using System.Diagnostics;
using NativeFileDialogSharp;

namespace BangumiRenamer.Tools;

public static class FolderCloner
{
    public static void Run()
    {
        var result = Dialog.FolderPicker();
        if (!result.IsOk) return;
        var source = result.Path;
        
        result = Dialog.FolderPicker();
        if (!result.IsOk) return;
        var dest = Path.Combine(result.Path, Path.GetFileNameWithoutExtension(source.Replace("\\\\", "")));
        
        var finalDest = dest;
        int suffix = 1;
        while (Directory.Exists(finalDest))
        {
            finalDest = dest + suffix;
            ++suffix;
        }
        
        CloneStructureWithEmptyFiles(source, finalDest);
        Process.Start(new ProcessStartInfo
        {
            FileName = finalDest,
            UseShellExecute = true,
            Verb = "open"
        });
    }
    
    static void CloneStructureWithEmptyFiles(string source, string dest)
    {
        if (!Directory.Exists(source))
        {
            return;
        }
        if (Directory.Exists(dest))
        {
            return;
        }
        var queue = new Queue<string>();
        queue.Enqueue(source);
        while (queue.Count > 0)
        {
            var dir = queue.Dequeue();
            try
            {
                foreach (var filePath in Directory.GetFiles(dir))
                {
                    var newFilePath = Path.Combine(dest, Path.GetRelativePath(source, filePath));
                    using var _ = File.Create(newFilePath);
                }

                foreach (var dirPath in Directory.GetDirectories(dir))
                {
                    queue.Enqueue(dirPath);
                    var newDirPath = Path.Combine(dest, Path.GetRelativePath(source, dirPath));
                    Directory.CreateDirectory(newDirPath);
                }
            }
            catch (Exception ex)
            {
                Logger.G.Error(ex, "Clone");
            }
        }
    }
}