namespace Zcbot.WindowsNode;

internal sealed class SoftwareProbeService
{
    private readonly Func<AdapterRuntimeStatus> probe;
    private readonly object sync = new();
    private AdapterRuntimeStatus? cachedRuntime;
    private DateTimeOffset runtimeCheckedAt;

    internal SoftwareProbeService(AdapterExecutionService execution)
        : this(execution.Probe)
    {
    }

    internal SoftwareProbeService(Func<AdapterRuntimeStatus> probe)
    {
        this.probe = probe;
    }

    internal AdapterRuntimeStatus Detect()
    {
        lock (sync)
        {
            if (cachedRuntime is null
                || DateTimeOffset.UtcNow - runtimeCheckedAt > TimeSpan.FromSeconds(30))
            {
                cachedRuntime = probe();
                runtimeCheckedAt = DateTimeOffset.UtcNow;
            }
            return cachedRuntime;
        }
    }

    internal void Invalidate()
    {
        lock (sync)
        {
            cachedRuntime = null;
            runtimeCheckedAt = default;
        }
    }
}