#include <ESP32Servo.h>
#include <LiquidCrystal_I2C.h>

#define SERVO_PIN 25
#define LED_PIN 13
#define TRIG_PIN 12
#define ECHO_PIN 14
#define BUZZER_PIN 27

Servo pintuServo;
LiquidCrystal_I2C lcd(0x27, 20, 4);

String statusLampu = "OFF";
String statusPintu = "LOCKED";
bool welcomeSpoken = false;

void setup() {
  Serial.begin(115200);
  pintuServo.attach(SERVO_PIN);
  pintuServo.write(0); // Pintu awal terkunci
  
  pinMode(LED_PIN, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  
  lcd.init();
  lcd.backlight();
  
  lcd.setCursor(0, 0); lcd.print("SMART HOME SYSTEM");
  lcd.setCursor(0, 1); lcd.print("Awaiting Commands...");
  Serial.println("--- JARVIS VOICE TERMINAL ACTIVE ---");
  Serial.println("Gunakan Perintah: 'buka pintu', 'tutup pintu', 'nyalakan lampu', 'matikan lampu'");
  updateLCD();
}

void loop() {
  // 1. Fitur Welcome System (Sensor Jarak)
  digitalWrite(TRIG_PIN, LOW); delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH); delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  long duration = pulseIn(ECHO_PIN, HIGH);
  float distance = duration * 0.034 / 2;

  if (distance < 20 && !welcomeSpoken) { 
    tone(BUZZER_PIN, 1200, 100);
    lcd.setCursor(0, 3);
    lcd.print("Gimana Kabar bos");
    welcomeSpoken = true;
    delay(2000);
    updateLCD();
  } else if (distance >= 20) {
    welcomeSpoken = false;
  }

  // 2. Fitur Simulasi Voice Command via Serial Monitor
  if (Serial.available() > 0) {
    String command = Serial.readStringUntil('\n');
    command.trim();
    
    if (command == "buka pintu") {
      pintuServo.write(90);
      statusPintu = "OPEN";
      tone(BUZZER_PIN, 1000, 200);
    } 
    else if (command == "tutup pintu") {
      pintuServo.write(0);
      statusPintu = "LOCKED";
      tone(BUZZER_PIN, 800, 200);
    } 
    else if (command == "nyalakan lampu") {
      digitalWrite(LED_PIN, HIGH);
      statusLampu = "ON";
    } 
    else if (command == "matikan lampu") {
      digitalWrite(LED_PIN, LOW);
      statusLampu = "OFF";
    }
    
    updateLCD();
  }
  delay(100);
}

void updateLCD() {
  lcd.setCursor(0, 0); lcd.print("HABIB SMART HUB    ");
  lcd.setCursor(1, 1); lcd.print("Lampu Utama: " + statusLampu + "    ");
  lcd.setCursor(0, 2); lcd.print("Pintu Lab  : " + statusPintu + "    ");
  lcd.setCursor(0, 3); lcd.print("System Status: READY");
}