/**
 *
 * @project     Project Porchlight
 * @revision    $Id:  $
 * @purpose     Project Porchlight OpenLayers customization
 * @author      Julien-Samuel Lacroix (jlacroix@mapgears.com)
 * @copyright
 * <b>Copyright (c) 2007 Mapgears Inc.</b>
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */


// Function to extract the URL variables
szBaseURL = '/mapping/';
var aszURL = Array();
function getURLVar()
{
    var szURL = unescape(window.document.location);
    if(szURL.indexOf('?') <= 0)
        return true;

    szURL = szURL.substr(szURL.indexOf('?')+1);
    var aszURLParts = szURL.split('&');
    for(var i=0; i<aszURLParts.length; i++)
    {
        var aszValues = aszURLParts[i].split('=');
        aszURL[aszValues[0]] = aszValues[1];
    }

    return true;
}
var map;
function init(){
    // Set the max extent from the URL
    var maxExtent = '';
    var nCenterLon = 0;
    var nCenterLat = 0;
    var nZoomLevel = 13;
    aszURL['bbox'] = '-115.17513275146484,53.022026062011719,-114.77513885498047,53.422023773193359';aszURL['city'] = '274';
    getURLVar();
    if(aszURL['bbox'] && aszURL['city'])
    {
        var aszBBox = aszURL['bbox'].split(',');
        if(aszBBox.length < 4)
        {
            alert("Invalid BBox");
            return true;
        }

        maxExtent = new OpenLayers.Bounds(aszBBox[0], aszBBox[1], 
                                          aszBBox[2], aszBBox[3]);
        nCenterLon = Number(aszBBox[0]) + 
            ((Number(aszBBox[2]) - Number(aszBBox[0])) / 2);
        nCenterLat = Number(aszBBox[1]) + 
            ((Number(aszBBox[3]) - Number(aszBBox[1])) / 2);

        szCity = aszURL['city'];

    }
    //else
    //{
    //    alert("Please select a city!");
    //    return true;
    //}

    if(aszURL['zoomlevel'])
    {
        nZoomLevel = Number(aszURL['zoomlevel']);
    }

    map = new OpenLayers.Map( 'ShowMap' , 
                              {
                                controls: [new OpenLayers.Control.MouseDefaults()] , 
                                'numZoomLevels':15, maxExtent: maxExtent
                              }
                            );


    var normal = new OpenLayers.Layer.Google( "Google Maps" , {type: G_NORMAL_MAP, 'numZoomLevels':17} );
    var hybrid = new OpenLayers.Layer.Google( "Google Hybrid Maps" , {type: G_HYBRID_MAP, 'numZoomLevels':17} );
    var satellite = new OpenLayers.Layer.Google( "Google Satellite Maps" , {type: G_SATELLITE_MAP, 'numZoomLevels':17} );

    var canstreets = new OpenLayers.Layer.WMS.Untiled( "Canada Streets", 
                                               "http://72.55.168.140:8080/cgi-bin/mapserv.exe?map=/ms4w/apps/porchlight/map/canstreets.map", 
                                               {layers: 'Streets', transparent: "true", format: "image/gif"}, 
                                               {isBaseLayer: false, opacity: 0.50, numZoomLevels: 23 } );
    szCanStreetsIndex = canstreets.id;

    map.addLayers([normal, satellite, hybrid, canstreets]);

    map.setCenter(new OpenLayers.LonLat(nCenterLon, nCenterLat), nZoomLevel);
    
    map.addControl( new OpenLayers.Control.LayerSwitcher() );
    map.addControl( new OpenLayers.Control.PanZoomBar() );

}



function googleMapsAPIGeocode(szAddress)
{
    var geocoder = new GClientGeocoder();

    geocoder.getLatLng(
        szAddress + ", Drayton Valley",
        function(point) {
          if (!point) {
            alert(szAddress + " not found");
          } else {
            var oPoint = new OpenLayers.LonLat(point.x,
                            point.y);
            map.setCenter(oPoint, 15);
          }
        }
      );
}