// Copyright 2020-2023 Project Capsule Authors.
// SPDX-License-Identifier: Apache-2.0

package e2e

import (
	"context"

	. "github.com/onsi/ginkgo/v2"
	. "github.com/onsi/gomega"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"sigs.k8s.io/controller-runtime/pkg/client"

	capsulev1beta2 "github.com/projectcapsule/capsule/api/v1beta2"
	"github.com/projectcapsule/capsule/pkg/api/meta"
	"github.com/projectcapsule/capsule/pkg/api/rbac"
)

var _ = Describe("creating a Namespace with a protected Namespace regex enabled", Ordered, Label("config", "namespace"), func() {
	originConfig := &capsulev1beta2.CapsuleConfiguration{}

	tnt := &capsulev1beta2.Tenant{
		ObjectMeta: metav1.ObjectMeta{
			Name: "e2e-protected-namespace",
			Labels: map[string]string{
				"env": "e2e",
			},
		},
		Spec: capsulev1beta2.TenantSpec{
			Owners: rbac.OwnerListSpec{
				{
					CoreOwnerSpec: rbac.CoreOwnerSpec{
						UserSpec: rbac.UserSpec{
							Name: "e2e-protected-namespace",
							Kind: "User",
						},
					},
				},
			},
		},
	}

	JustBeforeEach(func() {
		Expect(k8sClient.Get(context.Background(), client.ObjectKey{Name: defaultConfigurationName}, originConfig)).To(Succeed())

		EventuallyCreation(func() error {
			tnt.ResourceVersion = ""
			return k8sClient.Create(context.TODO(), tnt)
		}).Should(Succeed())
		TenantReady(tnt, metav1.ConditionTrue, defaultTimeoutInterval)
	})
	JustAfterEach(func() {
		EventuallyDeletion(tnt)

		// Restore Configuration
		Eventually(func() error {
			c := &capsulev1beta2.CapsuleConfiguration{}
			if err := k8sClient.Get(context.Background(), client.ObjectKey{Name: originConfig.Name}, c); err != nil {
				return err
			}
			// Apply the initial configuration from originConfig to c
			c.Spec = originConfig.Spec
			return k8sClient.Update(context.Background(), c)
		}, defaultTimeoutInterval, defaultPollInterval).Should(Succeed())
	})

	It("should succeed and be available in Tenant namespaces list", func() {
		ModifyCapsuleConfigurationOpts(func(configuration *capsulev1beta2.CapsuleConfiguration) {
			configuration.Spec.ProtectedNamespaceRegexpString = `^.*[-.]system$`
		})

		ns := NewNamespace("e2e-protected-namespace-ok", map[string]string{
			meta.TenantLabel: tnt.GetName(),
		})

		NamespaceCreation(ns, tnt.Spec.Owners[0].UserSpec, defaultTimeoutInterval).Should(Succeed())
		NamespaceIsPartOfTenant(tnt, ns).Should(Succeed())
	})

	It("should fail using a value non matching the regex", func() {
		ns := NewNamespace("e2e-protected-namespace-system", map[string]string{
			meta.TenantLabel: tnt.GetName(),
		})
		NamespaceCreation(ns, tnt.Spec.Owners[0].UserSpec, defaultTimeoutInterval).ShouldNot(Succeed())
		NamespaceIsPartOfTenant(tnt, ns).Should(Succeed())

		ModifyCapsuleConfigurationOpts(func(configuration *capsulev1beta2.CapsuleConfiguration) {
			configuration.Spec.ProtectedNamespaceRegexpString = ""
		})
	})

	It("should reject malformed protected namespace regex", func() {
		ExpectCapsuleConfigurationUpdateDenied(
			func(configuration *capsulev1beta2.CapsuleConfiguration) {
				configuration.Spec.ProtectedNamespaceRegexpString = "["
			},
			"spec.protectedNamespaceRegex",
			"[",
			"not a valid regular expression",
		)
	})
})