/* svuk002@ec.auckland.ac.nz */

import java.io.*;
import java.sql.Date;

public class DirInfoAnswer {

	private String path; /* Path to the directory */
	private static String FILENAME = "dinf";
	
	public DirInfoAnswer (String path) {
		this.path = path;
		processDir (this.path);
	}
	
	
	/* You need to complete this method.
	 *
	 */
	private void processDir (String path) {
		try {
			BufferedWriter br = new BufferedWriter (new FileWriter (path + "/" + FILENAME));
			File directory = new File (path);
			File[] contents = directory.listFiles ();
			br.write ("Name                Type   Size      Last Modified\n");
			br.write ("\n");
			for (int i = 0; i < contents.length; i++) {
				if (!contents[i].getName ().equals (FILENAME)) {
					String name = contents[i].getName ();
					String type = contents[i].isDirectory () ? "dir" : "file";
					String size = "" + contents[i].length ();
					Date lastModified = new Date (contents[i].lastModified ());
					String mod = lastModified.toString ();
					br.write (formatEntry (name, type, size, mod) + "\n");
				}
			}
				
			br.close ();
		}
		catch (FileNotFoundException e) {
			e.printStackTrace ();
		}
		catch (IOException e) {
			e.printStackTrace ();
		}
	}
	
	/* Method below crudely formats an entry. Not to be modified. */
	private String formatEntry (String name, String type, String size, String modTime) {
		String toRet = name;
		int n = name.length ();
		for (int i = 0; i < 20 - n; i++)
			toRet += " ";
		toRet += type;
		n = type.length ();
		for (int i = 0; i < 7 - n; i++)
			toRet += " ";
		toRet += size;
		n = size.length ();
		for (int i = 0; i < 10 - n; i++)
			toRet += " ";
		toRet += modTime;
		return toRet;
	}
	
	
	/* You don't need to modify the main method */
	public static void main (String[] args) {
		try {
			new DirInfoAnswer (args[0]);
		}
		catch (ArrayIndexOutOfBoundsException e) {
			printUsage ();
		}
	}
	
	/* You don't need to modify this method */
	public static void printUsage () {
		System.out.println ("Usage: java DirInfo dir_name");
	}
}