using System.Windows;

namespace HC_APTBS.Views.Dialogs
{
    /// <summary>
    /// Small input dialog that prompts for a username and password, or a password only.
    /// Used by <see cref="Views.Dialogs.UserManageDialog"/> when adding a new user or
    /// changing an existing user's password. Kept as a code-behind dialog (not MVVM)
    /// because it is a transient prompt with no shared state.
    /// </summary>
    public partial class UserPromptDialog : Window
    {
        /// <summary>Username entered by the operator. Empty when <see cref="UsernameVisible"/> is false.</summary>
        public string EnteredUsername { get; private set; } = string.Empty;

        /// <summary>Password entered by the operator.</summary>
        public string EnteredPassword { get; private set; } = string.Empty;

        /// <summary>
        /// Creates the dialog.
        /// </summary>
        /// <param name="title">Window title (already-localised string).</param>
        /// <param name="usernameVisible">
        /// True to show the username field (Add user flow); false to hide it (Change password flow).
        /// </param>
        /// <param name="prefillUsername">
        /// Pre-filled, read-only username shown as a label when <paramref name="usernameVisible"/> is false.
        /// Ignored otherwise.
        /// </param>
        public UserPromptDialog(string title, bool usernameVisible, string prefillUsername = "")
        {
            InitializeComponent();
            Title = title;

            if (usernameVisible)
            {
                EnteredUsername = string.Empty;
                TbUsername.Focus();
            }
            else
            {
                // Hide username row; reserve width so layout doesn't shift.
                LblUsername.Visibility = Visibility.Collapsed;
                TbUsername.Visibility = Visibility.Collapsed;
                EnteredUsername = prefillUsername;
                PbPassword.Focus();
            }
        }

        private void OnAccept(object sender, RoutedEventArgs e)
        {
            if (TbUsername.Visibility == Visibility.Visible)
                EnteredUsername = TbUsername.Text;
            EnteredPassword = PbPassword.Password;
            DialogResult = true;
            Close();
        }
    }
}