package hash;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.logging.Level;
import java.util.logging.Logger;

public class main {

    /**
     * @param args
     * @throws NoSuchAlgorithmException
     */

    public static void main(String[] args) throws NoSuchAlgorithmException {

         String originale="", shauno="",originaleshauno="",temp="";




















        //
        //
        //
        //LETTORE LINEA
        FileInputStream fis = null;
        BufferedReader reader = null;

        try {
            fis = new FileInputStream("/Users/niccolo/Desktop/hash/dizionario.txt");
            reader = new BufferedReader(new InputStreamReader(fis));

            System.out.println("Reading File line by line using BufferedReader");

            String line = reader.readLine();
            while(line != null){
                System.out.println(line);

                //MIO
                originale=line;
                shauno=sha1(originale);
                originaleshauno=originale+","+shauno;
                temp=temp+originaleshauno;

                //FINE MIO


                line = reader.readLine();

            }

        } catch (FileNotFoundException ex) {
            Logger.getLogger(BufferedReaderExample.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(BufferedReaderExample.class.getName()).log(Level.SEVERE, null, ex);

        } finally {
            try {
                reader.close();
                fis.close();
            } catch (IOException ex) {
                Logger.getLogger(BufferedReaderExample.class.getName()).log(Level.SEVERE, null, ex);
            }
        }









        //MIO CODICE








        //CREAZIONE FILE


                try{
            String verify, putData;
            File file = new File("file.txt");
            file.createNewFile();
            FileWriter fw = new FileWriter(file);
            BufferedWriter bw = new BufferedWriter(fw);

            bw.write(temp);

            bw.flush();
            bw.close();
            FileReader fr = new FileReader(file);
            BufferedReader br = new BufferedReader(fr);
            while( br.readLine() != null ){
                verify = br.readLine();
                if(verify != null){
                    putData = verify.replaceAll("here", "there");
                    bw.write(putData);
                }
            }
            br.close();


        }catch(IOException e){
        e.printStackTrace();
        }









    }


    //CONVERSIONE SHA1

    static String sha1(String input) throws NoSuchAlgorithmException {
        MessageDigest mDigest = MessageDigest.getInstance("SHA1");
        byte[] result = mDigest.digest(input.getBytes());
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < result.length; i++) {
            sb.append(Integer.toString((result[i] & 0xff) + 0x100, 16).substring(1));
        }
        return sb.toString();
    }
}