#define sw1 3
#define sw2 2
#define sw3 4
#define sw4 5

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

//button
int up, down, enter, back;

// menu
int menu = 0;
int mode = 0;
int setting = 0;

// sub menu
int CountDown = 0;
int LedLcd = 0;
int Buzzer = 0;

// Untuk Menyimpan Suatu Data
int dataCountDown = 1;
int dataLedLcd = 1;
int dataBuzzer = 1;

void setup() {
  pinMode(sw1, INPUT_PULLUP);
  pinMode(sw2, INPUT_PULLUP);
  pinMode(sw3, INPUT_PULLUP);
  pinMode(sw4, INPUT_PULLUP);

  lcd.init();
  lcd.backlight();

}

void loop() {
  tombolMenu();

  while (mode >= 1) {
    tombolMode();
    while (CountDown >= 1) {
      tombolCountDown();
      tampilCountDown();
    }
    tampilMode();
  }

  while (setting >= 1) {
    tombolSetting();
    while(LedLcd >= 1) {
      tombolLedLcd();
      tampilLedLcd();
    }
    while(Buzzer >= 1) {
      tombolBuzzer();
      tampilBuzzer();
    }

    tampilSetting();
  }

  tampilMenu();
}

//==============TOMBOL==============
void tombolMenu() {
  down = digitalRead(sw1);
  up = digitalRead(sw2);
  enter = digitalRead(sw3);

  if (up == 0)
  {
    delay(200);
    menu++;
    lcd.clear();
  }

  if (up == 0 && menu >= 5)
  {
    menu = 0;
  }

  if (down == 0)
  {
    delay(200);
    menu--;
    lcd.clear();
  }

  if (down == 0 && menu < 0)
  {
    menu = 4;
  }

  if (enter == 0 && menu == 3)
  {
    delay(200);
    mode++;
    lcd.clear();
  }

  if (enter == 0 && menu == 4)
  {
    delay(200);
    setting++;
    lcd.clear();
  }


}

void tombolMode() {
  down = digitalRead(sw1);
  up = digitalRead(sw2);
  enter = digitalRead(sw3);
  back = digitalRead(sw4);

  if (up == 0)
  {
    delay(200);
    mode++;
    lcd.clear();
  }

  if (up == 0 && mode >= 3)
  {
    mode = 1;
  }

  if (down == 0)
  {
    delay(200);
    mode--;
    lcd.clear();
  }

  if (down == 0 && mode < 1)
  {
    mode = 2;
  }

  if (back == 0) {
    delay(200);
    mode = mode - mode;
    lcd.clear();
    menu = 3;
    tampilMenu();
  }

  // Menuju ke sub menu
  if (enter == 0 && mode == 2)
  {
    delay(200);
    CountDown++;
    lcd.clear();
  }
}

void tombolSetting() {
  down = digitalRead(sw1);
  up = digitalRead(sw2);
  enter = digitalRead(sw3);
  back = digitalRead(sw4);

  if (up == 0)
  {
    delay(200);
    setting++;
    lcd.clear();
  }

  if (up == 0 && setting >= 3)
  {
    setting = 1;
  }

  if (down == 0)
  {
    delay(200);
    setting--;
    lcd.clear();
  }

  if (down == 0 && setting < 1)
  {
    setting = 2;
  }

  if (back == 0) {
    delay(200);
    setting = setting - setting;
    lcd.clear();
    menu = 4;
    tampilMenu();
  }

  // Menuju ke sub menu
  if (enter == 0 && setting == 1)
  {
    delay(200);
    LedLcd++;
    lcd.clear();
  }

  if (enter == 0 && setting == 1)
  {
    delay(200);
    LedLcd++;
    lcd.clear();
  }
  if (enter == 0 && setting == 2)
  {
    delay(200);
    Buzzer++;
    lcd.clear();
  }
}

//==========TOMBOL SUB MENU==========
void tombolCountDown() {
  down = digitalRead(sw1);
  up = digitalRead(sw2);
  enter = digitalRead(sw3);
  back = digitalRead(sw4);

  if (up == 0)
  {
    delay(200);
    dataCountDown++;
    lcd.clear();
  }

  if (up == 0 && dataCountDown >= 3)
  {
    dataCountDown = 1;
  }

  if (down == 0)
  {
    delay(200);
    dataCountDown--;
    lcd.clear();
  }

  if (down == 0 && dataCountDown < 1)
  {
    dataCountDown = 2;
  }

  if (back == 0) {
    delay(200);
    CountDown = CountDown - CountDown;
    mode = 2;
  }
}

void tombolLedLcd() {
  down = digitalRead(sw1);
  up = digitalRead(sw2);
  enter = digitalRead(sw3);
  back = digitalRead(sw4);

