#include <Wire.h>
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
#include <ArduinoJson.h>
#include <LiquidCrystal_I2C.h>

// LCD I2C configuration (address 0x27 typical)
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Wi-Fi and Telegram Credentials
const char* ssid = "Wokwi-GUEST"; 
const char* password = "";

#define BOTtoken "7223768065:AAENUdXAeRacGrA0SXacjFQhpz4WdvGT9po"
#define CHAT_ID "6750924550"

WiFiClientSecure client;
UniversalTelegramBot bot(BOTtoken, client);

// Pin declarations
const int ledPin = 2;
const int inputPin = 4;
const int buzzerPin = 13;

int pirState = LOW;
int value = 0;

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

  // LCD init
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Initializing...");

  // TLS cert for Telegram (ESP32)
  client.setCACert(TELEGRAM_CERTIFICATE_ROOT);

  pinMode(ledPin, OUTPUT);
  pinMode(inputPin, INPUT);
  pinMode(buzzerPin, OUTPUT);

  Serial.print("Connecting Wifi: ");
  Serial.println(ssid);

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

  int a = 0;
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
    a++;
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("WiFi Connected");
  delay(1000);
  lcd.setCursor(0, 1);
  lcd.print("IP:");
  lcd.print(WiFi.localIP());

  delay(1500);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Bot Ready...");

  bot.sendMessage(CHAT_ID, "CONNECT TO BOT", "");
}

void loop() {
  value = digitalRead(inputPin);
  if (value == HIGH) {
    digitalWrite(ledPin, HIGH);
    if (pirState == LOW) {
      Serial.println("Motion detected!");

      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Motion Detected!");
      lcd.setCursor(0, 1);
      lcd.print("Sending Alert...");

      // Buzzer pattern dengan tone
      for (int i = 0; i < 2; i++) {
        tone(buzzerPin, 1000);  // 1000 Hz
        delay(300);
        noTone(buzzerPin);
        delay(200);
      }
      delay(500);
      for (int i = 0; i < 2; i++) {
        tone(buzzerPin, 1000);
        delay(300);
        noTone(buzzerPin);
        delay(200);
      }

      bot.sendMessage(CHAT_ID, "LED NYALA", "");

      pirState = HIGH;
    }
  } else {
    digitalWrite(ledPin, LOW);
    noTone(buzzerPin); // pastikan buzzer mati kalau tidak ada gerakan
    if (pirState == HIGH) {
      Serial.println("Motion ended!");

      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("No Motion");

      pirState = LOW;
    }
  }
}