#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
#include <ArduinoJson.h>
#include "DHT.h"
int flag = 0;
int flag2 = 0;
// -------- Define Pins -----------

#define GAS_1_PIN 34      // ✓
#define redLED_PIN 26     // ✓
#define buzzer1_PIN 21    // ✓

int count = 0;

int GAS_1_Value;

const unsigned long BOT_MTBS = 1000; // mean time between scan messages
unsigned long bot_lasttime;          // last time messages' scan has been done

// Wifi network station credentials
#define WIFI_SSID "network"
#define WIFI_PASSWORD "123456789"
// Telegram BOT Token (Get from Botfather)
#define BOT_TOKEN "6743180949:AAFE4lN6QQsvEY9U33Pv2a-ta45f-1iOrb4"

// Use @myidbot (IDBot) to find out the chat ID of an individual or a group
// Also note that you need to click "start" on a bot before it can
// message you
#define CHAT_ID "793949283"
#define CHAT_ID1 "6458727643"


WiFiClientSecure secured_client;
UniversalTelegramBot bot(BOT_TOKEN, secured_client);

//////////////////////////////////////////////////////////

void handleNewMessages(int numNewMessages)
{
  Serial.println("handleNewMessages");
  Serial.println(String(numNewMessages));

  for (int i = 0; i < numNewMessages; i++)
  {
    String chat_id = 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 == "/send_test_action")
    {
      bot.sendChatAction(chat_id, "typing");
      delay(4000);
      bot.sendMessage(chat_id, "Did you see the action message?");
    }

    if (text == "/Sensor_Data") {
      int   value1 = checkGAS_1();
      bot.sendMessage(chat_id, "GAS[1] reading is : " + String(value1));
    }

    if (text == "/start")
    {
      String welcome = "Welcome to Universal Arduino Telegram Bot library, " + from_name + ".\n";
      welcome += "This is Chat Action Bot example.\n\n";
      welcome += "/Sensor_Data : to return the current sensors data\n";
      bot.sendMessage(chat_id, welcome);
    }
  }
}
//////////////////////////////////////////////////////////



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

  pinMode(GAS_1_PIN, INPUT);
  pinMode(redLED_PIN, OUTPUT);
  pinMode(buzzer1_PIN, OUTPUT);


  // attempt to connect to Wifi network:
  Serial.print("Connecting to Wifi SSID ");
  Serial.print(WIFI_SSID);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  secured_client.setCACert(TELEGRAM_CERTIFICATE_ROOT); // Add root certificate for api.telegram.org
  while (WiFi.status() != WL_CONNECTED)
  {
    Serial.print(".");
    delay(500);
  }
  Serial.print("\nWiFi connected. IP address: ");
  Serial.println(WiFi.localIP());

  Serial.print("Retrieving time: ");
  configTime(0, 0, "pool.ntp.org"); // get UTC time via NTP
  time_t now = time(nullptr);
  while (now < 24 * 3600)
  {
    Serial.print(".");
    delay(100);
    now = time(nullptr);
  }
  Serial.println(now);

  bot.sendMessage(CHAT_ID, "Bot started up", "");
  delay(20000);
  Serial.println("delay finished");
}

int checkGAS_1() {
  int value1 = analogRead(GAS_1_PIN);
  Serial.print("GAS[1] value: ");
  Serial.println(value1);
  return value1;
}


void loop() {

  ///////////////////////////////////////////
  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();
  }
  ///////////////////////////////////////////
  GAS_1_Value = checkGAS_1();
  if (GAS_1_Value > 900) {
 digitalWrite(redLED_PIN, 1);
    digitalWrite(buzzer1_PIN, 1);
        bot.sendMessage(CHAT_ID, "GAS[1] detected " + String(GAS_1_Value));
        bot.sendMessage(CHAT_ID1, "GAS[1] detected " + String(GAS_1_Value));
  }
  else if (GAS_1_Value < 900)
  {
    digitalWrite(redLED_PIN, 0);
    digitalWrite(buzzer1_PIN, 0);
  }

  delay(50);

}//end of Loop