/*
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 integration_test

import (
	"fmt"

	"github.com/aws/aws-sdk-go/aws"
	appsv1 "k8s.io/api/apps/v1"
	v1 "k8s.io/api/core/v1"
	storagev1 "k8s.io/api/storage/v1"
	"k8s.io/apimachinery/pkg/api/errors"
	"k8s.io/apimachinery/pkg/api/resource"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"sigs.k8s.io/controller-runtime/pkg/client"

	"github.com/aws/karpenter-core/pkg/apis/v1alpha5"
	"github.com/aws/karpenter-core/pkg/test"
	"github.com/aws/karpenter/pkg/apis/settings"
	"github.com/aws/karpenter/pkg/apis/v1alpha1"

	awstest "github.com/aws/karpenter/pkg/test"

	. "github.com/onsi/ginkgo/v2"
)

// This test requires the EBS CSI driver to be installed
var _ = Describe("Dynamic PVC", func() {
	It("should run a pod with a dynamic persistent volume", func() {
		// Ensure that the EBS driver is installed, or we can't run the test.
		var ds appsv1.DaemonSet
		if err := env.Client.Get(env.Context, client.ObjectKey{
			Namespace: "kube-system",
			Name:      "ebs-csi-node",
		}, &ds); err != nil {
			if errors.IsNotFound(err) {
				Skip(fmt.Sprintf("skipping dynamic PVC test due to missing EBS driver %s", err))
			} else {
				Fail(fmt.Sprintf("determining EBS driver status, %s", err))
			}
		}

		provider := awstest.AWSNodeTemplate(v1alpha1.AWSNodeTemplateSpec{AWS: v1alpha1.AWS{
			SecurityGroupSelector: map[string]string{"karpenter.sh/discovery": settings.FromContext(env.Context).ClusterName},
			SubnetSelector:        map[string]string{"karpenter.sh/discovery": settings.FromContext(env.Context).ClusterName},
		}})
		provisioner := test.Provisioner(test.ProvisionerOptions{
			ProviderRef: &v1alpha5.MachineTemplateRef{Name: provider.Name}})

		storageClassName := "ebs-sc-test"
		bindMode := storagev1.VolumeBindingWaitForFirstConsumer
		sc := test.StorageClass(test.StorageClassOptions{
			ObjectMeta: metav1.ObjectMeta{
				Name: storageClassName,
			},
			Provisioner:       aws.String("ebs.csi.aws.com"),
			VolumeBindingMode: &bindMode,
		})

		pvc := test.PersistentVolumeClaim(test.PersistentVolumeClaimOptions{
			ObjectMeta: metav1.ObjectMeta{
				Name: "ebs-claim",
			},
			StorageClassName: aws.String(storageClassName),
			Resources:        v1.ResourceRequirements{Requests: v1.ResourceList{v1.ResourceStorage: resource.MustParse("5Gi")}},
		})

		pod := test.Pod(test.PodOptions{
			PersistentVolumeClaims: []string{pvc.Name},
		})

		env.ExpectCreated(provisioner, provider, sc, pvc, pod)
		env.EventuallyExpectHealthy(pod)
		env.ExpectCreatedNodeCount("==", 1)
		env.ExpectDeleted(pod)
	})
})

var _ = Describe("Static PVC", func() {
	It("should run a pod with a static persistent volume", func() {
		provider := awstest.AWSNodeTemplate(v1alpha1.AWSNodeTemplateSpec{AWS: v1alpha1.AWS{
			SecurityGroupSelector: map[string]string{"karpenter.sh/discovery": settings.FromContext(env.Context).ClusterName},
			SubnetSelector:        map[string]string{"karpenter.sh/discovery": settings.FromContext(env.Context).ClusterName},
		}})
		provisioner := test.Provisioner(test.ProvisionerOptions{
			ProviderRef: &v1alpha5.MachineTemplateRef{Name: provider.Name}})

		storageClassName := "nfs-test"
		bindMode := storagev1.VolumeBindingWaitForFirstConsumer
		sc := test.StorageClass(test.StorageClassOptions{
			ObjectMeta: metav1.ObjectMeta{
				Name: storageClassName,
			},
			VolumeBindingMode: &bindMode,
		})

		pv := test.PersistentVolume(test.PersistentVolumeOptions{
			ObjectMeta:       metav1.ObjectMeta{Name: "nfs-test-volume"},
			StorageClassName: "nfs-test",
		})

		// the server here doesn't need to actually exist for the pod to start running
		pv.Spec.NFS = &v1.NFSVolumeSource{
			Server: "fake.server",
			Path:   "/some/path",
		}
		pv.Spec.CSI = nil

		pvc := test.PersistentVolumeClaim(test.PersistentVolumeClaimOptions{
			ObjectMeta: metav1.ObjectMeta{
				Name: "nfs-claim",
			},
			StorageClassName: aws.String(storageClassName),
			VolumeName:       pv.Name,
			Resources:        v1.ResourceRequirements{Requests: v1.ResourceList{v1.ResourceStorage: resource.MustParse("5Gi")}},
		})

		pod := test.Pod(test.PodOptions{
			PersistentVolumeClaims: []string{pvc.Name},
		})

		env.ExpectCreated(provisioner, provider, sc, pv, pvc, pod)
		env.EventuallyExpectHealthy(pod)
		env.ExpectCreatedNodeCount("==", 1)
		env.ExpectDeleted(pod)
	})
})