// Copyright (c), ETH Zurich and UNC Chapel Hill.
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are met:
//
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//       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.
//
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#pragma once

#include "colmap/scene/reconstruction.h"

#include <QtCore>
#include <QtGui>
#include <QtWidgets>
#include <unordered_map>

namespace colmap {

class ModelViewerWidget;

class MovieGrabberWidget : public QWidget {
 public:
  MovieGrabberWidget(QWidget* parent, ModelViewerWidget* model_viewer_widget);

  // List of frames, used to visualize the movie grabber camera path.
  std::vector<Frame> frames;

  struct ViewData {
    QMatrix4x4 model_view_matrix;
    float point_size = -1.0f;
    float image_size = -1.0f;
  };

 private:
  // Add, delete, clear viewpoints.
  void Add();
  void Delete();
  void Clear();

  // Assemble movie from current viewpoints.
  void Assemble();

  // Event slot for time modification.
  void TimeChanged(QTableWidgetItem* item);

  // Event slot for changed selection.
  void SelectionChanged(const QItemSelection& selected,
                        const QItemSelection& deselected);

  // Update state when viewpoints reordered.
  void UpdateViews();

  ModelViewerWidget* model_viewer_widget_;

  QPushButton* assemble_button_;
  QPushButton* add_button_;
  QPushButton* delete_button_;
  QPushButton* clear_button_;
  QTableWidget* table_;

  QSpinBox* frame_rate_sb_;
  QCheckBox* smooth_cb_;
  QDoubleSpinBox* smoothness_sb_;

  std::unordered_map<const QTableWidgetItem*, ViewData> view_data_;
};

}  // namespace colmap
