using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;


namespace JDSongConverter.Utils
{
    public class FileUtils
    {
        public static int GetFileCount(string directory)
        {
            int fileCount = 0;
            var dirInfo = new DirectoryInfo(directory);

            foreach (var dir in dirInfo.EnumerateDirectories())
            {
                fileCount += GetFileCount(dir.FullName);
            }
            fileCount += dirInfo.EnumerateFiles().Count();
            return fileCount;
        }

        public static StreamWriter OpenOrCreateFile(string fileName)
        {
            FileStream fileStream;
            if (File.Exists(fileName))
            {
                System.IO.File.SetAttributes(fileName, FileAttributes.Normal);
                fileStream = new FileStream(fileName, FileMode.Create);
            }
            else
            {
                fileStream = File.Create(fileName);
            }
            return new StreamWriter(fileStream);
        }

        [DllImport("Shlwapi.dll", SetLastError = true, CharSet = CharSet.Auto)]
        private extern static bool PathFileExists(StringBuilder path);

        public static bool FastFileExists(string path)
        {
            var builder = new StringBuilder();
            builder.Append(path);
            return PathFileExists(builder);
        }
    }

    
}