const app = getApp();
Component({
  properties: {

  },

  data: {
    shixun_list:[]
  },
  pageLifetimes:{
    show(){
      /*
      let {status} = this.data;
      console.log("show",status);
      if(status<0)
        this.pullShixuns({refresh:2 ,showError:0});
      //limit param somehow don't work! 
      */
    }
  },
  attached(){
    this.options = {page:1, limit: 10};
    let key = "cache-shixun_list"
    let cache_shixun_list = wx.getStorageSync(key);
    if(cache_shixun_list)
      this.setData({shixun_list: cache_shixun_list});
    else
      wx.showLoading({title: '努力加载中'});
    this.pullShixuns({refresh:1, showError: !cache_shixun_list})
    .then(res=>{
      if(res.shixun_list)
        wx.setStorageSync(key, res.shixun_list);
    })
    this.selects = {};
  },
  methods: {
    clear(){
      this.setData({keyword:"", showClear:0});
      this.options.keyword = "";
      this.pullShixuns({refresh:1, showError: 0});
    },
    onInput(e){
      let {detail:{value}} = e;
      if(this.data.showClear&&!value){
        this.clear();
      }else if(!this.data.showClear&&value){
        this.setData({showClear:1});
      }
    },
    onSelect(e){
      let {detail} = e;
      this.selects[detail.name] = detail.value;
      if(detail.value&&!this.data.select)
        this.setData({select: true});
      else if(!detail.value&&!this.data.select){
        console.error("something unexpected happens");
      }
      else if(detail.from=='radio'){
        let length = 0;
        for(var i in this.selects){
          if(this.selects[i])
            length++;
        }
        if(length==0){
          this.setData({select: false});
          this.selects = {};
        }
      }
    },
    reset(e){
      this.setData({select:false});
      this.selects = {}
    },
    onSubmit(e){
      if(!this.data.select)
        this.setData({select: true});
      else{
        let shixun_ids = [];
        for(var i in this.selects){
          if(this.selects[i])
            shixun_ids.push(parseInt(i));
        }
        if(shixun_ids.length==0){
          wx.showToast({
            title: '请选择实训',icon:"none"
          })
        }else{
          this.setData({shixun_ids});
          this.setData({showSendDialog: true});
        }
      }
    },
    search(e){ 
      let {detail:{value}} = e;
      if(this.options.keyword!=value){
        this.options.keyword = value;
        this.pullShixuns({refresh:1});
      }
    },
    onPullDownRefresh(){
      this.pullShixuns({refresh:1});
    },
    onReachBottom(){
      let {status} = this.data;
      if(status!=205&&status!=204)
        this.pullShixuns();
    },
    pullShixuns({refresh=0, showError=1}={}){
      if(refresh){
        if(refresh==1){
          this.options.page = 1;
          var { options } = this;
        }else if(refresh==2){
          var {page, limit} = this.options;
          var options = {...this.options,page:1, limit: page*limit};
        }
      }else{
        this.options.page++;
        var {options} = this;
      }
      wx.showNavigationBarLoading();
      return app.api("shixun_lists")(options).then(res=>{
        let {shixun_list} = res;
        let length = shixun_list.length;
        if (!refresh){
          shixun_list = this.data.shixun_list.concat(shixun_list);
          var status = length>0?200:204;
        }else{
          this.selects = {};
          this.setData({select: false});
          var status = length>0?200:205;
        }
        this.setData({ shixun_list, status}, wx.hideNavigationBarLoading);
        wx.hideLoading();
        return res;
      }).catch(e=>{
        console.log("error!!!!",e, showError)
        this.setData({status:e.code}, wx.hideNavigationBarLoading);
        wx.hideLoading();
        if(showError)
          app.showError(e);
        return e;
      })
    }
  }
})