#include <LiquidCrystal_I2C.h>
#include <ThreeWire.h>
#include <RtcDS1302.h>
#define Bt_SetAlarm A0
#define Bt_Down A1
#define Bt_Up A2
#define Bt_SetTime A3
#define Buzzer 8
unsigned long t_0 = 0;
bool blinkState = false;
//*********** BUTTON STATE VARIABLEs ************************************************************************//
int Bt_Alarm_State = 1;
int Bt_Down_State = 1;
int Bt_Up_State = 1;
int Bt_SetTime_State = 1;
//***********************************************************************************************************//
int HH, MM, ss, DD, Day, MMMM, YYYY;                       //*********** TIME & DATE VARIABLEs **************//
int NewHH, NewMM, Newss, NewDD, NewDay, NewMMMM, NewYYYY;  //*********** NEW TIME & DATE VARIABLEs **********//
int AHH = -1, AMM = -1;
int mode = 0;
int Cursor1 = 0;  // ********** Time Cursor ******************************************************************//
int Cursor2 = 0;  // ********** Alarm Cursor *****************************************************************//
String dayOfWeek[] = { "Sun", "Mon", "Tue", "Wen", "Thu", "Fri", "Sat" };  // Day of week ********************//
//0x3F or 0x27
LiquidCrystal_I2C lcd(0x27, 16, 2);  //LCD Object
ThreeWire myWire(11, 10, 12);        // DAT, CLK, RST
RtcDS1302<ThreeWire> Rtc(myWire);    // RTC Object
//*************************************************************************************//
//********************************* Main SetUp ****************************************//
//*************************************************************************************//
void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  Rtc.Begin();
  //RtcDateTime currentTime = RtcDateTime(__DATE__ , __TIME__);
  //Rtc.SetDateTime(currentTime);
  pinMode(Bt_SetAlarm, INPUT_PULLUP);
  pinMode(Bt_Down, INPUT_PULLUP);
  pinMode(Bt_Up, INPUT_PULLUP);
  pinMode(Bt_SetTime, INPUT_PULLUP);
  pinMode(Buzzer, OUTPUT);
}
//*************************************************************************************//
//********************************* Main Loop *****************************************//
//*************************************************************************************//
void loop() {
  RtcDateTime now = Rtc.GetDateTime();
  // Assigning Varibles
  HH = now.Hour();
  MM = now.Minute();
  ss = now.Second();
  DD = now.Day();
  Day = now.DayOfWeek();
  MMMM = now.Month();
  YYYY = now.Year();
  HH = 12;
  MM = 12;
  ss = 12;
  DD = 1;
  Day = 1;
  MMMM = 12;
  YYYY = 2012;
  ReadInput();
  // **************** HOME MODE ***************//
  if (Cursor1 == 0 && Cursor2 == 0) {
    HomeView();
  }
  // *****************************************//
  // Time SETTING ***************************************************************************************//
  if (Bt_SetTime_State == 0) {
    Cursor1++;
    delay(200);
    NewHH = HH;
    NewMM = MM;
    Newss = ss;
    NewDD = DD;
    NewMMMM = MMMM;
    NewYYYY = YYYY;
    //lcd.clear();
  }
  while (Cursor1 == 1 || Cursor1 == 2 || Cursor1 == 3 || Cursor1 == 4 || Cursor1 == 5 || Cursor1 == 6) {
    ReadInput();
    SetTime();
    if (Bt_SetTime_State == 0) {
      Cursor1++;
      delay(200);
      if (Cursor1 > 6) {
        Cursor1 = 0;
        UdateTime();
      }
    }
    if (Cursor1 == 1) {
      unsigned long t_now = millis();
      if (t_now - t_0 >= 500) {
        lcd.setCursor(4, 1);
        if (blinkState) {
          lcd.print("  ");
        } else {
          if (NewHH < 10) lcd.print("0");
          lcd.print(NewHH);
        }
        t_0 = t_now;
        blinkState = !blinkState;  // Toggle blink state
      }
    }
    if (Cursor1 == 2) {
      unsigned long t_now = millis();
      if (t_now - t_0 >= 500) {
        lcd.setCursor(7, 1);
