var map;
var localSearch = new GlocalSearch();
var locations = {};
var lat;
var lng;
          
var icon = new GIcon();
icon.image = "http://www.google.com/mapfiles/marker.png";
icon.shadow = "http://www.google.com/mapfiles/shadow50.png";
icon.iconSize = new GSize(20, 34);
icon.shadowSize = new GSize(37, 34);
icon.iconAnchor = new GPoint(10, 34);

function hideloading()
{
	document.getElementById('prepage').style.visibility='hidden';
}


function maploading()
{ //DOM
 if (document.getElementById)
 {
  //document.getElementById('map').style.visibility='hidden';
  document.getElementById('prepage').style.visibility='visible';
 }
 else
 {
  if (document.layers)
  { //NS4
   //document.map.visibility = 'hidden';
   document.prepage.visibility = 'visible';
  }
  else
  { //IE4
   //document.all.map.style.visibility = 'hidden';
   document.all.prepage.style.visibility = 'visible';
  }
 }
}

function maploaded()
{ //DOM
 if (document.getElementById)
 {
  document.getElementById('prepage').style.visibility='hidden';
  document.getElementById('map').style.visibility='visible';
 }
 else
 {
  if (document.layers)
  { //NS4
   document.prepage.visibility = 'hidden';
   document.map.visibility = 'visible';
 
  }
  else
  { //IE4
   document.all.prepage.style.visibility = 'hidden';
   document.all.map.style.visibility = 'visible';
  }
 }
 
}


function usePointFromPostcode(postcode, callbackFunction) {
	maploading();
		
	localSearch.setSearchCompleteCallback(null, 
		function() {
			
			if (localSearch.results[0])
			{		
				var resultLat = localSearch.results[0].lat;
				var resultLng = localSearch.results[0].lng;
				var point = new GLatLng(resultLat,resultLng);
				lat = point.lat();
				lng = point.lng();
				callbackFunction(point);
			}else{
				alert("Postcode not found!");
			}
		});	
	
	postcode = postcode.replace("'","");	
	postcode = postcode.replace("<","");	
	postcode = postcode.replace("%","");	
	postcode = postcode.replace(";","");	
	postcode = postcode.replace(":","");	
	if (postcode != '')		
	{
		localSearch.execute(postcode + ", UK");
	}
}

function showMarkers()
{
		GDownloadUrl("marker.xml", function(data) {
        var xml = GXml.parse(data);
        var markers = xml.documentElement.getElementsByTagName("marker");
        for (var i = 0; i < markers.length; i++) {
          var name = markers[i].getAttribute("name");
          var address = markers[i].getAttribute("address");
          var type = markers[i].getAttribute("type");
		  
		  var latlng = new GLatLng(parseFloat(markers[i].getAttribute("lat")),
                                  parseFloat(markers[i].getAttribute("lng")));
		  
		  var store = {latlng: latlng, name: name, address: address, type: type};
          var latlngHash = (latlng.lat().toFixed(6) + "" + latlng.lng().toFixed(6));
          latlngHash = latlngHash.replace(".","").replace(".", "").replace("-","");
          if (locations[latlngHash] == null) {
            locations[latlngHash] = []
          }
          locations[latlngHash].push(store);
        }
        for (var latlngHash in locations) {
          var stores = locations[latlngHash];
          if (stores.length > 1) {
            //map.addOverlay(createClusteredMarker(stores));
          } else {
            map.addOverlay(createMarker(stores));
          }
         }
		 maploaded();
      });
}

function placeMarkerAtPoint(point)
{
	//var marker = new GMarker(point,icon);
	//map.addOverlay(marker);
	//showMarkers();
}

function setCenterToPoint(point)
{
	var marker = new GMarker(point,icon);
	map.addOverlay(marker);
	
	map.setCenter(point, 10);
	showMarkers();
}

function showPointLatLng(point)
{
	alert("Latitude: " + point.lat() + "\nLongitude: " + point.lng());
}
function getPointLat(point)
{
	//return point.lat();
}
function getPointLng(point)
{
	//return point.lng();
}

function mapLoad() {
	hideloading();
	if (GBrowserIsCompatible()) {
		map = new GMap2(document.getElementById("map"));
		
		map.addControl(new GLargeMapControl());
		map.addControl(new GMapTypeControl());
		map.setCenter(new GLatLng(54.622978,-2.592773), 5, G_NORMAL_MAP);
	}
}

function createMarker(stores) {
      var store = stores[0];
      var newIcon = MapIconMaker.createMarkerIcon({width: 32, height: 32, primaryColor: "#00ff00"});
      var marker = new GMarker(store.latlng, {icon: newIcon});
      var html = "<b>" + store.name + "</b> <br/>" + store.address;
      GEvent.addListener(marker, 'click', function() {
        marker.openInfoWindowHtml(html);
      });
	  return marker;
    }
 
    function createClusteredMarker(stores) {
      var newIcon = MapIconMaker.createMarkerIcon({width: 44, height: 44, primaryColor: "#00ff00"});
      var marker = new GMarker(stores[0].latlng, {icon: newIcon});
      var html = "";
      for (var i = 0; i < stores.length; i++) {
        html += "<b>" + stores[i].name + "</b> <br/>" + stores[i].address + "<br/>";
      }
      GEvent.addListener(marker, 'click', function() {
        marker.openInfoWindowHtml(html);
      });
      return marker;
    }
	
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function addUnLoadEvent(func) {
	var oldonunload = window.onunload;
	if (typeof window.onunload != 'function') {
	  window.onunload = func;
	} else {
	  window.onunload = function() {
	    oldonunload();
	    func();
	  }
	}
}

addLoadEvent(mapLoad);
addUnLoadEvent(GUnload);