/**
   Arduino Calculator

   Copyright (C) 2020, Uri Shaked.
   Released under the MIT License.
*/
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#include <RTClib.h> 

LiquidCrystal_I2C lcd1(0x27, 20, 4);
LiquidCrystal_I2C lcd2(0x26, 20, 4);

RTC_DS1307 rtc;

volatile int coinReceived = 0;
volatile int verification = 0;
bool tv1Ready = true;
bool tv2Ready = true;
bool tv3Ready = true;
bool tv4Ready = true;
bool tv5Ready = true;
bool tv6Ready = true;
bool tv7Ready = true;
bool tv8Ready = true;

int tanggal, bulan, tahun, jam, menit, detik;


/* Keypad setup */
const byte KEYPAD_ROWS = 4;
const byte KEYPAD_COLS = 4;
byte rowPins[KEYPAD_ROWS] = {5, 4, 1, 0};
byte colPins[KEYPAD_COLS] = {A3, A2, A1, A0};
char keys[KEYPAD_ROWS][KEYPAD_COLS] = {
  {'1', '2', '3', '+'},
  {'4', '5', '6', '-'},
  {'7', '8', '9', '*'},
  {'.', '0', '=', '/'}
};

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, KEYPAD_ROWS, KEYPAD_COLS);

void setup() {
  attachInterrupt(0,incomingImpuls, FALLING);

  for (int i = 6; i<=13; i++) {
    pinMode(i, OUTPUT);
  }
  for (int i = 6; i<=13; i++) {
    digitalWrite(i, LOW);
  }
  lcd1.init();
  lcd1.backlight();
  while (! rtc.begin()) {    
    lcd1.setCursor(0, 1);                     
    lcd1.print("RTC Tidak Ditemukan");                                           
  }
  
  lcd1.setCursor(0, 0);
  lcd1.print("Selamat datang");
  lcd1.setCursor(0, 1);
  lcd1.print("Silakan masukkan ");
  delay(500);
  lcd1.clear();
}

void getTime() {
  DateTime now = rtc.now();                                    //Data hari
  tanggal = now.day();                                                          //Data tanggal
  bulan   = now.month();                                                        //Data bulan
  tahun   = now.year();                                                         //Data tahun
  jam     = now.hour();                                                         //Data jam
  menit   = now.minute();                                                       //Data menit
  detik   = now.second(); 
}

void incomingImpuls() {
  coinReceived++;
  verification = 1;
}

void menuInsertDuration() {

}

void loop() {
  getTime();
  mainMenu();
  if (verification == 1) {
    menuInsertDuration();
  }

  char key = keypad.getKey();
  if (key) {
    lcd1.setCursor(19, 3);
    lcd1.print(key);
  }
  delay(500);
}


void mainMenu() {
  //lcd1.clear();
  lcd1.setCursor(1,0);
  lcd1.print("-TIMER-");
  lcd1.setCursor(12,0);
  lcd1.print("-TIMER-");
  lcd1.setCursor(0,1);
  lcd1.print("TV1:");
  lcd1.setCursor(11,1);
  lcd1.print("TV2:");
  lcd1.setCursor(1,0);
  lcd1.print("-TIMER-");
  lcd1.setCursor(12,0);
  lcd1.print("-TIMER-");
  lcd1.setCursor(0,1);
  lcd1.print("TV1:");
  lcd1.setCursor(11,1);
  lcd1.print("TV2:");
}