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

const int DHT_PIN = 15;
const int BUZZER = 18;
const int LED = 5;

const int MQ2_PIN = 34;      // Pin analog sensor asap
const int FLAME_PIN = 35;    // Pin digital sensor api

DHTesp dhtSensor;
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  Serial.begin(115200);
  
  pinMode(BUZZER, OUTPUT);
  pinMode(LED, OUTPUT);
  pinMode(FLAME_PIN, INPUT);
  
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  lcd.init();
  lcd.backlight();
}

void loop() {
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  int mq2Value = analogRead(MQ2_PIN);      // Baca nilai asap
  int flameValue = digitalRead(FLAME_PIN); // LOW = api terdeteksi

  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.println("Smoke Value: " + String(mq2Value));
  Serial.println("Flame Detected: " + String(flameValue == LOW ? "YES" : "NO"));
  Serial.println("---");

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: " + String(data.temperature, 1) + " C");

  delay(1000);
  lcd.setCursor(0, 1);

  if (data.temperature > 32 && flameValue == LOW) {
    // 🔥 SYARAT KEBARAKARAN: suhu tinggi + api terdeteksi
    lcd.print("KEBAKARAN!!!");
    digitalWrite(LED, HIGH);
    tone(BUZZER, 1500);
  }
  else if (data.temperature > 32 && flameValue != LOW) {
    lcd.print("SUHU TINGGI");
    digitalWrite(LED, LOW);
    noTone(BUZZER);
  }
  else if (flameValue == LOW && data.temperature <= 32) {
    lcd.print("API TERDETEKSI / SUHU WAJAR");
    digitalWrite(LED, LOW);
    noTone(BUZZER);
  }
  else if (mq2Value > 3000) {
    lcd.print("ASAP TERDETEKSI");
    digitalWrite(LED, LOW);
    noTone(BUZZER);
  }
  else if (data.temperature < 20) {
    lcd.print("SUHU AMAN");
    digitalWrite(LED, LOW);
    noTone(BUZZER);
  }
  else {
    lcd.print("NORMAL");
    digitalWrite(LED, LOW);
    noTone(BUZZER);
  }

  delay(2000);
}