using System.IO;

namespace EmbyToolbox.Services;

/// <summary>Разрешённые контейнеры для извлечения дорожек.</summary>
public static class TrackExtractionFormats
{
    private static readonly HashSet<string> Extensions = new(StringComparer.OrdinalIgnoreCase)
    {
        ".mkv", ".mp4",
    };

    public static bool IsSupportedPath(string path)
    {
        if (string.IsNullOrWhiteSpace(path))
        {
            return false;
        }

        var ext = Path.GetExtension(path);
        return !string.IsNullOrWhiteSpace(ext) && Extensions.Contains(ext);
    }

    public static string BuildOpenFileFilter() => "MKV и MP4|*.mkv;*.mp4|Все файлы|*.*";

    public static IReadOnlyList<string> EnumerateMediaFilesRecursive(string rootDirectory)
    {
        if (string.IsNullOrWhiteSpace(rootDirectory) || !Directory.Exists(rootDirectory))
        {
            return Array.Empty<string>();
        }

        var bag = new List<string>();
        try
        {
            foreach (var file in Directory.EnumerateFiles(rootDirectory, "*.*", SearchOption.AllDirectories))
            {
                if (IsSupportedPath(file))
                {
                    bag.Add(Path.GetFullPath(file));
                }
            }
        }
        catch (UnauthorizedAccessException)
        {
            // игнорируем недоступные подкаталоги
        }
        catch (IOException)
        {
        }

        bag.Sort(StringComparer.OrdinalIgnoreCase);
        return bag;
    }
}