using System;
using UnityEngine;

namespace everlaster
{
    sealed class LogPolygonCounts : MVRScript
    {
        public override bool ShouldIgnore() => false;

        public override void Init()
        {
            try
            {
                var dazMeshes = containingAtom.GetComponentsInChildren<DAZMesh>();
                if(dazMeshes.Length > 0)
                {
                    SuperController.LogMessage("=== DAZMeshes ===");
                    foreach(var dazMesh in dazMeshes)
                    {
                        LogCount(dazMesh.name, GetPolygonCount(dazMesh.baseMesh));
                    }
                }

                var meshRenderers = containingAtom.GetComponentsInChildren<MeshRenderer>();
                if(meshRenderers.Length > 0)
                {
                    SuperController.LogMessage("=== MeshRenderers ===");
                    foreach(var meshRenderer in meshRenderers)
                    {
                        LogCount(meshRenderer.name, GetPolygonCount(meshRenderer.GetComponent<MeshFilter>()?.sharedMesh));
                    }
                }

            }
            catch(Exception e)
            {
                SuperController.LogError(e.ToString());
            }
        }

        void LogCount(string meshName, int count)
        {
            SuperController.LogMessage($"{containingAtom.name}/{meshName} polygon count: {(count == -1 ? "N/A (mesh is null)" : count.ToString())}");
        }

        // Each polygon is a triangle, thus every 3 indices represent a single polygon
        static int GetPolygonCount(Mesh mesh)
        {
            if(mesh == null) return -1;
            int[] triangles = mesh.triangles;
            int polygonCount = triangles.Length / 3;
            return polygonCount;
        }
    }
}