package JavaOOP.HomeWork1;

import java.time.LocalDate;

public class DaysFromBirthDateCalculator {

    public static void main(String[] args) {

        long daysNumber1 = daysFromBirthDate("1972-12-28");
        System.out.println("Number of days from birthday: " + daysNumber1);
        long daysNumber2 = daysFromBirthDate("2005-05-01");
        System.out.println("Number of days from birthday: " + daysNumber2);
    }

    public static long daysFromBirthDate(String birthDateString) {
        if (birthDateString.isEmpty()) {
            throw new IllegalArgumentException("Empty string of date!");
        }

        LocalDate formatBirthDate = LocalDate.parse(birthDateString);

        long birthDay = formatBirthDate.toEpochDay();
        long thisDay = LocalDate.now().toEpochDay();

        return thisDay - birthDay;
    }
}

//Output
//daysFromBirthDate("1972-12-28") ---> 16607 (LocalDate.now() - 2018-06-17);
//daysFromBirthDate("2005-05-01") ---> 4795 (LocalDate.now() - 2018-06-17);