(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
    typeof define === 'function' && define.amd ? define(factory) :
    (global.Mdropload = factory());
}(this, (function () { 'use strict';

var utils = {
    //prefix: (function () {
    //    var styles = window.getComputedStyle(document.documentElement, ''),
    //        pre = (Array.prototype.slice
    //                .call(styles)
    //                .join('')
    //                .match(/-(moz|webkit|ms)-/) || (styles.OLink === '' && ['', 'o'])
    //        )[1],
    //        dom = ('WebKit|Moz|MS|O').match(new RegExp('(' + pre + ')', 'i'))[1];
    //    return {
    //        dom: dom,
    //        lowercase: pre,
    //        css: '-' + pre + '-',
    //        js: pre[0].toUpperCase() + pre.substr(1)
    //    };
    //})(),
    /**
     *
     * @param obj
     * @param key
     * @param value
     * @param closePrefix 是否关闭前缀
     */
    css: function css(obj, key, value, closePrefix) {
        // fixbug vivo and xiaomi
        obj.style[key] = value;
        if (!closePrefix) {
            obj.style['-webkit-' + key] = value;
        }
    },
    elementCSS: function elementCSS(key, value) {
        if (arguments.length === 2) {
            utils.css(this, key, value);
        } else {
            return this.style[key];
        }
    },
    mouseXY: function mouseXY(_e) {
        // 用于扩展JQ的触摸事件
        try {
            var $x, $y;
            if (_e.originalEvent && _e.originalEvent.changedTouches) {
                $x = _e.originalEvent.changedTouches[0].pageX;
                $y = _e.originalEvent.changedTouches[0].pageY;
            } else if (_e.changedTouches) {
                $x = _e.changedTouches[0].pageX;
                $y = _e.changedTouches[0].pageY;
            } else {
                $x = _e.pageX;
                $y = _e.pageY;
            }
            return { x: $x, y: $y };
        } catch (err) {
            console.log(err);
        }
        return { x: 0, y: 0 };
    },
    //DOM没有提供insertAfter()方法
    insertAfter: function insertAfter(nowNode, newNode) {
        var parent = nowNode.parentNode;
        if (parent.lastChild == nowNode) {
            parent.appendChild(newNode);
        } else {
            parent.insertBefore(newNode, nowNode.nextSibling);
        }
    }
};

var css$1 = {
    init: function init() {
        // 初始化CSS样式
        var createCss = document.createElement('style');
        createCss.innerHTML = '\n        .js-mdropload{\n            z-index:1;\n            -webkit-transform: translateZ(0);   \n            transform: translateZ(0);\n            -webkit-backface-visibility: hidden;\n            backface-visibility: hidden;\n            -webkit-perspective: 1000;\n            perspective: 1000;\n        }\n        .js-mdropload-up {\n            position: absolute;\n        }\n        .js-mdropload-down{\n            transition-duration:.5s;\n            -webkit-transition-duration:.5s;\n        }\n        .js-mdropload-up{\n            opacity:0;\n            min-height:30px;\n        }\n        .js-mdropload-down{\n            height:60px;\n            line-height:60px;\n        }\n        .js-mdropload-up,.js-mdropload-down{\n            text-align: center;\n            line-height:30px;\n            width: 100%;\n        }\n        .js-mdropload-message {\n            opacity:0;\n        }\n        ';
        document.body.appendChild(createCss);
    }
};

var callback = function callback() {
    var that = this;
    var fn = {
        success: function success() {
            console.log(that.status.lock, that.status.loading);
            if (!that.status.lock && that.status.loading) {
                fn.reset();
                if (that.opt.up.template.success) {
                    that.upObj.innerHTML = that.opt.up.template.success;
                }
                if (that.opt.down.template.success) {
                    console.log('修改文字');
                    that.downObj.innerHTML = that.opt.down.template.success;
                }
            }
        },
        reset: function reset(mouseY) {
            console.log(mouseY);
            that.obj.css('transform', 'translate3d(0,0,0)');
            that.upObj.css('opacity', '0');
            that.status.bottomEvent = false;
            that.status.loading = false;
            if (mouseY > 0) {
                that.downObj.css('opacity', '0');
            }
        },