  if (up == 0)
  {
    delay(200);
    dataLedLcd++;
    lcd.clear();
  }

  if (up == 0 && dataLedLcd >= 3)
  {
    dataLedLcd = 1;
  }

  if (down == 0)
  {
    delay(200);
    dataLedLcd--;
    lcd.clear();
  }

  if (down == 0 && dataLedLcd < 1)
  {
    dataLedLcd = 2;
  }

  if (back == 0) {
    delay(200);
    LedLcd = LedLcd - LedLcd;
    setting = 1;
  }
}

void tombolBuzzer() {
  down = digitalRead(sw1);
  up = digitalRead(sw2);
  enter = digitalRead(sw3);
  back = digitalRead(sw4);

  if (up == 0)
  {
    delay(200);
    dataBuzzer++;
    lcd.clear();
  }

  if (up == 0 && dataBuzzer >= 3)
  {
    dataBuzzer = 1;
  }

  if (down == 0)
  {
    delay(200);
    dataBuzzer--;
    lcd.clear();
  }

  if (down == 0 && dataBuzzer < 1)
  {
    dataBuzzer = 2;
  }

  if (back == 0) {
    delay(200);
    Buzzer = Buzzer - Buzzer;
    setting = 2;
  }
}



//==============TAMPILAN==============
void tampilMenu() {

  if (menu == 0) {
    lcd.setCursor(0, 0);
    lcd.print("-> 0.START     ");
    lcd.setCursor(0, 1);
    lcd.print("   1.STOP      ");

  } else if (menu == 1) {
    lcd.setCursor(0, 0);
    lcd.print("   0.START     ");
    lcd.setCursor(0, 1);
    lcd.print("-> 1.STOP      ");

  } else if (menu == 2) {
    lcd.setCursor(0, 0);
    lcd.print("-> 2.RESET     ");
    lcd.setCursor(0, 1);
    lcd.print("   3.MODE      ");

  } else if (menu == 3) {
    lcd.setCursor(0, 0);
    lcd.print("   2.RESET     ");
    lcd.setCursor(0, 1);
    lcd.print("-> 3.MODE      ");

  } else if (menu == 4) {
    lcd.setCursor(0, 0);
    lcd.print("-> 4.SETTING   ");
  }
}

void tampilMode() {
  if (mode == 1) {
    lcd.setCursor(0, 0);
    lcd.print("-> 1.STOP WATCH     ");
    lcd.setCursor(0, 1);
    lcd.print("   2.COUNT DOWN     ");

  } else if (mode == 2) {
    lcd.setCursor(0, 0);
    lcd.print("   1.STOP WATCH     ");
    lcd.setCursor(0, 1);
    lcd.print("-> 2.COUNT DOWN     ");
  }
}

void tampilSetting() {
  if (setting == 1) {
    lcd.setCursor(0, 0);
    lcd.print("-> 1.LED LCD     ");
    lcd.setCursor(0, 1);
    lcd.print("   2.BUZZER      ");

  } else if (setting == 2) {
    lcd.setCursor(0, 0);
    lcd.print("   1.LED LCD     ");
    lcd.setCursor(0, 1);
    lcd.print("-> 2.BUZZER      ");
  }
}

//==========TAMPIL SUB MENU==========
void tampilCountDown() {
  if (dataCountDown == 1) {
    lcd.setCursor(0, 0);
    lcd.print("-> 1.30 Detik     ");
    lcd.setCursor(0, 1);
    lcd.print("   2. 1 Menit     ");

  } else if (dataCountDown == 2) {
    lcd.setCursor(0, 0);
    lcd.print("   1.30 Detik     ");
    lcd.setCursor(0, 1);
    lcd.print("-> 2. 1 Menit     ");
  }
}

void tampilLedLcd() {
  if (dataLedLcd == 1) {
    lcd.setCursor(0, 0);
    lcd.print("LED LCD :-> OFF  ");
    lcd.setCursor(0, 1);
    lcd.print("            ON   ");

  } else if (dataLedLcd == 2) {
    lcd.setCursor(0, 0);
    lcd.print("LED LCD :   OFF  ");
    lcd.setCursor(0, 1);
    lcd.print("         -> ON   ");
  }
}

void tampilBuzzer() {
  if (dataBuzzer == 1) {
    lcd.setCursor(0, 0);
    lcd.print("BUZZER  :-> OFF  ");
    lcd.setCursor(0, 1);
    lcd.print("            ON   ");

  } else if (dataBuzzer == 2) {
    lcd.setCursor(0, 0);
    lcd.print("BUZZER  :   OFF  ");
    lcd.setCursor(0, 1);
    lcd.print("         -> ON   ");
  }
}