using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEditor.Build;
using UnityEditor.Build.Reporting;
using UnityEngine;

public class VirtualFPostProcess : IPostprocessBuildWithReport
{
    public int callbackOrder => 0;

    public void OnPostprocessBuild(BuildReport report)
    {
        string projectPath = Application.dataPath;
        string dataFolderPath = Path.Combine(projectPath, "../Data");
        string buildOutputPath = GetValidBuildPath(report);

        if (Directory.Exists(dataFolderPath))
        {
            // 目标目录强制小写
            string targetDataPath = Path.Combine(buildOutputPath, "data");
            CopyDirectoryWithLowerCaseNames(dataFolderPath, targetDataPath);
            Debug.Log($"数据目录已复制到: {targetDataPath}");
        }
        else
        {
            Debug.LogWarning("未找到数据目录: " + dataFolderPath);
        }
    }

    private string GetValidBuildPath(BuildReport report)
    {
        string path = report.summary.outputPath;
        if (path.Contains(".exe"))
        {
            return Path.GetDirectoryName(path);
        }
        return path;
    }

    private void CopyDirectoryWithLowerCaseNames(string sourceDir, string targetDir)
    {
        // 创建小写目标目录
        var lowerTargetDir = ConvertToLowerPath(targetDir);
        Directory.CreateDirectory(lowerTargetDir);

        // 复制文件（带小写转换）
        foreach (var file in Directory.GetFiles(sourceDir))
        {
            string fileName = Path.GetFileName(file);
            string lowerName = ConvertToLowerPath(fileName);
            File.Copy(file, Path.Combine(lowerTargetDir, lowerName), true);
        }

        // 递归处理子目录（带小写转换）
        foreach (var dir in Directory.GetDirectories(sourceDir))
        {
            string dirName = Path.GetFileName(dir);
            string lowerDirName = ConvertToLowerPath(dirName);
            CopyDirectoryWithLowerCaseNames(dir, Path.Combine(lowerTargetDir, lowerDirName));
        }
    }

    // 中英文混合路径转小写
    private string ConvertToLowerPath(string input)
    {
        char[] chars = input.ToCharArray();
        for (int i = 0; i < chars.Length; i++)
        {
            // 只处理ASCII字母字符（中文等Unicode字符保持不变）
            if (chars[i] >= 'A' && chars[i] <= 'Z')
            {
                chars[i] = (char)(chars[i] | 0x20); // 快速转小写
            }
        }
        return new string(chars);
    }
}