// Learn about the ESP32 WiFi simulation in
// https://docs.wokwi.com/guides/esp32-wifi

#include <Wire.h>
#include <WiFi.h>
#include <LiquidCrystal_I2C.h>
#include <time.h>
#include <RTClib.h>

RTC_DS1307 rtc;
LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 20, 4);

#define NTP_SERVER     "pool.ntp.org"
#define UTC_OFFSET     3600 * 8
#define UTC_OFFSET_DST 0

#define MY_TZ "WIB-8"

#define WIFI_SSID     "Wokwi-GUEST"
#define WIFI_PASSWD   ""

void spinner() {
  static int8_t counter = 0;
  const char* glyphs = "\xa1\xa5\xdb";
  LCD.setCursor(15, 1);
  LCD.print(glyphs[counter++]);
  if (counter == strlen(glyphs)) {
    counter = 0;
  }
}

void printLocalTime() {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    LCD.setCursor(0, 1);
    LCD.println("Connection Err");
    return;
  }

  LCD.setCursor(8, 0);
  LCD.println(&timeinfo, "%H:%M:%S");
  // LCD.println(&timeinfo);

  LCD.setCursor(0, 1);
  LCD.println(&timeinfo, "%d/%m/%Y   %Z");
}

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

  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Connecting to ");
  LCD.setCursor(0, 1);
  LCD.print("WiFi ");

  WiFi.begin(WIFI_SSID, WIFI_PASSWD, 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    spinner();
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  LCD.clear();
  LCD.setCursor(0, 0);
  LCD.println("Online");
  LCD.setCursor(0, 1);
  LCD.println("Updating time...");

  configTime(UTC_OFFSET, UTC_OFFSET_DST, NTP_SERVER);

  //UNTUK RTC
  if (! rtc.begin()) {
    Serial.println("Tidak dapat menemukan modul RTC");
    Serial.flush();
    while (1) delay(10);
  } else if (WiFi.status() == WL_CONNECTED) {

    struct tm infoWaktu;
    if (!getLocalTime(&infoWaktu)) {
      Serial.println("Failed to obtain time");
      return;
    }

    //Penyesuaian Waktu RTC
    // January 21, 2014 at 13:25:10 you would call:
    // rtc.adjust(DateTime(2025, 1, 21, 3, 25, 10));
    // Member    Type  Meaning Range
    // tm_sec    int   seconds after the minute  0-61*
    // tm_min    int   minutes after the hour    0-59
    // tm_hour   int   hours since midnight      0-23
    // tm_mday   int   day of the month          1-31
    // tm_mon    int   months since January     0-11
    // tm_year   int   years since 1900
    // tm_wday   int   days since Sunday         0-6
    // tm_yday   int   days since January 1      0-365
    // tm_isdst  int   Daylight Saving Time flag

    // rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
    // DateTime newDT = DateTime(infoWaktu.tm_year, (infoWaktu.tm_mon + 1), infoWaktu.tm_mday, infoWaktu.tm_hour, infoWaktu.tm_min, infoWaktu.tm_sec);
    rtc.adjust(DateTime((infoWaktu.tm_year - 100), (infoWaktu.tm_mon + 1), infoWaktu.tm_mday, infoWaktu.tm_hour, infoWaktu.tm_min, infoWaktu.tm_sec));

    // Tutorial Variabel Waktu
    // https://raw.githubusercontent.com/RuiSantosdotme/Random-Nerd-Tutorials/master/Projects/ESP32/ESP32_Date_Time.ino
    // https://randomnerdtutorials.com/esp32-date-time-ntp-client-server-arduino/
    LCD.setCursor(0, 3);
    LCD.print("Time variables ");
    char timeHour[3];
    strftime(timeHour, 3, "%H", &infoWaktu);
    LCD.print(timeHour);

    // char timeWeekDay[10];
    // strftime(timeWeekDay, 10, "%A", &infoWaktu);
    // LCD.print(timeWeekDay);
  }
  //==== SAMPAI DISINI RTC

  // LCD.clear();
}

void loop() {
  printLocalTime();
  delay(250);
  DateTime now = rtc.now();

  Serial.print("Current time: ");
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day());
  Serial.print(" (");
  Serial.print(now.dayOfTheWeek(), DEC);
  Serial.print(") ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  // Serial.print("\t");
  // Serial.print(timeHour);
  // Serial.print("\t");
  // Serial.print("Hour (12 hour format): ");
  // Serial.print(&infoWaktu, "%I");
  // Serial.print("\t");
  // Serial.print("Test Jam Lagi: ");
  // Serial.print(infoWaktu.tm_hour);
  // Serial.print(DateTime.Minute);
  // Serial.print(':');
  // Serial.print(DateTime.Second);
  // Serial.print(timeinfo);
  Serial.println();

  Serial.println();
}