// AI generated.
// I asked Claude Haiku 4.5 to combine the two sketches.
// The original two sketches are in the txt files.

#include <Servo.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// ============ SERVO SETUP ============
Servo xServo;
Servo yServo;

int joystickXPin = A0;
int joystickYPin = A1;
int servoxPin = 9;
int servoyPin = 8;

int posX = 45;
int posY = 45;
int tolerance = 10;
int rychlost = 10;

// ============ DISPLAY SETUP ============
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

float pupilX = 64;
float pupilY = 32;

unsigned long dalsiMrknuti;

// ============================================================
// INITIALIZE
// ============================================================

void setup()
{
  xServo.attach(servoxPin);
  yServo.attach(servoyPin);

  Serial.begin(9600);

  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.display();

  randomSeed(analogRead(A0));

  pupilX = 64;
  pupilY = 32;

  nakresliOko(pupilX, pupilY, 42);

  nastavDalsiMrknuti();

  delay(1000);
}

// ============================================================
// MAIN LOOP
// ============================================================

void loop()
{
  int joystickX = analogRead(joystickXPin);
  int joystickY = analogRead(joystickYPin);

  Serial.print("X: ");
  Serial.print(joystickX);
  Serial.print(" Y: ");
  Serial.println(joystickY);

  // Map joystick values (0-1023) to servo angles (45-135)
  int targetX = map(joystickX, 0, 1023, 45, 135);
  int targetY = map(joystickY, 0, 1023, 45, 135);

  // Update servo positions
  xServo.write(targetX);
  yServo.write(targetY);

  // Map joystick to display coordinates (0-1023 -> 30-98 for X, 13-51 for Y)
  int displayX = map(joystickX, 0, 1023, 30, 98);
  int displayY = map(joystickY, 0, 1023, 13, 51);

  // Smooth eye movement to target
  koukniNa(displayX, displayY);

  // ============ BLINK TIMING ============
  if (millis() >= dalsiMrknuti)
  {
    mrkni();
    nastavDalsiMrknuti();
  }

  delay(50);
}

// ============================================================
// DRAW EYE
// ============================================================

void nakresliOko(float x, float y, int vyska)
{
  display.clearDisplay();

  display.fillRoundRect(
    x - 19,
    y - vyska / 2,
    38,
    vyska,
    9,
    SSD1306_WHITE
  );

  display.display();
}

// ============================================================
// SMOOTH EYE MOVEMENT
// ============================================================

void koukniNa(int x, int y)
{
  float startX = pupilX;
  float startY = pupilY;

  float dx = x - startX;
  float dy = y - startY;

  int vzdalenost = max(abs((int)dx), abs((int)dy));

  if (vzdalenost == 0)
    return;

  int kroky = max(10, vzdalenost / 2);

  for (int i = 1; i <= kroky; i++)
  {
    float t = (float)i / kroky;
    float p = t * t * (3.0 - 2.0 * t); // Smooth acceleration/deceleration

    pupilX = startX + dx * p;
    pupilY = startY + dy * p;

    nakresliOko(pupilX, pupilY, 42);

    delay(5);
  }

  pupilX = x;
  pupilY = y;

  nakresliOko(pupilX, pupilY, 42);
}

// ============================================================
// BLINK
// ============================================================

void mrkni()
{
  // Close
  for (int vyska = 42; vyska >= 2; vyska -= 3)
  {
    nakresliOko(pupilX, pupilY, vyska);
    delay(7);
  }

  delay(45);

  // Open
  for (int vyska = 2; vyska <= 42; vyska += 3)
  {
    nakresliOko(pupilX, pupilY, vyska);
    delay(7);
  }

  nakresliOko(pupilX, pupilY, 42);
}

// ============================================================
// SET NEXT BLINK TIME
// ============================================================

void nastavDalsiMrknuti()
{
  dalsiMrknuti = millis() + random(5000, 10001);
}