namespace IdleSpectator;

/// <summary>
/// Single source of truth: would the orange dossier show this EventLed Label?
/// Selection must equal presentation - unpresentable beats must not win Watching.
/// </summary>
public static class EventPresentability
{
    /// <summary>
    /// True when the candidate may own Layer A camera.
    /// Empty Label is only allowed for CharacterLed fill (task chip, no orange reason).
    /// </summary>
    public static bool WouldShow(InterestCandidate scene)
    {
        if (scene == null)
        {
            return false;
        }

        if (string.IsNullOrEmpty(scene.Label))
        {
            return scene.LeadKind == InterestLeadKind.CharacterLed;
        }

        return !string.IsNullOrEmpty(UnitDossier.EvaluateSceneLabel(scene, recordDrops: false));
    }

    /// <summary>
    /// Shown orange reason, or empty when blanked by identity / ownership rules.
    /// </summary>
    public static string ShownReason(InterestCandidate scene, bool recordDrops = true)
    {
        return UnitDossier.EvaluateSceneLabel(scene, recordDrops);
    }

    /// <summary>
    /// Harness synthetic tips ("HoldAction") must be subject-led EventReason shape
    /// so the presentability gate matches production dossier rules.
    /// </summary>
    public static string EnsureSubjectLedLabel(Actor subject, string label)
    {
        if (string.IsNullOrEmpty(label))
        {
            return label ?? "";
        }

        string name = EventFeedUtil.SafeName(subject);
        if (string.IsNullOrEmpty(name))
        {
            return label;
        }

        if (label.StartsWith(name, System.StringComparison.OrdinalIgnoreCase))
        {
            return label;
        }

        // "Name is in scene: HoldAction" → EventSentence + subject-led first token.
        return name + " is in scene: " + label;
    }
}