#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

int starttime;
int activetime;
int prevoustime = 0;

int hours = 0;
int mins = 0;

int ahours = 0;
int amins = 0;

bool buttonState = false;
bool *buttonStatePtr;
bool buttonState2 = false;
bool *buttonState2Ptr;

void setup()
{
  lcd.begin(16, 2);
  lcd.clear();
  
  Serial.begin(9600);
  
  pinMode(13, INPUT);
  digitalWrite(13, HIGH);
  pinMode(11, INPUT);
  digitalWrite(11, HIGH);
  pinMode(10, INPUT);
  digitalWrite(10, HIGH);
  pinMode(8, INPUT);
  digitalWrite(8, HIGH);

  pinMode(7, INPUT);
  digitalWrite(7, HIGH);

  //pinMode(A0, OUTPUT);
  //digitalWrite(A0, HIGH);
  
  pinMode(9, OUTPUT);

   buttonStatePtr = &buttonState;
   buttonState2Ptr = &buttonState2;
  
  starttime = millis()/1000;
}

void loop()
{
  if(digitalRead(8) == LOW)
  {
     *buttonState2Ptr = true;
  }

  if(*buttonState2Ptr) {
    lcd.setCursor(6,1);
    lcd.print("Alarm");
    lcd.setCursor(6,0);
       if(digitalRead(11) == LOW)
    {
     amins++;
    } 
    else if (digitalRead(10) == LOW)
    {
      ahours++;
    }
    // lcd.setCursor(6,0);
  
  
  if(ahours < 10)
  {
    lcd.print("0");
    lcd.print(ahours);
  }
  else
  {
    lcd.print(ahours);
  }
    
    lcd.print(":");
    
  if (amins < 10)
  {
    lcd.print("0");
      lcd.print(amins);
  }
  else
  {
      lcd.print(amins);
  }
  if(amins > 59)
     {
      ahours++;
      amins = 0;
     } 
  if(ahours > 23)
     {
      ahours = 0; 
     }
     delay(500);
    // lcd.clear();
  }

  
  if(digitalRead(13) == LOW)
  {
    *buttonStatePtr = true;
  }

  if(*buttonStatePtr) {
    lcd.setCursor(5,1);
    lcd.print("Set Time");
    lcd.setCursor(6,0);
     if(digitalRead(11) == LOW)
    {
     mins++;
    } 
    else if (digitalRead(10) == LOW)
    {
      hours++;
    }
  }

  if(digitalRead(7) == LOW)
  {
    *buttonStatePtr = false;
    *buttonState2Ptr = false;
   // lcd.clear();
  }

  

  
      activetime = (millis() / 1000) - starttime;
      if(prevoustime < (activetime - 59))
      {
       mins++;
       prevoustime = activetime;
      } 
      
      if(mins > 59)
     {
      hours++;
      mins = 0;
     } 
     
     if(hours > 23)
     {
      hours = 0; 
     }
  
  
  lcd.setCursor(6,0);
  
  if(*buttonStatePtr == false && *buttonState2Ptr == false) {
    if(hours < 10)
  {
    lcd.print("0");
    lcd.print(hours);
  }
  else
  {
    lcd.print(hours);
  }
    
    lcd.print(":");
    
  if (mins < 10)
  {
    lcd.print("0");
      lcd.print(mins);
  }
  else
  {
      lcd.print(mins);
  }
   }

  

 



if(ahours == hours && amins == mins && amins != 0)
{
  tone(9, 1000, 200);
  delay(200);
  noTone(9);
delay(200);
}
else
{
    delay(300);
}
  lcd.clear();
 

  Serial.println(mins);
  Serial.println(hours);
  Serial.println("");
  Serial.println(amins);
  Serial.println(ahours);
  Serial.println("");
  Serial.println(activetime);
  Serial.println(prevoustime);
  Serial.println(starttime);
  Serial.println("");
}