var nms = {
	stats:{}, // Various internal stats
	updater:undefined, // Active updater
	update_time:0, // Client side timestamp for last update
	switches_management:{switches:{}},
	switches_now:{switches:{}}, // Most recent data
	switches_then:{switches:{}}, // 2 minutes old
	comments:{}, // Switch comments
	poller:{hashes:{},time:{}}, // Tracks generic poller hashes/timestamps
	speed:0, // Current aggregated speed
	ping_data:undefined, // JSON data for ping history.
	drawn:false, // Set to 'true' when switches are drawn
	switch_showing:"", // Which switch we are displaying (if any).
	switchInfo:{},
	switchInfoDrawn:{},
	repop_switch:false, // True if we need to repopulate the switch info when port state updates (e.g.: added comments);
	repop_time:false, // Timestamp in case we get a cached result
	nightMode:false, 
	/*
	 * Switch-specific variables. These are currently separate from
	 * "switches_now" because switches_now is reset every time we get
	 * new data.
	 */
	nightBlur:{}, // Have we blurred this switch or not?
	shadowBlur:10,
	shadowColor:"#EEEEEE",
	switch_color:{},  // Color for switch
	linknet_color:{}, // color for linknet
	textDrawn:{}, // Have we drawn text for this switch?
	now:false, // Date we are looking at (false for current date).
	fontSize:16, // This is scaled too, but 16 seems to make sense.
	fontFace:"Verdana",
	fontLineFactor:3,
	/*
	 * This is used to track outbound AJAX requests and skip updates if
	 * we have too many outstanding requests. The ajaxOverflow is a
	 * counter that tracks how many times this has happened.
	 *
	 * It's a cheap way to be nice to the server.
	 */
	outstandingAjaxRequests:0,
	ajaxOverflow:0,
	/*
	 * Set to 'true' after we've done some basic updating. Used to
	 * bootstrap the map quickly as soon as we have enough data, then
	 * ignored.
	 */
	did_update:false,
	/*
	 * Various setInterval() handlers. See nmsTimer() for how they are
	 * used.
	 *
	 * Cool fact: Adding one here adds it to the 'debug timers'
	 * drop-down.
	 */
	timers: {
		playback:false,
		ports:false,
		ping:false
	},
	menuShowing:true,
	/*
	 * This is a list of nms[x] variables that we store in our
	 * settings-cookie when altered and restore on load.
	 */
	settingsList:[
		'shadowBlur',
		'shadowColor',
		'nightMode',
		'menuShowing',
		'layerVisibility'
	],
	layerVisibility:{},
	keyBindings:{
		'?':toggleMenu,
		'n':toggleNightMode,
		'1':setMapModeFromN,
		'2':setMapModeFromN,
		'3':setMapModeFromN,
		'4':setMapModeFromN,
		'5':setMapModeFromN,
		'6':setMapModeFromN,
		'7':setMapModeFromN,
		'h':moveTimeFromKey,
		'j':moveTimeFromKey,
		'k':moveTimeFromKey,
		'l':moveTimeFromKey,
		'p':moveTimeFromKey,
		'r':moveTimeFromKey,
		'not-default':keyDebug
	},
  /*
   * Playback controllers and variables
   */
  playback:{
    startTime: false,
    stopTime: false,
    playing: false,
    replayTime: 0,
    replayIncrement: 60 * 60
  }
};

/*
 * Returns a handler object.
 *
 * This might seem a bit much for 'setInterval()' etc, but it's really more
 * about self-documentation and predictable ways of configuring timers.
 */
function nmsTimer(handler, interval, name, description) {
	this.handler = handler;
	this.handle = false;
	this.interval = parseInt(interval);
	this.name = name;
	this.description = description;
	this.start = function() { 
		if (this.handle) {
			this.stop();
		}
		this.handle = setInterval(this.handler,this.interval);
		};
	this.stop = function() { 
		if (this.handle)
			clearInterval(this.handle);
			this.handle = false;
		};

	this.setInterval = function(interval) {
		var started = this.handle == false ? false : true;
		this.stop();
		this.interval = parseInt(interval);
		if (started)
			this.start();
	};
}


/*
 * Drawing primitives.
 *
 * This contains both canvas and context for drawing layers. It's on a
 * top-level namespace to reduce SLIGHTLY the ridiculously long names
 * (e.g.: dr.bg.ctx.drawImage() is long enough....).
 *
 * Only initialized once (for now).
 */
var dr = {};

/*
 * Original scale. This is just used to define the coordinate system.
 * 1920x1032 was chosen for tg15 by coincidence: We scaled the underlying
 * map down to "full hd" and these are the bounds we got. There's no
 * particular reason this couldn't change, except it means re-aligning all
 * switches.
 */
var orig = {
	width:1920,
	height:1032
	};

/*
 * Canvas dimensions, and scale factor.
 *
 * We could derive scale factor from canvas.width / orig.width, but it's
 * used so frequently that this makes much more sense.
 *
 * Width and height are rarely used.
 */
var canvas = { 
	width:0,
	height:0,
	scale:1
};

/*
 * Various margins at the sides.
 *
 * Not really used much, except for "text", which is really more of a
 * padding than margin...
 */
var margin = {
	x:10,
	y:20,
	text:3
};

/*
 * Convenience-function to populate the 'dr' structure.
 *
 * Only run once.
 */
function initDrawing() {
	dr['bg'] = {};
	dr['bg']['c'] = document.getElementById("bgCanvas");
	dr['bg']['ctx'] = dr['bg']['c'].getContext('2d');
	dr['link'] = {};
	dr['link']['c'] = document.getElementById("linkCanvas");
	dr['link']['ctx'] = dr['link']['c'].getContext('2d');
	dr['blur'] = {};
	dr['blur']['c'] = document.getElementById("blurCanvas");
	dr['blur']['ctx'] = dr['blur']['c'].getContext('2d');
	dr['switch'] = {};
	dr['switch']['c'] = document.getElementById("switchCanvas");
	dr['switch']['ctx'] = dr['switch']['c'].getContext('2d');
	dr['text'] = {};
	dr['text']['c'] = document.getElementById("textCanvas");
	dr['text']['ctx'] = dr['text']['c'].getContext('2d');
	dr['textInfo'] = {};
	dr['textInfo']['c'] = document.getElementById("textInfoCanvas");
	dr['textInfo']['ctx'] = dr['textInfo']['c'].getContext('2d');
	dr['top'] = {};
	dr['top']['c'] = document.getElementById("topCanvas");
	dr['top']['ctx'] = dr['top']['c'].getContext('2d');
	dr['input'] = {};
	dr['input']['c'] = document.getElementById("inputCanvas");
	dr['input']['ctx'] = dr['top']['c'].getContext('2d');
	dr['hidden'] = {};
	dr['hidden']['c'] = document.getElementById("hiddenCanvas");
	dr['hidden']['ctx'] = dr['hidden']['c'].getContext('2d');
}

/*
 * Convenience function that doesn't support huge numbers, and it's easier
 * to comment than to fix. But not really, but I'm not fixing it anyway.
 */
function byteCount(bytes) {
	var units = ['', 'K', 'M', 'G', 'T', 'P'];
	i = 0;
	while (bytes > 1024) {
		bytes = bytes / 1024;
		i++;
	}
	return bytes.toFixed(1) + units[i];
}

/*
 * Definitely not a way to toggle night mode. Does something COMPLETELY
 * DIFFERENT.
 */
function toggleNightMode()
{
	setNightMode(!nms.nightMode);
	saveSettings();
}

