content: package com.sky.service.impl;
  
  import com.sky.dto.GoodsSalesDTO;
  import com.sky.entity.Orders;
  import com.sky.mapper.OrderMapper;
  import com.sky.mapper.UserMapper;
  import com.sky.service.ReportService;
  import com.sky.service.WorkspaceService;
  import com.sky.vo.*;
  import org.apache.commons.lang.StringUtils;
  import org.apache.poi.xssf.usermodel.XSSFRow;
  import org.apache.poi.xssf.usermodel.XSSFSheet;
  import org.apache.poi.xssf.usermodel.XSSFWorkbook;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  
  import javax.servlet.ServletOutputStream;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  import java.io.InputStream;
  import java.time.LocalDate;
  import java.time.LocalDateTime;
  import java.time.LocalTime;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.stream.Collectors;
  
  /**
   * @version 1.0
   * @Author Imak
   * @Date 2024/8/15 13:25
   * @注释
   */
  @Service
  public class ReportServiceImpl implements ReportService {
      @Autowired
      private OrderMapper orderMapper;
      @Autowired
      private UserMapper userMapper;
  
      @Autowired
      private WorkspaceService workspaceService;
      /**
       * 统计营业额
       * @param begin
       * @param end
       * @return
       */
      public TurnoverReportVO getTurnover(LocalDate begin, LocalDate end) {
          List<LocalDate> dateList = new ArrayList<>();
          dateList.add(begin);
  
          while (!begin.equals(end)){
              begin = begin.plusDays(1);//日期计算，获得指定日期后1天的日期
              dateList.add(begin);
          }
  
          List<Double> turnoverList = new ArrayList<>();
          for (LocalDate date : dateList) {
              LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
              LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
              Map map = new HashMap();
              map.put("status", Orders.COMPLETED);
              map.put("begin",beginTime);
              map.put("end", endTime);
              Double turnover = orderMapper.sumByMap(map);
              turnover = turnover == null ? 0.0 : turnover;
              turnoverList.add(turnover);
          }
  
          //数据封装
          return TurnoverReportVO.builder()
                  .dateList(StringUtils.join(dateList,","))
                  .turnoverList(StringUtils.join(turnoverList,","))
                  .build();
      }
  
      /**
       * 用户数据统计
       * @param begin
       * @param end
       * @return
       */
      public UserReportVO getUser(LocalDate begin, LocalDate end) {
          List<LocalDate> dateList = new ArrayList<>();
          dateList.add(begin);
  
          while (!begin.equals(end)){
              begin = begin.plusDays(1);//日期计算，获得指定日期后1天的日期
              dateList.add(begin);
          }
          List<Integer> newUserList = new ArrayList<>();
          List<Integer> totalUserList=new ArrayList<>();
          for (LocalDate date : dateList) {
              LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
              LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
              //新增用户数量 select count(id) from user where create_time > ? and create_time < ?
              Integer newUser = getUserCount(beginTime, endTime);
              //总用户数量 select count(id) from user where  create_time < ?
              Integer totalUser = getUserCount(null, endTime);
  
              newUserList.add(newUser);
              totalUserList.add(totalUser);
          }
          return UserReportVO.builder()
                  .dateList(StringUtils.join(dateList,","))
                  .newUserList(StringUtils.join(newUserList,","))
                  .totalUserList(StringUtils.join(totalUserList,","))
                  .build();
  
      }
  
      /**
       * 统计订单数量
       * @param begin
       * @param end
       * @return
       */
      public OrderReportVO getOrders(LocalDate begin, LocalDate end) {
          List<LocalDate> dateList = new ArrayList<>();
          dateList.add(begin);
  
          while (!begin.equals(end)){
              begin = begin.plusDays(1);
              dateList.add(begin);
          }
          //每天订单总数集合
          List<Integer> orderCountList = new ArrayList<>();
          //每天有效订单数集合
          List<Integer> validOrderCountList = new ArrayList<>();
          for (LocalDate date : dateList) {
              LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
              LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
              //查询每天的总订单数 select count(id) from orders where order_time > ? and order_time < ?
              Integer orderCount = getOrderCount(beginTime, endTime, null);
  
