using System.Windows.Markup;

using WPFluent.Appearance;

namespace WPFluent.Markup;

/// <summary>
/// 提供一个字典实现，其中包含组件和其他设备使用的 <c>WPF UI</c> 主题资源。
/// elements of a WPF application.
/// </summary>
/// <example>
/// <code lang="xml"> 
/// &lt;Application 
/// xmlns:ui="http://schemas.lepo.co/wpfui/2022/xaml"&gt;
/// &lt;Application.Resources&gt;
/// &lt;ResourceDictionary&gt;
/// &lt;ResourceDictionary.MergedDictionaries&gt;
/// &lt;ui:ThemesDictionary Theme = "Dark" /&gt;
/// &lt;/ResourceDictionary.MergedDictionaries&gt; 
/// &lt;/ResourceDictionary&gt;
/// &lt;/Application.Resources&gt;
/// &lt;/Application&gt;
/// </code>
/// </example>
[Localizability(LocalizationCategory.Ignore)]
[Ambient]
[UsableDuringInitialization(true)]
public class ThemesDictionary : ResourceDictionary
{
    public ThemesDictionary() { SetSourceBasedOnSelectedTheme(ThemeType.Light); }

    private void SetSourceBasedOnSelectedTheme(ThemeType? selectedApplicationTheme)
    {
        var themeName = selectedApplicationTheme switch
        {
            ThemeType.Light => "Light",
            ThemeType.Dark => "Dark",
            ThemeType.HcWhite => "HCWhite",
            ThemeType.HcBlack => "HCBlack",
            _ => "Light",
        };

        Source = new Uri($"{ThemeManager.ThemesDictionaryPath}{themeName}.xaml", UriKind.Absolute);
    }

    /// <summary>
    /// Sets the default application theme.
    /// </summary>
    public ThemeType Theme { set => SetSourceBasedOnSelectedTheme(value); }
}