Untitled

import javax.sound.midi.Soundbank;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Scanner;

public class Main {
    static ArrayList<user> users = new ArrayList<>();

    public static ArrayList<String> splitaval(String a) {
        ArrayList<String> javab = new ArrayList<>();
        for (int i = 0; i < a.length(); i++) {
            if (a.charAt(i) == ' ') {
                javab.add(a.substring(0, i));
                javab.add(a.substring(i + 1, a.length() - 1));
            }
        }
        return javab;
    }


    public static void signup(String a) {
        a = a.substring(7, a.length());
        String name = splitaval(a).get(0);
        String password = splitaval(a).get(1);
        user newuser = new user(name, password, 0.0);
        users.add(newuser);
    }

    public static int checklogin(String a, String b) {
        for (int i = 0; i < users.size(); i++) {
            if (users.get(i).name.equals(a)) {
                if (users.get(i).password.equals(b)) {
                    return i;
                }
                return -1;
            }
        }
        return -2;
    }

    public static void login(int userlocate){
        user activeuser = users.get(userlocate);
        Scanner scan = new Scanner(System.in);
        while (true) {
            String a = scan.nextLine();
            if (a.equals("1")) {
                System.out.println(activeuser.balance);
            }
            if (a.equals("2")) {
                if (activeuser.history.size() == 0) {
                    System.out.println("No History");
                    continue;
                }
                ArrayList<tara> mova = activeuser.history;
                for (int i = 0; i < mova.size(); i++) {
                    tara taramova = mova.get(i);
                    if (taramova.type.equals("deposit")) {
                        System.out.println("deposit" + ':' + ' ' + taramova.balance + " by " + taramova.first + " in " + '(' + taramova.date + ')');
                    } else if (taramova.type.equals("withdraw")) {
                        System.out.println("withdraw" + ':' + ' ' + taramova.balance + " in " + '(' + taramova.date + ')');
                    } else if (taramova.type.equals("transfer")) {
                        System.out.println("transfer" + ':' + ' ' + taramova.balance + "to" + taramova.first + " in " + '(' + taramova.date + ')');
                    }
                }
            }
            if (a.equals("3")) {
                System.out.println("Amount?");
                double v = scan.nextInt();
                scan.nextLine();
                activeuser.balance = activeuser.balance + v;
                tara newtara = new tara("deposit", v, "System");
                activeuser.history.add(newtara);
                users.set(userlocate, activeuser);
            }
            if (a.equals("4")) {
                System.out.println("Amount?");
                double v = scan.nextInt();
                scan.nextLine();
                if (activeuser.balance < v) {
                    System.out.println("Not enough balance");
                    continue;
                }
                activeuser.balance = activeuser.balance - v;
                tara newtara = new tara("withdraw", -v, "System");
                activeuser.history.add(newtara);
                users.set(userlocate, activeuser);
            }
            if (a.equals("5")) {
                System.out.println("Your target username?");
                String a5 = scan.nextLine();
                if (finduserlocation(a5) == -1) {
                    System.out.println("This account does not exist.");
                    continue;
                }
                user activeuser2 = users.get(finduserlocation(a5));
                System.out.println("Amount?");
                double v5 = scan.nextInt();
                scan.nextLine();
                if (activeuser.balance < v5) {
                    System.out.println("Not enough balance");
                    continue;
                }
                activeuser.balance = activeuser.balance - v5;
                activeuser2.balance = activeuser2.balance + v5;
                tara newtara5 = new tara("transfer", -v5, a5);
                tara newtara52 = new tara("deposit", v5, activeuser.name);
                activeuser.history.add(newtara5);
                activeuser2.history.add(newtara52);
                users.set(userlocate, activeuser);
                users.set(finduserlocation(a5), activeuser2);
            }
            if (a.equals("6")) break;
            else System.out.println("Wrong command");
        }
    }

    public static int finduserlocation(String a) {
        for (int i = 0; i < users.size(); i++) {
            if (users.get(i).name.equals(a)) {
                return i;
            }
        }
        return -1;
    }


    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        while (true) {
            String a = scan.nextLine();
            String b = a.substring(0, 5);
            String c = a.substring(0, 6);
            if (c.equals("signup")) {
                signup(a);
                continue;
            }
            if (b.equals("login")) {
                a = a.substring(6, a.length());
                String name = splitaval(a).get(0);
                String password = splitaval(a).get(1);
                if (checklogin(name, password) == -1) {
                    System.out.println("wrong password");
                }
                else if (checklogin(name, password) == -2) {
                    System.out.println("wrong username");
                }
                else {
                    int userlocate = checklogin(name, password);
                    login(userlocate);
                }
            }
        }
    }
}