#include <Adafruit_NeoPixel.h>

#define MATRIX_PIN 2
#define ROWS 8
#define COLS 8
#define NUM_PIXELS (ROWS * COLS)

Adafruit_NeoPixel matrix(NUM_PIXELS, MATRIX_PIN, NEO_GRB + NEO_KHZ800);

// Pola bitmap 5x7 untuk angka 0 sampai 9
const byte digits[10][7] = {
  {0b01110, 0b10001, 0b10001, 0b10001, 0b10001, 0b10001, 0b01110}, // 0
  {0b00100, 0b01100, 0b00100, 0b00100, 0b00100, 0b00100, 0b01110}, // 1
  {0b01110, 0b10001, 0b00001, 0b00110, 0b01000, 0b10000, 0b11111}, // 2
  {0b01110, 0b10001, 0b00001, 0b00110, 0b00001, 0b10001, 0b01110}, // 3
  {0b00010, 0b00110, 0b01010, 0b10010, 0b11111, 0b00010, 0b00010}, // 4
  {0b11111, 0b10000, 0b11110, 0b00001, 0b00001, 0b10001, 0b01110}, // 5
  {0b00110, 0b01000, 0b10000, 0b11110, 0b10001, 0b10001, 0b01110}, // 6
  {0b11111, 0b00001, 0b00010, 0b00100, 0b01000, 0b01000, 0b01000}, // 7
  {0b01110, 0b10001, 0b10001, 0b01110, 0b10001, 0b10001, 0b01110}, // 8
  {0b01110, 0b10001, 0b10001, 0b01111, 0b00001, 0b00010, 0b01100}  // 9
};

// Konversi koordinat (x, y) ke indeks pixel
// Catatan: Jika susunan matriks berbentuk Zig-Zag (Snake), ubah bagian x & y ini
int getPixelIndex(int x, int y) {
  return y * COLS + x;
}

void displayDigit(int num, uint32_t color) {
  matrix.clear(); // Bersihkan layar sebelum menampilkan angka baru

  // Offset x=1, y=0 untuk menempatkan pola 5x7 tepat di tengah matriks 8x8
  int offsetX = 1;
  int offsetY = 0;

  for (int row = 0; row < 7; row++) {
    for (int col = 0; col < 5; col++) {
      // Cek bit pada posisi (col, row)
      if ((digits[num][row] >> (4 - col)) & 0x01) {
        int index = getPixelIndex(col + offsetX, row + offsetY);
        matrix.setPixelColor(index, color);
      }
    }
  }
  matrix.show();
}

void setup() {
  matrix.begin();
  matrix.setBrightness(40); // Atur kecerahan (0 - 255) agar tidak terlalu silau
  matrix.show();
}

int count = 0;

void loop() {
  // Tampilkan angka dengan warna Biru: matrix.Color(red, green, blue)
  displayDigit(count, matrix.Color(0, 0, 150));

  // Naikkan counter 0-9
  count = (count + 1) % 10;

  delay(1000); // Tunda 1 detik tiap angka
}