#OS LAB 2/3

#OS LAB 2/3 made by Fensa08
import java.io.*;
import java.io.File;
import java.util.HashSet;
import java.util.concurrent.Semaphore;


public class FileScanner extends Thread {
    private static Semaphore semaphore;
    private String fileToScan;
    private static Long counter = (long)0;

    public FileScanner (String fileToScan) {
        this.fileToScan=fileToScan;
        counter++;
    }

    public static void printInfo(File file)  {
        if(file.isDirectory()){
            System.out.println("dir:" + file.getAbsolutePath() + " " + file.length());
        }else if(file.isFile()){
            System.out.println("file: " + file.getAbsolutePath() + " " + file.length());
        }
    }

    public static Long getCounter () {
        return counter;
    }


    public void run() {

        File file = new File(fileToScan);


        File [] files = file.listFiles();
        HashSet<FileScanner> thread = new HashSet<>();
        printInfo(file);
        for (File f : files) {

            if(!f.isDirectory()){
                printInfo(f);
            }else{
                FileScanner fajl = new FileScanner(f.getAbsolutePath());
                thread.add(fajl);
                fajl.start();
            }

            //TODO: wait for all the FileScanner-s to finish
            try{
                for(FileScanner fi : thread){
                    fi.join();
                }
            } catch (InterruptedException e) {
                System.out.println(e);
            }



        }

    }

    public static void main (String [] args) throws InterruptedException {
        String FILE_TO_SCAN = "C:\\Users\\Stefan\\Desktop\\Stefan";
        Semaphore semaohore = new Semaphore(1);
        counter = (long)0;

        FileScanner fileScanner = new FileScanner(FILE_TO_SCAN);
        fileScanner.start();
        fileScanner.join();
        //TODO wait for the fileScanner to finish


        System.out.println(getCounter());

    }
}