#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_ST7789.h> // Hardware-specific library for ST7789
#include <math.h>            // For trigonometric functions
#include <TimeLib.h>         // Arduino Time library for timekeeping


#define TFT_CS     10
#define TFT_RST    9  // Or set to -1 and connect to Arduino RESET pin
#define TFT_DC     8
#define TFT_MOSI   11  // Data out
#define TFT_SCLK   13  // Clock out


#define CLOCK_RADIUS 90      // Radius of the clock
#define HOUR_HAND_LENGTH 50  // Length of the hour hand
#define MINUTE_HAND_LENGTH 70 // Length of the minute hand
#define SECOND_HAND_LENGTH 80 // Length of the second hand


Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);


void setup() {
  tft.init(240, 280); // Initialize ST7789 with 240x280 resolution
  tft.setRotation(1); // Set display rotation (0,1,2,3)


  tft.fillScreen(ST77XX_BLACK); // Clear the screen with black color
}


void drawClock() {
  // Clear the area where the clock hands were previously drawn
  tft.fillCircle(120, 140, 2, ST77XX_BLACK);
  tft.drawLine(120, 140, 120 + HOUR_HAND_LENGTH * cos((6 * hour() - 90) * PI / 180), 140 + HOUR_HAND_LENGTH * sin((6 * hour() - 90) * PI / 180), ST77XX_BLACK);
  tft.drawLine(120, 140, 120 + MINUTE_HAND_LENGTH * cos((6 * minute() - 90) * PI / 180), 140 + MINUTE_HAND_LENGTH * sin((6 * minute() - 90) * PI / 180), ST77XX_BLACK);
  tft.drawLine(120, 140, 120 + SECOND_HAND_LENGTH * cos((6 * second() - 90) * PI / 180), 140 + SECOND_HAND_LENGTH * sin((6 * second() - 90) * PI / 180), ST77XX_BLACK);


  // Draw clock hands
  tft.drawLine(120, 140, 120 + HOUR_HAND_LENGTH * cos((6 * hour() - 90) * PI / 180), 140 + HOUR_HAND_LENGTH * sin((6 * hour() - 90) * PI / 180), ST77XX_WHITE);
  tft.drawLine(120, 140, 120 + MINUTE_HAND_LENGTH * cos((6 * minute() - 90) * PI / 180), 140 + MINUTE_HAND_LENGTH * sin((6 * minute() - 90) * PI / 180), ST77XX_WHITE);
  tft.drawLine(120, 140, 120 + SECOND_HAND_LENGTH * cos((6 * second() - 90) * PI / 180), 140 + SECOND_HAND_LENGTH * sin((6 * second() - 90) * PI / 180), ST77XX_RED);


  // Draw clock face
  tft.fillCircle(120, 140, 2, ST77XX_WHITE); // Draw center point
  for (int i = 0; i < 360; i += 30) {
    float angle = i * PI / 180;
    tft.drawPixel(120 + CLOCK_RADIUS * cos(angle), 140 + CLOCK_RADIUS * sin(angle), ST77XX_WHITE);
  }
}


void loop() {
  drawClock();
  delay(1000); // Update every second
}