#pragma once

#include <boost/signals2.hpp>

#include "config.h"
#include "BPMDetect.h"

// Virtual base class
// Abstraction of BPM detection / setting
class Click
{
public:
  Click(){}
  virtual ~Click(){}
};

// Internally generated
// Configured via: BPM
class InternalClick: public Click
{
public:
  InternalClick(Config& config): m_bpm(config.get_bpm()){}
  virtual ~InternalClick(){}

private:
  int m_bpm;
};

// Generated from MIDI notes
// Configured via channel and note to listen to
class NoteClick: public Click
{
public:
  // signals
  boost::signals2::signal<void()> signal_click;
  boost::signals2::signal<void(int)> signal_bpm;

  NoteClick(Config& config):
    m_channel(config.get_midi_channel()),
    m_note(config.get_midi_note()),
    m_detect(1)
  {
    m_detect.signal_bpm.connect([&](int bpm){signal_bpm(bpm);});
  }

  virtual ~NoteClick(){}

  // slots
  void receive_note(int channel, int note, uint64_t timestamp)
  {
    (void) timestamp;

    if (true || (channel == m_channel && note == m_note)) {
      signal_click();
      m_detect.receive_event();
    }
  }

private:
  int m_channel;
  int m_note;

  BPMDetect m_detect;
};

// Generated from MIDI Clock
class ClockClick: public Click
{
public:
  ClockClick(): m_detect(24)
  {
    m_detect.signal_bpm.connect([&](int bpm){signal_bpm(bpm);});
  }

  virtual ~ClockClick(){}

  // signals
  boost::signals2::signal<void(int)> signal_bpm;

  // slots
  void receive_clock()
  {
    m_detect.receive_event();
  }

private:
  BPMDetect m_detect;
};