fix(checkmk): use monitoring collection endpoint, batch state fetch, clearer Settings hints

server.ts

@@ -712,14 +712,15 @@ async function startServer() {
     }
 
     const authHeader = `Bearer ${CHECKMK_API_USER} ${CHECKMK_API_SECRET}`;
+    const headers = { Authorization: authHeader, Accept: 'application/json' };
 
-    // Step 1: build IP → hostname map from CheckMK host configurations
-    // Falls back to effective_attributes for IPs inherited from a parent folder.
+    // Step 1: build IP → hostname map from host configuration
+    // Checks both attributes (explicitly set) and effective_attributes (inherited).
     let ipToHostname: Map<string, string>;
     try {
       const cfgRes = await fetch(
         `${CHECKMK_API_URL}/domain-types/host_config/collections/all`,
-        { headers: { Authorization: authHeader, Accept: 'application/json' } }
+        { headers }
       );
       if (!cfgRes.ok) throw new Error(checkmkHttpHint(cfgRes.status));
       const cfgData = await cfgRes.json();
@@ -739,7 +740,32 @@ async function startServer() {
       return;
     }
 
-    // Step 2: update each device based on IP lookup and log status changes
+    // Step 2: fetch live monitoring state for all hosts in one call.
+    // /domain-types/host/collections/all returns monitoring objects with extensions.state
+    // where 0=UP, 1=DOWN, 2=UNREACHABLE.
+    let hostnameToState: Map<string, number>;
+    try {
+      const monRes = await fetch(
+        `${CHECKMK_API_URL}/domain-types/host/collections/all`,
+        { headers }
+      );
+      if (!monRes.ok) throw new Error(checkmkHttpHint(monRes.status));
+      const monData = await monRes.json();
+      hostnameToState = new Map<string, number>();
+      for (const host of monData?.value ?? []) {
+        const name: string | undefined = host?.id;
+        const state: number | undefined = host?.extensions?.state;
+        if (name !== undefined && state !== undefined) hostnameToState.set(name, state);
+      }
+    } catch (err: any) {
+      const msg = `CheckMK sync failed — could not fetch monitoring states: ${err?.message ?? err}`;
+      console.error('[CheckMK]', msg);
+      db.prepare('INSERT INTO logs (id, timestamp, type, message) VALUES (?, ?, ?, ?)')
+        .run(uid('log'), now, 'system', msg);
+      return;
+    }
+
+    // Step 3: update each device based on IP lookup + live state
     const rows = db.prepare('SELECT id, hostname, ip, status FROM devices').all() as { id: string; hostname: string; ip: string; status: string }[];
     const counts = { online: 0, offline: 0, unknown: 0 };
 
@@ -754,28 +780,14 @@ async function startServer() {
         counts.unknown++;
         continue;
       }
-      try {
-        const res = await fetch(
-          `${CHECKMK_API_URL}/objects/host/${encodeURIComponent(cmkHost)}`,
-          { headers: { Authorization: authHeader, Accept: 'application/json' } }
-        );
-        if (!res.ok) throw new Error(checkmkHttpHint(res.status));
-        const data = await res.json();
-        const hardState: number = data?.extensions?.state ?? -1;
-        const newStatus = hardState === 0 ? 'online' : 'offline';
+      const state = hostnameToState.get(cmkHost);
+      const newStatus = state === 0 ? 'online' : state === 1 || state === 2 ? 'offline' : 'unknown';
       db.prepare('UPDATE devices SET status = ?, lastCheckedAt = ? WHERE id = ?').run(newStatus, now, dev.id);
       if (dev.status !== newStatus) {
         db.prepare('INSERT INTO logs (id, timestamp, type, message, deviceId) VALUES (?, ?, ?, ?, ?)')
           .run(uid('log'), now, 'status', `CheckMK: ${dev.hostname} (${dev.ip}) status changed to ${newStatus} (was: ${dev.status}).`, dev.id);
       }
-        counts[newStatus as 'online' | 'offline']++;
-      } catch (err: any) {
-        const msg = `CheckMK: status sync failed for ${dev.hostname} (${dev.ip}) — ${err?.message ?? err}`;
-        console.error('[CheckMK]', msg);
-        db.prepare('INSERT INTO logs (id, timestamp, type, message, deviceId) VALUES (?, ?, ?, ?, ?)')
-          .run(uid('log'), now, 'system', msg, dev.id);
-        counts.unknown++;
-      }
+      counts[newStatus as 'online' | 'offline' | 'unknown']++;
     }
 
     db.prepare('INSERT INTO logs (id, timestamp, type, message) VALUES (?, ?, ?, ?)')

src/components/Settings.tsx

@@ -449,7 +449,7 @@ export default function Settings({ currentUser: _currentUser }: SettingsProps) {
             />
           </FieldRow>
           <div className="grid grid-cols-1 sm:grid-cols-2 gap-5">
-            <FieldRow label="Automation User" hint="CheckMK automation user (default: automation)">
+            <FieldRow label="Automation User" hint="Setup → Users → Automation user (e.g. automation)">
               <Input
                 value={checkmkApiUser}
                 onChange={setCheckmkApiUser}
@@ -460,6 +460,7 @@ export default function Settings({ currentUser: _currentUser }: SettingsProps) {
             </FieldRow>
             <FieldRow
               label="Automation Secret"
+              hint="Setup → Users → Automation user → Automation secret"
               badge={checkmkSecretSet ? <ConfiguredBadge /> : undefined}
             >
               <SecretInput