        if (blinkState) {
          lcd.print("  ");
        } else {
          if (NewMM < 10) lcd.print("0");
          lcd.print(NewMM);
        }
        t_0 = t_now;
        blinkState = !blinkState;  // Toggle blink state
      }
    }
    if (Cursor1 == 3) {
      unsigned long t_now = millis();
      if (t_now - t_0 >= 500) {
        lcd.setCursor(10, 1);
        if (blinkState) {
          lcd.print("  ");
        } else {
          if (Newss < 10) lcd.print("0");
          lcd.print(Newss);
        }
        t_0 = t_now;
        blinkState = !blinkState;  // Toggle blink state
      }
    }
    if (Cursor1 == 4) {
      unsigned long t_now = millis();
      if (t_now - t_0 >= 500) {
        lcd.setCursor(5, 0);
        if (blinkState) {
          lcd.print("  ");
        } else {
          if (NewDD < 10) lcd.print("0");
          lcd.print(NewDD);
        }
        t_0 = t_now;
        blinkState = !blinkState;  // Toggle blink state
      }
    }
    if (Cursor1 == 5) {
      unsigned long t_now = millis();
      if (t_now - t_0 >= 500) {
        lcd.setCursor(8, 0);
        if (blinkState) {
          lcd.print("  ");
        } else {
          if (NewMMMM < 10) lcd.print("0");
          lcd.print(NewMMMM);
        }
        t_0 = t_now;
        blinkState = !blinkState;  // Toggle blink state
      }
    }
    if (Cursor1 == 6) {
      unsigned long t_now = millis();
      if (t_now - t_0 >= 500) {
        lcd.setCursor(11, 0);
        if (blinkState) {
          lcd.print("    ");
        } else {
          lcd.print(NewYYYY);
        }
        t_0 = t_now;
        blinkState = !blinkState;  // Toggle blink state
      }
    }
    else{
      UdateTime();
      HomeView();
            unsigned long t_now = millis();
      if (t_now - t_0 >= 500) {
        lcd.setCursor(5, 0);
        lcd.print("               ");
        lcd.setCursor(0, 1);
        lcd.print("               ");
        t_0 = t_now;
      }
      
      }

  }
  // Alarm SETTING ***************************************************************************************//
  if (Bt_Alarm_State == 0) {
    Cursor2++;
    delay(200);
    AHH = HH;
    AMM = MM;
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Aarm Setting");
  }
  while (Cursor2 == 1 || Cursor2 == 2) {
    ReadInput();
    if (Bt_Alarm_State) {
      Cursor2++;
      delay(200);
      if (Cursor2 > 3) Cursor2 = 0;
    }
  }
  //***************************************************************************************************//
  //***************************************************************************************************//
  /*if (AHH == HH && AMM == MM) {
    ReadInput();
    if (Bt_SetTime_State == 0) {
      AHH = -1;
    }
    tone(Buzzer, 2000);
    delay(100);
    noTone(Buzzer);
    delay(100);
    }
    else {
    noTone(Buzzer);
    delay(10);
    }*/
}
//********************************* Home Vew *****************************************//
void HomeView() {
  //lcd.clear();
  lcd.setCursor(1, 0);
  lcd.print(dayOfWeek[Day]);
  lcd.print(" ");
  if (DD < 10) {
    lcd.print("0");
  }
  lcd.print(DD);
  lcd.print("/");
  if (MMMM < 10) {
    lcd.print("0");
  }
  lcd.print(MMMM);
  lcd.print("/");
  lcd.print(YYYY);
  lcd.setCursor(4, 1);
  if (HH < 10) {
    lcd.print("0");
  }
  lcd.print(HH);
  lcd.print(":");
  if (MM < 10) {
    lcd.print("0");
  }
  lcd.print(MM);
  lcd.print(":");
  if (ss < 10) {
    lcd.print("0");
  }
  lcd.print(ss);
}
//********************************* Reading Input **************************************//
void ReadInput() {
  Bt_Alarm_State = digitalRead(Bt_SetAlarm);
  Bt_Down_State = digitalRead(Bt_Down);
  Bt_Up_State = digitalRead(Bt_Up);
  Bt_SetTime_State = digitalRead(Bt_SetTime);
}
