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

namespace BF
{
    public class DreamlandInstancingHelper : MonoBehaviour
    {
        Action luaUpdateAction;
        MaterialPropertyBlock block;
        MeshFilter meshFilter;
        List<Matrix4x4> materixList = new List<Matrix4x4>();
        List<Vector4> lightmapOffsetList = new List<Vector4>();

        void Awake()
        {
            block = new MaterialPropertyBlock();
        }

        public void SetLuaUpdateAction(Action updateAction)
        {
            luaUpdateAction = updateAction;
        }

        public void ClearLuaUpdateAction()
        {
            luaUpdateAction = null;
        }

        public MaterialPropertyBlock GetMaterialPorpertyBlock()
        {
            return block;
        }

        public MeshFilter GetMeshFilter()
        {
            meshFilter = GetComponentInChildren<MeshFilter>();
            return meshFilter;
        }

        public Vector4[] CollectLightmapOffsetArray()
        {
            lightmapOffsetList.Clear();
            var meshRenderers = GetComponentsInChildren<MeshRenderer>();
            foreach (var mr in meshRenderers)
            {
                lightmapOffsetList.Add(mr.lightmapScaleOffset);
            }
            return lightmapOffsetList.ToArray();
        }

        public List<Matrix4x4> CollectMaterixList()
        {
            materixList.Clear();
            var meshRenderers = GetComponentsInChildren<MeshRenderer>();
            foreach (var mr in meshRenderers)
            {
                materixList.Add(mr.localToWorldMatrix);
            }
            return materixList;
        }

        public void HideChild()
        {
            for (var i = 0; i < transform.childCount; i++)
            {
                transform.GetChild(i).gameObject.SetActive(false);
            }
        }

        void Update()
        {
            luaUpdateAction?.Invoke();
        }

        public static bool GetSupportInstancing()
        {
            return SystemInfo.supportsInstancing;
        }
    }
}