#if UNITY_EDITOR
using System;
using System.IO;
using System.IO.Compression;
using UnityEditor;
using UnityEngine;

public static class DlcPackageBuilderEditor
{
    private const string PackageExtension = "bsnkdlc";

    [MenuItem("Bansonic/DLC/Build .bsnkdlc From Folder")]
    private static void BuildPackageFromFolder()
    {
        string sourceFolder = EditorUtility.OpenFolderPanel("选择 DLC 源文件夹", Application.dataPath, string.Empty);
        if (string.IsNullOrWhiteSpace(sourceFolder) || !Directory.Exists(sourceFolder))
        {
            return;
        }

        string defaultName = new DirectoryInfo(sourceFolder).Name + "." + PackageExtension;
        string outputPath = EditorUtility.SaveFilePanel("保存 .bsnkdlc", Path.GetDirectoryName(sourceFolder), defaultName, PackageExtension);
        if (string.IsNullOrWhiteSpace(outputPath))
        {
            return;
        }

        try
        {
            BuildArchive(sourceFolder, outputPath);
            EditorUtility.DisplayDialog("DLC 打包完成", "已生成：\n" + outputPath, "确定");
        }
        catch (Exception ex)
        {
            Debug.LogError("[DLC] Build .bsnkdlc failed: " + ex);
            EditorUtility.DisplayDialog("DLC 打包失败", ex.Message, "确定");
        }
    }

    private static void BuildArchive(string sourceFolder, string outputPath)
    {
        if (File.Exists(outputPath))
        {
            File.Delete(outputPath);
        }

        string tempZipPath = outputPath + ".tmpzip";
        if (File.Exists(tempZipPath))
        {
            File.Delete(tempZipPath);
        }

        try
        {
            using (FileStream stream = new FileStream(tempZipPath, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.None))
            using (ZipArchive archive = new ZipArchive(stream, ZipArchiveMode.Create))
            {
                string[] files = Directory.GetFiles(sourceFolder, "*", SearchOption.AllDirectories);
                for (int i = 0; i < files.Length; i++)
                {
                    string filePath = files[i];
                    string relativePath = filePath.Substring(sourceFolder.Length).TrimStart(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar);
                    relativePath = relativePath.Replace('\\', '/');
                    archive.CreateEntryFromFile(filePath, relativePath, System.IO.Compression.CompressionLevel.Optimal);
                }
            }

            File.Move(tempZipPath, outputPath);
            AssetDatabase.Refresh();
        }
        finally
        {
            if (File.Exists(tempZipPath))
            {
                File.Delete(tempZipPath);
            }
        }
    }
}
#endif