var traceRoutePolyine;
var paths; // Static for fetchTraceRoute to store paths info

function fetchTraceRoute(startDate, endDate) { // do a traceroute of the selected date, num selects the nth traceroute from the list, -1 means last
	// Prepare dates for query
	curTraceDate = new Date();
	if( typeof(endDate) == "undefined" )
		endDate = new Date(); // Default to today
	else {
		endDate = new Date();
		endDate.setTime(endDate*1000);
	}
	if( typeof(startDate) == "undefined" ) {
		startDate = new Date();
		startDate.setTime(endDate.getTime()-86400000*14)// Default to yesterday
	} else {
		startDate = newDate();
		startDate.setTime(startDate*1000);
	}

	// Prepare date strings for xml query
	var startString = startDate.getFullYear().toString();
	if( startDate.getMonth()+1 < 10 )  
		startString += "0" + (startDate.getMonth()+1).toString();
	else 
		startString += (startDate.getMonth()+1).toString();
	if( startDate.getDate() < 10 ) 
		startString += "0" + startDate.getDate().toString();
	else
		startString += startDate.getDate().toString();
	var endString = endDate.getFullYear().toString();
	if( endDate.getMonth()+1 < 10 )  
		endString += "0" + (endDate.getMonth()+1).toString();
	else 
		endString += (endDate.getMonth()+1).toString();
	if( endDate.getDate() < 10 ) 
		endString += "0" + endDate.getDate().toString();
	else
		endString += endDate.getDate().toString();

	makeHideBox( "Traceroutes", "traceBox", "traceDiv" );
	writit( "<p><img src=\"load.gif\" />Loading data...</p>", "traceDiv" );
	try { // traceRoutePolyline might not be defined yet.
		map.removeOverlay(traceRoutePolyline);		
	} catch (err) {}

	GDownloadUrl("http://www.ripe.net/ttm/Plots/ttmaps/routingXML.cgi?SRC=" + source[0] + "&DST=" + target[0] + "&date_start=" + startString + "&time_start=00%3A00&date_end=" + endString + "&time_end=00%3A00&sortmode=date&resolve=no&sdiff=no&type=IP&ipv=4&SUBMIT=Submit",
			function(data, responseCode) {
				if(responseCode == 200) {
					var xml = GXml.parse(data);
					paths = xml.documentElement.getElementsByTagName("path");
					showTraceRoute(-1);
				} else {
					// No valid data
					writit('<p>Sorry, there is no traceroute data available for the pair of testboxes you selected.', "traceDiv" );
				}
			});
}

var oldNum; // Save oldNum to calculate diff
function showTraceRoute(num, oldNum) {

	if( num < 0 || num > paths.length-1) 
		num = paths.length-1;

	var hops = paths[num].getElementsByTagName("hop");
	var points = new Array();
	var current; var previous;
	var dist = source[1].distanceFrom(target[1]);
	var traceText = "<p class=\"smallFont\">";
	var start = new Date();
	var end = new Date();

	// First calculate the diffs
	if( typeof(oldNum) != "undefined" ){
		var lost = new Array();
		var found = new Array();
		var ip;
		var f;
		var oldHops = paths[oldNum].getElementsByTagName("hop");
		for( var i=1; i < oldHops.length-1; i++ ) {
			ip = oldHops[i].getAttribute("ip");
			f = 0;
			for( var j=1; j < hops.length; j++ )
				if( ip == hops[j].getAttribute("ip") )
					f++
						if( f == 0 ) // We didn't find the old IP in the new list, so it must have been lost
							lost.push( i );
		}
		for( var i=1; i < hops.length-1; i++ ) {
			ip = hops[i].getAttribute("ip");
			f = 0;
			for( var j=1; j < oldHops.length; j++ )
				if( ip == oldHops[j].getAttribute("ip") )
					f++
						if( f == 0 ) // We didn't find the new IP in the old list, so it must be a new one
							found.push( i );
		}
	}

	start.setTime(paths[num].getAttribute("start")*1000);
	end.setTime(paths[num].getAttribute("end")*1000);

	traceText += "From " + source[0] + " to " + target[0] + ", "; 
	traceText += "between <strong>" + formatDate(start) + "</strong> and <strong>" + formatDate(end) + "</strong>.<br>";

	if( num > 0 ) 
		traceText += "[<a href=\"#\" onClick=\"showTraceRoute(" + (num-1) + ", " + num + ")\">Earlier</a>]";
	if( num < paths.length-1 )
		traceText += "[<a href=\"#\" onClick=\"showTraceRoute(" + (num+1) + ", " + num + ")\">Later</a>]";

