// Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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://wwr.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 worker_test

import (
	extensionscontroller "github.com/gardener/gardener/extensions/pkg/controller"
	. "github.com/gardener/gardener/extensions/pkg/controller/worker"

	gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
	extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
	. "github.com/onsi/ginkgo"
	. "github.com/onsi/ginkgo/extensions/table"
	. "github.com/onsi/gomega"
	"github.com/onsi/gomega/types"
	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/util/intstr"
)

var _ = Describe("Machines", func() {
	Context("MachineDeployment", func() {
		DescribeTable("#HasDeployment",
			func(machineDeployments MachineDeployments, name string, expectation bool) {
				Expect(machineDeployments.HasDeployment(name)).To(Equal(expectation))
			},

			Entry("list is nil", nil, "foo", false),
			Entry("empty list", MachineDeployments{}, "foo", false),
			Entry("entry not found", MachineDeployments{{Name: "bar"}}, "foo", false),
			Entry("entry exists", MachineDeployments{{Name: "bar"}}, "bar", true),
		)

		DescribeTable("#HasClass",
			func(machineDeployments MachineDeployments, class string, expectation bool) {
				Expect(machineDeployments.HasClass(class)).To(Equal(expectation))
			},

			Entry("list is nil", nil, "foo", false),
			Entry("empty list", MachineDeployments{}, "foo", false),
			Entry("entry not found", MachineDeployments{{ClassName: "bar"}}, "foo", false),
			Entry("entry exists", MachineDeployments{{ClassName: "bar"}}, "bar", true),
		)

		DescribeTable("#HasSecret",
			func(machineDeployments MachineDeployments, secret string, expectation bool) {
				Expect(machineDeployments.HasSecret(secret)).To(Equal(expectation))
			},

			Entry("list is nil", nil, "foo", false),
			Entry("empty list", MachineDeployments{}, "foo", false),
			Entry("entry not found", MachineDeployments{{SecretName: "bar"}}, "foo", false),
			Entry("entry exists", MachineDeployments{{SecretName: "bar"}}, "bar", true),
		)
	})

	Describe("#WorkerPoolHash", func() {
		var (
			volumeType = "fast"
			pool       = extensionsv1alpha1.WorkerPool{
				Name:        "test-worker",
				MachineType: "foo",
				MachineImage: extensionsv1alpha1.MachineImage{
					Name:    "bar",
					Version: "baz",
				},
				ProviderConfig: &runtime.RawExtension{
					Raw: []byte("foo"),
				},
				Volume: &extensionsv1alpha1.Volume{
					Type: &volumeType,
					Size: "20Gi",
				},
			}
			cluster = &extensionscontroller.Cluster{
				Shoot: &gardencorev1beta1.Shoot{
					Spec: gardencorev1beta1.ShootSpec{
						Kubernetes: gardencorev1beta1.Kubernetes{
							Version: "1.2.3",
						},
					},
				},
			}

			hash, _ = WorkerPoolHash(pool, cluster)
		)

		var (
			p   *extensionsv1alpha1.WorkerPool
			v   string
			err error
		)

		BeforeEach(func() {
			p = pool.DeepCopy()
		})

		Context("hash value should not change", func() {
			AfterEach(func() {
				Expect(err).NotTo(HaveOccurred())
				Expect(v).To(Equal(hash))
			})

			It("when changing minimum", func() {
				p.Minimum = 1
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing maximum", func() {
				p.Maximum = 2
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing max surge", func() {
				p.MaxSurge.StrVal = "new-val"
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing max unavailable", func() {
				p.MaxUnavailable.StrVal = "new-val"
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing annotations", func() {
				p.Annotations = map[string]string{"foo": "bar"}
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing labels", func() {
				p.Labels = map[string]string{"foo": "bar"}
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing taints", func() {
				p.Taints = []corev1.Taint{{Key: "foo"}}
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing name", func() {
				p.Name = "different-name"
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing user-data", func() {
				p.UserData = []byte("new-data")
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing zones", func() {
				p.Zones = []string{"1"}
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing the kubernetes patch version", func() {
				v, err = WorkerPoolHash(*p, &extensionscontroller.Cluster{
					Shoot: &gardencorev1beta1.Shoot{
						Spec: gardencorev1beta1.ShootSpec{
							Kubernetes: gardencorev1beta1.Kubernetes{
								Version: "1.2.4",
							},
						},
					},
				})
			})
		})

		Context("hash value should change", func() {
			AfterEach(func() {
				Expect(err).NotTo(HaveOccurred())
				Expect(v).NotTo(Equal(hash))
			})

