#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
// Wifi network station credentials
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""
// Telegram BOT Token (Get from Botfather)
#define BOT_TOKEN "7756879889:AAHZOLQZ_t3NMH5OXMjCVuxSizp4rHoYKmA"

const unsigned long BOT_MTBS = 10000; // mean time between scan messages

WiFiClientSecure secured_client;
UniversalTelegramBot bot(BOT_TOKEN, secured_client);
unsigned long bot_lasttime; // last time messages' scan has been done

const int ledPin = LED_BUILTIN;
int ledStatus = 0;
String update_text;

// Define the number of devices we have in the chain and the hardware interface
// NOTE: These pin numbers will probably not work with your hardware and may
// need to be adapted
#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
#define MAX_DEVICES 8

#define CLK_PIN    5
#define DATA_PIN  19
#define CS_PIN    18

// Hardware SPI connection
// MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
// Arbitrary output pins
MD_Parola P = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);

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

  for (int i = 0; i < numNewMessages; i++) {
    String chat_id = bot.messages[i].chat_id;
    String text = bot.messages[i].text;
    update_text = text;
  
    String from_name = bot.messages[i].from_name;
    if (from_name == "")
      from_name = "Guest";

    if (text == "/ledon")
    {
      digitalWrite(ledPin, LOW); // turn the LED on (HIGH is the voltage level)
      ledStatus = 1;
      bot.sendMessage(chat_id, "Led is ON", "");
    }

    if (text == "/ledoff") {
      ledStatus = 0;
      digitalWrite(ledPin, HIGH); // turn the LED off (LOW is the voltage level)
      bot.sendMessage(chat_id, "Led is OFF", "");
    }

    if (text == "/status") {
      if (ledStatus)
      {
        bot.sendMessage(chat_id, "Led is ON", "");
      }
      else
      {
        bot.sendMessage(chat_id, "Led is OFF", "");
      }
    }

    if (text == "/start") {
      String welcome = "Welcome to Universal Arduino Telegram Bot library, " + from_name + ".\n";
      welcome += "This is Flash Led Bot example.\n\n";
      welcome += "/ledon : to switch the Led ON\n";
      welcome += "/ledoff : to switch the Led OFF\n";
      welcome += "/status : Returns current status of LED\n";
      bot.sendMessage(chat_id, welcome, "Markdown");
    }
  }
}

void setup(void) {
  P.begin();
  pinMode(ledPin, OUTPUT); // initialize digital ledPin as an output.
  delay(10);
  digitalWrite(ledPin, HIGH); // initialize pin as off (active LOW)

  // 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());
  update_text = "Running text Telegram";
}

void loop(void) {
  if (P.displayAnimate())
    P.displayText(update_text.c_str(), PA_RIGHT, P.getSpeed(), 0, PA_SCROLL_LEFT, PA_SCROLL_LEFT);

  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();
  }
}