package org.vamsas.test.simpleclient;

import java.util.Iterator;
import java.util.Vector;

public class CommandProcessor {
  /**
   * this is not getOPT!!!! - processes a *series* of space separated commands - some of which take arguments.
   */
  private Vector commands;
  /* static {
    ClientsFileTest.commands=new Vector();
    ClientsFileTest.commands.add(new String("add"));
    ClientsFileTest.commands.add(new String("remove"));
    ClientsFileTest.commands.add(new String("list"));    
    ClientsFileTest.commands.add(new String("clear"));
    ClientsFileTest.commands.add(new String("watch"));    
    ClientsFileTest.commands.add(new String("monitor"));    
  } */

  public int addCommand(String cmd, int argneed, String complainString) {
    int cnum=0;
    if (commands==null)
      commands = new Vector();
    else 
      cnum = commands.size();
    Vector cv = new Vector();
    cv.add(new String(cmd));
    cv.add(new Integer(argneed));
    cv.add(new String(complainString));
    commands.add(cv);
    return cnum;
  }
 
  /**
   * Integer argl, Integer argpos, String cmd, Integer argneed, String msg in vector
   */
  public void complainArgs(int argl, int argpos, Vector ca) {
    int argneed = ((Integer) ca.get(1)).intValue();
    if (argl-argpos<argneed)
      throw new Error(((String) ca.get(0))+" at position "+argpos+" needs "+argneed+" arguments : "+(String) ca.get(2));
  }
  /**
   * find and verify a command
   * @param args argstring
   * @param argpos position to check for command
   * @return matching command or -1
   */
  public int getCommand(String[]args, int argpos) {
    Iterator coms = commands.iterator();
    int com=-1, argc;
    argc=argpos;
    while ((coms!=null) && coms.hasNext()) {
      com++;
      Vector comnext = (Vector) coms.next();
      if (args[argc].toLowerCase().equals((String) comnext.get(0))) {
        if (comnext.size()>2)
          complainArgs(args.length, argc+1, comnext);
        return com;
      }
    }
    return -1;
        
  }
}