content: package com.sky.service.impl;
  
  import com.alibaba.fastjson.JSON;
  import com.github.pagehelper.Page;
  import com.github.pagehelper.PageHelper;
  import com.sky.constant.MessageConstant;
  import com.sky.context.BaseContext;
  import com.sky.dto.*;
  import com.sky.entity.AddressBook;
  import com.sky.entity.OrderDetail;
  import com.sky.entity.Orders;
  import com.sky.entity.ShoppingCart;
  import com.sky.exception.AddressBookBusinessException;
  import com.sky.exception.OrderBusinessException;
  import com.sky.exception.ShoppingCartBusinessException;
  import com.sky.mapper.AddressBookMapper;
  import com.sky.mapper.OrderDetailMapper;
  import com.sky.mapper.OrderMapper;
  import com.sky.mapper.ShoppingCartMapper;
  import com.sky.result.PageResult;
  import com.sky.service.OrderService;
  import com.sky.utils.WeChatPayUtil;
  import com.sky.vo.OrderPaymentVO;
  import com.sky.vo.OrderStatisticsVO;
  import com.sky.vo.OrderSubmitVO;
  import com.sky.vo.OrderVO;
  import com.sky.websocket.WebSocketServer;
  import lombok.extern.slf4j.Slf4j;
  import org.springframework.beans.BeanUtils;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  import org.springframework.transaction.annotation.Transactional;
  import org.springframework.util.CollectionUtils;
  
  import java.math.BigDecimal;
  import java.time.LocalDateTime;
  import java.util.*;
  import java.util.stream.Collectors;
  
  @Service
  @Slf4j
  public class OrderServiceImpl implements OrderService {
  
      @Autowired
      private OrderMapper orderMapper;
  
      @Autowired
      private OrderDetailMapper orderDetailMapper;
  
      @Autowired
      private AddressBookMapper addressBookMapper;
  
      @Autowired
      private ShoppingCartMapper shoppingCartMapper;
  
      @Autowired
      private WeChatPayUtil weChatPayUtil;
  
      // @Autowired
      // private UserMapper userMapper;
  
      @Autowired
      private WebSocketServer webSocketServer;
  
      /**
       * 用户下单
       * 
       * @param ordersSubmitDTO
       * @return
       */
      @Override
      @Transactional
      public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
          // 业务异常处理，地址为空、购物车为空
          AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
          if (addressBook == null) {
              // 抛出异常
              throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
          }
          Long userId = BaseContext.getCurrentId();
          ShoppingCart shoppingCart = new ShoppingCart();
          shoppingCart.setUserId(userId);
          List<ShoppingCart> cartList = shoppingCartMapper.list(shoppingCart);
          if (cartList == null || cartList.isEmpty()) {
              // 抛出异常
              throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
          }
  
          // 订单表插入一条数据
          Orders orders = new Orders();
          BeanUtils.copyProperties(ordersSubmitDTO, orders);
          orders.setOrderTime(LocalDateTime.now());
          orders.setPayStatus(Orders.UN_PAID);
          orders.setStatus(Orders.PENDING_PAYMENT);
          orders.setNumber(String.valueOf(System.currentTimeMillis()));
          orders.setPhone(addressBook.getPhone());
          orders.setConsignee(addressBook.getConsignee());
          orders.setUserId(userId);
  
          orderMapper.insert(orders);
  
          // 订单详情表插入多条数据
          List<OrderDetail> orderDetailList = new ArrayList<>();
          cartList.forEach(cart -> {
              OrderDetail orderDetail = new OrderDetail();
              BeanUtils.copyProperties(cart, orderDetail);
              orderDetail.setOrderId(orders.getId());
              orderDetailList.add(orderDetail);
          });
          orderDetailMapper.insertBatch(orderDetailList);
  
          // 清空购物车
          shoppingCartMapper.deleteByUserId(userId);
  
