// 使用说明：（需要移动的dom，触摸块dom，跟随改变map dom）
function myDomMove(dom, div, map) {
    this.m = $(dom);
    this.div = $(div);
    this.mapId = $(map);
    this.__xx = null; //鼠标实时位置
    this.__yy = null;
    this.__sx = null; //鼠标开始位置
    this.__sy = null;
    this.__dx = null; //dom位置
    this.__dy = null;
    this.mapH = null; //地图高度
    this.__wy = null; //屏幕高度
    this.state = "up"; //dom状态默认up

    this.getMosePosition = (x, y) => { //获取鼠标位置
        this.__sx = x;
        this.__sy = y;
        // console.log(this.__sy, '鼠标开始');

    }
    this.getDomPosition = () => { //获取dom位置
        this.__dx = this.m.offset().left;
        this.__dy = this.m.offset().top;
        this.__wy = document.documentElement.clientHeight;
        // console.log(this.__dy, 'dom');
    }
    this.getMapHeight = () => { //获取地图高度
        var that = this;
        this.mapId.css("height", (index, value) => {
                that.mapH = parseFloat(value);
            })
            // console.log(that.mapH, 'map位置');
    }
    this.changeDomPosition = (x, y, dy) => { //改变dom位置
        var that = this;
        // this.mapId.css("height", (index, value) => {//改变地图高度
        //     var h = this.mapH + y;
        //     console.log(h);
        //     return h ;
        // })
        this.m.animate({ top: dy + "px" }, 10);

    }


    //begin
    this.followFinger = (map, state = 14) => { //(地图实例，dom状态判断是向上还是向下)
        // console.log('开始跟随手指');
        var that = this;
        if (state != 14) {
            that.state = state;
            // console.log(that.state);
        }
        that.getDomPosition(); //获取dom位置
        that.getMapHeight(); //获取地图高度
        var once = true;
        that.div.on('touchmove', function(e) { //获取鼠标位置
            e = e || window.event;
            that.__xx = e.touches[0].clientX;
            that.__yy = e.touches[0].clientY;
            if (once) { //获取第一次点击的位置
                once = false;
                that.getMosePosition(that.__xx, that.__yy);
            }
            // console.log(that.__yy, '鼠标');
            var h = that.__yy - that.__sy //鼠标移动距离y

            if (that.state == 'down') { //两种模式
                // console.log(that.state);
                if (h >= 0 && h + that.__dy <= that.__wy - 20) {
                    that.changeDomPosition(0, h, h + that.__dy); //改变位置
                    // console.log(that.state,h + that.__dy,112);
                }
            } else if (that.state == 'up') {
                if (h >= -that.__dy && h <= that.__wy - 20) {
                    that.changeDomPosition(0, h, h + that.__wy - 20); //改变位置
                    // console.log(that.state,h + that.__wy - 20,112);
                }
            }

        });
        that.div.on('touchend', function() { //抬起重置
            once = true; //抬起重置鼠标点击位置
            var chous = null;
            if (that.state == 'down') { //两种模式
                // var chous = Math.abs(that.__yy - that.__sy) < that.__wy / 4;
                chous = (that.__sy - that.__yy) < 0;
            } else if (that.state == 'up') {
                // var chous = Math.abs(that.__yy - that.__sy) > that.__wy / 4;
                chous = (that.__sy - that.__yy) < 0;
            }
            if (!chous) {
                //改变dom位置
                that.changeDomPosition(0, 0, (parseFloat(that.__wy / 10) * 3.999));
                // that.getDomPosition();//抬起获取dom位置/持续停留使用
                that.state = 'down';
                $('#map').css("height", (index, value) => { //改变地图高度
                    return '50%';
                })
                map.invalidateSize(true); //应用地图高度
            } else {
                // that.changeDomPosition(0, 0, that.__wy - 50); //改变位置
                that.changeDomPosition(0, 0, that.__wy); //改变位置
                // that.getDomPosition();//抬起获取dom位置/持续停留使用
                that.state = 'up';
                $('#map').css("height", (index, value) => { //改变地图高度
                    return '100%';
                })
                map.invalidateSize(true); //应用地图高度
            }
            that.getMapHeight(); //抬起获取map高度
        });
    }
    this.destruction = () => { //初始化销毁
        this.m = $(dom);
        this.div = $(div);
        this.mapId = $(map);
        this.__xx = null; //鼠标实时位置
        this.__yy = null;
        this.__sx = null; //鼠标开始位置
        this.__sy = null;
        this.__dx = null; //dom位置
        this.__dy = null;
        this.mapH = null; //地图高度
        this.__wy = null; //屏幕高度
        this.state = "up"; //dom状态默认up
        this.div.off();
    }
}

// export default myDomMove;