#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>

#define MATRIX_WIDTH 7
#define MATRIX_HEIGHT 12
#define PIN 3

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(MATRIX_WIDTH, MATRIX_HEIGHT, PIN,
    NEO_MATRIX_TOP + NEO_MATRIX_LEFT +
    NEO_MATRIX_COLUMNS + NEO_MATRIX_ZIGZAG,
    NEO_GRB + NEO_KHZ800);


const uint16_t colors[] = {
  matrix.Color(0, 0, 255), matrix.Color(255, 0, 0)
};

int x = matrix.width();
const char* text = "STACKER";
int strobeIndex = 0;

// State variable using integers
int currentState = 0; // 0 for STROBE, 1 for SCROLL

// Timing variables
unsigned long previousMillis = 0;
const long strobeInterval = 300; // Time between strobe flashes
const long scrollInterval = 100;  // Time between scroll updates
unsigned long strobeTiming = 0; // To control strobe effect timing
bool isCharacterVisible = false; // Track visibility of the character

void setup() {
  Serial.begin(115200);
  matrix.begin();
  matrix.setTextWrap(false);
  matrix.setBrightness(255);

}

void loop() {
  unsigned long currentMillis = millis();

  switch (currentState) {
    case 0: // STROBE
      if (currentMillis - previousMillis >= strobeInterval) {
        previousMillis = currentMillis; // Update the last time
        strobe();
      }
      break;

    case 1: // SCROLL
      if (currentMillis - previousMillis >= scrollInterval) {
        previousMillis = currentMillis; // Update the last time
        scroll();
      }
      break;
  }
}

void scroll() {
  matrix.fillScreen(0); // Turn off all the LEDs
  matrix.setTextColor(colors[0]); // Set text color
  matrix.setCursor(x, 2);
  matrix.print(text);

  x--; // Move left

  // Reset position if the text has completely scrolled off the screen
  if (x < -56) {
    x = matrix.width();
    currentState = 0;
  }

  matrix.show();
}

void strobe() {
  int textLength = strlen(text);

  if (strobeIndex < textLength) {
    unsigned long currentMillis = millis();

    if (currentMillis - strobeTiming >= strobeInterval / 2) { // Flash every half of the interval
      strobeTiming = currentMillis; // Update the last time

      if (isCharacterVisible) {
        matrix.fillScreen(0); // Clear the matrix
      } else {
        matrix.fillScreen(0); // Clear the matrix
        matrix.setTextColor(colors[1]); // Set text color

        // Display the current character
        matrix.setCursor(1, 2); // Fixed position
        matrix.print(text[strobeIndex]);
      }

      matrix.show(); // Update display
      isCharacterVisible = !isCharacterVisible; // Toggle visibility

      if (!isCharacterVisible) { // Move to the next character if the character was shown
        strobeIndex++;
        if (strobeIndex >= textLength) {
          strobeIndex = 0; // Reset index after displaying all characters
          currentState = 1; // Switch to scrolling
        }
      }
    }
  }
}