using dnlib.DotNet;
using System.IO;
using UnityEditor;
using UnityEngine;

namespace GFGEditor
{

    public class TextureAutoSet : EditorWindow
    {

        [MenuItem("Assets/*****设置文件夹以及子文件夹下面的图片压缩格式为ASTC", priority = 0)]
        static void AutoSetASTC()
        {
            string[] guidArray = Selection.assetGUIDs;
            foreach (var item in guidArray)
            {
                string selectFloder = AssetDatabase.GUIDToAssetPath(item);
                DirectoryInfo root = new DirectoryInfo(selectFloder);
                GetFloder(root);
            }
        }

        static void GetFloder(DirectoryInfo root)
        {
            GetFile(root);
            //查找子文件夹
            DirectoryInfo[] array = root.GetDirectories();
            //Debug.Log(root);
            foreach (DirectoryInfo item in array)
            {
                GetFloder(item);
            }
        }

        static void GetFile(DirectoryInfo root)
        {
            //DirectoryInfo root = new DirectoryInfo(path);
            FileInfo[] fileDic = root.GetFiles();
            foreach (var file in fileDic)
            {
                //sDebug.Log(file);
                if (!file.FullName.EndsWith(".meta"))
                {
                    //Debug.Log("-------------" + file.FullName);
                    //Debug.Log(Application.dataPath);
                    SetPicFormat(file.FullName.Replace(Application.dataPath.Replace("Assets", ""), ""));
                }
            }
        }

        static void SetPicFormat(string path)
        {
            string onePath = GetImageProjectPath(path);
            Debug.Log(onePath);
            TextureImporter textureImporter = AssetImporter.GetAtPath(onePath) as TextureImporter;
            if (textureImporter == null)
                return;
            if (textureImporter.mipmapEnabled == true)
            {
                textureImporter.mipmapEnabled = false;
            }

            ChangeTextureSetting(textureImporter); 
        }

        public static void ChangeTextureSetting(TextureImporter textureImporter)
        {
            ChangeIphoneSetting(textureImporter);
            ChangeAndroidSetting(textureImporter);
            textureImporter.SaveAndReimport();
        }

        static void ChangeIphoneSetting(TextureImporter textureImporter)
        {
            TextureImporterPlatformSettings settings = textureImporter.GetPlatformTextureSettings("Iphone");
            settings.overridden = true;
            settings.maxTextureSize = 2048;
            settings.format = TextureImporterFormat.ASTC_6x6;
            textureImporter.SetPlatformTextureSettings(settings);
        }
        static void ChangeAndroidSetting(TextureImporter textureImporter)
        {
            TextureImporterPlatformSettings settings = textureImporter.GetPlatformTextureSettings("Android");
            settings.overridden = true;
            settings.maxTextureSize = 2048;
            settings.format = TextureImporterFormat.ASTC_6x6;
            textureImporter.SetPlatformTextureSettings(settings);
        }

        /// <summary>
        /// 根据固定字符串得到资源路径
        /// </summary>
        /// <param name="fullName"></param>
        /// <returns></returns>
        static string GetImageProjectPath(string fullName)
        {
            string result = "";
            int index = fullName.LastIndexOf("Assets");
            result = fullName.Substring(index, fullName.Length - index);
            return result;
        }

    }
}