using System;
using System.IO;
using System.Diagnostics;
using System.Text;

public static class ClipboardFusionHelper
{
    public static string ProcessText(string text)
    {
        if (string.IsNullOrWhiteSpace(text))
            return text;

        string pandocPath = @"D:\Tools\开发设计\pandoc\pandoc.exe";
        if (!File.Exists(pandocPath))
        {
            BFS.Dialog.ShowMessageError("Pandoc 未找到，路径：" + pandocPath);
            return text;
        }

        string tempMd = Path.GetTempFileName() + ".md";
        string rtfOutput = "";

        try
        {
            // 写入临时文件：UTF-8 with BOM，确保正确处理中文和换行
            File.WriteAllText(tempMd, text, new UTF8Encoding(true));

            // 启用 hard_line_breaks 保留单个换行
            string args = $"\"{tempMd}\" -f markdown+hard_line_breaks -t rtf --standalone --wrap=none";

            var psi = new ProcessStartInfo
            {
                FileName = pandocPath,
                Arguments = args,
                UseShellExecute = false,
                RedirectStandardOutput = true,
                RedirectStandardError = true,
                CreateNoWindow = true,
                StandardOutputEncoding = Encoding.UTF8,
                StandardErrorEncoding = Encoding.UTF8
            };

            using (var process = Process.Start(psi))
            {
                rtfOutput = process.StandardOutput.ReadToEnd();
                string error = process.StandardError.ReadToEnd();
                process.WaitForExit();

                if (process.ExitCode != 0)
                {
                    BFS.Dialog.ShowMessageError("Pandoc Conversion failed：\n" + error);
                    return rtfOutput;
                }
            }
            // 写入剪贴板：纯文本 + RTF
            var data = new System.Windows.Forms.DataObject();
            data.SetText(text, System.Windows.Forms.TextDataFormat.UnicodeText);
            data.SetText(rtfOutput, System.Windows.Forms.TextDataFormat.Rtf);
            System.Windows.Forms.Clipboard.SetDataObject(data, true);

            // 成功提示（可选，如需静默可删除）
            BFS.Dialog.ShowTrayMessage("Markdown → RTF Conversion successful!");
        }
        catch (Exception ex)
        {
            BFS.Dialog.ShowMessageError("Error：\n" + ex.Message + "\n" + ex.StackTrace);
        }
        finally
        {
            if (File.Exists(tempMd))
                File.Delete(tempMd);
        }

        return text;
    }
}