#include <WiFi.h>
#include <HTTPClient.h>
#include <DHT.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

#define FIREBASE_HOST "sonia-melani-default-rtdb.asia-southeast1.firebasedatabase.app"

// Pin
#define DHTPIN 15
#define DHTTYPE DHT22
#define LDR 34
#define BUZZER 12
#define LED_LDR 13    
#define LED_FB 14   

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

unsigned long sinkron = 0;

void setup() {
  Serial.begin(115200);

  pinMode(BUZZER, OUTPUT);
  pinMode(LED_LDR, OUTPUT);
  pinMode(LED_FB, OUTPUT);

  dht.begin();
  lcd.init();
  lcd.backlight();

  // Koneksi WiFi
  Serial.print("Konek WiFi");
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi Terhubung!");
}

// ================== FIREBASE ==================
void sendToFirebase(String path, String value) {
  if (WiFi.status() != WL_CONNECTED) return;

  HTTPClient http;
  String url = "https://" + String(FIREBASE_HOST) + "/" + path + ".json";

  http.begin(url);
  http.addHeader("Content-Type", "application/json");

  http.PUT(value);
  http.end();
}

int getFromFirebase(String path) {
  if (WiFi.status() != WL_CONNECTED) return 0;

  HTTPClient http;
  String url = "https://" + String(FIREBASE_HOST) + "/" + path + ".json";

  http.begin(url);
  int code = http.GET();

  int result = 0;
  if (code > 0) {
    String payload = http.getString();
    result = payload.toInt();
  }
  http.end();
  return result;
}

// ================== LOOP ==================
void loop() {
  float temp = dht.readTemperature();
  int ldrRaw = analogRead(LDR);
  float lux = map(ldrRaw, 4063, 0, 0, 1000);

  if (isnan(temp)) {
    Serial.println("Gagal baca DHT!");
    return;
  }

  // ===== BUZZER (jika suhu panas) =====
  bool buzzerStatus = (temp > 40.0);
  digitalWrite(BUZZER, buzzerStatus ? HIGH : LOW);

  // ===== LAMPU SELALU ON =====
  bool lampuStatus = true;
  digitalWrite(LED_LDR, HIGH);

  // ================= LCD =================
  lcd.clear();

  // Baris 1: Suhu
  lcd.setCursor(0, 0);
  lcd.print("Suhu:");
  lcd.print(temp, 1);
  lcd.print(" C");

  // Baris 2: Lampu
  lcd.setCursor(0, 1);
  lcd.print("Lampu:");
  lcd.print("ON");

  // ================= FIREBASE =================
  if (millis() - sinkron > 5000) {
    sinkron = millis();

    sendToFirebase("data/suhu", String(temp));
    sendToFirebase("data/lux", String(lux));
    sendToFirebase("status/buzzer", buzzerStatus ? "true" : "false");

    int ledRemote = getFromFirebase("control/led_remote");
    digitalWrite(LED_FB, ledRemote == 1 ? HIGH : LOW);
  }

  delay(500);
}