// Copyright © 2005,2006 by Jef Poskanzer <jef@mail.acme.com>.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.
//
// For commentary on this license please see http://www.acme.com/license.html


// Constructor.
Clusterer = function ( map )
    {
    this.map = map;
    this.markers = [];
    this.clusters = [];
    this.timeout = null;
    this.currentZoomLevel = map.getZoom();

    this.maxVisibleMarkers = Clusterer.defaultMaxVisibleMarkers;
    this.gridSize = Clusterer.defaultGridSize;
    this.minMarkersPerCluster = Clusterer.defaultMinMarkersPerCluster;
    this.maxLinesPerInfoBox = Clusterer.defaultMaxLinesPerInfoBox;
    this.icon = Clusterer.defaultIcon;

    GEvent.addListener( map, 'zoomend', Clusterer.MakeCaller( Clusterer.Display, this ) );
    GEvent.addListener( map, 'moveend', Clusterer.MakeCaller( Clusterer.Display, this ) );
    GEvent.addListener( map, 'infowindowclose', Clusterer.MakeCaller( Clusterer.PopDown, this ) );
    
    };


Clusterer.defaultMaxVisibleMarkers = 150;
Clusterer.defaultGridSize = 5;
Clusterer.defaultMinMarkersPerCluster = 5;
Clusterer.defaultMaxLinesPerInfoBox = 10;

Clusterer.defaultIcon = new GIcon();
Clusterer.defaultIcon.image = '/Style%20Library/images/markers/a_cluster_marker.png';
//Clusterer.defaultIcon.shadow = 'http://www.acme.com/resources/images/markers/shadow_large.PNG';
Clusterer.defaultIcon.iconSize = new GSize( 44, 50 );
//Clusterer.defaultIcon.shadowSize = new GSize( 56, 51 );
Clusterer.defaultIcon.iconAnchor = new GPoint( 17, 47 );
Clusterer.defaultIcon.infoWindowAnchor = new GPoint( 13, 3 );
Clusterer.defaultIcon.infoShadowAnchor = new GPoint( 27, 37 );


// Call this to change the cluster icon.
Clusterer.prototype.SetIcon = function ( icon )
    {
    this.icon = icon;
    };


// Changes the maximum number of visible markers before clustering kicks in.
Clusterer.prototype.SetMaxVisibleMarkers = function ( n )
    {
    this.maxVisibleMarkers = n;
    };


// Sets the minumum number of markers for a cluster.
Clusterer.prototype.SetMinMarkersPerCluster = function ( n )
    {
    this.minMarkersPerCluster = n;
    };


// Sets the maximum number of lines in an info box.
Clusterer.prototype.SetMaxLinesPerInfoBox = function ( n )
    {
    this.maxLinesPerInfoBox = n;
    };


// Call this to add a marker.
Clusterer.prototype.AddMarker = function ( marker, title, tmpofficeId, tmpofficeTitle, officeObj )
    {
    if ( marker.setMap != null )
	marker.setMap( this.map );

    marker.title = title;
    marker.onMap = false;
    marker.clinicObj = officeObj;
    marker.clinicId = tmpofficeId;
    marker.clinicTitle = tmpofficeTitle;
    this.markers.push( marker );
    this.DisplayLater();
    };


// Call this to remove a marker.
Clusterer.prototype.RemoveMarker = function ( marker )
    {
    for ( var i = 0; i < this.markers.length; ++i )
	if ( this.markers[i] == marker )
	    {
	    if ( marker.onMap )
		this.map.removeOverlay( marker );
	    for ( var j = 0; j < this.clusters.length; ++j )
		{
		var cluster = this.clusters[j];
		if ( cluster != null )
		    {
		    for ( var k = 0; k < cluster.markers.length; ++k )
			if ( cluster.markers[k] == marker )
			    {
			    cluster.markers[k] = null;
			    --cluster.markerCount;
			    break;
			    }
		    if ( cluster.markerCount == 0 )
			{
			this.ClearCluster( cluster );
			this.clusters[j] = null;
			}
		    else if ( cluster == this.poppedUpCluster )
			Clusterer.RePop( this );
		    }
		}
	    this.markers[i] = null;
	    break;
	    }
    this.DisplayLater();
    };


