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

#define DHT_PIN 5
#define BUZZER_PIN 7
#define redLED_PIN 6
#define greenLED_PIN 4
#define Relay_PIN 8
#define yellowLED_PIN 9

#define DHTTYPE DHT22

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

void setup() {
  Serial.begin(9600);
  Serial.println("DHT Initialized ");

  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(redLED_PIN, OUTPUT);
  pinMode(greenLED_PIN, OUTPUT);
  pinMode(Relay_PIN, OUTPUT);
  pinMode(yellowLED_PIN, OUTPUT);

  dht.begin();

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

void loop() {
  // Phase 1: Checking
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Checking");

  for (int i = 0; i < 4; ++i) {
    lcd.print('.');
    delay(500);
  }

  // Phase 2: Humidity and Temperature
  float Humidity = dht.readHumidity();
  float Temperature = dht.readTemperature();

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Humidity: ");
  lcd.print(Humidity);
  lcd.print("%");

  lcd.setCursor(0, 1);
  lcd.print("Temperature: ");
  lcd.print(Temperature);
  lcd.print("C");

  delay(2000);

  // Existing if-else conditions from the original code
  if (Humidity > 70 && Temperature > 30) {
    Serial.println("Status: High Temp & Hum");
    digitalWrite(redLED_PIN, LOW);
    digitalWrite(greenLED_PIN, LOW);
    digitalWrite(yellowLED_PIN, HIGH);
    digitalWrite(Relay_PIN, HIGH);

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Humidity: ");
    lcd.print(Humidity);
    lcd.print("%");

    lcd.setCursor(0, 1);
    lcd.print("Temperature: ");
    lcd.print(Temperature);
    lcd.print("C");

    lcd.setCursor(0, 2);
    lcd.print("Emergency!");

    delay(500);  // Reduced delay within the high temp & hum block

    for (int i = 0; i < 10; ++i) {
      digitalWrite(yellowLED_PIN, HIGH);
      tone(BUZZER_PIN, 1500, 50);
      delay(100);
      digitalWrite(yellowLED_PIN, LOW);
      tone(BUZZER_PIN, 1000, 50);
      delay(100);
    }
  } else if (Humidity < 30 && Temperature < 20) {
    Serial.println("Status: Low Temp & Hum");
    digitalWrite(redLED_PIN, LOW);
    digitalWrite(greenLED_PIN, HIGH);
    digitalWrite(yellowLED_PIN, LOW);
    digitalWrite(Relay_PIN, LOW);
    tone(BUZZER_PIN, 1500, 200);

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Humidity: ");
    lcd.print(Humidity);
    lcd.print("%");

    lcd.setCursor(0, 1);
    lcd.print("Temperature: ");
    lcd.print(Temperature);
    lcd.print("C");

    delay(500);  // Reduced delay within the low temp & hum block
  } else {
    Serial.println("Status: Normal");
    digitalWrite(redLED_PIN, HIGH);
    digitalWrite(greenLED_PIN, LOW);
    digitalWrite(yellowLED_PIN, LOW);
    digitalWrite(Relay_PIN, LOW);
    noTone(BUZZER_PIN);

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Humidity: ");
    lcd.print(Humidity);
    lcd.print("%");

    lcd.setCursor(0, 1);
    lcd.print("Temperature: ");
    lcd.print(Temperature);
    lcd.print("C");

    delay(1000);  // Reduced delay within the normal block
  }

  // Phase 3: Status Checked
  lcd.clear();
  lcd.setCursor(0, 3);
  lcd.print("Status Checked");

  delay(2000);  // Reduced delay after the status check
}