package BePro.Project_Example;

import java.io.*;
import java.lang.reflect.Array;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.*;

/**
 * Created by BeProEdu on 02.02.2019.
 */
public class Main {
    public static void main(String[] args) {

        Menu menu = new Menu();
        menu.start();

    }
}
class Hello12{
    public Hello12() throws IOException{
    }
}

class Number<T>{
    T a;
}

interface Walkable{
     int a = 10;

     void walk();
}

interface PushUp{
    int pushUpQuantity = 20;
    void pushUp();

    default void hello(){
        System.out.println("Hello");
    }

    static void pushUpCounter(){

    }
}

class User  {
    private String name;
    private String password;
    private String email;

    public User(String name, String password){
        setName(name);
        setPassword(password);
    }

    public void setName(String name){
        this.name = name;
    }

    public  String getName(){
        return name;
    }

    public void setPassword(String password){
        this.password = password;
    }

    public String getPassword(){
        return password;
    }

    public void setEmail(String email){
        this.email = email;
    }

    public String getEmail(){
        return email;
    }

}

class Menu{
    private File file;

    public Menu(){
        file = new File("users.txt");

        if(!file.exists()){
            try {
                file.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public void start(){
        Scanner scanner= new Scanner(System.in);
        int option;

        do{
            System.out.println("Menu");
            System.out.println("1.Sign In");
            System.out.println("2.Sign Up");
            System.out.println("3.Users");
            System.out.println("4.Exit");
            System.out.println("Choose one option: ");
            option = scanner.nextInt();

            switch(option){
                case 1:
                    signIn();
                    break;
                case 2:
                    signUp();
                    break;

                case 3:
                    allUsers();
                    break;
                case 4:
                    System.out.println("Bye");
                    break;
                default:
                    System.out.println("No option ");
            }

        }while(option !=4);
    }

    public boolean exists(String name){
        ArrayList<User> users = getUsers();


        for (int i = 0; i <users.size(); i++) {
            if(users.get(i).getName().equals(name)){
                return true;
            }
        }

        return false;
    }

    public void signUp(){
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter name: ");
        String name = scanner.next();

        if(exists(name)){
            System.out.println("User already exists");
            return;
        }
        System.out.println("Enter password: ");
        String password = scanner.next();
        System.out.println("Confirm password: ");
        String confirmPassword = scanner.next();

        if(password.equals(confirmPassword)){

            User user = new User(name, password);
            boolean result = writeUser(user);
            if(result){
                System.out.println("User registered");
            }else{
                System.out.println("Error");
            }

        }else{
            System.out.println("Error");
        }
    }

    public boolean writeUser(User user){
        try(BufferedWriter writer = new BufferedWriter(new FileWriter(this.file, true))){
            writer.write(user.getName());
            writer.newLine();
            writer.write(user.getPassword());
            writer.newLine();
            writer.write(user.getEmail()+" ");
            writer.newLine();
        }catch(IOException ex){
            System.out.println(ex.getMessage());
            return false;
        }

        return true;
    }

    public ArrayList<User> getUsers(){
        ArrayList<User> result  = new ArrayList<>();
        try(BufferedReader reader  = new BufferedReader(new FileReader(this.file))){
            String name;
            while((name = reader.readLine()) != null){
                String password = reader.readLine();
                User user = new User(name,password);
                user.setEmail(reader.readLine());
                result.add(user);
            }
        }catch(IOException ex){
            System.out.println(ex.getMessage());
        }

        return result;
    }

    public User getUser(String name){
        try(BufferedReader reader = new BufferedReader(new FileReader(this.file))){
            String line;

            while((line = reader.readLine()) != null){
                String password = reader.readLine();
                String email = reader.readLine();
                if(line.equals(name)){
                    User user = new User(line, password);
                    user.setEmail(email);
                    return user;
                }
            }
        }catch(IOException ex){
            System.out.println(ex.getMessage());
        }


        return null;
    }

    public void signIn(){
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter name: ");
        String name = scanner.next();
        System.out.println("Enter password: ");
        String password = scanner.next();


        User user = getUser(name);

        if(user == null){
            System.out.println("No user exists");
            return;
        }

        if(!user.getPassword().equals(password)){
            System.out.println("Error");
            return;
        }


        System.out.println("Information for "+user.getName());

        System.out.println("Password: "+user.getPassword());
        System.out.println("Email: "+user.getEmail());

        System.out.println("1.Edit");
        System.out.println("2.Delete");
        System.out.println("3.Menu");
        System.out.println("Choose one option: ");
        int option = scanner.nextInt();

        if(option == 1){
            edit(user);
        }else if(option == 2){
            delete(user);
        }
    }

    public void allUsers(){
        System.out.println("Users: ");
        ArrayList<User> users = getUsers();
        for (int i = 0; i <users.size() ; i++) {
            System.out.println(users.get(i).getName());
        }
        System.out.println();
    }

    public void edit(User user){
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter password or -1 to skip: ");
        String password = scanner.next();

        if(!password.equals("-1")){
            user.setPassword(password);
        }

        System.out.println("Enter email or -1 to skip: ");
        String email = scanner.next();
        if(!email.equals("-1")){
            user.setEmail(email);
        }

    }


    public void delete(User user){
       /* for (int i = 0; i <users.size(); i++) {
            if(users.get(i).getName().equals(user.getName())){
                users.remove(i);
                return;
            }
        }*/

    }
}

class DuplicateUserException extends Exception{

    public DuplicateUserException(){
        super("Users are duplicated");
    }
}

class Calculation {

    public Calculation(){
        System.out.println("Constructor has been used");
    }

    Calculation(int a){

    }

    public void showResult(){
        System.out.println("Result");
    }

    public int sum(int a, int b){
        return a+b;
    }
}