Background Location that
Actually Works.

// 1. Check current status (Non-blocking)
val status = Anchor.checkPermission(PermissionScope.BACKGROUND)

if (status == PermissionStatus.GRANTED) {
    Anchor.startTracking()
} else {
    // 2. Request Permissions (Suspend function)
    // Handles OS dialogs & rationale automatically
    val result = Anchor.requestPermission(
        scope = PermissionScope.BACKGROUND
    )

    if (result == PermissionStatus.GRANTED) {
        Anchor.startTracking()
    }
}

// 1. Get One-Time Snapshot
val snapshot = Anchor.getLocation()
println("Current: ${snapshot.latitude}, ${snapshot.longitude}")


// 2. Start Continuous Tracking
Anchor.startTracking()


// 3. Listen to updates (Foreground & Background)
Anchor.locationFlow.collect { location ->
    println("New Fix: ${location.speed} m/s")
    
    if (location.isMock) {
        Alert.show("Fake GPS detected!")
    }
}


// 4. Stop Tracking
Anchor.stopTracking()

// 1. Add Circular Geofence
Anchor.addGeofence(
    id = "office_hq",
    center = AnchorPoint(52.52, 13.40),
    radius = 200.meters
)

// 2. Add Polygon Zone (Complex Shape)
Anchor.addGeofence(
    id = "warehouse_sector_a",
    points = listOf(
        AnchorPoint(52.5, 13.4),
        AnchorPoint(52.6, 13.5),
        AnchorPoint(52.7, 13.3)
    )
)

// 3. Listen for Events
// Note: Anchor automatically persists geofences and
// restores them on device reboot. No need to re-add.
Anchor.geofenceFlow.collect { event ->
    when(event.type) {
        GeofenceType.ENTER -> notify("Welcome to ${event.regionId}")
        GeofenceType.EXIT -> logExit(event.regionId)
    }
}