using LibationFileManager;
using System;

namespace LibationUiBase;

public static class BaseUtil
{
	/// <summary>A delegate that loads image bytes into the the UI framework's image format.</summary>
	public static Func<byte[]?, PictureSize, object?> LoadImage => s_LoadImage ?? DefaultLoadImageImpl;

	/// <summary>A delegate that loads a named resource into the the UI framework's image format.</summary>
	public static Func<string, object?> LoadResourceImage => s_LoadResourceImage ?? DefaultLoadResourceImageImpl;

	public static void SetLoadImageDelegate(Func<byte[]?, PictureSize, object?> tryLoadImage)
		=> s_LoadImage = tryLoadImage;
	public static void SetLoadResourceImageDelegate(Func<string, object?> tryLoadResourceImage)
		=> s_LoadResourceImage = tryLoadResourceImage;

	private static Func<byte[]?, PictureSize, object?>? s_LoadImage;
	private static Func<string, object?>? s_LoadResourceImage;

	private static object? DefaultLoadImageImpl(byte[]? imageBytes, PictureSize size)
	{
		Serilog.Log.Error("{LoadImage} called without a delegate set. Picture size: {PictureSize}", nameof(LoadImage), size);
		return null;
	}

	private static object? DefaultLoadResourceImageImpl(string resourceName)
	{
		Serilog.Log.Error("{LoadResourceImage} called without a delegate set. Resource name: {ResourceName}", nameof(LoadResourceImage), resourceName);
		return null;
	}
}