#include <WiFi.h>
#include <HTTPClient.h>
#include <WiFiClientSecure.h>

const char* WIFI_SSID = "Wokwi-GUEST";
const char* WIFI_PASS = "";

// Ganti sesuai punyamu
String FIREBASE_HOST = "https://iot2-7757d-default-rtdb.firebaseio.com/";
String FIREBASE_AUTH = "AIzaSyDxLPB5hkbH3v9HmcphcahnsE23Ykf9yno";

// Pin
const int LDR_PIN = 34;   // pin analog LDR
const int LED_PIN = 2;    // LED bawaan ESP32, bisa ganti ke relay/LED lain

unsigned long lastSend = 0;
const unsigned long intervalFirebase = 2000; // kirim tiap 2 detik

WiFiClientSecure client;

// ===========================
// Fungsi konek WiFi
// ===========================
void connectWiFi() {
  WiFi.begin(WIFI_SSID, WIFI_PASS);
  Serial.print("Menghubungkan ke WiFi");

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println();
  Serial.println("WiFi terkoneksi");
  Serial.print("IP: ");
  Serial.println(WiFi.localIP());
}

// ===========================
// Tulis integer ke Firebase
// ===========================
bool firebaseSetInt(String path, int value) {
  HTTPClient http;

  String url = FIREBASE_HOST + "/" + path + ".json?auth=" + FIREBASE_AUTH;
  http.begin(client, url);
  http.addHeader("Content-Type", "application/json");

  int httpCode = http.PUT(String(value));
  String payload = http.getString();

  Serial.print("PUT ");
  Serial.print(path);
  Serial.print(" => HTTP ");
  Serial.println(httpCode);

  if (httpCode > 0) {
    Serial.println("Response: " + payload);
  } else {
    Serial.println("Gagal kirim data ke Firebase");
  }

  http.end();
  return (httpCode == 200);
}

// ===========================
// Ambil integer dari Firebase
// ===========================
int firebaseGetInt(String path) {
  HTTPClient http;

  String url = FIREBASE_HOST + "/" + path + ".json?auth=" + FIREBASE_AUTH;
  http.begin(client, url);

  int httpCode = http.GET();
  String payload = http.getString();

  Serial.print("GET ");
  Serial.print(path);
  Serial.print(" => HTTP ");
  Serial.println(httpCode);

  int result = -1;

  if (httpCode == 200) {
    payload.trim();
    Serial.println("Response: " + payload);

    if (payload != "null" && payload.length() > 0) {
      result = payload.toInt();
    }
  } else {
    Serial.println("Gagal baca data dari Firebase");
  }

  http.end();
  return result;
}

// ===========================
// Setup
// ===========================
void setup() {
  Serial.begin(115200);

  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, LOW);

  // Untuk testing HTTPS
  client.setInsecure();

  connectWiFi();
}

// ===========================
// Loop
// ===========================
void loop() {
  if (WiFi.status() != WL_CONNECTED) {
    connectWiFi();
  }

  if (millis() - lastSend >= intervalFirebase) {
    lastSend = millis();

    // Baca LDR
    int ldrValue = analogRead(LDR_PIN);
    Serial.print("LDR = ");
    Serial.println(ldrValue);

    // Kirim nilai LDR ke Firebase
    firebaseSetInt("LDR", ldrValue);

    // Ambil status LED dari Firebase
    int ledStatus = firebaseGetInt("LED_status");

    if (ledStatus == 1) {
      digitalWrite(LED_PIN, HIGH);
      Serial.println("LED ON");
    } else if (ledStatus == 0) {
      digitalWrite(LED_PIN, LOW);
      Serial.println("LED OFF");
    } else {
      Serial.println("LED_status belum valid");
    }

    Serial.println("----------------------");
  }
}