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

#if UNITY_EDITOR
using UnityEditor;
[CustomEditor(typeof(OptimizeMesh))]
public class LevelScriptEditor : Editor
{
    public override void OnInspectorGUI()
    {
        DrawDefaultInspector();
        OptimizeMesh myTarget = (OptimizeMesh)target;

        if (GUILayout.Button("Optimize Mesh!"))
        {
            myTarget.DecimateMesh();
        }

        if (GUILayout.Button("Save Mesh!"))
        {
            myTarget.SaveMesh();
        }

    }
}
#endif
[ExecuteInEditMode]
public class OptimizeMesh : MonoBehaviour
{
    [Range(0.0f, 1.0f)]
    [SerializeField] float _quality = 0.5f;
    MeshFilter _renderer;
    Mesh _mesh;
    bool existMesh;
    string meshName;

    public void Start()
    {
        _renderer = GetComponent<MeshFilter>();
        _mesh = _renderer.sharedMesh;

        int index = _mesh.name.IndexOf(" (", System.StringComparison.OrdinalIgnoreCase);
        if (index > 0)
            meshName = _mesh.name.Substring(0, index);
        else
            meshName = _mesh.name;
    }

    public void Set_Quality(float _q) { _quality = _q; }

#if UNITY_EDITOR
    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.O))
        {
            DecimateMesh();
        }
    }

    public void DecimateMesh()
    {
        if (!EditorApplication.isPlaying)
        {
            var meshSimplifier = new UnityMeshSimplifier.MeshSimplifier();
            meshSimplifier.Initialize(_mesh);
            meshSimplifier.SimplifyMesh(_quality);
            var destMesh = meshSimplifier.ToMesh();
            _renderer.sharedMesh = destMesh;

            var meshcollider = GetComponent<MeshCollider>();
            if (meshcollider)
            {
                meshcollider.sharedMesh = destMesh;
                meshcollider.convex = true;
            }
        }
    }
    public void DecimateMesh_byPath()
    {
        if (!EditorApplication.isPlaying)
        {
            var destMesh = AssetDatabase.LoadAssetAtPath<Mesh>("Assets/ResWork/Optimized/Optimized__" + meshName + ".asset");

            if (destMesh != null)
            {
                existMesh = true;
                _renderer.sharedMesh = destMesh;
            }
            else
            {
                var meshSimplifier = new UnityMeshSimplifier.MeshSimplifier();
                meshSimplifier.Initialize(_mesh);
                meshSimplifier.SimplifyMesh(_quality);
                destMesh = meshSimplifier.ToMesh();
                _renderer.sharedMesh = destMesh;
            }

            var meshcollider = GetComponent<MeshCollider>();
            if (meshcollider)
            {
                meshcollider.sharedMesh = destMesh;
                meshcollider.convex = true;
            }
        }
    }

    public void SaveMesh()
    {
        if (!EditorApplication.isPlaying)
        {
            MeshSaverEditor.SaveMesh(_renderer.sharedMesh, "Optimized__" + meshName, false, true);
        }
    }

    public void SaveMesh(string path)
    {
        if (!EditorApplication.isPlaying)
        {
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }

            if (!existMesh)
                MeshSaverEditor.SaveMesh_WithPath(_renderer.sharedMesh, path + "Optimized__" + meshName + ".asset", false, true);
        }
    }
#endif
}