#include "RTClib.h"
#include <DHT.h>
#include <SPI.h>
#include <Wire.h>
#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include "Font7Seg.h"

#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
#define MAX_DEVICES 4 // Define the number of displays connected
#define CLK_PIN    13 // CLK or SCK
#define DATA_PIN   11 // DATA or MOSI
#define CS_PIN     10 // CS or SS
#define SPEED_TIME 10 // Speed of the transition
#define PAUSE_TIME  100
#define MAX_MESG   20

// These are for the clock
#define DS1307_ADDRESS 0x68

// Global variables
uint8_t hours, minutes, seconds;

char szTime[9];    // mm:ss\0
char szMesg[MAX_MESG + 1] = "";

uint8_t clear = 0x00;


// Hardware SPI connection
MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);

RTC_DS1307 rtc; //create an instant of RTC

DateTime previous;
DateTime current;

void beginDS1307()
{
  // Read the values ​​(date and time) of the DS1307 module
  Wire.beginTransmission(DS1307_ADDRESS);
  Wire.write(clear);
  Wire.endTransmission();
  Wire.requestFrom(DS1307_ADDRESS, 0x07);

  seconds = bcdToDec(Wire.read());
  minutes = bcdToDec(Wire.read());
  hours = bcdToDec(Wire.read() & 0xff);
}

uint8_t decToBcd(uint8_t value)
{
  return ((value / 10 * 16) + (value % 10));
}

uint8_t bcdToDec(uint8_t value)
{
  return ((value / 16 * 10) + (value % 16));
}

// Code for reading clock time
void getTime(char *psz, bool f = true)
{
  sprintf(psz, "%02d%c%02d", hours, (f ? ':' : ' '), minutes);
}

void setup () {
  Wire.begin();

  P.begin(2);
  P.setInvert(false);

  P.setZone(0, MAX_DEVICES - 4, MAX_DEVICES - 1);
  P.setZone(1, MAX_DEVICES - 4, MAX_DEVICES - 1);

  P.displayZoneText(1, szTime, PA_CENTER, SPEED_TIME, PAUSE_TIME, PA_PRINT, PA_NO_EFFECT);
  P.displayZoneText(0, szMesg, PA_CENTER, SPEED_TIME, 0, PA_PRINT , PA_NO_EFFECT);

  Serial.begin(115200);

//check rtc connection
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }
  previous = rtc.now();
}

void loop () {
  static bool flasher = false;

  current = rtc.now(); //get the current time

  Serial.print("Current time: ");
  display(current);

  previous = rtc.now();

  delay(1000);

  getTime(szMesg, flasher);

  P.print(szMesg);
}

void display(DateTime now){
  Serial.print(now.hour(), DEC);//get current hour
  Serial.print(':');
  Serial.print(now.minute(), DEC); //get current minute
  Serial.print(':');
  Serial.print(now.second(), DEC); //get current second
  Serial.println();

  beginDS1307();

  hours = (now.hour(), DEC);
  minutes = (now.minute(), DEC);
  seconds = (now.second(), DEC);


  /*
  P.displayAnimate();

  if (P.getZoneStatus(0))
  {
    switch (display)
    {
    case 0: // Clock
      P.setFont(0, numeric7Seg);
      P.setTextEffect(0, PA_PRINT, PA_NO_EFFECT);
      P.setPause(0, 0);

      if ((millis() - lastTime) >= 1000)
      {
        lastTime = millis();
        getTime(szMesg, flasher);
        flasher = !flasher;
      }

      if ((seconds == 00) && (seconds <= 30)) {
        display++;
        
      }

      break;
    }

    P.displayReset(0); // Rest zone zero
  }
  */
}