package org.gcube.portlets.user.td.monitorwidget.client;

import java.util.ArrayList;

import org.gcube.portlets.user.td.gwtservice.shared.exception.TDGWTSessionExpiredException;
import org.gcube.portlets.user.td.gwtservice.shared.monitor.OperationMonitor;
import org.gcube.portlets.user.td.gwtservice.shared.monitor.OperationMonitorSession;
import org.gcube.portlets.user.td.monitorwidget.client.details.MonitorDetailPanel;
import org.gcube.portlets.user.td.widgetcommonevent.client.event.SessionExpiredEvent;
import org.gcube.portlets.user.td.widgetcommonevent.client.type.SessionExpiredType;
import org.gcube.portlets.user.td.widgetcommonevent.shared.TRId;

import com.allen_sauer.gwt.log.client.Log;
import com.google.web.bindery.event.shared.EventBus;
import com.sencha.gxt.core.client.util.Margins;
import com.sencha.gxt.widget.core.client.FramedPanel;
import com.sencha.gxt.widget.core.client.ProgressBar;
import com.sencha.gxt.widget.core.client.Window;
import com.sencha.gxt.widget.core.client.button.TextButton;
import com.sencha.gxt.widget.core.client.button.ToolButton;
import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer;
import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer.VerticalLayoutData;
import com.sencha.gxt.widget.core.client.event.SelectEvent;
import com.sencha.gxt.widget.core.client.event.SelectEvent.SelectHandler;
import com.sencha.gxt.widget.core.client.form.FieldSet;

/**
 * AddColumnProgressDialog is a Dialog that show progress of AddColumn
 * 
 * @author "Giancarlo Panichi" <a
 *         href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a>
 * 
 */
public class MonitorDialog extends Window implements MonitorUpdaterListener {
	
	public static final int STATUS_POLLING_DELAY = 1000;
	private static final String WIDTH = "400px";
	private static final String HEIGHT = "120px";
	private EventBus eventBus;
	private String taskId;
	private MonitorUpdater progressUpdater;
	private TextButton ok;
	private TRId trId;
	private String reason;
	private String details;
	
	
	protected boolean backgroundBtnEnabled=true;
	protected ToolButton backgroundBtn;
	
	protected ArrayList<MonitorDialogListener> listeners = new ArrayList<MonitorDialogListener>();
	private MonitorDetailPanel monitorDetailPanel;
	
	
	
	public MonitorDialog(String taskId, EventBus eventBus) {
		this.eventBus = eventBus;
		this.taskId=taskId;
		trId = null;
		initWindow();
		create();
	

	}
	
	protected void initWindow(){
		setWidth(WIDTH);
		setHeight(HEIGHT);
		setBodyBorder(false);
		setResizable(true);
		setModal(true);
		setHeadingText("Progress");
	}
	
	protected void create(){
		FramedPanel panel = new FramedPanel();
		panel.setHeaderVisible(false);
		panel.setBodyBorder(false);

		VerticalLayoutContainer v = new VerticalLayoutContainer();

		ProgressBar progressBar = new ProgressBar();
		
		FieldSet detailsSet = new FieldSet();
		detailsSet.setHeadingText("Details");
		detailsSet.setCollapsible(true);
		
		monitorDetailPanel=new MonitorDetailPanel(eventBus);
		detailsSet.add(monitorDetailPanel);
		
		/*TextField
		
		FlowLayoutContainer progressDetailContainer = new FlowLayoutContainer();
		progressDetailContainer.setScrollMode(ScrollMode.ALWAYS);
	    MarginData layoutData = new MarginData(new Margins(0, 5, 0, 0));
	    c.add(new TextButton("Button 1"), layoutData);
	    c.add(new TextButton("Button 2"), layoutData);
	    c.add(new TextButton("Button 3"), layoutData);
	    Viewport v = new Viewport();
	    v.add(c);
	    RootPanel.get().add(v);
		*/
		
		ok = new TextButton("OK");
		ok.addSelectHandler(new SelectHandler() {

			public void onSelect(SelectEvent event) {
				updateInvocation();

			}
		});

		v.add(progressBar,
				new VerticalLayoutData(1, 1, new Margins(5, 5, 5, 5)));
		
		v.add(detailsSet,new VerticalLayoutData(1, 1, new Margins(5, 5, 5, 5)));
		
		panel.add(v);
		panel.addButton(ok);
		add(panel);

