package username.dates;

import java.io.PrintWriter;
import java.io.InputStreamReader;
import java.io.BufferedReader;

/**
 * Some simple tests of dates.
 * 
 * @author Samuel A. Rebelsky
 * @version 1.1 of February 2006
 */
public class DateTester
{
  public static void main(String[] args)
    throws Exception
  {
    PrintWriter pen = new PrintWriter(System.out, true);
    BufferedReader eyes = new BufferedReader(new InputStreamReader(System.in));

    // Print basic information about the month.
    for (int i = 1; i <= 12; i++) {
      pen.println(DateHelper.nameOfMonth(i) + " has " +
        DateHelper.daysInMonth(i) + " days.");
    } // for
    pen.println();

    // Read in a birthday.
    int month;
    do {
      pen.print("Please enter the month of your birthday: ");
      pen.flush();
      month = DateHelper.monthNum(eyes.readLine());
      if (month == 0) {
        pen.println("Sorry, I didn't understand that.");
      }
    } while (month == 0);
    int day = 0;
    do {
      pen.print("Please enter the day of your birthday: ");
      pen.flush();
      try {
        day = Integer.parseInt(eyes.readLine());
        if ((day < 1) || (day > DateHelper.daysInMonth(month))) {
          pen.println("Please enter a date between 1 and " 
            + DateHelper.daysInMonth(month));
          day = 0;
        } // if the day is invalid
      } // try
      catch (Exception e) {
        pen.println("That wasn't a numeric date.");
        day = 0;
      }
    } while (day == 0);
    MonthDay birthday = new MonthDay(month, day);
    pen.println();

    // Explain where in the year the birthday falls.
    pen.println("Did you know that " + birthday + " falls on day " 
      + birthday.dayOfYear() + " of the year?");
    pen.println();

    // Figure out which holiday is closer.
    MonthDay xmas = new MonthDay(12,25);
    MonthDay independence = new MonthDay(7,4);
    int deltaxmas = DateHelper.daysBetween(xmas,birthday);
    int deltaindependence = DateHelper.daysBetween(independence,birthday);
    if (deltaxmas < deltaindependence) {
      pen.println(birthday + " is closer to " + xmas + " than to " + independence);
    }
    else if (deltaxmas > deltaindependence) {
      pen.println(birthday + " is closer to " + independence + " than to " + xmas);
    }
    else {
      pen.println(birthday + " is equidistant from " + independence + " and " + xmas);
    }
  } // main(String[])
} // class DateTester