#include <EEPROM.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DS1307RTC.h> // Include DS1307 library

#define I2C_ADDR 0x27, 16, 2 // Add your I2C address here.
#define Rs_pin 0
#define Rw_pin 1
#define En_pin 2
#define BACKLIGHT_PIN 3
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7

int d, dg, cnt;

DS1307 rtc; // Initialize DS1307 object

LiquidCrystal_I2C lcd(I2C_ADDR, En_pin, Rw_pin, Rs_pin, D4_pin, D5_pin, D6_pin, D7_pin);

// Initialize Time-data structure
Time t;
int hh = 0, mm = 0, ss = 0;
#define buzzerPin 8

// the 8 arrays that form each segment of the custom numbers
byte bar1[8] =
{
    B11100,
    B11110,
    B11110,
    B11110,
    B11110,
    B11110,
    B11110,
    B11100
};
byte bar2[8] =
{
    B00111,
    B01111,
    B01111,
    B01111,
    B01111,
    B01111,
    B01111,
    B00111
};
byte bar3[8] =
{
    B11111,
    B11111,
    B00000,
    B00000,
    B00000,
    B00000,
    B11111,
    B11111
};
byte bar4[8] =
{
    B11110,
    B11100,
    B00000,
    B00000,
    B00000,
    B00000,
    B11000,
    B11100
};
byte bar5[8] =
{
    B01111,
    B00111,
    B00000,
    B00000,
    B00000,
    B00000,
    B00011,
    B00111
};
byte bar6[8] =
{
    B00000,
    B00000,
    B00000,
    B00000,
    B00000,
    B00000,
    B11111,
    B11111
};
byte bar7[8] =
{
    B00000,
    B00000,
    B00000,
    B00000,
    B00000,
    B00000,
    B00111,
    B01111
};
byte bar8[8] =
{
    B11111,
    B11111,
    B00000,
    B00000,
    B00000,
    B00000,
    B00000,
    B00000
};

void setup() {
    lcd.setBacklightPin(BACKLIGHT_PIN, POSITIVE); // LCD Backlight ON
    lcd.setBacklight(HIGH);

    pinMode(buzzerPin, OUTPUT);
    rtc.begin(); // Initialize DS1307
    lcd.begin(16, 2);

  
    // Assigns each segment a write number
    lcd.createChar(1, bar1);
    lcd.createChar(2, bar2);
    lcd.createChar(3, bar3);
    lcd.createChar(4, bar4);
    lcd.createChar(5, bar5);
    lcd.createChar(6, bar6);
    lcd.createChar(7, bar7);
    lcd.createChar(8, bar8);
} //END OF VOID SETUP()

// DRAW THE NUMBERS
void custom0(int col) { // uses segments to build the number 0
    lcd.setCursor(col, 0);
    lcd.write(2);
    lcd.write(8);
    lcd.write(1);
    lcd.setCursor(col, 1);
    lcd.write(2);
    lcd.write(6);
    lcd.write(1);
}

void custom1(int col) { // number 1
    lcd.setCursor(col, 0);
    lcd.write(32);
    lcd.write(32);
    lcd.write(1);
    lcd.setCursor(col, 1);
    lcd.write(32);
    lcd.write(32);
    lcd.write(1);
}

void custom2(int col) { // number 2
    lcd.setCursor(col, 0);
    lcd.write(5);
    lcd.write(3);
    lcd.write(1);
    lcd.setCursor(col, 1);
    lcd.write(2);
    lcd.write(6);
    lcd.write(6);
}

void custom3(int col) { // number 3
    lcd.setCursor(col, 0);
    lcd.write(5);
    lcd.write(3);
    lcd.write(1);
    lcd.setCursor(col, 1);
    lcd.write(7);
    lcd.write(6);
    lcd.write(1);
}

void custom4(int col) { // number 4
    lcd.setCursor(col, 0);
    lcd.write(2);
    lcd.write(6);
    lcd.write(1);
    lcd.setCursor(col, 1);
    lcd.write(32);
    lcd.write(32);
    lcd.write(1);
}

void custom5(int col) { // number 5
    lcd.setCursor(col, 0);
    lcd.write(2);
    lcd.write(3);
    lcd.write(4);
    lcd.setCursor(col, 1);
    lcd.write(7);
    lcd.write(6);
    lcd.write(1);
}

void custom6(int col) { // number 6
    lcd.setCursor(col, 0);
    lcd.write(2);
    lcd.write(3);
    lcd.write(4);
    lcd.setCursor(col, 1);
    lcd.write(2);
    lcd.write(6);
    lcd.write(1);
}

void custom7(int col) { // number 7
    lcd.setCursor(col, 0);
    lcd.write(2);
    lcd.write(8);
    lcd.write(1);
    lcd.setCursor(col, 1);
    lcd.write(32);
    lcd.write(32);
    lcd.write(1);
}

void custom8(int col) { // number 8
    lcd.setCursor(col, 0);
    lcd.write(2);
    lcd.write(3);
    lcd.write(1);
    lcd.setCursor(col, 1);
    lcd.write(2);
    lcd.write(6);
    lcd.write(1);
}

void custom9(int col) { // number 9
    lcd.setCursor(col, 0);
    lcd.write(2);
    lcd.write(3);
    lcd.write(1);
    lcd.setCursor(col, 1);
    lcd.write(7);
    lcd.write(6);
    lcd.write(1);
}

