#include <WiFi.h>
#include <ThingsBoard.h>
#include "DHTesp.h"

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""
#define TOKEN "wza1n00omc7yq66merlp"
#define THINGSBOARD_SERVER "thingsboard.cloud"

#define DHT_PIN 15
#define LED_PIN 13

WiFiClient espClient;
ThingsBoard tb(espClient);
DHTesp dhtSensor;

bool ledState = false;
unsigned long lastSend = 0;

void setup() {
  Serial.begin(115200);
  pinMode(LED_PIN, OUTPUT);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

  Serial.println("Connecting to WiFi...");
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi connected!");
  Serial.println(WiFi.localIP());
}

void loop() {
  // Reconnect to WiFi if disconnected
  if (WiFi.status() != WL_CONNECTED) {
    reconnectWiFi();
  }

  // Connect to ThingsBoard if disconnected
  if (!tb.connected()) {
    Serial.println("Connecting to ThingsBoard...");
    if (tb.connect(THINGSBOARD_SERVER, TOKEN)) {
      Serial.println("Connected to ThingsBoard!");
      tb.RPC_Subscribe(handleRPC); // subscribe ke RPC
    } else {
      Serial.println("Failed to connect to ThingsBoard!");
      delay(3000);
      return;
    }
  }

  // Kirim data setiap 10 detik
  if (millis() - lastSend > 10000) {
    sendSensorData();
    lastSend = millis();
  }

  tb.loop(); // proses RPC dari ThingsBoard
}

// ========== Fungsi untuk mengirim data sensor ==========
void sendSensorData() {
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  Serial.print("Temperature: ");
  Serial.print(data.temperature);
  Serial.print(" °C, Humidity: ");
  Serial.print(data.humidity);
  Serial.println(" %");

  tb.sendTelemetryFloat("temperature", data.temperature);
  tb.sendTelemetryFloat("humidity", data.humidity);
  tb.sendTelemetryBool("LED_state", ledState);

  // LED otomatis menyala kalau suhu ekstrem
  if (data.temperature > 35 || data.temperature < 12 || data.humidity > 70 || data.humidity < 40) {
    digitalWrite(LED_PIN, HIGH);
    ledState = true;
  } else {
    digitalWrite(LED_PIN, ledState ? HIGH : LOW); // biar manual tetap dihormati
  }
}

// ========== Fungsi untuk reconnect WiFi ==========
void reconnectWiFi() {
  Serial.println("Reconnecting WiFi...");
  WiFi.disconnect();
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nReconnected!");
}

// ========== Fungsi RPC (kontrol dari ThingsBoard) ==========
RPC_Response handleRPC(const RPC_Data &data) {
  String methodName = data.getMethodName();
  Serial.println("RPC call: " + methodName);

  if (methodName == "setLED") {
    bool state = data.getParameter("value").as<bool>();
    digitalWrite(LED_PIN, state ? HIGH : LOW);
    ledState = state;
    Serial.println(String("LED set to: ") + (state ? "ON" : "OFF"));
    return RPC_Response("LED_state", ledState);
  }

  return RPC_Response("error", "Unknown method");
}