#include <LiquidCrystal_I2C.h>
#include "DHT.h"

// ========== KONFIGURASI PIN ==========
#define pinButton1 33
#define pinButton2 25
#define DHTPIN     23
#define DHTTYPE    DHT22

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

// ========== VARIABEL ==========
int button1 = 0;
int button2 = 0;

int menu = 0;
int masukMenu = 0;
bool k1 = 0;
bool k2 = 0;
int lastMenu = -1;

int Temp = 0;
int Humd = 0;
String Status_Read_Sensor = "";

// ========== FUNGSI ==========
void bacaDHT22() {
  Humd = dht.readHumidity();
  Temp = dht.readTemperature();

  if (isnan(Humd) || isnan(Temp)) {
    Status_Read_Sensor = "Failed";
    Temp = 0;
    Humd = 0;
  } else {
    Status_Read_Sensor = "Success";
  }

  Serial.print("Status: ");
  Serial.print(Status_Read_Sensor);
  Serial.print(" | Temp: ");
  Serial.print(Temp);
  Serial.print(" | Humd: ");
  Serial.println(Humd);
}

// ========== SETUP ==========
void setup() {
  pinMode(pinButton1, INPUT);
  pinMode(pinButton2, INPUT);
  Serial.begin(115200);

  dht.begin();
  lcd.init();
  lcd.backlight();
  lcd.clear();

  lcd.setCursor(0, 0);
  lcd.print("SMKN 39 JAKARTA");
  lcd.setCursor(0, 1);
  lcd.print("XI TAV 1");
  delay(2000);
  
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("KAYLA AURA AGUSTIN");
  lcd.setCursor(0, 1);
  lcd.print("0075519291");
  delay(2000);
  lcd.clear();
}

// ========== LOOP ==========
void loop() {
  button1 = digitalRead(pinButton1);
  button2 = digitalRead(pinButton2);

  // Tombol 1 = pindah menu
  if (button1 == 1 && k1 == 0) k1 = 1;
  if (button1 == 0 && k1 == 1) {
    menu++;
    if (menu > 1) menu = 0;
    k1 = 0;
    delay(100);
  }

  // Tombol 2 = pilih menu
  if (button2 == 1 && k2 == 0) k2 = 1;
  if (button2 == 0 && k2 == 1) {
    masukMenu = menu + 1; // 1 untuk Temp, 2 untuk Humidity
    k2 = 0;
    delay(100);
  }

  // Tampilan menu utama
  if (masukMenu == 0 && menu != lastMenu) {
    lastMenu = menu;
    lcd.clear();
    if (menu == 0) {
      lcd.setCursor(0, 0); 
      lcd.print("> Temperatur");
      lcd.setCursor(0, 1); 
      lcd.print("  Humidity");
    } else {
      lcd.setCursor(0, 0); 
      lcd.print("  Temperatur");
      lcd.setCursor(0, 1); 
      lcd.print("> Humidity");
    }
  }

  // Tampilan menu Temperatur
  if (masukMenu == 1) {
    bacaDHT22();
    lcd.clear();
    lcd.setCursor(0, 0); 
    lcd.print("Temperature:");
    lcd.setCursor(0, 1); 
    lcd.print(Temp); lcd.print("°C");
    delay(2000);
    masukMenu = 0;
    lastMenu = -1;
    lcd.clear();
  }

  // Tampilan menu Humidity
  if (masukMenu == 2) {
    bacaDHT22();
    lcd.clear();
    lcd.setCursor(0, 0); 
    lcd.print("Humidity:");
    lcd.setCursor(0, 1); 
    lcd.print(Humd); lcd.print(" %");
    delay(2000);
    masukMenu = 0;
    lastMenu = -1;
    lcd.clear();
  }
}