/*
 * Parse 'now' from user-input.
 *
 * Should probably just use stringToEpoch() instead, but alas, not yet.
 */
function parseNow(now)
{
	if (Date.parse(now)) {
		// Adjust for timezone when converting from epoch (UTC) to string (local)
		var d = new Date(now);
		var timezoneOffset = d.getTimezoneOffset() * -60000;
		var d = new Date(Date.parse(now) - timezoneOffset);
		var str = d.getFullYear() + "-" + ("00" + (parseInt(d.getMonth())+1)).slice(-2) + "-" + ("00" + d.getDate()).slice(-2) + "T";
		str += ("00" + d.getHours()).slice(-2) + ":" + ("00" + d.getMinutes()).slice(-2) + ":" + ("00" + d.getSeconds()).slice(-2);
		return str;

	}
	if (now == "")
		return "";
	return false;
}

/*
 * Convert back and forth between epoch.
 *
 * There's no particular reason why I use seconds instead of javascript
 * microseconds, except to leave the mark of a C coder on this javascript
 * project.
 */
function stringToEpoch(t)
{
	var foo = t.toString();
//	foo = foo.replace('T',' ');
	var ret = new Date(Date.parse(foo));
	return parseInt(parseInt(ret.valueOf()) / 1000);
}

/*
 * Have to pad with zeroes to avoid "17:5:0" instead of the conventional
 * and more readable "17:05:00". I'm sure there's a better way, but this
 * works just fine.
 */
function epochToString(t)
{
	// Adjust for timezone when converting from epoch (UTC) to string (local)
	var d = new Date(parseInt(t) * parseInt(1000));
	var timezoneOffset = d.getTimezoneOffset() * -60;
	t = t - timezoneOffset;

	var d = new Date(parseInt(t) * parseInt(1000));
	var str = d.getFullYear() + "-";
	if (parseInt(d.getMonth()) < 9)
		str += "0";
	str += (parseInt(d.getMonth())+1) + "-";
	if (d.getDate() < 10)
		str += "0";
	str += d.getDate() + "T";
	if (d.getHours() < 10)
		str += "0";
	str += d.getHours() + ":";
	if (d.getMinutes() < 10)
		str += "0";
	str += d.getMinutes() + ":";
	if (d.getSeconds() < 10)
		str += "0";
	str += d.getSeconds();

	return str;
}
function localEpochToString(t) {
  var d = new Date(parseInt(t) * parseInt(1000));
  var timezoneOffset = d.getTimezoneOffset() * -60;
  t = t + timezoneOffset;

  return epochToString(t);
}

/*
 * Start replaying historical data.
 */
nms.playback.startReplay = function(startTime,stopTime) {
  if(!startTime || !stopTime)
    return false;

  nms.playback.pause();
  nms.playback.startTime = stringToEpoch(startTime);
  nms.playback.stopTime = stringToEpoch(stopTime);
  nms.now = epochToString(nms.playback.startTime);
  nms.playback.play();
}
/*
 * Pause playback
 */
nms.playback.pause = function() {
  nms.timers.playback.stop();
  nms.playback.playing = false;
}
/*
 * Start playback
 */
nms.playback.play = function() {
  nms.playback.tick();
  nms.timers.playback.start();
  nms.playback.playing = true;
}
/*
 * Toggle playback
 */
nms.playback.toggle = function() {
  if(nms.playback.playing) {
    nms.playback.pause();
  } else {
    nms.playback.play();
  }
}
/*
 * Jump to place in time
 */
nms.playback.setNow = function(now) {
  resetSwitchStates();
  now = parseNow(now);
  nms.now = now;

  nms.playback.stopTime = false;
  nms.playback.startTime = false;
  nms.playback.tick();
}
/*
 * Step forwards or backwards in timer
 */
nms.playback.stepTime = function(n)
{
  now = getNowEpoch();
  newtime = parseInt(now) + parseInt(n);
  nms.now = epochToString(parseInt(newtime));

  if(!nms.playback.playing)
    nms.playback.tick();
}
/*
 * Ticker to trigger updates, and advance time if replaying
 *
 * This is run on a timer (nms.timers.tick) every second while unpaused
 */
nms.playback.tick = function()
{
  nms.playback.replayTime = getNowEpoch();

  // If outside start-/stopTime, remove limits and pause playback
  if (nms.playback.stopTime && (nms.playback.replayTime >= nms.playback.stopTime || nms.playback.replayTime < nms.playback.startTime)) {
    nms.playback.stopTime = false;
    nms.playback.startTime = false;
    nms.playback.pause();
    return;
  }

  // If past actual datetime, go live
  if (nms.playback.replayTime > parseInt(Date.now() / 1000)) {
    nms.now = false;
  }

  // If we are still replaying, advance time
  if(nms.now !== false && nms.playback.playing) {
    nms.playback.stepTime(nms.playback.replayIncrement);
  }

  // Update data and force redraw
  updatePorts();
  updatePing();
  nms.updater.updater();
}
/*
 * Helper function for safely getting a valid now-epoch
 */
function getNowEpoch() {
  if (nms.now && nms.now != 0)
    return stringToEpoch(nms.now);
  else
    return parseInt(Date.now() / 1000);
}


/*
 * Hide switch info-box
 */
function hideSwitch()
{
		var swtop = document.getElementById("info-switch-parent");
		var switchele = document.getElementById("info-switch-table");
		var comments = document.getElementById("info-switch-comments-table");
		if (switchele != undefined)
			switchele.parentNode.removeChild(switchele);
		if (comments != undefined)
			comments.parentNode.removeChild(comments);
		commentbox = document.getElementById("commentbox");
		if (commentbox != undefined)
			commentbox.parentNode.removeChild(commentbox);
		swtop.style.display = 'none';
		nms.switch_showing = "";
}
/*
 * Display info on switch "x" in the info-box
 *
 * FIXME: THIS IS A MONSTROSITY.
 */
function showSwitch(x)
{
		var sw = nms.switches_now["switches"][x];
		var swm = nms.switches_management[x];
		var swtop = document.getElementById("info-switch-parent");
		var swpanel = document.getElementById("info-switch-panel-body");
		var swtitle = document.getElementById("info-switch-title");
		var tr;
		var td1;
		var td2;
	
		hideSwitch();	
		nms.switch_showing = x;
		document.getElementById("aboutBox").style.display = "none";
		var switchele = document.createElement("table");
		switchele.id = "info-switch-table";
		switchele.className = "table";
		switchele.classList.add("table");
		switchele.classList.add("table-condensed");
		
		swtitle.innerHTML = x + '<button type="button" class="close" aria-labe="Close" onclick="hideSwitch();" style="float: right;"><span aria-hidden="true">&times;</span></button>';
		var speed = 0;
		var speed2 = 0;
		for (port in nms.switches_now["switches"][x]["ports"]) {
			if (nms.switches_now["switches"][x]["ports"] == undefined ||
			    nms.switches_then["switches"][x]["ports"] == undefined) {
				continue;
			}
			if (/ge-0\/0\/44$/.exec(port) ||
			    /ge-0\/0\/45$/.exec(port) ||
			    /ge-0\/0\/46$/.exec(port) ||
			    /ge-0\/0\/47$/.exec(port))
			 {
				 var t = nms.switches_then["switches"][x]["ports"][port];
				 var n = nms.switches_now["switches"][x]["ports"][port];
				 speed += (parseInt(t["ifhcoutoctets"]) - parseInt(n["ifhcoutoctets"])) / (parseInt(t["time"] - n["time"]));
				 speed2 += (parseInt(t["ifhcinoctets"]) - parseInt(n["ifhcinoctets"])) / (parseInt(t["time"] - n["time"]));
			 }
		}

