Skinning System

public interface ISkin
{
    Drawable? GetDrawableComponent(ISkinComponentLookup lookup);
    Texture? GetTexture(string componentName);
    Texture? GetTexture(string componentName, WrapMode wrapModeS, WrapMode wrapModeT);
    ISample? GetSample(ISampleInfo sampleInfo);
    IBindable<TValue>? GetConfig<TLookup, TValue>(TLookup lookup);
}

public class SkinManager : ModelManager<SkinInfo>, ISkinSource, IModelImporter<SkinInfo>
{
    public readonly Bindable<Skin> CurrentSkin = new Bindable<Skin>();
    public readonly Bindable<Live<SkinInfo>> CurrentSkinInfo;
    public Skin DefaultClassicSkin { get; }
}

public IList<Live<SkinInfo>> GetAllUsableSkins()
{
    // Returns:
    // 1. Default skins (Argon, Triangles, Classic, etc.)
    // 2. Random skin option
    // 3. User skins (alphabetically)
}

// Import from file paths
await skinManager.Import("path/to/skin.osk");

// Import with progress tracking
await skinManager.Import(notification, tasks, parameters);

// Export current skin
await skinManager.ExportCurrentSkin();

// Export specific skin
await skinManager.ExportSkin(skinInfo);

public bool EnsureMutableSkin()
{
    // If current skin is protected, creates a copy
    // Returns true if a new skin was created
}

public bool Save(Skin skin)
{
    // Serializes skin changes to JSON
    // Returns true if changes were made
}

public Task<ExternalEditOperation<SkinInfo>> BeginExternalEditing(SkinInfo skin)
{
    // Exports skin to temporary location for editing
    // Watches for changes and re-imports when done
}

public Drawable GetDrawableComponent(ISkinComponentLookup lookup) => 
    lookupWithFallback(s => s.GetDrawableComponent(lookup));

public Texture GetTexture(string componentName, WrapMode wrapModeS, WrapMode wrapModeT) => 
    lookupWithFallback(s => s.GetTexture(componentName, wrapModeS, wrapModeT));

public class GlobalSkinColours
{
    public static readonly Color4 Blue = Color4Extensions.FromHex("#1188ee");
    public static readonly Color4 Pink = Color4Extensions.FromHex("#ee11dd");
    public static readonly Color4 Purple = Color4Extensions.FromHex("#aa11ee");
    // ... more colors
}

public class BeatmapSkinProvidingContainer : SkinProvidingContainer
{
    // Provides beatmap-specific skin resources
    // Falls back to user skin if resource not found
}

// Delete with filter
skinManager.Delete(s => s.Name.Contains("old"));

// Delete specific skins
skinManager.Delete(new[] { skinInfo }, silent: false);

skinManager.Rename(skinInfo, "New Name");