#include <Wire.h>
#include <RTClib.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ST7789.h>

#define TFT_CS     10
#define TFT_RST    9
#define TFT_DC     8
#define TFT_WIDTH  240
#define TFT_HEIGHT 240

Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);
RTC_DS3231 rtc;

#define BLACK       0x0000
#define YELLOW      0xFFE0
#define BLUE        0x001F
#define GREEN       0x07E0
#define RED         0xF800
#define CYAN        0x07FF
#define MAGENTA     0xF81F
#define ORANGE      0xFD20

// Array of rainbow colors
uint16_t rainbowColors[] = {RED, ORANGE, YELLOW, GREEN, CYAN, BLUE, MAGENTA};

void setup() {
  Serial.begin(9600);
  Serial.println("Initializing...");

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

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

  tft.init(TFT_WIDTH, TFT_HEIGHT);
  tft.setRotation(2);
  tft.fillScreen(BLACK); // Clear the screen
  Serial.println("Display initialized.");
}

void loop() {
  DateTime now = rtc.now();

  // Clear the area where the digital clock will be displayed
  tft.fillRect(0, 0, TFT_WIDTH, TFT_HEIGHT, WDIE);

  // Cycle through rainbow colors based on the current second
  uint16_t currentColor = rainbowColors[now.second() % 7];

  // Display digital time on TFT with the rainbow color
  tft.setCursor(40, 130);
  tft.setTextSize(4);
  tft.setTextColor(currentColor);

  if (now.hour() < 10) tft.print('0'); // Add leading zero
  tft.print(now.hour());
  tft.print(':');
  
  if (now.minute() < 10) tft.print('0'); // Add leading zero
  tft.print(now.minute());
  tft.print(':');
  
  if (now.second() < 10) tft.print('0'); // Add leading zero
  tft.print(now.second());

  // Display "Arvind" in the same rainbow color
  tft.setCursor(60, 200);
  tft.setTextSize(2);
  tft.setTextColor(currentColor);
  tft.print("Arvind");

  // Draw the laughing emoji
  drawLaughingEmoji(180, 70); // Position the emoji at (180, 70)

  delay(1000); // Update every second
}

void drawLaughingEmoji(int x, int y) {
  // Draw the face (yellow circle)
  tft.fillCircle(x, y, 30, YELLOW);

  // Draw the eyes (blue circles)
  tft.fillCircle(x - 10, y - 10, 5, BLUE);
  tft.fillCircle(x + 10, y - 10, 5, BLUE);

  // Draw the mouth (simple arc approximation using lines)
  tft.drawLine(x - 15, y + 10, x - 5, y + 20, BLACK);
  tft.drawLine(x - 5, y + 20, x + 5, y + 20, BLACK);
  tft.drawLine(x + 5, y + 20, x + 15, y + 10, BLACK);

  // Draw the tears (blue drops)
  tft.fillCircle(x - 15, y - 5, 4, BLUE);
  tft.fillCircle(x + 15, y - 5, 4, BLUE);
}