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package org.scijava.app;

import org.scijava.app.event.StatusEvent;
import org.scijava.event.EventService;
import org.scijava.plugin.Parameter;
import org.scijava.plugin.Plugin;
import org.scijava.service.AbstractService;
import org.scijava.service.Service;

/**
 * Default service for status notifications.
 * 
 * @author Curtis Rueden
 */
@Plugin(type = Service.class)
public class DefaultStatusService extends AbstractService implements
	StatusService
{

	@Parameter
	private EventService eventService;

	@Parameter
	private AppService appService;

	// -- StatusService methods --

	@Override
	public void showProgress(final int value, final int maximum) {
		publish(new StatusEvent(value, maximum));
	}

	@Override
	public void showStatus(final String message) {
		publish(new StatusEvent(message));
	}

	@Override
	public void showStatus(final int progress, final int maximum,
		final String message)
	{
		publish(new StatusEvent(progress, maximum, message));
	}

	@Override
	public void warn(final String message) {
		publish(new StatusEvent(message, true));
	}

	@Override
	public void showStatus(final int progress, final int maximum,
		final String message, final boolean warn)
	{
		publish(new StatusEvent(progress, maximum, message, warn));
	}

	@Override
	public void clearStatus() {
		publish(new StatusEvent(""));
	}

	@Override
	public String getStatusMessage(final String appName,
		final StatusEvent statusEvent)
	{
		final String message = statusEvent.getStatusMessage();
		if (!"".equals(message)) return message;
		return appService.getApp(appName).getInfo(false);
	}
	
	/**
	 * Publish the status event to the event service.
	 * The default behavior is to publish status asynchronously.
	 * You can change this behavior by overriding this method
	 * in a derived class.
	 * 
	 * @param statusEvent the event to send to status listeners.
	 */
	protected void publish(final StatusEvent statusEvent)
	{
		eventService.publishLater(statusEvent);
	}

}