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

// Define the type of display used
#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
#define MAX_DEVICES 4

// Connections for the MAX7219
#define CLK_PIN  18
#define DATA_PIN 16
#define CS_PIN   5

// Initialize RTC, DHT, and LED matrix display
RTC_DS1307 rtc;
#define DHTPIN 15
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

MD_Parola display = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);

//char[12][5]={"Jan","Feb","March","Apr","May","June","July","Aug","Sep","Oct","Nov","Dec"};

// Variables to control the blinking colon
bool showColon = true; // Starts with colon shown
unsigned long previousMillis = 0;
const long interval = 1000; // Blink interval in milliseconds

void setup() {
  Serial.begin(115200);
  Wire.begin(21, 22);  // Initialize I2C with specific SDA and SCL pins in (SDA, SCL)
  
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }

  if (!rtc.isrunning()) {
    Serial.println("RTC is NOT running!");
    // Set the RTC to the date & time this sketch was compiled
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
  
  dht.begin();
  display.begin();
  display.setIntensity(0); // Set the brightness of the display (0-15)
  display.displayClear();
}

void loop() {
  DateTime now = rtc.now();
  int temp = dht.readTemperature();

  // Get the day of the week
  int dayOfWeek = now.dayOfTheWeek();  // Returns 0 for Sunday, 1 for Monday, ..., 6 for Saturday
  
  // Convert to day names
  const char* dayNames[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
  const char* dayName = dayNames[dayOfWeek];

  //Display time in HH:MM format
  char timeString[12];
  int hour = now.hour() % 12;
  if (hour == 0) 
    hour = 12; // handle midnight and noon cases
  display.setTextAlignment(PA_CENTER);
  for(int i=0;i<=50;i++)
  {
    if(i%2==0)
    {
      snprintf(timeString, sizeof(timeString), "%02d:%02d", hour, now.minute());
      display.print(timeString);
      delay(500);
    }
    else
    {
      snprintf(timeString, sizeof(timeString), "%02d %02d", hour, now.minute());
      display.print(timeString);
      delay(500);
    }
  }
  display.displayClear();
  while (!display.displayAnimate()) delay(25);

  // Display Time in 12-hour format with AM/PM
  snprintf(timeString, sizeof(timeString), "%02d:%02d %s", hour, now.minute(), now.hour() >= 12 ? "PM" : "AM");
  display.displayText(timeString, PA_CENTER, 40, 1, PA_SCROLL_LEFT, PA_SCROLL_LEFT);
  while (!display.displayAnimate()) delay(25);  // Continue animation

  // Display Day Name
  display.displayText(dayName, PA_CENTER, 40, 1, PA_SCROLL_LEFT, PA_SCROLL_LEFT);
  while (!display.displayAnimate()) delay(25);  // Continue animation

  const char* months[]={"Jan","Feb","March","Apr","May","June","July","Aug","Sep","Oct","Nov","Dec"};

  // Display Date in DD/MM/YYYY format
  char dateString[25];
  snprintf(dateString, sizeof(dateString), "%02d-%s-%04d", now.day(), months[now.month()], now.year());

  display.displayText(dateString, PA_CENTER, 40, 1, PA_SCROLL_LEFT, PA_SCROLL_LEFT);
  while (!display.displayAnimate()) delay(25);  // Continue animation

  // Display Temperature in Celsius
  const char deg=248;
  char tempString[10];
  dtostrf(temp, 1,1, tempString);
  //strcat(tempString, (char)248);
  strcat(tempString, "°C");
  
  //snprintf(tempString, sizeof(tempString), "%.1f%cC", temp, 248); // 248 is the ASCII code for degree symbol
  display.displayText(tempString, PA_CENTER, 40, 1, PA_SCROLL_LEFT, PA_SCROLL_LEFT);
  while (!display.displayAnimate()) delay(25);  // Continue animation
}