'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
    };
    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(_this.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>姝ｅ湪鍔犺浇</div>\n    <div class="page-loading end"><i></i>鍒拌揪鏈€鍚嶞/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;

    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;

    return new Promise(function (resolve, reject) {
        _this3.requesting = true;

        var data = _extends({}, _this3.config, {
            moreCallback: null,
            moreElement: null
        });
        //data.url = "";
        data.moreElement = "";
        data.moreCallback = "";

        $.ajax({
            url: _this3.config.url,
            data: data,
            method: 'POST',
            dataType: 'json'
        }).then(function (data) {
            //console.log(JSON.stringify(data))
            resolve(data);
        }, function (data) {
            reject(data);
        }).done(function () {
            _this3.requesting = false;
        });
    });
};

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

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

    if (this.requesting) {
        return new Promise(function (resolve, reject) {
            setTimeout(function () {
                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(function () {
                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);
        });
    });
};