//PRINT THE NUMBERS:
void printNumber(int value, int col) {
    if (value == 0) {
        custom0(col);
    } if (value == 1) {
        custom1(col);
    } if (value == 2) {
        custom2(col);
    } if (value == 3) {
        custom3(col);
    } if (value == 4) {
        custom4(col);
    } if (value == 5) {
        custom5(col);
    } if (value == 6) {
        custom6(col);
    } if (value == 7) {
        custom7(col);
    } if (value == 8) {
        custom8(col);
    } if (value == 9) {
        custom9(col);
    }
}

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void loop() {

    ss = 0;

    while (ss <= 15) {
        checkAlarm(); //CHECK ALARM 
        showBig();
        ss++;
    }
    lcd.clear();

    while (ss <= 25) {
        showSmall();
        ss++;
    }
    lcd.clear();

    while (ss <= 45) {
        showBig();
        ss++;
    }
    lcd.clear();

    while (ss <= 55) {
        showSmall();
        ss++;
    }
    lcd.clear();

    while (ss <= 59) {
        showBig();
        ss++;
    }
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void showBig() {

    rtc.updateTime(); // Update time from DS1307 RTC

    hh = rtc.getHours();
    mm = rtc.getMinutes();
    ss = rtc.getSeconds();

    switch (cnt) {
    case 1:
        mm = mm + dg;
        dg = 0;
        if (mm > 59) {
            mm = 59;
        }
        if (mm < 0) {
            mm = 0;
        }
        break;

    case 2:
        hh = hh + dg;
        dg = 0;
        if (hh > 12) { // ROLLOVER TO 1 AFTER 12
            hh = 1;
        }
        if (hh < 0) {
            hh = 0;
        }
        break;
    }

    if (hh >= 12) {
        lcd.setCursor(14, 1);
        lcd.print("PM");
        hh = hh - 12;
        if (hh == 0) {
            hh = 12;
        }
    }

    else {
        if (hh == 0) {
            hh = 12;
        }
        lcd.setCursor(14, 1);
        lcd.print("AM");
    }
/////////////////////

    d = hh % 10;
    printNumber(d, 3);
    d = hh / 10;
    printNumber(d, 0);
    d = mm % 10;
    printNumber(d, 10);
    d = mm / 10;
    printNumber(d, 7);
    // show seconds at upper right
    lcd.setCursor(14, 0);
    lcd.print(ss / 10);
    lcd.print(ss % 10);

    if (cnt == 0) {
        ss++;
        lcd.setCursor(6, 0);
        lcd.print(" ");
        lcd.setCursor(6, 1);
        lcd.print(" ");
        delay(500);
        lcd.setCursor(6, 0);
        lcd.print(".");
        lcd.setCursor(6, 1);
        lcd.print(".");
        delay(500);
    }
} //END of showBig()

/////////////////////////////

int dd = 0, bb = 0, set_day;
int yy = 0;
String Day = "  ";

/////////////////////////////

void showSmall() {

    rtc.updateTime(); // Update time from DS1307 RTC

    hh = rtc.getHours();
    mm = rtc.getMinutes();
    ss = rtc.getSeconds();
    dd = rtc.getDate();
    bb = rtc.getMonth();
    yy = rtc.getYear();

    lcd.setCursor(1, 0);
    lcd.print((hh / 10) % 10);
    lcd.print(hh % 10);
    lcd.print(":");
    lcd.print((mm / 10) % 10);
    lcd.print(mm % 10);
    lcd.print(":");
    lcd.print((ss / 10) % 10);
    lcd.print(ss % 10);
    lcd.print(" ");

    lcd.setCursor(11, 0);
    lcd.print(rtc.getTemperature());
    lcd.write(223); // symbol for degree
    lcd.print("C");
    lcd.print("  ");

    lcd.setCursor(0, 1);
    lcd.print(rtc.getDayStr());
    lcd.print("  ");

    lcd.print(rtc.getMonthStr());
    lcd.print(" ");

    lcd.print((dd / 10) % 10);
    lcd.print(dd % 10);
    lcd.print(" ");

    lcd.print(yy);
} //END of showSmall() 

/////////////////////////////////////////

void checkAlarm() {

    rtc.updateTime(); // Update time from DS1307 RTC

    if (hh == 6 && mm == 30) {

        digitalWrite(buzzerPin, HIGH); //active buzzer
        delay(60);
        digitalWrite(buzzerPin, LOW);
        delay(60);
        digitalWrite(buzzerPin, HIGH);
        delay(60);
        digitalWrite(buzzerPin, LOW);
        delay(60);
        digitalWrite(buzzerPin, HIGH);
        delay(60);
        digitalWrite(buzzerPin, LOW);
        delay(60);
        digitalWrite(buzzerPin, HIGH);
        delay(60);
        digitalWrite(buzzerPin, LOW);
        delay(60);
    }
    else {
        digitalWrite(buzzerPin, LOW);
    }
    delay(100);
}