using System.IO;
using UnityEditor;
using UnityEngine;

public class AutoSetTextureUISprite : AssetPostprocessor
{
    void OnPreprocessTexture()
    {
        //自动设置类型
        if (assetPath.Contains("FGui"))
        {
            //fgui的图片资源需要设置为Sprite和不生成Mip Maps
            TextureImporter textureImporter = (TextureImporter)assetImporter;
            textureImporter.textureType = TextureImporterType.Default;
            textureImporter.textureShape = TextureImporterShape.Texture2D;
            textureImporter.mipmapEnabled = false;
            textureImporter.filterMode = FilterMode.Bilinear;
        }
    }

    // private void OnPostprocessMaterial(Material material)
    // {
    //     if (assetPath.Contains("FairyRes"))
    //     {
    //         material.SetInt("_StraightAlphaInput", 1);
    //         AssetDatabase.SaveAssets();
    //     }
    // }

    // [MenuItem("Tools/ConvertGammaToLinearTex")]
    public static void ConvertGammaToLinearTex()
    {
        var assetGUIDs = Selection.assetGUIDs;
        foreach (var assetGUID in assetGUIDs)
        {
            var assetPath = AssetDatabase.GUIDToAssetPath(assetGUID);
            Debug.Log(assetPath);
            if (!assetPath.Contains(".png")) continue;
            
            Texture2D srcTex = AssetDatabase.LoadAssetAtPath<Texture2D>(assetPath);
            if (srcTex != null)
            {
                Texture2D temp = new Texture2D(srcTex.width, srcTex.height, TextureFormat.RGBA32, true);
                Color[] pixels = srcTex.GetPixels();
                for (int j = 0; j < pixels.Length; j++)
                {
                    Color pixel = pixels[j];
                    pixel.r = Mathf.Pow(pixel.r, 2.2f);
                    pixel.g = Mathf.Pow(pixel.g, 2.2f);
                    pixel.b = Mathf.Pow(pixel.b, 2.2f);
                    pixels[j] = pixel;
                }

                temp.SetPixels(pixels);
                temp.Apply();
                var bytes = temp.EncodeToPNG();
                File.WriteAllBytes(assetPath, bytes);
            }
        }

        return;
        // List<string> selectedAsset = FindSelectionObject("*. png");
        // int count = selectedAsset.Count;
        // for (int i = 0; i < count; i++)
        // {
        //     Texture2D srcTex = AssetDatabase.LoadAssetAtPath<Texture2D>(selectedAsset[i]);
        //     if (srcTex != null)
        //     {
        //         Texture2D temp = new Texture2D(srcTex.width, srcTex.height, TextureFormat.RGBA32, true);
        //         Color[] pixels = srcTex.GetPixels();
        //         for (int j = 0; j < pixels.Length; j++)
        //         {
        //             Color pixel = pixels[i];
        //             pixel.r = Mathf.Pow(pixel.r, 2.2f);
        //             pixel.g = Mathf.Pow(pixel.g, 2.2f);
        //             pixel.b = Mathf.Pow(pixel.b, 2.2f);
        //             pixels[i] = pixel;
        //         }
        //
        //         temp.SetPixels(pixels);
        //         temp.Apply();
        //         var bytes = temp.EncodeToPNG();
        //         File.WriteAllBytes(selectedAsset[i], bytes);
        //     }
        // }
    }
}