#include <Wire.h>
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
#include <ArduinoJson.h>
#include <ESP32Servo.h>
#include <LiquidCrystal_I2C.h>

// WiFi & Telegram Bot
const char* ssid = "Wokwi-GUEST";
const char* password = "";
#define BOTtoken "7827273614:AAFbOjQJAowxN9b9JuPMSLWTYUwVxthF9gA"
#define CHAT_ID "5368241114"

WiFiClientSecure client;
UniversalTelegramBot bot(BOTtoken, client);

// Pin Setup
const int ledPin = 2;
const int irPin = 4;
const int buzzerPin = 5;
const int servoPin = 18;

// Komponen
Servo myServo;
LiquidCrystal_I2C lcd(0x27, 16, 2);

bool objectDetected = false;

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

  // Inisialisasi pin
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(irPin, INPUT);
  digitalWrite(buzzerPin, LOW);

  // Inisialisasi komponen
  myServo.attach(servoPin);
  myServo.write(0); // posisi awal

  Wire.begin(21, 22); // I2C LCD pin default
  lcd.init();
  lcd.backlight();
  lcd.clear();

  // WiFi
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi connected");
  Serial.println(WiFi.localIP());

  client.setCACert(TELEGRAM_CERTIFICATE_ROOT);
  bot.sendMessage(CHAT_ID, "Bot sudah aktif!", "");
}

void loop() {
  int value = digitalRead(irPin);

  if (value == LOW && !objectDetected) {
    objectDetected = true;
    Serial.println("Objek Terdeteksi!");
    bot.sendMessage(CHAT_ID, "Ada yang lewat... seperti kenangan lama :')", "");

    // Aktifkan komponen
    digitalWrite(ledPin, HIGH);
    digitalWrite(buzzerPin, HIGH);
    myServo.write(90);

    // Scroll tulisan satu kali dari kanan ke kiri
    String teks = "Kenangan terindah";
    int panjang = teks.length();

    for (int i = 16; i >= -panjang; i--) {
      lcd.clear();
      if (i >= 0) {
        lcd.setCursor(i, 0);
        lcd.print(teks);
      } else {
        lcd.setCursor(0, 0);
        lcd.print(teks.substring(-i));
      }
      delay(200);
    }

    // Matikan komponen setelah scroll selesai
    digitalWrite(ledPin, LOW);
    digitalWrite(buzzerPin, LOW);
    myServo.write(0);
  }

  // Reset status jika tidak ada objek
  if (value == HIGH && objectDetected) {
    objectDetected = false;
    Serial.println("Objek keluar...");
    delay(300); // debouncing
  }

  delay(100);
}