#include <OneWire.h>
#include <DallasTemperature.h>
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>

#define ONE_WIRE_BUS 2    
#define MQ2_PIN A0        
#define LDR_PIN A1       
#define BUZZER_PIN 7   
#define LED_PIN 6        

#define TFT_CS 10         
#define TFT_RST 8         
#define TFT_DC 9          

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

bool isFireDetected = false;
bool wasFireDetected = false;

void setup() {
  Serial.begin(9600);
  sensors.begin();
  
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);

  tft.begin();
  tft.setRotation(3);  

  tft.fillScreen(ILI9341_BLACK);
  tft.setCursor(10, 10);
  tft.setTextSize(1);
  tft.setTextColor(ILI9341_WHITE);
  tft.print("SISTEM DETEKSI DAN ALARM KEBAKARAN");
  tft.setCursor(10, 30);
  tft.setTextSize(1);
  tft.setTextColor(ILI9341_WHITE);
  tft.print("BERBASIS MIKROKONTROLER");
  tft.setCursor(10, 50);
  tft.setTextSize(1);
  tft.setTextColor(ILI9341_WHITE);
  tft.print("DI WOKWI: SENSOR API, ASAP, DAN SUHU");

  delay(2000);
  tft.fillScreen(ILI9341_BLACK);
  delay(1000);
}

void loop() {
  // Baca suhu dari sensor DS18B20
  sensors.requestTemperatures();
  float temperatureC = sensors.getTempCByIndex(0);
  Serial.print("Temperature: ");
  Serial.print(temperatureC);
  Serial.println(" °C");

  // Baca nilai asap dari sensor MQ-2
  int smokeValue = analogRead(MQ2_PIN);
  Serial.print("Smoke Value: ");
  Serial.println(smokeValue);

  // Baca nilai cahaya dari sensor LDR
  int lightValue = analogRead(LDR_PIN);
  Serial.print("Light Value: ");
  Serial.println(lightValue);

  tft.fillRect(10, 70, 300, 40, ILI9341_BLACK);
  
  tft.setCursor(10, 70);
  tft.setTextSize(3);
  tft.setTextColor(ILI9341_WHITE);
  tft.print("Suhu   : ");
  tft.print(temperatureC);
  tft.print(" C");

  tft.fillRect(10, 110, 300, 40, ILI9341_BLACK);
  
  tft.setCursor(10, 110);
  tft.setTextSize(3);
  tft.setTextColor(ILI9341_WHITE);
  tft.print("Lux    : ");
  tft.print(lightValue);
  tft.setTextSize(1);
  tft.print("(N. Analog)");

  tft.fillRect(10, 150, 300, 40, ILI9341_BLACK);
  
  tft.setCursor(10, 150);
  tft.setTextSize(3);
  tft.setTextColor(ILI9341_WHITE);
  tft.print("Asap   : ");

  if ((lightValue < 190 && temperatureC > 50 && smokeValue > 500) ||
      (temperatureC > 50 && smokeValue > 500) ||
      (lightValue < 190 && smokeValue > 500)) {
    isFireDetected = true;
  } else {
    isFireDetected = false;
  }
  
  if (isFireDetected && !wasFireDetected) {
    tft.setTextColor(ILI9341_RED);
    tft.setCursor(10, 200); 
    tft.setTextSize(3);
    tft.print("Terjadi Kebakaran");
    tone(BUZZER_PIN, 400);
    digitalWrite(BUZZER_PIN, HIGH);
    digitalWrite(LED_PIN, HIGH);
  } else if (!isFireDetected && wasFireDetected) {
    tft.fillRect(10, 200, 400, 40, ILI9341_BLACK);
    tft.setTextColor(ILI9341_WHITE);
    tft.setCursor(10, 180); 
    tft.setTextSize(3);
    noTone(BUZZER_PIN);
    digitalWrite(BUZZER_PIN, LOW);
    digitalWrite(LED_PIN, LOW);
  }

  wasFireDetected = isFireDetected;

  tft.setCursor(150, 150); 
  tft.setTextSize(3);
  if (smokeValue > 500) {
    tft.setTextColor(ILI9341_RED);
    tft.print(" Ya");
  } else {
    tft.setTextColor(ILI9341_WHITE);
    tft.print(" Tidak");
  }

  delay(1000);  
}