var map;
var geocoder;

function load(){
if (GBrowserIsCompatible()) {
geocoder = new GClientGeocoder();
map = new GMap2(document.getElementById('map'));
map.addControl(new GLargeMapControl());
map.setCenter(new GLatLng(54.622978,-4.3), 5);
}
}

function searchLocations(){
var address = document.getElementById('addressInput').value + ", UK";
geocoder.getLatLng(address, function(latlng) {
if (!latlng) {
alert(address + ' not found');
} else {
searchLocationsNear(latlng);
}
});
}

function searchLocationsNear(center){
var searchUrl = '../xml-theory.php?lat=' + center.lat() + '&lng=' + center.lng() + '&radius=500';
GDownloadUrl(searchUrl, function(data) {
var xml = GXml.parse(data);
var markers = xml.documentElement.getElementsByTagName('marker');
map.clearOverlays();

var sidebar = document.getElementById('sidebar');
sidebar.innerHTML = '';
if (markers.length == 0) {
sidebar.innerHTML = '<div class="center"><p><strong>No results found. Please try entering more detail<br /> or give a different town or postcode</strong><br /></p></div>';
map.setCenter(new GLatLng(54.622978,-4.3), 5);
return;
}

var bounds = new GLatLngBounds();
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 distance = parseFloat(markers[i].getAttribute('distance'));
var point = new GLatLng(parseFloat(markers[i].getAttribute('lat')),
parseFloat(markers[i].getAttribute('lng')));

var marker = createMarker(point, name, address, type);
map.addOverlay(marker);
var sidebarEntry = createSidebarEntry(marker, name, address, distance);
sidebar.appendChild(sidebarEntry);
bounds.extend(point);
}
map.setCenter(bounds.getCenter(), (map.getBoundsZoomLevel(bounds) -1));
});
}

function createMarker(point, name, address, type){
var marker = new GMarker(point, customIcons[type]);
var html = '<strong>' + name + '</strong> <br />' + address + '<br /><br />';
GEvent.addListener(marker, 'click', function() {
marker.openInfoWindowHtml(html);
});
return marker;
}

var icontheory = new GIcon(); 
icontheory.image = '../images/icons/theorytest.png';
icontheory.iconSize = new GSize(20, 34);
icontheory.iconAnchor = new GPoint(20, 34);
icontheory.infoWindowAnchor = new GPoint(10, 17);

var customIcons = [];
customIcons["theory"] = icontheory;

function createSidebarEntry(marker, name, address, distance){
var div = document.createElement('div');
var html = '<p><strong>' + name + '</strong> (' + distance.toFixed(1) + ' miles)<br />' + address + '<br /></p>';
div.innerHTML = html;
div.style.cursor = 'pointer';
div.style.marginBottom = '5px'; 
GEvent.addDomListener(div, 'click', function(){GEvent.trigger(marker, 'click');});
GEvent.addDomListener(div, 'mouseover', function(){div.style.backgroundColor = '#eee';});
GEvent.addDomListener(div, 'mouseout', function(){div.style.backgroundColor = '#fff';});
return div;
}