// 滚动到指定位置---begin
function getscrolltop() {
    return (document.scrollingelement && document.scrollingelement.scrolltop) ||
        document.documentelement.scrolltop ||
        document.body.scrolltop;
}

function setscrolltop(st) {
    if (!st) st = 0;
    document.documentelement.scrolltop = document.body.scrolltop = st;
}

function scrolltop(scrolltop, time) {
    scrolltop = scrolltop ? scrolltop : 0;
    time = time ? time : 500;
    const cubic = function (value) {
        return math.pow(value, 3)
    };
    const easeinoutcubic = function (value) {
        return value < 0.5 ? cubic(value * 2) / 2 : 1 - cubic((1 - value) * 2) / 2
    }
    const begintime = date.now();
    const beginvalue = getscrolltop();
    const raf = window.requestanimationframe || (function (func) {
        return settimeout(func, 16)
    });
    const framefunc = function () {
        if (isnan(+time) || +time === 0) {
            setscrolltop(scrolltop);
            return;
        }
        const progress = (date.now() - begintime) / time;
        if (progress < 1) {
            setscrolltop(
                scrolltop + (beginvalue - scrolltop) * (1 - easeinoutcubic(progress))
            );
            raf(framefunc);
        } else {
            setscrolltop(scrolltop);
        }
    };
    raf(framefunc);
};

/** 获取指定元素距离页面顶部距离 */
function getelementtopagetop(el) {
	if(el.parentelement) {
	  return getelementtopagetop(el.parentelement) + el.offsettop
	}
	return el.offsettop
}
/** 获取指定元素高度 */
function getelementheight(el) {
    return el.clientheight;
}

function playfirstvideo() {
    var videocontain = $($('.index-top-banner .swiper-slide')[0]);
    var curvideo = videocontain.find('video');
    if (curvideo.length) {
        curvideo.trigger('play');
    }
}

// 滚动到指定位置---end

// 首页，滚动到到“我们能做什么时动画”
$(function(){
    var ua = navigator.useragent;
    var ipad = ua.match(/(ipad).*os\s([\d_]+)/),
    isiphone =!ipad && ua.match(/(iphone\sos)\s([\d_]+)/),
    isandroid = ua.match(/(android)\s+([\d.]+)/),
    ismobile = isiphone || isandroid;
    if(ismobile){
        window.location.replace('/cn/m/');
    }
    
    try {
        var navheight = getelementheight(document.getelementsbyclassname('top-nav')[0]);
        var top = getelementtopagetop(document.getelementbyid('weare'));
        $('.arrow-down').click(function() {
            scrolltop(top - navheight, 500);
        });
    } catch (error) {
        console.log(error)
    }
    
    //try {
    //    var myindextopswiper = new swiper('.index-top-banner.swiper-container', {
    //        autoplay: 5000,
    //        autoplaydisableoninteraction : false,
    //        pagination: '.index-top-banner .swiper-pagination',
    //        nextbutton: '.index-top-banner .swiper-button-next',
    //        prevbutton: '.index-top-banner .swiper-button-prev',
    //        resize: function() {
    //            //窗口变化了
    //            myindextopswiper.updatesize();
    //        },
    //        oninit: function(swiper){
    //            //playfirstvideo();
    //        },
    //        onslidechangeend: function (swiper){
    //            var videocontain = $($('.index-top-banner .swiper-slide')[this.activeindex]);
    //            var curvideo = videocontain.find('video');
    //            if (curvideo.length) {
    //                curvideo.trigger('play');
    //            }
    //            //var othervideo = videocontain.siblings().find('video');
    //            //for (var i = 0; i < othervideo.length; i++) {
    //            //    if (!!window.activexobject || "activexobject" in window) {
    //            //        return false;
    //            //    } else {
    //            //        othervideo[i].currenttime = 0;
    //            //        othervideo.trigger('pause');
    //            //    }
    //            //}
    //        }
    //    });
    //} catch (error) {
    //    console.log(error)
    //}

   
       
   
    
    //try {
    //    function controlvideo() {
    //        var videocontain = $($('.index-top-banner .swiper-slide')[0]);
    //        var videos = videocontain.find('video');
    //        if (videos.length > 0) {
    //            myindextopswiper.stopautoplay();
    //            videos[0].onended = function(){
    //                myindextopswiper.startautoplay();
    //                settimeout(() => {
    //                    myindextopswiper.slidenext()
    //                }, 300);
    //            }
    //        } else {
    //            myindextopswiper.startautoplay();
    //        }
    //    }
    //    controlvideo();
    //} catch (error) {
    //    console.log(error)
    //}
});