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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define SDA_PIN 4
#define SCL_PIN 5

int ekspresi = 0;
int frame = 0;
bool blink = false;
int loveY = 0;

// ❤️ LOVE
void drawHeart(int x, int y){
  display.fillCircle(x-4, y, 4, SSD1306_WHITE);
  display.fillCircle(x+4, y, 4, SSD1306_WHITE);
  display.fillTriangle(x-8, y, x+8, y, x, y+10, SSD1306_WHITE);
}

// 🌸 BLUSH
void drawBlush(){
  display.fillCircle(36, 42, 4, SSD1306_WHITE);
  display.fillCircle(92, 42, 4, SSD1306_WHITE);
}

// 👀 MATA BESAR + SPARKLE
void drawEyes(bool blinkMode){

  if(!blinkMode){
    display.fillRoundRect(24, 10, 36, 44, 14, SSD1306_WHITE);
    display.fillRoundRect(68, 10, 36, 44, 14, SSD1306_WHITE);

    // sparkle animasi
    display.fillCircle(38 + (frame%6), 20, 3, SSD1306_BLACK);
    display.fillCircle(82 + (frame%6), 20, 3, SSD1306_BLACK);
  } else {
    display.drawLine(30, 32, 54, 32, SSD1306_WHITE);
    display.drawLine(74, 32, 98, 32, SSD1306_WHITE);
  }
}

// 🙂 Mulut senyum kecil
void drawSmile(){
  display.drawCircle(64, 54, 10, SSD1306_WHITE);
  display.fillRect(54, 54, 20, 12, SSD1306_BLACK);
}

// 😮 Mulut O
void drawMouthO(){
  display.fillCircle(64, 54, 6, SSD1306_WHITE);
}

// 😭 Cry
void drawCry(){
  display.fillCircle(44, 30, 8, SSD1306_WHITE);
  display.fillCircle(84, 30, 8, SSD1306_WHITE);
  display.drawLine(44, 38, 44, 50, SSD1306_WHITE);
  display.drawLine(84, 38, 84, 50, SSD1306_WHITE);
}

// 😆 > <
void drawXEyes(){
  display.drawLine(30, 18, 58, 44, SSD1306_WHITE);
  display.drawLine(58, 18, 30, 44, SSD1306_WHITE);
  display.drawLine(70, 18, 98, 44, SSD1306_WHITE);
  display.drawLine(98, 18, 70, 44, SSD1306_WHITE);
}

void setup(){
  Wire.begin(SDA_PIN, SCL_PIN);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
}

void loop(){

  display.clearDisplay();

  switch(ekspresi){

    case 0: // NORMAL KAWAII
      drawEyes(blink);
      drawBlush();
      drawSmile();
      break;

    case 1: // LOVE FALLING
      drawEyes(false);
      drawBlush();
      drawSmile();
      drawHeart(40, loveY);
      drawHeart(88, loveY+10);
      loveY += 3;
      if(loveY > 64) loveY = 0;
      break;

    case 2: // CRY
      drawCry();
      drawMouthO();
      break;

    case 3: // > <
      drawXEyes();
      drawSmile();
      break;
  }

  display.display();
  delay(80);

  frame++;

  // kedip smooth
  if(frame % 40 == 0) blink = true;
  if(frame % 45 == 0) blink = false;

  // ganti ekspresi tiap beberapa detik
  if(frame % 300 == 0){
    ekspresi++;
    if(ekspresi > 3) ekspresi = 0;
  }
}