#include <SPI.h>              //Library SPI
#include <Wire.h>             //Library Wire
#include <Adafruit_GFX.h>     //Library GFX
#include <Adafruit_SSD1306.h> //Library OLED SSD1306

#include "RTClib.h"

#define UP_BUTTON 2
#define DOWN_BUTTON 3
#define OK_BUTTON 3
#define MENU_BUTTON 4
bool menu = false;

int cursor = 0;

RTC_DS1307 rtc;

char namaHari[7][12] = {"Minggu", "Senin", "Selasa", "Rabu", "Kamis", "Jumat", "Sabtu"};
// String formatNumber[60]={"00","01","02","03","04","05","06","07","08","09","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30","31","32","33","34","35","36","37","38","39","40","41","42","43","44","45","46","47","48","49","50","51","52","53","54","55","56","57","58","59" };

 
#define SCREEN_WIDTH 128 //Panjang LCD OLED
#define SCREEN_HEIGHT 64 //Tinggi LCD OLED
 
#define OLED_RESET -1    //Pin reset terhubung dengan arduino
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
 
void setup() {
  Serial.begin(9600);

  pinMode(UP_BUTTON, INPUT_PULLUP);
  pinMode(DOWN_BUTTON, INPUT_PULLUP);
  pinMode(OK_BUTTON, INPUT_PULLUP);
  pinMode(MENU_BUTTON, INPUT_PULLUP);

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { //Alamat OLED
  Serial.println(F("SSD1306 allocation failed"));
  for(;;); // Don't proceed, loop forever
  }

  if (! rtc.begin()) {
    Serial.println("RTC TIDAK TERBACA");
    while (1);
  }

  if (! rtc.isrunning()) {
    Serial.println("RTC is NOT running!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));//update rtc dari waktu komputer
  }


}

void menuList() {
   display.clearDisplay();
      display.setTextSize(2);
      display.setCursor(0, 0);
      display.print("Menu-mode");
      // ================================================================================
      display.setTextSize(1);
      display.setTextColor(WHITE);      //Instruksi untuk mengatur warna
      display.setCursor(0, 16);
      display.print("  Menu 1");
      display.setCursor(0, 24);
      display.print("  Menu 2");
      display.setCursor(0, 32);
      display.print("  Menu 3");
      display.setCursor(0, 40);
      display.print("  Menu 4");
      display.setCursor(0, 48);
      display.print("  Menu 5");
      display.setCursor(0, 56);
      display.print("  Menu 6");
      display.display();
}

void cursorList() {
  //  display.clearDisplay();
      // ================================================================================
      display.setTextSize(1);

      display.setTextColor(WHITE); 
      if (cursor == 0) {
        display.setCursor(0, 16);
        display.print(">");
      } else  if (cursor == 1) {
        display.setCursor(0, 24);
        display.print(">");
      } else  if (cursor == 2) {
        display.setCursor(0, 32);
        display.print(">");
      } else  if (cursor == 3) {
        display.setCursor(0, 40);
        display.print(">");
      } else  if (cursor == 4) {
        display.setCursor(0, 48);
        display.print(">");
      } else  if (cursor == 5) {
        display.setCursor(0, 56);
        display.print(">");
      }
      display.display();
}

void myButton() {
  if (digitalRead(MENU_BUTTON) == LOW && menu == false) {
    menu = true;
  } else  if (digitalRead(MENU_BUTTON) == LOW && menu == true) {
    menu = false;
  }

  if (digitalRead(UP_BUTTON) == LOW && menu == true) {
    if (cursor != 5) {
      cursor ++;
    } else {
      cursor = 0;
    }
  }

  if (digitalRead(DOWN_BUTTON) == LOW && menu == true) {
    if (cursor != 0) {
      cursor --;
    } else {
      cursor = 5;
    }
  }
}

void myShow() {
 if (menu == false) {
    DateTime now = rtc.now();

      display.clearDisplay();
      display.setTextSize(1);
      display.setCursor(0, 0);
      display.print("Muwatok-Dev");
      // ================================================================================

      display.setTextSize(2);
      display.setTextColor(WHITE);
      display.setCursor(0, 12);
      // display.print("00:00:00");
      display.print(now.hour(), DEC);
      display.print(":");
      display.print(now.minute(), DEC);
      display.print(":");
      display.println(now.second(), DEC);
      // ================================================================================

      display.setTextSize(1);
      display.setCursor(0, 30);
      display.print(namaHari[now.dayOfTheWeek()]);  
      display.print(", ");  
      display.print(now.day());
      display.print("-"); 
      display.print(now.month());
      display.print("-"); 
      display.print(now.year());

      display.display();
  } else {
    menuList();
    cursorList();
  }
}
 
void loop() {
  myButton();
  myShow();

  // Serial.println(cursor);

  delay(100);

}