using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering;

public partial class RenderModule
{
    private readonly UniQuake uq;
    private readonly List<AliasModel> aliasModels = new List<AliasModel>();

    public RenderModule(UniQuake uniQuake)
    {
        uq = uniQuake;
        BuildCallbacks();
    }

    public override void Destroy()
    {
        base.Destroy();

        foreach (var aliasModel in aliasModels)
        {
            // aliasModel.Dispose();    // TODO: reactivate when done testing in editor
        }
        
        aliasModels.Clear();
    }

    private float xPos = -8f;

    private int UploadAliasModel(string name, QAliasHeader header, 
        QTriVertex[][] poseVertices, QTriangle[] triangles, QSTVert[] stVertices)
    {
        Debug.Log($"Alias model '{name}' with {header.numVerts} vertices, {header.numTriangles} triangles, {header.numFrames} frame(s)");

        string modelName = System.IO.Path.GetFileNameWithoutExtension(name);
        AliasModel aliasModel = new AliasModel(modelName);
        aliasModel.ImportMeshData(header, poseVertices, triangles, stVertices);
        aliasModels.Add(aliasModel);

        var go = new GameObject(modelName);
        go.transform.SetPositionAndRotation(new Vector3(xPos, 0, 0), Quaternion.Euler(-90, 90, 0));
        
        aliasModel.Animate(0, out Mesh mesh, out float blendWeight);

        if (header.numFrames > 1)
        {
            var mr = go.AddComponent<SkinnedMeshRenderer>();
            mr.material = new Material(Shader.Find("Universal Render Pipeline/Simple Lit"));
            mr.sharedMesh = mesh;
            mr.shadowCastingMode = ShadowCastingMode.Off;
            mr.receiveShadows = false;
            mr.lightProbeUsage = LightProbeUsage.Off;
            mr.reflectionProbeUsage = ReflectionProbeUsage.Off;
            
            var animator = go.AddComponent<AliasModelAnimator>();
            animator.aliasModel = aliasModel;
        }
        else
        {
            var mf = go.AddComponent<MeshFilter>();
            mf.sharedMesh = mesh;
            var mr = go.AddComponent<MeshRenderer>();
            mr.material = new Material(Shader.Find("Universal Render Pipeline/Simple Lit"));
            mr.shadowCastingMode = ShadowCastingMode.Off;
            mr.receiveShadows = false;
            mr.lightProbeUsage = LightProbeUsage.Off;
            mr.reflectionProbeUsage = ReflectionProbeUsage.Off;
        }

        xPos += 0.5f;
        return 1;
    }
    
    private int UploadBrushModel(QModel model)
    {
        if (model.type != QModelType.Brush)
            return -1;
        
        Debug.Log($"Brush model '{model.name}' with {model.numLeafs} leafs, {model.numVertices} vertices, {model.numSurfaces} surfaces");
        return 1;
    }
}