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

#define TFT_CS 53
#define TFT_DC 9
#define TFT_RST 7

volatile bool analogClock = false;
volatile bool buttonPressed = false;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

RTC_DS1307 rtc; // create an instance of the RTC_DS1307 class

volatile int interruptCounter; // variable to store the number of timer interrupts
const int interruptInterval = 1000; // interval for timer interrupts in milliseconds

void setup() {
  Serial.begin(9600); // initialize serial communication at 9600 bits per second
  tft.begin();               // Initialize TFT display
  tft.setRotation(0);        // Set display rotation (if needed)
  tft.fillScreen(ILI9341_BLACK);  // Fill screen with black color
  tft.setTextColor(ILI9341_YELLOW);
  Wire.begin(); // initialize I2C communication
  rtc.begin(); // initialize RTC communication
  if (!rtc.isrunning()) { // check if RTC is running
    Serial.println("RTC is NOT running!"); // display error message if RTC is not running
  }
  else {
    Serial.println("RTC is running.");
  }

  // set up timer interrupt
  noInterrupts(); // disable interrupts
  TCCR1A = 0; // set TCCR1A register to 0
  TCCR1B = 0; // set TCCR1B register to 0
  TCNT1 = 0; // set TCNT1 register to 0
  OCR1A = 15624; // set OCR1A register to match interruptInterval
  TCCR1B |= (1 << WGM12); // set WGM12 bit for CTC mode
  TCCR1B |= (1 << CS12) | (1 << CS10); // set prescaler to 1024
  TIMSK1 |= (1 << OCIE1A); // enable timer interrupt
  interrupts(); // enable interrupts
  tft.begin();
  tft.fillScreen(ILI9341_BLACK);
  tft.setTextColor(ILI9341_WHITE, ILI9341_BLACK);  // White on black
  
  tft.setTextSize(3);  // large letters
  tft.setRotation(0); // horizontal display     
}

ISR(TIMER1_COMPA_vect) {
  interruptCounter++; // increment interrupt counter
}

void loop() {
  // DateTime now = rtc.now(); // get current time from RTC
  // Serial.print(now.hour(), DEC); // display hours
  // Serial.print(':');
  // Serial.print(now.minute(), DEC); // display minutes
  // Serial.print(':');
  // Serial.print(now.second(), DEC); // display seconds
  // Serial.println();

  // delay(1000); // delay for 1 second
  tft.setCursor(0, tft.height()/2-60);
  DateTime now = rtc.now();
  tft.println("Current time: ");
  tft.print(now.year(), DEC);
  tft.print('/');
  tft.print(now.month(), DEC);
  tft.print('/');
  tft.print(now.day(), DEC);
  tft.print('\n');
  tft.print('\n');
  tft.println(daysOfTheWeek[now.dayOfTheWeek()]);
  tft.print('\n');
  if(now.hour()<10){
    tft.print("0");
  }
  tft.print(now.hour(), DEC);
  tft.print(':');
  if(now.minute()<10){
    tft.print("0");
  }
  tft.print(now.minute(), DEC);
  tft.print(':');
  if(now.second()<10){
    tft.print("0");
  }
  tft.print(now.second(), DEC);
}