var full_base_path = 'http://www.sonypictures.com/RotatingAds/';

// for testing on testdev etc.  
// var full_base_path = '/RotatingAds/';

/*
Array.prototype.clone2 = function () {
    var a = new Array(); 
    for (var property in this) {
        a[property] = typeof (this[property]) == 'object' ? this[property].clone2() : this[property];
    } 
    return a
}
*/

function RotatingAds(){

    var xmlDoc = null;
    var x = null;
    var xml_array = new Array();
    var session_ads_index_array = new Array();
    var session_available_ads = new Array();
    var available_ads = new Array();
    var next_ad_count = 0;
    var ads_name = '';
    var ads_count = 0;
    var duplicates_eminent = false;
    var ads_per_page = 0;
    var img_path = '';
    var manipclass = '';
    
    function importXML(file, path, adsperpage, div_class)
    {
        img_path = full_base_path + path;
        ads_per_page = adsperpage;
        manipclass = div_class;

        if(navigator.appVersion.indexOf ( "Safari" ) != -1){
            var ajaxRequest;  // The variable that makes Ajax possible!
            var str;

            // Opera 8.0+, Firefox, Safari
            ajaxRequest = new XMLHttpRequest();

            // Create a function that will receive data sent from the server
            ajaxRequest.onreadystatechange = function(){
                if(ajaxRequest.readyState == 4){
                    xmlDoc = ajaxRequest.responseXML;
                    setXMLAttributes();
                    populateAdDivs(div_class);
                    close();
                }
            }

            ajaxRequest.open("GET", file, true);
            ajaxRequest.send(null);
        }else{

            if (document.implementation && document.implementation.createDocument)
            {
                xmlDoc = document.implementation.createDocument("", "", null);
                xmlDoc.onload = function(){
                    setXMLAttributes();
                    populateAdDivs(div_class);
                    close();
                }
            }
            else if (window.ActiveXObject)
            {
                xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
                xmlDoc.onreadystatechange = function () {
                    if (xmlDoc.readyState == 4) {
                        setXMLAttributes();
                        populateAdDivs(div_class);
                        close();
                    }
                };
            }
            else
            {
                alert('Your browser can\'t handle this script');
                return;
            }
            try
            {
                xmlDoc.load(file);
            }
            catch (e)
            {
                alert('broken');
            }


        }
    }

    this.importXML = importXML;

    function populateAdDivs(div_class){
        var ad_divs = document.getElementsByTagName('div');
        //find all divs with class name
        for(var i=0; i<ad_divs.length; i++){
            if(ad_divs[i].className != null && ad_divs[i].className.indexOf(div_class) != -1){
                getNextAd(ad_divs[i]);//get next ad for this div
            }
        }
    }

    this.populateAdDivs = populateAdDivs;

    function getNextAd(obj){
        var rotation_index = session_ads_index_array.length;
        var ad_index = 0;
        var last_index_from_cookie = 0;
        var last_index_from_session = session_ads_index_array[rotation_index-1];

        last_index_from_cookie = getLastIndex(ads_name, ads_count);

        if(rotation_index > 0){//check if this is the first ad of this session
            ad_index = parseInt(getAvailableAd(last_index_from_session));//grab ad index from session
        }else if(last_index_from_cookie != null){//if this is first ad of the session, check if there is a cookie set
            ad_index = parseInt(getAvailableAd(parseInt(last_index_from_cookie)));//grab ad index from cookie
        }

        createImg(ad_index, obj);//create the image and populate the div

        session_ads_index_array[next_ad_count++] = ad_index;//increment ad count for this session
        session_available_ads[ad_index] = false;//set this ad unavailable for this session
    }

    this.getNextAd = getNextAd;

    function getAvailableAd(starting_index){
        var random_ad = true;
        var avail_ad = -1;
        var avail_ad2 = -1;
        var nexti = 0;
        starting_index = parseInt(starting_index);

        if(random_ad){
            if(starting_index >= (ads_count-1)){
                starting_index = -1;
                //session_available_ads = available_ads.clone2();//repopulate ads into session when last index
                setXMLAttributes();//work around for resetting array instead of using cloning because cloning breaks wysiwyg editor for boards
            }
            nexti = Math.floor ( Math.random ( ) * ads_count + 1 ) - 1;
            //nexti = starting_index+1;
            for(; nexti<ads_count; nexti++){//get next available ad starting from starting_index
                if(session_available_ads[nexti] !== false){
                    return nexti;
                    break;
                }
            }
            //if there are not enough ads to fill the ad spots, the spot will be populated with an available unexpired ad
            //session_available_ads = available_ads.clone2();//repopulate ads into session when no ads can be found
            setXMLAttributes();//work around for resetting array instead of using cloning because cloning breaks wysiwyg editor for boards
            if(ads_count < ads_per_page){
                return 0;
            }
            return parseInt(getAvailableAd(starting_index));

