var map = null;
var previousMarker = null;
var addedMarker = null;

var bsPoints1 = [];
var bsPoints2 = [];
var bsPoints3 = [];
var mm;

//init icons
var imgMarker = '/noRW_layout/googlemaps/icons/marker.png';
//var imgMarkerShadow = 'http://labs.google.com/ridefinder/images/mm_20_shadow.png';
var imgMarkerPevneMisto = '/noRW_layout/googlemaps/icons/icon1.png';
var imgMarkerAkce = '/noRW_layout/googlemaps/icons/icon2.png';
var imgMarkerVlak = '/noRW_layout/googlemaps/icons/icon3.png';

var iconPevneMisto = new GIcon();
iconPevneMisto.image = imgMarkerPevneMisto;
//iconPevneMisto.shadow = imgMarkerShadow;
iconPevneMisto.iconSize = new GSize(28, 33);
//iconPevneMisto.shadowSize = new GSize(22, 20);
iconPevneMisto.iconAnchor = new GPoint(14, 33);
iconPevneMisto.infoWindowAnchor = new GPoint(14, 33);
iconAkce = new GIcon(iconPevneMisto, imgMarkerAkce);
iconVlak = new GIcon(iconPevneMisto, imgMarkerVlak);

GMarker.prototype.hide = function ()
{
  if (this.getPoint().lat() < 90) {
    try {
      this.savePoint = this.getPoint();
      this.setPoint(new GLatLng(90, 0));
    } catch(e) {}
  }  
}

GMarker.prototype.show = function ()
{
  if (this.getPoint().lat() == 90) {
    if (this.savePoint) {
      try {
        this.setPoint(this.savePoint);
        this.savePoint = null;
      } catch(e) {}
    }  
  }    
}

function createMarker(point, label, html, icontype) {
	
	//icon
	var icon;
	switch(icontype) {
		case "1":
			icon = iconPevneMisto;
			break;
		case "2":
			icon = iconAkce;
			break;
		case "3":
			icon = iconVlak;
			break;
		default:
			icon = iconPevneMisto;
			break;
	}
	
	var marker = new GMarker(point, {icon:icon, title:label});
	GEvent.addListener(marker, "click", function() {
		marker.openInfoWindowHtml(html);
	});
	return marker;
}

function gmaps() {
	if (GBrowserIsCompatible()) {
		map = new GMap2(document.getElementById('map'));

		//init coordinates
		if ((lastCoords == undefined) || (lastCoords == "")) {
			map.setCenter(new GLatLng(49.868939,15.300608), 7);
		} else {
			var p = lastCoords.split(",");
			map.setCenter(new GLatLng(p[0], p[1]), 15);
			if (coordsAdded) {
				var markerAdded = createMarker(new GLatLng(p[0], p[1]), addedCaption, addedHtml, addedType);
				map.addOverlay(markerAdded);
			} else {
				markerToMap(new GLatLng(p[0], p[1]));
			}
		}

		//init map
		map.addControl(new GOverviewMapControl(new GSize(90, 90)));
		map.addControl(new GMapTypeControl(1));
		map.addControl(new GLargeMapControl());

		if (!bsAddPoint) {
			  // Read the data from example.xml
		      GDownloadUrl("/noRW_layout/betlemske_svetlo/jspointsdata.xml?1265560605", function(doc) {
		        var xmlDoc = GXml.parse(doc);
		        var markers = xmlDoc.documentElement.getElementsByTagName("marker");
		        //window.alert(markers.length);
		        var markersDest;
		        
		        for (var i = 0; i < markers.length; i++) {
		        	// obtain the attribues of each marker
					var lat = parseFloat(markers[i].getAttribute("lat"));
					var lng = parseFloat(markers[i].getAttribute("lng"));
					var point = new GLatLng(lat,lng);
					var html = GXml.value(markers[i].getElementsByTagName("infowindow")[0]);
					var label = markers[i].getAttribute("label");
					var type = markers[i].getAttribute("type");
					
