/*************************************************************************
 * ModernUO                                                              *
 * Copyright 2019-2021 - ModernUO Development Team                       *
 * Email: hi@modernuo.com                                                *
 * File: PathUtility.cs                                                  *
 *                                                                       *
 * This program is free software: you can redistribute it and/or modify  *
 * it under the terms of the GNU General Public License as published by  *
 * the Free Software Foundation, either version 3 of the License, or     *
 * (at your option) any later version.                                   *
 *                                                                       *
 * You should have received a copy of the GNU General Public License     *
 * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
 *************************************************************************/

using System;
using System.IO;
using Server.Text;

namespace Server
{
    public static class PathUtility
    {
        public static string EnsureDirectory(string dir)
        {
            var path = GetFullPath(dir, Core.BaseDirectory);
            Directory.CreateDirectory(path);

            return path;
        }

        public static void EnsureDirectory(this FileInfo fi)
        {
            var dir = GetFullPath(fi.DirectoryName, Core.BaseDirectory);
            if (dir != null)
            {
                Directory.CreateDirectory(dir);
            }
        }

        public static void EnsureDirectory(this DirectoryInfo di)
        {
            var file = GetFullPath(di.FullName, Core.BaseDirectory);
            Directory.CreateDirectory(file);
        }

        public static string GetFullPath(string relativeOrAbsolutePath) =>
            GetFullPath(relativeOrAbsolutePath, Core.BaseDirectory);

        public static string GetFullPath(string relativeOrAbsolutePath, string basePath) =>
            relativeOrAbsolutePath switch
            {
                null => null,
                ""   => basePath,
                _ => Path.IsPathRooted(relativeOrAbsolutePath)
                    ? relativeOrAbsolutePath
                    : Path.GetFullPath(relativeOrAbsolutePath, basePath)
            };

        public static string EnsureRandomPath(string basePath)
        {
            Span<byte> bytes = stackalloc byte[8];
            Utility.RandomBytes(bytes);
            return EnsureDirectory(Path.Combine(basePath, bytes.ToHexString()));
        }
    }
}