        // 提供给底部加载下一页使用
        end: function end() {
            that.downObj.innerHTML = that.opt.down.template.end;
            fn.reset();
        }
    };
    return fn;
};

var $hasTouch = "ontouchstart" in window;
var eventStart = $hasTouch ? "touchstart" : "mousedown";
var eventEnd = $hasTouch ? "touchend" : "mouseup";
var eventMove = $hasTouch ? "touchmove" : "mousemove";
var eventResize = $hasTouch ? "orientationchange" : "resize";
var eventcancel = $hasTouch ? "touchcancel" : "mouseup";

var touchEvent = {
    eventStart: eventStart, eventEnd: eventEnd, eventMove: eventMove, eventResize: eventResize, eventcancel: eventcancel
};

var _d = document;

var scroll = {
    // 获取滚动条高度
    getScrollTop: function getScrollTop() {
        var bodyScrollTop = 0;
        var documentScrollTop = 0;
        if (_d.body) {
            bodyScrollTop = _d.body.scrollTop;
        }
        if (_d.documentElement) {
            documentScrollTop = _d.documentElement.scrollTop;
        }
        return bodyScrollTop - documentScrollTop > 0 ? bodyScrollTop : documentScrollTop;
    },

    // 文档的总高度
    getScrollHeight: function getScrollHeight() {
        var bodyScrollHeight = 0;
        var documentScrollHeight = 0;
        if (document.body) {
            bodyScrollHeight = document.body.scrollHeight;
        }
        if (document.documentElement) {
            documentScrollHeight = document.documentElement.scrollHeight;
        }
        return bodyScrollHeight - documentScrollHeight > 0 ? bodyScrollHeight : documentScrollHeight;
    },

    // 浏览器视口的高度
    getWindowHeight: function getWindowHeight() {
        var windowHeight = 0;
        if (document.compatMode === 'CSS1Compat') {
            windowHeight = document.documentElement.clientHeight;
        } else {
            windowHeight = document.body.clientHeight;
        }
        return windowHeight;
    }
};

var str = {
    a: 'addEventListener',
    r: 'removeEventListener',
    jmd: 'js-mdropload',
    jmdUp: 'js-mdropload-up',
    jmdDown: 'js-mdropload-down',
    tf: 'transform',
    t3d: 'translate3d',
    td: 'transition-duration',
    te: 'transitionend',
    scroll: 'scroll',
    o: 'opacity'
};

var touchStart = function (e) {
    if (this.status.lock) return;
    // 判断是否在可视范围之内
    var top = this.obj.getBoundingClientRect().top;
    if (top < 0 || top > window.innerHeight) {
        return;
    }
    // e.preventDefault();
    // 取当前tf高度
    this.offsetY = this.obj.css(str.tf).split(',')[1].replace('px', '').trim() * 1;
    if (isNaN(this.offsetY)) {
        this.offsetY = 0;
    }
    this.status.lock = true;
    this.obj.css(str.td, '0s');
    this.upObj.css(str.td, '0s');
    this.downObj.css(str.o, '1');
    this.startMouse = utils.mouseXY(e);
    // 再次初始化字符
    this.upObj.innerHTML = this.opt.up.template.none;
    // this.downObj.innerHTML = this.opt.down.template.none;
}

var scrollTimeout = null;
var scrollEvent = function (e) {
    // 已经在执行了，无需再次执行
    var that = this;
    if (that.status.loading || that.status.bottomEvent) return;
    clearTimeout(scrollTimeout);
    scrollTimeout = setTimeout(function () {
        if (scroll.getScrollTop() + scroll.getWindowHeight() >= scroll.getScrollHeight() - 50) {
            // bottom event
            console.log('执行down');
            that.status.loading = true;
            that.status.bottomEvent = true;
            //setTimeout(function () {
            //    that.status.bottomEvent = false;
            //}, 500);
            that.downObj.css(str.o, '1', false);
            that.downObj.innerHTML = that.opt.down.template.loading;
            that.opt.down && that.opt.down.fn(callback.call(that));
        } else {
            console.log('不执行down');
        }
    }, 100);
}

