// Date and time functions using a DS1307 RTC connected via I2C and Wire lib
#include "RTClib.h"

RTC_DS1307 rtc;

char daysOfTheWeek[7][12] = {"Domingo", "Segunda", "Terça", "Quarta", "Quinta", "Sexta", "Sábado"};
char HorasSerial;
char MinutosSerial;
//char SegundosSerial;

int OnOff;
int HorasDefinido = -1;
int MinutosDefinido = -1;
//int SegundosDefinido;

void setup () {
  Serial.begin(57600);
  pinMode(A2, INPUT);

#ifndef ESP8266
  while (!Serial); // wait for serial port to connect. Needed for native USB
#endif

  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    while (1) delay(10);
  }

  if (! rtc.isrunning()) {
    Serial.println("RTC is NOT running, let's set the time!");
    // When time needs to be set on a new device, or after a power loss, the
    // following line sets the RTC to the date & time this sketch was compiled
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
    // This line sets the RTC with an explicit date & time, for example to set
    // January 21, 2014 at 3am you would call:
    // rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
  }

  // When time needs to be re-set on a previously configured device, the
  // following line sets the RTC to the date & time this sketch was compiled
  // rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  // This line sets the RTC with an explicit date & time, for example to set
  // January 21, 2014 at 3am you would call:
  // rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
}

void loop () {

    if (HorasDefinido < 0){
    Serial.println("Digite por quantas horas deseja deixar a máquina ligada, de 0 a 15 (0 a F):");

    if (Serial.available() > 0){
    HorasSerial = Serial.read();}
    }
    
    switch (HorasSerial){

    case '0':
    HorasDefinido = 0;
    break;

    case '1':
    HorasDefinido = 1;
    break;
    
    case '2':
    HorasDefinido = 2;
    break;

    case '3':
    HorasDefinido = 3;
    break;

    case '4':
    HorasDefinido = 4;
    break;

    case '5':
    HorasDefinido = 5;
    break;

    case '6':
    HorasDefinido = 6;
    break;

    case '7':
    HorasDefinido = 7;
    break;

    case '8':
    HorasDefinido = 8;
    break;

    case '9':
    HorasDefinido = 9;
    break;

    case 'A':
    HorasDefinido = 10;
    break;

    case 'a':
    HorasDefinido = 10;
    break;

    case 'B':
    HorasDefinido = 11;
    break;

    case 'b':
    HorasDefinido = 11;
    break;

    case 'C':
    HorasDefinido = 12;
    break;

    case 'c':
    HorasDefinido = 12;
    break;

    case 'D':
    HorasDefinido = 13;
    break;

    case 'd':
    HorasDefinido = 13;
    break;

    case 'E':
    HorasDefinido = 14;
    break;

    case 'e':
    HorasDefinido = 14;
    break;

    case 'F':
    HorasDefinido = 15;
    break;

    case 'f':
    HorasDefinido = 15;
    break;}

    if(HorasDefinido > 0){
    Serial.println(HorasDefinido);}

    if (MinutosDefinido < 0 && HorasDefinido > -1){
    Serial.println("Digite por quantos minutos deseja deixar a máquina ligada, de 0 a 15 (0 a F):");

    if (Serial.available() > 0){
    MinutosSerial = Serial.read();}
    }
    switch (MinutosSerial){

    case '0':
    MinutosDefinido = 0;
    break;

    case '1':
    MinutosDefinido = 1;
    break;
    
    case '2':
    MinutosDefinido = 2;
    break;

    case '3':
    MinutosDefinido = 3;
    break;

    case '4':
    MinutosDefinido = 4;
    break;

    case '5':
    MinutosDefinido = 5;
    break;

    case '6':
    MinutosDefinido = 6;
    break;

    case '7':
    MinutosDefinido = 7;
    break;

    case '8':
    MinutosDefinido = 8;
    break;

    case '9':
    MinutosDefinido = 9;
    break;

    case 'A':
    MinutosDefinido = 10;
    break;

    case 'a':
    MinutosDefinido = 10;
    break;

    case 'B':
    MinutosDefinido = 11;
    break;

    case 'b':
    MinutosDefinido = 11;
    break;

    case 'C':
    MinutosDefinido = 12;
    break;

    case 'c':
    MinutosDefinido = 12;
    break;

    case 'D':
    MinutosDefinido = 13;
    break;

    case 'd':
    MinutosDefinido = 13;
    break;

    case 'E':
    MinutosDefinido = 14;
    break;

    case 'e':
    MinutosDefinido = 14;
    break;

    case 'F':
    MinutosDefinido = 15;
    break;

    case 'f':
    MinutosDefinido = 15;
    break;}

    if(HorasDefinido > 0){
    Serial.println(HorasDefinido);}
    
    if (digitalRead(A2) == 0){
    OnOff = OnOff - 1;}

    if(OnOff == 0){

    DateTime now = rtc.now();
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    /*Serial.print(" since midnight 1/1/1970 = ");
    Serial.print(now.unixtime());
    Serial.print("s = ");
    Serial.print(now.unixtime() / 86400L);
    Serial.println("d");

    // calculate a date which is 7 days, 12 hours, 30 minutes, and 6 seconds into the future
    DateTime future (now + TimeSpan(7,12,30,6));

    Serial.print(" now + 7d + 12h + 30m + 6s: ");
    Serial.print(future.year(), DEC);
    Serial.print('/');
    Serial.print(future.month(), DEC);
    Serial.print('/');
    Serial.print(future.day(), DEC);
    Serial.print(' ');
    Serial.print(future.hour(), DEC);
    Serial.print(':');
    Serial.print(future.minute(), DEC);
    Serial.print(':');
    Serial.print(future.second(), DEC);
    Serial.println();

    Serial.println();*/
    delay(1000);}

    if (digitalRead(A2) == 1){
    OnOff = 1;}
}