// Copyright (c) 2015-16 Tom Deakin, Simon McIntosh-Smith,
// University of Bristol HPC
//
// For full license terms please see the LICENSE file distributed with this
// source code

#pragma once

#include <sstream>

#include "Stream.h"

#include "CL/sycl.hpp"

#define IMPLEMENTATION_STRING "SYCL"

// allows a use of 'parallel_for' currently known to be supported by ComputeCpp
#define COMPUTECPP_CE

namespace sycl_kernels
{
  template <class T> class init;
  template <class T> class copy;
  template <class T> class mul;
  template <class T> class add;
  template <class T> class triad;
  template <class T> class dot;
}

template <class T>
class SYCLStream : public Stream<T>
{
  protected:
    // Size of arrays
    unsigned int array_size;

    // SYCL objects
    cl::sycl::queue *queue;
    cl::sycl::buffer<T> *d_a;
    cl::sycl::buffer<T> *d_b;
    cl::sycl::buffer<T> *d_c;
    cl::sycl::buffer<T> *d_sum;

    // SYCL kernel names
    typedef sycl_kernels::init<T> init_kernel;
    typedef sycl_kernels::copy<T> copy_kernel;
    typedef sycl_kernels::mul<T> mul_kernel;
    typedef sycl_kernels::add<T> add_kernel;
    typedef sycl_kernels::triad<T> triad_kernel;
    typedef sycl_kernels::dot<T> dot_kernel;

    // NDRange configuration for the dot kernel
    size_t dot_num_groups;
    size_t dot_wgsize;

  public:

    SYCLStream(const unsigned int, const int);
    ~SYCLStream();

    virtual void copy() override;
    virtual void add() override;
    virtual void mul() override;
    virtual void triad() override;
    virtual T    dot() override;

    virtual void init_arrays(T initA, T initB, T initC) override;
    virtual void read_arrays(std::vector<T>& a, std::vector<T>& b, std::vector<T>& c) override;

};

// Populate the devices list
void getDeviceList(void);