import java.io.*; 

class SimplePersonMenu {

  private BufferedReader br;

  public SimplePersonMenu() {
    br = new BufferedReader (new InputStreamReader (System.in));
  }

  public void display() {
    System.out.println (".....Menu.....");
    System.out.println ("1. Create a person");
    System.out.println ("2. Display the person");
    System.out.println ("3. Display the person's name");
    System.out.println ("4. Display the person's id number");
    System.out.println ("5. Set the person's id number");
    System.out.println ("6. Exit");
  }

  
  public int getSelection() throws IOException, NumberFormatException,
                                   SimplePersonMenuException {

    System.out.println ("");
    System.out.print ("Enter your choice: ");

    int selection = Integer.parseInt (br.readLine());

    if ( (selection < 1) || (selection > 6) )
      throw new SimplePersonMenuException ("Selection, " + selection +
           " wasn't between 1 and 6, inclusive.");

   return selection;
  }


  public SimplePerson createPerson() throws SimplePersonMenuException {

    try { 
      System.out.print ("Please enter the person's name: ");
      String name = br.readLine();
  
      System.out.print ("Please enter the person's id number: ");
      int idNumber = Integer.parseInt (br.readLine());

      return new SimplePerson (name, idNumber);
    } 
    catch (NumberFormatException ioe) {
      throw new SimplePersonMenuException ("Can't create a simple person because the student number wasn't an integer.");
    }
    catch (IOException ioe) {
      throw new SimplePersonMenuException ("Can't set the idNumber, because of keyboard input problems.");
    }

  }

  public void changeID (SimplePerson p) throws SimplePersonMenuException{

    try { 
      System.out.print ("Please enter the person's id number: ");
      int idNumber = Integer.parseInt (br.readLine());

      p.setId (idNumber);
    } 
    catch (NumberFormatException nfe) {
      throw new SimplePersonMenuException ("Can't change the id number, because ti needs to eb an integer.");
    }
    catch (IOException ioe) {
      throw new SimplePersonMenuException ("Can't create a simple person because of keyboard inut problems.");
    }
  }


  
  public static void main (String[] args) {
    SimplePerson p = null;

    int selection = -1;

    while (selection != 6) {
      try { 
        SimplePersonMenu menu = new SimplePersonMenu();
        menu.display();
      
        selection = menu.getSelection();
  
        if (selection == 1) {
          p = menu.createPerson();
        }
        if (selection == 2) {
          // Display the person
          System.out.println (p);
        }
        if (selection == 3) {
          // Display the person's name
          System.out.println (p.getName());
        }
        if (selection == 4) {
          // Display the person's id number
          System.out.println (p.getIdNumber());
        }
        if (selection == 5) {
          // Change the person's id number
          menu.changeID(p);
        }
      }
      catch (IOException ioe) {
        System.out.println ("Shit. Fuck. Damn. Can't read from the keyboard.");
      }
      catch (NumberFormatException nfe) {
        System.out.println ("You didn't enter a number, so we're dead. Fuck!");
      }
      catch (SimplePersonMenuException spme) {
        System.out.println (spme);
      }
    }
  }
}