ux

backend/app/services/influx_http.py

@@ -165,6 +165,34 @@ class InfluxHTTPService:
             logger.warning("Influx last_before error for %s: %s", metric.id, exc)
             return None
 
+    def diagnose(self) -> dict:
+        config = self.settings.influx
+        payload = {
+            "status": "connected",
+            "reachable": True,
+            "database_exists": False,
+            "url": self.base_url,
+            "database": config["database"],
+            "username_masked": _mask_secret(config.get("username") or ""),
+            "verify_ssl": bool(config.get("verify_ssl", False)),
+            "timeout_seconds": int(config.get("timeout_seconds", 15)),
+            "error": None,
+        }
+        try:
+            series = self._execute("SHOW DATABASES")
+            databases: set[str] = set()
+            for item in series:
+                for row in self._rows_from_series(item):
+                    value = row.get("name")
+                    if isinstance(value, str):
+                        databases.add(value)
+            payload["database_exists"] = config["database"] in databases
+        except Exception as exc:
+            payload["status"] = "error"
+            payload["reachable"] = False
+            payload["error"] = str(exc)
+        return payload
+
     def _single_value(self, query: str) -> SeriesPoint | None:
         try:
             series = self._execute(query)
@@ -239,3 +267,11 @@ def _parse_time(value: str | None) -> datetime | None:
         return datetime.fromisoformat(value.replace("Z", "+00:00"))
     except ValueError:
         return None
+
+
+def _mask_secret(value: str) -> str:
+    if not value:
+        return ""
+    if len(value) <= 2:
+        return "*" * len(value)
+    return value[:1] + ("*" * max(len(value) - 2, 1)) + value[-1:]