// Copyright (c) 2022, ETH Zurich and UNC Chapel Hill.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//
//     * Neither the name of ETH Zurich and UNC Chapel Hill nor the names of
//       its contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Author: Johannes L. Schoenberger (jsch-at-demuc-dot-de)

#include "exe/database.h"
#include "exe/feature.h"
#include "exe/gui.h"
#include "exe/image.h"
#include "exe/model.h"
#include "exe/mvs.h"
#include "exe/sfm.h"
#include "exe/vocab_tree.h"
#include "util/version.h"

namespace {

typedef std::function<int(int, char**)> command_func_t;

int ShowHelp(
    const std::vector<std::pair<std::string, command_func_t>>& commands) {
  using namespace colmap;

  std::cout << StringPrintf(
                   "%s -- Structure-from-Motion and Multi-View Stereo\n"
                   "              (%s)",
                   GetVersionInfo().c_str(), GetBuildInfo().c_str())
            << std::endl
            << std::endl;

  std::cout << "Usage:" << std::endl;
  std::cout << "  colmap [command] [options]" << std::endl << std::endl;

  std::cout << "Documentation:" << std::endl;
  std::cout << "  https://colmap.github.io/" << std::endl << std::endl;

  std::cout << "Example usage:" << std::endl;
  std::cout << "  colmap help [ -h, --help ]" << std::endl;
  std::cout << "  colmap gui" << std::endl;
  std::cout << "  colmap gui -h [ --help ]" << std::endl;
  std::cout << "  colmap automatic_reconstructor -h [ --help ]" << std::endl;
  std::cout << "  colmap automatic_reconstructor --image_path IMAGES "
               "--workspace_path WORKSPACE"
            << std::endl;
  std::cout << "  colmap feature_extractor --image_path IMAGES --database_path "
               "DATABASE"
            << std::endl;
  std::cout << "  colmap exhaustive_matcher --database_path DATABASE"
            << std::endl;
  std::cout << "  colmap mapper --image_path IMAGES --database_path DATABASE "
               "--output_path MODEL"
            << std::endl;
  std::cout << "  ..." << std::endl << std::endl;

  std::cout << "Available commands:" << std::endl;
  std::cout << "  help" << std::endl;
  for (const auto& command : commands) {
    std::cout << "  " << command.first << std::endl;
  }
  std::cout << std::endl;

  return EXIT_SUCCESS;
}

}  // namespace

int main(int argc, char** argv) {
  using namespace colmap;

  InitializeGlog(argv);
#ifdef GUI_ENABLED
  Q_INIT_RESOURCE(resources);
#endif

  std::vector<std::pair<std::string, command_func_t>> commands;
  commands.emplace_back("gui", &RunGraphicalUserInterface);
  commands.emplace_back("automatic_reconstructor", &RunAutomaticReconstructor);
  commands.emplace_back("bundle_adjuster", &RunBundleAdjuster);
  commands.emplace_back("color_extractor", &RunColorExtractor);
  commands.emplace_back("database_cleaner", &RunDatabaseCleaner);
  commands.emplace_back("database_creator", &RunDatabaseCreator);
  commands.emplace_back("database_merger", &RunDatabaseMerger);
  commands.emplace_back("delaunay_mesher", &RunDelaunayMesher);
  commands.emplace_back("exhaustive_matcher", &RunExhaustiveMatcher);
  commands.emplace_back("feature_extractor", &RunFeatureExtractor);
  commands.emplace_back("feature_importer", &RunFeatureImporter);
  commands.emplace_back("hierarchical_mapper", &RunHierarchicalMapper);
  commands.emplace_back("image_deleter", &RunImageDeleter);
  commands.emplace_back("image_filterer", &RunImageFilterer);
  commands.emplace_back("image_rectifier", &RunImageRectifier);
  commands.emplace_back("image_registrator", &RunImageRegistrator);
  commands.emplace_back("image_undistorter", &RunImageUndistorter);
  commands.emplace_back("image_undistorter_standalone",
                        &RunImageUndistorterStandalone);
  commands.emplace_back("mapper", &RunMapper);
  commands.emplace_back("matches_importer", &RunMatchesImporter);
  commands.emplace_back("model_aligner", &RunModelAligner);
  commands.emplace_back("model_analyzer", &RunModelAnalyzer);
  commands.emplace_back("model_comparer", &RunModelComparer);
  commands.emplace_back("model_converter", &RunModelConverter);
  commands.emplace_back("model_cropper", &RunModelCropper);
  commands.emplace_back("model_merger", &RunModelMerger);
  commands.emplace_back("model_orientation_aligner",
                        &RunModelOrientationAligner);
  commands.emplace_back("model_splitter", &RunModelSplitter);
  commands.emplace_back("model_transformer", &RunModelTransformer);
  commands.emplace_back("patch_match_stereo", &RunPatchMatchStereo);
  commands.emplace_back("point_filtering", &RunPointFiltering);
  commands.emplace_back("point_triangulator", &RunPointTriangulator);
  commands.emplace_back("poisson_mesher", &RunPoissonMesher);
  commands.emplace_back("project_generator", &RunProjectGenerator);
  commands.emplace_back("rig_bundle_adjuster", &RunRigBundleAdjuster);
  commands.emplace_back("sequential_matcher", &RunSequentialMatcher);
  commands.emplace_back("spatial_matcher", &RunSpatialMatcher);
  commands.emplace_back("stereo_fusion", &RunStereoFuser);
  commands.emplace_back("transitive_matcher", &RunTransitiveMatcher);
  commands.emplace_back("vocab_tree_builder", &RunVocabTreeBuilder);
  commands.emplace_back("vocab_tree_matcher", &RunVocabTreeMatcher);
  commands.emplace_back("vocab_tree_retriever", &RunVocabTreeRetriever);

  if (argc == 1) {
    return ShowHelp(commands);
  }

  const std::string command = argv[1];
  if (command == "help" || command == "-h" || command == "--help") {
    return ShowHelp(commands);
  } else {
    command_func_t matched_command_func = nullptr;
    for (const auto& command_func : commands) {
      if (command == command_func.first) {
        matched_command_func = command_func.second;
        break;
      }
    }
    if (matched_command_func == nullptr) {
      std::cerr << StringPrintf(
                       "ERROR: Command `%s` not recognized. To list the "
                       "available commands, run `colmap help`.",
                       command.c_str())
                << std::endl;
      return EXIT_FAILURE;
    } else {
      int command_argc = argc - 1;
      char** command_argv = &argv[1];
      command_argv[0] = argv[0];
      return matched_command_func(command_argc, command_argv);
    }
  }

  return ShowHelp(commands);
}