const app = getApp();
// status:[0, 204, 205, 200]
Component({
  properties: {

  },

  data: {
    shixuns:[],
    status:0,
    cates:[
      {text:'全部',value:""},
      {text:'我学习的',value:"study"},
      {text:'我管理的',value:"manage"},
      {text:"我收藏的",value:"collect"}
    ]
  },
  pageLifetimes: {
    show(){
      this.refresh();
    }
  },
  attached(){
    this.options = {page:1, per_page:16};
    this.refresh();
  },
  methods: {
    onCateChange({detail:{value}}){
      ;
      this.options.category = value.value
      this.pullPaths({refresh:1});
    },
    refresh(){
      app.syncUser()
        .then(res => {
          if (res.user.user_id != this.user_id) {
            if(res.user_id==2)
              this.setData({shixuns:[]})
            else
              this.pullPaths({ refresh: 1 })
            this.user_id = res.user.user_id;
          }else if(this.data.status==200){
            this.pullPaths({refresh:2});
          }
        })
    },
    setStatus(status){
      this.setData({status});
    },
    pullPaths({refresh=0}={}){
      if(refresh){
        if(refresh==1){
          this.options.page = 1;
          var { options } = this;
        }else if(refresh==2){
          var {page, per_page, category=""} = this.options;
          var options = {page:1, per_page: page*per_page, category};
        }
        //this.setStatus(1);
      }else{
        this.options.page++;
        var {options} = this;
        //this.setStatus(100);
      }
      return app.api("users.subjects")(options).then(({subjects})=>{
        let length = subjects.length;
        if (!refresh){
          subjects = this.data.subjects.concat(subjects);
          var status = length>0?200:204;
        }else{
          var status = length>0?200:205;
        }
        this.setData({ subjects, status});
      }).catch(e=>{
        this.setData({subjects:[], status:e.code});
      })
    },
    onPullDownRefresh(){
      this.pullPaths({refresh:2});
    },
    onReachBottom(){
      
      if(this.data.status==200)
        this.pullPaths({refresh:0});
    }
  }
})