/*
	ClusterMarker Version 1.3.2
	
	A marker manager for the Google Maps API
	http://googlemapsapi.martinpearman.co.uk/clustermarker
	
	Copyright Martin Pearman 2008
	Last updated 29th September 2008

	This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

	You should have received a copy of the GNU General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.
	
*/


  //small icon
  var clustS = new GIcon();
  clustS.iconSize=new GSize(32,32);
  clustS.iconAnchor=new GPoint(16,16);
  clustS.infoWindowAnchor=new GPoint(16,0);
  clustS.image = "img/clust32.png";

  //medium icon
  var clustM = new GIcon();
  clustM.iconSize=new GSize(48,48);
  clustM.iconAnchor=new GPoint(24,24);
  clustM.infoWindowAnchor=new GPoint(16,0);
  clustM.image = "img/clust48.png";

  //large icon
  var clustL = new GIcon();
  clustL.iconSize=new GSize(64,64);
  clustL.iconAnchor=new GPoint(32,32);
  clustL.infoWindowAnchor=new GPoint(16,0);
  clustL.image = "img/clust64.png";

var clusterIcons = {
  S: {
  	icon: clustS,
  	color: 'green',
  	offset: new GSize(-7, -8)
    //iconAnchor: new GPoint(16, 30)
  },
  
  M: {
  	icon: clustM,
  	color: '#666600',
  	offset: new GSize(-7, -7)
    //iconAnchor: new GPoint(24, 22)
  },
  
  L: {
  	icon: clustL,
  	color: 'red',
  	offset: new GSize(-7, -7)
    //iconAnchor: new GPoint(32, 60)
  }
}

function getClusterSize(num) {
	if (num>60) {
		return "L";
	} else if (num>30) {
		return "M";
	} else {
		return "S";
	}
}

function getEnabledMarkers(markers) {
	var res = Array();
	for (var i=0; i<markers.length; i++) {
		if (markers[i].enabled)
			res.push(markers[i]);
	}
	//alert(markers.length+' to '+res.length);
	return res;
}


/**
 *
 * Cluster Marker
 */


function ClusterMarker($map, $options){
	this._map=$map;
	this._mapMarkers=[];
	this._iconBounds=[];
	this._clusterMarkers=[];
	this._eventListeners=[];
	if(typeof($options)==='undefined'){
		$options={};
	}
	this.borderPadding=($options.borderPadding)?$options.borderPadding:256;
	this.clusteringEnabled=($options.clusteringEnabled===false)?false:true;
	if($options.clusterMarkerClick){
		this.clusterMarkerClick=$options.clusterMarkerClick;
	}
	if($options.clusterMarkerIcon){
		this.clusterMarkerIcon=$options.clusterMarkerIcon;
	}else{
		this.clusterMarkerIcon=new GIcon();
		//this.clusterMarkerIcon.image='http://maps.google.com/mapfiles/arrow.png';
		//this.clusterMarkerIcon.iconSize=new GSize(39, 34);
		
		this.clusterMarkerIcon.image='img/clust48.png';
		this.clusterMarkerIcon.iconSize=new GSize(48, 48);
		
		
		this.clusterMarkerIcon.iconAnchor=new GPoint(24, 22);
		this.clusterMarkerIcon.infoWindowAnchor=new GPoint(9, 31);
		//this.clusterMarkerIcon.shadow='http://www.google.com/intl/en_us/mapfiles/arrowshadow.png';
		//this.clusterMarkerIcon.shadowSize=new GSize(39, 34);
	}
	this.clusterMarkerTitle=($options.clusterMarkerTitle)?$options.clusterMarkerTitle:'Click to zoom in and see %count map entries';
	if($options.fitMapMaxZoom){
		this.fitMapMaxZoom=$options.fitMapMaxZoom;
	}
	this.intersectPadding=($options.intersectPadding)?$options.intersectPadding:0;
	if($options.markers){
		//initialize the markeres for the clusterer
		this.addMarkers( getEnabledMarkers($options.markers) );
	}
	GEvent.bind(this._map, 'moveend', this, this._moveEnd);
	GEvent.bind(this._map, 'zoomend', this, this._zoomEnd);
	GEvent.bind(this._map, 'maptypechanged', this, this._mapTypeChanged);
}

//marin
ClusterMarker.prototype.replaceMarkers=function($markers){
	this.removeMarkers();
	FanMarkerList = {};
	FanMarkerSigs = {};
	this._mapMarkers= new Array();
	var tmp = getEnabledMarkers($markers);
	if (tmp.length>0)
		this.addMarkers( tmp );
}

