#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
#include <ArduinoJson.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

// koneksi ke WiFi sendiri
#define WIFI_SSID "FITRIA AMRINA"
#define WIFI_PASSWORD "20071982"

#define BOT_TOKEN "6275850405:AAHGLUpugcX5xG6x5Ll-pkVJfgVkgeAo5M8"
#define CHAT_ID "6298678396"

WiFiClientSecure secured_client;
UniversalTelegramBot bot(BOT_TOKEN, secured_client);

const unsigned long BOT_MTBS = 1000; 
unsigned long bot_lasttime; 

int buzzerPin = 15;                // Deklarasi variabel input pin buzzer
int inputPin = 14;               // Deklarasi variabel input pin Sensor PIR
int pirState = LOW;             // Pada saat memulai, Sensor PIR dimulai dari LOW
int val = 0;                    // Deklarasi variabel untuk membaca status pin

void handleNewMessages(int numNewMessages)
{
  Serial.print("handleNewMessages ");
  Serial.println(numNewMessages);
  for (int i = 0; i < numNewMessages; i++)
  {
    String chat_id = String(bot.messages[i].chat_id);
    
    if (chat_id != CHAT_ID )
    {
      bot.sendMessage(chat_id, "Unauthorized user", "");
    }
    else
    {
      String text = bot.messages[i].text;
      String from_name = bot.messages[i].from_name;
      if (from_name == "")
        from_name = "Guest";
      if (text == "/status")
      {
        if (pirState == HIGH) 
        {  
          String msg = "Gerakan : \n";
          msg += "TIDAK TERDETEKSI";         
          bot.sendMessage(chat_id,msg,"");
        } else
        if (pirState == LOW) 
        {  
          String msg2 = "Gerakan : \n";
          msg2 += "TERDETEKSI";         
          bot.sendMessage(chat_id,msg2,"");
        } 
      } else 
      if (text == "/start") 
      {
        String welcome = "Monitoring gerak menggunakan sensor PIR \n";
        welcome  += "/status : cek kondisi gerakan \n";
        bot.sendMessage(CHAT_ID, welcome, "");
      }    
    }
  }
}

void setup() 
{
  pinMode(buzzerPin, OUTPUT);      // Deklarasi buzzer sebagai Output
  pinMode(inputPin, INPUT);     // Deklarasi Sensor PIR sebagai Input

  Serial.begin(9600);
  Serial.print("Connecting to WiFi");
  WiFi.begin("Wokwi-GUEST", "", 6);
  secured_client.setCACert(TELEGRAM_CERTIFICATE_ROOT);
  while (WiFi.status() != WL_CONNECTED) 
  {
    delay(100);
    Serial.print(".");
  }
  Serial.println(" Connected!");
 
  // Program Awal LCD
  LCD.init();
  LCD.backlight();
  LCD.setCursor(5,0);
  LCD.print("SENSOR");
  LCD.setCursor(1,1);
  LCD.print("GERAK/BAYANGAN");
  delay (1000);
}

void loop() 
{
  val = digitalRead(inputPin);  // Membaca nilai input
  if (val == LOW) {            // Jika Input LOW, maka :
    digitalWrite(buzzerPin, LOW);  // LED tidak menyala
    if (pirState == LOW) {
      // Jika, input LOW maka akan LCD akan mengeluarkan output "TIDAK TERDETEKSI GERAKAN"
      LCD.init();
      LCD.backlight();
      LCD.setCursor(0,0);
      LCD.print("TIDAK TERDETEKSI");
      LCD.setCursor(0,1);
      LCD.print("    GERAKAN    ");
      // Output program akan terganti, jika input bernilai HIGH
      pirState = HIGH;
    }
  } else {
    digitalWrite(buzzerPin, HIGH); // Menuliskan nilai LED/output bernilai HIGH
    if (pirState == HIGH) {  // Jika Input HIGH, maka :
       // Jika, input HIGH maka akan LCD akan mengeluarkan output "TERDETEKSI GERAKAN"
      LCD.init();
      LCD.init();
      LCD.backlight();
      LCD.setCursor(0,0);
      LCD.print("   TERDETEKSI   ");
      LCD.setCursor(0,1);
      LCD.print("    GERAKAN    ");
      // Output program akan terganti, jika input bernilai LOW
      pirState = LOW;
    }
  }
  if (millis() - bot_lasttime > BOT_MTBS)
  {
    int numNewMessages = bot.getUpdates(bot.last_message_received + 1);
    while (numNewMessages)
    {
      Serial.println("got response");
      handleNewMessages(numNewMessages);
      numNewMessages = bot.getUpdates(bot.last_message_received + 1);
    }
    bot_lasttime = millis();
  }
}