package org.gcube.portlet.user.my_vres.client;


import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashMap;

import org.gcube.portlet.user.my_vres.client.widgets.ClickableVRE;
import org.gcube.portlet.user.my_vres.shared.VO;
import org.gcube.portlet.user.my_vres.shared.VRE;

import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.VerticalPanel;
/**
 * 
 * @author Massimiliano Assante - ISTI CNR
 * @version 1.1 Dec 2012
 *
 */
public class VresPanel extends Composite {
	/**
	 * Create a remote service proxy to talk to the server-side service
	 */
	private final MyVREsServiceAsync myVREsService = GWT.create(MyVREsService.class);
	private FlowPanel flowPanel;
	private VerticalPanel mainPanel = new VerticalPanel();
	private HorizontalPanel changeViewPanel = new HorizontalPanel();
	private HorizontalPanel imagesPanel = new HorizontalPanel();

	private LinkedHashMap<String, ArrayList<VRE>> cachedVREs = null;

	boolean hasVres = false;

	public VresPanel() {
		super();		

		mainPanel.setWidth("100%");
		mainPanel.setStyleName("mainPanel");
		this.flowPanel = new FlowPanel();
		flowPanel.setWidth("100%");
		flowPanel.setStyleName("flowPanel");

		changeViewPanel.setWidth("95%");
		changeViewPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_RIGHT);
		changeViewPanel.add(imagesPanel);
		loadVREs();
		initWidget(mainPanel);
	}

	private void loadVREs() {

		myVREsService.getUserVREs(new AsyncCallback<LinkedHashMap<String,ArrayList<VRE>>>() {

			@Override
			public void onFailure(Throwable caught) {
				flowPanel.add(new HTML("Could not fetch personal VREs: " + caught.getMessage()));							
			}

			@Override
			public void onSuccess(LinkedHashMap<String, ArrayList<VRE>> result) {
				cachedVREs = result;
				showIconView();

			}
		});


	}

	private void showIconView() {
		mainPanel.clear();
		flowPanel.clear();
		mainPanel.add(changeViewPanel);
		mainPanel.add(flowPanel);

		ArrayList<VRE> sortedVREs = new ArrayList<VRE>();
		for (String cat : cachedVREs.keySet()) {
			for (VRE vre: cachedVREs.get(cat)) {
				sortedVREs.add(vre);
				hasVres = true;
			}
		}



		for (VRE vre : sortedVREs) {
			ClickableVRE vreButton = new ClickableVRE(vre, myVREsService);
			flowPanel.add(vreButton);
		}

		if (!hasVres) {
			mainPanel.add(new NoVresPanel());
			imagesPanel.clear();
		}

	}




}