import java.io.*;
import java.util.*;

public class WordCounter
{
   
   String fileName;
   int numBytes = 0;
   int numWords = 0;
   int numLines = 0;
   
   boolean counted = false;
   String errorMessage = null;
   
   public WordCounter(String file)
   {
      fileName = file;
      
      counted = false;
      errorMessage = null;
   }
   
   public boolean process()
   {
      InputStream in;
      
      errorMessage = null;
      
      try
      {
	 in = new FileInputStream(fileName);
      }
      catch (Exception e)
      {
	 errorMessage = "Error opening file: " + fileName + ".";
	 return false;
      }
      
      int byteIn = 0;
      boolean readNewline = true;
      boolean readWhitespace = true;
      
      try
      {
	 while ((byteIn = in.read()) >= 0)
	 {
	    char ch = (char)byteIn;
	    
	    // always count bytes.
	    numBytes++;
	    
	    // if we read a newline the last time, 
	    // then count a newline.
	    if (readNewline)
	       numLines++;
	    
	    // set for next time.
	    readNewline = (ch == '\n');
	    
	    // if we are going from whitespace to non-whitespace
	    // then count this word.
	    if (readWhitespace && !Character.isWhitespace(ch))
	       numWords++;
	    
	    // set this for next time.
	    readWhitespace = Character.isWhitespace(ch);
	    
	 }
      }
      catch (IOException e)
      {
	 errorMessage = "IO Error occured processing file: " + fileName + ".";
	 return false;
      }
      
      
      counted = true;
      
      return true;

   }
	    
   
   public String getErrorMessage()
   {
      return errorMessage;
   }

   public String toString()
   {
      if (errorMessage != null)
	 return "WordCounter: ERROR: " + errorMessage;
      
      if (!counted)
	 return "WordCounter: preparing to count: " + fileName;
      
      return ("WordCounter: " + fileName + "\n\tbytes\t" + numBytes
	      + "\n\twords\t" + numWords
	      + "\n\tlines\t" + numLines);
	      
   }
 
   public static void main(String [] args)
   {
      if (args.length != 1)
      {
	 System.err.println("USAGE: WordCounter file");
	 System.exit(-1);
      }
      
      WordCounter wc = new WordCounter(args[0]);
      
      wc.process();
      
      System.out.println(wc);
   }
   
}