package auth.system;

/**
 *
 * @author Patrick
 */
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;


public class AuthSystem {

    /**
     * @param args the command line arguments
     * @throws java.io.FileNotFoundException
     */
    public static void main(String[] args) throws FileNotFoundException, IOException {
        Scanner input = new Scanner(System.in);
        int attempts = 0;
        String username = "";
        String password = "";
        FileInputStream fileByteStream = null;
        Scanner inFS = null;
        String credString;
        //String role = "";


        while (attempts < 3){
            try {
                System.out.println("Enter Username: ");
                username = input.nextLine();
                if(username.contains("exit")){
                    return;
                }
                System.out.println("Enter Password: ");
                password = input.nextLine();
                fileByteStream = new FileInputStream("creds.txt.text");
                inFS = new Scanner(fileByteStream);
                credString = "blank";



                String original = password;
                MessageDigest md = MessageDigest.getInstance("MD5");
                md.update(original.getBytes());
                byte[] digest = md.digest();
                StringBuffer sb = new StringBuffer();
                for (byte b : digest) {
                    sb.append(String.format("%02x", b & 0xff));
                }



                while(inFS.hasNextLine()){

                if(attempts >= 3){
                    System.out.print("Login failure limit reached. Please contact an administrator to unlock your account.");
                    return;
                    }
                credString = inFS.nextLine();
                String arr[] = credString.split("\t", 0);
                //System.out.println(arr[4]);
                //role = arr[4];

                if(credString.contains(username)){

                    if (credString.contains(sb.toString())){
                        System.out.println(" Login Successful");
                        String role = arr[4];
                        System.out.println(role);

                        break;

                    }}
                }


                if (!credString.contains(username)) {
                    System.out.println("Login Failure");
                    attempts = attempts +1;
                    System.out.println("Failed attempts(max 3): " + attempts);

                    }





            } catch (NoSuchAlgorithmException ex) {
                Logger.getLogger(AuthSystem.class.getName()).log(Level.SEVERE, null, ex);
            }


        }

    }

}