From b147fa2f3108a322bb8a3d21175840783bb802da Mon Sep 17 00:00:00 2001
From: Pierre-Olivier Mercier <nemunaire@nemunai.re>
Date: Thu, 16 Apr 2026 04:43:40 +0700
Subject: [PATCH] Handle empty targets case in Evaluate with StatusUnknown

---
 checker/evaluate.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/checker/evaluate.go b/checker/evaluate.go
index f07c543..8cef1aa 100644
--- a/checker/evaluate.go
+++ b/checker/evaluate.go
@@ -67,7 +67,18 @@ const (
 )
 
 // Evaluate checks the ping data against the given thresholds.
+// StatusUnknown indicates the check could not be performed.
+const StatusUnknown = 0
+
 func Evaluate(data *PingData, warningRTT, criticalRTT, warningPacketLoss, criticalPacketLoss float64) EvaluateResult {
+	if len(data.Targets) == 0 {
+		return EvaluateResult{
+			Status:  StatusUnknown,
+			Message: "No targets to ping",
+			Code:    "ping_no_targets",
+		}
+	}
+
 	overallStatus := StatusOK
 	var summaryParts []string