/*----------------    FILE HEADER ---------------------------------------
 This file is part of Geoide.
 Copyright (C) 2005-2006 by:
 IDgis B.V.
 http://www.idgis.nl

 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 This library 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
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

 Contact:

 Herman Assink
 IDgis bv
 P.O. Box 15
 7450 AA Holten
 The Netherlands
 E-Mail: herman.assink@idgis.nl

 * @version 1.4.0
 * @author IDgis team
 * 
 ------------------------------------------------------------------------*/
import nl.idgis.giclient.gis.AttrInfoListener;
import nl.idgis.giclient.gis.Layer;
import nl.idgis.giclient.gis.LayerExpandedListener;
import nl.idgis.giclient.gis.LayerFilteredFeaturesListener;
import nl.idgis.giclient.gis.LayerLoadedFeaturesListener;
import nl.idgis.giclient.gis.LayerRefreshListener;
import nl.idgis.giclient.gis.LayerVisibleListener;
import nl.idgis.giclient.gis.SelectionListener;
import nl.idgis.giclient.gui.mapviewer.MapLayerLoadListener;

class nl.idgis.giclient.gis.LayerEventDispatcher {

    private var layerVisibleListeners:Array = null;
    private var layerExpandedListeners:Array = null;
    private var layerRefreshListeners:Array = null;
    private var layerFilteredFeaturesListeners:Array = null;
    private var layerLoadedFeaturesListeners:Array = null;
    private var selectionListeners:Array = null;
    private var mapLayerLoadListeners:Array = null;
    private var attrInfoListeners:Array = null;
    
    private var loadingSubLayers:Object;

    function LayerEventDispatcher() {
        layerVisibleListeners = new Array();
        layerExpandedListeners = new Array();
        layerRefreshListeners = new Array();
        layerFilteredFeaturesListeners = new Array();
        layerLoadedFeaturesListeners = new Array();
        selectionListeners = new Array();
        mapLayerLoadListeners = new Array();
        attrInfoListeners = new Array();
        
        loadingSubLayers = new Object();
    }

    function addLayerVisibleListener(layerVisibleListener:LayerVisibleListener):Void {
        layerVisibleListeners.push(layerVisibleListener);
    }

    function removeLayerVisibleListener(layerVisibleListener:LayerVisibleListener):Void {
        for (var i:Number = 0; i < layerVisibleListeners.length; i++) {
            if (layerVisibleListener == layerVisibleListeners[i]){
                layerVisibleListeners.splice(i, 1);
            }
        }
    }



    function addLayerExpandedListener(layerExpandedListener:LayerExpandedListener):Void {
        layerExpandedListeners.push(layerExpandedListener);
    }

    function removeLayerExpandedListener(layerExpandedListener:LayerExpandedListener):Void {
        for (var i:Number = 0; i < layerExpandedListeners.length; i++) {
            if (layerExpandedListener == layerExpandedListeners[i]){
                layerExpandedListeners.splice(i, 1);
            }
        }
    }

    function addLayerRefreshListener(layerRefreshListener:LayerRefreshListener):Void {
        layerRefreshListeners.push(layerRefreshListener);
    }

    function removeLayerRefreshListener(layerRefreshListener:LayerRefreshListener):Void {
        for (var i:Number = 0; i < layerRefreshListeners.length; i++) {
            if (layerRefreshListener == layerRefreshListeners[i]){
                layerRefreshListeners.splice(i, 1);
            }
        }
    }

    function addLayerFilteredFeaturesListener(layerFilteredFeaturesListener:LayerFilteredFeaturesListener):Void {
        layerFilteredFeaturesListeners.push(layerFilteredFeaturesListener);
    }

    function removeLayerFilteredFeaturesListener(layerFilteredFeaturesListener:LayerFilteredFeaturesListener):Void {
        for (var i:Number = 0; i < layerFilteredFeaturesListeners.length; i++) {
            if (layerFilteredFeaturesListener == layerFilteredFeaturesListeners[i]){
                layerFilteredFeaturesListeners.splice(i, 1);
            }
        }
    }



  function addLayerLoadedFeaturesListener(layerLoadedFeaturesListener:LayerLoadedFeaturesListener):Void {
    layerLoadedFeaturesListeners.push(layerLoadedFeaturesListener);
    }

    function removeLayerLoadedFeaturesListener(layerLoadedFeaturesListener:LayerLoadedFeaturesListener):Void {
        for (var i:Number = 0; i < layerLoadedFeaturesListeners.length; i++) {
            if (layerLoadedFeaturesListener == layerLoadedFeaturesListeners[i]){
                layerLoadedFeaturesListeners.splice(i, 1);
            }
        }
    }


    function addSelectionListener(selectionListener:SelectionListener):Void {
        selectionListeners.push(selectionListener);
    }

    function removeSelectionListener(selectionListener:SelectionListener):Void {
        for (var i:Number = 0; i < selectionListeners.length; i++) {
            if (selectionListener == selectionListeners[i]){
                selectionListeners.splice(i, 1);
            }
        }
    }

