// pages/addclass/addclass.js
const AV = require("../../lib/av-live-query-weapp-min")
const Presence = require("../../model/presence")
const Class = require("../../model/class")
const { jsonify } = require('../../utils/leancloudutils');

Page({

  /**
   * 页面的初始数据
   */
  classes: [],
  data: {
    new_classname:'',
    new_class_teacher_username: '',
    classes: []
  },
  updateName: function ({detail: {value}}){
    this.setData({new_classname:value});
  },
  create_class: function(event){
    const {new_classname} = this.data;
    class_ = new Class({
      name: new_classname,
      teacher: AV.User.current()
    })
    presence = new Presence({
      user: AV.User.current(),
      class: class_
    });
    wx.showLoading({
      title: '请稍候',
    })
    presence.save().then(()=>{
      wx.hideLoading();
      wx.showToast({
        title: '创建成功,可在首页课程列表以教师身份进入课堂',
        icon:"none",
        duration: 4000
      });
      this.setData({new_classname: ""});
    },
    ()=>{
      wx.hideLoading();
      wx.showToast({
        title: '操作失败',
        icon: "none"
      });
    });
  },
  add_class:function(event){
    class_id = event.currentTarget.dataset.id;
    class_name = event.currentTarget.dataset.name;
    pull_presences = this.pull_presences.bind(this);
    wx.showModal({
      title: '确认',
      content: '是否加入学习'+class_name,
      success(res) {
        if (res.confirm) {
          class_ = AV.Object.createWithoutData("Class_", class_id);
          presence = new Presence({
            user: AV.User.current(),
            class: class_
          });
          wx.showLoading({
            title: '请稍候',
          })
          presence.save().then(()=>{
            pull_presences();
            wx.hideLoading();
            wx.showToast({
              title: '加入成功',
              icon: "success"
            })
            },
            () => {
              wx.hideLoading();
              wx.showToast({
                title: '加入失败',
                icon: "none"
              })
            }).catch(error=>console.error(error.message));
        } 
      }
    })
  },

  pull_classes: function(){
    query = new AV.Query("Class_");
    return query.find().then(classes=>{console.log(classes);this.classes=classes});
  },
  pull_presences: function(){
    query = new AV.Query("Presence");
    query.equalTo("user", AV.User.current());
    query.include("class");
    query.find().then(this.set_presences.bind(this));
  },
  set_presences: function(presences){
    console.log("set_presences");
    console.log(presences);
    present_class_ids = presences.map(presence=>presence.get("class").id);
    classes =this.classes.map(class_=>{
      if(present_class_ids.indexOf(class_.id)>-1){
        class_.set("present", true);
      }else{
        class_.set("present", false);
      }
      return class_;
    });
    console.log(classes);
    this.setData(jsonify({classes}));
  },
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    this.pull_classes().then(this.pull_presences);
    this.setData({new_class_teacher_username: AV.User.current().get("username")});
  },

  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady: function () {

  },

  /**
   * 生命周期函数--监听页面显示
   */
  onShow: function () {

  },

  /**
   * 生命周期函数--监听页面隐藏
   */
  onHide: function () {

  },

  /**
   * 生命周期函数--监听页面卸载
   */
  onUnload: function () {

  },

  /**
   * 页面相关事件处理函数--监听用户下拉动作
   */
  onPullDownRefresh: function () {
    this.pull_classes().then(this.pull_presences);
  },

  /**
   * 页面上拉触底事件的处理函数
   */
  onReachBottom: function () {

  },

  /**
   * 用户点击右上角分享
   */
  onShareAppMessage: function () {

  }
})