#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <RTClib.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
RTC_DS1307 rtc;

int boton = 6;
int rele = 9;
int valor = 0;
int presionados = 0;
unsigned long lastPressTime = 0;
unsigned long debounceDelay = 200;

const int alarmas[7][2] = {
  {8, 0}, {9, 20}, {10, 50},
  {13, 55}, {16, 20}, {17, 0},
  {18, 50}
};

void setup() {
  pinMode(boton, INPUT);
  pinMode(rele, OUTPUT);

  lcd.init();
  lcd.backlight();

  if (!rtc.begin()) {
    lcd.print("Error RTC");
    while (1);
  }

  // rtc.adjust(DateTime(2024, 5, 8, 14, 11, 0));  // Ajustar la hora si es necesario
}

void loop() {
  valor = digitalRead(boton);

  if (valor == LOW && (millis() - lastPressTime) > debounceDelay) {
    lastPressTime = millis();
    presionados++;
    if (presionados == 2) {
      mostrarTiempoRestante();
      presionados = 0;
    }
  }

  DateTime now = rtc.now();

  lcd.setCursor(0, 0);
  lcd.print("Hora: ");
  lcd.print(now.hour(), DEC);
  lcd.print(":");
  lcd.print(now.minute(), DEC);
  lcd.print(":");
  lcd.print(now.second(), DEC);

  if ((now.hour() == 8 && now.minute() == 0 && now.second() < 10) ||
      (now.hour() == 9 && now.minute() == 20 && now.second() < 10) ||
      (now.hour() == 10 && now.minute() == 50 && now.second() < 10) ||
      (now.hour() == 13 && now.minute() == 50 && now.second() < 10) ||
      (now.hour() == 16 && now.minute() == 20 && now.second() < 10) ||
      (now.hour() == 17 && now.minute() == 0 && now.second() < 10) ||
      (now.hour() == 18 && now.minute() == 50 && now.second() < 10)) {

    digitalWrite(rele, HIGH);  // Activa el relé durante 10 segundos
    lcd.setCursor(0, 1);
    lcd.print("Alarma Activa");
  } else {
    digitalWrite(rele, LOW);  // Desactiva el relé fuera de los 10 segundos
    lcd.setCursor(0, 1);
    lcd.print("Alarma Inactiva");
  }

  delay(1000);  // Espera 1 segundo antes de actualizar la pantalla
}

void mostrarTiempoRestante() {
  DateTime now = rtc.now();
  int segundosRestantes = 0;

  for (int i = 0; i < 7; i++) {
    int horaAlarma = alarmas[i][0];
    int minutoAlarma = alarmas[i][1];

    if ((now.hour() < horaAlarma) ||
        (now.hour() == horaAlarma && now.minute() < minutoAlarma)) {

      segundosRestantes = (horaAlarma - now.hour()) * 3600 +
                          (minutoAlarma - now.minute()) * 60 -
                          now.second();

      int horasRestantes = segundosRestantes / 3600;
      int minutosRestantes = (segundosRestantes % 3600) / 60;
      int segundosRestantesDisplay = segundosRestantes % 60;

      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Suena En:");
      lcd.setCursor(0, 1);
      lcd.print(horasRestantes);
      lcd.print("h ");
      lcd.print(minutosRestantes);
      lcd.print("m ");
      lcd.print(segundosRestantesDisplay);
      lcd.print("s");
      delay(5000);  // Mostrar por 5 segundos
      return;
    }
  }

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("No hay alarmas");
  lcd.setCursor(0, 1);
  lcd.print("pendientes hoy");
  delay(5000);
}