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

const unsigned long BOT_MTBS = 1000; // mean time between scan messages
#define BOT_TOKEN "6176846745:AAHKysQFnpcCHlAv84oNtreNDVlDd46wlac"
#define CHAT_ID "1265427106"
//X509List cert(TELEGRAM_CERTIFICATE_ROOT);
WiFiClientSecure secured_client;
UniversalTelegramBot bot(BOT_TOKEN ,secured_client);
unsigned long bot_lasttime; // last time messages' scan has been done


void handleNewMessages(int numNewMessages) {
  Serial.print("Handle New Messages: ");
  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", "");
      continue;
    }
    
    // Print the received message
    String text = bot.messages[i].text;
    Serial.println(text);
    
    String from_name = bot.messages[i].from_name;
    if (text == "/start") {
      String welcome = "Welcome , " + from_name + "\n";
      welcome += "Use the following commands to interact with the ESP32-CAM \n";
      welcome += "/photo : takes a new photo\n";
      welcome += "/send : send msg \n";
      bot.sendMessage(CHAT_ID, welcome, "");
    }
  }
}

void setup(){
  Serial.begin(115200);
  WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); 
  configInitCamera();
  WiFi.mode(WIFI_STA);
  clientTCP.setCACert(TELEGRAM_CERTIFICATE_ROOT);
  UniversalTelegramBot bot(BOT_TOKEN ,secured_client);

  WiFi.begin("Wokwi-GUEST", "", 6);
  Serial.print("connecting");
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    Serial.print(".");
  }
  Serial.println("starting");
  bot.sendMessage(CHAT_ID, "welcome", "");
  bot_lasttime = millis();
}
void loop(){
  if (millis() - bot_lasttime > BOT_MTBS)
  {
    Serial.println("-----------");
    int numNewMessages = bot.getUpdates(bot.last_message_received + 1);
    Serial.print(numNewMessages);
    while (numNewMessages)
    {
      Serial.println("got response");
      handleNewMessages(numNewMessages);
      numNewMessages = bot.getUpdates(bot.last_message_received + 1);
    }

    bot_lasttime = millis();
  }
  delay(100);
}