#include <LiquidCrystal.h>

const int rs = 7;   // Pin 7  on Arduino to pin 4  (RS) on LCD
const int en = 6;   // Pin 6  on Arduino to pin 6  (E)  on LCD
const int d4 = 12;  // Pin 12 on Arduino to pin 11 (D4) on LCD
const int d5 = 10;  // Pin 10 on Arduino to pin 12 (D5) on LCD
const int d6 = 9;   // Pin 9  on Arduino to pin 13 (D6) on LCD
const int d7 = 8;   // Pin 8  on Arduino to pin 14 (D7) on LCD

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

int currentMenuItem = 0;
int lastState = 0;
int up = A3;
int down = A4;
int enter = A5;

void setup() {
  pinMode(up, INPUT_PULLUP);
  pinMode(down, INPUT_PULLUP);
  pinMode(enter, INPUT_PULLUP);
  lcd.begin(16, 2);
  lcd.setCursor(0,0);
  lcd.print("LCD MENU DENGAN");
  lcd.setCursor(0,1);
  lcd.print("PUSH BUTTON");
  delay(5000);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("PILIH PRODI ANDA");
  lcd.setCursor(0,1);
  lcd.print("TEKAN DOWN");
}

void loop() {
  mainmenu();
}

void mainmenu(){
  int state = 0;
  if (digitalRead(up) == LOW){
    state = 1; 
  }
  else if(digitalRead(down) == LOW){
    state = 2;
  }
  else if(digitalRead(enter) == LOW){
    state = 3;
  }
  if (currentMenuItem < 0 || currentMenuItem > 5){
    currentMenuItem = 0;
  }
  if (state != lastState) {
    if (state ==1 ){
      currentMenuItem = currentMenuItem - 1;
      displayMenu(currentMenuItem);\
    }
    else if (state == 2){
      currentMenuItem = currentMenuItem + 1;
      displayMenu(currentMenuItem);
    }
    else if (state == 3){
      selectMenu(currentMenuItem);
    }
    lastState = state;
  }
  delay(5);
}

void displayMenu(int x){
  switch(x){
    case 1:
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("*FARMASI");
      lcd.setCursor(0,1);
      lcd.print(" FISIO");
      break;
    case 2:
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print(" FARMASI");
      lcd.setCursor(0,1);
      lcd.print("*FISIO");
      break;
    case 3:
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("*TEM");
      lcd.setCursor(0,1);
      lcd.print("ANKES");
      break;
    case 4:
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("TEM");
      lcd.setCursor(0,1);
      lcd.print("*ANKES");
      break;
    case 5:
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("ANKES");
      lcd.setCursor(0,1);
      lcd.print("*RMIK");
      break;
  }
}

void selectMenu(int x){
  switch(x){
    case 1:
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("SELAMAT");
      lcd.setCursor(0,1);
      lcd.print("ANDA MEMILIH FARMASI");
      break;
    case 2:
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("SELAMAT");
      lcd.setCursor(0,1);
      lcd.print("ANDA MEMILIH FISIO");
      break;
    case 3:
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("SELAMAT");
      lcd.setCursor(0,1);
      lcd.print("ANDA MEMILIH TEM");
      break;
    case 4:
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("SELAMAT");
      lcd.setCursor(0,1);
      lcd.print("ANDA MEMILIH TEM");
      break;
    case 5:
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("SELAMAT");
      lcd.setCursor(0,1);
      lcd.print("ANDA MEMILIH RMIK");
      break;
  }
}