fix: improve GetTargets function to handle empty entries and validate format

Signed-off-by: XploY04 <[email protected]>

Author: XploY04

pkg/types/types.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/litmuschaos/litmus-go/pkg/cerrors"
+	"github.com/litmuschaos/litmus-go/pkg/log"
 	"github.com/litmuschaos/litmus-go/pkg/utils/stringutils"
 
 	"github.com/litmuschaos/chaos-operator/api/litmuschaos/v1alpha1"
@@ -170,20 +171,27 @@ func GetTargets(targets string) []AppDetails {
 	}
 	t := strings.Split(targets, ";")
 	for _, k := range t {
-		val := strings.Split(strings.TrimSpace(k), ":")
+		trimmed := strings.TrimSpace(k)
+		if trimmed == "" {
+			continue
+		}
+		val := strings.Split(trimmed, ":")
+		if len(val) < 3 {
+			log.Fatalf("invalid TARGETS entry %q: expected format kind:namespace:[labels|names][:mode]", trimmed)
+		}
 		data := AppDetails{
 			Kind:           val[0],
 			Namespace:      val[1],
 			LabelMatchMode: "union",
 		}
-		
+
 		if len(val) > 3 {
 			mode := strings.TrimSpace(val[3])
 			if mode == "intersection" || mode == "union" {
 				data.LabelMatchMode = mode
 			}
 		}
-		
+
 		if strings.Contains(val[2], "=") {
 			data.Labels = parse(val[2])
 		} else {