#include <Keypad.h>
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#define buttonStart 13

const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns
//define the cymbols on the buttons of the keypads
char hexaKeys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] = {12, 11, 10, 9}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {8, 7, 6, 5}; //connect to the column pinouts of the keypad

//initialize an instance of class NewKeypad
Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); 

LiquidCrystal_I2C lcd(0x27, 16, 2);
byte data_count = 10;
int counter = 0;
int target = 0;
// String number = "";
int number = 0;
int memory;
char customKey;
bool switchState = false;
char keyLock = NO_KEY;

void setup(){
  Serial.begin(9600);
  
  lcd.init();   
  lcd.backlight(); 
  lcd.setCursor(0,0);
  String data  = String ("Target  = ");
  lcd.print(data + target);
  lcd.setCursor(0, 1);
  String data2 = String ("Plastik = ");
  lcd.print(data2 + counter);
  lcd.setCursor(10,0);
  pinMode(buttonStart, INPUT_PULLUP);
  
}
  
void loop(){
  updateCursor();

  char key = customKeypad.getKey();
  if (key) {
    processInput(key);
  }

  int buttonStart_State = digitalRead(buttonStart);
  if (buttonStart_State == LOW){
    switchState = true;
  } else {
    switchState = false;
  }

  if (switchState){
    if(counter>=number){
    counter=0;
    for (int i=10;i<=15;i++){
      lcd.setCursor(i,1);
      lcd.print(' ');
    }
    } else {
    counter++;
    delay(100);
    }
  }else{
    for (int ii=11;ii<=15;ii++){
      lcd.setCursor(ii,1);
      lcd.print(' ');
      if (ii == 15){
        break;
      }
    }
    counter=0;
  }
  lcd.setCursor(data_count,1);
  lcd.print(counter);
  Serial.println(counter);
}

void processInput(char key){
  
  if (key != NO_KEY){
    if (key >= '0' && key <= '9'){
      if (keyLock == NO_KEY) {
        number = (number * 10) + (key - '0');
      }
    }else if (key == 'A'){
      keyLock = key;
    }else if (key == 'B'){
      for(int i = 10; i <= 15; i++){
        lcd.setCursor(i,0);
        lcd.print(' ');
        lcd.setCursor(i,1);
        lcd.print(' ');
        if(i == 16){
          break;
        }
      }
      number = 0;
      keyLock = NO_KEY;
    }
  }

  lcd.setCursor(data_count,0);
  lcd.print(number);
  //lcd.setCursor(data_count,1);
  //lcd.print(counter);
  Serial.println("Inputan monitor :" + number);
  Serial.println("Tombol :" + key);
  // switch (key){
  //   case 'A':
  //   memory = number.toDouble();
  //   lcd.noCursor();
  //   return;
  //   case 'B':
  //   break;
  // }
  // customKey = customKeypad.getKey();
  
  // number = customKey - '0';
  //   if (customKey){
  //   Serial.print(number);
  //   lcd.setCursor(data_count, 0);
  //   lcd.print(number);
  //   data_count++;
  // }



  // if (counter>=number){
  //   counter=0;
  // }

  // if (customKey == 'A'){
  //   lcd.clear();
  //   counter=0;
  // } 
  // lcd.print(key);
}

void updateCursor() {
  if (millis() / 250 % 2 == 0 ) {
    lcd.cursor();
  } else {
    lcd.noCursor();
  }
}