#include <SevSeg.h>
#include<Keypad.h>

SevSeg sevseg;

const uint8_t ROWS = 4;
const uint8_t COLS = 3;
char keys[ROWS][COLS] = {
  { '1', '2', '3'},
  { '4', '5', '6'},
  { '7', '8', '9'},
  { '*', '0', '#'}};
uint8_t colPins[COLS] = { 13, 12, 11};
uint8_t rowPins[ROWS] = { 10,9,8,7,};
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS,COLS);

int code[4] = {1,1,1,1};
int startCode[4] = {1,1,1,1},goodCode[4] = {3,2,9,1};

int realArraySize(int arr[]);
void setArr(int arr1[], int arr2[]);
void displayArr(int arr[]);

void setup() {
setSevSeg();
}

void loop() {
    char key = keypad.getKey();

  if (key != NO_KEY) 
  {
     if (key == '#') 
     {
      setArr(code,startCode);
      sevseg.setNumber(1111);
     }
     else if (key == '*' && code == goodCode)
     sevseg.setNumber(9999);
     else
     {
      code[realArraySize(code)] = (int)key;
      sevseg.setNumber(code[0] + code[1] *10 + code[2]*100 + code[3]*1000);
     }
  }
  //sevseg.setNumber(5206);
  sevseg.refreshDisplay(); 
}

int realArraySize(int arr[])
{
  for (int i = 0; i < sizeof(arr); i++)
  {
    if (arr[i] != -1) return i;
  }
  return sizeof(arr) - 1;
}

void setArr(int arr1[], int arr2[])
{
  for (int i = 0; i < sizeof(arr1); i++)
  {
    arr1[i] = arr2[i];
  }
}

void setSevSeg()
{
  byte numDigits = 4;
  byte digitPins[] = {22, 23, 24, 25};
  byte segmentPins[] = {26, 27, 28, 29, 30, 31, 32, 33};
  bool resistorsOnSegments = false;
  byte hardwareConfig = COMMON_ANODE;
  bool updateWithDelays = false;
  bool leadingZeros = false;
  bool disableDecPoint = false;

  sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments,
  updateWithDelays, leadingZeros, disableDecPoint);
  sevseg.setBrightness(90);
}

class code
{
  private:
  int first,second,third,fourth;

  public:
  void setCode(int firstA,int secondA,int thirdA,int fourthA)
  {
    first = firstA;
    second = secondA;
    third = thirdA;
    fourth = fourthA;
  }
  
  int getFirst(){return first;}
  int getSecond(){return second;}
  int getThird(){return third;}
  int getFourth(){return fourth;}

};