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

#define TELEGRAM_BOT_TOKEN "6715651936:AAEQbbn3CR9_7teKIJjqeDKy3y7a1CVVJYw"
#define CHAT_ID "6079673686"
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

int ledPin = 12;
int buzzerPin = 13;
int pirPin = 15;

// PIR Setup
int pirState = 0;
int savedPirState = 0;
int onPirMessage = 1;
int offPirMessage = 0;
const char* onPrintMsg = "Terdeteksi Ada Makhluk Hidup!";
const char* offPrintMsg = "Tidak Terdeteksi Ada Makhluk Hidup!";

// Buzzer Setup
int freq = 2000;
int channel = 0;
int resolution = 8;

WiFiClientSecure client;
UniversalTelegramBot bot(TELEGRAM_BOT_TOKEN, client);

void bot.sendMessage(const char* message) {
  bot.sendMessage(CHAT_ID, message, "");
}

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

  // Setup WiFi
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.print("Connected to ");
  Serial.println(WIFI_SSID);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  // pin LED 
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);

  // pin PIR Sensor
  pinMode(pirPin, INPUT);
  digitalWrite(pirPin, LOW);

  // pin Buzzer
  ledcSetup(channel, freq, resolution);
  ledcAttachPin(buzzerPin, channel);
}

void loop() {
  pirState = digitalRead(pirPin);

  if (pirState == 1) {
    digitalWrite(ledPin, HIGH);
    ledcWriteTone(channel, 2000);
    savedPirState = 0;

    if (savedPirState == 0) {
      delay(1000);
      Serial.println(onPrintMsg);

      // Send message to Telegram
      bot.sendMessage(onPrintMsg);

      savedPirState = 1;
    }
  } else {
    delay(1000);
    digitalWrite(ledPin, LOW);
    ledcWriteTone(channel, 0);

    Serial.println(offPrintMsg);

    // Send message to Telegram
    bot.sendMessage(offPrintMsg);
  }
}