package org.gcube.portlets.widgets.wstaskexecutor.client;

import java.util.ArrayList;
import java.util.List;

import org.gcube.common.workspacetaskexecutor.shared.dataminer.TaskConfiguration;
import org.gcube.common.workspacetaskexecutor.shared.exception.ItemNotConfiguredException;
import org.gcube.common.workspacetaskexecutor.shared.exception.WorkspaceFolderLocked;
import org.gcube.portlets.widgets.wstaskexecutor.client.TaskCompletedNotification.TaskCompletedNotificationListner;
import org.gcube.portlets.widgets.wstaskexecutor.client.rpc.WsTaskExecutorWidgetServiceAsync;
import org.gcube.portlets.widgets.wstaskexecutor.client.view.LoaderIcon;
import org.gcube.portlets.widgets.wstaskexecutor.client.view.WsTaskExecutorWidgetViewManager;
import org.gcube.portlets.widgets.wstaskexecutor.client.view.binder.MonitorFolderTaskExecutionStatusView;
import org.gcube.portlets.widgets.wstaskexecutor.shared.WsFolder;

import com.github.gwtbootstrap.client.ui.Modal;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.user.client.rpc.AsyncCallback;


/**
 * Entry point classes define <code>onModuleLoad()</code>.
 *
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
 * May 4, 2018
 */
public class WsTaskExecutorWidget {

	/**
	 * 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.";
	/**
	 * Create a remote service proxy to talk to the server-side Greeting
	 * service.
	 */
	public static final WsTaskExecutorWidgetServiceAsync greetingService = WsTaskExecutorWidgetServiceAsync.Util.getInstance();

	/** The Constant eventBus. */
	public final static HandlerManager eventBus = new HandlerManager(null);

	private WsTaskExecutorWidgetViewManager viewManager = new WsTaskExecutorWidgetViewManager();

	private final List<TaskCompletedNotificationListner> taskEventsListeners = new ArrayList<TaskCompletedNotificationListner>();

	/**
	 * Instantiates a new ws task executor widget.
	 */
	public WsTaskExecutorWidget() {
		bindEvents();
		// TODO Auto-generated constructor stub
	}

	/**
	 * Bind events.
	 */
	private void bindEvents() {

		// TODO Auto-generated method stub

	}


	/**
	 * Show task configurations folder info.
	 *
	 * @param folder the folder
	 * @throws Exception the exception
	 */
	public void showTaskConfigurationsFolderInfo(final WsFolder folder) throws Exception {

		if(folder==null || folder.getFolderId()==null)
			throw new Exception("Invalid parameter folder null");


		MonitorFolderTaskExecutionStatusView monitor = viewManager.getMonitor(folder);

		//SHOWING CURRENT ACTIVE MONITOR
		if(monitor!=null) {
			GWT.log("Monitor for folder: "+folder.getFolderId() +" exists showing it..");
			viewManager.showMonitorTaskStatusForFolder(folder, taskEventsListeners);
			return;
		}

		final Modal box = new Modal(true);
		box.setTitle("Checking configurations...");
		LoaderIcon loader = new LoaderIcon("Checking folder configurations...");
		box.add(loader);

		GWT.log("Performing isItemSynched: "+folder.getFolderId());

		WsTaskExecutorWidget.greetingService.checkItemTaskConfigurations(folder.getFolderId(), new AsyncCallback<List<TaskConfiguration>>() {

			@Override
			public void onSuccess(List<TaskConfiguration> result) {

				// TODO Auto-generated method stub
			}

			@Override
			public void onFailure(Throwable caught) {

				if(caught instanceof ItemNotConfiguredException){

				}else if(caught instanceof WorkspaceFolderLocked){
					viewManager.showMonitorTaskStatusForFolder(folder,taskEventsListeners);
					return;
				}

			}
		});

//		WsTaskExecutorWidget.greetingService.checkItemTaskConfigurations(folder.getFolderId(), new AsyncCallback<List<TaskConfiguration>>() {
//
//			@Override
//			public void onSuccess(List<TaskConfiguration> result) {
//				box.hide();
//				//GWT.log("WsThreddsSynchFolderDescriptor result: "+result);
//				viewManager.showThreddsFolderInfo(folder, result);
//
//			}
//
//			@Override
//			public void onFailure(Throwable caught) {
//				box.hide();
//
//				if(caught instanceof WorkspaceFolderLocked){
//					viewManager.showMonitorSyncToFolder(folder,syncEventsListeners);
//					return;
//				}
//
//				viewManager.cancelMonitor(folder);
//				// TODO Auto-generated method stub
//				Window.alert(caught.getMessage());
//			}
//		});

		box.show();

	}
}