; (function () {
  var time = null;
  var slider = function (options) {
    this.osliderwrap = options.osliderwrap;
    this.slideritems = options.slideritems;
    this.sliderlen = this.slideritems.length;
    this.yuan = options.yuan;
    this.yuanitems = options.yuanitems;
    this.btngroupleft = options.btngroupleft;
    this.btngroupright = options.btngroupright;
    this.idx = 0;
  }

  $.extend(slider.prototype, {
    init: function () {
      this.bindevent();
      this.autoplay();
    },
    bindevent: function () {
      this.osliderwrap.on('mouseenter', this.mousein);
      this.osliderwrap.on('mouseleave', $.proxy(this.mouseout, this));
      this.yuan.on('mouseenter', ".yuan-item", $.proxy(this.manslider, this));
      this.btngroupleft.on('click', $.proxy(this.handlebtnleft, this));
      this.btngroupright.on('click', $.proxy(this.handlebtnright, this))
    },

    //自动轮播
    autoplay: function () {
      time = setinterval(this.nextslide.bind(this), 4000);
    },
    //鼠标移入，清除定时器
    mousein: function () {
      clearinterval(time);
    },
    //鼠标移入，启动定时器
    mouseout: function () {
      this.autoplay();
    },
    nextslide: function () {
      if (this.idx >= this.sliderlen - 1) {
        this.idx = 0;
      } else {
        this.idx++;
      }
      this._slideaction(this.idx);
    },

    prevslide: function () {
      if (this.idx <= 0) {
        this.idx = this.sliderlen - 1;
      } else {
        this.idx--;
      }
      this._slideaction(this.idx);
    },

    howslidermove(things) {
      switch (things) {
        case 'left':
          this.prevslide();
          break;
        case 'right':
          this.nextslide();
          break;
      }
    },

    handlebtnleft: function () {
      this.howslidermove('left')
    },

    handlebtnright: function () {
      this.howslidermove('right')
    },

    //小圆点对应图片
    manslider: function (e) {
      var e = e || window.event;
      var tar = e.target || e.srcelement;
      var tagname = tar.tagname.tolowercase();
      if (tagname === "i") {
        this.idx = array.prototype.indexof.call(this.yuanitems, tar);  //index的位置
        this._slideaction(this.idx);
      }
    },

    //图片切换
    _slideaction: function (idx) {
      this.slideritems.eq(idx).stop().fadein(1000)
        .siblings().stop().fadeout(1000);
      this.yuanitems.eq(idx).addclass('cur')
        .siblings().removeclass('cur');
    },
  });

  window.slider = slider;

})();