#pragma once
//
//    FILE: pressure.h
//  AUTHOR: Rob Tillaart
// VERSION: 0.2.2
// PURPOSE: Arduino library for pressure conversion
//     URL: https://github.com/RobTillaart/pressure



#define PRESSURE_LIB_VERSION        (F("0.2.2"))


//  CONSTANTS NEED TO BE VERIFIED
//  Temperature 25°C ?

// CONSTANTS SETTERS
#define BAR2MILLIBAR           1000
#define ATM2MILLIBAR           1013.25
#define PSI2MILLIBAR           68.9475729318
#define DYNES2MILLIBAR         0.001
#define INHG2MILLIBAR          33.85355
#define INH2O2MILLIBAR         2.4908890833333
#define PASCAL2MILLIBAR        0.01
#define TORR2MILLIBAR          1.33322368
#define CMHG2MILLIBAR          13.3322368
#define CMH2O2MILLIBAR         0.980665
#define MSW2MILLIBAR           0.01

// CONSTANTS GETTERS
#define MILLIBAR2BAR           0.001
#define MILLIBAR2ATM           9.86923267e-4
#define MILLIBAR2PSI           0.0145037738
#define MILLIBAR2DYNES         1000
#define MILLIBAR2INHG          2.9539e-2
#define MILLIBAR2INH2O         0.40146307866177
#define MILLIBAR2PASCAL        100
#define MILLIBAR2TORR          0.750061683
#define MILLIBAR2CMHG          0.0750061683
#define MILLIBAR2CMH2O         1.0197162129779 
#define MILLIBAR2MSW           100


class pressure
{
public:
  //  CONSTRUCTOR
  pressure(float value = 0.0)     { _pressure = value; };


  void  setMilliBar(float value)  { _pressure = value; };
  void  setBar(float value)       { _pressure = value * BAR2MILLIBAR; };
  void  setPSI(float value)       { _pressure = value * PSI2MILLIBAR; };
  void  setATM(float value)       { _pressure = value * ATM2MILLIBAR; }
  void  setDynes(float value)     { _pressure = value * DYNES2MILLIBAR; }
  void  setInchHg(float value)    { _pressure = value * INHG2MILLIBAR; }
  void  setInchH2O(float value)   { _pressure = value * INH2O2MILLIBAR; }
  void  setPascal(float value)    { _pressure = value * PASCAL2MILLIBAR; }
  void  setTORR(float value)      { _pressure = value * TORR2MILLIBAR; }
  void  setCmHg(float value)      { _pressure = value * CMHG2MILLIBAR; }
  void  setCmH2O(float value)     { _pressure = value * CMH2O2MILLIBAR; }
  void  setMSW(float value)       { _pressure = value * MSW2MILLIBAR; }


  float getMilliBar()  { return _pressure; };
  float getBar()       { return _pressure * MILLIBAR2BAR; };
  float getPSI()       { return _pressure * MILLIBAR2PSI; };
  float getATM()       { return _pressure * MILLIBAR2ATM; }
  float getDynes()     { return _pressure * MILLIBAR2DYNES; }
  float getInchHg()    { return _pressure * MILLIBAR2INHG; }
  float getInchH2O()   { return _pressure * MILLIBAR2INH2O; }
  float getPascal()    { return _pressure * MILLIBAR2PASCAL; }
  float getTORR()      { return _pressure * MILLIBAR2TORR; }
  float getCmHg()      { return _pressure * MILLIBAR2CMHG; }
  float getCmH2O()     { return _pressure * MILLIBAR2CMH2O; }
  float getMSW()       { return _pressure * MILLIBAR2MSW; }


  //  EXPERIMENTAL
  //  temperature in KELVIN !
  void change(float T1, float T2, float V1, float V2, float N1, float N2)
  {
    changeT(T1, T2);
    changeV(V1, V2);
    changeN(N1, N2);
  }

  //  temperature in KELVIN!
  void changeT(float T1, float T2)
  {
    if ((T1 != T2) && (T1 > 0) && (T2 > 0)) _pressure *= (T2 / T1);
  }


  void changeV(float V1, float V2)
  {
    if ((V1 != V2) && (V1 > 0) && (V2 > 0)) _pressure *= (V1 / V2);
  }


  void changeN(float N1, float N2)
  {
    if ((N1 != N2) && (N1 > 0) && (N2 > 0)) _pressure *= (N2 / N1);
  }


private:
  float    _pressure;    //  millibar.
};


// -- END OF FILE --