#pragma once
#include "lasp_mathtypes.h"
#include <memory>
#include <optional>

class TimeBufferImp;
/**
 * @brief Implementation of a buffer of time samples, where
 */
class TimeBuffer {
  std::unique_ptr<TimeBufferImp> _imp;

public:
  TimeBuffer();
  ~TimeBuffer();
  /**
   * @brief Put samples in the buffer. Number of channels should match other
   * frames, otherwise things go wrong.
   *
   * @param mat Samples to push, axes should be as mat(frame, channel).
   */
  void push(const dmat &mat);

  /**
   * @brief Reset (empties) the time buffer.
   */
  void reset();

  /**
   * @brief Returns current size of stored amount of frames.
   *
   * @return The current amount of frames in the storage
   */
  us size() const;

  /**
   * @brief Pop frames from the buffer. Throws a runtime error if more frames
   * are requested than actually stored.
   *
   * @param nframes The number of rows
   * @param keep The number of frames to copy, but also to keep in the buffer
   * (usage: overlap)
   *
   * @return Array  time samples for each channel
   */
  dmat pop(const us nframes, const us keep = 0);
};