/*-------------------------------------------
 * Countdown with SSD1306
 * Credits: Diogo Vilhena
 * https://github.com/VilhenaChen
 *-------------------------------------------
 */
 
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "uRTCLib.h"

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

//Variables declaration Hour(hora) Minute(minu) Second(sec)
int hora = 53;
int minu = 57;
int sec = 60;

uRTCLib rtc(0x68);

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

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

int encoderPinA = 5; // CLK pin
int encoderPinB = 6; // DT pin
int encoderBtn = 7; // SW pin
int count = 0;
int encoderPinA_prev;
int encoderPinA_value;
boolean bool_CW;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  URTCLIB_WIRE.begin();
  rtc.set(0, 0, 0, 0, 1, 1, 01);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // Address 0x3C for 128x64
  display.fillScreen(0);
  display.display();
  pinMode (encoderPinA, INPUT);
  pinMode (encoderPinB, INPUT);
  pinMode(encoderBtn, INPUT_PULLUP);
  encoderPinA_prev = digitalRead(encoderPinA);
}

void loop() {
  rtc.refresh();
encoderPinA_value = digitalRead(encoderPinA);
if (encoderPinA_value != encoderPinA_prev) { // check if knob is rotating
// if pin A state changed before pin B, rotation is clockwise
if (digitalRead(encoderPinB) != encoderPinA_value) {
count ++;
bool_CW = true;
} else {
// if pin B state changed before pin A, rotation is counter-clockwise
bool_CW = false;
count--;
}
if (bool_CW) {
Serial.print("Clockwise | ");
} else {
Serial.print("Counter-Clockwise | ");
}
Serial.print(count);
Serial.print(" | ");
}
encoderPinA_prev = encoderPinA_value;
// check if button is pressed (pin SW)
// if (digitalRead(encoderBtn) == LOW) Serial.println("Button Pressed");
// else Serial.println("Button Released");

  // Serial.print("Current Date & Time: ");
  // Serial.print(rtc.year());
  // Serial.print('/');
  // Serial.print(rtc.month());
  // Serial.print('/');
  // Serial.print(rtc.day());

  // Serial.print(" (");
  // Serial.print(daysOfTheWeek[rtc.dayOfWeek()-1]);
  //  Serial.print(") ");

  // Serial.print(rtc.hour());
  // Serial.print(':');
  // Serial.print(rtc.minute());
  // Serial.print(':');
  // Serial.println(rtc.second());
  //   display.clearDisplay(); //Used to clear the display
  //   //Text stuff, Size and Color
  //   display.setTextSize(2);
  //   display.setTextColor(WHITE);
  //   display.setCursor(13,0); //setCursor(x,y) //Change to your needs
  //   display.print("Countdown");
  //   display.setCursor(25,15);
  //   display.setCursor(13,40);
  //   display.setTextSize(2);
  //   //This if(variable < 10) ensures that if the number is below 2 digits, it will remain centered otherwise justs prints the variable
  //   if( hora < 10) {
  //     display.print("0");
  //     display.setCursor(25,40);
  //     display.print(hora);
  //   }
  //   else {
  //     display.print(hora);
  //   }
  //   display.setCursor(34,40);
  //   display.print(":");
  //   display.setCursor(41,40);
  //   if( minu < 10) {
  //     display.print("0");
  //     display.setCursor(53,40);
  //     display.print(minu);
  //   }
  //   else {
  //     display.print(minu);
  //   }
  //   display.setCursor(62,40);
  //   display.print(":");
  //   display.setCursor(70,40);
  //   display.print(sec);
  //   //Delay for 1s = 1000ms
  //   delay(1000);
  //   //The maths behinf this, if sec==0 then minu=minu-1 and if minu==0 then hora=hora-1, just the basics of a clock
  //   sec = sec - 1;
  //   if(sec == 0) {
  //     sec = 60;
  //     minu = minu - 1;
  //   }
  //   if (minu < 0) {
  //     minu = 60;
  //     hora = hora - 1;
  //   }
  //   display.display(); //Display the corrent countdown
}