#include <DHT.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
  
#define ldrPin A0
#define pirPin 2
#define buttonPin 3
#define ledLamp 4
#define ledFan 5
#define ledAlarm 6
#define buzzer 7
#define DHTPIN 8   
#define DHTTYPE DHT22

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

bool manualMode = false;
bool lampManual = false;

int displayIndex = 0;
unsigned long lastDisplay = 0;

void setup() {

  pinMode(pirPin, INPUT);
  pinMode(buttonPin, INPUT_PULLUP);

  pinMode(ledLamp, OUTPUT);
  pinMode(ledFan, OUTPUT);
  pinMode(ledAlarm, OUTPUT);
  pinMode(buzzer, OUTPUT);

  Serial.begin(9600);

  dht.begin();

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

void loop() {

  int cahaya = analogRead(ldrPin);
  int gerakan = digitalRead(pirPin);
  int tombol = digitalRead(buttonPin);

  float suhu = dht.readTemperature();
  float lembab = dht.readHumidity();


  //Logika Sistem 

  if (tombol == LOW) {
    manualMode = !manualMode;
    delay(300);
  }


  // Logika A Dan E

  if (manualMode) {

    if (tombol == LOW) {
      lampManual = !lampManual;
      digitalWrite(ledLamp, lampManual);
      delay(300);
    }

  } else {

    if (cahaya < 500 && gerakan == HIGH) {
      digitalWrite(ledLamp, HIGH);
    } else {
      digitalWrite(ledLamp, LOW);
    }

  }


  // LOGIKA B

  if (suhu > 30) {
    digitalWrite(ledFan, HIGH);
  } else {
    digitalWrite(ledFan, LOW);
  }


  // LOGIKA C

    if (suhu > 35) {

    digitalWrite(ledAlarm, HIGH); // LED merah
    digitalWrite(ledFan, LOW);    // LED biru mati
    tone(buzzer, 1000);

  }

  else if (suhu > 30) {

    digitalWrite(ledFan, HIGH);   // LED biru
    digitalWrite(ledAlarm, LOW);  // LED merah mati
    noTone(buzzer);

  }

  else {

    digitalWrite(ledFan, LOW);
    digitalWrite(ledAlarm, LOW);
    noTone(buzzer);

  }


  // LOGIKA D Part Tampilan Cek Cahaya, Suhu, Dan Kelembapan

  Serial.print("Cahaya: ");
  Serial.print(cahaya);
  Serial.print("  Suhu: ");
  Serial.print(suhu);
  Serial.print("  Hum: ");
  Serial.println(lembab);


  // LOGIKA D Part LCD DISPLAY BERGANTIAN

  if (millis() - lastDisplay > 3000) {

    lcd.clear();

    if (displayIndex == 0) {
      lcd.setCursor(0,0);
      lcd.print("Suhu:");
      lcd.print(suhu);
      lcd.print("C");
    }

    else if (displayIndex == 1) {
      lcd.setCursor(0,0);
      lcd.print("Kelembaban:");
      lcd.setCursor(0,1);
      lcd.print(lembab);
      lcd.print("%");
    }

    else if (displayIndex == 2) {
      lcd.setCursor(0,0);
      lcd.print("Lampu:");
      if (digitalRead(ledLamp)) {
        lcd.print("ON");
      } else {
        lcd.print("OFF");
      }
    }

    else if (displayIndex == 3) {
      lcd.setCursor(0,0);
      lcd.print("Kipas:");
      if (digitalRead(ledFan)) {
        lcd.print("ON");
      } else {
        lcd.print("OFF");
      }
    }

    else if (displayIndex == 4) {
      lcd.setCursor(0,0);
      lcd.print("Status:");
      if (gerakan == HIGH) {
        lcd.print("Ada Orang");
      } else {
        lcd.print("Kosong");
      }
    }

    displayIndex++;

    if (displayIndex > 4) {
      displayIndex = 0;
    }

    lastDisplay = millis();
  }

}