var map;
var mgr;
var markerData;
var markers = [];
var searchLatLng;
var searchBox;
var tickedCats;
var hasCategories;

function GoogleMapsSearch(isDefaultSearch)
{
	if (GBrowserIsCompatible())
	{
		var mapContainer = document.getElementById(mapContainerID);
		map = new google.maps.Map2(document.getElementById(mapCanvasID));
		
		map.addControl(new google.maps.ScaleControl());
		map.addControl(new google.maps.SmallMapControl());

		searchBox = document.getElementById(searchBoxID);
		var localSch = new google.search.LocalSearch();
		localSch.setNoHtmlGeneration();
		localSch.setSearchCompleteCallback(this, function() {
		    var resultOK = false;
		    var resultLat = 0;
		    var resultLng = 0;

		    for (i = 0; i < localSch.results.length; i++) {
		        resultLat = localSch.results[i].lat;
		        resultLng = localSch.results[i].lng;

		        // MAKE SURE RESULT IS WITHIN BOUNDS
		        if (resultLat < minLat || resultLat > maxLat) continue;
		        if (resultLng < minLng || resultLng > maxLng) continue;
		        resultOK = true;

		        mapContainer.className = 'gmMapContainerOuterVisible'

		        searchLatLng = new google.maps.LatLng(resultLat, resultLng);
		        map.setCenter(searchLatLng, maxZoom);

		        mgr = new google.maps.MarkerManager(map);
		        if (markers.length == 0 || alwaysRequestMarkers) {
		            var fullUrl = markerUrl;
		            fullUrl += markerUrl.indexOf('?') > -1 ? '&' : '?'
		            fullUrl += 'lat=' + resultLat + '&lng=' + resultLng

		            if (isDefaultSearch) {
		                fullUrl += '&isDefault=1';
		            }

		            GDownloadUrl(fullUrl, ProcessResults);

		            if (isDefaultSearch) {
		                map.setCenter(searchLatLng, 6);
		            }
		            
		        }
		        else {
		            UpdateMap(true);
		        }
		        break;
		    }
		    if (!resultOK) {
		        searchBox.value = '';
		        alert('Sorry, no results found, please enter a valid town or postcode.');
		    }

		});
		localSch.execute(searchBox.value + ",UK");
	}
}

function ProcessResults(markerDataStr, statusCode)
{
	if(statusCode != 200) return;
	markerData = eval('(' + markerDataStr + ')');
	
	var icon;
	if(markerData.icons)
	{
		icon = GetCustomIcon("your-location");
	}
	else
	{
		icon = new google.maps.Icon();
		icon.image = "http://maps.google.co.uk/mapfiles/arrow.png"; 
		icon.shadow = "http://maps.google.co.uk/mapfiles/arrowshadow.png"; 
		icon.iconSize = new google.maps.Size(39, 34); 
		icon.shadowSize = new google.maps.Size(39, 34) ;
		icon.iconAnchor = new google.maps.Point(19, 34); 
	}
	var yourLocMarker = new google.maps.Marker(searchLatLng, {clickable: false, icon: icon, title: 'Your location'});
	mgr.addMarker(yourLocMarker, 0);
	
	var bubbleUrl = markerData.bubble.url;
	bubbleUrl += bubbleUrl.indexOf('?') > -1 ? '&' : '?';
	bubbleUrl += 'slat=' + searchLatLng.lat() + '&slng=' + searchLatLng.lng();
	
