using AutoRig.Formats.Gltf;
using AutoRig.Rig;

namespace AutoRig.Formats;

/// <summary>
/// Loads a rigged model to act as a transfer donor. glTF/GLB today; other rigged
/// formats can join behind the same facade.
/// </summary>
public static class DonorLoader
{
    /// <exception cref="FormatException">Unsupported format or unrigged file.</exception>
    public static DonorRig Load( byte[] data, string fileName )
    {
        ArgumentNullException.ThrowIfNull( data );
        ArgumentNullException.ThrowIfNull( fileName );

        var extension = Path.GetExtension( fileName ).ToLowerInvariant();
        return extension switch
        {
            ".glb" or ".gltf" => GltfDonorImporter.Import( data, fileName ),
            ".fbx" => Fbx.FbxDonorImporter.Import( data, fileName ),
            _ => throw new FormatException(
                $"'{fileName}': donors must be rigged glTF/GLB or FBX files; "
                + $"'{extension}' is not supported yet." ),
        };
    }
}