/*
Copyright 2023 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package network

import (
	"context"

	"github.com/onsi/ginkgo/v2"
	v1 "k8s.io/api/core/v1"
	networkingv1alpha1 "k8s.io/api/networking/v1alpha1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/util/intstr"
	"k8s.io/apimachinery/pkg/util/wait"
	clientset "k8s.io/client-go/kubernetes"
	"k8s.io/kubernetes/test/e2e/feature"
	"k8s.io/kubernetes/test/e2e/framework"
	e2enode "k8s.io/kubernetes/test/e2e/framework/node"
	e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
	e2eservice "k8s.io/kubernetes/test/e2e/framework/service"
	e2eskipper "k8s.io/kubernetes/test/e2e/framework/skipper"
	"k8s.io/kubernetes/test/e2e/network/common"
	admissionapi "k8s.io/pod-security-admission/api"
)

var _ = common.SIGDescribe(feature.ServiceCIDRs, func() {

	fr := framework.NewDefaultFramework("servicecidrs")
	fr.NamespacePodSecurityEnforceLevel = admissionapi.LevelPrivileged

	var (
		cs clientset.Interface
		ns string
	)

	ginkgo.BeforeEach(func(ctx context.Context) {
		cs = fr.ClientSet
		ns = fr.Namespace.Name

		nodes, err := e2enode.GetBoundedReadySchedulableNodes(ctx, cs, 2)
		framework.ExpectNoError(err)
		if len(nodes.Items) < 2 {
			e2eskipper.Skipf(
				"Test requires >= 2 Ready nodes, but there are only %v nodes",
				len(nodes.Items))
		}

	})

	ginkgo.It("should create Services and servce on different Service CIDRs", func(ctx context.Context) {
		// create a new service CIDR
		svcCIDR := &networkingv1alpha1.ServiceCIDR{
			ObjectMeta: metav1.ObjectMeta{
				Name: "test-svc-cidr",
			},
			Spec: networkingv1alpha1.ServiceCIDRSpec{
				CIDRs: []string{"10.196.196.0/24"},
			},
		}
		_, err := cs.NetworkingV1alpha1().ServiceCIDRs().Create(context.TODO(), svcCIDR, metav1.CreateOptions{})
		framework.ExpectNoError(err, "error creating ServiceCIDR")
		if pollErr := wait.PollUntilContextTimeout(ctx, framework.Poll, e2eservice.RespondingTimeout, false, func(ctx context.Context) (bool, error) {
			svcCIDR, err := cs.NetworkingV1alpha1().ServiceCIDRs().Get(ctx, svcCIDR.Name, metav1.GetOptions{})
			if err != nil {
				return false, nil
			}
			return isReady(svcCIDR), nil
		}); pollErr != nil {
			framework.Failf("Failed to wait for serviceCIDR to be ready: %v", pollErr)
		}

		serviceName := "cidr1-test"
		jig := e2eservice.NewTestJig(cs, ns, serviceName)

		ginkgo.By("creating service " + serviceName + " with type=NodePort in namespace " + ns)
		nodePortService, err := jig.CreateTCPService(ctx, func(svc *v1.Service) {
			svc.Spec.ClusterIP = "10.196.196.77"
			svc.Spec.Type = v1.ServiceTypeNodePort
			svc.Spec.Ports = []v1.ServicePort{
				{Port: 80, Name: "http", Protocol: v1.ProtocolTCP, TargetPort: intstr.FromInt(9376)},
			}
		})
		framework.ExpectNoError(err)
		err = jig.CreateServicePods(ctx, 2)
		framework.ExpectNoError(err)
		execPod := e2epod.CreateExecPodOrFail(ctx, cs, ns, "execpod", nil)
		err = jig.CheckServiceReachability(ctx, nodePortService, execPod)
		framework.ExpectNoError(err)
	})

})

func isReady(serviceCIDR *networkingv1alpha1.ServiceCIDR) bool {
	if serviceCIDR == nil {
		return false
	}

	for _, condition := range serviceCIDR.Status.Conditions {
		if condition.Type == string(networkingv1alpha1.ServiceCIDRConditionReady) {
			return condition.Status == metav1.ConditionStatus(metav1.ConditionTrue)
		}
	}
	return false
}