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

RTC_DS1307 rtc;

char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

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

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

void setup() {
  Serial.begin(115200);

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

  tft.begin();
  tft.setRotation(3);
}

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

  Serial.print("Current time: ");
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day(), DEC);
  Serial.print(" (");
  Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
  Serial.print(") ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();

  tft.fillScreen(ILI9341_BLACK);
  tft.setCursor(0, 0);
  tft.setTextSize(4);

  displayRainbowText("Dt ", now.year(), '/', now.month(), '/', now.day());
  tft.setCursor(0, 60);
  displayRainbowText("Day: ", daysOfTheWeek[now.dayOfTheWeek()]);
  tft.setCursor(0, 110);
  displayRainbowText("Time ", now.hour(), ':', now.minute(), ':', now.second());
   tft.setTextSize(3);
  tft.setTextColor(tft.color565(255, 255, 55)); // Set text color to yellow
  tft.setCursor(0, 160);
  tft.print(" by ARVIND PATIL");

  delay(3000);
}

void displayRainbowText(const char* prefix, int value1, char separator1, int value2, char separator2, int value3) {
  char buffer[20];
  sprintf(buffer, "%s%d%c%d%c%d", prefix, value1, separator1, value2, separator2, value3);

  for (int i = 0; i < strlen(buffer); ++i) {
    uint16_t color = Wheel(map(i, 0, strlen(buffer) - 1, 0, 255));
    tft.setTextColor(color);
    tft.print(buffer[i]);
  }
}

void displayRainbowText(const char* prefix, const char* value) {
  for (int i = 0; i < strlen(value); ++i) {
    uint16_t color = Wheel(map(i, 0, strlen(value) - 1, 0, 255));
    tft.setTextColor(color);
    tft.print(value[i]);
  }
}

uint16_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if (WheelPos < 85) {
    return tft.color565(255 - WheelPos * 3, 0, WheelPos * 3);
  } else if (WheelPos < 170) {
    WheelPos -= 85;
    return tft.color565(0, WheelPos * 3, 255 - WheelPos * 3);
  } else {
    WheelPos -= 170;
    return tft.color565(WheelPos * 3, 255 - WheelPos * 3, 0);
  }
}