var touchend = function (e) {
    if (this.status.lock) {
        this.endMouse = utils.mouseXY(e);
        var mouseY = this.endMouse.y - this.startMouse.y;
        if (mouseY > 20) {
            e && e.preventDefault && e.preventDefault();
        }
        this.obj.css(str.td, '.5s');
        if (mouseY < this.opt.height) {
            this.obj.css(str.tf, str.t3d + '(0,0px,0)');
        } else {
            this.obj.css(str.tf, str.t3d + '(0,' + this.opt.height + 'px,0)');
        }
        this.upObj.css(str.tf, str.t3d + '(0,0,0)');
        this.upObj.css(str.td, this.opt.animationTime + 's');
        // 操作完成之后的回调方法
        this.status.lock = false;
        var _cb = callback.call(this);
        // 查询是否可以释放更新
        if (mouseY > this.opt.height) {
            this.upObj.innerHTML = this.opt.up.template.loading;
            this.status.loading = true;
            this.opt.up && this.opt.up.fn(_cb);
        } else {
            _cb.reset(mouseY);
        }
        //if (mouseY <= 0) {
        //    this.downObj.innerHTML = this.opt.down.template.loading;
        //}
    }
    // this.upObj.innerHTML = this.opt.up.template.none;
}

var touchMove = function (e) {
    var that = this;
    var screenHeight = window.innerHeight;
    if (that.status.lock) {
        var mouse = utils.mouseXY(e);
        var mouseY = mouse.y - that.startMouse.y;
        // 解决与iScroll冲突问题
        if (scroll.getScrollTop() === 0 && mouseY > 0) {
            e.preventDefault && e.preventDefault();
            // 判断是否固定距离,默认为一半屏幕高度
            if (mouseY > 0 && mouseY < that.opt.windowHeight) {
                var offset = (mouseY + that.offsetY) / 2;
                var o = (offset / that.opt.height).toFixed(2);
                o = o > 1 ? 1 : o;
                that.obj.css(str.tf, str.t3d + '(0,' + offset + 'px,0)');
                that.upObj.css(str.o, o);
                // 操作下拉提示框
                var offsetUpobjHeight = (offset - that.opt.height) / 2;
                that.upObj.css(str.tf, str.t3d + '(0,' + (offsetUpobjHeight < 0 ? 0 : offsetUpobjHeight) + 'px,0)');
            }
            if (mouseY > that.opt.height) {
                that.upObj.innerHTML = that.opt.up.template.message;
            }
        }
        // 尝试阻止移动丢失
        if (mouse.y > screenHeight - 100) {
            touchend.apply(that, e);
        }
    }
}

var touchCacnecl = function (e) {
    // fixbug touchend可能异常不触发
    callback.call(this).reset();
}

var $that = window;
var $d = void 0;
var $b = void 0;
var $touch;

$touch = function $touch(element, _opt) {
    var $obj = null;
    var that = this;
    $d = $that.document;
    $b = $d.body;
    if (element == undefined) {
        $obj = $b;
    } else {
        $obj = element;
    }
    that.opt = _opt;
    // 动画时长
    that.opt.animationTime = that.opt.animationTime || .5;
    // 最大可拉取步长
    that.opt.windowHeight = window.innerHeight;
    that.obj = $obj;
    that.obj.css = function (key, value) {
        if (arguments.length === 2) {
            utils.css(this, key, value);
        } else {
            return this.style[key];
        }
    };
    // 判断是否需要对未注册方法进行屏蔽
    if (!that.opt.up) {
        that.opt.up = {
            isNull: true, template: {}, fn: function fn() {}
        };
    }
    if (!that.opt.down) {
        that.opt.down = {
            isNull: true, template: {}, fn: function fn() {}
        };
    }
    // 事件缓存,以便销毁
    // bind(that)?
    function touchstart(e) {
        touchStart.call(that, e);
    }