		tr = switchele.insertRow(-1);
		td1 = tr.insertCell(0);
		td2 = tr.insertCell(1);
		td1.innerHTML = "Uplink speed (out , port 44-47)";
		td2.innerHTML = byteCount(8 * speed) + "b/s";

		tr = switchele.insertRow(-1);
		td1 = tr.insertCell(0);
		td2 = tr.insertCell(1);
		td1.title = "Port 44, 45, 46 and 47 are used as uplinks.";
		td1.innerHTML = "Uplink speed (in , port 44-47)";
		td2.innerHTML = byteCount(8 * speed2) + "b/s";

		speed = 0;
		for (port in nms.switches_now["switches"][x]["ports"]) {
			if (nms.switches_now["switches"][x]["ports"] == undefined ||
			    nms.switches_then["switches"][x]["ports"] == undefined) {
				continue;
			}
			 var t = nms.switches_then["switches"][x]["ports"][port];
			 var n = nms.switches_now["switches"][x]["ports"][port];
			 speed += (parseInt(t["ifhcinoctets"]) -parseInt(n["ifhcinoctets"])) / (parseInt(t["time"] - n["time"]));
		}

		tr = switchele.insertRow(-1);
		td1 = tr.insertCell(0);
		td2 = tr.insertCell(1);
		td1.innerHTML = "Total speed (in)";
		td2.innerHTML = byteCount(8 * speed) + "b/s";

		speed = 0;
		for (port in nms.switches_now["switches"][x]["ports"]) {
			if (nms.switches_now["switches"][x]["ports"] == undefined ||
			    nms.switches_then["switches"][x]["ports"] == undefined) {
				continue;
			}
			 var t = nms.switches_then["switches"][x]["ports"][port];
			 var n = nms.switches_now["switches"][x]["ports"][port];
			 speed += (parseInt(t["ifhcoutoctets"]) -parseInt(n["ifhcoutoctets"])) / (parseInt(t["time"] - n["time"]));
		}

		tr = switchele.insertRow(-1);
		td1 = tr.insertCell(0);
		td2 = tr.insertCell(1);
		td1.innerHTML = "Total speed (out)";
		td2.innerHTML = byteCount(8 * speed) + "b/s";

		for (v in sw) { 
			tr = switchele.insertRow(-1);
			td1 = tr.insertCell(0);
			td2 = tr.insertCell(1);
			td1.innerHTML = v;
			td2.innerHTML = sw[v];
		}
		for (v in swm) { 
			tr = switchele.insertRow(-1);
			td1 = tr.insertCell(0);
			td2 = tr.insertCell(1);
			td1.innerHTML = v;
			td2.innerHTML = swm[v];
		}

		comments = document.createElement("table");
		comments.id = "info-switch-comments-table";
		comments.className = "table table-condensed";
		var cap = document.createElement("caption");
		cap.textContent = "Comments";
		comments.appendChild(cap);
	
		var has_comment = false;
		if (nms.comments[x] == undefined) {
			nms.comments[x] = {};
			nms.comments[x]["comments"] = [];
		}
		for (var c in nms.comments[x]["comments"]) {
			var comment = nms.comments[x]["comments"][c];
			has_comment = true;
			if (comment["state"] == "active" || comment["state"] == "persist" || comment["state"] == "inactive") {
				tr = comments.insertRow(-1);
				var col;
				if (comment["state"] == "active")
					col = "danger";
				else if (comment["state"] == "inactive")
					col = false;
				else
					col = "info";
				tr.className = col;
				tr.id = "commentRow" + comment["id"];
				td1 = tr.insertCell(0);
				td2 = tr.insertCell(1);
				td1.style.whiteSpace = "nowrap";
				td1.style.width = "8em";
				var txt =  '<div class="btn-group" role="group" aria-label="..."><button type="button" class="btn btn-xs btn-default" data-trigger="focus" data-toggle="popover" title="Info" data-content="Comment added ' + epochToString(comment["time"]) + " by user " + comment["username"] + ' and listed as ' + comment["state"] + '"><span class="glyphicon glyphicon-info-sign" aria-hidden="true"></span></button>';
				txt += '<button type="button" class="btn btn-xs btn-danger" data-trigger="focus" data-toggle="tooltip" title="Mark as deleted" onclick="commentDelete(' + comment["id"] + ');"><span class="glyphicon glyphicon-remove" aria-hidden="true"></span></button>';
				txt += '<button type="button" class="btn btn-xs btn-success" data-trigger="focus" data-toggle="tooltip" title="Mark as inactive/fixed" onclick="commentInactive(' + comment["id"] + ');"><span class="glyphicon glyphicon-ok" aria-hidden="true"></span></button>';
				txt += '<button type="button" class="btn btn-xs btn-info" data-trigger="focus" data-toggle="tooltip" title="Mark as persistent" onclick="commentPersist(' + comment["id"] + ');"><span class="glyphicon glyphicon-star" aria-hidden="true"></span></button></div>';
				td1.innerHTML = txt;
				td2.textContent = comment['comment'];
			}
		}
		
		swtop.appendChild(switchele);
		if (has_comment) {
			swtop.appendChild(comments);
			$(function () { $('[data-toggle="popover"]').popover({placement:"top",continer:'body'}) })
		}
		var commentbox = document.createElement("div");
		commentbox.id = "commentbox";
		commentbox.className = "panel-body";
		commentbox.style.width = "100%";
		commentbox.innerHTML = '<div class="input-group"><input type="text" class="form-control" placeholder="Comment" id="' + x + '-comment"><span class=\"input-group-btn\"><button class="btn btn-default" onclick="addComment(\'' + x + '\',document.getElementById(\'' + x + '-comment\').value); document.getElementById(\'' + x + '-comment\').value = \'\'; document.getElementById(\'' + x + '-comment\').placeholder = \'Comment added. Wait for next refresh.\';">Add comment</button></span></div>';
		swtop.appendChild(commentbox);
		swtop.style.display = 'block';
}

/*
 * There are 4 legend-bars. This is a helper-function to set the color and
 * description/name for each one. Used from handler init-functions.
 *
 * FIXME: Should be smarter, possibly use a canvas-writer so we can get
 * proper text (e.g.: not black text on dark blue). 
 */
function setLegend(x,color,name)
{
	var el = document.getElementById("legend-" + x);
	el.style.background = color;
	el.title = name;
	el.textContent = name;
}

function updateAjaxInfo()
{
	var out = document.getElementById('outstandingAJAX');
	var of = document.getElementById('overflowAJAX');
	out.textContent = nms.outstandingAjaxRequests;
	of.textContent = nms.ajaxOverflow;
}
/*
 * Run periodically to trigger map updates when a handler is active
 */
function updateMap()
{
	/*
	 * XXX: This a bit hacky: There are a bunch of links that use
	 * href="#foo" but probably shouldn't. This breaks refresh since we
	 * base this on the location hash. To circumvent that issue
	 * somewhat, we just update the location hash if it's not
	 * "correct".
	 */
	if (nms.updater) {
		if (document.location.hash != ('#' + nms.updater.tag)) {
			document.location.hash = nms.updater.tag;
		}
	}
	if (!newerSwitches())
		return;
	if (!nms.drawn)
		setScale();
	if (!nms.drawn)
		return;
	if (!nms.ping_data)
		return;
	nms.update_time = Date.now();
	
	if (nms.updater != undefined && nms.switches_now && nms.switches_then) {
		nms.updater.updater();
	}
	drawNow();
}

