                //$data['item'][$key]["cost_price"] = $products["cost_price"];
                $data['item'][$key]["product_id"] = $products["id"];
                $data['item'][$key]["spec_key"] = $products["spec_key"];
                $data['item'][$key]["goods_array"] = Attribute::get($goods["id"],$products["spec_key"]);
                $data["goods_weight"] = BC::add($products["goods_weight"] * $val["nums"],$data["goods_weight"]);
                $data["real_amount"] = BC::add($products["sell_price"] * $val["nums"],$data["real_amount"]);
                $data["payable_amount"] = BC::add($products["sell_price"] * $val["nums"],$data["payable_amount"]);
            }else{
                $data["goods_weight"] = BC::add($goods["goods_weight"] * $val["nums"],$data["goods_weight"]);
                $data["real_amount"] = BC::add($goods["sell_price"] * $val["nums"],$data["real_amount"]);
                $data["payable_amount"] = BC::add($goods["sell_price"] * $val["nums"],$data["payable_amount"]);
            }

            $data["activity_id"] = $val["activity_id"];
            $data["type"] = $val["type"];
        }

        return $data;
    }

    public static function add($id,$sku_id,$num=1){
        $num = $num ?: 1;

        if($num <= 0){
            $num = 1;
        }

        $goods = Db::name("goods")->where("id",$id)->find();
        if(empty($goods) || $goods["status"] != 0){
            throw new \Exception("该商品已下架！",0);
        }

        $products = null;
        if(Db::name("goods_item")->where("goods_id",$id)->count()){
            $products = Db::name("goods_item")->where([
                "id"=>$sku_id,
                "goods_id"=>$id
            ])->find();

            if(empty($products)){
                throw new \Exception("该商品已下架。",0);
            }
        }

        if(!empty($products)){
            if($products["store_nums"] < $num){
                throw new \Exception("您选择的商品库存不足",0);
            }
        }else{
            if($goods["store_nums"] < $num){
                throw new \Exception("您选择的商品库存不足",0);
            }
        }

        $cart = [
            "session_id"=>session_id(),
            "user_id"=>Users::get("id"),
            "goods_id"=>$id,
            "product_id"=>!empty($products["id"]) ? $products["id"] : 0,
            "spec_key"=>!empty($products["spec_key"]) ? $products["spec_key"] : "",
            "sell_price"=>!empty($products["sell_price"]) ? $products["sell_price"] : $goods["sell_price"],
            "cost_price"=>!empty($products["cost_price"]) ? $products["cost_price"] : $goods["cost_price"],
            "market_price"=>!empty($products["market_price"]) ? $products["market_price"] : $goods["market_price"],
            "goods_weight"=>!empty($products["goods_weight"]) ? $products["goods_weight"] : $goods["goods_weight"],
            "goods_nums"=>$num,
            "create_time"=>time()
        ];

        $map = [
            "goods_id"=>$id,
            "user_id"=>Users::get("id")
        ];

        if(!empty($products["spec_key"])){
            $map["spec_key"] = $products["spec_key"];
        }

        if(Db::name("cart")->where($map)->count()){
            Db::name("cart")->where($map)->update([
                "goods_nums"=>$num,
                "update_time"=>time()
            ]);
        }else{
            Db::name("cart")->insert($cart);
        }

        return true;
    }

    public static function cartAmount(){
        $row = Db::name("cart")
            ->field("SUM(sell_price * goods_nums) as price")
            ->where("user_id",Session::get("user_id"))->find();
        return isset($row["price"]) ? $row["price"] : "0.00";
    }

    public static function delete($id){
        if(empty($id)){
            throw new \Exception("非法参数",0);
        }

        if(!is_array($id)){
            $id = array_map("intval",explode(",",$id));
        }

        return Db::name("cart")
            ->where("id","in",$id)
            ->where("user_id",Users::get("id"))
            ->delete();
    }
}