//****************************************************************************************
void SetAlarm() {
  //lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Alarm HH:MM");
  lcd.setCursor(6, 1);
  if (AHH < 10) lcd.print("0");
  lcd.print(AHH);
  lcd.setCursor(8, 1);
  lcd.print(":");
  lcd.setCursor(9, 1);
  if (AMM < 10) lcd.print("0");
  lcd.print(AMM);
  ReadInput();
  if (Bt_Down_State == 0) {
    AHH++;
    if (AHH > 23) AHH = 0;
    delay(200);
  }
  if (Bt_Up_State == 0) {
    AMM++;
    if (AMM > 60) AMM = 0;
    delay(150);
  }
  if (Bt_SetTime_State == 0) {
    mode = 0;
    lcd.clear();
    lcd.print("Alarm Ring At ");
    lcd.setCursor(9, 1);
    if (AHH < 10) lcd.print("0");
    lcd.print(AHH);
    lcd.print(":");
    if (AMM < 10) lcd.print("0");
    lcd.print(AMM);
    delay(500);
    lcd.clear();
  }
}
void SetTime() {
  ReadInput();
  if (Bt_Up_State == 0) {
    UP();
    delay(200);
  }
  if (Bt_Down_State == 0) {
    DOWN();
  }
}
// ***************************************************** //
// ***************** UP & DOWN FUNCTIONs *************** //
// ***************************************************** //
void UP() {
  if (Cursor1 == 1) {
    NewHH++;
    if (NewHH > 23) {
      NewHH = 0;
    }
    delay(200);
    lcd.setCursor(4, 1);
    if (NewHH < 10) lcd.print("0");
    lcd.print(NewHH);
  }
  if (Cursor1 == 2) {
    NewMM++;
    if (NewMM > 59) {
      NewMM = 0;
    }
    delay(200);
    lcd.setCursor(7, 1);
    if (NewMM < 10) lcd.print("0");
    lcd.print(NewMM);
  }
  if (Cursor1 == 3) {
    Newss++;
    if (Newss > 59) {
      Newss = 0;
    }
    delay(200);
    lcd.setCursor(10, 1);
    if (Newss < 10) lcd.print("0");
    lcd.print(Newss);
  }
  if (Cursor1 == 4) {
    NewDD++;
    if (NewDD > 31) {
      NewDD = 1;
    }
    delay(200);
    lcd.setCursor(5, 0);
    if (NewDD < 10) lcd.print("0");
    lcd.print(NewDD);
  }
  if (Cursor1 == 5) {
    NewMMMM++;
    if (NewMMMM > 12) {
      NewMMMM = 1;
    }
    delay(200);
    lcd.setCursor(8, 0);
    if (NewMMMM < 10) lcd.print("0");
    lcd.print(NewMMMM);
  }
  if (Cursor1 == 6) {
    NewYYYY++;
    delay(200);
    lcd.setCursor(11, 0);
    lcd.print(NewYYYY);
  }
  // *********************************************** //
}
void DOWN() {
  if (Cursor1 == 1) {
    NewHH--;
    if (NewHH < 0) {
      NewHH = 23;
    }
    delay(200);
    lcd.setCursor(4, 1);
    if (NewHH < 10) lcd.print("0");
    lcd.print(NewHH);
  }
  if (Cursor1 == 2) {
    NewMM--;
    if (NewMM < 0) {
      NewMM = 59;
    }
    delay(200);
    lcd.setCursor(7, 1);
    if (NewMM < 10) lcd.print("0");
    lcd.print(NewMM);
  }
  if (Cursor1 == 3) {
    Newss--;
    if (Newss < 0) {
      Newss = 59;
    }
    delay(200);
    lcd.setCursor(10, 1);
    if (Newss < 10) lcd.print("0");
    lcd.print(Newss);
  }
  if (Cursor1 == 4) {
    NewDD--;
    if (NewDD < 1) {
      NewDD = 31;
    }
    delay(200);
    lcd.setCursor(5, 0);
    if (NewDD < 10) lcd.print("0");
    lcd.print(NewDD);
  }
  if (Cursor1 == 5) {
    NewMMMM--;
    if (NewMMMM < 1) {
      NewMMMM = 12;
    }
    delay(200);
    lcd.setCursor(8, 0);
    if (NewMMMM < 10) lcd.print("0");
    lcd.print(NewMMMM);
  }
  if (Cursor1 == 6) {
    NewYYYY--;
    delay(200);
    lcd.setCursor(11, 0);
    lcd.print(NewYYYY);
  }
  // *********************************************** //
}
// ***************************************************** //
// UPDATE Time *************************************************************************//
void UdateTime() {
  RtcDateTime currentTime = RtcDateTime(NewYYYY, NewMMMM, NewDD, NewHH, NewMM, Newss);
  Rtc.SetDateTime(currentTime);
     HH = NewHH;
     MM = NewMM;
     ss = Newss;
     DD = NewDD;
     MMMM = NewMMMM;
     YYYY = NewYYYY;
}