import java.io.*;
import java.text.DateFormat;
import java.util.Date;


public class ls extends VMachine
{
    public ls()
    {
    }
    
    public void run()
    {
        
        try
        {
            File fileObject;
            String bytelength;
            int dircount = 0;
            int filecount = 0;
            long totalbytecount = 0;      
            if(args[0].length() == 0)
            {
                fileObject = new File(sysapi.findUser(owner).getcurrentPath());
            }
            else
            {
                fileObject = new File(sysapi.findUser(owner).getcurrentPath() + args[0]);
            }
            File[] listing = fileObject.listFiles();
            if(fileObject.isDirectory())
            {
                for(int x = 0; x < listing.length; x++)
                {
                    if(listing[x].isDirectory())
                    {
                        dircount++;
                        sysapi.Write(OUT,DateFormat.getTimeInstance().format(new Date(listing[x].lastModified())) + "  " +  DateFormat.getDateInstance().format(new Date(listing[x].lastModified())) + "   [DIR]  " + "       " + listing[x].getName() + "\n");
                    }
                    else if(listing[x].isFile())
                    {
                        filecount++;
                        totalbytecount += listing[x].length();
                        bytelength = new String().valueOf(listing[x].length());
                        for(int i=0;bytelength.length() < 6;i++)
                        {
                            bytelength = " " + bytelength;
                        }
                        sysapi.Write(OUT,DateFormat.getTimeInstance().format(new Date(listing[x].lastModified())) + "  " +  DateFormat.getDateInstance().format(new Date(listing[x].lastModified())) + "          " + bytelength + " " + listing[x].getName() + "\n");
                    }
                }
                if(filecount > 0)
                {
                    sysapi.Write(OUT,new String().valueOf(totalbytecount) + " Bytes in " + new String().valueOf(filecount) + " File(s)\n");
                }
                if(dircount > 0)
                {
                    sysapi.Write(OUT,new String().valueOf(dircount) + " Directories(s)\n");
                }
            }
            else
            {
                sysapi.Write(OUT,"Error -- Directory does not exist.\n");
            }
            sysapi.Exit(vmh,owner);
        }
        catch (Exception err)
        {
            System.out.println(err);
        }
    }
    
}