ClusterMarker.prototype.addMarkers=function($markers){
	var i;
	if(!$markers[0]){
		//	assume $markers is an associative array and convert to a numerically indexed array
		var $numArray=[];
		for(i in $markers){
			$numArray.push($markers[i]);
		}
		$markers=$numArray;
	}
	var ll= null;
	for(i=$markers.length-1; i>=0; i--){
		$markers[i]._isVisible=false;
		$markers[i]._isActive=false;
		$markers[i]._makeVisible=false;
		if ($markers[i].getLatLng) {
			ll = $markers[i].getLatLng().toUrlValue();
			if (!FanMarkerSigs[ ll ])
				FanMarkerSigs[ ll ] = 1
			else
				FanMarkerSigs[ ll ]++;
		}
	}
	this._mapMarkers=this._mapMarkers.concat($markers);
};

ClusterMarker.prototype._clusterMarker=function($clusterGroupIndexes){
	function $newClusterMarker($location, $title, $count){
		//custom labeled marker 
		var label = $count;
		if (label<10) label = "&nbsp;"+label;
		var size = getClusterSize($count);
		
        var opts = { 
          "icon": clusterIcons[ size ].icon, 
          "clickable": true,
          "title": $title,
          "labelText": "<span style='color:"+"#fff"+"; font-weight: bold;'>"+label+"</span>",
          "labelOffset": clusterIcons[ size ].offset
        };
        var m= new LabeledMarker($location, opts);
        return m;
		
		//return new GMarker($location, {icon:$icon, title:$title});
	}
	var $clusterGroupBounds=new GLatLngBounds(), i, $clusterMarker, $clusteredMarkers=[], $marker, $this=this, $mapMarkers=this._mapMarkers;
	for(i=$clusterGroupIndexes.length-1; i>=0; i--){
		$marker=$mapMarkers[$clusterGroupIndexes[i]];
		$marker.index=$clusterGroupIndexes[i];
		$clusterGroupBounds.extend($marker.getLatLng());
		$clusteredMarkers.push($marker);
	}
	//marin - determine the icon type and label etc.
	$clusterMarker=$newClusterMarker($clusterGroupBounds.getCenter(), this.clusterMarkerTitle.replace(/%count/gi, $clusterGroupIndexes.length), $clusterGroupIndexes.length);

	$clusterMarker.clusterGroupBounds=$clusterGroupBounds;	//	only req'd for default cluster marker click action
	this._eventListeners.push(GEvent.addListener($clusterMarker, 'click', function(){
		$this.clusterMarkerClick({clusterMarker:$clusterMarker, clusteredMarkers:$clusteredMarkers });
	}));
	$clusterMarker._childIndexes=$clusterGroupIndexes;
	for(i=$clusterGroupIndexes.length-1; i>=0; i--){
		$mapMarkers[$clusterGroupIndexes[i]]._parentCluster=$clusterMarker;
	}
	return $clusterMarker;
};

ClusterMarker.prototype.clusterMarkerClick=function($args){
	this._map.setCenter($args.clusterMarker.getLatLng(), this._map.getBoundsZoomLevel($args.clusterMarker.clusterGroupBounds));
};

