package fileserver.client;

import fileserver.util.Misc;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.security.NoSuchAlgorithmException;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Account {

    public String username;
    public String password;
    public List<String> fileNames;

    //Credentials are assumed to be correct at this stage, NO DOUBLE CHECKING
    public Account(String username, String password) {
        this.username = username;
        this.password = password;
        load(username, password);
    }

    private void load(String username, String password) {
        File file = new File("./" + username + "/files/");
        File[] files = file.listFiles();
        for (File f : files) {
            if (file.isFile()) {
                fileNames.add(f.getName());
            }
        }
    }

    public static void create(String username, String password) {
        File file = new File("./" + username + ".txt");
        File fileTwo = new File("./" + username + "/files/");
        try {
            file.createNewFile();
            fileTwo.createNewFile();
            FileOutputStream fos = new FileOutputStream(file);
            DataOutputStream dos = new DataOutputStream(fos);
            try {
                dos.writeUTF(Misc.hash(password));
            } catch (NoSuchAlgorithmException ex) {
                Logger.getLogger(Account.class.getName()).log(Level.SEVERE, null, ex);
            }
            dos.flush();
            dos.close();
            fos.close();
        } catch (IOException ex) {
            Logger.getLogger(Account.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public static boolean canCreate(String username) {
        if (!new File("./" + username + ".txt").exists()) {
            return true;
        }
        return false;
    }

    public static boolean credentialsCheck(String username, String password) throws NoSuchAlgorithmException {
        File fi = new File("./" + username + ".txt");
        if (fi.exists()) {
            try {
                DataInputStream dis = new DataInputStream(new FileInputStream(fi));
                String passwordHash = Misc.hash(password);
                String passHash = dis.readUTF();
                if (passwordHash.equals(passHash)) {
                    return true;
                }
            } catch (FileNotFoundException ex) {
                Logger.getLogger(Account.class.getName()).log(Level.SEVERE, null, ex);
                return true;
            } catch (IOException ex) {
                Logger.getLogger(Account.class.getName()).log(Level.SEVERE, null, ex);
                return false;
            }
        }
        return false;
    }
    /*
     * User txt files will just have password.
     * Files will be stored at "./username/files/"
     */
}