import java.io.File;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.*;

public class naloga05 {

	static List<String> global = new ArrayList<String>();
	static int counter = 0;

	static void izbor(String args[]){

		du(args[1]);
        counter=0;
        global.clear();

	}

	static String[] getTabeloDatotek(String dir){

		File f = new File (dir);
		String[] list  = f.list();

		for (int i = 0; i<list.length; i++){
		     global.add(dir + File.separator + list[i]+"\n");
		    if (new File(dir + File.separator + list[i]).isDirectory()){
		    	getTabeloDatotek(dir + File.separator + list[i]);
		    }
		}
		String [] nw = new String[global.size()];
		global.toArray(nw);
		return nw;
	}


    static void du(String dir)
    {
    	getTabeloDatotek(dir);
        double vsota = 0.0;
        for(int i=0;i<global.size();i++)
        {
            File dat=new File(global.toArray()[i].toString());
            if(dat.isFile())
                vsota+=dat.length();
        }
        System.out.println("velikost datoteke  "+ vsota/1024.0 +" kB");
    }

    static void grep(String dir, String iskaniNiz){
        getTabeloDatotek(dir);
        int hit=0;
        for (int i=0;i<global.size();i++)
        {
            File dat = new File(global.toArray()[i].toString());
            if(dat.isFile()&& dat.canRead())
            {
                int ln=1;
                Scanner read= new Scanner(dat);
                while(read.hasNextLine())
                {
                    String line=read.nextLine().toUpperCase();
                    //System.out.println(beseda);
                    if(line.contains(iskaniNiz.toUpperCase()))
                    {
                        String[] word=line.split(" ");
                        System.out.printf(ln+" vrstica v " +dat+ "\n");
                        ln++;
                        for(int j=0;j<word.length;j++)
                        {
                            if(word[j].contains(iskaniNiz.toUpperCase()))
                                hit++;
                        }
                     }
                  }
                }
            }
        System.out.println("stevilo zadetkov " + hit);
       }

	  public static void main(String args[]) {


		   String ime = "c:\\Users\\Rok\\Desktop\\javaTest\\delo\\test";
		   // System.out.printf("%s", Arrays.toString(getTabeloDatotek(ime)));
		   izbor(args);
		  }

}