// Copyright (c) 2020 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://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 cidr_test

import (
	. "github.com/gardener/gardener/pkg/utils/validation/cidr"

	"k8s.io/apimachinery/pkg/util/validation/field"

	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
	. "github.com/onsi/gomega/gstruct"
)

var _ = Describe("utils", func() {
	Describe("#ValidateNetworkDisjointedness", func() {
		var (
			seedPodsCIDR     = "10.241.128.0/17"
			seedServicesCIDR = "10.241.0.0/17"
			seedNodesCIDR    = "10.240.0.0/16"
		)

		It("should pass the validation", func() {
			var (
				podsCIDR     = "10.242.128.0/17"
				servicesCIDR = "10.242.0.0/17"
				nodesCIDR    = "10.241.0.0/16"
			)

			errorList := ValidateNetworkDisjointedness(
				field.NewPath(""),
				&nodesCIDR,
				&podsCIDR,
				&servicesCIDR,
				&seedNodesCIDR,
				seedPodsCIDR,
				seedServicesCIDR,
			)

			Expect(errorList).To(BeEmpty())
		})

		It("should fail due to disjointedness", func() {
			var (
				podsCIDR     = seedPodsCIDR
				servicesCIDR = seedServicesCIDR
				nodesCIDR    = seedNodesCIDR
			)

			errorList := ValidateNetworkDisjointedness(
				field.NewPath(""),
				&nodesCIDR,
				&podsCIDR,
				&servicesCIDR,
				&seedNodesCIDR,
				seedPodsCIDR,
				seedServicesCIDR,
			)

			Expect(errorList).To(ConsistOf(PointTo(MatchFields(IgnoreExtras, Fields{
				"Type":  Equal(field.ErrorTypeInvalid),
				"Field": Equal("[].nodes"),
			})), PointTo(MatchFields(IgnoreExtras, Fields{
				"Type":  Equal(field.ErrorTypeInvalid),
				"Field": Equal("[].services"),
			})), PointTo(MatchFields(IgnoreExtras, Fields{
				"Type":  Equal(field.ErrorTypeInvalid),
				"Field": Equal("[].pods"),
			}))))
		})

		It("should fail due to disjointedness of service and pod networks", func() {
			var (
				podsCIDR     = seedServicesCIDR
				servicesCIDR = seedPodsCIDR
				nodesCIDR    = "10.242.128.0/17"
			)

			errorList := ValidateNetworkDisjointedness(
				field.NewPath(""),
				&nodesCIDR,
				&podsCIDR,
				&servicesCIDR,
				&seedNodesCIDR,
				seedPodsCIDR,
				seedServicesCIDR,
			)

			Expect(errorList).To(ConsistOf(PointTo(MatchFields(IgnoreExtras, Fields{
				"Type":  Equal(field.ErrorTypeInvalid),
				"Field": Equal("[].services"),
			})), PointTo(MatchFields(IgnoreExtras, Fields{
				"Type":  Equal(field.ErrorTypeInvalid),
				"Field": Equal("[].pods"),
			}))),
			)
		})

		It("should fail due to missing fields", func() {
			errorList := ValidateNetworkDisjointedness(
				field.NewPath(""),
				nil,
				nil,
				nil,
				&seedNodesCIDR,
				seedPodsCIDR,
				seedServicesCIDR,
			)

			Expect(errorList).To(ConsistOf(
				PointTo(MatchFields(IgnoreExtras, Fields{
					"Type":  Equal(field.ErrorTypeRequired),
					"Field": Equal("[].services"),
				})),
				PointTo(MatchFields(IgnoreExtras, Fields{
					"Type":  Equal(field.ErrorTypeRequired),
					"Field": Equal("[].pods"),
				})),
			))
		})
	})
})