Clusterer.prototype.DisplayLater = function ()
    {
    if ( this.timeout != null )
	clearTimeout( this.timeout );
    this.timeout = setTimeout( Clusterer.MakeCaller( Clusterer.Display, this ), 50 );
    };


Clusterer.Display = function ( clusterer )
    {
    var i, j, marker, cluster;

    clearTimeout( clusterer.timeout );

    var newZoomLevel = clusterer.map.getZoom();
    if ( newZoomLevel != clusterer.currentZoomLevel )
	{
	// When the zoom level changes, we have to remove all the clusters.
	for ( i = 0; i < clusterer.clusters.length; ++i )
	    if ( clusterer.clusters[i] != null )
		{
		clusterer.ClearCluster( clusterer.clusters[i] );
		clusterer.clusters[i] = null;
		}
	clusterer.clusters.length = 0;
	clusterer.currentZoomLevel = newZoomLevel;
	}

    // Get the current bounds of the visible area.
    var bounds = clusterer.map.getBounds();

    // Expand the bounds a little, so things look smoother when scrolling
    // by small amounts.
    var sw = bounds.getSouthWest();
    var ne = bounds.getNorthEast();
    var dx = ne.lng() - sw.lng();
    var dy = ne.lat() - sw.lat();
    if ( dx < 300 && dy < 150 )
	{
	dx *= 0.10;
	dy *= 0.10;
	bounds = new GLatLngBounds(
	  new GLatLng( sw.lat() - dy, sw.lng() - dx ),
	  new GLatLng( ne.lat() + dy, ne.lng() + dx ) );
	}

    // Partition the markers into visible and non-visible lists.
    var visibleMarkers = [];
    var nonvisibleMarkers = [];
    for ( i = 0; i < clusterer.markers.length; ++i )
	{
	marker = clusterer.markers[i];
	if ( marker != null )
	    if ( bounds.contains( marker.getPoint() ) )
		visibleMarkers.push( marker );
	    else
		nonvisibleMarkers.push( marker );
	}

    // Take down the non-visible markers.
    for ( i = 0; i < nonvisibleMarkers.length; ++i )
	{
	marker = nonvisibleMarkers[i];
	if ( marker.onMap )
	    {
	    clusterer.map.removeOverlay( marker );
	    marker.onMap = false;
	    }
	}

    // Take down the non-visible clusters.
    for ( i = 0; i < clusterer.clusters.length; ++i )
	{
	cluster = clusterer.clusters[i];
	if ( cluster != null && ! bounds.contains( cluster.marker.getPoint() ) && cluster.onMap )
	    {
	    clusterer.map.removeOverlay( cluster.marker );
	    cluster.onMap = false;
	    }
	}

    // Clustering!  This is some complicated stuff.  We have three goals
    // here.  One, limit the number of markers & clusters displayed, so the
    // maps code doesn't slow to a crawl.  Two, when possible keep existing
    // clusters instead of replacing them with new ones, so that the app pans
    // better.  And three, of course, be CPU and memory efficient.
    if ( visibleMarkers.length > clusterer.maxVisibleMarkers )
	{
	// Add to the list of clusters by splitting up the current bounds
	// into a grid.
	var latRange = bounds.getNorthEast().lat() - bounds.getSouthWest().lat();
	var latInc = latRange / clusterer.gridSize;
	var lngInc = latInc / Math.cos( ( bounds.getNorthEast().lat() + bounds.getSouthWest().lat() ) / 2.0 * Math.PI / 180.0 );
	for ( var lat = bounds.getSouthWest().lat(); lat <= bounds.getNorthEast().lat(); lat += latInc )
	    for ( var lng = bounds.getSouthWest().lng(); lng <= bounds.getNorthEast().lng(); lng += lngInc )
		{
		cluster = new Object();
		cluster.clusterer = clusterer;
		cluster.bounds = new GLatLngBounds( new GLatLng( lat, lng ), new GLatLng( lat + latInc, lng + lngInc ) );
		cluster.markers = [];
		cluster.markerCount = 0;
		cluster.onMap = false;
		cluster.marker = null;
		clusterer.clusters.push( cluster );
		}

