var NokautPP = {
	unique_id  : 0,
	
	ad_format  : "468x60",
	ad_type    : "popular",
	ad_content : 0,
	ad_partner : 0,
	ad_channel : 0,
	ad_photo   : 1,
	ad_mode	   : '',
	
	color_border  : "#adabab",
	color_product : "#5272AC",
	color_price   : "#CF1E24",
	color_offers  : "#666666",
	
	init: function() {
		if (this.isDefinedVariable("nokaut_ad_format")) {
			switch (nokaut_ad_format) {
				case "750x150":
				case "600x150":
				case "468x60":
				case "300x250":
				case "160x600":
				case "160x320":
				case "120x600":
					this.ad_format = nokaut_ad_format;
					break;
			}
		}
	    if (this.isDefinedVariable("nokaut_ad_type")) {
			switch (nokaut_ad_type) {
				case "context":
				case "category":
				case "product":
				case "popular":
					this.ad_type = nokaut_ad_type;
					break;
			}
		}
		if (this.isDefinedVariable("nokaut_ad_content")) {
			this.ad_content = nokaut_ad_content;
		}
		if (this.isDefinedVariable("nokaut_ad_mode")) {
			this.ad_mode = nokaut_ad_mode;
		}		
		if (this.isDefinedVariable("nokaut_ad_partner")) {
			this.ad_partner = nokaut_ad_partner;
		}
		if (this.isDefinedVariable("nokaut_ad_channel")) {
			this.ad_channel = nokaut_ad_channel;
		}
		if (this.isDefinedVariable("nokaut_ad_photo")) {
			switch (nokaut_ad_photo) {
				case "1":
				case "true":
				case "yes":
				case "tak":
					this.ad_photo = 1;
					break;
				case "0":
				case "false":
				case "no":
				case "nie":
					this.ad_photo = 0;
					break;
			}
		}
		if (this.isDefinedVariable("nokaut_color_border")) {
			//this.color_border = nokaut_color_border;
		}
		if (this.isDefinedVariable("nokaut_color_product")) {
			//this.color_product = nokaut_color_product;
		}
		if (this.isDefinedVariable("nokaut_color_price")) {
			//this.color_price = nokaut_color_price;
		}
		if (this.isDefinedVariable("nokaut_color_offers")) {
			//this.color_offers = nokaut_color_offers;
		}
		
		// xgenerate unique id for container
        this.generateUniqueId();
		
		// render content
		this.render();
	},
	
	generateUniqueId: function() {
	    var MAX_ROTATED_ADS = 5;
	    this.unique_id = parseInt(Math.random() * MAX_ROTATED_ADS);
	    if (NokautGeneratedForms[String(this.ad_type)+"|"+this.ad_format+"|"+this.unique_id]) {
	        this.generateUniqueId();
	        return;
	    } 
	    NokautGeneratedForms[String(this.ad_type)+"|"+this.ad_format+"|"+this.unique_id] = this;
	},
	
	render: function() {
		var id = "nokaut_ads_" + this.ad_type + "_"+ this.ad_format + "_" + this.unique_id + "_result";
		
		// render linked styles
		this.renderLinkedStyles();
		
		// render inline styles
		this.renderInlineStyles(id);
		
		// render widget box
		var div = document.createElement("div");
		div.className = "NokautWidget" + this.ad_format;
		div.style.borderColor = this.color_border;
		
		// TODO: optimize
		var elements = document.getElementsByTagName("*");
		var position = elements[elements.length - 1];
		
		position.parentNode.appendChild(div);
				
		// render widget ci
		var ci = document.createElement("div");
		ci.className = "NokautWidgetCI";
		
		div.appendChild(ci);
		
		var a = document.createElement("a");
		a.setAttribute("href", "http://www.nokaut.pl#pid=" + this.ad_partner + "&cid=" + this.ad_channel);
		a.setAttribute("title", "nokaut.pl porownywarka cen");
		
		ci.appendChild(a);
		
		var span1 = document.createElement("span");
		var span2 = document.createElement("span");
		var span3 = document.createElement("span");
		
		span1.className = "NokautWidgetCILogo1";
		span2.className = "NokautWidgetCILogo2";
		span3.className = "NokautWidgetCISlogan";
		
		a.appendChild(span1);
		a.appendChild(span2);
		a.appendChild(span3);
		
		span1.innerHTML = "nokaut";
		span2.innerHTML = ".pl";
		span3.innerHTML = " porównywarka cen";
		
