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

#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW

#define MAX_DEVICES 4

#define CLK_PIN   13
#define DATA_PIN  11
#define CS_PIN    10

#define DHTPIN 2
#define DHTTYPE DHT22

MD_Parola display = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
RTC_DS1307 rtc;
DHT dht(DHTPIN, DHTTYPE);

void setup()
{
  Serial.begin(9600);

  display.begin();
  display.setIntensity(5);
  display.displayClear();

  dht.begin();

  Wire.begin();

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

  if (!rtc.isrunning())
  {
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
}

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

  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  char buffer[40];

  // Display Time
  sprintf(buffer, "%02d:%02d:%02d",
          now.hour(),
          now.minute(),
          now.second());

  display.displayClear();
  display.displayText(buffer, PA_CENTER, 60, 2000, PA_PRINT, PA_NO_EFFECT);

  while (!display.displayAnimate());

  delay(1000);

  // Display Date
  sprintf(buffer, "%02d/%02d/%04d",
          now.day(),
          now.month(),
          now.year());

  display.displayClear();
  display.displayText(buffer, PA_LEFT, 60, 2000, PA_SCROLL_LEFT, PA_SCROLL_LEFT);

  while (!display.displayAnimate());

  delay(1000);

  // Display Temperature
  if (!isnan(temp))
  {
    sprintf(buffer, "TEMP %.1fC", temp);

    display.displayClear();
    display.displayText(buffer, PA_LEFT, 60, 2000, PA_SCROLL_LEFT, PA_SCROLL_LEFT);

    while (!display.displayAnimate());

    delay(1000);
  }

  // Display Humidity
  if (!isnan(hum))
  {
    sprintf(buffer, "HUM %.1f%%", hum);

    display.displayClear();
    display.displayText(buffer, PA_LEFT, 60, 2000, PA_SCROLL_LEFT, PA_SCROLL_LEFT);

    while (!display.displayAnimate());

    delay(1000);
  }
}