#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"

#include <WiFi.h>
#include <NTPClient.h> 
#include <WiFiUdp.h> 


#define TFT_DC 14
#define TFT_CS 27
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);
int Sx[60],Mx[60],Hx[30];
int Sy[60],My[60],Hy[30];
int center_x=120;
int center_y=120;
int seconds_hand_len = 80;
int minutes_hand_len = 60;
int hours_hand_len = 40;
int clock_radius=100;
int hours_x=0;
int hours_y=0;

String SSID = "Wokwi-GUEST";
String PASS = "";

const long utcOffsetInSeconds = 7200+3600;
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds);

int hours;
int minutes;
int seconds;

long int startMillis=0;
int period = 1000;
long int currentMillis=0;

int prevS;
int prevM;


GFXcanvas16 canvas(240, 240);

void drawClock();


void setup() {
 Serial.begin(115200);
 Serial.print("Connecting to WiFi");
 WiFi.begin(SSID, PASS);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }

timeClient.begin();
 if (timeClient.update()) {
      Serial.println("Synchronized with NTP.");
    } else {
      Serial.println("Error synchronizing with NTP.");
    }
  

hours = timeClient.getHours();
minutes = timeClient.getMinutes();
seconds = timeClient.getSeconds();

Serial.print(hours);Serial.print(":");
Serial.print(minutes);Serial.print(":");
Serial.print(seconds);Serial.println("");
 tft.begin();
 drawClockCanvas();

 tft.drawRGBBitmap(0, 0, canvas.getBuffer(), canvas.width(), canvas.height());
 prevS=seconds;
 prevM=minutes;

}



void loop() { 
   currentMillis = millis();
  

if(currentMillis - startMillis >= period) {
  tft.drawLine(120,120,Sx[prevS],Sy[prevS],ILI9341_BLACK); 
  
  
  hours = timeClient.getHours();
minutes = timeClient.getMinutes();
seconds = timeClient.getSeconds();
prevS = seconds;

Serial.print(hours);Serial.print(":");
Serial.print(minutes);Serial.print(":");

Serial.print(seconds);Serial.println("");
  
  
  
  
  if(seconds>=59) {seconds=0;prevS=0; minutes++; 
       if(minutes>=59) minutes=0;
       tft.drawLine(120,120,Mx[prevM],My[prevM],ILI9341_BLACK);
       tft.drawLine(120,120,Mx[minutes],My[minutes],ILI9341_YELLOW); 
       prevM=minutes;
       hours_x = int(hours_hand_len * sin(radians(hours * 30 + 0.5 * minutes)) + center_x);
       hours_y = int(-1 * hours_hand_len * cos(radians(hours * 30 + 0.5 * minutes )) + center_y);
       tft.drawLine(120,120,hours_x,hours_y,ILI9341_RED);
      
      }
  tft.drawLine(120,120,Sx[seconds],Sy[seconds],ILI9341_GREEN); 
  if(minutes<=seconds) tft.drawLine(120,120,Mx[minutes],My[minutes],ILI9341_YELLOW); 
  //if(hours<=seconds)
   tft.drawLine(120,120,hours_x,hours_y,ILI9341_RED);
  startMillis=currentMillis;
}

}


void drawClock(){

for(int secs=0;secs<60;secs++){
 Sx[secs] = int(seconds_hand_len * sin(radians(secs * 6)) + center_x);
 Sy[secs] = int(-1 * seconds_hand_len * cos(radians(secs * 6)) + center_y);
}

for(int mins=0;mins<60;mins++){
 Mx[mins] = int(minutes_hand_len * sin(radians(mins * 6)) + center_x);
 My[mins] = int(-1 * minutes_hand_len * cos(radians(mins * 6)) + center_y);
}
  tft.begin();

  tft.drawCircle(center_x,center_y,clock_radius,ILI9341_WHITE);
  tft.drawCircle(center_x,center_y,clock_radius+1,ILI9341_WHITE);
 
for(int hrs=0;hrs<12;hrs++){

hours_x = int(clock_radius * sin(radians(hrs * 30 )) + center_x);
hours_y = int(-1 *clock_radius * cos(radians(hrs * 30)) + center_y);
tft.drawLine(120,120,hours_x,hours_y,ILI9341_WHITE);
}
  tft.fillCircle(120,120,clock_radius-10,ILI9341_BLACK);

  tft.setCursor(center_x,center_y-clock_radius+10);
  tft.print("12");
  tft.setCursor(center_x,center_y+clock_radius-10);
  tft.print("6");
  tft.setCursor(center_x+clock_radius-10,center_y);
  tft.print("3");
  tft.setCursor(center_x-clock_radius+10,center_y);
  tft.print("9");
 

hours_x = int(hours_hand_len * sin(radians(hours * 30 + 0.5 * minutes)) + center_x);
hours_y = int(-1 * hours_hand_len * cos(radians(hours * 30 + 0.5 * minutes )) + center_y);
       

 tft.drawLine(120,120,Sx[seconds],Sy[seconds],ILI9341_GREEN);
 tft.drawLine(120,120,Mx[minutes],My[minutes],ILI9341_YELLOW);
 tft.drawLine(120,120,hours_x,hours_y,ILI9341_RED);

}


void drawClockCanvas(){

for(int secs=0;secs<60;secs++){
 Sx[secs] = int(seconds_hand_len * sin(radians(secs * 6)) + center_x);
 Sy[secs] = int(-1 * seconds_hand_len * cos(radians(secs * 6)) + center_y);
}

for(int mins=0;mins<60;mins++){
 Mx[mins] = int(minutes_hand_len * sin(radians(mins * 6)) + center_x);
 My[mins] = int(-1 * minutes_hand_len * cos(radians(mins * 6)) + center_y);
}
  //tft.begin();

  canvas.drawCircle(center_x,center_y,clock_radius,ILI9341_WHITE);
  canvas.drawCircle(center_x,center_y,clock_radius+1,ILI9341_WHITE);
 
for(int hrs=0;hrs<12;hrs++){

hours_x = int(clock_radius * sin(radians(hrs * 30 )) + center_x);
hours_y = int(-1 *clock_radius * cos(radians(hrs * 30)) + center_y);
canvas.drawLine(120,120,hours_x,hours_y,ILI9341_WHITE);
}
  canvas.fillCircle(120,120,clock_radius-10,ILI9341_BLACK);

  canvas.setCursor(center_x,center_y-clock_radius+10);
  canvas.print("12");
  canvas.setCursor(center_x,center_y+clock_radius-10);
  canvas.print("6");
  canvas.setCursor(center_x+clock_radius-10,center_y);
  canvas.print("3");
  canvas.setCursor(center_x-clock_radius+10,center_y);
  canvas.print("9");
 

hours_x = int(hours_hand_len * sin(radians(hours * 30 + 0.5 * minutes)) + center_x);
hours_y = int(-1 * hours_hand_len * cos(radians(hours * 30 + 0.5 * minutes )) + center_y);
       

 canvas.drawLine(120,120,Sx[seconds],Sy[seconds],ILI9341_GREEN);
 canvas.drawLine(120,120,Mx[minutes],My[minutes],ILI9341_YELLOW);
 canvas.drawLine(120,120,hours_x,hours_y,ILI9341_RED);

}