function Adverts() {}

Adverts.map = new Map().set("top","Top");
Adverts.map.set("mpu", "Middle1");
Adverts.map.set("video", "x69");
Adverts.map.set("sponsor","Top1");
Adverts.map.set("sponsor2","Right1");

/*Hello Lash, How are you today? That's nice. Bye bye. x*/

Adverts.getScriptPath = function() {
    var realMediaPrefix = "http://realmedia.channel4.com/RealMedia/ads/adstream_mjx.ads/";
	return realMediaPrefix + Adverts.getRealMediaPath();
}

Adverts.getRealMediaPath = function() {
    var realmediaPath = new StringBuilder();
    realmediaPath.append(Adverts.getHostName());
    realmediaPath.append(Adverts.getPath());
    realmediaPath.append(Adverts.getRandom());
    realmediaPath.append("@").append(Adverts.getTypes());
    //var optional = Adverts.getOptionalParameters();
   //if(optional.isNotEmpty()){
        //realmediaPath.append("?").append(optional);
   // }
    return realmediaPath.toString();
}
/* currently not using this 
Adverts.getOptionalParameters = function() {
    var result = new Parameters();
    ["from-name", "challenge-identity"].each(function(name){
        var content = Meta.getContent(name);
        if(content.isNotEmpty()){
            result.add(name, content);
        }
    });
    return result.toString();
}
*/
/*AD Target Path Account */
Adverts.getHostName = function () {
    if (location.hostname == 'www.film4.com' || location.hostname == 'beta.film4.com') {
        return "www.film4.com";

    } 
    return 'test.film4.com';
};

Adverts.getPath = function() {
    var pathname = location.pathname;
    if (pathname.endsWith('/')) {
        pathname += 'index.html/';
    } else {
        pathname += '/';
    }
    return pathname;
}

Adverts.getRandom = function() {
    return "1" + Math.random() * 100000000000000000;
}

Adverts.getTypes = function() {
    var list = new StringBuilder();
    Adverts.required.each(function(name){
       list.append(Adverts.convertToRealMediaType(name)).append(",");
    });
    return list;
}

Adverts.required = new Array()

Adverts.write = function(type){
    if (!Adverts.required.contains(type)) {
        Adverts.required.add(type);
    }
}

Adverts.isRequiredType = function(type) {
    return Adverts.required.contains(type);
}

Adverts.convertToRealMediaType = function(type){
    return Adverts.map.get(type);
}

Adverts.listeners = new Map();


Adverts.removeIfEmpty = function(e,type,d) {
	if (e.childNodes) {
		for(a in e.childNodes) {
			if(e.childNodes[a].tagName=="IMG") {
				//is the image an empty gif
				if(e.childNodes[a].src.match(/empty\.gif/)) {
					//hide placeholder
					d.style.display="none";
				}
			}	
		}
	}
}
//Adverts Display
Adverts.display = function(type) {
    var sourceDiv = document.getElementById("advert-"+type+"-parent");
    var advertDiv = document.getElementById("advert-"+type);
    sourceDiv.style.display= "none";
    if (sourceDiv != null && advertDiv != null ) {
        var ele_array = new Array();
        for (var i = 0; i < sourceDiv.childNodes.length; i++) {
			var sd = sourceDiv.childNodes[i];
            if (sd.tagName != '!' && sd.tagName != 'SCRIPT') {
                ele_array[ele_array.length] = sd;
				//check for emptys
				
				if(sd.tagName == "A") {
				   //found anchor is it an empty reference
				   Adverts.removeIfEmpty(sd,type,advertDiv);
				   
				}
				
			}
        }
        for (i = 0; i < ele_array.length; i++) {	
			if(ele_array[i].tagName== 'IMG') {
        		if(ele_array[i].src.match(/_EMPTY_/)) {
        			ele_array[i].style.display="none";
        		}
        	}
            advertDiv.appendChild(ele_array[i]);
        }
    }
}