using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Media;

namespace WpfAppTest
{
    internal class RebarTextBlock : TextBlock
    {
        public static readonly DependencyProperty RebarTextProperty =
        DependencyProperty.Register(
            nameof(RebarText),
            typeof(string),
            typeof(WpfAppTest.RebarTextBlock),
            new PropertyMetadata(string.Empty, OnRebarTextChanged));

        public string RebarText
        {
            get => (string)GetValue(RebarTextProperty);
            set => SetValue(RebarTextProperty, value);
        }

        private static void OnRebarTextChanged(
            DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            ((WpfAppTest.RebarTextBlock)d).BuildInlines(e.NewValue as string);
        }
        //{Assembly.GetExecutingAssembly().GetName()}
        internal static readonly FontFamily RebarFont = new($"pack://application:,,,/WpfAppTest;component/Fonts/#SJQY");
        internal static readonly FontFamily NormalFont = new($"pack://application:,,,/WpfAppTest;component/Fonts/#汉仪粗宋简");
        private void BuildInlines(string text)
        {
            var sjqy = (FontFamily)Application.Current.Resources["SJQY"];
            Inlines.Clear();
            if (string.IsNullOrEmpty(text)) return;
            var regex = new Regex(
                 @"(?<![A-Za-z])([ABCD])(?=\s*(?:[ØΦ]\d|\d+@\d+))",
                 RegexOptions.Compiled);

            int lastIndex = 0;

            foreach (Match match in regex.Matches(text))
            {
                // 普通文本
                if (match.Index > lastIndex)
                {
                    this.Inlines.Add(new Run
                    {
                        Text = text.Substring(lastIndex, match.Index - lastIndex),
                        FontFamily = NormalFont
                    });
                }

                // 钢筋等级（SJQY）
                this.Inlines.Add(new Run
                {
                    Text = match.Value,
                    FontFamily = sjqy
                });

                lastIndex = match.Index + match.Length;
            }

            // 尾部普通文本
            if (lastIndex < text.Length)
            {
                this.Inlines.Add(new Run
                {
                    Text = text.Substring(lastIndex),
                });
            }
        }
    }
}