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

public class TextureImportSettingsEditor : EditorWindow
{
    [MenuItem("Tools/Set Texture Import Settings")]
    public static void ShowWindow()
    {
        // 显示自定义编辑器窗口
        GetWindow<TextureImportSettingsEditor>("Texture Import Settings");
    }

    private void OnGUI()
    {
        if (GUILayout.Button("Set Texture Import Settings for Current Scene"))
        {
            SetTextureImportSettings();
        }
    }

    // 设置当前场景中所有贴图的导入参数
    private static void SetTextureImportSettings()
    {
        // 获取当前场景中的所有材质
        HashSet<Texture> textures = new HashSet<Texture>();

        // 遍历场景中的所有 GameObject，获取材质中的贴图
        foreach (var renderer in FindObjectsOfType<Renderer>())
        {
            // 获取材质的所有贴图
            foreach (var material in renderer.sharedMaterials)
            {
                if (material != null)
                {
                    // 遍历材质的所有属性
                    foreach (var property in material.GetTexturePropertyNames())
                    {
                        Texture texture = material.GetTexture(property);
                        if (texture != null)
                        {
                            textures.Add(texture); // 添加到集合，避免重复
                        }
                    }
                }
            }
        }

        // 遍历所有找到的贴图并设置导入参数
        foreach (var texture in textures)
        {
            SetTextureImportSettings(texture);
        }

        Debug.Log("Texture import settings have been updated.");
    }

    // 设置单个纹理的导入参数
    private static void SetTextureImportSettings(Texture texture)
    {
        string assetPath = AssetDatabase.GetAssetPath(texture);

        if (string.IsNullOrEmpty(assetPath))
        {
            Debug.LogWarning($"Texture not found in assets: {texture.name}");
            return;
        }

        // 获取纹理的导入设置
        TextureImporter textureImporter = AssetImporter.GetAtPath(assetPath) as TextureImporter;

        if (textureImporter != null)
        {
            // 设置最大尺寸为 2048
            textureImporter.maxTextureSize = 2048;

            // 设置压缩格式为 ASTC 8x8
            textureImporter.textureCompression = TextureImporterCompression.Compressed;
            textureImporter.SetPlatformTextureSettings("Android", 2048, TextureImporterFormat.ASTC_8x8);

            // 应用这些更改
            EditorUtility.SetDirty(textureImporter);
            textureImporter.SaveAndReimport();
        }
        else
        {
            Debug.LogWarning($"TextureImporter not found for: {texture.name}");
        }
    }
}