/*

* Copyright 2008 Google Inc. 

* Licensed under the Apache License, Version 2.0:

*  http://www.apache.org/licenses/LICENSE-2.0

*/

package com.google.maps.extras.planetary {

	import com.google.maps.Copyright;

	import com.google.maps.CopyrightCollection;

	import com.google.maps.LatLng;

	import com.google.maps.LatLngBounds;

	import com.google.maps.MapType;

	import com.google.maps.MapTypeOptions;

	import com.google.maps.TileLayerBase;

	

	/**

     * Contains all the static Mars map types. To use, import this class and then call on your Map object:

     * addMapType(Moon.ELEVATION_MAP_TYPE);

     * addMapType(Moon.VISIBLE_MAP_TYPE);

     */

	public class Moon {

		

        private static var PLANETARY_MAPS_SERVER:String =  "http://mw1.google.com/mw-planetary/";

        

        private static var MOON_PARAMETERS:Object = {

        "visible" : {

            name: "visible",

            url: PLANETARY_MAPS_SERVER + "lunar/lunarmaps_v1/clem_bw/",

            zoom_levels: 9

        },

        "elevation": {

            name: "elevation",

            url: PLANETARY_MAPS_SERVER + "lunar/lunarmaps_v1/terrain/",

            zoom_levels: 7

        }

        };

        

        private static var MOON_MAP_TYPES:Object = {};

        

        /**

        * This map type displays a shaded terrain map of the surface of the Moon, color-coded by altitude. 

        */

        public static function get ELEVATION_MAP_TYPE():MapType {

        	return getMapType("elevation");

        }

        

        /**

        * This map type displays photographs taken from orbit around the moon.

        */

        public static function get VISIBLE_MAP_TYPE():MapType {

            return getMapType("visible");

        }

        

        private static function getMapType(name:String):MapType {

        	if (!MOON_MAP_TYPES[name]) {

	        	var params:Object = MOON_PARAMETERS[name];

	            var copyright:CopyrightCollection = new CopyrightCollection();

	            copyright.addCopyright(

	                new Copyright(

	                  "moon_" + name,

	                   new LatLngBounds(new LatLng(-180, -90), new LatLng(180,90)), 

	                   0, 

	                   "NASA/USGS"));

	            var layer:MoonTileLayer = new MoonTileLayer(params.url, copyright, params.zoom_levels);

	            var maptype:MapType = new MapType(

	                [layer],  

	                MapType.NORMAL_MAP_TYPE.getProjection(), 

	                name, 

	                new MapTypeOptions({

	                                  radius: 1738000,

	                                  shortName: name,

	                                  alt: "Show " + name + " map"

	                }));

	           MOON_MAP_TYPES[name] = maptype;

            }

            return MOON_MAP_TYPES[name];

        }

    } 

}