ClusterMarker.prototype._filterActiveMapMarkers=function(){
	var $borderPadding=this.borderPadding, $mapZoomLevel=this._map.getZoom(), $mapProjection=this._map.getCurrentMapType().getProjection(), $mapPointSw, $activeAreaPointSw, $activeAreaLatLngSw, $mapPointNe, $activeAreaPointNe, $activeAreaLatLngNe, $activeAreaBounds=this._map.getBounds(), i, $marker, $uncachedIconBoundsIndexes=[], $oldState, $mapMarkers=this._mapMarkers, $iconBounds=this._iconBounds;
	if($borderPadding){
		$mapPointSw=$mapProjection.fromLatLngToPixel($activeAreaBounds.getSouthWest(), $mapZoomLevel);
		$activeAreaPointSw=new GPoint($mapPointSw.x-$borderPadding, $mapPointSw.y+$borderPadding);
		$activeAreaLatLngSw=$mapProjection.fromPixelToLatLng($activeAreaPointSw, $mapZoomLevel);
		$mapPointNe=$mapProjection.fromLatLngToPixel($activeAreaBounds.getNorthEast(), $mapZoomLevel);
		$activeAreaPointNe=new GPoint($mapPointNe.x+$borderPadding, $mapPointNe.y-$borderPadding);
		$activeAreaLatLngNe=$mapProjection.fromPixelToLatLng($activeAreaPointNe, $mapZoomLevel);
		$activeAreaBounds.extend($activeAreaLatLngSw);
		$activeAreaBounds.extend($activeAreaLatLngNe);
	}
	this._activeMarkersChanged=false;
	if(typeof($iconBounds[$mapZoomLevel])==='undefined'){
		//	no iconBounds cached for this zoom level
		//	no need to check for existence of individual iconBounds elements
		this._iconBounds[$mapZoomLevel]=[];
		this._activeMarkersChanged=true;	//	force refresh(true) as zoomed to uncached zoom level
		for(i=$mapMarkers.length-1; i>=0; i--){
			$marker=$mapMarkers[i];
			$marker._isActive=$activeAreaBounds.containsLatLng($marker.getLatLng())?true:false;
			$marker._makeVisible=$marker._isActive;
			if($marker._isActive){
				$uncachedIconBoundsIndexes.push(i);
			}
		}
	}else{
		//	icondBounds array exists for this zoom level
		//	check for existence of individual iconBounds elements
		for(i=$mapMarkers.length-1; i>=0; i--){
			$marker=$mapMarkers[i];
			$oldState=$marker._isActive;
			$marker._isActive=$activeAreaBounds.containsLatLng($marker.getLatLng())?true:false;
			$marker._makeVisible=$marker._isActive;
			if(!this._activeMarkersChanged && $oldState!==$marker._isActive){
				this._activeMarkersChanged=true;
			}
			if($marker._isActive && typeof($iconBounds[$mapZoomLevel][i])==='undefined'){
				$uncachedIconBoundsIndexes.push(i);
			}
		}
	}
	return $uncachedIconBoundsIndexes;
};

ClusterMarker.prototype._filterIntersectingMapMarkers=function(){
	var $clusterGroup, i, j, $mapZoomLevel=this._map.getZoom(), $mapMarkers=this._mapMarkers, $iconBounds=this._iconBounds;
	for(i=$mapMarkers.length-1; i>0; i--)
	{
		if($mapMarkers[i]._makeVisible){
			$clusterGroup=[];
			for(j=i-1; j>=0; j--){
				if($mapMarkers[j]._makeVisible && $iconBounds[$mapZoomLevel][i].intersects($iconBounds[$mapZoomLevel][j])){
					$clusterGroup.push(j);
				}
			}
			if($clusterGroup.length!==0){
				$clusterGroup.push(i);
				for(j=$clusterGroup.length-1; j>=0; j--){
					$mapMarkers[$clusterGroup[j]]._makeVisible=false;
				}
				this._clusterMarkers.push(this._clusterMarker($clusterGroup));
			}
		}
	}
};

ClusterMarker.prototype.fitMapToMarkers=function(){
	var $mapMarkers=this._mapMarkers, $markersBounds=new GLatLngBounds(), i;
	for(i=$mapMarkers.length-1; i>=0; i--){
		$markersBounds.extend($mapMarkers[i].getLatLng());
	}
	var $fitMapToMarkersZoom=this._map.getBoundsZoomLevel($markersBounds);
		
	if(this.fitMapMaxZoom && $fitMapToMarkersZoom>this.fitMapMaxZoom){
		$fitMapToMarkersZoom=this.fitMapMaxZoom;
	}
	this._map.setCenter($markersBounds.getCenter(), $fitMapToMarkersZoom);
	this.refresh();
};

ClusterMarker.prototype._mapTypeChanged=function(){
	this.refresh(true);
};

ClusterMarker.prototype._moveEnd=function(){
	if(!this._cancelMoveEnd){
		this.refresh();
	}else{
		this._cancelMoveEnd=false;
	}
};

