// Movement detection.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/core.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/highgui.hpp>
#include <iostream>
#include <deque>
#include <opencv2/video/background_segm.hpp>
#include <windows.h>

using namespace cv;
using namespace std;
int main(int argc, char** argv)
{
    auto source = "C:\\Users\\alior\\Downloads\\Video.mp4";
    VideoCapture inputVideo(source);
    if (!inputVideo.isOpened())
    {
        cout << "Could not open the input video: " << source << endl;
        return -1;
    }

    Mat frame;
    auto substractor = createBackgroundSubtractorMOG2(500, 16, false);

    while (inputVideo.read(frame))
    {
        Mat substracted;

        substractor->apply(frame, substracted);

        auto closingKernel = getStructuringElement(MORPH_ELLIPSE, Size(2, 2));
        auto openingKernel = getStructuringElement(MORPH_ELLIPSE, Size(3, 3));

        Mat opened;
        morphologyEx(substracted, opened, MORPH_OPEN, openingKernel);

        Mat closed;
        morphologyEx(opened, closed, MORPH_CLOSE, closingKernel);


        Mat dilated;
        dilate(closed, dilated, closingKernel, Point(-1, -1), 2);

        vector<vector<Point> > contours;
        vector<Vec4i> hierarchy;
        findContours(dilated, contours, noArray(), CV_RETR_LIST, CV_CHAIN_APPROX_TC89_KCOS);

        float areaThreshold = 5;

        for (int i = 0; i < contours.size(); i++)
        {
            Scalar color = Scalar(255, 0, 0);
            auto rect = boundingRect(contours[i]);
            if (rect.area() < areaThreshold)
                continue;

            rectangle(frame, rect, color, 1);

            //drawContours(frame, contours, i, color, 2, 8, noArray(), 0, Point());
        }

        imshow("Opened", opened);
        imshow("Result", dilated);
        imshow("Movement", substracted);
        imshow("Frame", frame);


        while ((char)waitKey(30) != 'q');
    }

    inputVideo.release();

    return 0;
}