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

// OLED Config
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// Eye and Pupil Sizes (lebih besar dan proporsional)
int eyeW = 40;  // Lebar mata
int eyeH = 40;  // Tinggi mata
int pupilW = 12; // Lebar pupil
int pupilH = 12; // Tinggi pupil

// Eye positions
int leftEyeX = 32;
int rightEyeX = 96;
int eyeY = 32;

// Variables for random movement and blinking
unsigned long lastMoveTime = 0;
unsigned long moveInterval = 1000;
unsigned long lastBlinkTime = 0;
unsigned long blinkInterval = 3000;
int pupilOffsetX = 0;
int pupilOffsetY = 0;

void setup() {
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.display();
  randomSeed(analogRead(A0)); // Seed for random numbers
}

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

  // Acak gerakan mata setiap interval
  if (now - lastMoveTime > moveInterval) {
    pupilOffsetX = random(-8, 9);
    pupilOffsetY = random(-8, 9);
    lastMoveTime = now;
  }

  // Animasi kedip acak
  if (now - lastBlinkTime > blinkInterval) {
    blink();
    lastBlinkTime = now;
    blinkInterval = random(1000, 5000); // Kedip antara 1 hingga 5 detik
  }

  // Tampilkan ekspresi kaget secara acak
  if (random(0, 500) == 1) { // Peluang kecil untuk kaget
    surpriseEyes();
    delay(1000); // Tahan ekspresi kaget
  }
  
  // Tampilkan mata normal dengan gerakan acak
  drawEyes(pupilOffsetX, pupilOffsetY);
}

// ====== FUNCTION: DRAW TWO BOX EYES + MOVING PUPIL ======
void drawEyes(int offsetX, int offsetY) {
  display.clearDisplay();
  
  // Left Eye Outline
  display.fillRoundRect(leftEyeX - eyeW / 2, eyeY - eyeH / 2, eyeW, eyeH, 4, SSD1306_WHITE);
  // Right Eye Outline
  display.fillRoundRect(rightEyeX - eyeW / 2, eyeY - eyeH / 2, eyeW, eyeH, 4, SSD1306_WHITE);

  // Pupils (black squares)
  display.fillRoundRect(leftEyeX - pupilW / 2 + offsetX, eyeY - pupilH / 2 + offsetY, pupilW, pupilH, 2, SSD1306_BLACK);
  display.fillRoundRect(rightEyeX - pupilW / 2 + offsetX, eyeY - pupilH / 2 + offsetY, pupilW, pupilH, 2, SSD1306_BLACK);

  display.display();
  delay(50); // Tambahkan jeda agar animasi lebih halus
}

// ====== FUNCTION: BLINK ANIMATION ======
void blink() {
  drawEyes(0, 0); // Open
  delay(50);

  display.clearDisplay();
  // Eyes closed - draw lines
  display.drawLine(leftEyeX - eyeW / 2, eyeY, leftEyeX + eyeW / 2, eyeY, SSD1306_WHITE);
  display.drawLine(rightEyeX - eyeW / 2, eyeY, rightEyeX + eyeW / 2, eyeY, SSD1306_WHITE);
  display.display();
  delay(150);

  drawEyes(0, 0); // open again
}

// ====== FUNCTION: SURPRISE EYES ======
void surpriseEyes() {
  display.clearDisplay();

  // Draw open circles for a surprised look
  display.fillCircle(leftEyeX, eyeY, eyeW / 2, SSD1306_WHITE);
  display.fillCircle(rightEyeX, eyeY, eyeW / 2, SSD1306_WHITE);
  
  // Draw small, centered pupils
  display.fillRoundRect(leftEyeX - pupilW / 2, eyeY - pupilH / 2, pupilW, pupilH, 2, SSD1306_BLACK);
  display.fillRoundRect(rightEyeX - pupilW / 2, eyeY - pupilH / 2, pupilW, pupilH, 2, SSD1306_BLACK);

  display.display();
}

// happyEyes() dan sadEyes()
// Anda bisa tambahkan kembali fungsi happyEyes() dan sadEyes() ke dalam loop utama
// jika ingin ekspresi tersebut muncul.