    function addAttrInfoListener(attrInfoListener:AttrInfoListener):Void {
        attrInfoListeners.push(attrInfoListener);
    }

    function removeAttrInfoListener(attrInfoListener:AttrInfoListener):Void {
        for (var i:Number = 0; i < attrInfoListeners.length; i++) {
            if (attrInfoListener == attrInfoListeners[i]){
                attrInfoListeners.splice(i, 1);
            }
        }
    }

    function addMapLayerLoadListener(mapLayerLoadListener:MapLayerLoadListener):Void {
        mapLayerLoadListeners.push(mapLayerLoadListener);
    }

    function removeMapLayerLoadListener(mapLayerLoadListener:MapLayerLoadListener):Void {
        for (var i:Number = 0; i < mapLayerLoadListeners.length; i++) {
            if (mapLayerLoadListener == mapLayerLoadListeners[i]){
                mapLayerLoadListeners.splice(i, 1);
            }
        }
    }

    function changeLayerVisible(layer:Layer):Void {
        updateListeners(layerVisibleListeners);
        for (var i:Number = 0; i < layerVisibleListeners.length; i++) {
            layerVisibleListeners[i].onChangeLayerVisible(layer);
        }
    }

    function changeLayerExpanded():Void {
        updateListeners(layerExpandedListeners);
        for (var i:Number = 0; i < layerExpandedListeners.length; i++) {
            layerExpandedListeners[i].onChangeLayerExpanded();
        }
    }

    function refresh(layer:Layer):Void {
        updateListeners(layerRefreshListeners);
        for (var i:Number = 0; i < layerRefreshListeners.length; i++) {
            layerRefreshListeners[i].onLayerRefresh(layer);
        }
    }

    function changeFilteredFeatures(layer:Layer):Void {
        updateListeners(layerFilteredFeaturesListeners);
        for (var i:Number = 0; i < layerFilteredFeaturesListeners.length; i++) {
            layerFilteredFeaturesListeners[i].onChangeLayerFilteredFeatures(layer);
        }
    }

   function changeLoadedFeatures(layer:Layer):Void {
        updateListeners(layerLoadedFeaturesListeners);
        for (var i:Number = 0; i < layerLoadedFeaturesListeners.length; i++) {
            layerLoadedFeaturesListeners[i].onChangeLayerLoadedFeatures(layer);
        }
    }
    function changeSelectedFeatures(layer:Layer, selected:Boolean, subSelected:Boolean, current:Boolean):Void {
        updateListeners(selectionListeners);
        for (var i:Number = 0; i < selectionListeners.length; i++) {
            selectionListeners[i].onChangeLayerSelectedFeatures(layer, selected, subSelected, current);
        }
    }

    function selectAttrInfoFeatures(layer:Layer):Void {
        updateListeners(attrInfoListeners);
        for (var i:Number = 0; i < attrInfoListeners.length; i++) {
            attrInfoListeners[i].onChangeLayerAttrInfoFeatures(layer);
        }
    }
    
    
    
    function subMapLayerLoadProgress(layer:Layer, percentage:Number):Void {
    	var id:String = layer.getMapConnector().getID() + layer.getName();
    	if(percentage != 0) {
    		loadingSubLayers[id] = percentage;
    	} else {
    		loadingSubLayers[id] = null;
    	}
    	
    	var totalPercentage:Number = 0;
    	var count:Number = 0;   	
    	for(var i:String in loadingSubLayers) {
    		totalPercentage += loadingSubLayers[i];
    		count++;
    	}
    	
    	var resultPercentage = totalPercentage / count;
    	
    	if(resultPercentage == 100) {
    		loadingSubLayers = new Object();
    	} 
    	
    	mapLayerLoadProgress(layer.getSuperLayer(), resultPercentage);
    } 
    
    function mapLayerLoadProgress(layer:Layer, percentage:Number):Void {
    	var superLayer:Layer = layer.getSuperLayer();
    	if(superLayer != null) {
    		superLayer.layerEventDispatcher.subMapLayerLoadProgress(layer, percentage);
    	}
    	
        updateListeners(mapLayerLoadListeners);
        for (var i:Number = 0; i < mapLayerLoadListeners.length; i++) {
            mapLayerLoadListeners[i].onMapLayerLoadProgress(layer, percentage);
        }
    }

    private function updateListeners(listeners:Array):Void {
        for (var i:Number = 0; i < listeners.length; i++) {
            if (listeners[i].toString() == null) { // toString() is necessary as movieclips will never  become null.
                listeners.splice(i--, 1); // i-- because the array that is being looped is also being spliced.
            } else {
                for (var j:Number = 0; j < listeners.length; j++) {
                    if ((listeners[i] == listeners[j]) && (i != j)) {
                        listeners.splice(j--, 1); // j-- because the array that is being looped is also being spliced. i is not affected because j is always greater than i here.
                    }
                }
            }
        }
    }

}