package org.gcube.portlets.user.gcubeloggedin.client.ui;

import org.gcube.portlets.user.gcubeloggedin.client.LoggedinServiceAsync;
import org.gcube.portlets.user.gcubeloggedin.client.UIConstants;
import org.gcube.portlets.user.gcubeloggedin.shared.VObject;
import org.gcube.portlets.widgets.sessionchecker.client.CheckSession;

import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Document;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.Window.Location;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.Widget;

public class AboutView extends Composite {

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

	interface AboutViewUiBinder extends UiBinder<Widget, AboutView> {
	}

	public AboutView() {
		initWidget(uiBinder.createAndBindUi(this));
	}
	private WarningAlert wa;

	@UiField HTMLPanel htmlPanel;
	@UiField HTML description;
	@UiField Button backButton;
	@UiField Button leaveButton;

	private  LoggedinServiceAsync loggedinService;

	public AboutView(VObject vobj, LoggedinServiceAsync loggedinService) {
		initWidget(uiBinder.createAndBindUi(this));
		this.loggedinService = loggedinService;
		description.setHTML("<img class=\"imageVRE\" src=\"" +  vobj.getImageURL() + "\" />" + vobj.getDescription());
		leaveButton.getElement().getStyle().setBackgroundColor("#F2DEDE");
		leaveButton.getElement().getStyle().setBorderColor("#EBCCD1");
		leaveButton.getElement().getStyle().setColor("#A94440");
		
		 wa = new WarningAlert("Are you sure you want to leave this group? "
					+ "By leaving this group you will no longer receive updates and loose the workspace folder related to the group.", this);
	}

	@UiHandler("backButton")
	void onClick(ClickEvent e) {
		loggedinService.getDefaultCommunityURL(new AsyncCallback<String>() {
			public void onSuccess(String url) {
				Window.open(url, "_self", "");									
			}	
			public void onFailure(Throwable arg0) {
				Window.alert("We're sorry we couldn't reach the server, try again later ... " + arg0.getMessage());
			}								
		});
	}

	@UiHandler("leaveButton")
	void onUnsubscribe(ClickEvent e) {
		
		htmlPanel.add(wa);
	}

	
	protected void abandonGroup() {
		htmlPanel.remove(wa);
		final HTML loading = getLoadingHTML();
		htmlPanel.add(loading);
		loggedinService.removeUserFromVRE(new AsyncCallback<String>() {
			@Override
			public void onSuccess(String result) {
				if (result != null)
					Location.assign(result);
				else 
					CheckSession.showLogoutDialog();

			}
			@Override
			public void onFailure(Throwable caught) {
				htmlPanel.remove(loading);
				Window.alert("We're sorry we couldn't reach the server, try again later ... " + caught.getMessage());				
			}			
		});
	}
	
	/**
	 * 
	 * @return
	 */
	private HTML getLoadingHTML() {
		return new HTML(
		"<center><table border='0'>"+
		"<tr>"+
		"<td>"+
		"<img src='" + UIConstants.LOADING_IMAGE + "'>"+
		"</td></tr>"+
		"</table></center>") ;
	}

}