#ifdef ESP32
  #include <WiFi.h>
#else
  #include <ESP8266WiFi.h>
#endif
#include <time.h>
//#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <NTPClient.h>
#include <U8g2_for_Adafruit_GFX.h>
//#include <Fonts/FreeSansBold18pt7b.h>

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

//byte panjang, lebar;
//int16_t  x, y;
//uint16_t w, h;

const char* ssid     = "Wokwi-GUEST";
const char* password = "";

const char *ntpServer = "pool.ntp.org"; // Server NTP untuk WIB (Waktu Indonesia Barat)
const long gmtOffset_sec = 7 * 3600; // WIB (UTC + 7 hours)
const int daylightOffset_sec = 0;

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);
  display.clearDisplay();
  //u8g2_for_adafruit_gfx.setTextSize(1); 
  //u8g2_for_adafruit_gfx.setCursor(1,10);
  u8g2_for_adafruit_gfx.setForegroundColor(WHITE); 

  // Connect to Wi-Fi
  Serial.print("Connecting to ");
  Serial.println(ssid);
  u8g2_for_adafruit_gfx.setFontMode(1);
  u8g2_for_adafruit_gfx.setFontDirection(0);
  u8g2_for_adafruit_gfx.setForegroundColor(WHITE);
  u8g2_for_adafruit_gfx.setFont(u8g2_font_tinytim_tf);
  u8g2_for_adafruit_gfx.setCursor(1,20);
  u8g2_for_adafruit_gfx.println("Connecting to");
  display.display();
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    //u8g2_for_adafruit_gfx.setCursor(1,20)
    //u8g2_for_adafruit_gfx.print(".");
    //display.display();
  }
  Serial.println("");
  Serial.println("WiFi connected.");
  display.println("");

  // Init and get the time
  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
  printLocalTime();

  //disconnect WiFi as it's no longer needed
  WiFi.disconnect(true);
  WiFi.mode(WIFI_OFF);
}

void loop(){
  delay(1000);
  printLocalTime();
}

void printLocalTime(){

  struct tm timeinfo;
  if(!getLocalTime(&timeinfo)){
    Serial.println("Failed to obtain time");
    return;
  }
  Serial.println(&timeinfo, "%A, %B %d %Y %H:%M:%S");
  
  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(1,30);
  u8g2_for_adafruit_gfx.setFont(u8g2_font_timB24_tn);
  u8g2_for_adafruit_gfx.print(&timeinfo, "%H:%M:%S");
  u8g2_for_adafruit_gfx.setCursor(1,50);
  u8g2_for_adafruit_gfx.setFont(u8g2_font_tinytim_tf);
  u8g2_for_adafruit_gfx.print(&timeinfo, "%A, %d %B %Y");

  display.display();

}