	traceText += "</p><p class=\"smallFont\">";
	// As first we use our source GPS coordinates
	points.push( source[1] );
	var count = 0;
	for( var i=0; i < hops.length; i++ ) {
		// Write the text for the traceDiv
		traceText += "<span id=\"traceLine" + i + "\">";
		if( hops[i].getAttribute("ip") != "255.255.255.255" )
			traceText += i+1 + ". " + hops[i].getAttribute("ip") + " (" + hops[i].getAttribute("as") + ") ";
		else {
			try { // We don't know if hops[i+1] will work
				if( hops[i+1].getAttribute("ip") == "255.255.255.255" ) {
					count++; // Count the number of unreachable hops, so we only show them in one line.
					continue; 
				} else {
					if( count > 0 )
						traceText += (i-count+1)+"-"+(i+1)+". "+(count+1)+" Unreachable Hops";
					else
						traceText += i+1 + ". Unreachable Hop";
				}
			} catch (err) {
				traceText += i+1 + ". Unreachable Hop";
			}
		}
		if( i == 0 ) {
			traceText += "[<a href=\"#\" onClick='GEvent.trigger(gpsinfo[\"ON\"][\""+source[0]+"\"][\"marker\"], \"click\")'>"+source[0]+"</a>]";
		} else if ( i == hops.length-1 ) {
			traceText += "[<a href=\"#\" onClick='GEvent.trigger(gpsinfo[\"ON\"][\""+target[0]+"\"][\"marker\"], \"click\")'>"+target[0]+"</a>]";
		}
		traceText += "</span><br>";
		// Only draw if a hop changed and we are not having an unknown IP.
		if( hops[i].getAttribute("lat") != "0" && hops[i].getAttribute("lng") != 0 && i!=0 && i!=hops.length-1 && hops[i].getAttribute("ip") != "255.255.255.255" ) { // First and last already taken care of
			previous = current;
			current = new GLatLng(parseFloat(hops[i].getAttribute("lat")), parseFloat(hops[i].getAttribute("lng")));
			if( typeof(previous) == "undefined" || (previous != current && previous.distanceFrom(current) < dist*3) ) { // Also make sure unreasonably far away points are filter.
				points.push( current );
			}
		}
	}
	traceText += "</p>";

	traceText += "<p class=\"smallFont\"><b>Disclaimer:</b> The geolocation data is based on the <a href=\"http://www.maxmind.com/app/geolitecity\" target=\"blank\">GeoLite database</a> and might not be 100% correct.</p>";

	// And for the final point of the tracePolyline our target
	points.push( target[1] );

	// The following basically just handles the effect execution and overwriting
	// of the div in the middle of it. Also handles different cases if there happen to be no lost ones or it's the
	// first call of the tracerouter.
	if( typeof(oldNum) != "undefined" ) {
		if( lost.length != 0 ) {
			lost.each( function(hopNum) {
					if( hopNum != lost.last() ) {
						new Effect.Highlight('traceLine' + hopNum, {startcolor:'#FFFFFF', endcolor:'#FF0000'});
					} else {
						//$('traceLine'+hopNum).backgroundColor = "#FFFFFF";
						new Effect.Highlight('traceLine' + hopNum, {startcolor:'#FFFFFF', endcolor:'#FF0000', afterFinish: 
						function(obj) {
							writit( traceText, "traceDiv" );
							// And now do the effects for the newly found IPs already in the new div
							found.each( function(hopNum) {
								new Effect.Highlight('traceLine' + hopNum, {startcolor:'#FFFFFF', endcolor:'#00CC00'});
								$('traceLine'+hopNum).style.backgroundColor = "#00CC00";
							} ); 
						} 
					});
				}
			} );
		} else {
			writit( traceText, "traceDiv" );
			// And now do the effects for the newly found IPs already in the new div
			found.each( function(hopNum) {
				new Effect.Highlight('traceLine' + hopNum, {startcolor:'#FFFFFF', endcolor:'#00CC00'});
				$('traceLine'+hopNum).backgroundColor = "#00CC00";
			} );
		}
	} else {
		writit( traceText, "traceDiv" );
	}

	if( typeof( traceRoutePolyline ) != "undefined" )
		map.removeOverlay(traceRoutePolyline);
	traceRoutePolyline = new GPolyline(points, "#0000FF", 5);
	map.addOverlay(traceRoutePolyline);

	oldNum = num;
}