using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace VariaStudioTest
{
    public partial class ColorPaletteControl : UserControl
    {
        public List<ResourceItem> ColorResources { get; set; }
        public List<ResourceItem> BrushResources { get; set; }

        public static readonly DependencyProperty SourceUriProperty =
             DependencyProperty.Register(nameof(SourceUri), typeof(string), typeof(ColorPaletteControl), new PropertyMetadata(null, OnSourceUriChanged));

        public string SourceUri
        {
            get { return (string)GetValue(SourceUriProperty); }
            set { SetValue(SourceUriProperty, value); }
        }

        private static void OnSourceUriChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            ColorPaletteControl control = (ColorPaletteControl)d;
            string uriString = (string)e.NewValue;

            if (!string.IsNullOrEmpty(uriString))
            {
                control.LoadResources(new Uri(uriString, UriKind.RelativeOrAbsolute));
            }
        }
        private void LoadResources(Uri uri)
        {
            var resourceDictionary = new ResourceDictionary
            {
                Source = uri
            };

            ColorResources.Clear();
            BrushResources.Clear();

            foreach (DictionaryEntry entry in resourceDictionary)
            {
                string key = entry.Key.ToString();
                // 用正则分割驼峰或 Pascal 命名，取第一个单词
                var match = Regex.Match(key, @"^[A-Z][a-z]*");
                string prefix = match.Success ? match.Value : key;
                if (entry.Value is Color color)
                {
                    ColorResources.Add(new ResourceItem { Key = entry.Key.ToString(), Prefix = prefix, Value = new SolidColorBrush(color) });
                }
                else if (entry.Value is SolidColorBrush brush)
                {
                    BrushResources.Add(new ResourceItem { Key = key, Value = brush, Prefix = prefix });
                }
            }
            ColorResources = ColorResources.OrderBy(c => c.Key).ToList();
            BrushResources = BrushResources.OrderBy(c => c.Key).ToList();
            DataContext = this;
        }
        public ColorPaletteControl()
        {
            InitializeComponent();
            ColorResources = new List<ResourceItem>();
            BrushResources = new List<ResourceItem>();
        }

        public IEnumerable<IGrouping<string, ResourceItem>> GroupedBrushResources
        {
            get
            {
                return BrushResources.GroupBy(b => b.Prefix);
            }
        }

        public class ResourceItem
        {
            public string Key { get; set; }
            public SolidColorBrush Value { get; set; }
            public string Prefix { get; set; }
        }
    }
}