package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.common.constant.MessageConstant;
import com.sky.common.context.BaseContext;
import com.sky.common.exception.AddressBookBusinessException;
import com.sky.common.exception.OrderBusinessException;
import com.sky.common.exception.ShoppingCartBusinessException;
import com.sky.common.result.PageResult;
import com.sky.common.utils.WeChatPayUtil;
import com.sky.mapper.*;
import com.sky.pojo.dto.*;
import com.sky.pojo.entity.*;
import com.sky.pojo.vo.OrderPaymentVO;
import com.sky.pojo.vo.OrderStatisticsVO;
import com.sky.pojo.vo.OrderSubmitVO;
import com.sky.pojo.vo.OrderVO;
import com.sky.service.OrderService;
import com.sky.service.utils.CheckOutOfRangeUtils;
import com.sky.service.utils.OrderServiceImplUtils;
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 java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.stream.Collectors;

/**
 * 订单
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    WebSocketServer webSocketServer;
    @Autowired
    OrderServiceImplUtils orderServiceImplUtils;
    @Autowired
    CheckOutOfRangeUtils checkOutOfRangeUtils;
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO ordersSubmitDTO
     * @return OrderSubmitVO
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        // 异常情况的处理（收货地址为空、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        // 判断是否超出范围
        String address = addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail();
        checkOutOfRangeUtils.checkOutOfRange(address, 1L);

        Long userId = BaseContext.getUserId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        // 查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.isEmpty()) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        // 构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());

        // 向订单表插入1条数据
        orderMapper.insert(order);

        // 订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }

        // 向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);

        // 清理购物车中的数据
        shoppingCartMapper.deleteByUserId(userId);

        // 封装返回结果
        return OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();
    }

    /**
     * 订单支付
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getUserId();
        User user = userMapper.getById(userId);
        Orders orders = orderMapper.getByNumber(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(orders.getAmount().toString()), // 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;
    }

    /**
     * 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);
        // 通过客户端浏览器推送消息
        HashMap map = new HashMap<>();
        map.put("type", 1);// 1 来单提醒 2 客户催单
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号" + outTradeNo);
        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    /**
     * 历史订单
     *
     * @param pageNum  当前页
     * @param pageSize 一页大小
     * @param status   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
     * @return 订单列表
     */
    @Override
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        // 设置分页
        PageHelper.startPage(pageNum, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getUserId());
        // 分页条件查询
        Page<Orders> page = 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 (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                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);
            }
        }
        return new PageResult(page.getTotal(), list);
    }


    /**
     * 催单
     *
     * @param id 订单id
     */
    @Override
    public void reminder(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        HashMap map = new HashMap<>();
        map.put("type", 2);
        map.put("orderId", id);
        map.put("content", "订单号" + ordersDB.getNumber());

        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    /**
     * 查询订单详情
     *
     * @param id 订单id
     * @return 订单详情
     */
    @Override
    public OrderVO details(Long id) {
        // 查询订单
        Orders orders = orderMapper.getById(id);
        // 查询订单详情列表
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        // 封装 OrderVO
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 取消订单
     *
     * @param id 订单id
     */
    @Override
    public void cancel(Long id) {
        // 查找数据库
        Orders ordersDB = orderMapper.getById(id);
        // 如果存在则继续
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        // 如果订单状态>2抛出异常 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_NOT_OP);
        }
        // 订单处于待接单状态下取消，需要进行退款
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersDB, orders);
        orders.setId(id);
        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            // 调用微信退款...
            orders.setPayStatus(OrderVO.REFUND);
        }
        // 更新订单状态、时间、原因等
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 取消订单-商家
     *
     * @param dto 订单
     */
    @Override
    public void cancelBusiness(OrdersCancelDTO dto) {
        Orders ordersDB = orderMapper.getById(dto.getId());
        // 订单不存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Orders orders = new Orders();
        orders.setCancelTime(LocalDateTime.now());
        orders.setCancelReason(dto.getCancelReason());
        orders.setId(dto.getId());
        orders.setStatus(Orders.CANCELLED);

        // 更新数据
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     *
     * @param id 订单id
     */
    @Override
    public void repetition(Long id) {
        // TODO 是否超出范围
        // 查询当前用户id
        Long userId = BaseContext.getUserId();
        // 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(orderDetail -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail, 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 dto 订单详情
     * @return 分页数据
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(), dto.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(dto);
        // 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 = orderServiceImplUtils.getOrderVOList(page);
        return new PageResult(page.getTotal(), orderVOList);
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return OrderStatisticsVO
     */
    @Override
    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
        // 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        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 dto 接单请求
     */
    @Override
    public void confirm(OrdersConfirmDTO dto) {
        // 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 7 退款
        Orders orders = Orders.builder().status(Orders.CONFIRMED).id(dto.getId()).build();
        // 接单判断是否超出范围
        checkOutOfRangeUtils.checkOutOfRange(orders.getAddress(), 3L);
        orderMapper.update(orders);
    }

    /**
     * 拒单
     *
     * @param dto 拒单请求
     */
    @Override
    public void rejection(OrdersRejectionDTO dto) {
        Orders ordersDB = orderMapper.getById(dto.getId());
        // 订单为空不存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        // 订单状态为2才可以拒单
        if (!ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_NOT_OP);
        }

        // 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 = Orders.builder()
                .status(Orders.CANCELLED)
                .cancelReason(dto.getRejectionReason())
                .orderTime(LocalDateTime.now())
                .id(ordersDB.getId())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     *
     * @param id 订单id
     */
    @Override
    public void delivery(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        // 订单不能再
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        // 状态为3
        if (!ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.DELIVERY_IN_PROGRESS)
                .orderTime(LocalDateTime.now()).build();
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id 订单id
     */
    @Override
    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 = Orders.builder()
                .id(ordersDB.getId())
                // 更新订单状态,状态转为完成
                .status(Orders.COMPLETED)
                .deliveryTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }
}