	// Put all the unclustered visible markers into a cluster - the first
	// one it fits in, which favors pre-existing clusters.
	for ( i = 0; i < visibleMarkers.length; ++i )
	    {
	    marker = visibleMarkers[i];
	    if ( marker != null && ! marker.inCluster )
		{
		for ( j = 0; j < clusterer.clusters.length; ++j )
		    {
		    cluster = clusterer.clusters[j];
		    if ( cluster != null && cluster.bounds.contains( marker.getPoint() ) )
			{
			cluster.markers.push( marker );
			++cluster.markerCount;
			marker.inCluster = true;
			}
		    }
		}
	    }

	// Get rid of any clusters containing only a few markers.
	for ( i = 0; i < clusterer.clusters.length; ++i )
	    if ( clusterer.clusters[i] != null && clusterer.clusters[i].markerCount < clusterer.minMarkersPerCluster )
		{
		clusterer.ClearCluster( clusterer.clusters[i] );
		clusterer.clusters[i] = null;
		}

	// Shrink the clusters list.
	for ( i = clusterer.clusters.length - 1; i >= 0; --i )
	    if ( clusterer.clusters[i] != null )
		break;
	    else
		--clusterer.clusters.length;

	// Ok, we have our clusters.  Go through the markers in each
	// cluster and remove them from the map if they are currently up.
	for ( i = 0; i < clusterer.clusters.length; ++i )
	    {
	    cluster = clusterer.clusters[i];
	    if ( cluster != null )
		{
		for ( j = 0; j < cluster.markers.length; ++j )
		    {
		    marker = cluster.markers[j];
		    if ( marker != null && marker.onMap )
			{
			clusterer.map.removeOverlay( marker );
			marker.onMap = false;
			}
		    }
		}
	    }

	// Now make cluster-markers for any clusters that need one.
	for ( i = 0; i < clusterer.clusters.length; ++i )
	    {
	    cluster = clusterer.clusters[i];
	    if ( cluster != null && cluster.marker == null )
		{
		// Figure out the average coordinates of the markers in this
		// cluster.
		var xTotal = 0.0, yTotal = 0.0;
		for ( j = 0; j < cluster.markers.length; ++j ){
		    marker = cluster.markers[j];
		    if ( marker != null ){
			    xTotal += ( + marker.getPoint().lng() );
			    yTotal += ( + marker.getPoint().lat() );
			}
			var tmpCurrentIcon = marker.getIcon().image;
		}
		var location = new GLatLng( yTotal / cluster.markerCount, xTotal / cluster.markerCount );
		marker = new GMarker( location, { icon: clusterer.icon } );
		
		cluster.marker = marker;
		GEvent.addListener( marker, 'click', Clusterer.MakeCaller( Clusterer.PopUp, cluster ) );
		}
	    }
	}

    // Display the visible markers not already up and not in clusters.
    for ( i = 0; i < visibleMarkers.length; ++i )
	{
	marker = visibleMarkers[i];
	if ( marker != null && ! marker.onMap && ! marker.inCluster )
	    {
	    clusterer.map.addOverlay( marker );
	    if ( marker.addedToMap != null )
		marker.addedToMap();
	    marker.onMap = true;
	    }
	}

    // Display the visible clusters not already up.
    for ( i = 0; i < clusterer.clusters.length; ++i )
	{
	cluster = clusterer.clusters[i];
	if ( cluster != null && ! cluster.onMap && bounds.contains( cluster.marker.getPoint() ) )
	    {
	    clusterer.map.addOverlay( cluster.marker );
	    cluster.onMap = true;
	    }
	}

    // In case a cluster is currently popped-up, re-pop to get any new
    // markers into the infobox.
    //Clusterer.RePop( clusterer );
    };

