// JavaScript Document
var map;
var localSearch = new GlocalSearch();

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 usePointFromPostcode(postcode, callbackFunction) {
	
	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);
				callbackFunction(point);
			}else{
				alert("Postcode not found!");
			}
		});	
		
	localSearch.execute(postcode + ", UK");
}

function placeMarkerAtPoint(point)
{
	var marker = new GMarker(point,icon);
	map.addOverlay(marker);
	map.setCenter(point, 15);
	//alert(map.getZoom());
}

function setCenterToPoint(point)
{
	map.setCenter(point, 15);
}

function setZoom(value)
{
	map.setCenter(point, value);
}
function showPointLatLng(point)
{
	alert(point.lat() + "," + point.lng());
}

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

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();
	  }
	}
}
function getPost() {
	var p = 'RH109RD';
	if (!p) {
		p = 'RH109RD';
	}
	usePointFromPostcode(p, placeMarkerAtPoint);	
}

function getDistance(lat1, lon1, lat2, lon2,alteration) {
  var R = 6371; // earth's mean radius in km
  var dLat = toRad((lat2-lat1));
  var dLon = toRad((lon2-lon1));
  lat1 = toRad(lat1), lat2 = toRad(lat2);

  var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
          Math.cos(lat1) * Math.cos(lat2) * 
          Math.sin(dLon/2) * Math.sin(dLon/2);
  var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
  var d = R * c;
  return (Math.round(k2m(d))) + alteration; //Math.round(original*100)/100 //returns 28.45 add approx value of 9
}

function toRad(val) {  // convert degrees to radians
  return val * Math.PI / 180;
}
function k2m(val) {
	var km = parseFloat(val);
	var mi = "";
	if (!isNaN(km)) mi = km * 0.621371192;
		return mi;
}

function gd(ar) {

var arr = ar.split('|');
var stationID = arr[0];
var longditude = arr[2];
var lattitude = arr[1];
document.getElementById('rentStationDistance').value = getDistance(lattitude,longditude,document.getElementById('propLattitude').value,document.getElementById('propLongditude').value,0);
}

addLoadEvent(mapLoad);
addLoadEvent(getPost);
addUnLoadEvent(GUnload);