/**
    A program to test the CourseRecord, StudentFile,
    and StudentRecord classes.
*/


import java.util.*;

public class A4
{

   /**
       Finds the student record, if any, with a given ID number.
       Traverses it if found, prints an error message otherwise.
       In either case, skips a line afterwards.
   */

   public static void findAndTraverseStudentRecord(
                      StudentFile sf, int n)                        {
      StudentRecord sr = sf.findStudentRecord(n);
      if (sr == null)
        System.out.println("no record -- can't traverse");
      else
        sr.traverse();
      System.out.println();                                         }



    /**
        A test program for Assignment 4, CS 146, Spring 2003
        @param args is ignored
     */
    public static void main(String[] args)                           {
      StudentFile sf = new StudentFile();
      StudentRecord sr = new StudentRecord("john", "doe", 1776);

      System.out.println();
      System.out.print(" " +
        sr.add(null));
      System.out.print(" " +
        sr.add(new CourseRecord(1046,1997,-85)));
      System.out.print(" " +
        sr.add(new CourseRecord(1042,1997,79)));
      System.out.print(" " +
        sr.add(new CourseRecord(2146,1998,81)));
      System.out.print(" " +
        sr.add(new CourseRecord(2146,1998,99)));   // an update
      System.out.print(" " +
        sr.add(new CourseRecord(2151,1999,93)));
      System.out.print(" " +
        sr.add(new CourseRecord(1031,1997,105)));
      System.out.print(" " +
        sr.add(new CourseRecord(1046,1997,85)));   // an update
      System.out.print(" " +
        sr.add(new CourseRecord(2151,1999,94)));   // an update
      System.out.println();
      System.out.println();

      sr.traverse();
      System.out.println();

      System.out.print(sr.findGrade(1000,1997) + " ");
      System.out.print(sr.findGrade(1046,1997) + " ");
      System.out.print(sr.findGrade(1031,1997) + " ");
      System.out.print(sr.findGrade(1046,1998) + " ");
      System.out.print(sr.findGrade(2146,1998) + " ");
      System.out.print(sr.findGrade(2151,1999) + " ");
      System.out.print(sr.findGrade(2222,1999) + " ");
      System.out.println();
      System.out.println();

      sf.add(sr);

      System.out.println(sf.add(new StudentRecord("jane", "doe", 1984)));
      System.out.println(sf.add(new StudentRecord("jose", "state", 1857)));
      System.out.println(sf.add(null));
      System.out.println(sf.add(new StudentRecord("pete","lee",2001)));
      System.out.println(sf.add(new StudentRecord("repeat","lee",2001)));
      System.out.println(sf.add(new StudentRecord("joyce","daley",1001)));
      System.out.println(sf.add(new StudentRecord("rejoice","daley",1001)));
      System.out.println();

      findAndTraverseStudentRecord(sf,1492);
      findAndTraverseStudentRecord(sf,1001);
      findAndTraverseStudentRecord(sf,1776);
      findAndTraverseStudentRecord(sf,1857);
      findAndTraverseStudentRecord(sf,1984);
      findAndTraverseStudentRecord(sf,2001);

      List ls = sf.getCourseList(1492);
      System.out.println(ls);
      ls = sf.getCourseList(1861);
      System.out.println(ls);
      ls = sf.getCourseList(1776);
      Iterator it = ls.iterator();
      it.next();
      it.remove();
      System.out.println(ls);
      sr.traverse();

      System.out.println();
      sf.traverseByNumber();
        
        
    }
    
}