using AssetRipper.SourceGenerated.Classes.ClassID_128;
using AssetRipper.SourceGenerated.Classes.ClassID_21;
using AssetRipper.SourceGenerated.Classes.ClassID_27;
using AssetRipper.SourceGenerated.Enums;
using System.Buffers.Binary;

namespace AssetRipper.SourceGenerated.Extensions;

public static class FontExtensions
{
	public static FontStyle GetDefaultStyle(this IFont font)
	{
		return (FontStyle)font.DefaultStyle;
	}

	public static FontRenderingMode GetFontRenderingMode(this IFont font)
	{
		return (FontRenderingMode)font.FontRenderingMode;
	}

	/// <summary>
	/// Font Material is an automatically generated material for each font.
	/// </summary>
	/// <param name="font"></param>
	/// <param name="fontMaterial"></param>
	/// <returns></returns>
	public static bool TryGetFontMaterial(this IFont font, [NotNullWhen(true)] out IMaterial? fontMaterial)
	{
		if (font.DefaultMaterialP is { Name.String: "Font Material" } material)
		{
			fontMaterial = material;
			return true;
		}
		else
		{
			fontMaterial = null;
			return false;
		}
	}

	/// <summary>
	/// Font Texture is an automatically generated texture for each font.
	/// </summary>
	/// <param name="font"></param>
	/// <param name="fontTexture"></param>
	/// <returns></returns>
	public static bool TryGetFontTexture(this IFont font, [NotNullWhen(true)] out ITexture? fontTexture)
	{
		if (font.TextureP is { Name.String: "Font Texture" } texture)
		{
			fontTexture = texture;
			return true;
		}
		else
		{
			fontTexture = null;
			return false;
		}
	}

	public static string GetFontExtension(this IFont font)
	{
		byte[] fontData = font.FontData;
		if (fontData.Length < 4)
		{
			return "ttf";// just in case
		}
		uint type = BinaryPrimitives.ReadUInt32LittleEndian(fontData);
		return type == OttoAsciiFourCC ? "otf" : "ttf";
	}

	/// <summary>
	/// OTTO ascii
	/// </summary>
	private const int OttoAsciiFourCC = 0x4F54544F;
}