#ifndef __HISTORY_H
#define __HISTORY_H

#include "HermitCrab.h"  // Assuming CURRENT_STATUS structure is defined elsewhere

#define RING_SIZE (256 * 7)
//#define RING_MASK (RING_SIZE - 1)

class CHistory {
  private:
    int16_t head;
    int16_t tail;
    int16_t count;
    STATUS_TYPE ring[RING_SIZE]; // Ring buffer

    float Kp_Humidity;
    float Kd_Humidity;
    float LR_Humidity;

    float Kp_Temp1;
    float Kd_Temp1;
    float LR_Temp1;

    float Kp_Temp2;
    float Kd_Temp2;
    float LR_Temp2;

    float Kp_Temp3;
    float Kd_Temp3;
    float LR_Temp3;

    int16_t lastTemp, lastHumid;

  public:
    CHistory();
    
    void loadPID();
    void savePID();
    void init(int16_t lastTemp, int16_t lastHumid);
    
    inline float getKpTemperature() { return Kp_Temp1;}
    inline float getKdTemperature() { return Kd_Temp1;}
    inline float getLRTemperature() { return LR_Temp1;}
    inline float getKpHumidity() { return Kp_Humidity;}
    inline float getKdHumidity() { return Kd_Humidity;}
    inline float getLRHumidity() { return LR_Humidity;}
    inline float getKpHeater1() { return Kp_Temp1; }
    inline float getKdHeater1() { return Kd_Temp1; }
    inline float getKpMist() { return Kp_Humidity; }
    inline float getKdMist() { return Kd_Humidity; }
    
    int16_t add(STATUS_TYPE &status);
    int16_t calculateDutyForTemp1(int16_t setPoint, int16_t curTemp, int16_t lastDuty);
    int16_t calculateDutyForTemp2(int16_t setPoint, int16_t curTemp, int16_t lastDuty);
    int16_t calculateMistDuty(uint16_t setPpoint, uint16_t curHumid, int16_t lastDuty);
    inline int16_t getRingCount() { return count; };
    inline int16_t getRingSize() { return RING_SIZE; }
    inline uint8_t *getRingData1() { return (uint8_t *) &ring[tail]; }
    inline uint8_t *getRingData2() { return (uint8_t *) &ring[0]; }
    inline int16_t getRingHead() { return head; }
    inline int16_t getRingTail() { return tail; }
    
  private:
    void adjustGainsUsingGradientDescent(float &Kp, float &Kd, float currentError, uint16_t setpoint, float prevTemperature, float MAX_EXPECTED_ERROR);
};

extern CHistory history;
#endif  // CHISTORY_H