using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace SHH.CameraDashboard
{
    public enum ThemeType { Dark, Light }

    public static class ThemeManager
    {
        public static void ChangeTheme(ThemeType theme)
        { 
            var appResources = Application.Current.Resources;

            // 1. 找到旧的颜色字典并移除
            // 我们通过检查 Source 路径来识别它
            ResourceDictionary oldDict = null;
            foreach (var dict in appResources.MergedDictionaries)
            {
                // 只要路径里包含 "Colors." 说明它是我们的皮肤文件
                if (dict.Source != null && dict.Source.OriginalString.Contains("Themes/Colors."))
                {
                    oldDict = dict;
                    break;
                }
            }

            if (oldDict != null)
            {
                appResources.MergedDictionaries.Remove(oldDict);
            }

            // 2. 加载新字典
            string dictName = theme switch
            {
                ThemeType.Light => "/Style/Themes/Colors.Light.xaml",
                ThemeType.Dark => "/Style/Themes/Colors.Dark.xaml",
                _ => "/Style/Themes/Colors.Dark.xaml" // 默认
            };

            var newDict = new ResourceDictionary
            {
                Source = new Uri(dictName, UriKind.Relative)
            };

            // 3. 添加到集合中 (建议加在最前面，或者根据索引位置)
            appResources.MergedDictionaries.Add(newDict);
        }
    }
}