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

#define DHTType DHT22
LiquidCrystal_I2C lcd(0x27, 16, 2);

const int baris = 4;
const int kolom = 4;
String inputkey = "";
String savedkey = "2005";
bool Keymatch = false;
bool roomSelected = false;
int dhtpin1 = 15; 
int dhtpin2 = 14; 

DHT dht1(dhtpin1, DHTType);
DHT dht2(dhtpin2, DHTType);

unsigned long previousMillis = 0;
const long interval = 500;

char keys[baris][kolom] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte PinBaris[baris] = {19, 18, 5, 17};
byte PinKolom[kolom] = {16, 4, 0, 2};

Keypad keypad = Keypad(makeKeymap(keys), PinBaris, PinKolom, baris, kolom);

enum Room { ROOM_A, ROOM_B }; 

Room currentRoom = ROOM_A; 

void setup() {
  dht1.begin();
  dht2.begin();
  welcome();
  lcd.setCursor(0, 0);
  lcd.print("input PIN: ");
  Serial.begin(115200);
}

void loop() {
  unsigned long currentMillis = millis();
  char key = keypad.getKey();
  if (key != NO_KEY && !Keymatch) {
    if (key == 'D') { 
      if (inputkey == savedkey) {
        lcd.clear();
        lcd.print("   PIN Benar!");
        Keymatch = true;
        delay(2000);
        lcd.clear();
        running();
        previousMillis = currentMillis;
      } else {
        lcd.clear();
        lcd.print("   PIN Salah!");
        delay(2000);
        lcd.clear();
        lcd.print("input PIN: ");
        inputkey = "";
      }
    } else if (key == 'C') {
      if (inputkey.length() > 0) {
        inputkey.remove(inputkey.length() - 1);
        lcd.setCursor(11, 0);
        lcd.print(inputkey);
        lcd.print(" ");
        lcd.setCursor(11, 0);
      }
    } else {
      inputkey = inputkey + key;
      lcd.setCursor(11, 0);
      lcd.print(inputkey);
    }
  }
  if (Keymatch && currentMillis - previousMillis >= interval && roomSelected) {
    if (currentRoom == ROOM_A) {
      dhtsensor(ROOM_A);
    } else {
      dhtsensor(ROOM_B);
    }
    previousMillis = currentMillis;
  }
  
  if (Keymatch && key == 'A') {
    currentRoom = ROOM_A;
    lcd.clear();
    lcd.print("    ROOM A:");
    roomSelected = true;
    delay(2000);
    lcd.clear();
    dhtsensor(ROOM_A);
  }
  
  if (Keymatch && key == 'B') {
    currentRoom = ROOM_B;
    lcd.clear();
    lcd.print("    ROOM B:");
    roomSelected = true;
    delay(2000);
    lcd.clear();
    dhtsensor(ROOM_B);
  }
}

void welcome() {
  lcd.init();
  lcd.backlight();
  lcd.setCursor(1, 0);
  lcd.print("WOKWI PROJECT");
  lcd.setCursor(4, 1);
  lcd.print("TUGAS 6");
  delay(3000);
  lcd.clear();
}

void running() {
  lcd.setCursor(20, 0);
  lcd.print("MONITORING");
  lcd.setCursor(23, 1);
  lcd.print("DHT22");
  for (int i = 0; i < 32; i++) {
    lcd.scrollDisplayLeft();
    delay(200);
  }
  lcd.clear();
  if (!roomSelected) {
    lcd.setCursor(3, 0);
    lcd.print("Pilih Room:");
    lcd.setCursor(1, 1);
    lcd.print(" A   ATAU   B");
  }
  delay(3000);
}

void dhtsensor(Room room) {
  float t, h;
  if (room == ROOM_A) {
    t = dht1.readTemperature();
    h = dht1.readHumidity();
  } else {
    t = dht2.readTemperature();
    h = dht2.readHumidity();
  }
  lcd.setCursor(0, 0);
  lcd.print("Temp :" + String(t) + "'C");
  lcd.setCursor(0, 1);
  lcd.print("Hum  :" + String(h)+" %");
}