          // 返回 VO
          OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                  .id(orders.getId())
                  .orderTime(orders.getOrderTime())
                  .orderNumber(orders.getNumber())
                  .orderAmount(orders.getAmount())
                  .build();
  
          return orderSubmitVO;
      }
  
      /**
       * 订单支付
       *
       * @param ordersPaymentDTO
       * @return
       */
      public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
          // 当前登录用户id
          // Long userId = BaseContext.getCurrentId();
          // User user = userMapper.getById(userId);
  
          // 直接调用paySuccess方法，模拟支付成功
          paySuccess(ordersPaymentDTO.getOrderNumber());
  
          // 调用微信支付接口，生成预支付交易单
          // JSONObject jsonObject = weChatPayUtil.pay(
          // ordersPaymentDTO.getOrderNumber(), // 商户订单号
          // new BigDecimal(0.01), // 支付金额，单位 元
          // "苍穹外卖订单", // 商品描述
          // user.getOpenid() // 微信用户的openid
          // );
  
          // if (jsonObject.getString("code") != null &&
          // jsonObject.getString("code").equals("ORDERPAID")) {
          // throw new OrderBusinessException("该订单已支付");
          // }
  
          // OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
          // vo.setPackageStr(jsonObject.getString("package"));
  
          // return vo;
          return null;
      }
  
      /**
       * 支付成功，修改订单状态
       *
       * @param outTradeNo
       */
      public void paySuccess(String outTradeNo) {
  
          // 根据订单号查询订单
          Orders ordersDB = orderMapper.getByNumber(outTradeNo);
  
          // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
          Orders orders = Orders.builder()
                  .id(ordersDB.getId())
                  .status(Orders.TO_BE_CONFIRMED)
                  .payStatus(Orders.PAID)
                  .checkoutTime(LocalDateTime.now())
                  .build();
  
          orderMapper.update(orders);
  
          // 通过websocket通知商家
          Map<String, Object> map = new HashMap<>();
          map.put("type", 1); // 1:来单通知
          map.put("orderId", ordersDB.getId());
          map.put("content", "订单号: " + outTradeNo);
          String msg = JSON.toJSONString(map);
          webSocketServer.sendToAllClient(msg);
      }
  
      /**
       * 查询历史订单
       *
       * @param page
       * @param pageSize
       * @param status
       * @return
       */
      @Override
      public PageResult<OrderVO> pageQueryByUser(int page, int pageSize, Integer status) {
          // 设置分页
          PageHelper.startPage(page, pageSize);
  
          OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
          ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
          ordersPageQueryDTO.setStatus(status);
  
          // 分页条件查询
          Page<Orders> pageOrders = orderMapper.pageQuery(ordersPageQueryDTO);
  
          List<OrderVO> list = new ArrayList<>();
  
          // 查询出订单明细，并封装入OrderVO进行响应
          if (pageOrders != null && pageOrders.getTotal() > 0) {
              for (Orders orders : pageOrders) {
                  Long orderId = orders.getId();// 订单id
  
                  // 查询订单明细
                  List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
  
                  OrderVO orderVO = new OrderVO();
                  BeanUtils.copyProperties(orders, orderVO);
                  orderVO.setOrderDetailList(orderDetails);
  
                  list.add(orderVO);
              }
          }
          long total = Optional.ofNullable(pageOrders).map(Page::getTotal).orElse(0L);
          return new PageResult<>(total, list);
      }
  
      /**
       * 查询订单详情
       *
       * @param id
       * @return
       */
      public OrderVO details(Long id) {
          // 根据id查询订单
          Orders orders = orderMapper.getById(id);
  
          // 查询该订单对应的菜品/套餐明细
          List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
  
