package edu.uci.ics.inf117.mstar.filter;

import java.util.Vector;

import edu.uci.ics.inf117.mstar.event.Point;
import edu.uci.ics.inf117.mstar.event.StarboardEvent;
import edu.uci.ics.inf117.mstar.gesture.GestureAnalyzer;


public class Filter implements CoordinateFilter
{
	private Vector<StarboardEvent> events;
	private GestureAnalyzer gestureHandler;
	private boolean leftClick;
	private boolean prevIsRelease;
	private boolean sendDataToApplication;
	private boolean mouseIsDown;

	private Point previous;


	private final int TOLERANCE = 10;

	private enum LeftButtonState {LB_UP, LB_DOWN}

	private LeftButtonState leftMouseState = LeftButtonState.LB_UP;

	public Filter(GestureAnalyzer analyzer)
	{
		gestureHandler = analyzer;
		events = new Vector<StarboardEvent>();

		leftClick = false;
		prevIsRelease = false;
		sendDataToApplication = false;
		mouseIsDown = false;
	}



	// the current filter does two things
	// 1) get rid of extra point after release
	// 2) (NOT YET IMPLEMENTED) it makes sure that related inputs
	@Override
	public void filterEvent(StarboardEvent e)
	{

		if (sendDataToApplication)
		{
			// We are getting an extra point after a release,which doesn't make sense,
			// so we want to get rid of it
			if (mouseIsDown)
			{
				if (e.getPoint().released() == 1)
				{
					mouseIsDown = false;
				}

				if (currentPointInValidRange(e.getPoint()))
				{
					System.out.println("valid point");

					gestureHandler.receiveFilteredEvent(e);
					previous = e.getPoint();
				}
				else
				{
					System.out.println("invalid point!");

				}
			}
			else
			{
				if (e.getPoint().click() == 1)
				{
					mouseIsDown = true;
					previous = e.getPoint();
					gestureHandler.receiveFilteredEvent(e);
				}
			}
		}
		else
		{
			// this makes sure no points get sent to the application until the board
			// has actually been touched. Since an LC is always the first thing to
			// be sent when the board is first touched, we can check for that
			if (e.getPoint().click() == 1)
			{
				sendDataToApplication = true;
				mouseIsDown = true;
				previous = e.getPoint();
				gestureHandler.receiveFilteredEvent(e);
			}
		}
	}

	private boolean currentPointInValidRange(Point current)
	{
		/*if ((Math.abs(previous.getX()- current.getX()) > TOLERANCE) ||
				(Math.abs(previous.getX() - current.getY()) > TOLERANCE))
		{
			return false;
		}
		else
		{
			return true;
		}*/

		System.out.println("Current Point: (" + current.getX() + ", " + current.getY() +")");
		System.out.println("Previous Point: (" + previous.getX() + ", " + previous.getY() +")");

		return true;
	}





}