using UnityEditor;
using UnityEngine;
public enum size:int
{
    three = 256,
    four = 512,
    free = 1024,
    six = 2048,
    kaishi = 4096,
}
public class ScanAndConvertTextures : EditorWindow
{
    size size = size.free;
    int sum;
    [MenuItem("工具/UI转换工具")]
    private static void ShowWindow()
    {
        GetWindow(typeof(ScanAndConvertTextures));
    }

    private void OnGUI()
    {
        GUILayout.Label("将图片批量转换的工具，自动将02_UI下的png和jpg格式的图片转换为Sprite，并且分辨率改为1024", EditorStyles.boldLabel);
        GUILayout.FlexibleSpace();
        size = (size)EditorGUILayout.EnumPopup(size);
        
        if (GUILayout.Button("开始转换"))
        {
            ConvertTextures();
        }
    }
    private void ConvertTextures()
    {
        sum = (int)size;
        string folderPath = "Assets/02_UI";  // 修改为你想要扫描的文件夹路径

        string[] files = AssetDatabase.FindAssets("t:Texture2D", new[] { folderPath });

        foreach (var file in files)
        {
            string path = AssetDatabase.GUIDToAssetPath(file);
            TextureImporter importer = AssetImporter.GetAtPath(path) as TextureImporter;

            if (importer != null && (System.IO.Path.GetExtension(path) == ".png" || System.IO.Path.GetExtension(path) == ".jpg"))
            {
                if (importer.textureType != TextureImporterType.Sprite)
                {
                    importer.textureType = TextureImporterType.Sprite;
                    importer.spriteImportMode = SpriteImportMode.Single;

                    TextureImporterSettings textureSettings = new TextureImporterSettings();
                    importer.ReadTextureSettings(textureSettings);

                    textureSettings.maxTextureSize = 2048;
                    textureSettings.compressionQuality = (int)TextureCompressionQuality.Normal;
                    importer.crunchedCompression = true;
                    importer.SetTextureSettings(textureSettings);
                    importer.SaveAndReimport();
                    CrunchTexture(path);
                }
            }
        }

        Debug.Log("转换成功");
    }

    private void CrunchTexture(string path)
    {
        var texture = AssetDatabase.LoadAssetAtPath<Texture2D>(path);
        if (texture != null)
        {
            EditorUtility.CompressTexture(texture, TextureFormat.RGBA32, TextureCompressionQuality.Normal);
        }
    }
}