#include <RTClib.h>
#include<ezButton.h>

RTC_DS1307 rtc;



//  encoder variables
byte clk = 2;
byte dt = 3;
byte sw = 4;

ezButton button(sw);

//  counting rotations
int counter = 0;
int prev_counter = 0;
int flag = 0;



void setup(){
   Serial.begin(9600);
   attachInterrupt(digitalPinToInterrupt(clk),encoder,FALLING);
   button.setDebounceTime(25);
  /*f(!rtc.begin()){
     Serial.println("RTC not initialised");
     while(true);
   }
   Serial.println("RTC found");  */

}
void encoder(){
  prev_counter=counter;
  if(digitalRead(dt)==HIGH)counter++ ; 
  else counter--;
  counter=constrain(counter,0,3);
  flag=1;
}
void mode_selector(){
  if(prev_counter !=counter && flag==1){
    if(counter==0) Serial.println("Date and time");
    else if(counter==1) Serial.println("Set alarm");
    else if(counter==2) Serial.println("Stopwatch");
    else Serial.println("Countdown Timer");
    flag=0;
   
  }

}

void loop(){
  button.loop();
  if(button.isPressed())select_mode();
  mode_selector();
  delay(10);
 /* DateTime dt=rtc.now();
  rtc_date=get_date(dt);
  Serial.println(rtc_date);
  rtc_time=get_time(dt);
  Serial.println(rtc_time);
  delay(1000);*/
}

String get_time(DateTime current){
  int hour=current.hour();
  int minute=current.minute();
  int second=current.second();

  String current_time="Time:" +String(hour)+":"+String(minute)+":"+String(second);
  return current_time;
}

/*String get_date(DateTime current){
  int year=current.year();
  int month=current.month();
  int day=current.day();

  String current_date="Date:" +String(day)+"/"+String(month)+"/"+String(year);
  return current_date;

}*/
void select_mode(){
  if(counter=0)Serial.println("Date and time mode is selected");
   if(counter=1)Serial.println("Set alarm mode is selected");
    if(counter=2)Serial.println("Stopwatch mode is selected");
     if(counter=3)Serial.println("Countdown mode is selected");
}