From 073f2c1504aa58cb700e71da2279a9d7c0530d54 Mon Sep 17 00:00:00 2001
From: Naeel <naeel@kube5s.ru>
Date: Sun, 26 Apr 2026 10:59:39 +0300
Subject: [PATCH] layer1: add live namespace counts

---
 .../2026-04-26-namespace-manager-step48.md    | 19 +++++++++++++++++++
 pkg/utils/namespace_manager.go                |  2 ++
 pkg/utils/namespace_manager_model.go          |  1 +
 pkg/utils/namespace_manager_test.go           |  6 ++++++
 4 files changed, 28 insertions(+)
 create mode 100644 doc/thinking/2026-04-26-namespace-manager-step48.md

diff --git a/doc/thinking/2026-04-26-namespace-manager-step48.md b/doc/thinking/2026-04-26-namespace-manager-step48.md
new file mode 100644
index 00000000..11879edc
--- /dev/null
+++ b/doc/thinking/2026-04-26-namespace-manager-step48.md
@@ -0,0 +1,19 @@
+# 2026-04-26 — NamespaceManager rewrite, step 48
+
+## Цель шага
+
+Убрать двусмысленность в `NamespaceManagerSummary`: сейчас `TotalNamespaces` включает и removed-записи.
+
+## Что меняем
+
+1. Добавляем `LiveNamespaces`.
+2. `Summary()` считает его по `Snapshot()`.
+3. `LogNamespaceManagerSummary()` пишет оба значения:
+   - `total_namespaces`
+   - `live_namespaces`
+4. Обновляем unit tests.
+
+## Что НЕ меняем
+
+- не меняем правила хранения removed records;
+- не меняем watcher behavior.
\ No newline at end of file
diff --git a/pkg/utils/namespace_manager.go b/pkg/utils/namespace_manager.go
index 9b5c4a66..68610e40 100644
--- a/pkg/utils/namespace_manager.go
+++ b/pkg/utils/namespace_manager.go
@@ -123,6 +123,7 @@ func LogNamespaceManagerSummary(logger *zap.Logger, message string, summary Name
 	}
 	logger.Info(message,
 		zap.Int("total_namespaces", summary.TotalNamespaces),
+		zap.Int("live_namespaces", summary.LiveNamespaces),
 		zap.Any("phase_counts", summary.PhaseCounts),
 		zap.Any("source_counts", summary.SourceCounts),
 		zap.Strings("subscribers", summary.Subscribers),
@@ -258,6 +259,7 @@ func (m *inMemoryNamespaceManager) Summary() NamespaceManagerSummary {
 	records := m.SnapshotRecords()
 	summary := NamespaceManagerSummary{
 		TotalNamespaces: len(records),
+		LiveNamespaces:  len(m.Snapshot()),
 		PhaseCounts:     make(map[NamespacePhase]int),
 		SourceCounts:    make(map[NamespaceSource]int),
 		Subscribers:     m.SnapshotSubscribers(),
diff --git a/pkg/utils/namespace_manager_model.go b/pkg/utils/namespace_manager_model.go
index 21af97f3..0e935842 100644
--- a/pkg/utils/namespace_manager_model.go
+++ b/pkg/utils/namespace_manager_model.go
@@ -75,6 +75,7 @@ type NamespaceEvent struct {
 
 type NamespaceManagerSummary struct {
 	TotalNamespaces int
+	LiveNamespaces  int
 	PhaseCounts     map[NamespacePhase]int
 	SourceCounts    map[NamespaceSource]int
 	Subscribers     []string
diff --git a/pkg/utils/namespace_manager_test.go b/pkg/utils/namespace_manager_test.go
index 934588f2..f00cb9a2 100644
--- a/pkg/utils/namespace_manager_test.go
+++ b/pkg/utils/namespace_manager_test.go
@@ -63,6 +63,9 @@ func TestNamespaceManagerSnapshotAndGet(t *testing.T) {
 	if summary.TotalNamespaces != 2 {
 		t.Fatalf("expected summary total namespaces to be 2, got %d", summary.TotalNamespaces)
 	}
+	if summary.LiveNamespaces != 2 {
+		t.Fatalf("expected live namespaces to be 2, got %d", summary.LiveNamespaces)
+	}
 	if summary.SourceCounts[NamespaceSourceWatcher] != 2 {
 		t.Fatalf("expected watcher source count to be 2")
 	}
@@ -467,6 +470,9 @@ func TestNamespaceManagerSummary(t *testing.T) {
 	if summary.TotalNamespaces != 2 {
 		t.Fatalf("expected total namespaces 2, got %d", summary.TotalNamespaces)
 	}
+	if summary.LiveNamespaces != 1 {
+		t.Fatalf("expected one live namespace, got %d", summary.LiveNamespaces)
+	}
 	if summary.PhaseCounts[NamespacePhaseRegistering] != 1 {
 		t.Fatalf("expected one registering namespace")
 	}