#include <iostream>
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"

using namespace cv;
using namespace std;

int returnBiggest(vector<vector<Point>> counters);

int main(int argc, char** argv)
{
	VideoCapture cap(0);
	if (!cap.isOpened()) { return -1; }
	namedWindow("frame", 1);
	Mat frame, newFrame;
	vector<vector<Point>> contours;
	vector<Vec4i> hierarchy;
	while (true)
	{
		cap >> frame;
		flip(frame, frame, 1);
		imshow("frame", frame);

		cvtColor(frame, newFrame, CV_RGB2HSV);
		inRange(newFrame, Scalar(40, 45, 90), Scalar(85, 100, 160), newFrame);
		findContours(newFrame, contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_NONE, Point(0, 0));
		imshow("newFrame", newFrame);

		// contours.at(returnBiggest(contours));

		if (waitKey(30) == 'q') { break; }
	}
	return 0;
}

int returnBiggest(vector<vector<Point>> counters)
{
	int largest_area = 0;
	int largest_contour_index = 0;
	int i = 0;
	for (i = 0; i < counters.size(); i++) // iterate through each contour.
	{
		double a = contourArea(counters[i], false);  //  Find the area of contour
		if (a > largest_area)
		{
			largest_area = a;
			largest_contour_index = i;                //Store the index of largest contour
		}
	}
	return largest_contour_index;
}