#pragma once

#include "portaudio.h"
#include "libpd/PdBase.hpp"
#include "./types.h"

namespace node_lib_pd {

/**
 * portaudio wrapper
 * adapted from: http://portaudio.com/docs/v19-doxydocs/paex__sine__c_09_09_8cpp_source.html
 */
class PaWrapper {
  public:
    PaWrapper();
    ~PaWrapper();

    /**
     * init the port audio stream and store the informations needed in audio
     * callback
     */
    bool init(audio_config_t * audioConfig, pd::PdBase * pd);
    // void clear();
    void listDevices();

    /**
     * accessor for the PaStream
     */
    PaStream * getStream();

    /**
     * last `Pa::timeInfo->outputBufferDacTime`
     */
    double currentTime;

  private:
    audio_config_t * audioConfig_;
    pd::PdBase * pd_;

    PaError paInitErr_;
    PaStream * paStream_;

    /**
     * The instance callback, where we have access to every method/variable in object of class Sine
     */
    int paCallbackMethod(
      const void * inputBuffer,
      void * outputBuffer,
      unsigned long framesPerBuffer,
      const PaStreamCallbackTimeInfo * timeInfo,
      PaStreamCallbackFlags statusFlags);

    /**
     * This routine will be called by the PortAudio engine when audio is needed.
     * It may called at interrupt level on some machines so don't do anything
     * that could mess up the system like calling malloc() or free().
     */
    static int paCallback(
      const void * inputBuffer,
      void * outputBuffer,
      unsigned long framesPerBuffer,
      const PaStreamCallbackTimeInfo * timeInfo,
      PaStreamCallbackFlags statusFlags,
      void * userData)
    {
      return ((PaWrapper *)userData)->paCallbackMethod(
        inputBuffer, outputBuffer, framesPerBuffer, timeInfo, statusFlags);
    }
};

}; // namespace