namespace Housing.Services;

public static class StartSignalWatcher
{
    public static Task WaitForStartAsync(StartSignalSettings settings, CancellationToken cancellationToken = default)
    {
        if (!settings.Enabled)
        {
            return Task.CompletedTask;
        }

        var connection = GetConnection(settings);
        return connection switch
        {
            "NI6501" or "NI-6501" or "NIDAQ" or "DAQ" => new Ni6501StartSignalWatcher(settings).WaitForStartAsync(cancellationToken),
            "TCP" or "LAN" or "ETHERNET" => new TcpStartSignalWatcher(settings).WaitForStartAsync(cancellationToken),
            _ => throw new InvalidOperationException("Hardware.ini [StartSignal] Connection은 Ni6501 또는 Tcp로 설정하세요.")
        };
    }

    public static string Describe(StartSignalSettings settings)
    {
        var connection = GetConnection(settings);
        return connection switch
        {
            "NI6501" or "NI-6501" or "NIDAQ" or "DAQ" => $"NI-6501 {settings.PhysicalChannel}",
            "TCP" or "LAN" or "ETHERNET" => string.IsNullOrWhiteSpace(settings.ReadCommand)
                ? $"LAN {settings.Host}:{settings.Port} 수신 대기"
                : $"LAN {settings.Host}:{settings.Port} 명령: {settings.ReadCommand}",
            _ => connection
        };
    }

    private static string GetConnection(StartSignalSettings settings)
    {
        return string.IsNullOrWhiteSpace(settings.Connection)
            ? "NI6501"
            : settings.Connection.Trim().ToUpperInvariant();
    }
}