#include ".\slidingwindow.h"

#include <iostream>

using namespace std;

SlidingWindow::SlidingWindow(int L)
{
	pixelOffset = 5;
	length = L;
	lastTopIndex = 0;
	lastBotIndex = pixelOffset;
	pixelIndex = pixelOffset+1;
	sizeTop = L-pixelOffset+1;

	numSatBot = 0;
	numSatTop = 0;

	colored = new int[L];

	SlidingWindow::Reset();
}

SlidingWindow::~SlidingWindow(void)
{
	delete [] colored;
}


// Adds a pixel to the array 
void SlidingWindow::AddPixel(int is_Color)
{
	numSatBot -= colored[lastBotIndex];    // the bottom lost this
	numSatTop -= colored[lastTopIndex];    // top lost this

	colored[lastTopIndex] = is_Color;  // new data

	numSatBot += colored[lastTopIndex];
	numSatTop += colored[lastBotIndex];

	updateIndex(&lastTopIndex);
	updateIndex(&lastBotIndex);
	updateIndex(&pixelIndex);
}

// Resets the array 
void SlidingWindow::Reset()
{
	for ( int i = 0; i< length; i++ )
	{
		colored[i] = 0;
	}

	numSatBot = 0;
	numSatTop = 0;
}

// Checks for the correct number of 'white' 
//  above and the corret number of 'non-white' pixels below
//  the middle of the array
int SlidingWindow::ok()
{
	if (numSatTop >= sizeTop  &&  numSatBot <= 0)
		return 1;
	else
	return 0;

}

// same as ok() but is used for debugging purposes...
int SlidingWindow::pok()
{
	cout << "top: " << numSatTop << " " << "bottom: " << numSatBot <<endl;
	if (numSatTop >= sizeTop  &&  numSatBot <= 0)
		return 1;
	else
	return 0;

}