/*
  A simple Pong game.
  https://notabug.org/Maverick/WokwiPong
  
  Based on Arduino Pong by eholk
  https://github.com/eholk/Arduino-Pong
*/

#include <SPI.h>
#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 = Adafruit_SSD1306(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire);

const float DEG2RAD = 0.0174532925; // Conversion factor for degrees to radians
const int centerX = SCREEN_WIDTH / 2;
const int centerY = SCREEN_HEIGHT / 2;
const int clockRadius = 30;

void setup() 
{
    display.begin(SSD1306_SWITCHCAPVCC, 0x3C);

    // Display the splash screen (we're legally required to do so)
    display.display();
    delay(2000); // Pause for 2 seconds
    display.clearDisplay();
    display.setTextColor(SSD1306_WHITE);
    display.setTextSize(1);
}

void loop() {
  display.clearDisplay();
  display.setCursor(10, 10);

  unsigned long currentMillis = millis();
  int h = (currentMillis / 3600000) % 12;
  int m = (currentMillis / 60000) % 60;
  int s = (currentMillis / 1000) % 60;

  // Display the digital time
  display.setTextSize(1);
  display.print("Time: ");
  if (h < 10) display.print("0");
  display.print(h);
  display.print(":");
  if (m < 10) display.print("0");
  display.print(m);
  display.print(":");
  if (s < 10) display.print("0");
  display.print(s);

  // Calculate the angles for clock hands
  float hourAngle = 90 - (h % 12 + m / 60.0) * 30;
  float minuteAngle = 90 - m * 6;
  float secondAngle = 90 - s * 6;

  // Draw clock face
  display.drawCircle(centerX, centerY, clockRadius, SSD1306_WHITE);

  // Draw clock hands
  drawClockHand(centerX, centerY, hourAngle, clockRadius - 10, 3, SSD1306_WHITE);
  drawClockHand(centerX, centerY, minuteAngle, clockRadius - 5, 2, SSD1306_WHITE);
  drawClockHand(centerX, centerY, secondAngle, clockRadius - 2, 1, SSD1306_WHITE);

  display.display();
  delay(1000); // Update every second
}

void drawClockHand(int x, int y, float angle, int length, int width, int color) {
  float radians = (angle - 90) * DEG2RAD;
  int x2 = x + length * cos(radians);
  int y2 = y + length * sin(radians);
  display.drawLine(x, y, x2, y2, color);
}