#pragma once

#include <Arduino.h>
#include <Wire.h>
#include "MyFRAM_I2C.h"

namespace MY_FRAMCONTROL
{ 
    consteval uint32_t sizeofObject (const auto &data) { return sizeof(data); }
    consteval uint32_t lengthStructure (const auto &data, const size_t N) { return sizeofObject(data)/N; }
    constinit uint8_t TWI_BUFFER_SIZE {BUFFER_LENGTH-2}; // 'BUFFER_LENGTH' in twi.h abzüglich 2 Bytes Speicherzellenadressierung
}

/*                I2C Addr
                  |                 wire0/wire1  
                  |                 |              Capacity in kBit       
                  |                 |              |                 Object for length determination etc.                 
                  |                 |              |                 |               initial address of object in FRAM
                  |                 |              |                 |               |                              */
template <uint8_t i2cAddr, TwoWire& line, uint16_t memorySize, auto &myObj, uint32_t initObjAddr>  
class MyFramControl { };  // allg. Template

template <uint8_t i2cAddr, TwoWire& line, uint16_t memorySize, typename T, T(&myObj), uint32_t initObjAddr> 
class MyFramControl <i2cAddr, line, memorySize, myObj, initObjAddr>  // non array Template Spezialisierung

template <uint8_t i2cAddr, TwoWire& line, uint16_t memorySize, typename T, size_t N, T(&myObj)[N], uint32_t initObjAddr> 
class MyFramControl <i2cAddr, line, memorySize, myObj, initObjAddr>  // array Template Spezialisierung
{
  static_assert((10<=BUFFER_LENGTH), "TWI buffer size smaller than 10 is possible but not practical, Wire src twi.h" );
  static_assert(((initObjAddr+sizeof(myObj)) < (1024UL*memorySize/8)), "Object to large or Addr to high" );
  private:  
    MyFRAM_I2C <i2cAddr, line, memorySize> fram;
   
    uint32_t calcMemberAddr (const uint32_t objStartIndex, const uint32_t memberOffset) {
      using namespace MY_FRAMCONTROL;
      return initObjAddr + (objStartIndex*lengthStructure(myObj,N)) + memberOffset;
    }
    
  public:
    MyFramControl() = default;
      
    void readTo (T(&otherObj)[N]) { fram.read(initObjAddr, otherObj); }  
};