/*
  MSJ Researchers World
  Date - 2nd DEC 2024
  Mentor - Mr. Siranjeevi M
  Contact - 7373771991
*/

#include <TM1637Display.h>
#include <Wire.h>
#include <RTClib.h>

// Initialize TM1637 display (CLK, DIO pins)
TM1637Display display(5, 3);

// Initialize RTC
RTC_DS1307 rtc;

// Button pin
const int buttonPin = 4; // Button to toggle between time and date
bool showTime = true;     // Flag to show time or date

// Variable to store last button press time for debouncing
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;  // debounce delay in milliseconds

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

  // Initialize display
  display.setBrightness(7); // Adjust brightness (0-7)

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

  if (!rtc.isrunning()) {
    Serial.println("RTC is not running! Setting current time.");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__))); // Set RTC to compile time
  }

  // Initialize button pin
  pinMode(buttonPin, INPUT_PULLUP); // Enable internal pull-up resistor
}

void loop() {
  // Read the button state
  int buttonState = digitalRead(buttonPin);

  // Check if the button was pressed (LOW means pressed due to pull-up)
  if (buttonState == LOW) {
    // Debounce button press to avoid multiple toggles
    if (millis() - lastDebounceTime > debounceDelay) {
      showTime = !showTime;  // Toggle between time and date
      lastDebounceTime = millis();
    }
  }

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

  if (showTime) {
    // Display time in HH:MM format
    int displayTime = now.hour() * 100 + now.minute(); // HHMM format
    display.showNumberDecEx(displayTime, 0b01000000, true); // ":" separator
  } else {
    // Display date in DD:MM format
    int displayDate = now.day() * 100 + now.month(); // DDMM format
    display.showNumberDecEx(displayDate, 0b00000000, true); // No colon
  }

  delay(1000); // Update every second
}