function _instanceof(left, right) {
  if (
      right != null &&
      typeof Symbol !== "undefined" &&
      right[Symbol.hasInstance]
  ) {
    return right[Symbol.hasInstance](left);
  } else {
    return left instanceof right;
  }
}

function _classCallCheck(instance, Constructor) {
  if (!_instanceof(instance, Constructor)) {
    throw new TypeError("Cannot call a class as a function");
  }
}

function _defineProperties(target, props) {
  for (var i = 0; i < props.length; i++) {
    var descriptor = props[i];
    descriptor.enumerable = descriptor.enumerable || false;
    descriptor.configurable = true;
    if ("value" in descriptor) descriptor.writable = true;
    Object.defineProperty(target, descriptor.key, descriptor);
  }
}

function _createClass(Constructor, protoProps, staticProps) {
  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
  if (staticProps) _defineProperties(Constructor, staticProps);
  return Constructor;
}

var Page =
    /*#__PURE__*/
    (function() {
      "use strict";

      function Page() {
        var _ref =
                arguments.length > 0 && arguments[0] !== undefined
                    ? arguments[0]
                    : {},
            _ref$el = _ref.el,
            el = _ref$el === void 0 ? ".pagination-box" : _ref$el,
            _ref$now = _ref.now,
            now = _ref$now === void 0 ? 1 : _ref$now,
            _ref$show = _ref.show,
            show = _ref$show === void 0 ? 5 : _ref$show,
            _ref$total = _ref.total,
            total = _ref$total === void 0 ? 1000 : _ref$total,
            _ref$size = _ref.size,
            size = _ref$size === void 0 ? 10 : _ref$size,
            _ref$click = _ref.click,
            click = _ref$click === void 0 ? null : _ref$click;

        _classCallCheck(this, Page);

        this.now = now;
        this.show = show;
        this.total = total;
        this.size = size;
        this.min = 1;
        this.max = Math.ceil(total / size);
        this.contentArr = [];
        this.contentDom = [];
        this.dom = document.querySelector(el);
        this.abDom = [];
        this.otherDom = [];
        this.click = click;
      }

      _createClass(Page, [
        {
          key: "init",
          value: function init() {
            var _this = this;

            // dom数组
            var cArr = ["back", "prev", "next", "cont", "min", "max"];
            cArr.forEach(function(v) {
              _this.otherDom.push(
                  _this.dom.querySelector('button[name="'.concat(v, '"]'))
              );
            });
            this.otherDom[4].innerText = this.min;
            this.otherDom[5].innerText = this.max;

            if (this.min === this.max) {
              this.otherDom[5].style.display = "none";
            } // 创建dom

            this.getContent(); // 点击事件
            $(this.dom).off("click").on("click", function(e) {
              if (e.target.nodeName === "BUTTON") {
                var type = e.target.getAttribute("name");
                var tempNumber = 0;

                switch (type) {
                  case "back": {
                    tempNumber = -1;
                    break;
                  }

                  case "cont": {
                    tempNumber = 1;
                    break;
                  }

                  case "prev": {
                    tempNumber = -_this.show;
                    break;
                  }

                  case "next": {
                    tempNumber = _this.show;
                    break;
                  }

                  default: {
                    tempNumber = parseInt(e.target.innerText) - _this.now;
                  }
                }

                var tempNow = _this.now + tempNumber;

                if (_this.min <= tempNow && tempNow <= _this.max) {
                  _this.now = tempNow;
                }

                typeof _this.click === "function"
                    ? _this.click(_this.now, type)
                    : null;

                _this.getContent();

                _this.upData();
              }
            });
            var nextButton = this.otherDom[2];
            this.abDom = this.otherDom.slice(-2);
            this.contentArr.forEach(function(v) {
              var b = document.createElement("button");
              b.innerText = v;

              _this.contentDom.push(b);

              _this.dom.insertBefore(b, nextButton);
            });
            this.upData();
          }
        },
        {
          key: "upData",
          value: function upData() {
            var _this2 = this;

            this.abDom.forEach(function(v) {
              return (v.className = "");
            });
            this.otherDom[0].className = "";
            this.otherDom[3].className = "";

            if (this.now <= this.min) {
              this.now = this.min;
              this.abDom[0].className = "now";
              this.otherDom[0].className = "stop";
            }

            if (this.now >= this.max) {
              this.now = this.max;
              this.abDom[1].className = "now";
              this.otherDom[3].className = "stop";
            }

            this.contentDom.forEach(function(v, i) {
              v.className = "";
              var n = _this2.contentArr[i];

              if (n === _this2.now) {
                v.className = "now";
              }

              v.innerText = n;
            });
          }
        },
        {
          key: "getContent",
          value: function getContent() {
            var _this3 = this;

            var n = this.now;
            var size = this.show;
            var arr = [];

            for (var i = 0; i < size; i++) {
              arr[i] = i;
            } // default

            var content = Math.floor(arr.length / 2);
            var show = [true, true];

            var mapF = function mapF(v, i) {
              var step = content - i;
              return n - step;
            }; // min


            if (this.max - size < n) {
              mapF = function mapF(v, i) {
                return _this3.max - size + i;
              };

              show[1] = false;
            }

            if(n+(size-1)/2<this.max-1){
              show[1] = true;
            }

            if (n <= size - this.min) {
              mapF = function mapF(v, i) {
                return _this3.min + 1 + i;
              };
              show[0] = false;
            } // max


            if (this.max - this.min <= this.show) {
              show = [false, false];
            }
            this.contentArr = arr.map(mapF).filter(function(v) {
              return v > _this3.min && v < _this3.max;
            });

            if(this.min+1==this.contentArr[0]){
              show[0] = false;
            }

            if(this.max-1==this.contentArr[this.contentArr.length-1]){
              show[1] = false;
            }
            show.forEach(function(v, i) {
              _this3.otherDom[i + 1].style.display = v ? "inline-block" : "none";
              _this3.otherDom[i + 1].style.pointerEvents = "none";
            });
          }
        }
      ]);
      return Page;
    })();