// Copyright (c) 2018, 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
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// Author: Johannes L. Schoenberger (jsch-at-demuc-dot-de)

#ifndef COLMAP_SRC_BASE_RECONSTRUCTION_MANAGER_H_
#define COLMAP_SRC_BASE_RECONSTRUCTION_MANAGER_H_

#include <memory>

#include "base/reconstruction.h"

namespace colmap {

class OptionManager;

class ReconstructionManager {
 public:
  ReconstructionManager();

  // Move constructor and assignment.
  ReconstructionManager(ReconstructionManager&& other);
  ReconstructionManager& operator=(ReconstructionManager&& other);

  // The number of reconstructions managed.
  size_t Size() const;

  // Get a reference to a specific reconstruction.
  const Reconstruction& Get(const size_t idx) const;
  Reconstruction& Get(const size_t idx);

  // Add a new empty reconstruction and return its index.
  size_t Add();

  // Add a new reconstruction and return its index. Note that the argument
  // is used to initialize a unique_ptr, thus the caller is responsible to
  // make the original pointer point to nullptr right after the function is
  // called to avoid accessing memory managed by an unique_ptr.
  size_t Add(Reconstruction* reconsturction);

  // Delete a specific reconstruction.
  void Delete(const size_t idx);

  // Delete all reconstructions.
  void Clear();

  // Read and add a new reconstruction and return its index.
  size_t Read(const std::string& path);

  // Write all managed reconstructions into sub-folders "0", "1", "2", ...
  // If the option manager object is not null, the options are written
  // to each respective reconstruction folder as well.
  void Write(const std::string& path, const OptionManager* options) const;

 private:
  NON_COPYABLE(ReconstructionManager)

  std::vector<std::unique_ptr<Reconstruction>> reconstructions_;
};

}  // namespace colmap

#endif  // COLMAP_SRC_BASE_RECONSTRUCTION_MANAGER_H_
