var map = null;
var geocoder = null;

function centerInItaly() 
{
    if (GBrowserIsCompatible()) 
    { 
        map = new GMap2(document.getElementById("map_canvas"));
        map.setCenter(new GLatLng(42.4500, 11.1000), 5);
		map.addControl(new GLargeMapControl());
   		map.addControl(new GMapTypeControl());
    	map.addControl(new google.maps.LocalSearch(), new GControlPosition(G_ANCHOR_BOTTOM_RIGHT, new GSize(10,20)))
    }
}

function setAddressOnMap(address) 
{
  if (GBrowserIsCompatible()) 
  {
    map = new GMap2(document.getElementById("map_canvas"));
	
    geocoder = new GClientGeocoder();
    geocoder.getLatLng(
	    address,
	    function(point) {
		    if (point)
		    {
			    map.setCenter(point, 14);
			    var marker = new GMarker(point);
			    map.addOverlay(marker);
		    }
		    else
		    {	
			    map.setCenter(new GLatLng(42.4500, 11.1000), 5);
			    alert("Impossibile visualizzare l'indirizzo sulla mappa");
		    }
	    }
    )
	
    map.addControl(new GLargeMapControl());
    map.addControl(new GMapTypeControl());
    map.addControl(new google.maps.LocalSearch(), new GControlPosition(G_ANCHOR_BOTTOM_RIGHT, new GSize(10,20)));
  }
}

function calculateTrack(from, to) 
{
    if (GBrowserIsCompatible()) 
    {      
	    map = new GMap2(document.getElementById("map_canvas"));
	    map.addControl(new GLargeMapControl());
	    map.addControl(new GMapTypeControl());
	    map.addControl(new google.maps.LocalSearch(), new GControlPosition(G_ANCHOR_BOTTOM_RIGHT, new GSize(10,20)));
	    
	    gdir = new GDirections(map, document.getElementById("directions"));
	    GEvent.addListener(gdir, "error", handleErrors);
		
		geocoder = new GClientGeocoder();
		
		//geocoding from
		geocoder.getLatLng(
		    from,
		    function(pointFrom) {
			    if (pointFrom)
			    {
					//geocoding to
					geocoder.getLatLng(
					    to,
					    function(pointTo) {
						    if (pointTo)
						    {
								points = new Array(pointFrom, pointTo);
								gdir.loadFromWaypoints(points, { "locale": "it" });
						    }
						    else
						    {	
							    map.setCenter(new GLatLng(42.4500, 11.1000), 5);
							    alert("Impossibile elaborare il percorso desiderato");
							    return;
						    }
					    }
					);
			    }
			    else
			    {	
				    map.setCenter(new GLatLng(42.4500, 11.1000), 5);
				    alert("Impossibile elaborare il percorso desiderato");
				    return;
			    }
		    }		    
		);
    }
}

function handleErrors()
{	  
    map.setCenter(new GLatLng(42.4500, 11.1000), 5);
    if (gdir.getStatus().code == G_GEO_UNKNOWN_ADDRESS)
        alert("L'indirizzo specificato non è stato trovato");
    else
        alert("Impossibile elaborare il percorso desiderato");
    
	/*
	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.");
	*/
}