#define CL_HPP_MINIMUM_OPENCL_VERSION 120
#define CL_HPP_TARGET_OPENCL_VERSION 120

#include <QCoreApplication>
#include <QFile>
#include <QTextStream>
#include <CL/cl2.hpp>
#include <QDebug>

QString readFile(const QString& directory)
{
    QFile cl_file(directory);
    if(!cl_file.open(QIODevice::ReadOnly))
    {
        qDebug() << cl_file.errorString();
        return QString("");
    }
    QString script = cl_file.readAll();
    cl_file.close();
    return script;
}

/*********************************************************************************************************************/
int main(int argc, char* argv[])
{
    QCoreApplication a(argc, argv);

    std::vector<cl::Platform> all_platforms;
    cl::Platform::get(&all_platforms);
    qDebug() << "- Number of platforms found: " << all_platforms.size();
    foreach(auto platform, all_platforms)
    {
        qDebug() << "- Platform name: " << platform.getInfo<CL_PLATFORM_NAME>().data();
    }

    std::vector<cl::Device> all_devices;
    all_platforms.front().getDevices(CL_DEVICE_TYPE_GPU, &all_devices);
    foreach(auto device, all_devices)
    {
        qDebug() << "- Device Info: " << device.getInfo<CL_DEVICE_NAME>().data();
    }

    cl::Context main_context(all_devices.front());

    auto script = readFile("../OpenCL/test1.cl");
    cl_int error;
    cl::Program program(main_context, script.toStdString(), CL_TRUE, &error);
    qDebug() << "Program error code: " << error;

    cl::Kernel kernel(program, "myVeryFirstFinction", &error);
    qDebug() << "Kernel error code: " << error;

    cl::KernelFunctor<> Functor(kernel);
    cl::CommandQueue queue(main_context, all_devices.front());
    cl::NDRange range(5,2);
    cl::EnqueueArgs enargs(queue, range);
    Functor(enargs);

    return a.exec();
}