using System.Collections.Generic;
using Module.Log;
using UnityEditor;
using UnityEngine;

public class RemoveNormalCompress
{
    private readonly List<TextureImporter> _textureImporters;
    private int _index;

    private RemoveNormalCompress()
    {
        _textureImporters = new List<TextureImporter>();
        var allPaths = EditorCommonUtility.GetAllAssetPathsFromSelect();
        for (var i = 0; i < allPaths.Count; i++)
        {
            var path = allPaths[i];
            var importer = AssetImporter.GetAtPath(path) as TextureImporter;
            if (importer != null &&
                importer.normalmap &&
                (importer.mipmapEnabled ||
                 importer.compressionQuality < 100 ||
                 importer.textureFormat != TextureImporterFormat.ARGB32))
                _textureImporters.Add(importer);
        }
    }

    // 丢失动画的状态，会试图修复状态；动画名称不对应动画状态，会试图修改动画名称；
    [MenuItem("Assets/Normal/移除法线压缩")]
    public static void RemovAnimatoreTransitions()
    {
        var animatorFix = new RemoveNormalCompress();
        animatorFix.Start();
    }

    private void Start()
    {
        if (_textureImporters.Count > 0)
            EditorApplication.update = Update;
    }

    private void Stop()
    {
        EditorUtility.ClearProgressBar();
        EditorApplication.update = null;
        AssetDatabase.SaveAssets();
        AssetDatabase.Refresh();
        EditorUtility.UnloadUnusedAssetsImmediate(true);
    }

    private void Update()
    {
        // 每一帧处理一个State，使移动后的路径能够正常赋值
        if (_index > _textureImporters.Count - 1)
        {
            LogModule.WarningLog("******** 法线压缩全部解除 ********");
            Stop();
        }
        else
        {
            var importer = _textureImporters[_index];
            _index++;
            var cancel = EditorUtility.DisplayCancelableProgressBar("去除法线压缩", importer.assetPath,
                _index / (float) _textureImporters.Count);
            if (cancel)
                Stop();
            else
            {
                importer.mipmapEnabled = false;
                importer.compressionQuality = 100;
                importer.textureFormat = TextureImporterFormat.ARGB32;
                importer.SaveAndReimport();
            }
        }
    }
}