const app = getApp();
Page({
    data: {
      course:{
        name:"**课堂邀请",
        teacher_name:"点击最下方按钮",
        teacher_school:"登陆后查看"
      },
      user:{},
      status:0,
      eduImgDir:global.config.eduImgDir
    },
    onImgError(e){
      console.log("onImgError", e);
      let path = this.getPageUrl();
      wx.cloud.callFunction({ name: "openapi", data: { action:"getWXACode", path}})
        .then(res=>{
          this.setData({invite_code_url:""});
          this.setData({invite_code_url: res.result})
        });
    },
    login:function(){
      app.navigateTo({
        url: '{login}',
      });
    },
    onTapCode(){
      let data = this.data.course.invite_code || this.data.options.invite_code;
      wx.setClipboardData({
        data
      })
    },
    preview(){
      wx.previewImage({
        urls: [this.data.invite_code_url],
      })
    },
    joinCourse: function(event) {
      //@todo 助教加入..
      let invite_code = this.data.course.invite_code||this.data.options.invite_code;
      let data = { invite_code, student: 1};
      if (this.data.course.code_halt){
        wx.showToast({
          title: '＞︿＜\n邀请码已经停用了',
          icon:"none"
        });
        return;
      }
      app.api("courses.apply_to_join_course")({ ...data })
        .then(res => {
          app.showMsg(res);
          wx.redirectTo({
            url: "../course/course?course_id=" + res.course_id
          });
        })
      .catch(app.showError)
    },
    getPageUrl(){
      let { course_id, _invite_code } = this.data.options;
      let {invite_code=_invite_code} = this.data.course;
      return app.getPageUrl(`{course_invite}?course_id=${course_id}&invite_code=${invite_code}`);
    },
    getWxaCodeUrl(){
      let url = this.getPageUrl();
      return global.config.imgDir+"wxacode/"+ url.replace(/[\/?&]/g, "_")+".jpeg";
    },
    pull_course(){
      app.api("weapps.courses.basic_info")({ course_id:this.options.course_id })
        .then(({course}) => {
        this.setData({ course, status: 200});
      }).catch(e=>{
        app.showError(e);
        this.setData({status:-1})
      });
  },
  onLoad: function (options) {
    this.setData({options});
    this.setData({status:1});
    this.pull_course();
    let invite_code_url = this.getWxaCodeUrl();
    this.setData({ invite_code_url});
  },
  onShow:function(){
    app.syncUser()
    .then(({user})=>{
      this.setData({user});
    })
    if(this.data.status==-1)
      this.pull_course()
  },
  onShareAppMessage(){

  }
})