/*
 * Change map handler (e.g., change from uplink map to ping map)
 */
function setUpdater(fo)
{
	nms.updater = undefined;
	resetColors();
	resetTextInfo();
	fo.init();
	nms.updater = fo;
	var foo = document.getElementById("updater_name");
	foo.innerHTML = fo.name + "   ";
	document.location.hash = fo.tag;
	initialUpdate();
	if (nms.ping_data && nms.switches_then && nms.switches_now) {
		nms.updater.updater();
	}
}

/*
 * Helper function for updating switch-data without overwriting existing
 * data with non-existent data
 */
function updateSwitches(switchdata,target) {
	target['time'] = switchdata['time'] //Assume we always get time

	if(switchdata.switches != undefined) {
		for(var sw in switchdata.switches) {
			if(switchdata.switches[sw]['management'] != undefined)
				updateSwitchProperty(sw,'management',switchdata.switches[sw]['management'],target);
			if(switchdata.switches[sw]['ports'] != undefined)
				updateSwitchProperty(sw,'ports',switchdata.switches[sw]['ports'],target);
			if(switchdata.switches[sw]['temp'] != undefined)
				updateSwitchProperty(sw,'temp',switchdata.switches[sw]['temp'],target);
			if(switchdata.switches[sw]['temp_time'] != undefined)
				updateSwitchProperty(sw,'temp_time',switchdata.switches[sw]['temp_time'],target);
			if(switchdata.switches[sw]['placement'] != undefined)
				updateSwitchProperty(sw,'placement',switchdata.switches[sw]['placement'],target);
		}
	}
}
/*
 * Helper function for updating a limited subset of switch properties,
 * while the current state of the switch data is unknown.
 */
function updateSwitchProperty(sw,property,data,target) {
  if(target.switches[sw] == undefined)
    target.switches[sw] = {};

  target.switches[sw][property] = data;
}

/*
 * Helper function for reseting switch state data (and keeping more permanent data)
 */
function resetSwitchStates() {
  for (var sw in nms.switches_now.switches) {
    for (var property in nms.switches_now.switches[sw]) {
      if (['ports','temp','temp_time'].indexOf(property) > -1) {
        nms.switches_now.switches[sw][property] = undefined;
      }
    }
  }
}

/*
 * Convenience function to avoid waiting for pollers when data is available
 * for the first time.
 */
function initialUpdate()
{
	return;
	if (nms.ping_data && nms.switches_then && nms.switches_now && nms.updater != undefined && nms.did_update == false ) {
		resizeEvent();
		if (!nms.drawn) {
			drawSwitches();
			drawLinknets();
		}
		nms.updater.updater();
		nms.did_update = true;
	}
}

function resetBlur()
{
	nms.nightBlur = {};
	dr.blur.ctx.clearRect(0,0,canvas.width,canvas.height);
	drawSwitches();
}

function applyBlur()
{
	var blur = document.getElementById("shadowBlur");
	var col = document.getElementById("shadowColor");
	nms.shadowBlur = blur.value;
	nms.shadowColor = col.value;
	resetBlur();
	saveSettings();
}

function showBlurBox()
{
	var blur = document.getElementById("shadowBlur");
	var col = document.getElementById("shadowColor");
	blur.value = nms.shadowBlur;
	col.value = nms.shadowColor;
	document.getElementById("blurManic").style.display = '';
}
/*
 * Update nms.ping_data 
 */
function updatePing()
{
	var now = nms.now ? ("?now=" + nms.now) : "";
	if (nms.outstandingAjaxRequests > 5) {
		nms.ajaxOverflow++;
		updateAjaxInfo();
		return;
	}
	nms.outstandingAjaxRequests++;
	$.ajax({
		type: "GET",
		url: "/api/public/ping" + now,
		dataType: "text",
		success: function (data, textStatus, jqXHR) {
			nms.ping_data = JSON.parse(data);
			initialUpdate();
			updateMap();
		},
		complete: function(jqXHR, textStatus) {
			nms.outstandingAjaxRequests--;
			updateAjaxInfo();
		}
	});
}

function commentInactive(id)
{
	commentChange(id,"inactive");
}

function commentPersist(id)
{
	commentChange(id,"persist");
}

function commentDelete(id)
{
	var r = confirm("Really delete comment? (Delted comments are still stored in the database, but never displayed)");
	if (r == true) {
		commentChange(id,"delete");
	}
}

/*
 * FIXME: Neither of these two handle failures in any way, shape or form.
 * Nor do they really give user-feedback. They work, but only by magic.
 */
function commentChange(id,state)
{
	var myData = {
		comment:id,
		state:state
	};
	var foo = document.getElementById("commentRow" + id);
	if (foo) {
		foo.className = '';
		foo.style.backgroundColor = "silver";
	}
	$.ajax({
		type: "POST",
		url: "/api/private/comment-change",
		dataType: "text",
		data:myData,
		success: function (data, textStatus, jqXHR) {
			nms.repop_switch = true;
		}
	});
}

function addComment(sw,comment)
{
	var myData = {
		switch:sw,
		comment:comment
	};
	myData = JSON.stringify(myData);
	$.ajax({
		type: "POST",
		url: "/api/private/comment-add",
		dataType: "text",
		data:myData,
		success: function (data, textStatus, jqXHR) {
			nms.repop_switch = true;
		}
	});
}

/*
 * FIXME: Not at all done.
 *
 * genericUpdater() should be something one registers for, then it
 * automatically picks up intervals based on max-age from the backend, and
 * allows forced updates (E.g.: force polling comments after a comment is
 * added, force polling switches after switches has been changed).
 *
 */
function doMiscUpdates() {
	genericUpdater("comments","comments", "/api/private/comments");
	genericUpdater("switches_management", "switches", "/api/private/switches-management");
}

function nmsStatsInc(stat) {
	if (nms.stats[stat] == undefined)
		nms.stats[stat] = 0;
	nms.stats[stat]++;
}
/*
 * Updates nms[name] with data fetched from remote target in variable
 * "remotename". If a callback is provided, it is called with argument meh.
 *
 * This also populates nms.pollers[name] with the server-provided hash.
 * Only if a change is detected is the callback issued.
 */
function genericUpdater(name, remotename, target, cb, meh) {
	if (nms.outstandingAjaxRequests > 5) {
		nms.ajaxOverflow++;
		updateAjaxInfo();
		return;
	}
	nms.outstandingAjaxRequests++;
	var now = "";
	if (nms.now != false)
		now = "now=" + nms.now;
	if (now != "") {
		if (target.match("\\?"))
			now = "&" + now;
		else
			now = "?" + now;
	}

	$.ajax({
		type: "GET",
		url: target + now,
		dataType: "text",
		success: function (data, textStatus, jqXHR) {
			var  indata = JSON.parse(data);
			if (nms.poller.hashes[name] != indata['hash']) {
				nms[name] = indata[remotename];
				nms.poller.hashes[name] = indata['hash'];
				nms.poller.time[name] = indata['time'];
				if (cb != undefined) {
					cb(meh);
				}
			} else {
				nmsStatsInc("identicalFetches");
			}
		},
		complete: function(jqXHR, textStatus) {
			nms.outstandingAjaxRequests--;
			updateAjaxInfo();
		}
	});
}

