using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace XHandler.Controls
{
    /// <summary>
    /// 按照步骤 1a 或 1b 操作，然后执行步骤 2 以在 XAML 文件中使用此自定义控件。
    ///
    /// 步骤 1a) 在当前项目中存在的 XAML 文件中使用该自定义控件。
    /// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根
    /// 元素中:
    ///
    ///     xmlns:MyNamespace="clr-namespace:HxUserManagement.Controls"
    ///
    ///
    /// 步骤 1b) 在其他项目中存在的 XAML 文件中使用该自定义控件。
    /// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根
    /// 元素中:
    ///
    ///     xmlns:MyNamespace="clr-namespace:HxUserManagement.Controls;assembly=HxUserManagement.Controls"
    ///
    /// 您还需要添加一个从 XAML 文件所在的项目到此项目的项目引用，
    /// 并重新生成以避免编译错误:
    ///
    ///     在解决方案资源管理器中右击目标项目，然后依次单击
    ///     “添加引用”->“项目”->[浏览查找并选择此项目]
    ///
    ///
    /// 步骤 2)
    /// 继续操作并在 XAML 文件中使用控件。
    ///
    ///     <MyNamespace:HxPasswordBox/>
    ///
    /// </summary>
    public class HxPasswordBox : Control
    {
        public event EventHandler PasswordChanged;
        static HxPasswordBox()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(HxPasswordBox), new FrameworkPropertyMetadata(typeof(HxPasswordBox)));
        }

        /// <summary>
        /// 密码
        /// </summary>
        public string Password
        {
            get => (string)GetValue(PasswordProperty);
            set => SetValue(PasswordProperty, value);
        }

        public static readonly DependencyProperty PasswordProperty =
           DependencyProperty.Register("Password", typeof(string), typeof(HxPasswordBox), new PropertyMetadata(null, OnPasswordChanged));

        public static void OnPasswordChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            HxPasswordBox control = (HxPasswordBox)d;
            if (control.GetTemplateChild("PART_PasswrodText") is TextBox txt && control.GetTemplateChild("PART_Password") is PasswordBox pb)
            {
                txt.Text = (string)control.GetValue(PasswordProperty);
                pb.Password = (string)control.GetValue(PasswordProperty);
            }
        }

        /// <summary>
        /// 水印
        /// </summary>
        public string WaterMark
        {
            get => (string)GetValue(WaterMarkProperty);
            set => SetValue(WaterMarkProperty, value);
        }

        public static readonly DependencyProperty WaterMarkProperty =
           DependencyProperty.Register("WaterMark", typeof(string), typeof(HxPasswordBox), new PropertyMetadata(null));


        /// <summary>
        /// 显示水印
        /// </summary>
        public bool ShowWaterMark
        {
            get => (bool)GetValue(ShowWaterMarkProperty);
            set => SetValue(ShowWaterMarkProperty, value);
        }

        public static readonly DependencyProperty ShowWaterMarkProperty =
           DependencyProperty.Register("ShowWaterMark", typeof(bool), typeof(HxPasswordBox), new PropertyMetadata(false));

        /// <summary>
        /// 存在文本内容
        /// </summary>
        public bool HasText
        {
            get => (bool)GetValue(HasTextProperty);
            set => SetValue(HasTextProperty, value);
        }

        public static readonly DependencyProperty HasTextProperty =
           DependencyProperty.Register("HasText", typeof(bool), typeof(HxPasswordBox), new PropertyMetadata(false));

        /// <summary>
        /// 密码字符
        /// </summary>
        public char PasswrodChar
        {
            get => (char)GetValue(PasswrodCharProperty);
            set => SetValue(PasswrodCharProperty, value);
        }

        public static readonly DependencyProperty PasswrodCharProperty =
           DependencyProperty.Register("PasswrodChar", typeof(char), typeof(HxPasswordBox), new PropertyMetadata('*'));

        private TextBox PART_PasswrodText { get; set; }
        private PasswordBox PART_Password { get; set; }


        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();
            PART_PasswrodText = GetTemplateChild("PART_PasswordText") as TextBox;
            PART_Password = GetTemplateChild("PART_Password") as PasswordBox;
            if(PART_PasswrodText!=null && PART_Password!=null)
            {
                PART_PasswrodText.TextChanged += PART_PasswrodText_TextChanged;
                PART_Password.PasswordChanged += PART_Password_PasswordChanged;
                PART_Password.Password = Password;
                HasText = !string.IsNullOrEmpty(Password);
            }
        }

        private void PART_Password_PasswordChanged(object sender, RoutedEventArgs e)
        {
            Password = PART_Password.Password;
            PART_PasswrodText.Text = Password;
            PART_Password.GetType().GetMethod("Select", BindingFlags.Instance | BindingFlags.NonPublic).Invoke(PART_Password, new object[] { PART_Password.Password.Length, 0 });
            PasswordChanged?.Invoke(this, EventArgs.Empty);

        }

        private void PART_PasswrodText_TextChanged(object sender, TextChangedEventArgs e)
        {
            Password= PART_PasswrodText.Text;
            PART_Password.Password = Password;
            HasText= !string.IsNullOrEmpty(Password);
            PasswordChanged?.Invoke(this, EventArgs.Empty);
        }
    }
}