/*    CondeNet: AdLoader v.1.5 (2/2009)
    By: esmiling@condenet.com
    Documentation: http://wiki.conde-dev.com:8081/display/prod/DOM+Based+Advertisement+Loading+Technique
*/

/* NAMESPACES USED */
cnp = window.cnp || {};
cnp.ad = {};
cnp.util = {};

/* CONSTANTS */
cnp.ad.refreshable = 1;
cnp.ad.standard = 2;
cnp.ad.maxResizeAttempts = 10;
cnp.ad.containerClassName = "adFrameContainer";
cnp.ad.resizeErrorMargin = 40;
cnp.ad.tilingDelay = 150;

/*    UTILITY FUNCTIONS */
cnp.util.randomNumber = function (min, max) {
    return Math.floor(Math.random() * (max - min)) + min;
};
cnp.util.buildURL = function (args) {
    var uri = args.uri;
    var parameters = args.parameters;
    var seperator = args.seperator || '&';
    var joiner = args.joiner || '?';
    var retString = uri + (uri.indexOf(joiner) == -1 ? joiner : seperator);
    for (var i = 0; i < parameters.length; i++) {
        for (var param in parameters[i]) {
            if (parameters[i].hasOwnProperty(param)) {
                retString += param + '=' + parameters[i][param] + seperator;
            }
        }
    }
    if (retString.lastIndexOf(seperator) == retString.length - 1) {
        retString = retString.slice(0, retString.length - 1);
    }
    return retString;
};
cnp.util.parseParams = function (str, sep) {
    var parameters = [ ], paramPairs = [ ];
    var separator = sep || '&';
    paramPairs = str.split(sep);
    for (var i = 0; i < paramPairs.length; i++) {
        if (paramPairs[i].indexOf('=') != -1) {
            var pair = paramPairs[i].split('=');
            var param = { };
            param[pair[0]] = pair[1];
            parameters.push(param);
        }
    }
    return parameters;
};
/* begin node cleanup functions */
cnp.util.CleanerNode = function (element, eFirstChild, eLastChild) {
    this.element = element;
    this.eFirstChild = eFirstChild;
    this.eLastChild = eLastChild;
};
cnp.util.CleanerNode.prototype.validate = function (){
    if(this.getChild('firstChild') != this.eFirstChild){
        this.sanitize('firstChild');
    }
    if(this.getChild('lastChild') !=this.eLastChild){
        this.sanitize('lastChild');
    }
};
cnp.util.CleanerNode.prototype.sanitize = function (position) {
    var element = this.element[position];
    var expectedNode = (position == 'lastChild' ? this.eLastChild : this.eFirstChild);
    while(element != expectedNode){
        this.element.removeChild(element);
        delete element;
        element = this.element[position]
    }
};
cnp.util.CleanerNode.prototype.getChild = function (position) {
    return cnp.util.getChild(this.element, position);
};
cnp.util.getChild = function (parent, position) {
    //this function gets the first/last child of a node excluding non-element nodes
    var element = parent[position];
    var sibling = (position == 'lastChild' ? 'previousSibling': 'nextSibling');
    while(element.nodeType != 1){
        element = element[sibling];
    }
    return element;
};
/*end node cleanup functions*/


/*    AD MANAGER
    Manages ord, tilecount and sequential refreshes
*/
cnp.ad.manager = new function () {
    this.bodyCleanerNode = {};
    this.headCleanerNode = {};
    this.isInit = false;
    var refreshableAds = [ ], _ord, _tileCount =  0;
    function randomizeOrd() {
        _ord = cnp.util.randomNumber(10000000000000000, 99999999999999999);
    }
    randomizeOrd();
    this.addRefreshableAd = function (adUnit) {
        refreshableAds.push(adUnit);
    };
    this.reloadAds = function () {
        this.sanitizeDocument();
        randomizeOrd();
        var i=-1, clearer;
        clearer = setInterval(
            function(){
                if((i+1) < _tileCount){
                    i++;
                    refreshableAds[i].load();
                }else{
                    clearInterval(clearer);
                }
            }, cnp.ad.tilingDelay);
    };
    this.sanitizeDocument = function(){ //clean up after previously loaded ads
        this.headCleanerNode.validate();
        this.bodyCleanerNode.validate();
        for (var i = 0; i < refreshableAds.length; i++) {
            refreshableAds[i].CleanerNode.validate();
        }
    };
    this.getTileCounter = function () {
        return ++_tileCount;
    };
    this.getOrd = function () {
        return _ord;
    };
    this.init = function () {
        this.isInit = true;
        var bodyNode = document.body || document.documentElement; //parent
        var headNode = document.getElementsByTagName('HEAD')[0];
        this.headCleanerNode = new cnp.util.CleanerNode(headNode, cnp.util.getChild(headNode, 'firstChild'), cnp.util.getChild(headNode, 'lastChild'));
        this.bodyCleanerNode = new cnp.util.CleanerNode(bodyNode, cnp.util.getChild(bodyNode, 'firstChild'), cnp.util.getChild(bodyNode, 'lastChild'));
        this.reloadAds();
    };
}();
if (document.addEventListener) {
    document.addEventListener("DOMContentLoaded", function(){cnp.ad.manager.init();}, false);
}
else if (window.attachEvent){
    window.attachEvent('onload', function(){cnp.ad.manager.init();});
}

