#include <Adafruit_ILI9341.h>
#include <Adafruit_GFX.h>
#include <SPI.h>
#include <Wire.h>
#include <RTClib.h>

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

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

RTC_DS3231 rtc;

void setup() {
  tft.begin();
  tft.setRotation(3);

  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }

  if (rtc.lostPower()) {
    Serial.println("RTC lost power, let's set the time!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  Serial.begin(9600);
}

void drawClock() {
  DateTime now = rtc.now();
  int hour = now.hour();
  int minute = now.minute();
  int second = now.second();

  // Clear previous clock hands
  tft.fillCircle(160, 120, 90, ILI9341_BLACK);

  // Draw clock face
  tft.fillCircle(160, 120, 100, ILI9341_CASET);
  tft.fillCircle(160, 120, 5, ILI9341_RED);

  // Draw hour hand
  int hourHandLength = 50;
  int hourHandAngle = map(hour % 12, 0, 12, 0, 360) - 90;
  drawHand(160, 120, hourHandLength, hourHandAngle, ILI9341_PWCTR1);

  // Draw minute hand
  int minuteHandLength = 70;
  int minuteHandAngle = map(minute, 0, 60, 0, 360) - 90;
  drawHand(160, 120, minuteHandLength, minuteHandAngle, ILI9341_RED);

  // Draw second hand
  int secondHandLength = 90;
  int secondHandAngle = map(second, 0, 60, 0, 360) - 90;
  drawHand(160, 120, secondHandLength, secondHandAngle, ILI9341_YELLOW);
}

void drawHand(int x, int y, int length, int angle, uint16_t color) {
  int x2 = x + length * cos(angle * PI / 180);
  int y2 = y + length * sin(angle * PI / 180);
  tft.drawLine(x, y, x2, y2, color);
}

void loop() {
  drawClock();
  delay(5000);  // Update every second
}