/*
Copyright 2016 The Kubernetes Authors.

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 e2e

import (
	"fmt"
	"strings"
	"time"

	"k8s.io/kubernetes/federation/client/clientset_generated/federation_release_1_4"
	"k8s.io/kubernetes/federation/pkg/federation-controller/util"
	"k8s.io/kubernetes/pkg/api"
	"k8s.io/kubernetes/pkg/api/errors"
	api_v1 "k8s.io/kubernetes/pkg/api/v1"
	"k8s.io/kubernetes/pkg/util/wait"
	"k8s.io/kubernetes/test/e2e/framework"

	. "github.com/onsi/ginkgo"
)

const (
	namespacePrefix = "e2e-namespace-test-"
)

// Create/delete ingress api objects
var _ = framework.KubeDescribe("Federation namespace [Feature:Federation]", func() {
	f := framework.NewDefaultFederatedFramework("federation-namespace")
	clusterClientSet := make(map[string]*federation_release_1_4.Clientset)

	Describe("Namespace objects", func() {
		BeforeEach(func() {
			framework.SkipUnlessFederated(f.Client)
			clusters := buildClustersOrFail_14(f)
			for _, cluster := range clusters {
				if _, found := clusterClientSet[cluster.Name]; !found {
					clientset, err := util.GetClientsetForCluster(cluster)
					if err != nil {
						framework.Failf("Failed to create client for %s: %v", cluster.Name, err)
					}
					clusterClientSet[cluster.Name] = clientset
				}
			}
		})

		AfterEach(func() {
			framework.SkipUnlessFederated(f.Client)
			deleteAllTestNamespaces(f.FederationClientset_1_4)
			for _, clientset := range clusterClientSet {
				deleteAllTestNamespaces(clientset)
			}
		})

		It("should be created and deleted successfully", func() {
			framework.SkipUnlessFederated(f.Client)

			ns := api_v1.Namespace{
				ObjectMeta: api_v1.ObjectMeta{
					Name: api.SimpleNameGenerator.GenerateName(namespacePrefix),
				},
			}
			By(fmt.Sprintf("Creating namespace %s", ns.Name))
			_, err := f.FederationClientset_1_4.Core().Namespaces().Create(&ns)
			framework.ExpectNoError(err, "Failed to create namespace %s", ns.Name)

			// Check subclusters if the namespace was create there.
			err = wait.Poll(5*time.Second, 2*time.Minute, func() (bool, error) {
				for _, client := range clusterClientSet {
					_, err := client.Core().Namespaces().Get(ns.Name)
					if err != nil && !errors.IsNotFound(err) {
						return false, err
					}
					if err != nil {
						return false, nil
					}
				}
				return true, nil
			})
			framework.ExpectNoError(err, "Not all namespaces created")

			err = f.FederationClientset_1_4.Core().Namespaces().Delete(ns.Name, &api.DeleteOptions{})
			framework.ExpectNoError(err, "Failed to delete namespace %s", ns.Name)
		})
	})
})

func deleteAllTestNamespaces(clientset *federation_release_1_4.Clientset) {
	list, err := clientset.Core().Namespaces().List(api.ListOptions{})
	if err != nil {
		framework.Failf("Failed to get all namespaes: %v", err)
		return
	}
	for _, namespace := range list.Items {
		if strings.HasPrefix(namespace.Name, namespacePrefix) {
			err := clientset.Core().Namespaces().Delete(namespace.Name, &api.DeleteOptions{})
			if err != nil {
				framework.Failf("Failed to delete %s: %v", namespace.Name, err)
			}
		}
	}
}