/*    DART PROPERTIES
    Stores global dart information/parameters applied to all placements
*/
cnp.ad.dart = new function () {
    var _site, _zone, _url, _parameters;
    _url = "http://ad.doubleclick.net/adj";
    _parameters = [ ];
    this.getParameters = function () {
        return _parameters;
    };
    this.getUrl = function () {
        return _url;
    };
    this.getSite = function () {
        return _site;
    };
    this.getZone = function () {
        return _zone;
    };
    this.getRequestURI = function () {
        return this.getUrl() + '/' + this.getSite() + '/' + this.getZone();
    };
    this.setSite = function (site) {
        _site = site;
    };
    this.setZone = function (zone) {
        _zone = zone;
    };
    this.addParameter =  function (obj) {
        _parameters.push(obj);
    };
    this.addParameterString =  function (str) {
        var params = cnp.util.parseParams(str, ';');
        _parameters = _parameters.concat(params);
    };
}();

/*    dartAdUnit simple factory */
cnp.ad.create = function (type, useTarget) {
    var dartAdUnit;
    if (type == cnp.ad.refreshable) {
        dartAdUnit = new cnp.ad.RefreshableDartAdUnit(useTarget);
    } else {
        dartAdUnit = new cnp.ad.DartAdUnit();
    }
    dartAdUnit.addParameter({"abr": "!webtv"});
    dartAdUnit.addParameters(cnp.ad.dart.getParameters());
    dartAdUnit.addParameter({"tile": cnp.ad.manager.getTileCounter()});
    return dartAdUnit;
};

/*    STANDARD DART AD UNIT (cnp.ad.standard)
    Provides Dart URL construction methods, and standard/legacy loading technique (document.write)
*/
cnp.ad.DartAdUnit = function () {
    this.parameters = [ ];
};
cnp.ad.DartAdUnit.prototype.addParameter = function (obj) {
    this.parameters.push(obj);
};
cnp.ad.DartAdUnit.prototype.addParameters = function (parameters) {
    this.parameters = this.parameters.concat(parameters);
};
cnp.ad.DartAdUnit.prototype.addParameterString = function (str) {
    var params = cnp.util.parseParams(str, ';');
    this.addParameters(params);
};
cnp.ad.DartAdUnit.prototype.getParameter = function (name) {
    for (var i = 0; i < this.parameters.length; i++) {
        if (name in this.parameters[i]) {
            return this.parameters[i][name];
        }
    }
};
cnp.ad.DartAdUnit.prototype.setParameter = function (name, value) {
    var param = {};
    param[name] = value;
    this.removeParameter(name);
    this.addParameter(param);
};
cnp.ad.DartAdUnit.prototype.removeParameter = function (name) {
    for (var i = 0; i < this.parameters.length; i++) {
        if (this.parameters[i][name]) {
            this.parameters.splice(i, 1);
        }
    }
};
cnp.ad.DartAdUnit.prototype.load = function () {
    if(typeof CN !== 'undefined'){
        CN.debug.warn('cnp.ad call made',[this.getDartURL(),this]);
    }
    document.write('<scr' + 'ipt language="JavaScript 1.5" type="text/javascript" src="' + this.getDartURL() + '"></scr' + 'ipt>');
};
cnp.ad.DartAdUnit.prototype.getDartURL = function () {
    this.setParameter('ord', cnp.ad.manager.getOrd());
    var requestURI = cnp.ad.dart.getRequestURI();
    var dartURL = cnp.util.buildURL({
        uri: requestURI,
        parameters: this.parameters,
        seperator: ';',
        joiner: ';'
    });
    return dartURL;
};

