<?php

namespace app\controller;

use app\BaseController;
use app\common\cart\CartRepository;
use app\validate\CreateCart;
use think\exception\ValidateException;

class Cart extends BaseController
{

    public function createCart(){
        $data = $this -> request -> param();
        try {
            validate(CreateCart::class)->check($data);
        }catch (ValidateException $exception){
            return app('json') -> fail($exception->getError());
        }
        $cartRepository = new CartRepository();
        //商品检测
        $product = $cartRepository -> checkProduct($data);
        if(isset($product['bool']) && !$product['bool']) return app('json')->fail($product['message']);
        //购物车检测
        $cart = $cartRepository -> checkCart($this->request->uid(),$data['product_attr_unique']);
        if(isset($cart['bool']) && !$cart['bool']) return app('json')->fail($cart['message']);
        //不是立即购买，购物车存在
        if (!$data['is_new'] && $cart) {
            if ($product['sku']['stock'] < ($cart['cart_num'] + $data['cart_num']))
                return app('json')->fail('库存不足');
            //修改购物车数量
            $res = $cartRepository -> updateCart($cart['cart_id'], $cart['cart_num'] + $data['cart_num']);
            if(isset($res['bool']) && !$res['bool']) return app('json')->fail($res['message']);
        }else{
            if ($product['sku']['stock'] < $data['cart_num']) return app('json')->fail('库存不足');
            $data['uid'] = $this->request->uid();
            $data['mer_id'] = $product['product']['mer_id'];
            $cart = $cartRepository->createCart($data);
            if(isset($cart['bool']) && !$cart['bool']) return app('json')->fail($cart['message']);
        }
        return app('json')->success(['cart_id' => $cart['cart_id']]);
    }

    public function changeCart(){
        $data = $this -> request -> param();
        if (empty($data['cart_id'])) return app('json')->fail('cart_id不能为空');
        if (empty($data['cart_num'])) return app('json')->fail('数量必须大于0');
        $cartRepository = new CartRepository();
        $cartInfo = $cartRepository -> getOne($data['cart_id'],$this->request->uid());
        if(isset($cartInfo['bool']) && !$cartInfo['bool']) return app('json')->fail($cartInfo['message']);
        //商品检测
        $product = $cartRepository -> checkProduct([
            "cart_num" => $data['cart_num'],
            "product_id" => $cartInfo['product_id'],
            "product_attr_unique"=>$cartInfo['product_attr_unique']
        ]);
        if(isset($product['bool']) && !$product['bool']) return app('json')->fail($product['message']);
        //修改购物车数量
        $res = $cartRepository -> updateCart($data['cart_id'], $data['cart_num']);
        if(isset($res['bool']) && !$res['bool']) return app('json')->fail($res['message']);
        return app('json')->success('修改成功');
    }

    public function cartList(){
        $uid = $this -> request -> uid();
        $cartRepository = new CartRepository();
        $list = $cartRepository -> getListFromUid($uid);
        return app('json')->success($list);
    }
}