#include <LedControl.h>
#include <Wire.h>
#include <RTClib.h>
#include "DHT.h"

// Pin Definitions
#define DIN_PIN    12
#define CS_PIN     11
#define CLK_PIN    10
#define DHT_PIN    8
#define DHT_TYPE   DHT22

// Initialize the LED matrix (32x8 -> 4 matrices)
LedControl lc = LedControl(DIN_PIN, CLK_PIN, CS_PIN, 1);

// Initialize the DHT sensor
DHT dht(DHT_PIN, DHT_TYPE);

// Initialize the RTC
RTC_DS1307 rtc;

// Circle pattern
byte circle[8] = {
    B00000000,
    B00000000,
    B00000000,
    B01111110,
    B10000001,
    B10000001,
    B01111110,
    B00000000
};

// Line pattern
byte line[8] = {
    B00000000,
    B00000000,
    B00000000,
    B00000000,
    B11111111,
    B11111111,
    B00000000,
    B00000000
};

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

  // Initialize LED matrices
  for (int i = 0; i < 4; i++) {
    lc.shutdown(i, false);       // Wake up displays
    lc.setIntensity(i, 32);       // Set brightness level (0 is min, 15 is max)
    lc.clearDisplay(i);          // Clear display register
  }

  // Initialize DHT22
  dht.begin();

  // Initialize RTC
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }
  if (!rtc.isrunning()) {
    Serial.println("RTC is NOT running!");
    // Use DATE and TIME directly without F() macro
    rtc.adjust(DateTime(__DATE__, __TIME__)); // Set RTC to the date & time this sketch was compiled
  }
}

void loop() {
  // Get the temperature and humidity
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Get the current time
  DateTime now = rtc.now();

  // Clear all matrices
  for (int i = 0; i < 4; i++) {
    lc.clearDisplay(i);
  }

  // Display the time on the first two matrices
  displayTime(now.hour(), now.minute());

  // Display temperature on the third matrix
  displayNumber(temperature, 2);

  // Display humidity on the fourth matrix
  displayNumber(humidity, 3);

  delay(1000); // Update every second

  // Display the circle pattern
  displayPattern(circle);
  delay(1000);

  // Display the line pattern
  displayPattern(line);
  delay(1000);
}

void displayTime(int hour, int minute) {
  // Display hours
  lc.setDigit(0, 1, hour / 10, false);
  lc.setDigit(0, 0, hour % 10, false);

  // Display minutes
  lc.setDigit(1, 1, minute / 10, false);
  lc.setDigit(1, 0, minute % 10, false);
}

void displayNumber(float num, int matrix) {
  int intPart = (int)num;           // Integer part of the number
  
  lc.setDigit(matrix, 1, intPart / 10, false);  // Tens place of integer part
  lc.setDigit(matrix, 0, intPart % 10, false);  // Units place without decimal point
}

void displayPattern(byte pattern[8]) {
  for (int i = 0; i < 8; i++) {
    lc.setRow(0, i, pattern[i]);  // Display pattern on the first matrix
    lc.setRow(1, i, pattern[i]);  // Display pattern on the second matrix
    lc.setRow(2, i, pattern[i]);  // Display pattern on the third matrix
    lc.setRow(3, i, pattern[i]);  // Display pattern on the fourth matrix
  }
}