var maps = {};

jQuery(document).ready( function($){
	if( $('.em-location-map').length > 0 || $('.em-locations-map').length > 0 ){
		var script = document.createElement("script");
		script.setAttribute("src", "http://maps.google.com/maps/api/js?sensor=false&callback=em_maps");
		script.setAttribute("type", "text/javascript");
		document.documentElement.firstChild.appendChild(script);
	}
});

//Load single maps (each map is treated as a seperate map.
function em_maps() {
	//Find all the maps on this page
	jQuery('.em-location-map').each( function(index){
		el = jQuery(this);
		var map_id = el.attr('id').replace('em-location-map-','');
		em_LatLng = new google.maps.LatLng( jQuery('#em-location-map-coords-'+map_id+' .lat').text(), jQuery('#em-location-map-coords-'+map_id+' .lng').text());
		maps[map_id] = new google.maps.Map( document.getElementById('em-location-map-'+map_id), {
		    zoom: 14,
		    center: em_LatLng,
		    mapTypeId: google.maps.MapTypeId.ROADMAP,
		    mapTypeControl: false
		});
		var marker = new google.maps.Marker({
		    position: em_LatLng,
		    map: maps[map_id]
		});
		var infowindow = new google.maps.InfoWindow({ content: document.getElementById('em-location-map-info-'+map_id).firstElementChild });
		infowindow.open(maps[map_id],marker);
	});
	jQuery('.em-locations-map').each( function(index){
		var el = jQuery(this);
		var map_id = el.attr('id').replace('em-locations-map-','');
		var em_data = jQuery.parseJSON( jQuery('#em-locations-map-coords-'+map_id).text() );
		jQuery.getJSON(document.URL, em_data , function(data){
			if(data.length > 0){
				  var myLatlng = new google.maps.LatLng(data[0].location_latitude,data[0].location_longitude);
				  var myOptions = {
				    mapTypeId: google.maps.MapTypeId.ROADMAP
				  };
				  maps[map_id] = new google.maps.Map(document.getElementById("em-locations-map-"+map_id), myOptions);
				  
				  var minLatLngArr = [0,0];
				  var maxLatLngArr = [0,0];
				  
				  for (var i = 0; i < data.length; i++) {
					  if( !(data[i].location_latitude == 0 && data[i].location_longitude == 0) ){
						var latitude = parseFloat( data[i].location_latitude );
						var longitude = parseFloat( data[i].location_longitude );
						var location = new google.maps.LatLng( latitude, longitude );
						var marker = new google.maps.Marker({
						    position: location, 
						    map: maps[map_id]
						});
						marker.setTitle(data[i].location_name);
						var myContent = '<div class="em-map-balloon"><div id="em-map-balloon-'+map_id+'" class="em-map-balloon-content">'+ data[i].location_balloon +'</div></div>';
						em_map_infobox(marker, myContent, maps[map_id]);
						
						//Get min and max long/lats
						minLatLngArr[0] = (latitude < minLatLngArr[0] || i == 0) ? latitude : minLatLngArr[0];
						minLatLngArr[1] = (longitude < minLatLngArr[1] || i == 0) ? longitude : minLatLngArr[1];
						maxLatLngArr[0] = (latitude > maxLatLngArr[0] || i == 0) ? latitude : maxLatLngArr[0];
						maxLatLngArr[1] = (longitude > maxLatLngArr[1] || i == 0) ? longitude : maxLatLngArr[1];
					  }
				  }
				  // Zoom in to the bounds
				  var minLatLng = new google.maps.LatLng(minLatLngArr[0],minLatLngArr[1]);
				  var maxLatLng = new google.maps.LatLng(maxLatLngArr[0],maxLatLngArr[1]);
				  var bounds = new google.maps.LatLngBounds(minLatLng,maxLatLng);
				  maps[map_id].fitBounds(bounds);
			}else{
				el.children().first().html('No locations found');
			}
		});
	});
}
 
// The five markers show a secret message when clicked
// but that message is not within the marker's instance data
 
function em_map_infobox(marker, message, map) {
  var infowindow = new google.maps.InfoWindow({ content: message });
  google.maps.event.addListener(marker, 'click', function() {
    infowindow.open(map,marker);
  });
}