#include <SPI.h>           
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET 4
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#include "RTClib.h"
RTC_DS1307 rtc;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

int pot;
int set_hour;
int set_minute;
int set_second;
int mode = 0;

void setup()   {
  Serial.begin(115200);
  pinMode(A1, INPUT);
  pinMode(2, INPUT_PULLUP);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setTextSize(1);          
  display.setTextColor(WHITE);

  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }  

  
}


void loop() {

  DateTime now = rtc.now();
  rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
  pot = (analogRead(A1));
  set_hour = now.hour();
  set_minute = now.minute();
  set_second = now.second();

  display.fillRect(0,0,128,128,BLACK);

  if((digitalRead(2) == LOW) && (mode <= 2)){
    mode++;
    delay(100);
  }

  if((digitalRead(2) == LOW) && (mode >= 3)){
    mode = 0;
    delay(100);
  }

  if(mode == 1){

    set_hour = pot/42;
    display.drawFastHLine(0,23,5,WHITE);
  }

  if(mode == 2){

    set_minute = pot/17;
    display.drawFastHLine(15,23,5,WHITE);
  }

  rtc.adjust(DateTime(2024,3,21,set_hour,set_minute,set_second));
  display.setCursor(0,0);
  display.setTextSize(1);          
  display.setTextColor(WHITE);
  
  display.print("Current time: ");
  display.setCursor(0,13);
  display.print(now.hour(), DEC);
  display.print(':');
  display.print(now.minute(),DEC);
  display.print(':');
  display.print(now.second(),DEC);

  //display.setCursor(0,26);
  //display.print(pot);
  display.display();


}