(function(){
    var swiperobj = null;
    var heightgap = 500; // 高度差距,执行过渡效果的距离 范围屏幕高度以内
    var limit = { // 高度限制
        mobile: 400,
        ipad: 450,
        pc: 720
    };

    function showelement(arr){
        if (arr[0]) { // 第一部分显示时
            
        } else {
            
        }
        if (arr[1]) { 
            $('.gsjj-tit-b, .gsjj-img').addclass('show');
        } else {
            $('.gsjj-tit-b, .gsjj-img').removeclass('show');
        }

        if (arr[2]) { 
            $('.l-qywh5 ,.l-qywh6').addclass('show');
        } else {
            $('.l-qywh5 ,.l-qywh6').removeclass('show');
        }

        if (arr[3]) {
            $('.gywm-top2, .jjgl-tit').addclass('show');
        } else {
            $('.gywm-top2, .jjgl-tit').removeclass('show');
        }
        if (arr[4]) {
            $('.gywm-top3, .tzal-img-b').addclass('show');
        } else {
            $('.gywm-top3, .tzal-img-b').removeclass('show');
        }
        if (arr[5]) {
            $('.l-qywh-box,.fotter').addclass('show');
        } else {
            $('.l-qywh-box,.fotter').removeclass('show');
        }
    }

    var isie = iecheck();

    if (!isie || isie >= 9) {
        var obj = new windetail({
            limit: limit,
            changeuifn: function(state){
                console.log('uichange');
                
                // 分端显示图片
                $('.' + state.uimode).find('img').attr('src', function(){
                    return $(this).attr('data-img');
                })
            },
            changesizefn: function(state){
                console.log('sizechange');
                $('.swiper-container').height(state.winheight);
                $('.swiper-slide').height(state.winheight);
            },
            pcfn: function(state){
                console.log('pcfn');
            }
        });
        var status = obj.state.isreadly;

        if (status){
            swiperobj = new swiper('.swiper-container', {
                mode: 'vertical', // 竖直滚动
                loop: false, // 循环控制
                mousewheelcontrol: true, // 鼠标滚轮触发
                slideactiveclass: 'swiper-active', // 激活类名
                pagination: '.pagination', // 指示点
                paginationclickable: true, // 可点击指示点
                 slidesperview : 'auto', // 根据每屏大小自适应滚动
                createpagination: false, // 自动生成指示点
                onslidechangeend: swipercallback // 回调函数
            })
            $('.mouse').velocity({
                translatey: [ 50, 0 ],
                opacity: [ 0.3, "easeinquint", 1 ]
            }, {
                duration: 1500,         // 动画执行时间
                loop: true           // 循环
            })
        } else {
            noswiper();
        }
    } else {
        //  < ie7,8
        noswiper();
    }


    function noswiper(){
        $('.mouse').hide();
        $('.pagination').hide();
        $('.swiper-slide').height('850px');
        $('.swiper-container').height('auto');
        $(window).scroll(swipercallback);
    }

    function swipercallback() {
        var flagswiper =  arguments[0] instanceof swiper;
        var arr = [];
        var elementarr = $('.swiper-slide');
        var length = elementarr.length;
        for (var i = 0; i < length; i++){
            var flag;
            if (flagswiper){
                flag = $(elementarr[i]).offset().top - heightgap <= 0;
            } else {
                flag = $(elementarr[i]).offset().top + heightgap >= 0;
            }
            arr[i] = flag;
        }
        showelement(arr);
    }


    function iecheck(){
        var ua = window.useragent || window.navigator.useragent;
        if(/msie/i.test(ua)){
            var lv = ua.match(/msie (\d+\.\d+)/i)[1];
            return parseint(lv);
        }
        return false;
    }

    function onswiperto(index){
        if (swiperobj) {
            swiperobj.swipeto(index, 200, true);
        } else {
            var itemtop = $(".swiper-slide" +  ++index).offset().top;
            $("html,body").animate({scrolltop: itemtop + "px"}, 200);
        }
    }
})()