          // 将该订单及其详情封装到OrderVO并返回
          OrderVO orderVO = new OrderVO();
          BeanUtils.copyProperties(orders, orderVO);
          orderVO.setOrderDetailList(orderDetailList);
  
          return orderVO;
      }
  
      /**
       * 用户取消订单
       *
       * @param id
       */
      public void userCancelById(Long id) throws Exception {
          // 根据id查询订单
          Orders ordersDB = orderMapper.getById(id);
  
          // 校验订单是否存在
          if (ordersDB == null) {
              throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
          }
  
          // 订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
          if (ordersDB.getStatus() > 2) {
              throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
          }
  
          Orders orders = new Orders();
          orders.setId(ordersDB.getId());
  
          // 订单处于待接单状态下取消，需要进行退款
          if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
              // 调用微信支付退款接口
             /* weChatPayUtil.refund(
                      ordersDB.getNumber(), // 商户订单号
                      ordersDB.getNumber(), // 商户退款单号
                      new BigDecimal(0.01), // 退款金额，单位 元
                      new BigDecimal(0.01));// 原订单金额*/
  
              // 支付状态修改为 退款
              orders.setPayStatus(Orders.REFUND);
          }
  
          // 更新订单状态、取消原因、取消时间
          orders.setStatus(Orders.CANCELLED);
          orders.setCancelReason("用户取消");
          orders.setCancelTime(LocalDateTime.now());
          orderMapper.update(orders);
      }
  
      /**
       * 再来一单
       *
       * @param id
       */
      public void repetition(Long id) {
          // 查询当前用户id
          Long userId = BaseContext.getCurrentId();
  
          // 根据订单id查询当前订单详情
          List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
  
          // 将订单详情对象转换为购物车对象
          List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
              ShoppingCart shoppingCart = new ShoppingCart();
  
              // 将原订单详情里面的菜品信息重新复制到购物车对象中
              BeanUtils.copyProperties(x, shoppingCart, "id");
              shoppingCart.setUserId(userId);
              shoppingCart.setCreateTime(LocalDateTime.now());
  
              return shoppingCart;
          }).collect(Collectors.toList());
  
          // 将购物车对象批量添加到数据库
          shoppingCartMapper.insertBatch(shoppingCartList);
      }
  
      /**
       * 订单搜索
       *
       * @param ordersPageQueryDTO
       * @return
       */
      public PageResult<OrderVO> conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
          PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
  
          Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
  
          // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
          List<OrderVO> orderVOList = getOrderVOList(page);
  
          return new PageResult<>(page.getTotal(), orderVOList);
      }
  
      private List<OrderVO> getOrderVOList(Page<Orders> page) {
          // 需要返回订单菜品信息，自定义OrderVO响应结果
          List<OrderVO> orderVOList = new ArrayList<>();
  
          List<Orders> ordersList = page.getResult();
          if (!CollectionUtils.isEmpty(ordersList)) {
              for (Orders orders : ordersList) {
                  // 将共同字段复制到OrderVO
                  OrderVO orderVO = new OrderVO();
                  BeanUtils.copyProperties(orders, orderVO);
                  String orderDishes = getOrderDishesStr(orders);
  
                  // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                  orderVO.setOrderDishes(orderDishes);
                  orderVOList.add(orderVO);
              }
          }
          return orderVOList;
      }
  
      /**
       * 根据订单id获取菜品信息字符串
       *
       * @param orders
       * @return
       */
      private String getOrderDishesStr(Orders orders) {
          // 查询订单菜品详情信息（订单中的菜品和数量）
          List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
  
          // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
          List<String> orderDishList = orderDetailList.stream().map(x -> {
              String orderDish = x.getName() + "*" + x.getNumber() + ";";
              return orderDish;
          }).collect(Collectors.toList());
  
          // 将该订单对应的所有菜品信息拼接在一起
          return String.join("", orderDishList);
      }
  
      /**
       * 各个状态的订单数量统计
       *
       * @return
       */
      public OrderStatisticsVO statistics() {
          // 根据状态，分别查询出待接单、待派送、派送中的订单数量
          Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
          Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
          Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
  
