#include <LiquidCrystal_I2C.h>
#include <TinyWireM.h>
#include <TinyRTClib.h>
int alm1, alhr=0;
int ho,ur,mi,te,se, conds, seconds, minutes, hours;
int da, ys, mon, ths, yea, rs, days, months, years, day_of_week;
int totalColumns = 16;
int totalRows = 2;
int counter0, counter, counter2, counter3, counter4, counter5, counter6, counter7, counter8 =0;
int al_on_off=0;
int num1, press=0;
LiquidCrystal_I2C lcd(0x27, totalColumns, totalRows);
#define DS1307_ADDR 0x68
RTC_DS1307 rtc;
void setup(){
pinMode(1, OUTPUT);
digitalWrite(1, LOW);
pinMode(4, INPUT);
pinMode(3, INPUT);


lcd.init(); 
lcd.backlight(); // use to turn on and turn off LCD back light
 // Setup TinyWire I2C
  TinyWireM.begin();
  rtc.begin();
//rtc.adjust(DateTime(2014, 5, 4, 3, 0, 0));

}

void updateClock()
{
  TinyWireM.beginTransmission(DS1307_ADDR); // Reset DS1307 register pointer
  TinyWireM.send(0x00);
  TinyWireM.endTransmission();

  // Request 7 bytes from DS1307
  TinyWireM.requestFrom(DS1307_ADDR, 7);

  seconds = bcdToDec(TinyWireM.receive());
  minutes = bcdToDec(TinyWireM.receive());
  hours = bcdToDec(TinyWireM.receive());
  day_of_week = TinyWireM.receive();    
  days = bcdToDec(TinyWireM.receive());          
  months = bcdToDec(TinyWireM.receive());      
  years = bcdToDec(TinyWireM.receive()); 
  ho = hours / 10;
  ur = hours % 10;
  mi = minutes / 10;
  te = minutes % 10;
  se= seconds/10;
  conds= seconds%10;
  da = days / 10;
  ys = days % 10;
  mon= months/10;
  ths=months%10;
  yea=years/10;
  rs=years%10;
}

// Convert binary coded decimal to normal decimal numbers
uint8_t bcdToDec(uint8_t value) {
  return ((value / 16 * 10) + (value % 16));
}
void display()
{
counter0=1;
counter=0;
counter2=0;
counter3=0;
 counter4=0;
 counter5=0;
 counter6=0;
  


updateClock();



lcd.setCursor(6,0);
lcd.print(String(ho)+ String(ur)+":"+ String(mi) + String(te)+":"+ String(se)+ String(conds)+ " ");


//lcd.setCursor(6,1);
//lcd.print(String(da)+ String(ys)+ "/" + String(mon) + String(ths)+ "/" + String(yea)+ String(rs));

//delay(900);
//lcd.clear(); 
}




void loop()
{
  
if(hours==alhr && minutes==alm1 && al_on_off==1)
{
digitalWrite(1, HIGH);
delay(100);
digitalWrite(1, LOW);
delay(100);

}else{
  digitalWrite(1, LOW);
}


if (digitalRead(3)==1) 
{
if(press==0)
{
num1++;
press=1;
delay(200);
//lcd.clear();
}
}
else
{
press=0;
}
if(num1==5 && al_on_off==0)
{
  num1=0;
}

if(num1==7)
{
  num1=0;
}

switch (num1)
{
  case 0:
  if(counter0<1){
    lcd.clear();
  }
  
  display();
  
  break;
  case 1:
  if(counter<1){
  
  lcd.clear();
  };

  sHour();
  break;
  case 2:
  if(counter2<1){
  
  lcd.clear();
  } 
  sMinute();
  break;
  case 3:
  if(counter3<1){
  
  lcd.clear();
  } 

  sSec();
  break;
  
  case 4:

  if(counter4<1){
  
  lcd.clear();
  }
  Alrm();
  break;
  case 5:
  SetAlrhr();
  break;
  case 6:
  if(counter6<0)
  {
    lcd.clear();
  }
  SetAlrmi();
  break;
}


}




//Set hours 
void sHour(){
counter =1;

if(digitalRead(4)==1)
{
  hours++;
  delay(200);
  
}
if(hours>23)
{
  hours=0;
}

lcd.setCursor(0,0);
lcd.print("Set hours " + String(hours/10)+ String(hours%10));


}

//Set minutes
void sMinute(){
counter2=1;
if(digitalRead(4)==1)
{
  minutes++;
  delay(200);
  rtc.adjust(DateTime(years, months, days, hours , minutes , seconds));
}

if(minutes>59)
{
  minutes=0;
}
lcd.setCursor(0,0);
lcd.print("Set minutes " + String(minutes/10)+String(minutes%10));



}

//Set seconds
void sSec(){
  counter3 =1;
if(digitalRead(4)==1)
{
  seconds++;
  delay(200);
  rtc.adjust(DateTime(years, months, days, hours , minutes, seconds));
}
if(seconds>59)
{
  seconds=0;
}
lcd.setCursor(0,0);
lcd.print("Set seconds " + String(seconds/10)+String(seconds%10));


}


void Alrm()
{  
 
  counter4 =1;
  if(digitalRead(4)==1)
  {
  al_on_off++;
  delay(200);
  }
  if(al_on_off==2)
  {
    al_on_off=0;
  }


lcd.setCursor(6,0);
lcd.print("Alarm");
lcd.setCursor(12,0);
if(al_on_off==0){
lcd.print("Off");
}else if(al_on_off==1){
lcd.print("On ");

}
}


void SetAlrhr()

{
 
if(al_on_off==1)
{

if(digitalRead(4)==1)
{
 alhr++;
 delay(200); 
 
}
if(alhr>23)
{
  alhr=0;
}

lcd.setCursor(0,0);
lcd.print("Set alarm hours ");
lcd.setCursor(6,1);
lcd.print (String(alhr/10)+ String(alhr%10));




}
}


void SetAlrmi()

{
  counter0=0;
counter6 =1;
if(digitalRead(4)==1)
{
  alm1++;
  delay(200);
  
  
  
}

if(alm1>59)
{
  alm1=0;
}

lcd.setCursor(0,0);
lcd.print("Set alarm minutes ");
lcd.setCursor(6,1);
lcd.print(String(alm1/10)+String(alm1%10));


}