#include <QCoreApplication>

#include <opencv2/core/core.hpp>
#include <opencv2/core/ocl.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc.hpp>
#include <opencv2/imgcodecs.hpp>

#include <QDebug>
#include <QElapsedTimer>


int main(int argc, char *argv[])
{

    QCoreApplication a(argc, argv);
    QElapsedTimer loading;



    loading.start();
    cv::Mat image = cv::imread("C://Effective_Bayer.tif", cv::IMREAD_GRAYSCALE);
    if (image.empty())
        qDebug() << "Image vide";

    else {
        qDebug() << "[CPU] Chargement OK : " << loading.elapsed() << "ms";

        loading.restart();
        cv::Mat image = cv::imread("C://Effective_Bayer.tif", cv::IMREAD_GRAYSCALE);
        cv::UMat image2;
        image.copyTo(image2);
        qDebug() << "[GPU] Chargement OK : " << loading.elapsed() << "ms";


        qDebug() << "Height : " << image.size().height;
        qDebug() << "Width  : " << image.size().width;
        if (image.channels() != 1) {
            qDebug() << image.channels() << "channels found, need 1 only";
            return 0;
        }

        qDebug() << "Channels : " << image.channels();
        qDebug() << "\r\r";

        cv::Mat image_debayer_cpu(image.size().height, image.size().width, CV_16UC3);
        cv::UMat image_debayer_gpu(image.size().height, image.size().width, CV_16UC3);


        std::vector<int> compression_params;
        compression_params.push_back(259);
        compression_params.push_back(1);


        loading.restart();


        cv::cvtColor(image, image_debayer_cpu, cv::COLOR_BayerBG2BGR);
        qDebug() << "[CPU] cv::COLOR_BayerBG2BGR done in :\t\t" << loading.elapsed() << "ms";
        loading.restart();

        cv::cvtColor(image, image_debayer_cpu, cv::COLOR_BayerBG2BGR_EA);
        qDebug() << "[CPU] cv::COLOR_BayerBG2BGR_EA done in :\t" << loading.elapsed() << "ms";
        loading.restart();

        cv::cvtColor(image, image_debayer_cpu, cv::COLOR_BayerBG2BGR_VNG);
        qDebug() << "[CPU] cv::COLOR_BayerBG2BGR_VNG done in :\t" << loading.elapsed() << "ms";
        loading.restart();

        cv::cvtColor(image, image_debayer_cpu, cv::COLOR_BayerBG2BGRA);
        qDebug() << "[CPU] cv::COLOR_BayerBG2BGRA done in :\t\t" << loading.elapsed() << "ms";


        if (cv::ocl::haveOpenCL() == true) {


            cv::ocl::Context ctx = cv::ocl::Context::getDefault();
            if (!ctx.ptr())
            {
                qDebug() << "OpenCL is not available";
                return 1;
            }

            cv::ocl::Device device = cv::ocl::Device::getDefault();
            if (!device.compilerAvailable())
            {
                qDebug() << "OpenCL compiler is not available";
                return 1;
            }


            loading.restart();

            cv::cvtColor(image, image_debayer_gpu, cv::COLOR_BayerBG2BGR);
            qDebug() << "[GPU] cv::COLOR_BayerBG2BGR done in :\t\t" << loading.elapsed() << "ms";
            loading.restart();

            cv::cvtColor(image, image_debayer_gpu, cv::COLOR_BayerBG2BGR_EA);
            qDebug() << "[GPU] cv::COLOR_BayerBG2BGR_EA done in :\t" << loading.elapsed() << "ms";
            loading.restart();

            cv::cvtColor(image, image_debayer_gpu, cv::COLOR_BayerBG2BGR_VNG);
            qDebug() << "[GPU] cv::COLOR_BayerBG2BGR_VNG done in :\t" << loading.elapsed() << "ms";
            loading.restart();

            cv::cvtColor(image, image_debayer_gpu, cv::COLOR_BayerBG2BGRA);
            qDebug() << "[GPU] cv::COLOR_BayerBG2BGRA done in :\t\t" << loading.elapsed() << "ms";




            loading.restart();
            cv::imwrite("Output.tif", image_debayer_cpu, compression_params);
            qDebug() << "saved in : " << loading.elapsed() << "ms";
        }

    }
    return a.exec();
}