          // 将查询出的数据封装到orderStatisticsVO中响应
          OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
          orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
          orderStatisticsVO.setConfirmed(confirmed);
          orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
          return orderStatisticsVO;
      }
  
      /**
       * 接单
       *
       * @param ordersConfirmDTO
       */
      public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
          Orders orders = Orders.builder()
                  .id(ordersConfirmDTO.getId())
                  .status(Orders.CONFIRMED)
                  .build();
  
          orderMapper.update(orders);
      }
  
      /**
       * 拒单
       *
       * @param ordersRejectionDTO
       */
      public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
          // 根据id查询订单
          Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());
  
          // 订单只有存在且状态为2（待接单）才可以拒单
          if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
              throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
          }
  
          // 支付状态
          Integer payStatus = ordersDB.getPayStatus();
          if (payStatus == Orders.PAID) {
              // 用户已支付，需要退款
              /*String refund = weChatPayUtil.refund(
                      ordersDB.getNumber(),
                      ordersDB.getNumber(),
                      new BigDecimal(0.01),
                      new BigDecimal(0.01));
              log.info("申请退款：{}", refund);*/
              log.info("申请退款：{}");
          }
  
          // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
          Orders orders = new Orders();
          orders.setId(ordersDB.getId());
          orders.setStatus(Orders.CANCELLED);
          orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
          orders.setCancelTime(LocalDateTime.now());
  
          orderMapper.update(orders);
      }
  
      /**
       * 取消订单
       *
       * @param ordersCancelDTO
       */
      public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
          // 根据id查询订单
          Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
  
          // 支付状态
          Integer payStatus = ordersDB.getPayStatus();
          if (payStatus == 1) {
              // 用户已支付，需要退款
              /*String refund = weChatPayUtil.refund(
                      ordersDB.getNumber(),
                      ordersDB.getNumber(),
                      new BigDecimal(0.01),
                      new BigDecimal(0.01));
              log.info("申请退款：{}", refund);*/
              log.info("申请退款：{}");
          }
  
          // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
          Orders orders = new Orders();
          orders.setId(ordersCancelDTO.getId());
          orders.setStatus(Orders.CANCELLED);
          orders.setCancelReason(ordersCancelDTO.getCancelReason());
          orders.setCancelTime(LocalDateTime.now());
          orderMapper.update(orders);
      }
  
      /**
       * 派送订单
       *
       * @param id
       */
      public void delivery(Long id) {
          // 根据id查询订单
          Orders ordersDB = orderMapper.getById(id);
  
          // 校验订单是否存在，并且状态为3
          if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
              throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
          }
  
          Orders orders = new Orders();
          orders.setId(ordersDB.getId());
          // 更新订单状态,状态转为派送中
          orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
  
          orderMapper.update(orders);
      }
  
      /**
       * 完成订单
       *
       * @param id
       */
      public void complete(Long id) {
          // 根据id查询订单
          Orders ordersDB = orderMapper.getById(id);
  
          // 校验订单是否存在，并且状态为4
          if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
              throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
          }
  
          Orders orders = new Orders();
          orders.setId(ordersDB.getId());
          // 更新订单状态,状态转为完成
          orders.setStatus(Orders.COMPLETED);
          orders.setDeliveryTime(LocalDateTime.now());
  
          orderMapper.update(orders);
      }
  
      /**
       * 用户催单
       *
       * @param id
       */
      public void reminder(Long id) {
          // 查询订单是否存在
          Orders orders = orderMapper.getById(id);
          if (orders == null) {
              throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
          }
  
          // 基于WebSocket实现催单
          Map<String, Object> map = new HashMap<>();
          map.put("type", 2);// 2代表用户催单
          map.put("orderId", id);
          map.put("content", "订单号：" + orders.getNumber());
          webSocketServer.sendToAllClient(JSON.toJSONString(map));
      }
  
  }
  