using System.Windows;
using System.Windows.Controls;

namespace WpfAppTest.Controls // 根据您的项目命名空间修改
{
    public static class PasswordBoxHelper
    {
        public static readonly DependencyProperty HasPasswordProperty =
            DependencyProperty.RegisterAttached(
                "HasPassword",
                typeof(bool),
                typeof(PasswordBoxHelper),
                new FrameworkPropertyMetadata(false, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault));

        public static bool GetHasPassword(DependencyObject dp)
        {
            return (bool)dp.GetValue(HasPasswordProperty);
        }

        public static void SetHasPassword(DependencyObject dp, bool value)
        {
            dp.SetValue(HasPasswordProperty, value);
        }

        public static readonly DependencyProperty MonitorPasswordProperty =
            DependencyProperty.RegisterAttached(
                "MonitorPassword",
                typeof(bool),
                typeof(PasswordBoxHelper),
                new UIPropertyMetadata(false, OnMonitorPasswordChanged));

        public static bool GetMonitorPassword(DependencyObject dp)
        {
            return (bool)dp.GetValue(MonitorPasswordProperty);
        }

        public static void SetMonitorPassword(DependencyObject dp, bool value)
        {
            dp.SetValue(MonitorPasswordProperty, value);
        }

        private static void OnMonitorPasswordChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            if (d is PasswordBox passwordBox)
            {
                if ((bool)e.NewValue)
                {
                    passwordBox.PasswordChanged += PasswordBox_PasswordChanged;
                    UpdateHasPassword(passwordBox); // Initial check
                }
                else
                {
                    passwordBox.PasswordChanged -= PasswordBox_PasswordChanged;
                }
            }
        }

        private static void PasswordBox_PasswordChanged(object sender, RoutedEventArgs e)
        {
            if (sender is PasswordBox passwordBox)
            {
                UpdateHasPassword(passwordBox);
            }
        }

        private static void UpdateHasPassword(PasswordBox passwordBox)
        {
            SetHasPassword(passwordBox, passwordBox.Password.Length > 0);
        }
    }
}