(function (w) {

  /**
   * 
   * @param {*} params 
   * @param {el: 初始化元素}
   * @param {baseTarget: 默认旋转圈数}
   * @param {delayTime: 结束延迟}
   * @param {count: 奖品个数}
   */


  var luckDraw = function (params) {
    if (!params.el) return console.log('element is none');
    // 保存一份属性
    this.params = params

    // 初始化属性
    this.el = params.el;
    this.baseTarget = (params.baseTarget || 6) * 360;
    this.delayTime = params.delayTime || 2;
    this.endTarget = 0;
    this.timer = null;
    this.count = params.count || 8;

    // 计算属性
    this.one = 360 / this.count;
    // 转到中间
    this.deep = this.one / 2;
  }

  luckDraw.prototype = {
    init: function (params) {
      return new luckDraw(params)
    },
    rotate: function (target, func) {
      if (this.timer) return;
      var random = target || parseInt(Math.random() * (this.count + 1)),
        addTarget = parseInt((random - 1) * this.one + this.deep);
      this.endTarget = addTarget + this.baseTarget + (this.endTarget - this.endTarget % 360);
      this.setCss();
      this.showMessage(function () {
        if (func && typeof func == 'function') func();
      })
    },
    setCss: function () {
      var transformArray = ['', '-ms-', '-webkit-', '-moz-', '-o-'];
      var transitionArray = ['', '-ms-', '-moz-', '-webkit-', '-o-'];
      for (var i = 0; i < transitionArray.length; i++) {
        this.el.style[transitionArray[i] + 'transition'] = transitionArray[i] + 'transform ease ' + this.delayTime + 's';
      }
      for (var i = 0; i < transformArray.length; i++) {
        this.el.style[transformArray[i] + 'transform'] = 'rotate(' + this.endTarget + 'deg) ' + (transformArray[i] == '-ms-' ? '' : 'translateZ(0)');
      }
    },
    showMessage: function (func) {
      this.timer = setTimeout(function () {
        typeof func == 'function' && func();
        this.timer = null;
      }.bind(this), this.delayTime * 1000)
    }
  }

  luckDraw.init = luckDraw.prototype.init;
  window.luckDraw = luckDraw


})(window);