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/* \file
   \brief Defines profiling functionality for reduction operation

*/

#pragma once

#include <vector>
#include <string>
#include <memory>
#include <algorithm>
#include <unordered_map>

// CUTLASS Library includes
#include "cutlass/library/library.h"
#include "cutlass/library/util.h"
#include "cutlass/library/manifest.h"

// Profiler includes
#include "options.h"
#include "device_context.h"
#include "operation_profiler.h"
#include "performance_result.h"
#include "problem_space.h"
#if CUTLASS_ENABLE_CUDNN
#include "cudnn_helpers.h"
#endif //#if CUTLASS_ENABLE_CUDNN
#include "debug.h"

/////////////////////////////////////////////////////////////////////////////////////////////////

namespace cutlass {
namespace profiler {

/////////////////////////////////////////////////////////////////////////////////////////////////

/// Abstract base class for each math function
class ReductionOperationProfiler : public OperationProfiler {
public:


  /// Workspace used 
  struct ReductionWorkspace {

    /// Conv device allocations
    DeviceAllocation *Workspace;
    DeviceAllocation *Source;
    DeviceAllocation *Destination;
    DeviceAllocation *Reference;
    
    /// Library configuration and arguments
    library::ReductionConfiguration configuration;
    library::ReductionArguments arguments;

    /// Buffer used for the cutlass operations' host workspace
    std::vector<uint8_t> host_workspace;

    /// Buffer used for the cutlass operations' device workspace
    DeviceAllocation device_workspace;

    //
    // Methods
    //

    ReductionWorkspace(): 
      Workspace(nullptr), Source(nullptr), Destination(nullptr), Reference(nullptr) { }
  };

protected:

  //
  // Data members
  //

  /// Reduction problem obtained from problem space
  MatrixCoord problem_;

  /// Device memory allocations 
  ReductionWorkspace conv_workspace_;


public:
  //
  // Methods
  //

  /// Ctor
  ReductionOperationProfiler(Options const &options);

  /// Destructor
  virtual ~ReductionOperationProfiler();

  /// Prints usage statement for the math function
  virtual void print_usage(std::ostream &out) const;

  /// Prints examples
  virtual void print_examples(std::ostream &out) const;

  /// Extracts the problem dimensions
  virtual Status initialize_configuration(
    Options const &options, 
    PerformanceReport &report, 
    DeviceContext &device_context,
    library::Operation const *operation,
    ProblemSpace const &problem_space,
    ProblemSpace::Problem const &problem);

  /// Initializes workspace
  virtual Status initialize_workspace(
    Options const &options, 
    PerformanceReport &report, 
    DeviceContext &device_context,
    library::Operation const *operation,
    ProblemSpace const &problem_space,
    ProblemSpace::Problem const &problem);

  /// Verifies CUTLASS against references
  virtual bool verify_cutlass(
    Options const &options,  
    PerformanceReport &report,
    DeviceContext &device_context,
    library::Operation const *operation,
    ProblemSpace const &problem_space,
    ProblemSpace::Problem const &problem);

  /// Measures performance results
  virtual bool profile(
    Options const &options, 
    PerformanceReport &report, 
    DeviceContext &device_context,
    library::Operation const *operation,
    ProblemSpace const &problem_space,
    ProblemSpace::Problem const &problem);
  
};

/////////////////////////////////////////////////////////////////////////////////////////////////

} // namespace profiler
} // namespace cutlass

/////////////////////////////////////////////////////////////////////////////////////////////////