#include <TM1637.h>
#include <RTClib.h>
#include <Button.h>

RTC_DS1307 rtc;
int CLK = 2;
int DIO = 3;
TM1637 tm(CLK, DIO);
Button hourButton(A0);
Button minuteButton(A1);
Button modeButton(A2);

int mode = 0;
int adjustHour = 7;
int adjustMinute = 0;

void setup() {
  Serial.begin(9600);
  tm.init();
  tm.set(3);
  if (!rtc.begin())
  {
    Serial.print("Khong the tim thay rtc");
    while (1);
  }
   if (!rtc.isrunning())
  {
    Serial.print("RTC ko hoat dong");
  }
  rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
}

void loop() {
  Mode();
  if (mode == 0){
    DisplayTime();
    AdjustTime();
  }
  else if (mode == 1){
    DisplayDayMonth();
  }
  else if (mode == 2){
    DisplayYear();
  }
}

void Mode(){
   if (modeButton.released()){
     mode ++;
   }
   if (mode > 2){
     mode -= 3;
   }
}

void DisplayTime(){
  DateTime now = rtc.now();

  int h = (now.hour()+adjustHour)%24;
  int m = (now.minute()+adjustMinute)%60;
  int h0 = int (h/10);
  int h1 = h%10;
  int m0 = int (m/10);
  int m1 = m%10;
  tm.display(0,h0);
  tm.display(1,h1);
  if (now.second()%2 == 0){
    tm.point(0);
  }
  if (now.second()%2 == 1){
    tm.point(1);
  }
  tm.display(2,m0);
  tm.display(3,m1);
}

void AdjustTime(){
  if (hourButton.released()){
     adjustHour ++;
  }
  if (minuteButton.released()){
    adjustMinute ++;
  }
  adjustHour %=24;
  adjustMinute %=60;
}

void DisplayDayMonth(){
  DateTime now = rtc.now();
  int d = now.day();
  int M = now.month();
  int d0 = int (d/10);
  int d1 = d%10;
  int M0 = int (M/10);
  int M1 = M%10;
  tm.display(0,d0);
  tm.display(1,d1);
  tm.point(1);
  tm.display(2,M0);
  tm.display(3,M1);
}

void DisplayYear(){
  DateTime now = rtc.now();
  int y = now.year();
  int y0 = int (y/1000);
  int y1 = int ((y-y0*1000)/100);
  int y2 = int ((y-y0*1000-y1*100)/10);
  int y3 = y-y0*1000-y1*100-y2*10;
  tm.display(0,y0);
  tm.display(1,y1);
  tm.point(0);
  tm.display(2,y2);
  tm.display(3,y3);
}