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

RTC_DS1307 rtc;

#define SCREEN_WIDTH 128  // OLED display width, in pixels
#define SCREEN_HEIGHT 64  // OLED display height, in pixels
#define OLED_RESET    -1  // Reset pin # (or -1 if sharing reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

void setup(){
  Serial.begin(57600);
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { 
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  if (! rtc.isrunning()) {
    Serial.println("RTC is NOT running, let's set the time!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
    // rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
  }
  
  display.display();
  delay(2);
  display.clearDisplay();
  display.setTextColor(WHITE);
  display.setTextSize(2);
  display.setCursor(0,5);
  display.print("  Clock ");
  display.display();

}

void loop() {
 DateTime time = rtc.now();
 //Serial.println(String("DateTime:: ")+time.timestamp(DateTime::TIMESTAMP_DATE));
 //Serial.println(String("DateTime:: ")+time.timestamp(DateTime::TIMESTAMP_TIME));

 display.clearDisplay();

 display.setTextSize(2);
 display.setCursor(0,0);
 
 display.print(String(time.hour())+":"+String(time.minute())+":"+String(time.second()));

 display.setTextSize(2);
 display.setCursor(0,20);
 display.print(String(time.year())+":"+String(time.month())+":"+String(time.day()));
 
 display.setTextSize(2);
 display.setCursor(0,40);
 display.print(daysOfTheWeek[time.dayOfTheWeek()]);

 display.display();
}