var firstMap = true;
    var map;
    var gdir;
    var geocoder = null;
    var addressMarker;

	$(document).ready(function() {
		
		initialize();
		
		$("#update-map").click(function() { 
			$("#directions").html('');
			initialize();
			return false;
		});		
		
		$("input[name='fromRadio']").change(function() {			
			$("#fromInput").val('');
		});
		
		$("#search-again").click(function() { 
			$("#cant-find-it").hide();
			$("#search-again-container").hide();
			$("#directions").fadeOut(300);
			$("#locations-form").fadeIn(300);			
		});
	});
	
    function initialize() {
      if (GBrowserIsCompatible()) {      
        if(document.getElementById("map_canvas")) { map = new GMap2(document.getElementById("map_canvas")); map.setUIToDefault(); }
        if(document.getElementById("directions")) { gdir = new GDirections(map, document.getElementById("directions")); }
        GEvent.addListener(gdir, "addoverlay", onGDirectionsLoad);
        GEvent.addListener(gdir, "error", handleErrors);
		 
 		if (firstMap){ // initial page load /*$("#fromInput").val().length*/
			
			setDirections("Sinnathamby Boulevard, QLD 4300", "Brisbane City, QLD, Australia", "en_GB");

		} else {

			var userEnteredText = true;

			var from = $("#fromInput").val(); // this is the from field used by google
			if(!from.length)
			{
				from = $("input[name='fromRadio']:checked").val();
				userEnteredText = false;
			} // if text input is not empty, make it that rather than the checkbox

			var to = $("input[name='toRadio']:checked").val(); // this is the to value used by google
									
			setDirections(from, to, "en_GB");

			if(userEnteredText)
			{
				from = $("#fromInput").val();
			}
			else
			{
				from = $("input[name='fromRadio']:checked").attr('id'); // this is the from value to be saved using MeTTro forms
			}		
			
			to = $("input[name='toRadio']:checked").attr('id'); // this is the to value to be saved using MeTTro forms
		
			// these change the value of the hidden MeTTro form to the selected radio buttons
			$("#from_address").val(from);
			$("#to_address").val(to);
			
			$("#locations-form").fadeOut(300, function() {
				$("#directions").fadeIn(300);
				$("#search-again-container").fadeIn(300);
			});

		} 
      }
    }
    
    function setDirections(fromAddress, toAddress, locale) {
      gdir.load("from: " + fromAddress + " to: " + toAddress,
                { "locale": locale });
    }	
 
    function handleErrors(){
		
		$("#search-again-container").hide();
		$("#directions").hide();
		$("#locations-form").show();	
		
		$("#cant-find-it").fadeIn(500);
		/*
		if (gdir.getStatus().code == G_GEO_UNKNOWN_ADDRESS)
		 alert("No corresponding geographic location could be found for one of the specified addresses. This may be due to the fact that the address is relatively new, or it may be incorrect.\nError code: " + gdir.getStatus().code);
		else if (gdir.getStatus().code == G_GEO_SERVER_ERROR)
		 alert("A geocoding or directions request could not be successfully processed, yet the exact reason for the failure is not known.\n Error code: " + gdir.getStatus().code);
		else if (gdir.getStatus().code == G_GEO_MISSING_QUERY)
		 alert("The HTTP q parameter was either missing or had no value. For geocoder requests, this means that an empty address was specified as input. For directions requests, this means that no query was specified in the input.\n Error code: " + gdir.getStatus().code);
		else if (gdir.getStatus().code == G_GEO_BAD_KEY)
		 alert("The given key is either invalid or does not match the domain for which it was given. \n Error code: " + gdir.getStatus().code);
		else if (gdir.getStatus().code == G_GEO_BAD_REQUEST)
		 alert("A directions request could not be successfully parsed.\n Error code: " + gdir.getStatus().code);
		else alert("An unknown error occurred.");
		*/
    }
 
	function onGDirectionsLoad(){ 
	
	if(!firstMap) { // don't submit locations to mettro forms if it's the first page load.
		submitForm(window.document.frmgooglemapsubmissionform); // submit mettro forms
	}

	firstMap = false;

	
	var poly = gdir.getPolyline();
	if (poly.getVertexCount() > 1000) {
		alert("This route has too many vertices");
		return;
	}
	
	var baseUrl = "http://maps.google.com/staticmap?";
 
	var params = [];
	var markersArray = [];
	markersArray.push(poly.getVertex(0).toUrlValue(5) + ",greena");
	markersArray.push(poly.getVertex(poly.getVertexCount()-1).toUrlValue(5) + ",greenb");
	params.push("markers=" + markersArray.join("|"));
	
	var polyParams = "rgba:0x0000FF80,weight:5|";
	var polyLatLngs = [];
	for (var j = 0; j < poly.getVertexCount(); j++) {
	 polyLatLngs.push(poly.getVertex(j).lat().toFixed(5) + "," + poly.getVertex(j).lng().toFixed(5));
	}
	params.push("path=" + polyParams + polyLatLngs.join("|"));
	params.push("size=300x300");
	params.push("key=ABQIAAAAjU0EJWnWPMv7oQ-jjS7dYxSPW5CJgpdgO_s4yyMovOaVh_KvvhSfpvagV18eOyDWu7VytS6Bi1CWxw");
	
	baseUrl += params.join("&");
	
	var extraParams = [];
	extraParams.push("center=" + map.getCenter().lat().toFixed(6) + "," + map.getCenter().lng().toFixed(6));
	extraParams.push("zoom=" + map.getZoom());
	addImg(baseUrl + "&" + extraParams.join("&"), "staticMapOverviewIMG");
	
	var extraParams = [];
	extraParams.push("center=" + poly.getVertex(0).toUrlValue(5));
	extraParams.push("zoom=" + 15);
	addImg(baseUrl + "&" + extraParams.join("&"), "staticMapStartIMG");
	
	var extraParams = [];
	extraParams.push("center=" + poly.getVertex(poly.getVertexCount()-1).toUrlValue(5));
	extraParams.push("zoom=" + 15);
	addImg(baseUrl + "&" + extraParams.join("&"), "staticMapEndIMG");
}


function addImg(url, id) {
	var img = document.createElement("img");
	img.src = url;
	if(document.getElementById(id)) { 
		document.getElementById(id).innerHTML = ""; 
		document.getElementById(id).appendChild(img);
	}
}		
/*
	function getQueryVariable(variable) {
	  var query = window.location.search.substring(1);
	  var vars = query.split("&");
	  for (var i=0;i<vars.length;i++) {
		var pair = vars[i].split("=");
		if (pair[0] == variable) {
		  return pair[1];
		}
	  } 
	}	
*/