#include <WiFi.h>
#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <WiFi.h>
#include <time.h>

// ---------------- WIFI + NTP ----------------
#define NTP_SERVER     "pool.ntp.org"
#define UTC_OFFSET     0
#define UTC_OFFSET_DST 0

// ---------------- DOT MATRIX ----------------
#define HARDWARE_TYPE MD_MAX72XX::GENERIC_HW 	
 
#define MAX_DEVICES   4
#define CS_PIN        21
#define	HW_DIG_ROWS	1
#define	HW_REV_COLS	0
#define	HW_REV_ROWS	0

MD_Parola matrix = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);

// ---------------- FUNCTION ----------------
String getTimeString() {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    return "TIME ERR";
  }

  char buffer[16];
  strftime(buffer, sizeof(buffer), "%H:%M:%S", &timeinfo);
  return String(buffer);
}

String getDateString() {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    return "DATE ERR";
  }

  char buffer[16];
  strftime(buffer, sizeof(buffer), "%d/%m/%Y", &timeinfo);
  return String(buffer);
}

// ---------------- SETUP ----------------
void setup() {
  Serial.begin(115200);

  // LED MATRIX
  matrix.begin();
  matrix.setIntensity(10);
  matrix.displayClear();
  

  // WIFI
  matrix.print("CONNECTING");
  WiFi.begin("Wokwi-GUEST", "", 6);

  while (WiFi.status() != WL_CONNECTED) {
    delay(200);
  }

  matrix.print("ONLINE");
  delay(1500);

  // NTP GET TIME
  configTime(UTC_OFFSET, UTC_OFFSET_DST, NTP_SERVER);

  matrix.print("SYNC TIME");
  delay(1500);
}

// ---------------- LOOP ----------------
void loop() {

  // --- SHOW TIME ---
  matrix.displayClear();
  matrix.print(getTimeString());
  Serial.println(getTimeString());
  delay(2000);

  // --- SHOW DATE ---
 // matrix.displayClear();
  //matrix.print(getDateString());
  //delay(2000);
}