/*
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 set

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"net/http"
	"path"
	"strings"
	"testing"

	"github.com/stretchr/testify/assert"
	appsv1 "k8s.io/api/apps/v1"
	appsv1beta1 "k8s.io/api/apps/v1beta1"
	appsv1beta2 "k8s.io/api/apps/v1beta2"
	batchv1 "k8s.io/api/batch/v1"
	"k8s.io/api/core/v1"
	extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/runtime/schema"
	restclient "k8s.io/client-go/rest"
	"k8s.io/client-go/rest/fake"
	"k8s.io/kubernetes/pkg/api/legacyscheme"
	"k8s.io/kubernetes/pkg/api/testapi"
	cmdtesting "k8s.io/kubernetes/pkg/kubectl/cmd/testing"
	"k8s.io/kubernetes/pkg/kubectl/resource"
	"k8s.io/kubernetes/pkg/kubectl/scheme"
)

func TestImageLocal(t *testing.T) {
	tf := cmdtesting.NewTestFactory()
	ns := legacyscheme.Codecs

	tf.Client = &fake.RESTClient{
		GroupVersion:         schema.GroupVersion{Version: ""},
		NegotiatedSerializer: ns,
		Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
			t.Fatalf("unexpected request: %s %#v\n%#v", req.Method, req.URL, req)
			return nil, nil
		}),
	}
	tf.Namespace = "test"
	tf.ClientConfigVal = &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: &schema.GroupVersion{Version: ""}}}

	buf := bytes.NewBuffer([]byte{})
	cmd := NewCmdImage(tf, buf, buf)
	cmd.SetOutput(buf)
	cmd.Flags().Set("output", "name")
	cmd.Flags().Set("local", "true")

	opts := ImageOptions{FilenameOptions: resource.FilenameOptions{
		Filenames: []string{"../../../../test/e2e/testing-manifests/statefulset/cassandra/controller.yaml"}},
		Out:   buf,
		Local: true}
	err := opts.Complete(tf, cmd, []string{"cassandra=thingy"})
	if err == nil {
		err = opts.Validate()
	}
	if err == nil {
		err = opts.Run()
	}
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if !strings.Contains(buf.String(), "replicationcontroller/cassandra") {
		t.Errorf("did not set image: %s", buf.String())
	}
}

func TestSetImageValidation(t *testing.T) {
	testCases := []struct {
		name         string
		imageOptions *ImageOptions
		expectErr    string
	}{
		{
			name:         "test resource < 1 and filenames empty",
			imageOptions: &ImageOptions{},
			expectErr:    "[one or more resources must be specified as <resource> <name> or <resource>/<name>, at least one image update is required]",
		},
		{
			name: "test containerImages < 1",
			imageOptions: &ImageOptions{
				Resources: []string{"a", "b", "c"},

				FilenameOptions: resource.FilenameOptions{
					Filenames: []string{"testFile"},
				},
			},
			expectErr: "at least one image update is required",
		},
		{
			name: "test containerImages > 1 and all containers are already specified by *",
			imageOptions: &ImageOptions{
				Resources: []string{"a", "b", "c"},
				FilenameOptions: resource.FilenameOptions{
					Filenames: []string{"testFile"},
				},
				ContainerImages: map[string]string{
					"test": "test",
					"*":    "test",
				},
			},
			expectErr: "all containers are already specified by *, but saw more than one container_name=container_image pairs",
		},
		{
			name: "success case",
			imageOptions: &ImageOptions{
				Resources: []string{"a", "b", "c"},
				FilenameOptions: resource.FilenameOptions{
					Filenames: []string{"testFile"},
				},
				ContainerImages: map[string]string{
					"test": "test",
				},
			},
			expectErr: "",
		},
	}
	for _, testCase := range testCases {
		err := testCase.imageOptions.Validate()
		if err != nil {
			if err.Error() != testCase.expectErr {
				t.Errorf("[%s]:expect err:%s got err:%s", testCase.name, testCase.expectErr, err.Error())
			}
		}
		if err == nil && (testCase.expectErr != "") {
			t.Errorf("[%s]:expect err:%s got err:%v", testCase.name, testCase.expectErr, err)
		}
	}
}