	markers = [];
	for(var i=0; i<markerData.markers.length; i++)
	{
		var markerSpec = markerData.markers[i];
		var latLng = new google.maps.LatLng(markerSpec.lat, markerSpec.lng)
		var marker;
		var title = (markerSpec.cat) ? markerSpec.catTitle + ': ' + markerSpec.title : markerSpec.title;
		if(markerData.icons)
		{
			var icon = (markerSpec.cat) ? GetCustomIcon(markerSpec.cat) : GetCustomIcon('marker');
			marker = new google.maps.Marker(latLng, {'icon':icon, 'title':title});
		}
		else
		{
			marker = new google.maps.Marker(latLng, {'title':title});
		}
		var thisBubbleUrl = bubbleUrl + '&mlat=' + latLng.lat() + '&mlng=' + latLng.lng() + '&id=' + markerSpec.id;
		marker.bindInfoWindowHtml('<iframe frameborder=\"0\" width=\"' + markerData.bubble.width + '\" height=\"' + markerData.bubble.height + '\" src=\"' + thisBubbleUrl + '\"></iframe>'); 
		markers.push(marker);
	}
	if(markers.length == 0)
	{
		searchBox.value = '';
		alert('Sorry, no results found for the town or postcode you entered.');
		mgr.refresh();
		return;
	}
	
	UpdateMap(true);
}

function UpdateMap(fullUpdate)
{
	// fullUpdate IS TRUE AFTER A SEARCH AND FALSE AFTER TICKING/UNTICKING A CATEGORY
	
	hasCategories = (catListID != '');
	if(hasCategories)
	{
		tickedCats = [];
		var catListDiv = document.getElementById(catListID);
		for(var i=0; i<catListDiv.childNodes.length; i++)
		{
			var cb = catListDiv.childNodes[i].childNodes[0];
			if(cb.checked) tickedCats.push(cb.value + ': ');
		}
	}

	var lowestDist = 999999;
	var nearLatLng;
	for(var i=0; i<markers.length; i++)
	{
		var markerVisible = !hasCategories;
		var marker = markers[i];
		if(hasCategories)
		{
			for(var j=0; j<tickedCats.length; j++)
			{
				var title = marker.getTitle();
				var cat = tickedCats[j];
				if(title.indexOf(cat) == 0)
				{
					if(!fullUpdate) marker.show();
					markerVisible = true;
					break;
				}
			}
			if(!markerVisible && !fullUpdate) marker.hide();
		}
		
		if(markerVisible && fullUpdate)
		{
			var markerLatLng = marker.getLatLng();
			var dist = markerLatLng.distanceFrom(searchLatLng);
			if(dist < lowestDist)
			{
				lowestDist = dist;
				nearLatLng = markerLatLng;	
			}
		}
	}
	
	if(fullUpdate)
	{
		if(nearLatLng)
		{
			var bounds = new google.maps.LatLngBounds(); 
			bounds.extend(searchLatLng); 
			bounds.extend(nearLatLng);
			map.setCenter(bounds.getCenter());
			var zoomLevel = map.getBoundsZoomLevel(bounds);
			if(zoomLevel > maxZoom) zoomLevel = maxZoom;
			map.setZoom(zoomLevel);
		}
			
		mgr.addMarkers(markers, 0);
		mgr.refresh();
	}
	if(hasCategories && fullUpdate)
	{
		// REDO UpdateMap TO REMOVE UNWANTED MARKERS
		UpdateMap(false);
	}
}

function GoogleMapsReset(mapContainerID)
{
	var mapContainer = document.getElementById(mapContainerID);
	mapContainer.className = 'gmMapContainerOuterHidden'
}

function GetCustomIcon(name)
{
	var icon = new google.maps.Icon();
	icon.image = markerData.icons.src + name + '.png';
	icon.shadow = markerData.icons.src + 'shadow.png';
	icon.transparent = markerData.icons.src + 'transparent.png';
	icon.iconSize = markerData.icons.iconSize;
	icon.shadowSize = markerData.icons.shadowSize;
	icon.iconAnchor = markerData.icons.iconAnchor;
	icon.infoWindowAnchor = markerData.icons.infoWindowAnchor;
	return icon;
}

$(document).ready(function() {
    if (defaultSearchLocation) {
        var sb = $('#' + searchBoxID);
        sb.val(defaultSearchLocation);
        GoogleMapsSearch(true);
        sb.val('');        
    }
});