// Clusterer.PopUp function revamped and recoded 
// courtesy tnewton@rosettamarketing.com 01/31/2008
Clusterer.PopUp = function(cluster) {
    var clusterer = cluster.clusterer;
    var tmpClusterDiv = document.createElement("div");
    tmpClusterDiv.id = "clusterWindow";
    
    var tmpClusterHead = document.createElement("span");
    tmpClusterHead.id = "header";
    var tmpClusterHeadText = document.createTextNode(Locator.Config.clusterer.labelInfoWinHeadline);
    tmpClusterHead.appendChild(tmpClusterHeadText);
    
    var tmpClusterList = document.createElement("ul");
    tmpClusterList.id = "clusterSet";
    
    //Set style for too many obects in cluster popup window
    if (cluster.markers.length > 4) {
        tmpClusterDiv.style.height = "200px";
        tmpClusterDiv.style.width = "350px";
        tmpClusterDiv.style.overflow = "auto";
    }
    
    var n = 0;
    for(i=0;i<cluster.markers.length;++i) {
        var marker = cluster.markers[i];
        
        var tmpClusterImg = document.createElement("img");
        var tmpClusterText;
        if (marker != null) {
            ++n;
            // change the image to our custom marker for clustering
            var tmpMarkerIconId = marker.clinicId + 1;
            //tmpClusterImg.src = "/Style%20Library/images/markers/cluster_marker_" + tmpMarkerIconId + ".gif";
            var tmpCurrentIcon = marker.getIcon().image;
            var tmpIconLabelLocation = tmpCurrentIcon.indexOf(".png") - 1;
            var tmpIconLabel = tmpCurrentIcon.substr(tmpIconLabelLocation, 1);
            // Following line was
            // var tmpIconType = tmpCurrentIcon.substr(15, 1);
            // prior to Sharepoint integration...
            // since the index of the character we seek depends on the path to the images
            // this line changed post-integration
            // Shmuel Kessler 2/8/09
            var tmpIconType = tmpCurrentIcon.substr(32, 1);
            if (marker.clinicObj.returnId() >= Locator.Config.resultLimit){
                tmpIconLabel = "x";
            }
            tmpClusterImg.src = "/Style%20Library/images/markers/" + tmpIconType + "_result_marker-" + tmpIconLabel + ".gif";
            tmpClusterText = document.createTextNode(marker.title);
            if (i == cluster.markers.length - 1) {
                tmpClusterList.appendChild(buildClusterListItem(tmpClusterImg, tmpClusterText, marker.clinicObj, true));
            } else {
                tmpClusterList.appendChild(buildClusterListItem(tmpClusterImg, tmpClusterText, marker.clinicObj));
            }
        }
	}
	
	tmpClusterDiv.appendChild(tmpClusterHead);
	tmpClusterDiv.appendChild(tmpClusterList);
	
    clusterer.map.closeInfoWindow();
    map.setCenter(cluster.marker.getPoint());
    cluster.marker.openInfoWindowHtml(tmpClusterDiv);
    var tmpToken = GEvent.addListener(map, "moveend", function() {
          Locator.moveMap(0, 50);
          GEvent.removeListener(tmpToken);
        });
    clusterer.poppedUpCluster = cluster;
    
};

function buildClusterListItem(tmpImage, tmpText, officeObj, isLast) {
    var tmpClusterItem = document.createElement("li");
    tmpClusterItem.className = "clearfix";
    
    var tmpClusterItemLabel = document.createElement("span");
    tmpClusterItemLabel.appendChild(tmpText);
    
    tmpClusterItem.appendChild(tmpImage);
    tmpClusterItem.appendChild(tmpClusterItemLabel);
    
