using System;
using System.IO;

namespace Logof_Client;

public static class PathUtilities
{
    private static readonly char[] WindowsInvalidFileNameChars =
    {
        '<', '>', ':', '"', '/', '\\', '|', '?', '*'
    };

    private static readonly string[] WindowsReservedFileNames =
    {
        "CON", "PRN", "AUX", "NUL",
        "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9",
        "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9"
    };

    public static string NormalizeFileSystemPath(string path)
    {
        if (string.IsNullOrWhiteSpace(path)) return path;

        if (Uri.TryCreate(path, UriKind.Absolute, out var uri) && uri.IsFile)
            return uri.LocalPath;

        return path;
    }

    public static string NormalizeFileSystemPath(Uri path)
    {
        return path.IsFile ? path.LocalPath : path.ToString();
    }

    public static bool HasInvalidFileNameChars(string fileName)
    {
        if (string.IsNullOrWhiteSpace(fileName)) return true;
        if (fileName.EndsWith(' ') || fileName.EndsWith('.')) return true;
        if (fileName.IndexOfAny(Path.GetInvalidFileNameChars()) >= 0) return true;
        if (fileName.IndexOfAny(WindowsInvalidFileNameChars) >= 0) return true;

        var nameWithoutExtension = Path.GetFileNameWithoutExtension(fileName);
        foreach (var reservedName in WindowsReservedFileNames)
        {
            if (string.Equals(fileName, reservedName, StringComparison.OrdinalIgnoreCase) ||
                string.Equals(nameWithoutExtension, reservedName, StringComparison.OrdinalIgnoreCase))
                return true;
        }

        foreach (var c in fileName)
        {
            if (char.IsControl(c)) return true;
        }

        return false;
    }
}