package types;

import java.util.Scanner;

public class IO {

  private static Scanner scanner = new Scanner (System.in);
  private static final String zeros32 = "00000000000000000000000000000000";
  private static final String zeros = zeros32 + zeros32;

  public static int promptForInt (String name) {
    System.out.print ("int " + name + ">");
    return scanner.nextInt ();
  }
  
  public static byte promptForByte (String name) {
    System.out.print ("byte " + name + ">");
    return scanner.nextByte ();
  }
  
  public static short promptForShort (String name) {
    System.out.print ("short " + name + ">");
    return scanner.nextShort ();
  }
  
  public static long promptForLong (String name) {
    System.out.print ("long " + name + ">");
    return scanner.nextLong ();
  }
  
  public static float promptForFloat (String name) {
    System.out.print ("float " + name + ">");
    return scanner.nextFloat ();
  }
  
  public static double promptForDouble (String name) {
    System.out.print ("double " + name + ">");
    return scanner.nextDouble ();
  }
  
  public static boolean promptForBoolean (String name) {
    System.out.print ("boolean " + name + ">");
    return scanner.nextBoolean ();
  }
 
  public static void writeResult (String text, Object value) {
    System.out.println (text + "=" + value);
  }

  public static void writeBinary (String text1, Object value1, String text2, Object value2,
      String text3, Object value3) {
    writeBinary (text1, value1);
    writeBinary (text2, value2);
    writeBinary (text3, value3);
  }

  public static void writeBinary (String text1, Object value1, String text2, Object value2) {
    writeBinary (text1, value1);
    writeBinary (text2, value2);
  }

  public static void writeBinary (String text, Object value) {
    String binary = null;
    if (value instanceof Byte) {
      binary = format (Long.toBinaryString ((Byte) value), 8);
    } else if (value instanceof Short) {
      binary = format (Integer.toBinaryString ((Short) value), 16);
    } else if (value instanceof Integer) {
      binary = format (Integer.toBinaryString ((Integer) value), 32);
    } else if (value instanceof Long) {
      binary = format (Long.toBinaryString ((Long) value), 64);
    } else if (value instanceof Float) {
      binary = Integer.toBinaryString (Float.floatToIntBits (((Float) value)));
      binary = format (binary, 32, 1, 9);
    } else if (value instanceof Double) {
      binary = Long.toBinaryString (Double.doubleToLongBits (((Double) value)));
      binary = format (binary, 64, 1, 12);
    } else if (value instanceof java.lang.Boolean) {
      binary = value + " ";
    } else {
      binary = value + " isn't a primitive type; it's a " + value.getClass ();
    }
    System.out.println (text + " = " + binary);
  }

  private static String format (String binary, int digits) {
    return zeros.substring (0, Math.max (0, digits - binary.length ())) + binary;
  }

  private static String format (String binary, int digits, int splitAt1, int splitAt2) {
    binary = format (binary, digits);
    return binary.substring (0, splitAt1)
        + " " + binary.substring (splitAt1, splitAt2) 
        + " " + binary.substring (splitAt2, digits);
  }
}