using System;
using System.IO;
using UnityEngine;
using VrmLib;
using UniVRM10;

public class Sample : MonoBehaviour
{
    [SerializeField]
    string m_vrmPath = "Tests/Models/Alicia_vrm-0.51/AliciaSolid_vrm-0.51.vrm";

    static UniVRM10.ModelAsset Import(byte[] bytes, FileInfo path)
    {
        var model = UniVRM10.VrmLoader.CreateVrmModel(bytes, path);

        // UniVRM-0.XXのコンポーネントを構築する
        var assets = UniVRM10.RuntimeUnityBuilder.ToUnityAsset(model, showMesh: false);

        // showRenderer = false のときに後で表示する例
        foreach (var renderer in assets.Renderers)
        {
            renderer.enabled = true;
        }

        UniVRM10.ComponentBuilder.Build10(model, assets);

        return assets;
    }

    // Start is called before the first frame update
    void OnEnable()
    {
        var src = new FileInfo(m_vrmPath);
        var vrm0x = Import(File.ReadAllBytes(m_vrmPath), src);

        // Export 1.0
        var exporter = new UniVRM10.RuntimeVrmConverter();
        var model = exporter.ToModelFrom10(vrm0x.Root);
        // 右手系に変換
        model.ConvertCoordinate(VrmLib.Coordinates.Vrm1);
        var exportedBytes = model.ToGlb();

        // Import 1.0
        var vrm10 = Import(exportedBytes, src);
        var pos = vrm10.Root.transform.position;
        pos.x += 1.5f;
        vrm10.Root.transform.position = pos;
        vrm10.Root.name = vrm10.Root.name + "_Imported_v1_0";

        // write
        var path = Path.GetFullPath("vrm10.vrm");
        Debug.Log($"write : {path}");
        File.WriteAllBytes(path, exportedBytes);
    }

    static void Printmatrices(Model model)
    {
        var matrices = model.Skins[0].InverseMatrices.GetSpan<System.Numerics.Matrix4x4>();
        var sb = new System.Text.StringBuilder();
        for (int i = 0; i < matrices.Length; ++i)
        {
            var m = matrices[i];
            sb.AppendLine($"#{i:00}[{m.M11:.00}, {m.M12:.00}, {m.M13:.00}, {m.M14:.00}][{m.M21:.00}, {m.M22:.00}, {m.M23:.00}, {m.M24:.00}][{m.M31:.00}, {m.M32:.00}, {m.M33:.00}, {m.M34:.00}][{m.M41:.00}, {m.M42:.00}, {m.M43:.00}, {m.M44:.00}]");
        }
        Debug.Log(sb.ToString());
    }
}