logging and diagnostic features added

internal/httpapp/handlers.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"log"
 	"net/http"
+	"time"
 )
 
 func (a *App) handleDashboard(w http.ResponseWriter, r *http.Request) {
@@ -26,18 +27,58 @@ func (a *App) handleHealthz(w http.ResponseWriter, r *http.Request) {
 }
 
 func (a *App) handleMetrics(w http.ResponseWriter, r *http.Request) {
-	// Stub metrics (Prometheus format). We'll wire real collectors later.
+	// Collect real-time metrics
+	// ZFS metrics
+	pools, _ := a.zfs.ListPools()
+	datasets, _ := a.zfs.ListDatasets("")
+	zvols, _ := a.zfs.ListZVOLs("")
+	snapshots, _ := a.zfs.ListSnapshots("")
+
+	a.metricsCollector.UpdateZFSMetrics(pools, datasets, zvols, snapshots)
+
+	// Service metrics
+	smbShares := a.smbStore.List()
+	nfsExports := a.nfsStore.List()
+	iscsiTargets := a.iscsiStore.List()
+
+	smbStatus, _ := a.smbService.GetStatus()
+	nfsStatus, _ := a.nfsService.GetStatus()
+	iscsiStatus, _ := a.iscsiService.GetStatus()
+
+	a.metricsCollector.UpdateServiceMetrics(
+		len(smbShares),
+		len(nfsExports),
+		len(iscsiTargets),
+		smbStatus,
+		nfsStatus,
+		iscsiStatus,
+	)
+
+	// Job metrics
+	allJobs := a.jobManager.List("")
+	running := 0
+	completed := 0
+	failed := 0
+	for _, job := range allJobs {
+		switch job.Status {
+		case "running":
+			running++
+		case "completed":
+			completed++
+		case "failed":
+			failed++
+		}
+	}
+
+	a.metricsCollector.UpdateJobMetrics(len(allJobs), running, completed, failed)
+
+	// Update uptime
+	a.metricsCollector.SetUptime(int64(time.Since(a.startTime).Seconds()))
+
+	// Output Prometheus format
 	w.Header().Set("Content-Type", "text/plain; version=0.0.4")
 	w.WriteHeader(http.StatusOK)
-	_, _ = w.Write([]byte(
-		`# HELP atlas_build_info Build info
-# TYPE atlas_build_info gauge
-atlas_build_info{version="v0.1.0-dev"} 1
-# HELP atlas_up Whether the atlas-api process is up
-# TYPE atlas_up gauge
-atlas_up 1
-`,
-	))
+	_, _ = w.Write([]byte(a.metricsCollector.Collect()))
 }
 
 func (a *App) render(w http.ResponseWriter, name string, data any) {