#include <Wire.h>
#include "RTClib.h"

RTC_DS3231 rtc;

#define LED1 25  // pisca a cada hora
#define LED2 26  // pisca a cada 10 minutos
#define LED3 27  // pisca a cada minuto

int lastMinute = -1;
int lastTenMinutes = -1;
int lastHour = -1;

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

  if (!rtc.begin()) {
    Serial.println("⚠️  RTC não encontrado!");
    while (1);
  }

  // rtc.adjust(DateTime(F(__DATE__), F(__TIME__))); // use 1x para ajustar o relógio

  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);

  digitalWrite(LED1, LOW);
  digitalWrite(LED2, LOW);
  digitalWrite(LED3, LOW);

  Serial.println("✅ Sistema iniciado. Aguardando mudança de tempo...");
}

void loop() {
  DateTime now = rtc.now();

  int currentMinute = now.minute();
  int currentTenMinute = currentMinute / 10;
  int currentHour = now.hour();

  // Pisca LED3 e mostra hora a cada minuto
  if (currentMinute != lastMinute) {
    blinkLED(LED3);
    lastMinute = currentMinute;

    Serial.print("🕒 Hora atual: ");
    printTime(now);
  }

  // Pisca LED2 a cada 10 minutos
  if (currentTenMinute != lastTenMinutes) {
    blinkLED(LED2);
    lastTenMinutes = currentTenMinute;
    Serial.println("🔸 LED2: dezena de minuto mudou!");
  }

  // Pisca LED1 a cada hora
  if (currentHour != lastHour) {
    blinkLED(LED1);
    lastHour = currentHour;
    Serial.println("🕐 LED1: hora mudou!");
  }

  delay(1000); // verifica a cada segundo
}

void blinkLED(int pin) {
  digitalWrite(pin, HIGH);
  delay(200);
  digitalWrite(pin, LOW);
}

void printTime(DateTime now) {
  // Mostra formato HH:MM:SS DD/MM/YYYY
  char buffer[25];
  sprintf(buffer, "%02d:%02d:%02d %02d/%02d/%04d",
          now.hour(), now.minute(), now.second(),
          now.day(), now.month(), now.year());
  Serial.println(buffer);
}