#include <WiFi.h> // Library Wifi
#include <WiFiClientSecure.h> // Library Wifi
#include <UniversalTelegramBot.h> //Library Bot Telegram
#include <DHT.h> //Library DHT11
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define lampu 4 // 
#define DHTPIN 2 // Contoh pin DHT
#define DHTTYPE DHT22   // DHT 11

DHT dht(DHTPIN, DHTTYPE);

// Initialize Wifi connection to the router
char ssid[] = "Wokwi-GUEST";     // Wifi Name
char password[] = ""; // Wifi Password

// Initialize Telegram BOT
#define BOTtoken "7784143458:AAGzOdKhHU0gZ7JFA5Vx188p3L_jEWCzip4" // Bot token from telegram app

WiFiClientSecure client;
UniversalTelegramBot bot(BOTtoken, client);

//Checks for new messages every 1 second.
int botRequestDelay = 1000;
unsigned long lastTimeBotRan;

LiquidCrystal_I2C lcd(0x27, 20, 4);  // Set the LCD I2C address and dimensions (16x2)

void handleNewMessages(int numNewMessages) {
  
  Serial.println("handleNewMessages");
  Serial.println(String(numNewMessages));
  
  for (int i=0; i<numNewMessages; i++) {
    
    String chat_id = String(bot.messages[i].chat_id);
    String text = bot.messages[i].text;
    String from_name = bot.messages[i].from_name;
    
    if (from_name == "") from_name = "Guest";
    
    if (text == "/temperature") {
      int t = dht.readTemperature();
      String temp = "Temperature : ";
      temp += int(t);
      temp +=" *C\n";
      bot.sendMessage(chat_id,temp, "");
      if (t > 30){ //Jika suhu lebih dari 30 derajat celcius, maka
        String temp = "Suhu Lebih Dari 30 Derajat Celcius ";
        bot.sendMessage(chat_id,temp, "");
      }
      else { //Jika suhu kurang dari sama dengan 30 derajat celcius, maka
        String temp = "Suhu Dibawah 30 Derajat Celcius ";
        bot.sendMessage(chat_id,temp, "");
      }
    }
    
    if (text == "/humidity") {
      int h = dht.readHumidity();
      String hum = "Humidity: ";
      hum += int(h);
      hum += " %";
      bot.sendMessage(chat_id,hum, "");
    }
    
    if (text == "/lampuON") {
      digitalWrite(lampu, HIGH);
      lcd.setCursor(0, 2);
      lcd.print("Lampu: Hidup   ");
      String Lampu1= "Lampu Hidup";
      bot.sendMessage(chat_id,Lampu1, "");
    }
    else if (text == "/lampuOFF") {
      digitalWrite(lampu, LOW);
      lcd.setCursor(0, 2);
      lcd.print("Lampu: Mati    ");
      String Lampu2= "Lampu Mati";
      bot.sendMessage(chat_id,Lampu2, "");
    }
    
    if (text == "/start") {
      
      String welcome = "Welcome  " + from_name + ".\n";
      
      welcome += "/temperature : Temperature reading\n";
      welcome += "/humidity : Humiditiy reading\n";
      welcome += "/lampuON : Lampu Hidup \n";
      welcome += "/lampuOFF : Lampu Mati \n";
      
      bot.sendMessage(chat_id, welcome, "Markdown");
      
    }
    
  }
  
}

void setup() {
  
  Serial.begin(115200); // Menggunakan baud rate 115200
  
  dht.begin();
  pinMode(lampu, OUTPUT);  //Setting LED sebagai output

  client.setInsecure();
  
  // Set WiFi to station mode and disconnect from an AP if it was Previously
  // connected
  
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  delay(100);
  
  // attempt to connect to Wifi network:
  Serial.print("Connecting Wifi: ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    
    delay(500);
    
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  // Initialize LCD
  lcd.init();
  lcd.backlight();
  lcd.print("Temperature:");
  lcd.setCursor(0, 1);
  lcd.print("Humidity:");
}

void loop() {
  
  double t = dht.readTemperature();
  double h = dht.readHumidity();

  // Update LCD display
  lcd.setCursor(12, 0);
  lcd.print(t);
  lcd.setCursor(9, 1);
  lcd.print(h);
  
  if (millis() > lastTimeBotRan + botRequestDelay)  {
    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);
      
    }
    lastTimeBotRan = millis();
  }
}