func TestSetMultiResourcesImageLocal(t *testing.T) {
	tf := cmdtesting.NewTestFactory()
	ns := legacyscheme.Codecs

	tf.Client = &fake.RESTClient{
		GroupVersion:         schema.GroupVersion{Version: ""},
		NegotiatedSerializer: ns,
		Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
			t.Fatalf("unexpected request: %s %#v\n%#v", req.Method, req.URL, req)
			return nil, nil
		}),
	}
	tf.Namespace = "test"
	tf.ClientConfigVal = &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: &schema.GroupVersion{Version: ""}}}

	buf := bytes.NewBuffer([]byte{})
	cmd := NewCmdImage(tf, buf, buf)
	cmd.SetOutput(buf)
	cmd.Flags().Set("output", "name")
	cmd.Flags().Set("local", "true")

	opts := ImageOptions{FilenameOptions: resource.FilenameOptions{
		Filenames: []string{"../../../../test/fixtures/pkg/kubectl/cmd/set/multi-resource-yaml.yaml"}},
		Out:   buf,
		Local: true}
	err := opts.Complete(tf, cmd, []string{"*=thingy"})
	if err == nil {
		err = opts.Validate()
	}
	if err == nil {
		err = opts.Run()
	}
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	expectedOut := "replicationcontroller/first-rc\nreplicationcontroller/second-rc\n"
	if buf.String() != expectedOut {
		t.Errorf("expected out:\n%s\nbut got:\n%s", expectedOut, buf.String())
	}
}

