var $ = function() { //一個hacks
  return document.querySelectorAll.apply(document, arguments);
}
var waterFall = (function(){
  //初始化布局
  var arrHeight = []; //列的高度
  var columns = function() { //計算頁面最多可以放多少列
      var bodyW = $('#container')[0].clientWidth,
        pinW = $(".column")[0].offsetWidth;
      return Math.floor(bodyW / pinW);
    }
    //設置瀑布流居中
  var getHtml = function() {
      var cols = $('.column'), //獲得已有的列數(shù)
        arrHtml = [];
      for (var i = 0, col; col = cols[i++];) {
        var htmls = col.innerHTML.match(/<img(?:.|\n|\r|\s)*?p>/gi); //獲取一個columns的
        arrHtml = arrHtml.concat(htmls);
      }
      return arrHtml;
    }
    //獲得數(shù)組中最低的高度
  var getMinIndex = function() { //獲得最小高度的index
    var minHeight = Math.min.apply(null, arrHeight); //獲得最小高度
    for (var i in arrHeight) {
      if (arrHeight[i] === minHeight) {
        return i;
      }
    }
  }
  var createCol = function() {
      var cols = columns(), //獲得列數(shù)
        contain = $("#container")[0];
      contain.innerHTML = ''; //清空數(shù)據(jù)
      for (var i = 0; i < cols; i++) {
        var span = document.createElement("span");
        span.className = "column";
        contain.appendChild(span);
      }
    }
    //初始化列的高度
  var initHeight = function() {
      var cols = columns(),
        arr = [];
      for (var i = 0; i < cols; i++) {
        arr.push(0);
      }
      arrHeight = arr;
    }
   //創(chuàng)建一個ele并且添加到最小位置
  var createArticle = function(html){
    var cols = $('.column'),
      index = getMinIndex(),
      ele = document.createElement('article');
    ele.className = "panel";;
    ele.innerHTML = html;
    cols[index].appendChild(ele);
    arrHeight[index] += ele.clientHeight;
  }
  //遍歷獲得的html然后添加到頁面中
  var reloadImg = function(htmls) {
    for (var i = 0, html, index; html = htmls[i++];) {
      createArticle(html);
    }

  }
  var onload = function() {
      var contain = $("#container")[0], //獲得容器
        arrHtml = getHtml(); //獲得現(xiàn)有的所有瀑布流塊
      //創(chuàng)建列，然后進行加載
      createCol();
      //初始化arrHeight
      initHeight();
      //進行頁面的重繪
      reloadImg(arrHtml);
      return this;
    }
})();

 var isLoad=function() { //是否可以進行加載
    var scrollTop = document.documentElement.scrollTop || document.body.scrollTop,
      wholeHeight = document.documentElement.clientHeight || document.body.clientHeight,
      point = scrollTop + wholeHeight; //頁面底部距離header的距離
    var lastHei = Math.min.apply(null,arrHeight);
    return (lastHei < point) ? true : false;
  }

  var dealScroll = (function(){
    window.onscroll = ()=>{dealScroll();}
    var container = $('#container')[0];
    return function(){
      if(isLoad()){
        for(var i = 0,html,data;data = dataInt[i++]; ){
          html = tpl.temp(data.src); //獲得數(shù)據(jù)然后添加模板
          createArticle(html);
        }
      }
      return this;
    }
  })();

 var resize = (function(){
    window.onresize = ()=>{resize();};
    var flag;
    return function(){
      clearTimeout(flag);
      flag = setTimeout(()=>{onload();},500);
      return this;
    }