#include <Servo.h>
#include <Keypad.h>
//#include <LiquidCrystal.h>
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>


LiquidCrystal_I2C lcd(0x27,16,2);  //0x27 is the i2c address, while 16 = columns, and 2 = rows. 

#include<stdio.h>
const byte ROWS = 4; //four rows
const byte COLS = 4; //three columns
char keys[ROWS][COLS] = {
  {'1', '2', '3', '+'},
  {'4', '5', '6', '-'},
  {'7', '8', '9', '*'},
  {'.', '0', '=', '/'}
};
byte rowPins[ROWS] = {5, 4, 3, 2}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {A3, A2, A1, A0}; //connect to the column pinouts of the keypad

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

#include "RTClib.h"

RTC_DS1307 Rtc;

char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};


void setup ()
{
  lcd.init();
  lcd.backlight();
  lcd.clear();

  Rtc.begin();

}

void loop ()
{

  DateTime now = Rtc.now();
  lcd.setCursor(0, 0);
  lcd.print("Date: ");
  lcd.print(now.day());
  lcd.print("/");
  lcd.print(now.month());
  lcd.print("/");
  lcd.print(now.year());

  lcd.setCursor(0, 1);
  lcd.print("Time: ");
  lcd.print(now.hour());
  lcd.print(":");
  lcd.print(now.minute());
  lcd.print(":");
  lcd.print(now.second());

  //Set the Date and Time Manually when '*' key is pressed
  char c = keypad.getKey();
  if (c == '*') {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Enter Year: ");
    int year = getData();

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Enter Month: ");
    int month = getData();

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Enter DayOfWeek: ");
    int day = getData();

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Enter Hours: ");
    int hour = getData();

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Enter Minutes: ");
    int minute = getData();

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Enter Seconds: ");
    int second = getData();

    //DateTime newTime = (year, month, day, hour, minute, second);
    Rtc.adjust(DateTime(year, month, day, hour, minute, second));
  }
  
  //delay(500);
}

int getData() {
  String container = "";
  lcd.setCursor(0, 1);
  while (true) {
    char c = keypad.getKey();
    if (c == '/') {
      break;
    } else if (isDigit(c)) {
      container += c;
      lcd.print(c);
    } else {
      //Nothing
    }
  }
  return container.toInt();
}