package org.gcube.portlets.user.geoportaldataviewer.client.ui.map;

import org.gcube.portlets.user.geoportaldataviewer.client.gis.ExtentWrapped;
import org.gcube.portlets.user.geoportaldataviewer.client.gis.LightOpenLayerOSM;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.Random;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Widget;

import ol.Coordinate;
import ol.Extent;
import ol.layer.Image;

 /**
  * The Class MapView.
  *
  * @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
  * 
  * Nov 11, 2020
  */
 public class MapView extends Composite{

	private static MapViewUiBinder uiBinder = GWT.create(MapViewUiBinder.class);

	/**
	 * The Interface MapViewUiBinder.
	 *
	 * @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
	 * 
	 * Nov 11, 2020
	 */
	interface MapViewUiBinder extends UiBinder<Widget, MapView> {
	}
	
	@UiField
	HTMLPanel theMap;
	
	@UiField
	HorizontalPanel coordinatePanel;
	
	private LightOpenLayerOSM olsm;

//	public MapView(Double x, Double y, boolean showCoordinate) {
//		initWidget(uiBinder.createAndBindUi(this));
//		String theMapId = "map"+Random.nextInt();
//		theMap.getElement().setId(theMapId);
//		//theMap.setSize("300px", "300px");
//		
//		Scheduler.get().scheduleDeferred(new ScheduledCommand() {
//
//			@Override
//			public void execute() {
//				olsm = new LightOpenLayerOSM(theMapId);
//				if(x!=null && y!=null) {
//					Coordinate point = new Coordinate(x, y);
//					addPoint(point);
//				}
//				
//			}
//		});
//	}
	
	/**
	 * Instantiates a new map view.
	 */
	public MapView() {
		initWidget(uiBinder.createAndBindUi(this));
		String theMapId = "map"+Random.nextInt();
		theMap.getElement().setId(theMapId);
		
		Scheduler.get().scheduleDeferred(new ScheduledCommand() {

			@Override
			public void execute() {
				olsm = new LightOpenLayerOSM(theMapId);				
			}
		});
	}
	
	/**
	 * Adds the marker.
	 *
	 * @param coordinate the coordinate
	 * @param showCoordinateText the show coordinate text
	 */
	public void addMarker(Coordinate coordinate,  boolean showCoordinateText) {
		
		Scheduler.get().scheduleDeferred(new ScheduledCommand() {

			@Override
			public void execute() {
				if(olsm!=null) {
					olsm.addPoint(coordinate, showCoordinateText, true);
					olsm.getMap().getView().setCenter(coordinate);
				}
			}
		});
	}
	
	/**
	 * Adds the WMS layer.
	 *
	 * @param mapServerHost the map server host
	 * @param layerName the layer name
	 */
	public void addWMSLayer(String mapServerHost, String layerName){
		Scheduler.get().scheduleDeferred(new ScheduledCommand() {

			@Override
			public void execute() {
				Image layer = olsm.addWMSLayer(mapServerHost, layerName);	
				Extent ext = layer.getExtent();
				GWT.log("WMS layer extent: "+ext);
				if(ext!=null) {
					ExtentWrapped ew = new ExtentWrapped(ext.getLowerLeftX(), ext.getLowerLeftY(), ext.getUpperRightX(), ext.getUpperRightY());
					Coordinate center = ew.getCenter();
					olsm.getMap().getView().setCenter(center);
				}
			}
		});
		
	}
}