#include <LedControl.h>

// MAX7219 Pins: DIN, CLK, CS (LOAD)
LedControl lc = LedControl(11, 13, 10, 1);

// Joystick Pins
const int VRx = A0;
const int VRy = A1;
const int SW  = 2;

// Controlled dot position
int playerX = 3;
int playerY = 3;

// Random dot position
int foodX = 5;
int foodY = 5;

// Timing
unsigned long lastMoveTime = 0;
unsigned long lastBlinkTime = 0;
const int moveDelay = 150;
const int blinkDelay = 500;

// Dead zone for joystick
const int deadZone = 100;

// Blink state
bool foodVisible = true;

void setup() {
  lc.shutdown(0, false);
  lc.setIntensity(0, 8);
  lc.clearDisplay(0);

  pinMode(VRx, INPUT);
  pinMode(VRy, INPUT);
  pinMode(SW, INPUT_PULLUP);

  randomSeed(analogRead(0)); // Seed random for food
  spawnFood();
}

void loop() {
  // Handle joystick movement
  if (millis() - lastMoveTime > moveDelay) {
    int xVal = analogRead(VRx);
    int yVal = analogRead(VRy);

    if (xVal < (512 - deadZone)) playerX--;
    else if (xVal > (512 + deadZone)) playerX++;

    if (yVal < (512 - deadZone)) playerY++;
    else if (yVal > (512 + deadZone)) playerY--;

    // Wrap around edges
    playerX = (playerX + 8) % 8;
    playerY = (playerY + 8) % 8;

    lastMoveTime = millis();
  }

  // Handle blinking of food
  if (millis() - lastBlinkTime > blinkDelay) {
    foodVisible = !foodVisible;
    lastBlinkTime = millis();
  }

  // Check collision
  if (playerX == foodX && playerY == foodY) {
    spawnFood();
    foodVisible = true;
    delay(200); // Prevent rapid re-collection
  }

  // Draw everything
  lc.clearDisplay(0);
  lc.setLed(0, playerY, playerX, true); // Controlled dot
  if (foodVisible) {
    lc.setLed(0, foodY, foodX, true);   // Blinking dot
  }

  delay(10); // Small delay to avoid flickering
}

void spawnFood() {
  do {
    foodX = random(0, 8);
    foodY = random(0, 8);
  } while (foodX == playerX && foodY == playerY); // Don't spawn on player
}