namespace ZB.MOM.WW.OtOpcUa.Driver.Ab.Transport;

public static class AbStatusCodes
{
    /// <summary>Maps a CIP general status (and optional extended status words) to an <see cref="AbStatus"/>.</summary>
    /// <param name="general">The CIP general status byte.</param>
    /// <param name="extended">The extended status words, if any.</param>
    /// <returns>The mapped status.</returns>
    public static AbStatus FromCip(byte general, ReadOnlySpan<ushort> extended) => general switch
    {
        0x00 or 0x0B => AbStatus.Ok,
        0x04 or 0x05 or 0x16 => AbStatus.NotFound,
        0x06 => AbStatus.Partial,
        0x08 => AbStatus.Unsupported,
        0x0A => AbStatus.OutOfBounds,
        0x0C or 0x10 => AbStatus.DeviceStateConflict,
        0x0E or 0x0F => AbStatus.NotAllowed,
        0x13 => AbStatus.TooSmall,
        0x15 => AbStatus.TooLarge,
        0xFF when extended.Length > 0 && extended[0] == 0x2105 => AbStatus.OutOfBounds,
        0xFF when extended.Length > 0 && extended[0] == 0x2107 => AbStatus.TypeMismatch,
        _ => AbStatus.BadReply,
    };

    /// <summary>Maps a PCCC status byte (and optional extended status) to an <see cref="AbStatus"/>.</summary>
    /// <param name="sts">The PCCC STS byte.</param>
    /// <param name="extSts">The extended status byte, when present.</param>
    /// <returns>The mapped status.</returns>
    public static AbStatus FromPccc(byte sts, byte? extSts) => sts switch
    {
        0x00 => AbStatus.Ok,
        0x10 => AbStatus.Unsupported,
        0x20 => AbStatus.NotFound,
        0x30 => AbStatus.NotAllowed,
        0x40 or 0x50 => AbStatus.DeviceStateConflict,
        0xF0 when extSts is 0x06 or 0x07 => AbStatus.NotFound,
        _ => AbStatus.BadReply,
    };
}