              //查询每天的有效订单数 select count(id) from orders where order_time > ? and order_time < ? and status = ?
              Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
  
              orderCountList.add(orderCount);
              validOrderCountList.add(validOrderCount);
          }
          //时间区间内的总订单数
          Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
          //时间区间内的总有效订单数
          Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
          //订单完成率
          Double orderCompletionRate = 0.0;
          if(totalOrderCount != 0){
              orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
          }
          return OrderReportVO.builder()
                  .dateList(StringUtils.join(dateList, ","))
                  .orderCountList(StringUtils.join(orderCountList, ","))
                  .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                  .totalOrderCount(totalOrderCount)
                  .validOrderCount(validOrderCount)
                  .orderCompletionRate(orderCompletionRate)
                  .build();
      }
  
      /**
       * 销量统计
       * @param begin
       * @param end
       * @return
       */
      public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
          LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
          LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
          List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.getSalesTop10(beginTime, endTime);
          String nameList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList()),",");
          String numberList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList()),",");
          return SalesTop10ReportVO.builder()
                  .nameList(nameList)
                  .numberList(numberList)
                  .build();
      }
  
      /**
       * 根据时间区间统计指定状态的订单数量
       * @param beginTime
       * @param endTime
       * @param status
       * @return
       */
      private Integer getOrderCount(LocalDateTime beginTime, LocalDateTime endTime, Integer status) {
          Map map = new HashMap();
          map.put("status", status);
          map.put("begin",beginTime);
          map.put("end", endTime);
          return orderMapper.countByMap(map);
      }
  
      /**
       * 根据时间区间统计用户数量
       * @param beginTime
       * @param endTime
       * @return
       */
      private Integer getUserCount(LocalDateTime beginTime, LocalDateTime endTime) {
          Map map = new HashMap();
          map.put("begin",beginTime);
          map.put("end", endTime);
          return userMapper.countByMap(map);
      }
  
      /**导出近30天的运营数据报表
       * @param response
       **/
      public void exportBusinessData(HttpServletResponse response) {
          LocalDate begin = LocalDate.now().minusDays(30);
          LocalDate end = LocalDate.now().minusDays(1);
          //查询概览运营数据，提供给Excel模板文件
          BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
          InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
          try {
              //基于提供好的模板文件创建一个新的Excel表格对象
              XSSFWorkbook excel = new XSSFWorkbook(inputStream);
              //获得Excel文件中的一个Sheet页
              XSSFSheet sheet = excel.getSheet("Sheet1");
  
              sheet.getRow(1).getCell(1).setCellValue(begin + "至" + end);
              //获得第4行
              XSSFRow row = sheet.getRow(3);
              //获取单元格
              row.getCell(2).setCellValue(businessData.getTurnover());
              row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
              row.getCell(6).setCellValue(businessData.getNewUsers());
              row = sheet.getRow(4);
              row.getCell(2).setCellValue(businessData.getValidOrderCount());
              row.getCell(4).setCellValue(businessData.getUnitPrice());
              for (int i = 0; i < 30; i++) {
                  LocalDate date = begin.plusDays(i);
                  //准备明细数据
                  businessData = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                  row = sheet.getRow(7 + i);
                  row.getCell(1).setCellValue(date.toString());
                  row.getCell(2).setCellValue(businessData.getTurnover());
                  row.getCell(3).setCellValue(businessData.getValidOrderCount());
                  row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                  row.getCell(5).setCellValue(businessData.getUnitPrice());
                  row.getCell(6).setCellValue(businessData.getNewUsers());
              }
              //通过输出流将文件下载到客户端浏览器中
              ServletOutputStream out = response.getOutputStream();
              excel.write(out);
              //关闭资源
              out.flush();
              out.close();
              excel.close();
  
          }catch (IOException e){
              e.printStackTrace();
          }
      }
  }
  