		// render widget content
		var ul = document.createElement("ul");
		ul.setAttribute("id", id);
		ul.className = "NokautWidgetProductsList";
		
		div.appendChild(ul);
		
		var url = "http://"+ this.getCurrentDomain() +"/pp/nokaut.php";
		url += "?partner=" + this.ad_partner;
		url += "&channel=" + this.ad_channel;
		url += "&unique="  + this.unique_id;
		url += "&photo="   + this.ad_photo;
		url += "&type="    + this.ad_type;
		url += "&format="  + this.ad_format;
		url += "&mode="    + this.ad_mode;
		
		if (this.ad_type == "context") {
			url += "&content=" + this.encode(this.getContext());
		} else {
			url += "&content=" + this.ad_content;
		}
		
		var script = document.createElement("script");
		script.setAttribute("language", "javascript");
        script.setAttribute("type", "text/javascript");
        script.setAttribute("src", url);
        script.setAttribute("charset", "utf-8");
        
        ul.appendChild(script);
	},
	
	getPageEncoding: function() {
	    
	},
	
	renderLinkedStyles: function() {
		var href = "http://css.nokaut.pl/pp/NokautWidget" + this.ad_format + ".css?ver=1.2";
		
		try { //IE
			var link = document.createStyleSheet(href);
		} catch (e) { //W3C
			var link = document.createElement("LINK");
			link.setAttribute("href", href);
			link.setAttribute("rel", "stylesheet");
			link.setAttribute("type", "text/css");
			link.setAttribute("charset", "utf-8");
			
			var head = document.getElementsByTagName('head')[0];
			head.appendChild(link);
		}
	},
	
	getCurrentDomain: function() {
		try {
			if (document.location.host.indexOf('widget.') != -1) {
				return document.location.host;
			} else {
				return 'widget.nokaut.pl';
			}
		} catch (e) {
			return 'widget.nokaut.pl';
		}
	},
	
	renderInlineStyles: function(id) {
		var styles = "<!--\n";
		styles += ".NokautWidget" + this.ad_format + " #" + id + " li a.NokautProductName {\n";
		styles += "color: " + this.color_product + ";\n";
		styles += "}\n";
		styles += ".NokautWidget" + this.ad_format + " #" + id + " li a.NokautProductPrice {\n";
		styles += "color: " + this.color_price + ";\n";
		styles += "}\n";
		styles += ".NokautWidget" + this.ad_format + " #" + id + " li a.NokautProductOffers {\n";
		styles += "color: " + this.color_offers + ";\n";
		styles += "}\n";
		styles += "-->\n";
		
		try { //IE
			var style = window.document.createStyleSheet();
			style.cssText = styles;
		} catch (e) { //w3c
			var style = document.createElement("style");
			style.setAttribute("type", "text/css");
			style.appendChild(document.createTextNode(styles));
			
			var head = document.getElementsByTagName('head')[0];
			head.appendChild(style);
		}
	},
	
	isDefinedVariable: function(variable) {
        return (typeof(window[variable]) == "undefined") ? false : true;
    },
    
    getContext: function() {
        var content = '';
    	
    	var titles = document.getElementsByTagName('title');
        var title  = titles[0].innerHTML;
        
        content += title;
        
        var metas = document.getElementsByTagName('meta');
        
        for (var i = 0; i < metas.length; i++) {
        	switch (metas[i].getAttribute('name')) {
        		case 'description':
        			content += ' ' + metas[i].getAttribute('content');
        			break;
        		case 'nokaut_ad_keywords':
        			return metas[i].getAttribute('content');
        			break;
        	}
        }
        
        return content;
    },
    
    encode: function (string) {
    	string = string.replace(/\r\n/g, " ");
    	
    	var utftext = "";
    	
    	for (var n = 0; n < string.length; n++) {
    		var c = string.charCodeAt(n);
    		
    		if (c < 128) {
    			utftext += String.fromCharCode(c);
    		} else if((c > 127) && (c < 2048)) {
    			utftext += String.fromCharCode((c >> 6) | 192);
    			utftext += String.fromCharCode((c & 63) | 128);
    		} else {
    			utftext += String.fromCharCode((c >> 12) | 224);
    			utftext += String.fromCharCode(((c >> 6) & 63) | 128);
    			utftext += String.fromCharCode((c & 63) | 128);
    		}
    	}
    	
    	return utftext;
    }
}

var NokautGeneratedForms = NokautGeneratedForms || {};

NokautPP.init();