#include <Arduino.h>

// This works kalo delaynya 500. Dibawah itu cacat. Harusnya normal kah di arduino beneran?
// Define pins for the shift register
#define DATA_PIN 11
#define CLOCK_PIN 12
#define LATCH_PIN 8


// Define pins for the digits
// #define DIGIT1_PIN 9
// #define DIGIT2_PIN 10
// #define DIGIT3_PIN 13
#define DIGIT1_PIN A5
#define DIGIT2_PIN A4
#define DIGIT3_PIN A3

int digit1 = 0;
// Segment values for common cathode 7-segment display
// byte segmentDigits[] = {
//   0b11000000, // 0
//   0b11111001, // 1
//   0b10100100, // 2
//   0b10110000, // 3
//   0b10011001, // 4
//   0b10010010, // 5
//   0b10000010, // 6
//   0b11111000, // 7
//   0b10000000, // 8
//   0b10010000  // 9
// };

int segmentDigits[] = {126,48,109,121,51,91,95,112,127,123};

// Display buffer
byte displayBuffer[3] = {0, 0, 0};
unsigned long previousMillis = 0; // Stores the last time the message was printed
const long interval = 1000; // Interval at which to print (milliseconds)

// Function to update the display
void updateDisplay() {
  for (int i = 0; i < 3; i++) {
    // Activate the current digit
    digitalWrite(DIGIT1_PIN, i == 0 ? LOW : HIGH);
    digitalWrite(DIGIT2_PIN, i == 1 ? LOW : HIGH);
    digitalWrite(DIGIT3_PIN, i == 2 ? LOW : HIGH);
    
    // Send the segment data
    // digitalWrite(LATCH_PIN, LOW);
    shiftOut(DATA_PIN, CLOCK_PIN, LSBFIRST, segmentDigits[displayBuffer[i]]);
    digitalWrite(LATCH_PIN, LOW);
    digitalWrite(LATCH_PIN, HIGH);
    // Force 0 dulu
    shiftOut(DATA_PIN, CLOCK_PIN, LSBFIRST, 0);
    digitalWrite(LATCH_PIN, LOW);
    digitalWrite(LATCH_PIN, HIGH);
    // Small delay to ensure the digit is visible
    delay(10);
  }
}

void setup() {
  pinMode(DATA_PIN, OUTPUT);
  pinMode(CLOCK_PIN, OUTPUT);
  pinMode(LATCH_PIN, OUTPUT);
  
  pinMode(DIGIT1_PIN, OUTPUT);
  pinMode(DIGIT2_PIN, OUTPUT);
  pinMode(DIGIT3_PIN, OUTPUT);
  
  // Initialize all digit pins to HIGH (off)
  digitalWrite(DIGIT1_PIN, HIGH);
  digitalWrite(DIGIT2_PIN, HIGH);
  digitalWrite(DIGIT3_PIN, HIGH);
}

void loop() {
  // Update the display buffer with the digits you want to show
  // displayBuffer[0] = 1; // First digit
  displayBuffer[1] = 7; // Second digit
  displayBuffer[2] = 7; // Third digit
  
  // Update the display
  updateDisplay();

  
  unsigned long currentMillis = millis(); // Get the current time

  if (currentMillis - previousMillis >= interval) {
    // Save the last time the message was printed
    previousMillis = currentMillis;

    // Print the message to the Serial Monitor
    Serial.print("Hello, this message prints every 2 seconds!");
    digit1++;
    displayBuffer[0] = digit1;
    if(digit1 >9){
      digit1=0;
    }
  }
}