enhanced default cluster selection, add 'cluster switch', overhaul json header setting (#47)

pkg/es/cluster.go

@@ -20,7 +20,6 @@ import (
 	"context"
 	"fmt"
 	"log/slog"
-	"slices"
 	"strings"
 	"sync"
 
@@ -59,36 +58,37 @@ type apiResponse struct {
 }
 
 func ClusterList(conf *cfg.Config) error {
-	table := printer.NewTable(conf, 3, len(conf.Clusters))
+	table := printer.NewTable(conf, 4, len(conf.Clusters))
 
-	table.Addheaders("cluster", "uri", "default")
+	table.Addheaders("cluster", "uri", "reachable", "current")
 
 	idx := 0
 
-	names := make([]string, len(conf.Clusters))
-	for name := range conf.Clusters {
-		names[idx] = name
-		idx++
-	}
+	for name, cluster := range conf.Clusters {
+		reachable := "no"
+		current := "no"
 
-	slices.Sort(names)
-
-	for idx, name := range names {
-		current := name == "default" || name == conf.CurrentCluster
-		cluster := conf.Clusters[name]
-
-		_, err := cluster.ES.Cluster.Health().
-			Header("content-type", "application/json").
-			Header("accept", "application/json").
+		_, err := cluster.ES().Cluster.Health().
 			Do(context.Background())
 
 		if err == nil {
-			name = printer.Colorize(conf, "green", name)
+			reachable = printer.Colorize(conf, "green", "reachable")
 		}
 
-		table.Entries[idx] = []string{name, cluster.Uri, fmt.Sprintf("%t", current)}
+		if cluster.Default {
+			current = printer.Colorize(conf, "green", "yes")
+
+			if err != nil {
+				reachable = printer.Colorize(conf, "red", "no")
+			}
+		}
+
+		table.Entries[idx] = []string{name, cluster.Uri, reachable, current}
+		idx++
 	}
 
+	table.Sort()
+
 	if err := table.Print(); err != nil {
 		return err
 	}
@@ -114,9 +114,9 @@ func ClusterStatus(conf *cfg.Config) error {
 	}
 
 	for _, cluster := range clusters {
-		es := conf.DefaultCluster.ES
+		es := conf.DefaultCluster.ES()
 		if cluster != "default" {
-			es = conf.Clusters[cluster].ES
+			es = conf.Clusters[cluster].ES()
 		}
 
 		responses := make(chan apiResponse, gocount)