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/*! \file
  \brief CUTLASS layout visualization tool
*/

#include <map>
#include <iostream>
#include <iomanip>
#include <memory>

#include <cutlass/cutlass.h>

#include "options.h"
#include "register_layout.h"

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

std::map<std::string, std::unique_ptr<VisualizeLayoutBase> > layouts;

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

void print_usage(std::ostream &out) {

  out << "03_visualize_layout <layout> [options]"
    << "\n\n"
    << "  Layouts:\n";

  for (auto const & layout : layouts) {
    out << "    " << layout.first << std::string(46 - layout.first.size(), ' ');
    layout.second->print_help(out);
    out << "\n";
  }

  out << "\n";
    
  Options::print_usage(out);

  out << "\nExamples:\n\n"
      << "$ 03_visualize_layout RowMajor --extent=16,16\n"
      << "$ 03_visualize_layout \"ColumnMajorInterleaved<4>\" --extent=32,8 "
         "--output-shape=16 --vectorize=4\n"
      << "$ 03_visualize_layout \"TensorOpMultiplicand<4,64>\" "
         "--extent=64,64 --vectorize=32 --output-shape=256,4\n"
      << "$ 03_visualize_layout \"TensorOpMultiplicand<4,128>\" "
         "--extent=128,32 --vectorize=32 --output-shape=256,4\n"
      << "$ 03_visualize_layout \"TensorOpMultiplicand<4,256>\" "
         "--extent=256,16 --vectorize=32 --output-shape=256,4\n"
      << "$ 03_visualize_layout \"TensorOpMultiplicand<8,32>\" "
         "--extent=32,64 --vectorize=16 --output-shape=128,4\n"
      << "$ 03_visualize_layout \"TensorOpMultiplicand<8,64>\" "
         "--extent=64,32 --vectorize=16 --output-shape=128,4\n"
      << "$ 03_visualize_layout \"TensorOpMultiplicand<8,128>\" "
         "--extent=128,16 --vectorize=16 --output-shape=128,4\n"
      << "$ 03_visualize_layout \"TensorOpMultiplicand<16,32>\" "
         "--extent=32,32 --vectorize=8 --output-shape=64,4\n"
      << "$ 03_visualize_layout \"TensorOpMultiplicand<16,64>\" "
         "--extent=64,16 --vectorize=8 --output-shape=64,4\n"
      << "$ 03_visualize_layout \"TensorOpMultiplicand<32,16>\" "
         "--extent=16,32 --vectorize=4 --output-shape=32,4\n"
      << "$ 03_visualize_layout \"TensorOpMultiplicand<32,32>\" "
         "--extent=32,16 --vectorize=4 --output-shape=32,4\n"
      << "$ 03_visualize_layout \"TensorOpMultiplicandCongruous<32,32>\" "
         "--extent=32,16 --vectorize=4 --output-shape=32,4\n"
      << "$ 03_visualize_layout \"TensorOpMultiplicandCongruous<64, 16>\" "
         "--extent=16,16 --vectorize=2 --output-shape=16,4\n"
      << "$ 03_visualize_layout \"VoltaTensorOpMultiplicandCrosswise<16,32>\" "
         "--extent=32,64 --vectorize=4 --output-shape=64,4\n"
      << "$ 03_visualize_layout \"VotlaTensorOpMultiplicandCongruous<16>\" "
         "--extent=64,32 --vectorize=8 --output-shape=64,4\n";

  out << std::endl;
}

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

/// Entry point
int main(int argc, char const *arg[]) {

  RegisterLayouts(layouts);

  if (argc == 1 || (std::string(arg[0]) == "-h" || std::string(arg[1]) == "--help")) {
    print_usage(std::cout);
    return 0;
  }

  // parse command line, skipping layout name
  cutlass::CommandLine cmd_line(argc - 1, arg + 1);
  Options options(cmd_line);

  if (options.help) {
    print_usage(std::cout);
    return 0;
  }

  if (!options.good) {
    return -1;
  }

  std::string layout_name = arg[1];

  auto layout_it = layouts.find(layout_name);
  if (layout_it == layouts.end()) {
    std::cerr << "Layout '" << layout_name << "' not supported." << std::endl;
    return -1;
  }

  bool passed  = layout_it->second->visualize(options);
  if (!passed) {
    return -1;
  }

  layout_it->second->print_csv(std::cout);

  cudaFree(0); // Ensure CUDA is available.

  return 0;
}

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