#include <WiFi.h>
#include <NTPClient.h>
#include <WiFiUdp.h>
#include <Wire.h>
#include "RTClib.h"
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <U8g2_for_Adafruit_GFX.h>

Adafruit_SSD1306 display = Adafruit_SSD1306(128, 64, &Wire, -1); 
U8G2_FOR_ADAFRUIT_GFX u8g2_for_adafruit_gfx;

RTC_DS1307 rtc;

char days[7][12] = {"Minggu", "Senin", "Selasa", "Rabu", "Kamis", "Jum'at", "Sabtu"};
const long utcOffsetInSeconds = 7 * 3600;  // Adjust this based on your timezone.... 7 is for WIB +7 
const char* ssid = "Wokwi-GUEST";
const char* password = "";

WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds);

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

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { 
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  u8g2_for_adafruit_gfx.begin(display); // connect u8g2 procedures to Adafruit GFX
  delay(2000);

  WiFi.begin(ssid, password);
  delay(3000);
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    while (1) delay(10);
  }
  timeClient.begin();
  timeClient.update();
  if (WiFi.status() == WL_CONNECTED) {
     //rtc.adjust(DateTime(2023, 6, 18, 13, 59, 0));
    rtc.adjust(DateTime(2023, 6, 18, (timeClient.getHours()), (timeClient.getMinutes()), (timeClient.getSeconds())));
  }

  delay(1000);
  display.clearDisplay();

  display.clearDisplay();
  u8g2_for_adafruit_gfx.setFontMode(1);
  u8g2_for_adafruit_gfx.setFontDirection(0);
  u8g2_for_adafruit_gfx.setForegroundColor(WHITE);
  u8g2_for_adafruit_gfx.setCursor(7,35);
  u8g2_for_adafruit_gfx.setFont(u8g2_font_lubI18_tf);
  u8g2_for_adafruit_gfx.print("Bismillah");
  display.display();
  delay(3000);
  display.clearDisplay();
}

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

  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();
  //Serial.println(now.day(), DEC);
  //Serial.println(String("DateTime::TIMESTAMP_DATE:\t")+now.timestamp(DateTime::TIMESTAMP_DATE));

  
  display.clearDisplay();
  u8g2_for_adafruit_gfx.setFontMode(1);
  u8g2_for_adafruit_gfx.setFontDirection(0);
  u8g2_for_adafruit_gfx.setForegroundColor(WHITE);
  u8g2_for_adafruit_gfx.setCursor(1,29);
  u8g2_for_adafruit_gfx.setFont(u8g2_font_logisoso26_tn);

  if (now.hour() < 10) u8g2_for_adafruit_gfx.print('0');
  u8g2_for_adafruit_gfx.print(now.hour(), DEC);
  u8g2_for_adafruit_gfx.print(':');

  if(now.minute() < 10) u8g2_for_adafruit_gfx.print('0');
  u8g2_for_adafruit_gfx.print(now.minute(), DEC);
  u8g2_for_adafruit_gfx.print(':');

  if(now.second() < 10) u8g2_for_adafruit_gfx.print('0');
  u8g2_for_adafruit_gfx.println(now.second(), DEC);

  u8g2_for_adafruit_gfx.setCursor(1,45);
  u8g2_for_adafruit_gfx.setFont(u8g2_font_ncenB10_tf);
  u8g2_for_adafruit_gfx.println(days[now.dayOfTheWeek()]);
  //u8g2_for_adafruit_gfx.print(" ");
  u8g2_for_adafruit_gfx.setCursor(1,60);
  u8g2_for_adafruit_gfx.setFont(u8g2_font_ncenB10_tf);
  if(now.day() < 10) u8g2_for_adafruit_gfx.print('0');
  u8g2_for_adafruit_gfx.print(now.day());
  u8g2_for_adafruit_gfx.print("  ");
  if(now.month() < 10) u8g2_for_adafruit_gfx.print('0');
  u8g2_for_adafruit_gfx.print(now.month());
  u8g2_for_adafruit_gfx.print("  ");
  u8g2_for_adafruit_gfx.print(now.year());
  
  display.display();

  delay(1000);
}