/*
 * Update nms.switches_now and nms.switches_then
 */
function updatePorts()
{
	var now = "";
	if (nms.outstandingAjaxRequests > 5) {
		nms.ajaxOverflow++;
		updateAjaxInfo();
		return;
	}
	nms.outstandingAjaxRequests++;
	if (nms.now != false)
		now = "?now=" + nms.now;
	$.ajax({
		type: "GET",
		url: "/api/private/port-state"+ now ,
		dataType: "text",
		success: function (data, textStatus, jqXHR) {
			var  switchdata = JSON.parse(data);
			updateSwitches(switchdata,nms.switches_now);
			initialUpdate();
			updateSpeed();
			updateMap();
			if (nms.repop_time == false && nms.repop_switch)
				nms.repop_time = nms.switches_now.time;
			else if (nms.repop_switch && nms.switch_showing && nms.repop_time != nms.switches_now.time) {
				showSwitch(nms.switch_showing,true);
				nms.repop_switch = false;
				nms.repop_time = false;
			}
		},
		complete: function(jqXHR, textStatus) {
			nms.outstandingAjaxRequests--;
			updateAjaxInfo();
		}
	});
	nms.outstandingAjaxRequests++;
	$.ajax({
		type: "GET",
		url: "/api/public/switches"+ now ,
		dataType: "text",
		success: function (data, textStatus, jqXHR) {
			var switchdata = JSON.parse(data);
			updateSwitches(switchdata,nms.switches_now);
			parseIntPlacements();
		},
		complete: function(jqXHR, textStatus) {
			nms.outstandingAjaxRequests--;
			updateAjaxInfo();
		}
	});
	now="";
	if (nms.now != false)
		now = "?now=" + nms.now;
	nms.outstandingAjaxRequests++;
	updateAjaxInfo();
	$.ajax({
		type: "GET",
		url: "/api/private/port-state" + now,
		dataType: "text",
		success: function (data, textStatus, jqXHR) {
			var  switchdata = JSON.parse(data);
			updateSwitches(switchdata,nms.switches_then);
			initialUpdate();
			updateSpeed();
			updateMap();
		},
		complete: function(jqXHR, textStatus) {
			nms.outstandingAjaxRequests--;
			updateAjaxInfo();
		}
	})
}

/*
 * Returns true if we have now and then-data for switches and that the
 * "now" is actually newer. Useful for basic sanity and avoiding negative
 * values when rewinding time.
 */
function newerSwitches()
{
	if (nms.switches_now.time == undefined || nms.switches_then.time == undefined)
		return false;
	var now_timestamp = stringToEpoch(nms.switches_now.time);
	var then_timestamp = stringToEpoch(nms.switches_then.time);
	if (now_timestamp == 0 || then_timestamp == 0 || then_timestamp >= now_timestamp)
		return false;
	return true;
}
/*
 * Use nms.switches_now and nms.switches_then to update 'nms.speed'.
 *
 * nms.speed is a total of ifHCInOctets across all client-interfaces
 * nms.speed_full is a total of for /all/ interfaces.
 *
 * This is run separate of updatePorts mainly for historic reasons, but
 * if it was added to the tail end of updatePorts, there'd have to be some
 * logic to ensure it was run after both requests. Right now, it's just
 * equally wrong for both scenarios, not consistently wrong (or something).
 *
 * FIXME: Err, yeah, add this to the tail-end of updatePorts instead :D
 *
 */

function updateSpeed()
{
	var speed_in = parseInt(0);
	var speed_full = parseInt(0);
	var counter=0;
	var sw;
	var speedele = document.getElementById("speed");
	if (!newerSwitches())
		return;
	for (sw in nms.switches_now["switches"]) {
		for (port in nms.switches_now["switches"][sw]["ports"]) {
			if (!nms.switches_now["switches"][sw]["ports"][port]) {
				console.log("ops");
				continue;
			}
			if (!nms.switches_then || !nms.switches_then["switches"] || !nms.switches_then["switches"][sw] || !nms.switches_then["switches"][sw]["ports"]) {
				continue;
			}
			if (!nms.switches_now || !nms.switches_now["switches"] || !nms.switches_now["switches"][sw] || !nms.switches_now["switches"][sw]["ports"]) {
				continue;
			}

			if (!nms.switches_then["switches"][sw]["ports"][port]) {
				console.log("ops");
				continue;
			}
			var diff = parseInt(parseInt(nms.switches_now["switches"][sw]["ports"][port]["time"]) - parseInt(nms.switches_then["switches"][sw]["ports"][port]["time"]));
			var then = parseInt(nms.switches_then["switches"][sw]["ports"][port]["ifhcinoctets"])  ;
			var now =  parseInt(nms.switches_now["switches"][sw]["ports"][port]["ifhcinoctets"]) ;
			var diffval = (now - then);
			if (then == 0 || now == 0 || diffval == 0 || diffval == NaN) {
				continue;
			}
			speed_full += parseInt(diffval/diff);
			if (( /e\d-\d/.exec(sw) || /e\d\d-\d/.exec(sw)) &&  ( /ge-\d\/\d\/\d$/.exec(port) || /ge-\d\/\d\/\d\d$/.exec(port))) {
				if (!(
					/ge-0\/0\/44$/.exec(port) ||
					/ge-0\/0\/45$/.exec(port) ||
					/ge-0\/0\/46$/.exec(port) ||
					/ge-0\/0\/47$/.exec(port))) {
					speed_in += parseInt(diffval/diff) ;
					counter++;
				}
			}
		}
	}
	nms.speed = speed_in;
	nms.speed_full = speed_full;
	if (speedele) {
		speedele.innerHTML = byteCount(8 * parseInt(nms.speed)) + "b/s";
		speedele.innerHTML += " / " + byteCount(8 * parseInt(nms.speed_full)) + "b/s";

	}
}

/*
 * Draw a linknet with index i.
 *
 * XXX: Might have to change the index here to match backend
 */
function drawLinknet(i)
{
	var c1 = nms.linknet_color[i] && nms.linknet_color[i].c1 ? nms.linknet_color[i].c1 : blue;
	var c2 = nms.linknet_color[i] && nms.linknet_color[i].c2 ? nms.linknet_color[i].c2 : blue;
	if (nms.switches_now.switches[nms.switches_now.linknets[i].sysname1] && nms.switches_now.switches[nms.switches_now.linknets[i].sysname2]) {
		connectSwitches(nms.switches_now.linknets[i].sysname1,nms.switches_now.linknets[i].sysname2, c1, c2);
	}
}

/*
 * Draw all linknets
 */
function drawLinknets()
{
	if (nms.switches_now && nms.switches_now.linknets) {
		for (var i in nms.switches_now.linknets) {
			drawLinknet(i);
		}
	}
}

/*
 * Change both colors of a linknet.
 *
 * XXX: Probably have to change this to better match the backend data
 */
function setLinknetColors(i,c1,c2)
{
	if (!nms.linknet_color[i] || 
 	     nms.linknet_color[i].c1 != c1 ||
	     nms.linknet_color[i].c2 != c2) {
		if (!nms.linknet_color[i])
			nms.linknet_color[i] = {};
		nms.linknet_color[i]['c1'] = c1;
		nms.linknet_color[i]['c2'] = c2;
		drawLinknet(i);
	}
}

