#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
#include <ESP32Ping.h> // Library ESP32Ping: https://github.com/espressif/esp32-arduino-lib-builder

// Konfigurasi WiFi
const char ssid[] = "Wokwi-GUEST";
const char pass[] = "";

// Alamat website atau IP yang ingin dipantau
const char* websiteURL = "site.undipa.ac.id"; // Gunakan hostname atau IP (contoh: "8.8.8.8")

// Initialize Telegram BOT
#define BOTtoken "1814579181:AAGUasYhK6z43R9XWL3exoEzdA2CXyAsA3g"
#define CHAT_ID "1209015823"

WiFiClientSecure client;
UniversalTelegramBot bot(BOTtoken, client);

// Variabel waktu untuk pengganti delay
unsigned long previousMillis = 0;
const long interval = 10000; // Interval pemeriksaan 10 detik

void setup() {
  Serial.begin(115200);
  Serial.println("Memulai koneksi WiFi...");
  Serial.println("Mencari WiFi:");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, pass);

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

  Serial.println("\nWiFi terhubung!");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
  bot.sendMessage(CHAT_ID, "Memulai Sistem Monitoring dengan Metode Ping", "");
}

void loop() {
  if (WiFi.status() != WL_CONNECTED) {
    Serial.println("Koneksi WiFi terputus. Mencoba menyambung ulang...");
    WiFi.disconnect();
    WiFi.reconnect();
    delay(5000);
    return;
  }

  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    cekPing();
  }
}

void cekPing() {
  Serial.println("Melakukan ping ke " + String(websiteURL));

  if (Ping.ping(websiteURL)) {
    Serial.println("Website CONNECT (Ping berhasil)");
    bot.sendMessage(CHAT_ID, "Website CONNECT: Ping berhasil ke " + String(websiteURL));
  } else {
    Serial.println("Website DISCONNECT (Ping gagal)");
    bot.sendMessage(CHAT_ID, "Website DISCONNECT: Ping gagal ke " + String(websiteURL));
  }
}