Page({
    data: {
      fileList: [],
      showModal: false,
      exemptionModalVisible: false, // 控制豁免卡信息弹窗
      selectedStudent: null,
      socket: null,
      exemptionCardInfo: {},// 用于存储豁免卡信息
      questionScore: 0, // 新增变量，用于存储输入的积分
    },
  // 返回页面
  goBack() {
    wx.navigateTo({
        url: '/pages/index/index',
      });
  },
    // 选择文件（点击上传学生按钮）
    chooseFile: function() {
      const that = this;
      wx.chooseMessageFile({
        count: 1, // 选择文件的数量
        type: 'file', // 文件类型
        extension: ['xls', 'xlsx'], // 允许选择 Excel 文件
        success(res) {
          const tempFilePaths = res.tempFiles;
          if (tempFilePaths.length > 0) {
            // 上传文件
            that.uploadFile(tempFilePaths[0].path);
          } else {
            wx.showToast({
              title: '未选择文件',
              icon: 'none'
            });
          }
        }
      });
    },
  
    // 上传文件
    uploadFile: function(filePath) {
      wx.uploadFile({
        url: 'http://127.0.0.1:8000/api/upload-students/', // Django 后端 API
        filePath: filePath,
        name: 'file', // 后端接收文件的参数名
        success(res) {
          const data = JSON.parse(res.data);
          if (data.message) {
            wx.showToast({
              title: data.message,
              icon: 'success'
            });
          } else if (data.error) {
            wx.showToast({
              title: data.error,
              icon: 'none'
            });
          }
        },
        fail(err) {
          wx.showToast({
            title: '上传失败',
            icon: 'none'
          });
        }
      });
    },
   
    onLoad: function() {
      this.connectWebSocket();
    },
  
  // 建立websock连接
    connectWebSocket() {
      const socket = wx.connectSocket({
        url: 'ws://127.0.0.1:8000/ws/classroom/',
      });
  
      socket.onMessage((message) => {
        const data = JSON.parse(message.data);
        if (data.action === 'student_picked') {
          this.setData({
            selectedStudent: {
              name: data.name,
              student_id: data.student_id,
            },
            showModal: true,
          });
        }else if (data.action === 'exemption_card_used') {
          this.setData({
            exemptionCardInfo: {
              student_id: data.student_id,
              student_name: data.student_name,
              new_score: data.new_score,
            },
            exemptionModalVisible: true, // 显示豁免卡信息弹窗
          });
        }
      });
      this.setData({ socket });
    },
  // 发起点名
    pickStudent() {
      this.data.socket.send({
        data: JSON.stringify({ action: 'pick_student' }),
      });
    },
    onStudentPicked(student) {
      this.setData({
        selectedStudent: student,
        showModal: true,
      });
  
      // 发送点名结果到学生组
      this.data.socket.send({
        data: JSON.stringify({
          action: 'student_picked',
          name: student.name,
          student_id: student.student_id,
        }),
      });
    },
    //关闭点名结果弹窗
    onModalClose() {
      this.setData({
        showModal: false,
      });
    },
    
    // 关闭豁免卡信息弹窗
    onExemptionModalClose() {
      this.setData({
        exemptionModalVisible: false,
      });
    },
  
    // 进入点到模式
    goToRollCall() {
      if (!this.data.selectedStudent) {
        wx.showToast({
          title: '请先选择一个学生',
          icon: 'none',
        });
        return;
      }
      const { student_id: studentId } = this.data.selectedStudent; // 从 selectedStudent 中解构出 studentId
      wx.navigateTo({
        url: `/pages/teacher/Mode-arrive/Mode-arrive?studentId=${studentId}`,
      });
    },
  
    // 进入提问模式
    goToQuestionMode() {
      if (!this.data.selectedStudent) {
        wx.showToast({
          title: '请先选择一个学生',
          icon: 'none',
        });
        return;
      }
      const { student_id: studentId } = this.data.selectedStudent; // 从 selectedStudent 中解构出 studentId
      console.log('Navigating to question mode with studentId:', studentId);
      wx.navigateTo({
        url: `/pages/teacher/Mode-quiz/Mode-quiz?studentId=${studentId}`,
        fail: (err) => {
          console.log('跳转失败:', err);
        },
      });     
    },
  
  // 跳转到排行榜
  goTorank() {
    console.log('点击了排行榜按钮'); // 添加调试信息
    wx.navigateTo({
      url: 'pages/teacher/Trank/rank-Mode1/rank-Mode1',
    });
  },
  
  // 导出数据
  exportScores() {
    wx.request({
      url: 'http://127.0.0.1:8000/api/export_students_scores', // 后端 API 地址
      method: 'POST',
      responseType: 'arraybuffer', // 确保接收的是文件数据
      success(res) {
        if (res.statusCode === 200) {
          // 将接收到的二进制数据转换为Excel文件并下载
          const filePath = `${wx.env.USER_DATA_PATH}/students_scores.xlsx`;
          const fs = wx.getFileSystemManager();
          fs.writeFile({
            filePath,
            data: res.data,
            encoding: 'binary',
            success() {
              wx.openDocument({
                filePath,
                fileType: 'xlsx',
                success() {
                  wx.showToast({
                    title: 'Excel已下载并打开',
                    icon: 'success',
                  });
                },
                fail() {
                  wx.showToast({
                    title: '文件打开失败',
                    icon: 'none',
                  });
                }
              });
            },
            fail() {
              wx.showToast({
                title: '文件保存失败',
                icon: 'none',
              });
            }
          });
        } else {
          wx.showToast({
            title: res.data.error || '导出失败',
            icon: 'none',
          });
        }
      },
      fail() {
        wx.showToast({
          title: '请求失败，请检查网络',
          icon: 'none',
        });
      }
    });
  },
  
  });