ClusterMarker.prototype._preCacheIconBounds=function($indexes, $mapZoomLevel){
	var $mapProjection=this._map.getCurrentMapType().getProjection(), i, $marker, $iconSize, $iconAnchorPoint, $iconAnchorPointOffset, $iconBoundsPointSw, $iconBoundsPointNe, $iconBoundsLatLngSw, $iconBoundsLatLngNe, $intersectPadding=this.intersectPadding, $mapMarkers=this._mapMarkers;
	for(i=$indexes.length-1; i>=0; i--){
		$marker=$mapMarkers[$indexes[i]];
		$iconSize=$marker.getIcon().iconSize;
		$iconAnchorPoint=$mapProjection.fromLatLngToPixel($marker.getLatLng(), $mapZoomLevel);
		$iconAnchorPointOffset=$marker.getIcon().iconAnchor;
		$iconBoundsPointSw=new GPoint($iconAnchorPoint.x-$iconAnchorPointOffset.x-$intersectPadding, $iconAnchorPoint.y-$iconAnchorPointOffset.y+$iconSize.height+$intersectPadding);
		$iconBoundsPointNe=new GPoint($iconAnchorPoint.x-$iconAnchorPointOffset.x+$iconSize.width+$intersectPadding, $iconAnchorPoint.y-$iconAnchorPointOffset.y-$intersectPadding);
		$iconBoundsLatLngSw=$mapProjection.fromPixelToLatLng($iconBoundsPointSw, $mapZoomLevel);
		$iconBoundsLatLngNe=$mapProjection.fromPixelToLatLng($iconBoundsPointNe, $mapZoomLevel);
		this._iconBounds[$mapZoomLevel][$indexes[i]]=new GLatLngBounds($iconBoundsLatLngSw, $iconBoundsLatLngNe);
	}
};

ClusterMarker.prototype.refresh=function($forceFullRefresh){
	var i, $marker, $zoomLevel=this._map.getZoom(), $uncachedIconBoundsIndexes=this._filterActiveMapMarkers();

	if(this._activeMarkersChanged || $forceFullRefresh){

		this._removeClusterMarkers();
		if(this.clusteringEnabled && $zoomLevel<this._map.getCurrentMapType().getMaximumResolution()){
			if($uncachedIconBoundsIndexes.length>0){
				this._preCacheIconBounds($uncachedIconBoundsIndexes, $zoomLevel);
			}
			this._filterIntersectingMapMarkers();
		}
		
		for(i=this._clusterMarkers.length-1; i>=0; i--){
			this._map.addOverlay(this._clusterMarkers[i]);
		}
		
		for(i=this._mapMarkers.length-1; i>=0; i--){
			$marker=this._mapMarkers[i];
			if(!$marker._isVisible && $marker._makeVisible){
				this._map.addOverlay($marker);
				$marker._isVisible=true;
			}
			if($marker._isVisible && !$marker._makeVisible){
				this._map.removeOverlay($marker);
				$marker._isVisible=false;
			}
		}
	}
};

ClusterMarker.prototype._removeClusterMarkers=function(){
	var i, j, $map=this._map, $eventListeners=this._eventListeners, $clusterMarkers=this._clusterMarkers, $childIndexes, $mapMarkers=this._mapMarkers;
	for(i=$clusterMarkers.length-1; i>=0; i--){
		$childIndexes=$clusterMarkers[i]._childIndexes;
		for(j=$childIndexes.length-1; j>=0; j--){
			if ($mapMarkers[$childIndexes[j]])
				delete $mapMarkers[$childIndexes[j]]._parentCluster;
		}
		$map.removeOverlay($clusterMarkers[i]);
	}
	for(i=$eventListeners.length-1; i>=0; i--){
		GEvent.removeListener($eventListeners[i]);
	}
	this._clusterMarkers=[];
	this._eventListeners=[];
};

ClusterMarker.prototype.removeMarkers=function(){
	var i, $mapMarkers=this._mapMarkers, $map=this._map;
	for(i=$mapMarkers.length-1; i>=0; i--){
		if($mapMarkers[i]._isVisible){
			$map.removeOverlay($mapMarkers[i]);
		}
		delete $mapMarkers[i]._isVisible;
		delete $mapMarkers[i]._isActive;
		delete $mapMarkers[i]._makeVisible;
	}
	this._removeClusterMarkers();
	this._mapMarkers=[];
	this._iconBounds=[];
};