					// create the marker
					var marker = createMarker(point, label, html, type);
					markersDest = getMarkersArrayByType(type);
					markersDest.push(marker);
		        }
				mm = new GMarkerManager(map, {
					borderPadding :1
				});
				mm.addMarkers(bsPoints1, 6, 17);
				mm.addMarkers(bsPoints2, 6, 17);
				mm.addMarkers(bsPoints3, 6, 17);
				mm.refresh();
		      });
		}
	}

	// ====== Restricting the range of Zoom Levels =====
	// Get the list of map types
	var mt = map.getMapTypes();
	// Overwrite the getMinimumResolution() and getMaximumResolution() methods
	for ( var i = 0; i < mt.length; i++) {
		mt[i].getMinimumResolution = function() {
			return 6;
		}
	}

	// pro pridani bodu
	if (bsAddPoint) {
		if (!coordsAdded) {
			var mouseClick = GEvent.addListener(map, 'click', function(overlay, latlng) {
				if (latlng) {
					markerToMap(latlng);
				}
			});
		}
	}
}

function markerToMap(latlng) {
	if (previousMarker != null) {
		map.removeOverlay(previousMarker);
	}
	var marker = new GMarker(latlng, {
		draggable :true,
		autoPan :false
	});
	map.addOverlay(marker);
	marker.setImage(imgMarker);
	previousMarker = marker;
	document.getElementById('edtGPScoord').setAttribute("value",
			marker.getPoint().toUrlValue());

	GEvent.addListener(marker, 'dragend', function() {
		document.getElementById('edtGPScoord').setAttribute(
				"value", marker.getPoint().toUrlValue());
	});
}

function getLocation() {
	var search = document.getElementById('search').value;
	if (search == "") {
		window.alert("Zadejte prosím místo k hledání.");
		return false;
	}
	search = search + ", czech republic";
	var geo = new GClientGeocoder();

	geo.getLocations(search, function(result) {
		if (result.Status.code == G_GEO_SUCCESS) {
			map.clearOverlays();
			var p = result.Placemark[0].Point.coordinates;
			place(p[1], p[0]);
		} else if (result.Status.code == G_GEO_UNKNOWN_ADDRESS) {
			window.alert("Adresa nenalezena, zkuste to prosím znovu.");
		}
	});

	return false;
}

function place(lat, lng) {
	var point = new GLatLng(lat, lng);
	map.setCenter(point, 14);
	// map.addOverlay(new GMarker(point));
}

// == shows all markers of a particular category, and ensures the checkbox is checked ==
function showMarkers(type) {
  var markers = getMarkersArrayByType(type);
  for (var i=0; i<markers.length; i++) {
	  markers[i].show();
  }
  // == check the checkbox ==
  document.getElementById("boxMarkers"+type).checked = true;
}

// == hides all markers of a particular category, and ensures the checkbox is cleared ==
function hideMarkers(type) {
  var markers = getMarkersArrayByType(type);
  for (var i=0; i<markers.length; i++) {
    	markers[i].hide();
  }
  // == clear the checkbox ==
  document.getElementById("boxMarkers"+type).checked = false;
  // == close the info window, in case its open on a marker that we just hid
  map.closeInfoWindow();
}

var boxchecked = [1, 1, 1, 1]; // prepinace

// == a checkbox has been clicked ==
function boxclick(box, type) {
  if (boxchecked[type] == 0) {
    showMarkers(type);
    boxchecked[type] = 1;
  } else {
    hideMarkers(type);
    boxchecked[type] = 0;
  }
  //mm.refresh();
}

function getMarkersArrayByType(type) {
	switch(type) {
		case "1":
			return bsPoints1;
			break;
		case "2":
			return bsPoints2;
			break;
		case "3":
			return bsPoints3;
			break;
		default:
			return bsPoints1;
			break;
	}	
}