package models;

public abstract class User {
    protected String username;
    protected String password;

    public User(String username, String password) {
        this.username = username;
        this.password = password;
    }

    public String getUsername() { return username; }

    public boolean checkPassword(String password) {
        return this.password.equals(password);
    }

    public static String validateUsername(String username) {
        if (username == null || username.trim().isEmpty()) {
            return "Username cannot be empty!";
        }
        if (username.length() < 3) {
            return "Username must be at least 3 characters!";
        }
        return null;
    }

    public static String validatePassword(String password) {
        if (password == null || password.length() < 4) {
            return "Password must be at least 4 characters!";
        }
        return null;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null || getClass() != obj.getClass()) return false;
        User user = (User) obj;
        return username.equalsIgnoreCase(user.username);
    }
}