// ######### media show assistant
function ShowFile() {
    // picture
    var pictures = document.querySelectorAll('#pictureShowArea img');
    if (pictures.length!=0) {
	// only for old browsers
	if (!('objectFit' in document.createElement('img').style)) FallbackObjectFit(pictures);
	// make right column sticky
	var elem = document.getElementById("rightBanner");
	if (elem!=null) elem.className+=" stickyAdvt";
    }
    // video
    var videos = document.querySelectorAll('#videoShowArea video');
    if (videos.length!=0) {
	for (var i=0;i<videos.length;i++) {
	    videos[i].parentNode.id = "playerArea"+((i+1).toString());
	    SetupVideoPlayer(videos[i]);
	}
    }
    // sponsor
    UpdateSponsorButton(((pictures.length!=0)?0:1));
}

// @@ private functions
function UpdateSponsorButton(type) {
    var button = document.getElementById("sponsorButton");
    if (button==null) return;
    var text = button.getAttribute((type!=0?'videoText':'pictureText'));
    if (text!=null) {
	var spans = button.getElementsByTagName("span");
	if (spans.length!=0) spans[0].innerHTML = text;
	else button.innerHTML = text;
    }
}

function FallbackObjectFit(images) {
    for (var i=0;i<images.length;i++) {images[i].style.height='auto';images[i].style.maxHeight='none';}
}

// @@ aux functions
function GetBrowserVersion(prefix) {
    var rexp = new RegExp(prefix+'\/([0-9]+)', 'i');
    var result = navigator.userAgent.match(rexp);
    if (result==null || result.length<2) return 0;
    return result[1];
}

function LoadScript(url, callback, insertPlaceId) {
    // set script param
    var script = document.createElement('script');
    script.src = url;
    if (callback!=null) script.onload = callback;
    // insert script
    var insertPlace = (insertPlaceId!=null ? document.getElementById(insertPlaceId) : null);
    if (insertPlace!=null) insertPlace.parentNode.insertBefore(script, insertPlace.nextSibling);
    else document.body.appendChild(script);
}

// @@ video functions
function NativeVideoSetup(video, options) {
    // set main param
    if (options.autoplay) video.setAttribute('autoplay', '');
    if ("poster" in options) video.setAttribute('poster', options.poster);
    // add event
    video.addEventListener('contextmenu', function(evt) {evt.preventDefault()}, false);
    if (options.upgradeclick) video.addEventListener('click', function(evt) {!!evt && (evt.target.paused ? evt.target.play() : evt.target.pause())}, false);
    if (options.shortrepeat) video.addEventListener('loadedmetadata', function() {if (video.duration!=NaN && 0<video.duration && video.duration<=95) video.setAttribute('loop', '');}, false);
}

function ObsoleteBrowser(container) {
    var messageStr = '<p style="color: #ffffff; font-size: 190%; margin-top: 5em;">Flash is obsolete. Update your browser</p>';
    if (container!=null) container.innerHTML=messageStr;
}

function IsSupportVideo() {
    var video = document.createElement('video');
    var supportVideo = !!(video.canPlayType && video.canPlayType('video/mp4'));
    return supportVideo;
}

function IsUpgradeNativeAction() {
    var ua = navigator.userAgent;
    // click by video
    if (/windows nt|macintosh|x11.*linux/i.test(ua)) {
        if (/chrome\//i.test(ua) && !/edge\//i.test(ua) && GetBrowserVersion('chrome')<72) return 1;
        if (/edge\//i.test(ua) || (/trident\//i.test(ua) && !/msie/i.test(ua))) return 1;
    }
    return 0;
}

function SelectAutoPlayMode(autoPlaySetting) {
    // forbidden
    if (autoPlaySetting==0 || (window.location.search).indexOf('nas')!=-1) return 0;
    if (/android|iphone|ipod|ipad|bb\d+|kaios|bada\/|blackberry|iemobile|symbian|opera mini|phone|tv/i.test(navigator.userAgent)) return 0;
    if (/macintosh/i.test(navigator.userAgent) && !/chrome/i.test(navigator.userAgent) && 11<=GetBrowserVersion('version')) return 0;
    // allow but not real start
    if (/firefox/i.test(navigator.userAgent) && 67<=GetBrowserVersion('firefox')) return 1;
    if (/chrome/i.test(navigator.userAgent) && 66<=GetBrowserVersion('chrome')) {
	// autoplay allow only after user interaction
	if (document.referrer.indexOf(window.location.hostname)==-1) return 1;
	if (window.performance && ('navigation' in window.performance) && performance.navigation.type == performance.navigation.TYPE_RELOAD) return 1;
    }
    // allow and start
    return 2;
}

function SetupVideoPlayer(videoElem) {
    if (videoElem==null) return;
    // check support
    if (!IsSupportVideo()) { ObsoleteBrowser(videoElem.parentNode); return; }
    // fill show param
    var shortRepeat = (typeof repeatShortVideo!=="undefined"?repeatShortVideo:1);
    var autoPlay = SelectAutoPlayMode(typeof autoPlayVideo!=="undefined"?autoPlayVideo:1);
    // fill options
    var options = {
	autoplay: autoPlay,
	shortrepeat: shortRepeat
    };
    if (autoPlay==2) options.poster='';
    options.upgradeclick = IsUpgradeNativeAction();
    // setup
    var useVast = (typeof vastSettings22!=="undefined" && document.cookie.indexOf(vastSettings22.cookie+'Showed')==-1);
    if (useVast) {
        var containerId = videoElem.parentNode.id;
        var onLoadHandler = function() { NativeVideoSetup(videoElem, options); try{jsVast(vastSettings22, containerId);}catch(ex){}; }
        LoadScript('/aux/vast.js', onLoadHandler, 'vastMix');
    }
    else NativeVideoSetup(videoElem, options);
}