    if(isLast) {
        tmpClusterItem.className = "clearfix last";
    }
    var tmpIsTier = false;
    var tmpOfficeTier = officeObj.officeTier;
    if (tmpOfficeTier == "true"){
        tmpIsTier = true;
    }
    tmpClusterItem.onclick = function(){ Locator.viewOverlay(officeObj.returnId(), null, tmpIsTier) }
    tmpClusterItem.onmouseover = function(){ Element.addClassName(this, 'clusterItemHover') }
	tmpClusterItem.onmouseout = function(){ Element.removeClassName(this, 'clusterItemHover') }
    
    return tmpClusterItem
}

function createClusterItemEvents() {
    var tmpClusterListItems = document.getElementById("clusterSet").getElementsByTagName("li");
    for (m=0;m<tmpClusterListItems.length;m++) {
        var tmpField = tmpClusterListItems[m];
        var tmpFieldId = tmpField.id;
        var tmpOfficeId = tmpFieldId.charAt(11);
        tmpClusterListItems[m].onclick = function(){ Locator.viewOverlay(tmpOfficeId) }
    }
};

Clusterer.RePop = function ( clusterer )
    {
    if ( clusterer.poppedUpCluster != null )
	Clusterer.PopUp( clusterer.poppedUpCluster );
    };


Clusterer.PopDown = function ( clusterer )
    {
    clusterer.poppedUpCluster = null;
    };


Clusterer.prototype.ClearCluster = function ( cluster )
    {
    var i, marker;

    for ( i = 0; i < cluster.markers.length; ++i )
	if ( cluster.markers[i] != null )
	    {
	    cluster.markers[i].inCluster = false;
	    cluster.markers[i] = null;
	    }
    cluster.markers.length = 0;
    cluster.markerCount = 0;
    if ( cluster == this.poppedUpCluster )
	this.map.closeInfoWindow();
    if ( cluster.onMap )
	{
	this.map.removeOverlay( cluster.marker );
	cluster.onMap = false;
	}
    };


// This returns a function closure that calls the given routine with the
// specified arg.
Clusterer.MakeCaller = function ( func, arg )
    {
    return function () { func( arg ); };
    };


// Augment GMarker so it handles markers that have been created but
// not yet addOverlayed.

GMarker.prototype.setMap = function ( map )
    {
    this.map = map;
    };

GMarker.prototype.addedToMap = function ()
    {
    this.map = null;
    };

GMarker.prototype.origOpenInfoWindow = GMarker.prototype.openInfoWindow;
GMarker.prototype.openInfoWindow = function ( node, opts )
    {
    if ( this.map != null )
	return this.map.openInfoWindow( this.getPoint(), node, opts );
    else
	return this.origOpenInfoWindow( node, opts );
    };

GMarker.prototype.origOpenInfoWindowHtml = GMarker.prototype.openInfoWindowHtml;
GMarker.prototype.openInfoWindowHtml = function ( html, opts )
    {
    if ( this.map != null )
	return this.map.openInfoWindowHtml( this.getPoint(), html, opts );
    else
	return this.origOpenInfoWindowHtml( html, opts );
    };

GMarker.prototype.origOpenInfoWindowTabs = GMarker.prototype.openInfoWindowTabs;
GMarker.prototype.openInfoWindowTabs = function ( tabNodes, opts )
    {
    if ( this.map != null )
	return this.map.openInfoWindowTabs( this.getPoint(), tabNodes, opts );
    else
	return this.origOpenInfoWindowTabs( tabNodes, opts );
    };

GMarker.prototype.origOpenInfoWindowTabsHtml = GMarker.prototype.openInfoWindowTabsHtml;
GMarker.prototype.openInfoWindowTabsHtml = function ( tabHtmls, opts )
    {
    if ( this.map != null )
	return this.map.openInfoWindowTabsHtml( this.getPoint(), tabHtmls, opts );
    else
	return this.origOpenInfoWindowTabsHtml( tabHtmls, opts );
    };

GMarker.prototype.origShowMapBlowup = GMarker.prototype.showMapBlowup;
GMarker.prototype.showMapBlowup = function ( opts )
    {
    if ( this.map != null )
	return this.map.showMapBlowup( this.getPoint(), opts );
    else
	return this.origShowMapBlowup( opts );
    };