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

import org.gcube.portlets.user.geoportaldataviewer.client.gis.OpenLayerOSM;
import org.gcube.portlets.user.geoportaldataviewer.client.ui.GeonaDataViewMainPanel;
import org.gcube.portlets.user.geoportaldataviewer.client.util.URLUtil;

import com.google.gwt.core.client.EntryPoint;
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.event.logical.shared.ResizeEvent;
import com.google.gwt.event.logical.shared.ResizeHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.RootPanel;

// TODO: Auto-generated Javadoc
/**
 * Entry point classes define <code>onModuleLoad()</code>.
 *
 * @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
 * 
 * Oct 27, 2020
 */
public class GeoportalDataViewer implements EntryPoint {
	/**
	 * The message displayed to the user when the server cannot be reached or
	 * returns an error.
	 */
	private static final String SERVER_ERROR = "An error occurred while "
			+ "attempting to contact the server. Please check your network " + "connection and try again.";

	/** The Constant APP_DIV. */
	public final static String APP_DIV = "geoportal-data-viewer";

	/** The ol map. */
	private OpenLayerOSM olMap = null;

	/** The main panel. */
	private GeonaDataViewMainPanel mainPanel;

	/** The param wms request. */
	private String paramWmsRequest;
	
	/** The param UUID. */
	private String paramUUID;
	
	/** The param layer title. */
	private String paramLayerTitle;
	
	/** The layer manager. */
	private LayerManager layerManager = new LayerManager();
	
	//https://data.d4science.org/gis-viewer-app/?wmsrequest=https%3A%2F%2Fgeona-proto.d4science.org%2Fgeoserver%2Fconcessioni_conf%2Fwms%3Fservice%3DWMS%26version%3D1.1.0%26request%3DGetMap%26layers%3Dconcessioni_conf%3Acentroids_concessioni%26styles%3D%26bbox%3D8.476%2C39.179%2C17.391%2C45.772%26width%3D768%26height%3D567%26srs%3DEPSG%3A4326%26format%3Dapplication%2Fopenlayers&zoom=6&centermap=12.45%2C42.98

	/**
	 * This is the entry point method.
	 */
	public void onModuleLoad() {

		mainPanel = new GeonaDataViewMainPanel();

		RootPanel.get(APP_DIV).add(mainPanel);

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

			@Override
			public void execute() {
				olMap = new OpenLayerOSM(mainPanel.getMapPanel().getElement().getId(),layerManager.getEventBus());
				layerManager.setOlMap(olMap);
				mainPanel.setMap(olMap);

			}
		});

		Window.addResizeHandler(new ResizeHandler() {
			@Override
			public void onResize(ResizeEvent event) {
				GWT.log("onWindowResized width: " + event.getWidth() + " height: " + event.getHeight());
				mainPanel.setMapHeight(event.getHeight() - 200);
			}
		});

		paramWmsRequest = Window.Location.getParameter(GeoportalDataViewerConstants.GET_WMS_PARAMETER);
		paramUUID = Window.Location.getParameter(GeoportalDataViewerConstants.GET_UUID_PARAMETER);
		paramLayerTitle = Window.Location.getParameter(GeoportalDataViewerConstants.GET_LAYER_TITLE);
		GWT.log(GeoportalDataViewerConstants.GET_WMS_PARAMETER + " = " + paramWmsRequest);
		GWT.log(GeoportalDataViewerConstants.GET_UUID_PARAMETER + " = " + paramUUID);
		GWT.log(GeoportalDataViewerConstants.GET_LAYER_TITLE + " = " + paramLayerTitle);

		if (paramWmsRequest != null && !paramWmsRequest.isEmpty()) {

			try {
				//wmsRequestConverter.addRequestToGisViewer(paramWmsRequest, paramLayerTitle, paramUUID);
				//FIND BASE URL
				int indexStart = paramWmsRequest.indexOf("?");
				String url;
				if(indexStart>=0){
					url = paramWmsRequest.substring(0, indexStart); //get only base uri
					url = url.trim(); //string trim
				}else{
					Window.alert("Bad wms request '?' not found!");
//					throw new Exception("Bad server request '?' not found!");
				}

				String layerName = URLUtil.getValueOfParameter("layers", paramWmsRequest);
				String displayName = paramLayerTitle==null || paramLayerTitle.isEmpty()?layerName:paramLayerTitle;
				Scheduler.get().scheduleDeferred(new ScheduledCommand() {

					@Override
					public void execute() {
						layerManager.addLayerByWmsRequest(displayName, layerName, paramWmsRequest, false, false, paramUUID, true);
					}
				});
				
			} catch (Exception e) {
				GWT.log("An error occurred on adding wmsrequest :" + paramWmsRequest, e);
				e.printStackTrace();
			}
		}

	}

}