/* odd version with all static methods only
   !!! DO NOT WRITE CODE LIKE THAT !!!
*/

public class BankAccount {

  private int balance = 0;
  private int id = 0;

  public static int getBalance(BankAccount ba) {
    return ba.balance;
  }

  public static void deposit(BankAccount ba, int amount) {
    System.out.println("Depositing " + amount + "$ into account " + ba.id);
    ba.balance = ba.balance + amount;
  }

  public static void withdraw(BankAccount ba, int amount) {
    if (amount > ba.balance) {
      amount = ba.balance;
      System.out.println("No overdraft facility, will only withdraw " + amount + "$ from account " + ba.id);
    }
    System.out.println("Withdrawing " + amount + "$ from account " + ba.id);
    ba.balance = ba.balance - amount;

  }

  public static int transaction(BankAccount ba, int amount) {

    if (amount > 0)
      ba.deposit(amount);
    else
      ba.withdraw(-amount);
    
    return ba.balance;
  }

  public static String toString(BankAccount ba) {
    return "<Account " + ba.id + ": " + ba.balance + "$ in credit>";
  }


  private static int idCounter = 0;

  public BankAccount() {
    id = idCounter++;
    System.out.println("Created new account with Id = " + id);
  }

  public BankAccount(int initialBalance) {
    id = idCounter++;
    System.out.println("Created new account with Id = " + id);
    // HOW TO DO THAT ??? we will learn that later
    //transaction(initialBalance);
  }

}