"use strict";

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

function Page(config) {
  this.defaultConfig = {
    url: "",
    limit: 10,
    page: 1,
    moreElement: undefined,
    moreCallback: undefined,
    iscroll: function iscroll() {}
  };
  this.cacheConfig = _extends({}, config || {});
  this.total = 0;
  this.list = [];
  this.config = _extends({}, this.defaultConfig, config || {});

  return this;
}
Page.prototype.init = function () {
  var _this = this;

  this.bindScroll();
  return new Promise(function (resolve, reject) {
    _this.get().then(function (data) {
      _this.total = data.total;
      _this.list = _this.list.concat(data.list);
      _this.size = Math.ceil(_this.total / _this.config.limit);
      resolve(_this.getReturn(data.list));

      _this.bindScrollEvent();
    }, function (data) {
      reject(data);
    });
  });
};

Page.prototype.bindScrollEvent = function () {
  clearInterval(this.checkTimer);
  this.checkTimer = setInterval(this.checkNext.bind(this), 300);
};

Page.prototype.bindScroll = function () {
  this.moreElement = $(this.config.moreElement);
  this.moreElement.html("").append("\n    <div class=\"page-loading ing\"><i></i>正在加载</div>\n    <div class=\"page-loading end\"><i></i>到达最后</div>\n  ");

  this.moreElement.find(".ing").addClass("show");
  this.moreElement.find(".end").removeClass("show");
};

Page.prototype.checkNext = function () {
  var _this2 = this;

  var offset = $(window).scrollTop() + $(window).height() - this.moreElement.offset().top;
  var iscroll = this.config.iscroll();
  if (iscroll) {
    if (Math.abs(iscroll.maxScrollY) - Math.abs(iscroll.y) < 50) {
      offset = 51;
    } else {
      offset = 0;
    }
  }

  if (offset > 50) {
    this.next().then(function (data) {
      if (typeof _this2.config.moreCallback === "function") {
        _this2.config.moreCallback(data);
      }
    });
  }
};

Page.prototype.getReturn = function (list) {
  return {
    list: list,
    full: this.list,
    total: this.total,
    size: this.size,
    page: this.config.page,
    limit: this.config.limit
  };
};

Page.prototype.get = function () {
  var _this3 = this;

  var iscroll = this.config.iscroll();
  var passOutChange = false;

  if (this.timer) {
    clearTimeout(this.timer);
    this.timer = undefined;
    passOutChange = true;
  }
  if (iscroll && iscroll.options.passOut === true) {
    iscroll.options.passOut = false;
  }
  return new Promise(function (resolve, reject) {
    _this3.requesting = true;
    $.ajax({
      url: _this3.config.url,
      data: _extends({}, _this3.config, {
        moreCallback: null,
        moreElement: null
      }),
      method: "GET",
      dataType: "json"
    }).then(function (data) {
      resolve(data);
    }, function (data) {
      reject(data);
    }).done(function () {
      _this3.requesting = false;
      _this3.timer = setTimeout(function () {
        passOutChange && (iscroll.options.passOut = true);
      }, 4000);
    });
  });
};

Page.prototype.reset = function (config) {
  this.config = _extends({}, this.config, this.defaultConfig, this.cacheConfig, config || {});
  return this.init();
};

Page.prototype.next = function () {
  var _this4 = this;

  if (this.requesting) {
    return new Promise(function (resolve, reject) {
      // setTimeout(() => {
      //   reject();
      // }, 0);
    });
  }
  if (this.config.page >= this.size) {
    return new Promise(function (resolve, reject) {
      _this4.moreElement.find(".ing").removeClass("show");
      _this4.moreElement.find(".end").addClass("show");
      clearInterval(_this4.checkTimer);

      // setTimeout(() => {
      //   reject();
      // }, 0);
    });
  }

  this.config.page++;

  return new Promise(function (resolve, reject) {
    _this4.get().then(function (data) {
      _this4.list = _this4.list.concat(data.list);
      resolve(_this4.getReturn(data.list));
    }, function (data) {
      reject(data);
    });
  });
};