		OperationMonitorSession operationMonitorSession = new OperationMonitorSession(
				taskId);
		progressUpdater = new MonitorUpdater(operationMonitorSession);
		progressUpdater.addListener(new MonitorBarUpdater(progressBar));

		progressUpdater.addListener(this);
		progressUpdater.scheduleRepeating(STATUS_POLLING_DELAY);
		show();
		ok.setVisible(false);
	}

	public void addProgressDialogListener(MonitorDialogListener listener) {
		listeners.add(listener);
	}

	public void removeProgressDialogListener(MonitorDialogListener listener) {
		listeners.remove(listener);
	}

	@Override
	public void monitorInitializing(OperationMonitor operationMonitor) {
		if(monitorDetailPanel!=null){
			monitorDetailPanel.update(operationMonitor);
		}

	}

	@Override
	public void monitorUpdate(OperationMonitor operationMonitor) {
		if(monitorDetailPanel!=null){
			monitorDetailPanel.update(operationMonitor);
		}

	}

	@Override
	public void monitorComplete(TRId trId, OperationMonitor operationMonitor) {
		if(monitorDetailPanel!=null){
			monitorDetailPanel.update(operationMonitor);
		}
		Log.debug("Operation Complete return: " + trId.toString());
		this.trId = trId;
		fireOperationComplete(trId);
		hide();
	}

	@Override
	public void monitorFailed(Throwable caught, String reason, String details, OperationMonitor operationMonitor) {
		if(monitorDetailPanel!=null){
			monitorDetailPanel.update(operationMonitor);
		}
		if (caught instanceof TDGWTSessionExpiredException) {
			eventBus.fireEvent(new SessionExpiredEvent(
					SessionExpiredType.EXPIREDONSERVER));
		} else {
			fireOperationFailed(caught,reason,details);
			hide();

		}
	}

	public void updateInvocation() {
		if (trId != null) {
			fireOperationStopped(trId, reason, details);
		}
		hide();

	}

	@Override
	public void monitorStopped(TRId trId, String reason, String details, OperationMonitor operationMonitor) {
		if(monitorDetailPanel!=null){
			monitorDetailPanel.update(operationMonitor);
		}
		Log.debug("Operation Stopped: [" + trId.toString() + ", " + reason
				+ ", " + details + "]");
		this.trId = trId;
		this.reason = reason;
		this.details = details;
		ok.setVisible(true);

	}

	@Override
	public void monitorGeneratingView(OperationMonitor operationMonitor) {
		if(monitorDetailPanel!=null){
			monitorDetailPanel.update(operationMonitor);
		}

	}

	@Override
	public void monitorValidate(OperationMonitor operationMonitor) {
		if(monitorDetailPanel!=null){
			monitorDetailPanel.update(operationMonitor);
		}

	}
	
	

	@Override
	public void monitorAborted() {
		fireOperationAborted();
		
	}

	@Override
	public void monitorPutInBackground() {
		fireOperationPutInBackground();
		
	}

	protected void fireOperationComplete(TRId trId) {
		for (MonitorDialogListener listener : listeners)
			listener.operationComplete(trId);
	}

	protected void fireOperationFailed(Throwable caught, String reason, String details) {
		for (MonitorDialogListener listener : listeners)
			listener.operationFailed(caught,reason, details);
	}

	protected void fireOperationStopped(TRId trId, String reason, String details) {
		for (MonitorDialogListener listener : listeners)
			listener.operationStopped(trId, reason, details);
	}
	
	protected void fireOperationAborted() {
		for (MonitorDialogListener listener : listeners)
			listener.operationAborted();
	}
	
	protected void fireOperationPutInBackground() {
		for (MonitorDialogListener listener : listeners)
			listener.operationPutInBackground();
	}
	

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected void initTools() {
		if (backgroundBtnEnabled) {
			backgroundBtn = new ToolButton(ToolButton.CLOSE);
			backgroundBtn.setToolTip("Put in the background");
			backgroundBtn.addSelectHandler(new SelectHandler() {

				@Override
				public void onSelect(SelectEvent event) {
					hide();
				}
			});

			header.addTool(backgroundBtn);
		}
		
		super.initTools();

		closeBtn.addSelectHandler(new SelectHandler() {

			public void onSelect(SelectEvent event) {
				close();
			}
		});

	}

	protected void close() {
		hide();

	}

	

}