func TestSetImageRemote(t *testing.T) {
	inputs := []struct {
		object                          runtime.Object
		apiPrefix, apiGroup, apiVersion string
		testAPIGroup                    string
		args                            []string
	}{
		{
			object: &extensionsv1beta1.ReplicaSet{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: extensionsv1beta1.ReplicaSetSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "extensions",
			apiPrefix:    "/apis", apiGroup: "extensions", apiVersion: "v1beta1",
			args: []string{"replicaset", "nginx", "*=thingy"},
		},
		{
			object: &appsv1beta2.ReplicaSet{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: appsv1beta2.ReplicaSetSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "extensions",
			apiPrefix:    "/apis", apiGroup: "apps", apiVersion: "v1beta2",
			args: []string{"replicaset", "nginx", "*=thingy"},
		},
		{
			object: &appsv1.ReplicaSet{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: appsv1.ReplicaSetSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "extensions",
			apiPrefix:    "/apis", apiGroup: "apps", apiVersion: "v1",
			args: []string{"replicaset", "nginx", "*=thingy"},
		},
		{
			object: &extensionsv1beta1.DaemonSet{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: extensionsv1beta1.DaemonSetSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "extensions",
			apiPrefix:    "/apis", apiGroup: "extensions", apiVersion: "v1beta1",
			args: []string{"daemonset", "nginx", "*=thingy"},
		},
		{
			object: &appsv1beta2.DaemonSet{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: appsv1beta2.DaemonSetSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "extensions",
			apiPrefix:    "/apis", apiGroup: "apps", apiVersion: "v1beta2",
			args: []string{"daemonset", "nginx", "*=thingy"},
		},
		{
			object: &appsv1.DaemonSet{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: appsv1.DaemonSetSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "extensions",
			apiPrefix:    "/apis", apiGroup: "apps", apiVersion: "v1",
			args: []string{"daemonset", "nginx", "*=thingy"},
		},
		{
			object: &extensionsv1beta1.Deployment{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: extensionsv1beta1.DeploymentSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "extensions",
			apiPrefix:    "/apis", apiGroup: "extensions", apiVersion: "v1beta1",
			args: []string{"deployment", "nginx", "*=thingy"},
		},
		{
			object: &appsv1beta1.Deployment{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: appsv1beta1.DeploymentSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "extensions",
			apiPrefix:    "/apis", apiGroup: "apps", apiVersion: "v1beta1",
			args: []string{"deployment", "nginx", "*=thingy"},
		},
		{
			object: &appsv1beta2.Deployment{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: appsv1beta2.DeploymentSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "extensions",
			apiPrefix:    "/apis", apiGroup: "apps", apiVersion: "v1beta2",
			args: []string{"deployment", "nginx", "*=thingy"},
		},
		{
			object: &appsv1.Deployment{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: appsv1.DeploymentSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "extensions",
			apiPrefix:    "/apis", apiGroup: "apps", apiVersion: "v1",
			args: []string{"deployment", "nginx", "*=thingy"},
		},
		{
			object: &appsv1beta1.StatefulSet{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: appsv1beta1.StatefulSetSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "apps",
			apiPrefix:    "/apis", apiGroup: "apps", apiVersion: "v1beta1",
			args: []string{"statefulset", "nginx", "*=thingy"},
		},
		{
			object: &appsv1beta2.StatefulSet{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: appsv1beta2.StatefulSetSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "apps",
			apiPrefix:    "/apis", apiGroup: "apps", apiVersion: "v1beta2",
			args: []string{"statefulset", "nginx", "*=thingy"},
		},
		{
			object: &appsv1.StatefulSet{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: appsv1.StatefulSetSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "apps",
			apiPrefix:    "/apis", apiGroup: "apps", apiVersion: "v1",
			args: []string{"statefulset", "nginx", "*=thingy"},
		},
		{
			object: &batchv1.Job{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: batchv1.JobSpec{
					Template: v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "batch",
			apiPrefix:    "/apis", apiGroup: "batch", apiVersion: "v1",
			args: []string{"job", "nginx", "*=thingy"},
		},
		{
			object: &v1.ReplicationController{
				ObjectMeta: metav1.ObjectMeta{Name: "nginx"},
				Spec: v1.ReplicationControllerSpec{
					Template: &v1.PodTemplateSpec{
						Spec: v1.PodSpec{
							Containers: []v1.Container{
								{
									Name:  "nginx",
									Image: "nginx",
								},
							},
						},
					},
				},
			},
			testAPIGroup: "",
			apiPrefix:    "/api", apiGroup: "", apiVersion: "v1",
			args: []string{"replicationcontroller", "nginx", "*=thingy"},
		},
	}
	for _, input := range inputs {
		groupVersion := schema.GroupVersion{Group: input.apiGroup, Version: input.apiVersion}
		testapi.Default = testapi.Groups[input.testAPIGroup]
		tf := cmdtesting.NewTestFactory()
		codec := scheme.Codecs.CodecForVersions(scheme.Codecs.LegacyCodec(groupVersion), scheme.Codecs.UniversalDecoder(groupVersion), groupVersion, groupVersion)
		ns := legacyscheme.Codecs
		tf.Namespace = "test"
		tf.Client = &fake.RESTClient{
			GroupVersion:         groupVersion,
			NegotiatedSerializer: ns,
			Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
				resourcePath := testapi.Default.ResourcePath(input.args[0]+"s", tf.Namespace, input.args[1])
				switch p, m := req.URL.Path, req.Method; {
				case p == resourcePath && m == http.MethodGet:
					return &http.Response{StatusCode: http.StatusOK, Header: defaultHeader(), Body: objBody(codec, input.object)}, nil
				case p == resourcePath && m == http.MethodPatch:
					stream, err := req.GetBody()
					if err != nil {
						return nil, err
					}
					bytes, err := ioutil.ReadAll(stream)
					if err != nil {
						return nil, err
					}
					assert.Contains(t, string(bytes), `"image":`+`"`+"thingy"+`"`, fmt.Sprintf("image not updated for %#v", input.object))
					return &http.Response{StatusCode: http.StatusOK, Header: defaultHeader(), Body: objBody(codec, input.object)}, nil
				default:
					t.Errorf("%s: unexpected request: %s %#v\n%#v", "image", req.Method, req.URL, req)
					return nil, fmt.Errorf("unexpected request")
				}
			}),
			VersionedAPIPath: path.Join(input.apiPrefix, testapi.Default.GroupVersion().String()),
		}
		out := new(bytes.Buffer)
		cmd := NewCmdImage(tf, out, out)
		cmd.SetOutput(out)
		cmd.Flags().Set("output", "yaml")
		opts := ImageOptions{
			Out:   out,
			Local: false}
		err := opts.Complete(tf, cmd, input.args)
		assert.NoError(t, err)
		err = opts.Run()
		assert.NoError(t, err)
	}
}