using System.IO;
using System.Security.Cryptography;
using System.Text;

namespace Mitria_Minecraft_Updater
{
    public static class Extensions
    {
        public static void DirectoryCheckCrate(string path)
        {
            if (!System.IO.Directory.Exists(path))
            {
                System.IO.Directory.CreateDirectory(path);
            }
        }

        public static void DeleteEmptyDirectory(string path)
        {
            if (!System.IO.Directory.Exists(path))
            {
                return;
            }
            string[] directorys = System.IO.Directory.GetDirectories(path, "*", System.IO.SearchOption.AllDirectories);
            for (int i = directorys.Length; i > 0; i--)
            {
                int countDirectory = System.IO.Directory.GetDirectories(directorys[i - 1], "*", System.IO.SearchOption.AllDirectories).Length;
                int countFiles = System.IO.Directory.GetFiles(directorys[i - 1], "*", System.IO.SearchOption.AllDirectories).Length;
                if (countDirectory + countFiles == 0)
                {
                    System.IO.Directory.Delete(directorys[i - 1],true);
                }
            }
        }

        public static string[] GetDirectoriesRelativePath(string path, string searchPattern, System.IO.SearchOption searchOption)
        {
            string[] directories = System.IO.Directory.GetDirectories(path, searchPattern, searchOption);
            for (int i = 0; i < directories.Length; i++)
            {
                directories[i] = System.IO.Path.GetRelativePath(path, directories[i]);
            }

            return directories;
        }

        public static string[] GetFilesRelativePath(string path, string searchPattern, System.IO.SearchOption searchOption)
        {
            string[] files = System.IO.Directory.GetFiles(path, searchPattern, searchOption);
            for (int i = 0; i < files.Length; i++)
            {
                files[i] = System.IO.Path.GetRelativePath(path, files[i]);
            }

            return files;
        }

        public static string GetFileHash(string filePath)
        {
            FileInfo fileInfo = new FileInfo(filePath);
            byte[] hashCode = MD5.Create().ComputeHash(fileInfo.OpenRead());
            StringBuilder hashStringBuilder = new StringBuilder();
            foreach (byte b in hashCode)
            {
                hashStringBuilder.AppendFormat("{0:x2}", b);
            }
            return hashStringBuilder.ToString();
        }
    }
}