ClusterMarker.prototype.triggerClick=function($index){
	var $marker=this._mapMarkers[$index];
	if($marker._isVisible){
		//	$marker is visible
		GEvent.trigger($marker, 'click');
	}
	else if($marker._isActive){
		//	$marker is clustered
		var $clusteredMarkersIndexes=$marker._parentCluster._childIndexes, $intersectDetected=true, $uncachedIconBoundsIndexes, i, $mapZoomLevel=this._map.getZoom(), $clusteredMarkerIndex, $iconBounds=this._iconBounds, $mapMaxZoomLevel=this._map.getCurrentMapType().getMaximumResolution();
		while($intersectDetected && $mapZoomLevel<$mapMaxZoomLevel){
			$intersectDetected=false;
			$mapZoomLevel++;
			if(typeof($iconBounds[$mapZoomLevel])==='undefined'){
				//	no iconBounds cached for this zoom level
				//	no need to check for existence of individual iconBounds elements
				$iconBounds[$mapZoomLevel]=[];
				// need to create cache for all clustered markers at $mapZoomLevel
				this._preCacheIconBounds($clusteredMarkersIndexes, $mapZoomLevel);
			}else{
				//	iconBounds array exists for this zoom level
				//	check for existence of individual iconBounds elements
				$uncachedIconBoundsIndexes=[];
				for(i=$clusteredMarkersIndexes.length-1; i>=0; i--){
					if(typeof($iconBounds[$mapZoomLevel][$clusteredMarkersIndexes[i]])==='undefined'){
						$uncachedIconBoundsIndexes.push($clusteredMarkersIndexes[i]);
					}
				}
				if($uncachedIconBoundsIndexes.length>=1){
					this._preCacheIconBounds($uncachedIconBoundsIndexes, $mapZoomLevel);
				}
			}
			for(i=$clusteredMarkersIndexes.length-1; i>=0; i--){
				$clusteredMarkerIndex=$clusteredMarkersIndexes[i];
				if($clusteredMarkerIndex!==$index && $iconBounds[$mapZoomLevel][$clusteredMarkerIndex].intersects($iconBounds[$mapZoomLevel][$index])){	
					$intersectDetected=true;
					break;
				}
			}
			
		};
		this._map.setCenter($marker.getLatLng(), $mapZoomLevel);
		this.triggerClick($index);
	}else{
		// $marker is not within active area (map bounds + border padding)
		this._map.setCenter($marker.getLatLng());
		this.triggerClick($index);
	}
};

ClusterMarker.prototype._zoomEnd=function(){
	this._cancelMoveEnd=true;
	this.refresh(true);
};

/**
 * A Fan marker
 */


function FanMarker(point, opts) {
	if (!this.map) this.map = map;

	this.origPoint = point;
	this.line = null;
	
	GMarker.call(this, point , opts);
	GEvent.bind(this, 'remove', this, this.remLine);

}

FanMarkerList = {};
FanMarkerSigs = {};

FanMarker.prototype = new GMarker(new GLatLng(0,0));

FanMarker.prototype.remLine = function() {
	if (this.line!=null)
		this.line.hide();
}

FanMarker.prototype.getOffset = function (count) {
	var res = { x:0, y:0 };
	
    var length = 25;
    var angle = 0.0;
    var angle_stepsize = 0.6;

    angle += (count-1)*angle_stepsize;
    res.x = length * Math.cos (angle);
    res.y = length * Math.sin (angle);

	return res;
}

FanMarker.prototype.offsetting = false;

FanMarker.prototype.redraw = function(force) {
	if (this.offsetting) {
		this.offestting = false;
		GMarker.prototype.redraw.call(this,force);
		return;
	}

   	this.remLine();

	var pt = this.map.fromLatLngToDivPixel(this.origPoint);
	var ptSig = this.origPoint.toUrlValue();
	var newPoint = null;
	
	if (this.map.getZoom() > 10)
	if (FanMarkerSigs[ptSig] > 1 && this.line == null) {

		//OFFSET THE MARKER
		if (FanMarkerList[ptSig])
			FanMarkerList[ptSig]++;
		else
			FanMarkerList[ptSig] = 1;
		
		var pts = new Array();//draw new line
		
		var line1Pt = new GPoint(pt.x, pt.y - 5);
		
		pts[0] = this.map.fromDivPixelToLatLng(line1Pt);

		var offset = this.getOffset( FanMarkerList[ptSig] );
		pt.x += offset.x;
		pt.y -= offset.y;
	
		newPoint = this.map.fromDivPixelToLatLng(pt);
		
		var line2Pt = new GPoint(pt.x, pt.y - 15);
		pts[1] = this.map.fromDivPixelToLatLng(line2Pt);

		
		var lc = this.map.getCurrentMapType().getTextColor();
		this.line = new GPolyline(pts,lc,2,0.5);
		this.map.addOverlay(this.line);
		
		this.offsetting = true;
	} else {
		//DONT DO ANYTHING
		if (this.line != null)
			this.line.show();
	}
	
	if (this.offsetting)
		this.setLatLng(newPoint);
	else
		GMarker.prototype.redraw.call(this,force);

}