#include <SPI.h>
#include <Wire.h>
#include <WiFi.h>
#include <time.h>
#include <U8g2lib.h>



U8G2_SH1106_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

time_t rawtime = time(nullptr);
struct tm* timeinfo = localtime(&rawtime);

int GMTOffset = -28800;  //Replace with your GMT Offset in seconds
int daylightOffset = 0;  //Replace with your daylight savings offset in seconds

int center_x = 64; // display x center, 64px for the 128x128px display
int center_y = 32;

void setup();
void screenA();
void loop() ;



void setup() {

  // put your setup code here, to run once:
  Serial.begin(115200);
  u8g2.setColorIndex(1);  // set the color to white
  u8g2.begin();
  delay(2000);
  u8g2.clearBuffer();


  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
  delay(250);
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
  configTime(GMTOffset, daylightOffset, "pool.ntp.org","time.nist.gov");
  screenA();



}

void screenA(){
  u8g2.setColorIndex(1);
  u8g2.clearBuffer();
  int radius = 35;
  u8g2.drawCircle(64, 32, 2, U8G2_DRAW_ALL);
  //draw clock
  for( int i=0; i < 360;i= i + 30 ){
  float angle = i ; 
  angle=(angle/57.29577951) ; 
  int x1=(64+(sin(angle)*radius));
  int y1=(32-(cos(angle)*radius));
  int x2=(64+(sin(angle)*(radius-5)));
  int y2=(32-(cos(angle)*(radius-5)));
  u8g2.drawLine(x1,y1,x2,y2);
  }

  //draw second hand
  u8g2.setColorIndex(1);
  float angle = timeinfo->tm_sec*6 ;
  angle=(angle/57.29577951) ; 
  int x2=(64+(sin(angle)*(radius)));
  int y2=(32-(cos(angle)*(radius)));
  u8g2.drawLine(64,32,x2,y2);

  // draw minute hand
  angle = timeinfo->tm_min * 6 ;
  angle=(angle/57.29577951) ; 
  x2=(64+(sin(angle)*(radius-3)));
  y2=(32-(cos(angle)*(radius-3)));
  u8g2.drawLine(64,32,x2,y2);

  // draw hour hand
  angle = timeinfo->tm_hour * 30 + int((timeinfo->tm_min / 12) * 6 );
  angle=(angle/57.29577951) ; 
  x2=(64+(sin(angle)*(radius-11)));
  y2=(32-(cos(angle)*(radius-11)));
  u8g2.drawLine(64,32,x2,y2);
  delay(100);
  u8g2.sendBuffer();
  
  //display.clearDisplay();
  }


void loop(){
  rawtime = time(nullptr);
  timeinfo = localtime(&rawtime);
   screenA();

}