function MaskAndAction()
{
	this.mask = null;
	this.action = null;
}

function sameDirection(a, b)
{
	if (b > 0 && a > 0) {
		return true;
	}
	if (b < 0 && a < 0) {
		return true;
	}
	if (b == 0 && a == 0) {
		return true;
	}

	return false;
}

function JoystickActionClass()
{
	this.xyRepetitionAllowance = 0;
	this.zRepetitionAllowance = 0;
	this.xyRepetition = 0;
	this.zRepetition = 0;
	this.xyStepQuantum = 1;
	this.zStepQuantum = 1;
	this.previousStateXStep = 0;
	this.previousStateYStep = 0;
	this.previousStateZStep = 0;
	this.previousStateButtons = null;

	this.xyActionFilterByQuadrant = true;
	this.startXYAction = null;
	this.stopXYAction = null;
	this.zActionFilterByDirection = true;
	this.startZAction = null;
	this.stopZAction = null;
	this.buttonsMaskActions = new Array();
	
	this.setXYAction = function(startXYAction,stopXYAction)
	{
		this.startXYAction = startXYAction;
		this.stopXYAction = stopXYAction;
	}

	this.setZAction = function(startZAction,stopZAction)
	{
		this.startZAction = startZAction;
		this.stopZAction = stopZAction;
	}

	this.setXYZRepetitionAllowance = function(xy,z)
	{
		this.xyRepetitionAllowance = xy;
		this.zRepetitionAllowance = z;
	}

	this.setXYZStepQuantum = function(xy,z)
	{
		this.xyStepQuantum = xy;
		this.zStepQuantum = z;
	}

	this.enableXYZDirectionalFilter = function(filterXYByQuadrant,filterZByDirection)
	{
		this.xyActionFilterByQuadrant = filterXYByQuadrant;
		this.zActionFilterByDirection = filterZByDirection;
	}

	this.addButtonAction = function(mask,action)
	{
		var buttonsMaskAction = new MaskAndAction();
		buttonsMaskAction.mask = mask;
		buttonsMaskAction.action = action;

		this.buttonsMaskActions[this.buttonsMaskActions.length] = buttonsMaskAction;
	}

	this.removeButtonAction = function(mask)
	{
		var updatedButtonsMaskActions = new Array();

		for(var i = 0; i < this.buttonsMaskActions.length; ++ i)
		{
			var buttonsMask = this.buttonsMaskActions[i].mask;

			var keepAction = (buttonsMask.length != mask.length);
			for(var j = 0; !keepAction && j < buttonsMask.length; ++ j)
			{
				if (buttonsMask[j] != mask[j])
				{
					keepAction = true;
				}
			}
			if (keepAction)
			{
				updatedButtonsMaskActions[updatedButtonsMaskActions.length] = this.buttonsMaskActions[i];
			}
		}

		this.buttonsMaskActions = updatedButtonsMaskActions;
	}

	this.testAndDoXYAction = function(x,y,z,buttons)
	{
		var xStep = (0 < x ? Math.floor(x / this.xyStepQuantum) : Math.ceil(x / this.xyStepQuantum)) * this.xyStepQuantum;
		var yStep = (0 < y ? Math.floor(y / this.xyStepQuantum) : Math.ceil(y / this.xyStepQuantum)) * this.xyStepQuantum;

		if (this.previousStateXStep == xStep && this.previousStateYStep == yStep)
		{
			++ this.xyRepetition;
		}
		else
		{
			this.xyRepetition = 0;
		}

		if (this.xyRepetition <= this.xyRepetitionAllowance)
		{
			if (null != this.startXYAction && (0 != x || 0 != y)
				&& (!this.xyActionFilterByQuadrant || (!sameDirection(this.previousStateXStep, xStep) || !sameDirection(this.previousStateYStep, yStep))))
			{
				var startXYAction = this.startXYAction.replace("()", "(" + x + "," + y + ")");
				//alert(startXYAction);
				eval(startXYAction);
			}
		
			if (null != this.stopXYAction && (0 == x && 0 == y))
			{
				//alert(this.stopXYAction);
				eval(this.stopXYAction);
			}
		}

		this.previousStateXStep = xStep;
		this.previousStateYStep = yStep;
	}

	this.testAndDoZAction = function(x,y,z,buttons)
	{
		var zStep = (0 < z ? Math.floor(z / this.zStepQuantum) : Math.ceil(z / this.zStepQuantum)) * this.zStepQuantum;
		
		if (this.previousStateZStep == zStep)
		{
			++ this.zRepetition;
		}
		else
		{
			this.zRepetition = 0;
		}
		
		if (this.zRepetition <= this.zRepetitionAllowance)
		{
			if (null != this.startZAction && 0 != z
			    && (!this.zActionFilterByDirection || !sameDirection(this.previousStateZStep, zStep)))
			{
				var startZAction = this.startZAction.replace("()", "(" + z + ")");
				//alert(startZAction);
				eval(startZAction);
			}

			if (null != this.stopZAction && 0 == z)
			{
				//alert(this.stopZAction);
				eval(this.stopZAction);
			}
		}

		this.previousStateZStep = zStep;
	}

	this.testAndDoButtonsAction = function(x,y,z,buttons)
	{
		for(var i = 0; i < this.buttonsMaskActions.length; ++ i)
		{
			if (null == this.previousStateButtons)
			{
				this.previousStateButtons = buttons;
			}

			var buttonsMask = this.buttonsMaskActions[i].mask;

			var matchedMask = true;
			var stateChanged = false;
			for(var j = 0; matchedMask && j < buttonsMask.length && j < buttons.length; ++ j)
			{
				if (-1 != buttonsMask[j])
				{
					if (buttonsMask[j] != buttons[j])
					{
						matchedMask = false;
					}

					if (this.previousStateButtons[j] != buttons[j])
					{
						stateChanged = true;
					}
				}
			}

			if (stateChanged && matchedMask)
			{
				//alert(this.buttonsMaskActions[i].action);
				eval(this.buttonsMaskActions[i].action);
			}
		}

		this.previousStateButtons = buttons;
	}

	this.testAndDoAction = function(x,y,z,buttons)
	{
		var executibles = new Array("this.testAndDoXYAction(x,y,z,buttons);",
									"this.testAndDoZAction(x,y,z,buttons);",
									"this.testAndDoButtonsAction(x,y,z,buttons);");

		for(var executed = 0; executed < executibles.length;)
		{
			var i = Math.floor(Math.random() * executibles.length);

			if (i < executibles.length)
			{
				if (null != executibles[i])
				{
					eval(executibles[i]);
					executibles[i] = null;
					++executed;
				}
			}
		}
	}
}