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

// Constants
#define TFT_CS     10
#define TFT_RST    9
#define TFT_DC     8

#define WIDTH      320
#define HEIGHT     240
#define CENTER_X   WIDTH / 2
#define CENTER_Y   HEIGHT / 2
#define RADIUS     (CENTER_X < CENTER_Y ? CENTER_X : CENTER_Y) - 10

// Create the display
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

void setup() {
  tft.begin();
  tft.setRotation(3); // Landscape mode

  // Draw clock face and hands once
  drawClockFace();
}

void loop() {
  // Get current time
  time_t now = time(NULL);
  struct tm *current_time = localtime(&now);
  int seconds = current_time->tm_sec;
  int minutes = current_time->tm_min;
  int hours = current_time->tm_hour % 12;

  // Clear the screen
  tft.fillScreen(ILI9341_BLACK);

  // Draw clock face and hands
  drawClockFace();
  drawClockHands(seconds, minutes, hours);

  // Cap the frame rate
  delay(1000);
}

void drawClockFace() {
  tft.fillCircle(CENTER_X, CENTER_Y, RADIUS, ILI9341_WHITE);

  for (int i = 0; i < 12; ++i) {
    float angle = i * 2 * M_PI / 12;
    int x1 = CENTER_X + cos(angle) * (RADIUS - 5);
    int y1 = CENTER_Y + sin(angle) * (RADIUS - 5);
    int x2 = CENTER_X + cos(angle) * (RADIUS - 15);
    int y2 = CENTER_Y + sin(angle) * (RADIUS - 15);

    tft.drawLine(x1, y1, x2, y2, ILI9341_WHITE);
  }
}

void drawClockHands(int seconds, int minutes, int hours) {
  drawHand(seconds, 60, 2, ILI9341_RED);
  drawHand(minutes, 60, 4, ILI9341_GREEN);
  drawHand(hours * 5 + minutes / 12, 60, 6, ILI9341_BLUE);
}

void drawHand(int value, int range, int length, uint16_t color) {
  float angle = (value * 360.0f / range - 90) * M_PI / 180;
  int x2 = CENTER_X + cos(angle) * (RADIUS - length);
  int y2 = CENTER_Y + sin(angle) * (RADIUS - length);

  tft.drawLine(CENTER_X, CENTER_Y, x2, y2, color);
}