#ifndef IND_SENSOR_LUT_HPP
#define IND_SENSOR_LUT_HPP

#include <stdint.h>

// Piecewise-linear LUT calibration for an inductive sensor.
// adcTable is ADC value at mm = mmMin + i*mmStep, monotonically increasing in i.
typedef struct IndSensorLUT {
  const uint16_t* adcTable;
  uint16_t        length;
  float           mmMin;
  float           mmStep;
} IndSensorLUT;

class IndSensorL {
  public:
    bool oor;
    int8_t oorDir;      // -1 = too close (below LUT), +1 = too far (above LUT), 0 = in range
    float mmVal;
    uint16_t analog;
    float alpha;

    IndSensorL(IndSensorLUT calibration, uint8_t analogPin, float emaAlpha = 0.3f);
    float readMM();

  private:
    IndSensorLUT cal;
    uint8_t pin;
    float filteredRaw;

    float toMM(uint16_t raw);
};

// Per-sensor LUTs generated from A0Calibration/data (4.0..18.0 mm @ 0.1 mm).
extern const IndSensorLUT ind0LUTCal;
extern const IndSensorLUT ind1LUTCal;
extern const IndSensorLUT ind2LUTCal;
extern const IndSensorLUT ind5LUTCal;

// Sensor instances — face → pin/LUT mapping defined in IndSensorLUT.cpp.
// Names shadow IndSensorMap; do not include both headers in the same sketch.
extern IndSensorL indF;
extern IndSensorL indB;
extern IndSensorL indL;
extern IndSensorL indR;

#endif // IND_SENSOR_LUT_HPP