#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
#include <ArduinoJson.h>

// SSID dan Password WiFi
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Telegram BOT
#define BOTtoken "6002754755:AAHAtMLM521JwZ96cUYZt0xG6D2u_5uHs9c"
#define CHAT_ID "699740824"
const int relayPin = 19;
WiFiClientSecure client;
UniversalTelegramBot bot(BOTtoken, client);

// Cek Pesan Setiap 1 detik
int interval = 1000;
unsigned long waktu_terakhir;
bool relayStatus = false; // Status awal relay mati
unsigned long relayTurnOffTime = 0; // Waktu relay akan dimatikan (dalam millis)

void setup() {
  // atur mode pin menjadi output
  pinMode(relayPin, OUTPUT);
  digitalWrite(relayPin, HIGH);
  Serial.begin(115200);

  // Hubungkan ke Wi-Fi
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  client.setCACert(TELEGRAM_CERTIFICATE_ROOT);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting...");
  }
  Serial.println("Connected.");
}

void loop() {
  
  cek_pesan();
}

// Cek Pesan Terbaru
void cek_pesan(){
  if (millis() > waktu_terakhir + interval){
    int banyakPesan = bot.getUpdates(bot.last_message_received + 1);
  
    while(banyakPesan) {
      Serial.println("got response");
      handleNewMessages(banyakPesan);
      banyakPesan = bot.getUpdates(bot.last_message_received + 1);
    }
    waktu_terakhir = millis();
  }
}

// Memproses pesan yang diterima
void handleNewMessages(int numNewMessages) {
  for (int i=0; i<numNewMessages; i++) {
    
    // Cek Chat ID
    String chat_id = String(bot.messages[i].chat_id);
    //if (chat_id != CHAT_ID){
    //  bot.sendMessage(chat_id, "Unauthorized user", "");
    //  continue;
    //}
    
    // Terima pesan dari telegram
    String text = bot.messages[i].text;
    Serial.println("Received Message : " + text);

    String from_name = bot.messages[i].from_name;
    if (text == "/ron") {
      digitalWrite(relayPin, HIGH);
      bot.sendMessage(chat_id, "Relay diaktifkan.", "");
      relayStatus = true;
    }
    else if (text == "/roff") {
      digitalWrite(relayPin, LOW);
      bot.sendMessage(chat_id, "Relay dimatikan.", "");
      relayStatus = false;
    }
    else if (text.startsWith("/timer")) {
        int duration = text.substring(7).toInt();
        if (duration > 0) {
          relayTurnOffTime = millis() + duration * 3600000;
          bot.sendMessage(chat_id, "Relay akan dimatikan dalam " + String(duration) + " jam.");
        } else {
          bot.sendMessage(chat_id, "Mohon masukkan durasi timer yang valid.");
        }
      }
    else {
      bot.sendMessage(chat_id, "Command not valid.");
    }
  }


  // Periksa waktu dan matikan relay jika waktu telah tiba
  if (relayStatus && millis() >= relayTurnOffTime) {
    digitalWrite(relayPin, LOW);
    relayStatus = false;
    bot.sendMessage(CHAT_ID, "Relay dimatikan sesuai jadwal.");
  }
}