fix: alarm collector handles real media-server format

internal/service/alarm_collector.go

@@ -89,18 +89,7 @@ func (c *AlarmCollector) fetchDeviceAlarms(dev *models.Device) ([]AlarmRecord, e
 	}
 
 	var resp struct {
-		Alarms []struct {
-			ID          string  `json:"id"`
-			Timestamp   string  `json:"timestamp"`
-			Channel     string  `json:"channel"`
-			RuleName    string  `json:"rule_name"`
-			RuleType    string  `json:"rule_type"`
-			ObjectLabel string  `json:"object_label"`
-			Confidence  float64 `json:"confidence"`
-			SnapshotURL string  `json:"snapshot_url"`
-			ClipURL     string  `json:"clip_url"`
-			DurationMs  int64   `json:"duration_ms"`
-		} `json:"alarms"`
+		Alarms []map[string]any `json:"alarms"`
 	}
 	if err := json.Unmarshal(body, &resp); err != nil {
 		return nil, err
@@ -109,23 +98,52 @@ func (c *AlarmCollector) fetchDeviceAlarms(dev *models.Device) ([]AlarmRecord, e
 	newLastID := lastID
 	alarms := make([]AlarmRecord, 0)
 	for _, a := range resp.Alarms {
-		if a.ID == lastID {
+		id, _ := a["id"].(string)
+		if id == "" {
+			continue
+		}
+		if id == lastID {
 			break // reached previously seen alarms
 		}
+		// Extract fields from whatever format media-server sends
+		channel, _ := a["channel"].(string)
+		if channel == "" {
+			channel, _ = a["node_id"].(string) // media-server uses node_id
+		}
+		ruleName, _ := a["rule_name"].(string)
+		ruleType, _ := a["rule_type"].(string)
+		objectLabel, _ := a["object_label"].(string)
+		snapshotURL, _ := a["snapshot_url"].(string)
+		clipURL, _ := a["clip_url"].(string)
+		// Timestamp can be string (RFC3339) or number (unix millis)
+		var ts string
+		switch v := a["timestamp"].(type) {
+		case string:
+			ts = v
+		case float64:
+			ts = time.UnixMilli(int64(v)).Format(time.RFC3339)
+		}
+		confidence, _ := a["confidence"].(float64)
+		if confidence == 0 {
+			if score, ok := a["score"].(float64); ok {
+				confidence = score
+			}
+		}
+		durationMs, _ := a["duration_ms"].(float64)
 		alarms = append(alarms, AlarmRecord{
-			ID:          a.ID,
-			Timestamp:   a.Timestamp,
-			Channel:     a.Channel,
-			RuleName:    a.RuleName,
-			RuleType:    a.RuleType,
-			ObjectLabel: a.ObjectLabel,
-			Confidence:  a.Confidence,
-			SnapshotURL: a.SnapshotURL,
-			ClipURL:     a.ClipURL,
-			DurationMs:  a.DurationMs,
+			ID:          id,
+			Timestamp:   ts,
+			Channel:     channel,
+			RuleName:    ruleName,
+			RuleType:    ruleType,
+			ObjectLabel: objectLabel,
+			Confidence:  confidence,
+			SnapshotURL: snapshotURL,
+			ClipURL:     clipURL,
+			DurationMs:  int64(durationMs),
 		})
 		if newLastID == "" {
-			newLastID = a.ID
+			newLastID = id
 		}
 	}