vicare: Diagnostics (#69819)

* vicare: Diagnostics

* Exclude diagnostics from codecoverage

.coveragerc

@@ -1367,6 +1367,7 @@ omit =
     homeassistant/components/vicare/button.py
     homeassistant/components/vicare/climate.py
     homeassistant/components/vicare/const.py
+    homeassistant/components/vicare/diagnostics.py
     homeassistant/components/vicare/__init__.py
     homeassistant/components/vicare/sensor.py
     homeassistant/components/vicare/water_heater.py

homeassistant/components/vicare/diagnostics.py

@@ -0,0 +1,29 @@
+"""Diagnostics support for ViCare."""
+from __future__ import annotations
+
+import json
+from typing import Any
+
+from homeassistant.components.diagnostics import async_redact_data
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import CONF_CLIENT_ID, CONF_PASSWORD, CONF_USERNAME
+from homeassistant.core import HomeAssistant
+
+from .const import DOMAIN, VICARE_DEVICE_CONFIG
+
+TO_REDACT = {CONF_CLIENT_ID, CONF_PASSWORD, CONF_USERNAME}
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, entry: ConfigEntry
+) -> dict[str, Any]:
+    """Return diagnostics for a config entry."""
+    # Currently we only support a single device
+    device = hass.data[DOMAIN][entry.entry_id][VICARE_DEVICE_CONFIG]
+    data: dict[str, Any] = json.loads(
+        await hass.async_add_executor_job(device.dump_secure)
+    )
+    return {
+        "entry": async_redact_data(entry.as_dict(), TO_REDACT),
+        "data": data,
+    }