/*
 * (Re)draw a switch 'sw'.
 *
 * Color defaults to 'blue' if it's not set in the data structure.
 */
function drawSwitch(sw)
{
		var box = nms.switches_now['switches'][sw]['placement'];
		var color = nms.switch_color[sw];
		if (color == undefined) {
			color = blue;
		}
		dr.switch.ctx.fillStyle = color;
		/*
		 * XXX: This is a left-over from before NMS did separate
		 * canvases, and might be done better elsewhere.
		 */
		if (nms.nightMode && nms.nightBlur[sw] != true) {
			dr.blur.ctx.shadowBlur = nms.shadowBlur;
			dr.blur.ctx.shadowColor = nms.shadowColor;
			drawBoxBlur(box['x'],box['y'],box['width'],box['height']);
			nms.nightBlur[sw] = true;
		}
		drawBox(box['x'],box['y'],box['width'],box['height']);
		dr.switch.ctx.shadowBlur = 0;
		if (!nms.textDrawn[sw]) {
			if ((box['width'] + 10 )< box['height']) {
				drawSideways(dr.text.ctx, sw,box['x'],box['y'],box['width'],box['height']);
			} else {
				drawRegular(dr.text.ctx,sw,box['x'],box['y'],box['width'],box['height']);
			}
			
			nms.textDrawn[sw] = true;
		}
}

/*
 * Make sure all placements of switches are parsed as integers so we don't
 * have to pollute the code with pasreInt() every time we use it.
 */
function parseIntPlacements() {
	for (var sw in nms.switches_now.switches) {
		nms.switches_now.switches[sw]['placement']['x'] =
			parseInt(nms.switches_now.switches[sw]['placement']['x']);
		nms.switches_now.switches[sw]['placement']['y'] =
			parseInt(nms.switches_now.switches[sw]['placement']['y']);
		nms.switches_now.switches[sw]['placement']['width'] =
			parseInt(nms.switches_now.switches[sw]['placement']['width']);
		nms.switches_now.switches[sw]['placement']['height'] =
			parseInt(nms.switches_now.switches[sw]['placement']['height']);
	}
}

/*
 * Draw all switches
 */
function drawSwitches()
{
	if (!nms.switches_now || !nms.switches_now.switches)
		return;
	for (var sw in nms.switches_now.switches) {
		drawSwitch(sw);
	}
	nms.drawn = true;
}
function drawSwitchInfo()
{
	if (!nms.switches_now || !nms.switches_now.switches)
		return;
	for (var sw in nms.switchInfo) {
		switchInfoText(sw, nms.switchInfo[sw]);
	}
	nms.drawn = true;
}

/*
 * Draw current time-window
 *
 * FIXME: The math here is just wild approximation and guesswork because
 * I'm lazy.
 */
function drawNow()
{
	if (!nms.switches_now)
		return;
	// XXX: Get rid of microseconds that we get from the backend.
	var now = /^[^.]*/.exec(nms.switches_now.time);
	dr.top.ctx.font = Math.round(2 * nms.fontSize * canvas.scale) + "px " + nms.fontFace;
	dr.top.ctx.clearRect(0,0,Math.floor(800 * canvas.scale),Math.floor(100 * canvas.scale));
	dr.top.ctx.fillStyle = "white";
	dr.top.ctx.strokeStyle = "black";
	dr.top.ctx.lineWidth = Math.floor(nms.fontLineFactor * canvas.scale);
	if (dr.top.ctx.lineWidth == 0) {
		dr.top.ctx.lineWidth = Math.round(nms.fontLineFactor * canvas.scale);
	}
	dr.top.ctx.strokeText(now, 0 + margin.text, 25 * canvas.scale);
	dr.top.ctx.fillText(now, 0 + margin.text, 25 * canvas.scale);
}
/*
 * Draw foreground/scene.
 *
 * FIXME: Review this! This was made before linknets and switches were
 * split apart.
 *
 * This is used so linknets are drawn before switches. If a switch is all
 * that has changed, we just need to re-draw that, but linknets require
 * scene-redrawing.
 */
function drawScene()
{
	dr.text.ctx.font = Math.floor(nms.fontSize * canvas.scale) + "px " + nms.fontFace;
	dr.textInfo.ctx.font = Math.floor(nms.fontSize * canvas.scale) + "px " + nms.fontFace;
	drawLinknets();
	drawSwitches();
	drawSwitchInfo();
}

/*
 * Set the scale factor and (re)draw the scene and background.
 * Uses canvas.scale and updates canvas.height and canvas.width.
 */
function setScale()
{
	canvas.height =  orig.height * canvas.scale ;
	canvas.width = orig.width * canvas.scale ;
	for (var a in dr) {
		/*
		 * Resizing this to a too small size breaks gradients on smaller screens.
		 */
		if (a == 'hidden')
			continue;
		dr[a].c.height = canvas.height;
		dr[a].c.width = canvas.width;
	}
	nms.nightBlur = {};
	nms.textDrawn = {};
	nms.switchInfoDrawn = {};
	if (nms.gradients)
		drawGradient(nms.gradients);
	drawBG();
	drawScene();
	drawNow();
	
	document.getElementById("scaler").value = canvas.scale;
	document.getElementById("scaler-text").innerHTML = (parseFloat(canvas.scale)).toPrecision(3);
}

/*
 * Returns true if the coordinates (x,y) is inside the box defined by
 * box.{x,y,w.h} (e.g.: placement of a switch).
 */
function isIn(box, x, y)
{
	if ((x >= box.x) && (x <= (box.x + box.width)) && (y >= box.y) && (y <= (box.y + box.height))) {
		return true;
	}
	return false;

}

/*
 * Return the name of the switch found at coordinates (x,y), or 'undefined'
 * if none is found.
 */
function findSwitch(x,y) {
	x = parseInt(parseInt(x) / canvas.scale);
	y = parseInt(parseInt(y) / canvas.scale);

	for (var v in nms.switches_now.switches) {
		if(isIn(nms.switches_now.switches[v]['placement'],x,y)) {
			return v;
		}
	}
	return undefined;
}

/*
 * Set switch color of 'sw' to 'c', then re-draw the switch.
 */
function setSwitchColor(sw, c)
{
	if(!nms.switch_color || !nms.switch_color[sw] || nms.switch_color[sw] != c) {
		nms.switch_color[sw] = c;
		drawSwitch(sw);
	}
}

/*
 * Event handler for the front-end drag bar to change scale
 */
function scaleChange()
{
	var scaler = document.getElementById("scaler").value;
	canvas.scale = scaler;
	setScale();
}

/*
 * Called when a switch is clicked
 */
function switchClick(sw)
{
	if (nms.switch_showing == sw)
		hideSwitch();
	else
		showSwitch(sw);
}

/*
 * Resets the colors of linknets and switches.
 *
 * Useful when mode changes so we don't re-use colors from previous modes
 * due to lack of data or bugs.
 */
function resetColors()
{
	if (!nms.switches_now)
		return;
	if (nms.switches_now.linknets) {
		for (var i in nms.switches_now.linknets) {
			setLinknetColors(i, blue,blue);
		}
	}
	for (var sw in nms.switches_now.switches) {
		setSwitchColor(sw, blue);
	}
}

function resetTextInfo()
{
	if (!nms.switches_now)
		return;
	for (var sw in nms.switches_now.switches) {
		switchInfoText(sw, undefined);
	}

}
/*
 * onclick handler for the canvas.
 *
 * Currently just shows info for a switch.
 */
function canvasClick(e)
{
	var sw = findSwitch(e.pageX - e.target.offsetLeft, e.pageY - e.target.offsetTop);
	if (sw != undefined) {
		switchClick(sw);
	}
}

