namespace PacketIO;

public class PacketFile : IPacketFile
{
    private string fileName;
    private TempFile? tempFile;
    private Stream stream;

    public PacketFile(string fileName)
    {
        this.fileName = fileName;
        this.tempFile = new TempFile();
        this.stream = tempFile.Open(FileMode.Open);
    }

    public PacketFile(string fileName, Stream stream)
    {
        this.fileName = fileName;
        this.stream = stream;
    }

    public IEnumerable<IPacketFile> EnumerableFiles()
    {
        return [];
    }

    public string GetFileName()
    {
        return this.fileName;
    }

    public long GetFileSize()
    {
        return this.stream.Length;
    }

    public PacketFileType GetFileType()
    {
        return PacketFileType.File;
    }

    public async ValueTask<int> ReadAsync(byte[] buffer, int offset, int count)
    {
        int read = await this.stream.ReadAsync(buffer, offset, count).ConfigureAwait(false);
        return read;
    }

    public async ValueTask WriteAsync(byte[] buffer, int offset, int count)
    {
        await this.stream.WriteAsync(buffer, offset, count).ConfigureAwait(false);
    }

    public void Seek(long offset, SeekOrigin origin)
    {
        this.stream.Seek(offset, origin);
    }

    public void Dispose()
    {
        this.stream.Dispose();
        if (this.tempFile is object)
        {
            this.tempFile.Dispose();
        }
    }
}