// "Readers" represent different methods for reading the state of a pin.
// They also include debouncing logic using the Bounce2 library, when appropriate.

#ifndef _READER_H_
#define _READER_H_

#include "Matrix.h"
#include <Arduino.h>
#include <Bounce2.h>
#include <Mux.h>

using namespace admux;

// The abstract base class - a very simple interface
class Reader {
 public:
  Reader(bool inverted);

  virtual bool Update() = 0; // should return true if the state of the pin has changed
  bool On();

 protected:
  uint8_t getMode(bool pullup);

  Bounce bouncer;
  bool inverted;
};


// A standard reader; the button is connected directly to a switch
class DirectReader : public Reader {
 public:
  DirectReader(uint8_t pin, bool inverted = true);
  bool Update();
  bool On();
};


// The button is connected to a Multiplexer channel
class MuxReader : public Reader {
 public:
  MuxReader(uint8_t channel, Mux* mux, bool inverted = true);
  bool Update();
  bool On();

 protected:
  uint8_t channel;
  Mux * mux;
};


// The button is connected via a scan matrix
// "row" should always be the input, with "col" the selecter.
class MatrixReader : public Reader {
 public:
  MatrixReader(uint8_t row, uint8_t col, Matrix* matrix, bool inverted = true);
  bool Update();
  bool On();

 protected:
  uint8_t col;
  Matrix* matrix;
};

#endif