//https://stackoverflow.com/questions/35324285/how-to-create-masked-textbox-like-windows-ip-address-fields

using System;
using System.Collections.Generic;
using System.IO;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;



namespace DTS.Common.Controls
{
    /// <summary>
    /// Interaction logic for IPTextBox.xaml
    /// </summary>
    public partial class TestIDTextBox : UserControl
    {
        private static readonly List<Key> OtherAllowedKeys = new List<Key> { Key.Delete };
        
        private bool _suppressAddressUpdate = false;

        public TestIDTextBox()
        {
            InitializeComponent();
        }

        //FB 43400 added Clear method to reset the segments
        public void Clear()
        {
            tbTestId.Text = string.Empty;
        }

        public static readonly DependencyProperty TextProperty = DependencyProperty.Register(
            "Text", typeof(string), typeof(TestIDTextBox), new FrameworkPropertyMetadata(default(string), TextChanged)
            {
                BindsTwoWayByDefault = true
            });

        private static void TextChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
        {
            var tb = dependencyObject as TestIDTextBox;
            var text = e.NewValue as string;

            if (text != null && tb != null)
            {
                tb._suppressAddressUpdate = true;

                if (IsValidText(text))
                {
                    tb.tbTestId.Text = text;
                }
                else
                {
                    tb.tbTestId.Text = (string)e.OldValue;
                }
                tb._suppressAddressUpdate = false;
            }
        }

        public string Text
        {
            get { return (string)GetValue(TextProperty); }
            set { SetValue(TextProperty, value); }
        }

        
        private static bool IsValidText(string text)
        {
            var invalidChars = new List<char>();
            invalidChars.AddRange(Path.GetInvalidFileNameChars());
            invalidChars.AddRange(Path.GetInvalidPathChars());
            invalidChars.Add('.');
            var charArray = text.ToCharArray();
            return !Array.Exists(charArray, x => invalidChars.Contains(x));
        }

        private void tbTestId_PreviewTextInput(object sender, TextCompositionEventArgs e)
        {
            e.Handled = !IsValidText(e.Text);
        }

        private void TextBoxBase_OnTextChanged(object sender, TextChangedEventArgs e)
        {
            if ( !(sender is TextBox tb)) { return; }
            e.Handled = !IsValidText(tb.Text);
        }
    }
}