    function touchend$$1(e) {
        touchend.call(that, e);
    }

    function touchmove(e) {
        touchMove.call(that, e);
    }

    function touchcancel(e) {
        touchCacnecl.call(that, e);
    }

    function transitionedn(e) {}

    function eventscroll(e) {
        scrollEvent.call(that, e);
    }

    $obj[str.a](touchEvent.eventStart, touchstart);
    $obj[str.a](touchEvent.eventEnd, touchend$$1);
    $obj[str.a](touchEvent.eventMove, touchmove);
    $obj[str.a](touchEvent.eventcancel, touchcancel);
    window[str.a](touchEvent.eventEnd, touchcancel);
    $obj[str.a](str.te, transitionedn);
    window.onscroll = eventscroll.bind(that);
    // 销毁
    that.destroy = function () {
        callback.call(that).reset();
        $obj[str.r](touchEvent.eventStart, touchstart);
        $obj[str.r](touchEvent.eventEnd, touchend$$1);
        $obj[str.r](touchEvent.eventMove, touchmove);
        $obj[str.r](touchEvent.eventcancel, touchcancel);
        $obj[str.r](str.te, transitionedn);
        $obj.classList.remove(str.jmd);
        window.onscroll = null;
        // window[str.r](str.scroll, eventscroll);
        window[str.r](touchEvent.eventcancel, touchcancel);
        // 节点回收
        try {
            that.upObj && that.obj.parentNode.removeChild(that.upObj);
            that.downObj && that.obj.parentNode.removeChild(that.downObj);
        } catch (err) {
            console.warn(err);
        }

        // 等待回收
        // that = null;
    };
    // 初始化CSS
    utils.css($obj, str.tf, str.t3d + '(0,0,0)');
    utils.css($obj, 'position', 'relative', true);
    utils.css($obj, 'z-index', '20', true);
    utils.css($obj, str.td, that.opt.animationTime);
    that.initTemplate();
    that.status = {
        lock: false,
        loading: false
    };
    return that;
};

$touch.prototype.cancel = function () {
    callback.call(this).reset();
};

$touch.prototype.initTemplate = function () {
    // 初始化上部分
    var $div;
    var that = this;
    if (!that.opt.up.isNull && !document.querySelector('.' + str.jmdUp)) {
        $div = document.createElement('div');
        $div.innerHTML = that.opt.up.template.none;
        $div.className = str.jmdUp;
        this.obj.parentNode.insertBefore($div, this.obj);
    }
    // 初始化下部分
    if (!this.opt.down.isNull && !this.obj.parentNode.querySelector('.' + str.jmdDown)) {
        $div = document.createElement('div');
        $div.innerHTML = this.opt.down.template.none;
        $div.className = str.jmdDown;
        utils.insertAfter(this.obj, $div);
    }
    that.upObj = this.obj.parentNode.querySelector('.' + str.jmdUp);
    that.downObj = this.obj.parentNode.querySelector('.' + str.jmdDown);
    //TODO: 此处需要优化
    if (that.upObj) {
        that.upObj.css = utils.elementCSS.bind(that.upObj);
    } else {
        that.upObj = {};
        that.upObj.css = function () {};
    }

    if (that.downObj) {
        that.downObj.css = utils.elementCSS.bind(that.downObj);
    } else {
        that.downObj = {};
        that.downObj.css = function () {};
    }
};

var core = (function (_el, _opt) {
    // 参数初始化
    css$1.init();
    // 如果_el传递进来是非ELEMENT 则进行转换
    if (!(_el instanceof Element)) {
        _el = document.querySelector(_el);
    }
    if (_el === null) {
        throw '1001:无法寻找到可设置的html节点,请确认后再次调用.';
    }
    _el.classList.add(str.jmd);
    var $fn = new $touch(_el, _opt);
    //$fn.prototype = $touch.prototype;
    return $fn;
});

var index_vue = {
    install: function install(vue, options) {
        vue.prototype.Mdropload = core;
        vue.Mdropload = core;
    }
};

return index_vue;

})));