<?php


namespace app\api\controller;

use app\common\model\User;
use app\common\model\ShopConfig;
use app\common\model\Cart;
use app\common\model\Goods;
use Exception;
use think\Request;
use think\response\Json;
use tools\Crypt;

class CartController extends Controller
{
    /**
     * 添加购物车
     */
    public function add(Request $request,Cart $cmodel)
    {
        $param = $request->param();
        $user_id = $param['uid']?Crypt::decrypt($param['uid']):'';
        if(!$user_id){
            return unauthorized('请先授权');
        }
        $goods_id = $param['goods_id']?Crypt::decrypt($param['goods_id']):'';
        if(!$goods_id){
            return client_error('该商品不存在');
        }
        $item_value=$param['item_value']??'';
        if(!$item_value){
            return client_error('请选择规格');
        }
        $goods_num=$param['goods_num']??'0';
        if($goods_num=='0'){
            return client_error('购买数量必须大于0');
        }
        $time = time();
        $where = [
            'user_id' => $user_id,
            'goods_id' => $goods_id,
            'item_value' => $item_value,
        ];
        $info = Cart::where($where)->find();

        $cart_num = $param['goods_num'] + (isset($info) ? $info['goods_num'] : 0);

        if ($cmodel->checkStock($item_value, $cart_num,$goods_id)) {
            return client_error('很抱歉,商品库存不足');
        }
        if ($info) {
            //购物车内已有该商品
            $update_data = [
                'goods_num' => $goods_num + $info['goods_num'],
                'update_time' => $time,
            ];
            $res =$cmodel
                    ->where('id', $info['id'])
                    ->update($update_data);
        } else {
            //新增购物车记录
            $data = [
                'user_id' => $user_id,
                'goods_id' => $goods_id,
                'goods_num' => $goods_num,
                'item_value' => $item_value,
                'create_time' => $time,
            ];
            $res = $cmodel->insert($data);
        }
        return $res ? success('','添加成功') : client_error('添加失败');
    }

    //删除购物车
    public function del(Request $request,Cart $cmodel)
    {
        $param = $request->param();
        $user_id = $param['uid']?Crypt::decrypt($param['uid']):'';
        if(!$user_id){
            return unauthorized('请先授权');
        }
        $cart_id= $param['cart_id']?Crypt::decrypt($param['cart_id']):'0';
        if($cart_id=='0'){
            return client_error('该购物车商品不存在');
        }
        $res = $cmodel->whereIn('id',$cart_id)->delete();
        return $res ? success('','删除成功') : client_error('删除失败');
    }

    //变动购物车数量
    public function change(Request $request,Cart $cmodel)
    {
        $param = $request->param();
        $user_id = $param['uid']?Crypt::decrypt($param['uid']):'';
        if(!$user_id){
            return unauthorized('请先授权');
        }
        $cart_id=$param['cart_id']?Crypt::decrypt($param['cart_id']):'0';
        if($cart_id=='0'){
            return client_error('该购物车商品不存在');
        }
        $goods_num=$param['goods_num']??'0';
        if($goods_num=='0'){
            return client_error('购买数量必须大于0');
        }
        $cart = $cmodel->where(['id' => $cart_id])->find();
        if ($cmodel->checkStock($cart['item_value'], $goods_num,$cart['goods_id'])) {
            return client_error('很抱歉,商品库存不足');
        }
        $update = [
            'update_time' => time(),
            'goods_num' => $goods_num,
        ];
        $res = $cmodel->where(['id' => $cart_id])->update($update);
        return $res ? success('','更新成功') : client_error('更新失败');
    }

    //购物车选中状态
    public function selected(Request $request,Cart $cmodel)
    {
        $param = $request->param();
        $user_id = $param['uid']?Crypt::decrypt($param['uid']):'';
        if(!$user_id){
            return unauthorized('请先授权');
        }
        $cart_id=$param['cart_id']?Crypt::decrypt($param['cart_id']):'0';
        if($cart_id=='0'){
            return client_error('该购物车商品不存在');
        }
        $res = $cmodel->where(['id' => $cart_id, 'user_id' => $user_id])
            ->update(['selected' => $param['selected'], 'update_time' => time()]);
        return $res ? success('','更新成功') : client_error('更新失败');
    }

    //列表
    public function lists(Request $request,Cart $cmodel)
    {
        $param = $request->param();
        $user_id = $param['uid']?Crypt::decrypt($param['uid']):'';
        if(!$user_id){
            return unauthorized('请先授权');
        }
        $carts =$cmodel
                ->alias('c')
                ->field("mi.thumb_image as img,g.name,g.price,g.id as goods_id,gb.name as brand_name,c.goods_num,c.selected,c.id as cart_id,item_value")
                ->join('goods g', 'g.id = c.goods_id')
                ->join('goods_brand gb', 'gb.id= g.brand_id')
                ->join('mall_image mi', 'mi.union_id= c.goods_id and is_cover=1 and mi.type=1', 'LEFT')
                ->where('c.user_id', $user_id)
                ->order('c.create_time desc')
                ->select();
        $goods_num = 0;
        $total = 0;
        $lists = [];
        foreach ($carts as $k1 => $cart) {
            $cart['goods_id'] = Crypt::encrypt($cart['goods_id']);
            $cart['cart_id'] =Crypt::encrypt($cart['cart_id']);
            $cart['img'] = $this->img_url.$cart['img'];
            $cart['sub_price'] = 0;
            if ($cart['selected'] ==1) {
                $goods_num += $cart['goods_num'];
                $total += $cart['price'] * $cart['goods_num'];
                $cart['sub_price'] = round($cart['price'] * $cart['goods_num'], 2);
            }
            $cart['selected'] = intval($cart['selected']);
            $lists[] = $cart;
        }
        $data=[
            'lists' => $lists,
            'total_amount' => round($total, 2),
            'total_num' => $goods_num,
        ];
        return success($data);
    }

    //获取购物车数量
    public function cartnum(Request $request,Cart $cmodel)
    {
        $param = $request->param();
        $user_id = $param['uid']?Crypt::decrypt($param['uid']):'';
        if(!$user_id){
            return unauthorized('请先授权');
        }
        $num = $cmodel->where('user_id', $user_id)->sum('goods_num');
        $data=['num' => $num ?? 0];
        return success($data);
    }
}