/*
 * Resize event-handler.
 *
 * Recomputes the scale and applies it.
 *
 * Has to use c.offset* since we are just scaling the canvas, not
 * everything else.
 *
 */
function resizeEvent()
{
	var width = window.innerWidth - dr.bg.c.offsetLeft;
	var height = window.innerHeight - dr.bg.c.offsetTop;
	if (width / (orig.width + margin.x) > height  /  (orig.height + margin.y)) {
		canvas.scale = height / (orig.height + margin.y);
	} else {
		canvas.scale = width / (orig.width + margin.x);
	}
	setScale();
}

/*
 * Draws the background image (scaled).
 */
function drawBG()
{
	if (nms.nightMode) {
		invertCanvas();
	} else {
		var image = document.getElementById('source');
		dr.bg.ctx.drawImage(image, 0, 0, canvas.width, canvas.height);
	}
}

/*
 * Set night mode to whatever 'toggle' is.
 * 
 * XXX: setScale() is a bit of a hack, but it really is the same stuff we
 * need to do: Redraw "everything" (not really).
 */
function setNightMode(toggle) {
	nms.nightMode = toggle;
	var body = document.getElementById("body");
	body.style.background = toggle ? "black" : "white";
	var nav = document.getElementsByTagName("nav")[0];
	if (toggle) {
		dr.blur.c.style.display = '';
		nav.classList.add('navbar-inverse');
	} else {
		dr.blur.c.style.display = 'none';
		nav.classList.remove('navbar-inverse');
	}
	setScale();
}

function switchInfoText(sw, text)
{
	var box = nms.switches_now['switches'][sw]['placement'];
	var c = canvas.scale;
	if (nms.switchInfo[sw] == text && nms.switchInfoDrawn[sw]) {
		return;
	}
	nms.switchInfo[sw] = text;
	nms.switchInfoDrawn[sw] = true;
	dr.textInfo.ctx.clearRect(c* box['x'], c*box['y'], c*box['width'], c*box['height']);
	if (text != undefined && text != "") {
		if ((box['width'] + 10 )< box['height']) {
			drawSideways(dr.textInfo.ctx, text,box['x'],box['y'],box['width'],box['height'],"end");
		} else {
			drawRegular(dr.textInfo.ctx, text,box['x'],box['y'],box['width'],box['height'],"end");
		}
	}
}

/*
 * Draw a box (e.g.: switch).
 */
function drawBox(x,y,boxw,boxh)
{
	var myX = Math.floor(x * canvas.scale);
	var myY = Math.floor(y * canvas.scale);
	var myX2 = Math.floor((boxw) * canvas.scale);
	var myY2 = Math.floor((boxh) * canvas.scale);
	dr.switch.ctx.fillRect(myX,myY, myX2, myY2);
	dr.switch.ctx.lineWidth = Math.floor(1.0 * canvas.scale);
	if (canvas.scale < 1.0) {
		dr.switch.ctx.lineWidth = 1.0;
	}
	dr.switch.ctx.strokeStyle = "#000000";
	dr.switch.ctx.strokeRect(myX,myY, myX2, myY2);
}

/*
 * Draw the blur for a box.
 */
function drawBoxBlur(x,y,boxw,boxh)
{
	var myX = Math.floor(x * canvas.scale);
	var myY = Math.floor(y * canvas.scale);
	var myX2 = Math.floor((boxw) * canvas.scale);
	var myY2 = Math.floor((boxh) * canvas.scale);
	dr.blur.ctx.fillRect(myX,myY, myX2, myY2);
}
/*
 * Draw text on a box - sideways!
 *
 * XXX: This is pretty nasty and should also probably take a box as input.
 */
function drawSideways(ctx,text,x,y,w,h,align)
{
	ctx.rotate(Math.PI * 3 / 2);
	ctx.fillStyle = "white";
	ctx.strokeStyle = "black";
	if (align == "end") {
		ctx.textAlign = align;
		y = y-h + margin.text*2;
	} else {
		ctx.textAlign = "start";
	}
	ctx.lineWidth = Math.floor(nms.fontLineFactor * canvas.scale);
	if (ctx.lineWidth == 0) {
		ctx.lineWidth = Math.round(nms.fontLineFactor * canvas.scale);
	}
	ctx.strokeText(text, - canvas.scale * (y + h - margin.text),canvas.scale * (x + w - margin.text) );
	ctx.fillText(text, - canvas.scale * (y + h - margin.text),canvas.scale * (x + w - margin.text) );

	ctx.rotate(Math.PI / 2);
}

/*
 * Draw background inverted (wooo)
 *
 * XXX: This is broken for chromium on local file system (e.g.: file:///)
 * Seems like a chromium bug?
 */
function invertCanvas() {
	var imageObj = document.getElementById('source');
	dr.bg.ctx.drawImage(imageObj, 0, 0, canvas.width, canvas.height);

	var imageData = dr.bg.ctx.getImageData(0, 0, canvas.width, canvas.height);
	var data = imageData.data;

	for(var i = 0; i < data.length; i += 4) {
		data[i] = 255 - data[i];
		data[i + 1] = 255 - data[i + 1];
		data[i + 2] = 255 - data[i + 2];
	}
	dr.bg.ctx.putImageData(imageData, 0, 0);
}

/*
 * Draw regular text on a box.
 *
 * Should take the same format as drawSideways()
 *
 * XXX: Both should be renamed to have 'text' or something in them
 */
function drawRegular(ctx,text,x,y,w,h,align) {

	ctx.fillStyle = "white";
	ctx.strokeStyle = "black";
	ctx.lineWidth = Math.floor(nms.fontLineFactor * canvas.scale);
	if (align == "end") {
		ctx.textAlign = align;
		x = x+w - margin.text*2;
	} else {
		ctx.textAlign = "start";
	}
	if (ctx.lineWidth == 0) {
		ctx.lineWidth = Math.round(nms.fontLineFactor * canvas.scale);
	}
	ctx.strokeText(text, (x + margin.text) * canvas.scale, (y + h - margin.text) * canvas.scale);
	ctx.fillText(text, (x + margin.text) * canvas.scale, (y + h - margin.text) * canvas.scale);
}

/*
 * Draw a line between switch "insw1" and "insw2", using a gradiant going
 * from color1 to color2.
 *
 * XXX: beginPath() and closePath() is needed to avoid re-using the
 * gradient/color 
 */
function connectSwitches(insw1, insw2,color1, color2) {
	var sw1 = nms.switches_now.switches[insw1].placement;
	var sw2 = nms.switches_now.switches[insw2].placement;
	if (color1 == undefined)
		color1 = blue;
	if (color2 == undefined)
		color2 = blue;
	var x0 = Math.floor((sw1.x + sw1.width/2) * canvas.scale);
	var y0 = Math.floor((sw1.y + sw1.height/2) * canvas.scale);
	var x1 = Math.floor((sw2.x + sw2.width/2) * canvas.scale);
	var y1 = Math.floor((sw2.y + sw2.height/2) * canvas.scale);
	var gradient = dr.link.ctx.createLinearGradient(x1,y1,x0,y0);
	gradient.addColorStop(0, color1);
	gradient.addColorStop(1, color2);
	dr.link.ctx.beginPath();
	dr.link.ctx.strokeStyle = gradient;
	dr.link.ctx.moveTo(x0,y0);
	dr.link.ctx.lineTo(x1,y1); 
	dr.link.ctx.lineWidth = Math.floor(5 * canvas.scale);
	dr.link.ctx.closePath();
	dr.link.ctx.stroke();
	dr.link.ctx.moveTo(0,0);
}

