enrich health check result details

internal/watcher/health/monitor/json.go

@@ -2,6 +2,7 @@ package monitor
 
 import (
 	"encoding/json"
+	"strconv"
 	"time"
 
 	"github.com/yusing/go-proxy/internal/net/types"
@@ -15,6 +16,9 @@ type JSONRepresentation struct {
 	Status   health.Status
 	Started  time.Time
 	Uptime   time.Duration
+	Latency  time.Duration
+	LastSeen time.Time
+	Detail   string
 	URL      types.URL
 	Extra    map[string]any
 }
@@ -32,6 +36,11 @@ func (jsonRepr *JSONRepresentation) MarshalJSON() ([]byte, error) {
 		"status":      jsonRepr.Status.String(),
 		"uptime":      jsonRepr.Uptime.Seconds(),
 		"uptimeStr":   strutils.FormatDuration(jsonRepr.Uptime),
+		"latency":     jsonRepr.Latency.Seconds(),
+		"latencyStr":  strconv.Itoa(int(jsonRepr.Latency.Milliseconds())) + " ms",
+		"lastSeen":    jsonRepr.LastSeen.Unix(),
+		"lastSeenStr": strutils.FormatTime(jsonRepr.LastSeen),
+		"detail":      jsonRepr.Detail,
 		"url":         url,
 		"extra":       jsonRepr.Extra,
 	})

internal/watcher/health/monitor/monitor.go

@@ -16,6 +16,7 @@ import (
 	"github.com/yusing/go-proxy/internal/notif"
 	"github.com/yusing/go-proxy/internal/task"
 	U "github.com/yusing/go-proxy/internal/utils"
+	"github.com/yusing/go-proxy/internal/utils/strutils"
 	"github.com/yusing/go-proxy/internal/watcher/health"
 )
 
@@ -27,6 +28,9 @@ type (
 		url     U.AtomicValue[types.URL]
 
 		status     U.AtomicValue[health.Status]
+		lastResult *health.HealthCheckResult
+		lastSeen   time.Time
+
 		checkHealth HealthCheckFunc
 		startTime   time.Time
 
@@ -149,12 +153,16 @@ func (mon *monitor) String() string {
 
 // MarshalJSON implements json.Marshaler of HealthMonitor.
 func (mon *monitor) MarshalJSON() ([]byte, error) {
+	res := mon.lastResult
 	return (&JSONRepresentation{
 		Name:     mon.service,
 		Config:   mon.config,
 		Status:   mon.status.Load(),
 		Started:  mon.startTime,
 		Uptime:   mon.Uptime(),
+		Latency:  res.Latency,
+		LastSeen: mon.lastSeen,
+		Detail:   res.Detail,
 		URL:      mon.url.Load(),
 	}).MarshalJSON()
 }
@@ -170,19 +178,28 @@ func (mon *monitor) checkUpdateHealth() error {
 		}
 		return nil
 	}
+
+	mon.lastResult = result
 	var status health.Status
 	if result.Healthy {
 		status = health.StatusHealthy
+		mon.lastSeen = time.Now()
 	} else {
 		status = health.StatusUnhealthy
 	}
 	if result.Healthy != (mon.status.Swap(status) == health.StatusHealthy) {
 		extras := map[string]any{
 			"Service Name": mon.service,
-			"Service URL":  mon.url.Load().String(),
+			"Last Seen":    strutils.FormatTime(mon.lastSeen),
+		}
+		if !mon.url.Load().Nil() {
+			extras["Service URL"] = mon.url.Load().String()
+		}
+		if result.Detail != "" {
+			extras["Detail"] = result.Detail
 		}
 		if result.Healthy {
-			logger.Info().Msg("server is up")
+			logger.Info().Msg("service is up")
 			extras["Ping"] = fmt.Sprintf("%d ms", result.Latency.Milliseconds())
 			notif.Notify(&notif.LogMessage{
 				Title:  "✅ Service is up ✅",
@@ -190,9 +207,7 @@ func (mon *monitor) checkUpdateHealth() error {
 				Color:  notif.Green,
 			})
 		} else {
-			logger.Warn().Msg("server is down")
+			logger.Warn().Msg("service went down")
-			logger.Debug().Msg(result.Detail)
-			extras["Detail"] = result.Detail
 			notif.Notify(&notif.LogMessage{
 				Title:  "❌ Service went down ❌",
 				Extras: extras,