#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>

// --- TFT pins ---
#define TFT_CS   5
#define TFT_DC   2
#define TFT_RST  4

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

// --- Joystick pins ---
#define JOY_X   34   // horizontal axis
#define JOY_Y   35   // vertical axis
#define JOY_BTN 16   // button

// --- Cursor & Target ---
int cursorX = 120;
int cursorY = 160;
int targetX, targetY, targetR = 20;
int score = 0;

void newTarget() {
  targetX = random(40, tft.width() - 40);
  targetY = random(80, tft.height() - 40);
}

void drawScene() {
  tft.fillScreen(ILI9341_BLACK);

  // Score
  tft.setTextColor(ILI9341_WHITE);
  tft.setCursor(10, 10);
  tft.print("Score: ");
  tft.print(score);

  // Target
  tft.fillCircle(targetX, targetY, targetR, ILI9341_RED);
}

void setup() {
  Serial.begin(115200);
  tft.begin();
  tft.setRotation(0); // portrait mode
  pinMode(JOY_BTN, INPUT_PULLUP);

  randomSeed(analogRead(0));
  newTarget();
  drawScene();
}

void loop() {
  int rawX = analogRead(JOY_X);
  int rawY = analogRead(JOY_Y);

  // Deadzone around center
  int deadzone = 300;

  // Erase old cursor
  tft.fillCircle(cursorX, cursorY, 5, ILI9341_BLACK);

  // --- Mouse-like movement ---
  // Horizontal axis (fixed inversion)
  if (rawX < 2048 - deadzone) cursorX += 3; // move left
  if (rawX > 2048 + deadzone) cursorX -= 3; // move right

  // Vertical axis (already corrected)
  if (rawY < 2048 - deadzone) cursorY += 3; // move up
  if (rawY > 2048 + deadzone) cursorY -= 3; // move down

  // Clamp to screen bounds
  cursorX = constrain(cursorX, 0, tft.width()-1);
  cursorY = constrain(cursorY, 0, tft.height()-1);

  // Draw cursor
  tft.fillCircle(cursorX, cursorY, 5, ILI9341_WHITE);

  // Button press = click
  if (digitalRead(JOY_BTN) == LOW) {
    int dx = cursorX - targetX;
    int dy = cursorY - targetY;
    if (dx*dx + dy*dy <= targetR*targetR) {
      score++;
      newTarget();
      drawScene();
    }
    delay(200); // debounce
  }

  delay(30);
}