L.Cluster = L.Marker.extend({
	
	initialize: function(marker, proprietes, options) {
		L.Marker.prototype.initialize.call(this, marker, options);
		this._proprietes = [proprietes];
	},
	
	ajouterPoint: function(proprietes) {
		this._proprietes.push(proprietes);
		this.setIcon(new L.Icon({ iconUrl : clusterImageUrl, iconSize : [20, 20] }));
	},
	
	recupererPoints: function() {
		return this._proprietes;
	},
	
	obtenirNombrePoints: function() {
		return this._proprietes.length;
	},
	
	supprimerSource: function(sourceSupression) {
		var index = 0;
		while (index < this._markers.length) {
			if (this._proprietes[index].source == sourceSupression) {
				this._proprietes.splice(index, 1);
			} else {
				index ++;
			}
		}
		if (this._markers.length == 0) {
			if (this._map != null) {
				this._map.removeLayer(this);
			}
			delete this;
		}
	},
	
	supprimer: function() {
		while (this._proprietes.length > 0) {
			this._proprietes.splice(0, 1);
		}
		if (this._map != null) {
			this._map.removeLayer(this);
		}
		delete this;
	}
	
});



L.ClusterGroup = L.FeatureGroup.extend({
	
	initialize: function(layers) {
		L.FeatureGroup.prototype.initialize.call(this, layers);
		this._distance = 10;
		this._resolution = 0;
		this._nombreClusters = 0;
	},

	ajouterPoint: function(point, proprietes) {
		if (this._resolution == 0) {
			this._resolution = (2 * Math.PI * 6378137) / (256 * Math.pow(2, this._map.getZoom()));
		}
		var seuilCluster = this._distance * this._resolution;
		var indexClusterPlusProche = this._chercherVoisinPlusProche(point);
		var ajoute = false;
		if (indexClusterPlusProche != null) {
			var distance = this._layers[indexClusterPlusProche].getLatLng().distanceTo(point);
			if (distance < seuilCluster) {
				this._layers[indexClusterPlusProche].ajouterPoint(point, proprietes);
				ajoute = true;
			}
		}
		if (!ajoute) {
			var cluster = creerMarqueur(point, proprietes);
			this._layers[this._nombreClusters] = cluster;
			this._nombreClusters ++;
		}
	},
	
	_chercherVoisinPlusProche: function(point) {
		var distance = -1;
		var plusProche = null;
		for (var numeroLayer in this._layers) {
			if (typeof(this._layers[numeroLayer]) != 'undefined') {
				var pointCluster = this._layers[numeroLayer].getLatLng();
				if (distance == -1 || pointCluster.distanceTo(point) < distance) {
					plusProche = numeroLayer;
					distance = pointCluster.distanceTo(point);
				}
			}
		}
		return plusProche;
	},
	
	afficherClusters: function() {
		for (var numeroLayer in this._layers) {
			if (typeof(this._layers[numeroLayer]) != 'undefined') {
				var layer = this._layers[numeroLayer];
				if (layer.obtenirNombrePoints() > 1) {
					layer.setIcon(new L.Icon({ iconUrl : clusterImageUrl, iconSize : [20, 20] }))
				}
				layer.addTo(map);
			}
		}
	},
	
	supprimerPoint: function(layer) {
		this.removeLayer(layer);
	}
	
});