/*    REFRESHABLE DART AD UNIT (cnp.ad.refreshable): extends cnp.ad.standard
    Extends standard DartAdUnit, overrides load method (required for refresh behavior)
*/
cnp.ad.RefreshableDartAdUnit  = function (useTarget) {
    this.base = cnp.ad.DartAdUnit;
    this.base();
    this.useTarget = useTarget;
    this.CleanerNode = {};
    this.target = this.makeTarget();
    this.iFrame = this.makeIframe();
    cnp.ad.manager.addRefreshableAd(this);
};
cnp.ad.RefreshableDartAdUnit.prototype = new cnp.ad.DartAdUnit();
cnp.ad.RefreshableDartAdUnit.prototype.constructor = cnp.ad.RefreshableDartAdUnit;
cnp.ad.RefreshableDartAdUnit.prototype.load = function () {
    var iFrameURL = cnp.util.buildURL({
                        uri: cnp.ad.loaderFrameSrc,
                        parameters: [{"req": this.getDartURL()}]
                    });
    if(typeof CN !== 'undefined'){
        CN.debug.warn('cnp.ad - refreshable call made',[this.getDartURL(),this]);
    }

    this.getIframeDocument().location.replace(iFrameURL);
};
cnp.ad.RefreshableDartAdUnit.prototype.makeTarget = function () {
    var target, targetId;
    targetId = 'dartTarget_' + cnp.util.randomNumber(1000, 9999);
    document.write('<div id="' + targetId + '"></div>');
    target = document.getElementById(targetId);
    return target;
};
cnp.ad.RefreshableDartAdUnit.prototype.makeIframe = function (frameId) {
    var currentObject = this;
    var iFrameContainer = document.createElement('DIV');
    var iFrame = document.createElement('IFRAME');
    iFrameContainer.className = cnp.ad.containerClassName;
    iFrame.src = cnp.ad.emptyFrameSrc + '?cb=' + Math.floor(Math.random()*100000);
    iFrame.width = iFrame.height = 1;
    iFrame.frameBorder = iFrame.border = 0;
    iFrame.scrolling = 'no';
    iFrameContainer.appendChild(iFrame);
    this.target.parentNode.insertBefore(iFrameContainer, this.target);
    this.CleanerNode = new cnp.util.CleanerNode(iFrameContainer, iFrame, iFrame);
    if (iFrame.readyState) { //ie
        iFrame.onreadystatechange = function () {
            if(iFrame.readyState == 'complete'){
                currentObject.loadHandler();
            }
        };
    } else {
        iFrame.onload = function () {
            currentObject.loadHandler();
        };
    }
    return iFrame;
};
cnp.ad.DartAdUnit.prototype.loadHandler = function () {
    if(this.getIframeDocument().location.href.indexOf(cnp.ad.emptyFrameSrc) != -1){
        return;
    }
    if(this.useTarget){
        this.refreshTarget();
    }else{
        var count = 0, dartAdUnit = this;
        var outputSize = dartAdUnit.resizeFrame();
        if(!outputSize){
            var resizeTimer = setInterval(
                function(){
                    if(count < cnp.ad.maxResizeAttempts){
                        outputSize = dartAdUnit.resizeFrame();
                        count++;
                        if(outputSize > 1){
                            clearInterval(resizeTimer);
                        }
                    }else{
                        clearInterval(resizeTimer);
                    }
                }, 500);
        }
    }
};
cnp.ad.DartAdUnit.prototype.refreshTarget = function () {
    var iFrameDoc = this.getIframeDocument();
    var iFrameBody = iFrameDoc.body || iFrameDoc.documentElement;
    this.target.innerHTML = iFrameBody.innerHTML;
};
cnp.ad.DartAdUnit.prototype.getIframeDocument = function () {
    var doc = (this.iFrame.contentDocument || this.iFrame.contentWindow.document || this.iFrame.document);
    return doc;
};
cnp.ad.RefreshableDartAdUnit.prototype.resizeFrame = function () {
    var szParam, expectedWidth, expectedHeight, iframeDocument, frameWidth, frameHeight;
    function getFrameHeight() {
        var newHeight, measuredHeight;
        var bottomDiv = iframeDocument.getElementById('bottom_div');
        measuredHeight = (bottomDiv ? measuredHeight = bottomDiv.offsetTop : iframeDocument.body.scrollHeight);
        if (expectedHeight && measuredHeight != expectedHeight) {
            newHeight = (Math.abs(measuredHeight - expectedHeight) < cnp.ad.resizeErrorMargin ? expectedHeight : measuredHeight);
        } else {
            newHeight = measuredHeight;
        }
        return newHeight;
    }
    function getFrameWidth() {
        return expectedWidth;
    }
    szParam = this.getParameter('sz');
    if (szParam) {
        expectedWidth = szParam.split('x')[0];
        expectedHeight = szParam.split('x')[1];
    }
    iframeDocument = this.getIframeDocument();
    frameWidth = getFrameWidth();
    frameHeight = getFrameHeight();
    this.iFrame.width = this.iFrame.style.width = frameWidth + "px";
    this.iFrame.height = this.iFrame.style.height = frameHeight + "px";

    return frameHeight;
};