#include <Wire.h>
#include <DS3231.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SH110X.h>

#define i2c_Address 0x3c
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1

Adafruit_SH1106G oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
DS3231 myRTC;

#define SW1_PIN 7
#define SW2_PIN 8
#define SW3_PIN 9
#define SW4_PIN 10
#define SW5_PIN 11

char dataHari[7][12] = { "Minggu", "Senin", "Selasa", "Rabu", "Kamis", "Jumat", "Sabtu" };
char DayData[7][12] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };
char dataBulan[12][5] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
String hari, bulan, day;

bool century = false;
bool mode12 = false;
bool h12;
bool hPM;
byte theSecond, theMinute, theHour, theDoW, theDate, theMonth, theYear;


void setup() {
  Serial.begin(9600);
  oled.begin(i2c_Address, true);

  pinMode(SW1_PIN, INPUT_PULLUP);
  pinMode(SW2_PIN, INPUT_PULLUP);
  pinMode(SW3_PIN, INPUT_PULLUP);
  pinMode(SW4_PIN, INPUT_PULLUP);
  pinMode(SW5_PIN, INPUT_PULLUP);

  // setMyRTC(0, 13, 4, 59, 3, 6, 8, 24);
}

char timeString[9];
char dateString[12];

void loop() {
  readMyRTC(0, 1, &theHour, &theMinute, &theSecond, &theDoW, &theDate, &theMonth, &theYear);
  // hari = dataHari[theDoW - 1];
  sprintf_P(timeString, PSTR("%2d:%02d:%02d"), theHour, theMinute, theSecond);
  sprintf_P(dateString, PSTR(", %02d-%02d-%02d"), theDate, theMonth, theYear);
  day = DayOfTheWeek(theDoW);

  show(2, 15, 10, timeString);
  show(1, 15, 30, day + dateString);
  // show(1, (oled.width() - day.length())/3, 38, day);
  
  oled.display();
  oled.clearDisplay();
  // Serial.println((oled.width() - day.length())/2);
}

void show(uint8_t textSize, uint8_t x, uint8_t y, String s) {
  oled.setTextSize(textSize);
  oled.setTextColor(SH110X_WHITE);
  oled.setCursor(x, y);
  oled.print(s);
}

String DayOfTheWeek(uint8_t theDoW) {
  String DayText;
  for(int i = 0; i < 7; i++){
    if (theDoW - 1 == i) DayText = DayData[i];
  }
  return DayText;
}

String AddLeadingZero(uint8_t x) {
  String AddLeadingZeroText;
  if (x < 10) AddLeadingZeroText = "0";
  else AddLeadingZeroText = "";
  AddLeadingZeroText = AddLeadingZeroText + x;
  return AddLeadingZeroText;
}

String CurrentTime(uint8_t theHour, uint8_t theMinute, uint8_t theSecond) {
  String CurrentTimeText = "";
  CurrentTimeText = CurrentTimeText + AddLeadingZero(theHour) + ":" + AddLeadingZero(theMinute) + ":" + AddLeadingZero(theSecond);
  return CurrentTimeText;
}

String CurrentDate(uint8_t theDate, uint8_t theMonth, uint8_t theYear) {
  String CurrentDateText = "";
  CurrentDateText = CurrentDateText + AddLeadingZero(theDate) + "-" + AddLeadingZero(theMonth) + "-" + theYear;
  return CurrentDateText;
}

void setMyRTC(bool mode12, byte theHour, byte theMinute, byte theSecond, byte theDoW, byte theDate, byte theMonth, byte theYear) {
  myRTC.setClockMode(mode12);
  myRTC.setHour(theHour);
  myRTC.setMinute(theMinute);
  myRTC.setSecond(theSecond);
  myRTC.setDoW(theDoW);
  myRTC.setDate(theDate);
  myRTC.setMonth(theMonth);
  myRTC.setYear(theYear);
}

void readMyRTC(bool h12, bool hPM, byte *theHour, byte *theMinute, byte *theSecond, byte *theDoW, byte *theDate, byte *theMonth, byte *theYear) {
  *theHour = myRTC.getHour(h12, hPM);
  *theMinute = myRTC.getMinute();
  *theSecond = myRTC.getSecond();
  *theDoW = myRTC.getDoW();
  *theDate = myRTC.getDate();
  *theMonth = myRTC.getMonth(century);
  *theYear = myRTC.getYear();
}