///
/// Copyright (c) 2012, Texas A&M University
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/// The following software was written as part of a collaboration with the
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/// @file   pasteCommand.h
/// @details A PasteCommand object that allows the duplication of selected
/// points in a cloud object as well as undo.
/// @author  Yue Li and Matthew Hielsberg

#pragma once

#include <pcl/apps/point_cloud_editor/command.h>
#include <pcl/apps/point_cloud_editor/localTypes.h>

#include <pcl/memory.h>  // for pcl::shared_ptr

class PasteCommand : public Command
{
  public:
    /// The type for shared pointer pointing to a selection buffer
    using SelectionPtr = pcl::shared_ptr<Selection>;

    /// @brief Constructor
    /// @param copy_buffer_ptr a shared pointer pointing to the copy buffer.
    /// @param selection_ptr a shared pointer pointing to the selection object.
    /// @param cloud_ptr a shared pointer pointing to the cloud object.
    PasteCommand (ConstCopyBufferPtr copy_buffer_ptr,
                  SelectionPtr selection_ptr, CloudPtr cloud_ptr);
    // comment that the selection is updated (also resets the matrix in cloud)

    /// @brief Copy constructor - commands are non-copyable
    PasteCommand (const PasteCommand&) = delete;

    /// @brief Equal operator - commands are non-copyable
    PasteCommand&
    operator= (const PasteCommand&) = delete;
  
  protected:
    /// @brief Appends the points in the copy buffer into the cloud.
    /// @details After appending the points to the cloud, this function also
    /// updates the selection object to point to the newly pasted points.  This
    /// also updates the selection object to point to the newly pasted points.
    void
    execute () override;

    /// @brief Removes the points that were pasted to the cloud.
    void
    undo () override;

  private:
    /// a pointer pointing to the copy buffer.
    ConstCopyBufferPtr copy_buffer_ptr_;

    /// A shared pointer pointing to the selection object.
    SelectionPtr selection_ptr_;

    /// a pointer pointing to the cloud
    CloudPtr cloud_ptr_;

    /// The size of the cloud before new points are pasted. This value is used
    /// to mark the point where points were added to the cloud. In order to
    /// support undo, one only has to resize the cloud using this value.
    unsigned int prev_cloud_size_;
};