        }else{
            //random not implemented
        }
    }

    this.getAvailableAd = getAvailableAd;

    function setXMLAttributes(){
        var ads = xmlDoc.getElementsByTagName('ads');
        x = xmlDoc.getElementsByTagName('ad');
        ads_name = ads[0].getAttribute('cookiename');

        var today = new Date()
        var year = today.getYear()

        if(year<1000) 
            year+=1900
             
        var today_date = (year * 10000) + ((today.getMonth()+1)*100) + (today.getDate());//get todays date as yyyymmdd

        for(var i=0; i<x.length; i++){
            var date = x[i].getElementsByTagName('date');
            var link = x[i].getElementsByTagName('link');
            if(((date[0].getAttribute('start') != null) && (date[0].getAttribute('start') != '') && (date[0].getAttribute('start') > today_date)) || ((date[0].getAttribute('expire') != null) && (date[0].getAttribute('expire') != '') && (date[0].getAttribute('expire') <= today_date))){   
            }else{//if start date set or expiration date set check if they have been triggered else
                available_ads[ads_count] = i;//add ad to the reference array
                session_available_ads[ads_count++] = i;//add ad to the session reference array
            }
        }

//      debug(session_available_ads,'');

        //set unavailable ads from previous session
        for(var i=0; i<ads_per_page; i++){
            if(parseInt(readCookie(ads_name+'['+i+']')) > -1){
                session_available_ads[parseInt(readCookie(ads_name+'['+i+']'))] = false;
            }
        }
    }

    this.setXMLAttributes = setXMLAttributes;

    function createImg(i, obj)
    {
        var ad_index = session_available_ads[i];
//      debug(session_available_ads, i + '-' + ad_index);
        var date = x[ad_index].getElementsByTagName('date');
        var img = x[ad_index].getElementsByTagName('img');
        var link = x[ad_index].getElementsByTagName('link');
        var html_anchor = document.createElement('A');

        //create anchor and img
        html_anchor.setAttribute('href',link[0].getAttribute('href'));
        var ads = xmlDoc.getElementsByTagName('ads');
        adsMediaType = ads[0].getAttribute('mediatype');
        html_anchor.setAttribute('class',adsMediaType + " promotion");
        html_anchor.setAttribute('onclick',"getPromotionOmnitureVars(this);");
        var html_img = document.createElement('IMG')
        html_img.setAttribute('src',img_path + "../../" + img[0].getAttribute('src'));
        html_img.setAttribute('alt',img[0].getAttribute('alt'));
        html_anchor.appendChild(html_img);
        html_anchor.setAttribute('target','_blank');
        html_anchor.setAttribute('title',img[0].getAttribute('alt'));
        obj.appendChild(html_anchor);//append to div
    }

    this.createImg = createImg;

    function createCookie(name,value,days) {
        if (days) {
            var date = new Date();
            date.setTime(date.getTime()+(days*24*60*60*1000));
            var expires = "; expires="+date.toGMTString();
        }
        else var expires = "";
        document.cookie = name+"="+value+expires+"; path=/";
    }

    this.createCookie = createCookie;

    function readCookie(name) {
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
            var c = ca[i];
            while (c.charAt(0)==' ') c = c.substring(1,c.length);
            if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
    }

    this.readCookie = readCookie;

    function eraseCookie(name) {
        createCookie(name,"",-1);
    }

    this.eraseCookie = eraseCookie;

    function getLastIndex(adsname,adscount){
        var last_index = null;
        for(var i=0; i<adscount; i++){
            if(readCookie(adsname+'['+i+']') != null){
                last_index = readCookie(adsname+'['+i+']');
            }else{
                break;
            }
        }
        return last_index;
    }

    this.getLastIndex = getLastIndex;

    function close(){
        //set cookies for ads that have been displayed
        for(var i=0; i<session_ads_index_array.length; i++){
            createCookie(ads_name+'['+i+']',session_ads_index_array[i],0);
        }
    }

    this.close = close;
    
    function debug(array,other){
        var str = '';
        for(var i=0; i<array.length; i++){
            str += array[i] + '-';
        }
        if(manipclass == 'footer_ad')
            alert(str + ' other=' + other);
    }
}

function getPromotionOmnitureVars(link)
{
    if (link == null)
      link = this;
      
    var domain = link.getAttribute("href");
    domain = domain.substring(domain.search("//")+2,domain.length);
    if (domain.search("/") == -1)
    {
    domain = domain.substring(0,domain.length);
    }
    else
    {    
        domain = domain.substring(0,domain.search("/"));
    }

    var parsedClassAttribute = link.className.split(" ");
    var uniqueId = parsedClassAttribute[0];

    //s.pageName is passed in through omniture code. This is assuming
    //that omniture code exists on every page. It is currently inject thru treatments
    //hence currently omniture code does exist in every page. 
    if (isOmnitureExists())
    {
        s.linkTrackVars="eVar6,eVar13,eVar14,events";
        s.eVar6 = link.getAttribute("href");
        s.eVar13 = uniqueId;
        s.eVar14 = domain;
        s.linkTrackEvents = "event15";
        s.events = s.apl(s.events,"event15",",",2);
    }     
}

function isOmnitureExists()
{
    //s.pageName is passed in through omniture code. This is assuming
    //that omniture code exists on every page. It is currently inject thru treatments
    //hence currently omniture code does exist in every page. 
    if (s != null && (s.pageName.length != 0))
        return true;
    else return false;
}

var rotating_ads1 = new RotatingAds();
var rotating_ads2 = new RotatingAds();