From dd5c4eaec288204c900a96ab1bb675328bd374f9 Mon Sep 17 00:00:00 2001
From: Pete Schwamb <pete@schwamb.net>
Date: Sat, 31 Oct 2026 22:53:22 -0500
Subject: [PATCH] Delay the Bluetooth Off alert and make it time sensitive

Turning Bluetooth off briefly on purpose (a meeting, a service, at night)
set off a critical alarm immediately. Issue it after 10 minutes as a
time-sensitive alert instead; turning Bluetooth back on before then
retracts the pending alert. Longer outages are still covered by the
Loop not running and missing glucose alerts.

Closes LoopKit/Loop#2633
---
 Loop/Managers/Alerts/AlertManager.swift        |  5 +++--
 .../Managers/Alerts/AlertManagerTests.swift    | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/Loop/Managers/Alerts/AlertManager.swift b/Loop/Managers/Alerts/AlertManager.swift
index 21c8a5d0ee..54d33126df 100644
--- a/Loop/Managers/Alerts/AlertManager.swift
+++ b/Loop/Managers/Alerts/AlertManager.swift
@@ -59,6 +59,7 @@ public final class AlertManager {
     let alertStore: AlertStore
 
     private let bluetoothPoweredOffIdentifier = Alert.Identifier(managerIdentifier: managerIdentifier, alertIdentifier: "bluetoothPoweredOff")
+    static let bluetoothPoweredOffAlertDelay = TimeInterval(minutes: 10)
 
     var analyticsServicesManager: AnalyticsServicesManager
 
@@ -177,8 +178,8 @@ public final class AlertManager {
             await issueAlert(Alert(identifier: bluetoothPoweredOffIdentifier,
                              foregroundContent: fgcontent,
                              backgroundContent: bgcontent,
-                             trigger: .immediate,
-                             interruptionLevel: .critical))
+                             trigger: .delayed(interval: Self.bluetoothPoweredOffAlertDelay),
+                             interruptionLevel: .timeSensitive))
         }
     }
 
diff --git a/LoopTests/Managers/Alerts/AlertManagerTests.swift b/LoopTests/Managers/Alerts/AlertManagerTests.swift
index d6a422f230..44668aba45 100644
--- a/LoopTests/Managers/Alerts/AlertManagerTests.swift
+++ b/LoopTests/Managers/Alerts/AlertManagerTests.swift
@@ -331,6 +331,24 @@ class AlertManagerTests: XCTestCase {
             XCTAssertEqual(request.content.sound, .defaultCriticalSound(withAudioVolume: 0))
         }
     }
+
+    func testBluetoothPoweredOffIssuesDelayedTimeSensitiveAlert() async {
+        mockModalScheduler.alertScheduledExpectation = expectation(description: "alert scheduled")
+        alertManager.bluetoothDidUpdateState(.poweredOff)
+        await fulfillment(of: [mockModalScheduler.alertScheduledExpectation!], timeout: 1)
+
+        let alert = mockModalScheduler.scheduledAlert
+        XCTAssertEqual(alert?.identifier.alertIdentifier, "bluetoothPoweredOff")
+        XCTAssertEqual(alert?.trigger, .delayed(interval: AlertManager.bluetoothPoweredOffAlertDelay))
+        XCTAssertEqual(alert?.interruptionLevel, .timeSensitive)
+    }
+
+    func testBluetoothPoweredOnRetractsAlert() async {
+        mockModalScheduler.alertUnscheduledExpectation = expectation(description: "alert unscheduled")
+        alertManager.bluetoothDidUpdateState(.poweredOn)
+        await fulfillment(of: [mockModalScheduler.alertUnscheduledExpectation!], timeout: 1)
+        XCTAssertEqual(mockModalScheduler.unscheduledAlertIdentifier?.alertIdentifier, "bluetoothPoweredOff")
+    }
 }
 
 extension Swift.Result {