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

import org.gcube.application.geoportalcommon.shared.gis.BoundsMap;
import org.gcube.portlets.user.geoportaldataviewer.client.GeoportalDataViewerConstants;
import org.gcube.portlets.user.geoportaldataviewer.client.GeoportalDataViewerConstants.MAP_PROJECTION;
import org.gcube.portlets.user.geoportaldataviewer.client.gis.ExtentWrapped;
import org.gcube.portlets.user.geoportaldataviewer.client.gis.LightOpenLayerOSM;
import org.gcube.portlets.user.geoportaldataviewer.client.gis.MapUtils;
import org.gcube.portlets.user.geoportaldataviewer.client.ui.map.ExtentMapUtil.Location;
import org.gcube.portlets.user.geoportaldataviewer.client.ui.map.ExtentMapUtil.PLACE;

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.OLFactory;

/**
 * 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 lightOLSM;

	/**
	 * Instantiates a new map view.
	 *
	 * @param centerTo the center to
	 * @param zoom     the zoom
	 */
	public MapView(Coordinate centerTo, int zoom, String internalMapWidth, String internalMapHeight) {
		initWidget(uiBinder.createAndBindUi(this));
		String theMapId = "map" + Random.nextInt();
		theMap.getElement().setId(theMapId);
		theMap.setWidth(internalMapWidth);
		theMap.setHeight(internalMapHeight);

		Scheduler.get().scheduleDeferred(new ScheduledCommand() {

			@Override
			public void execute() {
				lightOLSM = new LightOpenLayerOSM(theMapId);

				// EPSG_3857 LOCATION TO ITALY
				Location italyLocation = ExtentMapUtil.getLocation(PLACE.ITALY);
				Coordinate transformedCenterCoordinate = italyLocation.getCoordinate(MAP_PROJECTION.EPSG_3857);
				lightOLSM.setCenter(transformedCenterCoordinate);
				lightOLSM.setZoom(GeoportalDataViewerConstants.LIGHT_MAP_ITALY_FIT_ZOOM_ON);
			}
		});
	}

	private void setMapSize() {
		Scheduler.get().scheduleDeferred(new ScheduledCommand() {

			@Override
			public void execute() {
				int width = theMap.getParent().getOffsetWidth();
				int height = theMap.getParent().getOffsetHeight();
				if (width == 0)
					width = 300;

				if (height == 0)
					height = 300;

				GWT.log("Internal Map w: " + width + ", h: " + height);
				theMap.setSize(width + "px", height + "px");
			}
		});
	}

	/**
	 * 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 (lightOLSM != null) {
					lightOLSM.addPoint(coordinate, showCoordinateText, true);
					lightOLSM.getMap().getView().setCenter(coordinate);
				}
			}
		});
	}

	/**
	 * Adds the WMS layer.
	 *
	 * @param mapServerHost the map server host
	 * @param layerName     the layer name
	 * @param bbox          the bbox
	 */
	public void addWMSLayer(String mapServerHost, String layerName, BoundsMap bbox) {
		Scheduler.get().scheduleDeferred(new ScheduledCommand() {

			@Override
			public void execute() {

				ExtentWrapped ew = null;
				BoundsMap theBBOX = bbox;

				if (bbox != null) {

					Coordinate lower = OLFactory.createCoordinate(bbox.getLowerLeftX(), bbox.getLowerLeftY());
					Coordinate lowerCoord = MapUtils.transformCoordiante(lower, MAP_PROJECTION.EPSG_4326.getName(),
							MAP_PROJECTION.EPSG_3857.getName());

					Coordinate upper = OLFactory.createCoordinate(bbox.getUpperRightX(), bbox.getUpperRightY());
					Coordinate upperCoord = MapUtils.transformCoordiante(upper, MAP_PROJECTION.EPSG_4326.getName(),
							MAP_PROJECTION.EPSG_3857.getName());

					ew = new ExtentWrapped(lowerCoord.getX(), lowerCoord.getY(), upperCoord.getX(), upperCoord.getY());
					theBBOX = new BoundsMap(lowerCoord.getX(), lowerCoord.getY(), upperCoord.getX(), upperCoord.getY(),
							null);
				}

				lightOLSM.addWMSLayer(mapServerHost, layerName, theBBOX);

				if (ew != null) {

					lightOLSM.getMap().getView().fit(ew);

				}

			}
		});

	}

	public LightOpenLayerOSM getLightOLSM() {
		return lightOLSM;
	}

}