package dates;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.Month;

/**
 *
 * @author Lefteris Moussiades
 */
class DatesTimes {

    static void currentDate() {
        LocalDate d = LocalDate.now();
        //LocalDate d1 = LocalDate.now();
        System.out.println(d);
        
        for (int i = 0; i < 1000; i++) {
            LocalTime t = LocalTime.now();
            System.out.println(t);
        }
        LocalDateTime dt = LocalDateTime.now();
        System.out.println(dt);
        System.out.println();
    }

    static void specificDate() {
        LocalDate d = LocalDate.of(1971, Month.DECEMBER, 15);
        LocalDate d1 = LocalDate.of(1971, 12, 15);
        System.out.println(d);
        System.out.println(d.equals(d1));

        LocalTime t = LocalTime.of(12, 50, 43);
        LocalTime t1 = LocalTime.of(12, 50, 43, 625);
        System.out.println(t);
        System.out.println(t1);

        LocalDateTime dt = LocalDateTime.of(1971, Month.DECEMBER, 15, 12, 50, 42, 973);
        System.out.println(dt);

        System.out.println();
    }

    static void MonthNums() {
        for (int i = 1; i <= 12; i++) {
            System.out.println(LocalDate.of(2000, i, 1));
        }
        System.out.println();
    }

    static void dtCreation() {
        LocalTime t1 = LocalTime.of(3, 35);
        LocalDate d1 = LocalDate.of(1920, 1, 9);
        LocalDateTime dt1 = LocalDateTime.of(d1, t1);
        System.out.println(dt1);
    }

    static void useConstructor() {
        // LocalDate d=new LocalDate();
    }

    static void wrongDate() {
        LocalDate dt = LocalDate.of(2010, Month.FEBRUARY, 30);
    }

    static void addToDate() {
        LocalDate today = LocalDate.now();
        LocalDate tommorow = today.plusDays(1);
        LocalDate afterAWeek = today.plusWeeks(1);
        LocalDate afterAMonth = today.plusMonths(1);
        LocalDate afterAYear = today.plusYears(1);
        System.out.println("today :" + today);
        System.out.println("tommorow "+tommorow);
        System.out.println("afterAWeek "+afterAWeek);
        System.out.println("afterAMonth "+afterAMonth);
        System.out.println("afterAYear :"+afterAYear);
    }

    static void addToTime() {
        LocalTime now = LocalTime.now();
        LocalTime after2Hours = now.plusHours(2);
        LocalTime after2Minutes = now.plusMinutes(2);
        LocalTime after2Seconds = now.plusSeconds(2);
        LocalTime after1MillionNanos = now.plusNanos(1_000_000);
        System.out.println("now "+now);
        System.out.println("after2Hours "+after2Hours);
        System.out.println("after2Minutes "+after2Minutes);
        System.out.println("after2Seconds "+after2Seconds);
        System.out.println("afterMillionNanos "+after1MillionNanos);
    }

    static void subtractDate() {
        LocalDate today = LocalDate.now();
        LocalDate yesterday = today.minusDays(1);
        LocalDate beforeAWeek = today.minusWeeks(1);
        LocalDate beforeAMonth = today.minusMonths(1);
        LocalDate beforeAYear = today.minusYears(1);
        System.out.println(today);
        System.out.println(yesterday);
        System.out.println(beforeAWeek);
        System.out.println(beforeAMonth);
        System.out.println(beforeAYear);
    }

    static void addDateTime() {
        LocalDateTime now = LocalDateTime.now();
        LocalDateTime tommorow = now.plusDays(1);
        LocalDateTime afterAWeek = now.plusWeeks(1);
        LocalDateTime afterAMonth = now.plusMonths(1);
        LocalDateTime afterAYear = now.plusYears(1);
        LocalDateTime after2Hours = now.plusHours(2);
        LocalDateTime after2Minutes = now.plusMinutes(2);
        LocalDateTime after2Seconds = now.plusSeconds(2);
        LocalDateTime after1MillionNanos = now.plusNanos(1000000);
        System.out.println(now);
        System.out.println(tommorow);
        System.out.println(afterAWeek);
        System.out.println(afterAMonth);
        System.out.println(afterAYear);
        System.out.println(after2Hours);
        System.out.println(after2Minutes);
        System.out.println(after2Seconds);
        System.out.println(after1MillionNanos);
    }

    static void chaining() {
        LocalDateTime dt1 = LocalDateTime.of(LocalDate.now(), LocalTime.now());
        LocalDateTime dt2 = LocalDateTime.now();
        System.out.println(dt1);
        System.out.println(dt2);
        
        dt1 = dt1.plusYears(1).plusMonths(1); //.minusWeeks(1).minusHours(5);
        System.out.println(dt1);
    }

    static void immutability() {
        LocalDate dt = LocalDate.of(2010, Month.MARCH, 1);
        LocalDate dt1=dt;
        dt=dt.plusYears(10);
        System.out.println(dt);
        System.out.println(dt1);
    }

    static void getters() {
        LocalDateTime dt = LocalDateTime.now();
        System.out.println(dt.getDayOfMonth() + "/" + dt.getMonth() + "/" + dt.getYear());
    }

    public static void main(String args[]) {
        //currentDate();
        //specificDate();
        //MonthNums();
        //dtCreation();
        //useConstructor();
        //wrongDate();
        //addToDate();
        //addToTime();
        //subtractDate();
        //addDateTime();
        //chaining();
        immutability();
        //getters();

    }

}