From 7ece35cd6f36f73be43da547df9bced4b5269560 Mon Sep 17 00:00:00 2001
From: Michael <35783820+mib1185@users.noreply.github.com>
Date: Thu, 23 Sep 2021 22:29:12 +0200
Subject: [PATCH] Assume Fritz!Smarthome device as unavailable (#56542)

---
 homeassistant/components/fritzbox/__init__.py | 12 ++++++++++++
 tests/components/fritzbox/__init__.py         |  1 +
 tests/components/fritzbox/test_switch.py      | 16 ++++++++++++++++
 3 files changed, 29 insertions(+)

diff --git a/homeassistant/components/fritzbox/__init__.py b/homeassistant/components/fritzbox/__init__.py
index d9226f36c87..8d354f655f6 100644
--- a/homeassistant/components/fritzbox/__init__.py
+++ b/homeassistant/components/fritzbox/__init__.py
@@ -68,6 +68,18 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
         data = {}
         for device in devices:
             device.update()
+
+            # assume device as unavailable, see #55799
+            if (
+                device.has_powermeter
+                and device.present
+                and hasattr(device, "voltage")
+                and device.voltage <= 0
+                and device.power <= 0
+                and device.energy <= 0
+            ):
+                device.present = False
+
             data[device.ain] = device
         return data
 
diff --git a/tests/components/fritzbox/__init__.py b/tests/components/fritzbox/__init__.py
index da6bd982d9d..dfa266dc15b 100644
--- a/tests/components/fritzbox/__init__.py
+++ b/tests/components/fritzbox/__init__.py
@@ -108,6 +108,7 @@ class FritzDeviceSwitchMock(FritzDeviceBaseMock):
     battery_level = None
     device_lock = "fake_locked_device"
     energy = 1234
+    voltage = 230
     fw_version = "1.2.3"
     has_alarm = False
     has_powermeter = True
diff --git a/tests/components/fritzbox/test_switch.py b/tests/components/fritzbox/test_switch.py
index 27461b2790f..b44a4ffc088 100644
--- a/tests/components/fritzbox/test_switch.py
+++ b/tests/components/fritzbox/test_switch.py
@@ -26,6 +26,7 @@ from homeassistant.const import (
     SERVICE_TURN_OFF,
     SERVICE_TURN_ON,
     STATE_ON,
+    STATE_UNAVAILABLE,
     TEMP_CELSIUS,
 )
 from homeassistant.core import HomeAssistant
@@ -137,3 +138,18 @@ async def test_update_error(hass: HomeAssistant, fritz: Mock):
 
     assert device.update.call_count == 2
     assert fritz().login.call_count == 2
+
+
+async def test_assume_device_unavailable(hass: HomeAssistant, fritz: Mock):
+    """Test assume device as unavailable."""
+    device = FritzDeviceSwitchMock()
+    device.voltage = 0
+    device.energy = 0
+    device.power = 0
+    assert await setup_config_entry(
+        hass, MOCK_CONFIG[FB_DOMAIN][CONF_DEVICES][0], ENTITY_ID, device, fritz
+    )
+
+    state = hass.states.get(ENTITY_ID)
+    assert state
+    assert state.state == STATE_UNAVAILABLE