/*
 * Boot up "fully fledged" NMS.
 *
 * If you only want parts of the functionality, then re-implement this
 * (e.g., just add and start the handlers you want, don't worry about
 * drawing, etc).
 */
function initNMS() {
	initDrawing();
	window.addEventListener('resize',resizeEvent,true);
	document.addEventListener('load',resizeEvent,true);
	
	nms.timers.ports = new nmsTimer(updatePorts, 1000, "Port updater", "AJAX request to update port data (traffic, etc)");
	
	nms.timers.ping = new nmsTimer(updatePing, 1000, "Ping updater", "AJAX request to update ping data");
	
	nms.timers.playback = new nmsTimer(nms.playback.tick, 1000, "Playback ticker", "Handler used to advance time");
	
	detectHandler();
	nms.playback.play();
	setupKeyhandler();
	restoreSettings();
}

function detectHandler() {
	var url = document.URL;
	for (var i in handlers) {
		if (('#' + handlers[i].tag) == document.location.hash) {
			setUpdater(handlers[i]);
			return;
		}
	}
	setUpdater(handler_ping);
}

/*
 * Display and populate the dialog box for debugging timers.
 *
 * Could probably be cleaned up.
 */
function showTimerDebug() {
	var tableTop = document.getElementById('debugTimers');
	var table = document.getElementById('timerTable');
	var tr, td1, td2;
	if (table)
		tableTop.removeChild(table);
	table = document.createElement("table");
	table.id = "timerTable";
	table.style.zIndex = 100;
	table.className = "table";
	table.classList.add("table");
	table.classList.add("table-default");
	var header = table.createTHead();
	tr = header.insertRow(0);
	td = tr.insertCell(0);
	td.innerHTML = "Handler";
	td = tr.insertCell(1);
	td.innerHTML = "Interval (ms)";
	td = tr.insertCell(2);
	td.innerHTML = "Name";
	td = tr.insertCell(3);
	td.innerHTML = "Description";
	for (var v in nms.timers) {
		tr = table.insertRow(-1);
		td = tr.insertCell(0);
		td.textContent = nms.timers[v].handle;
		td = tr.insertCell(1);
		td.style.width = "15em";
		var tmp = "<div class=\"input-group\"><input type=\"text\" id='handlerValue" + v + "' value='" + nms.timers[v].interval + "' class=\"form-control\"></input>";
		tmp += "<span class=\"input-group-btn\"><button type=\"button\" class=\"btn btn-default\" onclick=\"nms.timers['" + v + "'].setInterval(document.getElementById('handlerValue" + v + "').value);\">Apply</button></span></div>";
		td.innerHTML = tmp;
		td = tr.insertCell(2);
		td.textContent = nms.timers[v].name;
		td = tr.insertCell(3);
		td.textContent = nms.timers[v].description;
	}
	tableTop.appendChild(table);
	document.getElementById('debugTimers').style.display = 'block'; 
}

function hideLayer(layer) {
	var l = document.getElementById(layer);
	l.style.display = "none";
	if (layer != "layerVisibility")
		nms.layerVisibility[layer] = false;
	saveSettings();
}

function showLayer(layer) {
	var l = document.getElementById(layer);
	l.style.display = "";
	if (layer != "layerVisibility")
		nms.layerVisibility[layer] = true;
	saveSettings();
}

function toggleLayer(layer) {
	var l = document.getElementById(layer);
	if (l.style.display == 'none')
		l.style.display = '';
	else
		l.style.display = 'none';
}

function applyLayerVis()
{
	for (var l in nms.layerVisibility) {
		var layer = document.getElementById(l);
		if (layer)
			layer.style.display = nms.layerVisibility[l] ? '' : 'none';
	}
}

function setMenu()
{
	var nav = document.getElementsByTagName("nav")[0];
	nav.style.display = nms.menuShowing ? '' : 'none';
	resizeEvent();

}
function toggleMenu()
{
	nms.menuShowing = ! nms.menuShowing;
	setMenu();
	saveSettings();
}

function setMapModeFromN(e,key)
{
	switch(key) {
		case '1':
			setUpdater(handler_ping);
			break;
		case '2':
			setUpdater(handler_uplinks);
			break;
		case '3':
			setUpdater(handler_temp);
			break;
		case '4':
			setUpdater(handler_traffic);
			break;
		case '5':
			setUpdater(handler_comment);
			break;
		case '6':
			setUpdater(handler_traffic_tot);
			break;
		case '7':
			setUpdater(handler_disco);
			break;
	}
	return true;
}

function moveTimeFromKey(e,key)
{
	switch(key) {
		case 'h':
			nms.playback.stepTime(-3600);
			break;
		case 'j':
			nms.playback.stepTime(-300);
			break;
		case 'k':
			nms.playback.stepTime(300);
			break;
		case 'l':
			nms.playback.stepTime(3600);
			break;
		case 'p':
			nms.playback.toggle();
			break;
		case 'r':
			nms.playback.setNow();
			nms.playback.play();
			break;
	}
	return true;
}

var debugEvent;
function keyDebug(e)
{
	console.log(e);
	debugEvent = e;
}

function keyPressed(e)
{
	if (e.target.nodeName == "INPUT") {
		return false;
	}
	var key = String.fromCharCode(e.keyCode);
	if (nms.keyBindings[key])
		return nms.keyBindings[key](e,key);
	if (nms.keyBindings['default'])
		return nms.keyBindings['default'](e,key);
	return false;
}

function setupKeyhandler()
{
	var b = document.getElementsByTagName("body")[0];
	b.onkeypress = function(e){keyPressed(e);};
}


function getCookie(cname) {
	var name = cname + "=";
	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);
		if (c.indexOf(name) == 0)
			return c.substring(name.length,c.length);
	}
	return "";
}

function saveSettings()
{
	var foo={};
	for (var v in nms.settingsList) {
		foo[nms.settingsList[v]] = nms[nms.settingsList[v]];
	}
	document.cookie = 'nms='+btoa(JSON.stringify(foo));
}

function restoreSettings()
{
	try {
		var retrieve = JSON.parse(atob(getCookie("nms")));
	} catch(e) { 
		console.log("nothing saved");
	}

	for (var v in retrieve) {
		nms[v] = retrieve[v];
	}
	setScale();
	setMenu();
	setNightMode(nms.nightMode);
	applyLayerVis();
}

function forgetSettings()
{
	document.cookie = 'nms=' + btoa('{}');
}

/*
 * Time travel gui
 */
var datepicker;
function startNowPicker(now) {
  $.datetimepicker.setLocale('no');
  $('#nowPicker').datetimepicker('destroy');
  if(!now && nms.now)
    now = nms.now;
  datepicker = $('#nowPicker').datetimepicker({
    value: now,
    mask:false,
    inline:true,
    todayButton: false,
    validateOnBlur:false,
    dayOfWeekStart:1,
    maxDate:'+1970/01/01',
    onSelectDate: function(ct,$i){
      document.getElementById('nowPicker').dataset.iso = localEpochToString(ct.valueOf()/1000);
    },
    onSelectTime: function(ct,$i){
      document.getElementById('nowPicker').dataset.iso = localEpochToString(ct.valueOf()/1000);
    },
    onGenerate: function(ct,$i){
      document.getElementById('nowPicker').dataset.iso = localEpochToString(ct.valueOf()/1000);
    }
  });
}