/*
 * This file is part of the CDI project
 *
 * 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.
 *
 * Copyright 2020 Red Hat, Inc.
 *
 */

package utils

import (
	. "github.com/onsi/ginkgo"
	. "github.com/onsi/ginkgo/extensions/table"
	. "github.com/onsi/gomega"

	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/api/resource"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"

	cdiv1 "kubevirt.io/containerized-data-importer/pkg/apis/core/v1alpha1"
)

var _ = Describe("IsWaitForFirstConsumerBeforePopulating on Alpha1", func() {

	DescribeTable("PVC with DV as owner",
		func(volumeClaimPhase corev1.PersistentVolumeClaimPhase, dataVolumePhase cdiv1.DataVolumePhase, expectedResponse bool) {

			dv := newCloneDataVolume("source-dv", "default")
			dv.Status.Phase = dataVolumePhase
			controller := true
			sourcePvc := createPvc("test", "default", volumeClaimPhase)
			sourcePvc.OwnerReferences = append(sourcePvc.OwnerReferences, metav1.OwnerReference{
				Kind:       "DataVolume",
				Controller: &controller,
				Name:       "source-dv",
			})
			res, err := IsWaitForFirstConsumerBeforePopulating(sourcePvc,
				func(name, namespace string) (*cdiv1.DataVolume, error) {
					return dv, nil
				})
			Expect(err).ToNot(HaveOccurred())
			Expect(res).To(BeEquivalentTo(expectedResponse))
		},
		Entry("PVC Pending, dv is in WFFC phase", corev1.ClaimPending, cdiv1.WaitForFirstConsumer, true),
		Entry("PVC Pending, dv is NOT in WFFC phase", corev1.ClaimPending, cdiv1.Pending, false),
		Entry("PVC Bound, dv is still in WFFC phase", corev1.ClaimBound, cdiv1.WaitForFirstConsumer, true),
		Entry("PVC Bound, dv is NOT in WFFC phase", corev1.ClaimBound, cdiv1.PhaseUnset, false),
	)

	It("Should return false if source has no ownerRef", func() {
		sourcePvc := createPvc("test", "default", corev1.ClaimPending)
		res, err := IsWaitForFirstConsumerBeforePopulating(sourcePvc,
			func(name, namespace string) (*cdiv1.DataVolume, error) {
				Fail("getDv should never be executed")
				return nil, nil
			})
		Expect(err).ToNot(HaveOccurred())
		Expect(res).To(BeFalse())
	})
})

func createPvc(name, ns string, claimPhase corev1.PersistentVolumeClaimPhase) *corev1.PersistentVolumeClaim {
	return &corev1.PersistentVolumeClaim{
		ObjectMeta: metav1.ObjectMeta{
			Name:      name,
			Namespace: ns,
			UID:       types.UID(ns + "-" + name),
		},
		Spec: corev1.PersistentVolumeClaimSpec{
			AccessModes: []corev1.PersistentVolumeAccessMode{corev1.ReadOnlyMany, corev1.ReadWriteOnce},
			Resources: corev1.ResourceRequirements{
				Requests: corev1.ResourceList{
					corev1.ResourceName(corev1.ResourceStorage): resource.MustParse("1G"),
				},
			},
		},
		Status: corev1.PersistentVolumeClaimStatus{
			Phase: claimPhase,
		},
	}
}

func newCloneDataVolume(name string, pvcNamespace string) *cdiv1.DataVolume {
	var annCloneToken = "cdi.kubevirt.io/storage.clone.token"
	return &cdiv1.DataVolume{
		TypeMeta: metav1.TypeMeta{APIVersion: cdiv1.SchemeGroupVersion.String()},
		ObjectMeta: metav1.ObjectMeta{
			Name:      name,
			Namespace: metav1.NamespaceDefault,
			Annotations: map[string]string{
				annCloneToken: "foobar",
			},
		},
		Spec: cdiv1.DataVolumeSpec{
			Source: cdiv1.DataVolumeSource{
				PVC: &cdiv1.DataVolumeSourcePVC{
					Name:      "test",
					Namespace: pvcNamespace,
				},
			},
			PVC: &corev1.PersistentVolumeClaimSpec{},
		},
	}
}