			It("when changing machine type", func() {
				p.MachineType = "small"
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing machine image name", func() {
				p.MachineImage.Name = "new-image"
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing machine image version", func() {
				p.MachineImage.Version = "new-version"
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing volume type", func() {
				t := "xl"
				p.Volume.Type = &t
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing volume size", func() {
				p.Volume.Size = "100Mi"
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing provider config", func() {
				p.ProviderConfig.Raw = nil
				v, err = WorkerPoolHash(*p, cluster)
			})

			It("when changing the kubernetes major/minor version", func() {
				v, err = WorkerPoolHash(*p, &extensionscontroller.Cluster{
					Shoot: &gardencorev1beta1.Shoot{
						Spec: gardencorev1beta1.ShootSpec{
							Kubernetes: gardencorev1beta1.Kubernetes{
								Version: "1.3.3",
							},
						},
					},
				})
			})

			It("when adding additionalData", func() {
				v, err = WorkerPoolHash(*p, cluster, "some-additional-data")
			})

			It("when changing the CRI configurations", func() {
				v, err = WorkerPoolHash(*p, &extensionscontroller.Cluster{
					Shoot: &gardencorev1beta1.Shoot{
						Spec: gardencorev1beta1.ShootSpec{
							Kubernetes: gardencorev1beta1.Kubernetes{
								Version: "1.2.4",
							},
							Provider: gardencorev1beta1.Provider{Workers: []gardencorev1beta1.Worker{
								{Name: "test-worker", CRI: &gardencorev1beta1.CRI{Name: gardencorev1beta1.CRINameContainerD}}}},
						},
					},
				})
			})
		})
	})

	DescribeTable("#DistributeOverZones",
		func(zoneIndex, size, zoneSize, expectation int) {
			Expect(DistributeOverZones(int32(zoneIndex), int32(size), int32(zoneSize))).To(Equal(int32(expectation)))
		},

		Entry("one zone, size 5", 0, 5, 1, 5),
		Entry("two zones, size 5, first index", 0, 5, 2, 3),
		Entry("two zones, size 5, second index", 1, 5, 2, 2),
		Entry("two zones, size 6, first index", 0, 6, 2, 3),
		Entry("two zones, size 6, second index", 1, 6, 2, 3),
		Entry("three zones, size 9, first index", 0, 9, 3, 3),
		Entry("three zones, size 9, second index", 1, 9, 3, 3),
		Entry("three zones, size 9, third index", 2, 9, 3, 3),
		Entry("three zones, size 10, first index", 0, 10, 3, 4),
		Entry("three zones, size 10, second index", 1, 10, 3, 3),
		Entry("three zones, size 10, third index", 2, 10, 3, 3),
	)

	DescribeTable("#DistributePercentOverZones",
		func(zoneIndex int, percent string, zoneSize, total int, expectation string) {
			Expect(DistributePercentOverZones(int32(zoneIndex), percent, int32(zoneSize), int32(total))).To(Equal(expectation))
		},

		Entry("even size, size 2", 0, "10%", 2, 8, "10%"),
		Entry("even size, size 2", 1, "50%", 2, 2, "50%"),
		Entry("uneven size, size 2", 0, "50%", 2, 5, "60%"),
		Entry("uneven size, size 2", 1, "50%", 2, 5, "40%"),
		Entry("uneven size, size 3", 0, "75%", 3, 5, "90%"),
		Entry("uneven size, size 3", 1, "75%", 3, 5, "90%"),
		Entry("uneven size, size 3", 2, "75%", 3, 5, "45%"),
	)

	DescribeTable("#DistributePositiveIntOrPercent",
		func(zoneIndex int, intOrPercent intstr.IntOrString, zoneSize, total int, expectation intstr.IntOrString) {
			Expect(DistributePositiveIntOrPercent(int32(zoneIndex), intOrPercent, int32(zoneSize), int32(total))).To(Equal(expectation))
		},

		Entry("percent", 2, intstr.FromString("75%"), 3, 5, intstr.FromString("45%")),
		Entry("positive int", 2, intstr.FromInt(10), 3, 3, intstr.FromInt(3)),
	)

	DescribeTable("#DiskSize",
		func(size string, expectation int, errMatcher types.GomegaMatcher) {
			val, err := DiskSize(size)

			Expect(val).To(Equal(expectation))
			Expect(err).To(errMatcher)
		},

		Entry("1-digit size", "2Gi", 2, BeNil()),
		Entry("2-digit size", "20Gi", 20, BeNil()),
		Entry("3-digit size", "200Gi", 200, BeNil()),
		Entry("4-digit size", "2000Gi", 2000, BeNil()),
		Entry("non-parseable size", "foo", -1, HaveOccurred()),
	)
})