/*
Copyright The Helm 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 action

import (
	"flag"
	"io"
	"io/ioutil"
	"testing"
	"time"

	"github.com/pkg/errors"
	fakeclientset "k8s.io/client-go/kubernetes/fake"

	"helm.sh/helm/pkg/chart"
	"helm.sh/helm/pkg/chartutil"
	"helm.sh/helm/pkg/kube"
	"helm.sh/helm/pkg/release"
	"helm.sh/helm/pkg/storage"
	"helm.sh/helm/pkg/storage/driver"
)

var verbose = flag.Bool("test.log", false, "enable test logging")

func actionConfigFixture(t *testing.T) *Configuration {
	t.Helper()

	return &Configuration{
		Releases:     storage.Init(driver.NewMemory()),
		KubeClient:   &kube.PrintingKubeClient{Out: ioutil.Discard},
		Capabilities: chartutil.DefaultCapabilities,
		Log: func(format string, v ...interface{}) {
			t.Helper()
			if *verbose {
				t.Logf(format, v...)
			}
		},
	}
}

var manifestWithHook = `kind: ConfigMap
metadata:
  name: test-cm
  annotations:
    "helm.sh/hook": post-install,pre-delete
data:
  name: value`

var manifestWithTestHook = `kind: Pod
  metadata:
	name: finding-nemo,
	annotations:
	  "helm.sh/hook": test-success
  spec:
	containers:
	- name: nemo-test
	  image: fake-image
	  cmd: fake-command
  `

type chartOptions struct {
	*chart.Chart
}

type chartOption func(*chartOptions)

func buildChart(opts ...chartOption) *chart.Chart {
	c := &chartOptions{
		Chart: &chart.Chart{
			// TODO: This should be more complete.
			Metadata: &chart.Metadata{
				Name: "hello",
			},
			// This adds a basic template and hooks.
			Templates: []*chart.File{
				{Name: "templates/hello", Data: []byte("hello: world")},
				{Name: "templates/hooks", Data: []byte(manifestWithHook)},
			},
		},
	}

	for _, opt := range opts {
		opt(c)
	}

	return c.Chart
}

func withNotes(notes string) chartOption {
	return func(opts *chartOptions) {
		opts.Templates = append(opts.Templates, &chart.File{
			Name: "templates/NOTES.txt",
			Data: []byte(notes),
		})
	}
}

func withDependency(dependencyOpts ...chartOption) chartOption {
	return func(opts *chartOptions) {
		opts.AddDependency(buildChart(dependencyOpts...))
	}
}

func withSampleTemplates() chartOption {
	return func(opts *chartOptions) {
		sampleTemplates := []*chart.File{
			// This adds basic templates and partials.
			{Name: "templates/goodbye", Data: []byte("goodbye: world")},
			{Name: "templates/empty", Data: []byte("")},
			{Name: "templates/with-partials", Data: []byte(`hello: {{ template "_planet" . }}`)},
			{Name: "templates/partials/_planet", Data: []byte(`{{define "_planet"}}Earth{{end}}`)},
		}
		opts.Templates = append(opts.Templates, sampleTemplates...)
	}
}

func withKube(version string) chartOption {
	return func(opts *chartOptions) {
		opts.Metadata.KubeVersion = version
	}
}

// releaseStub creates a release stub, complete with the chartStub as its chart.
func releaseStub() *release.Release {
	return namedReleaseStub("angry-panda", release.StatusDeployed)
}

func namedReleaseStub(name string, status release.Status) *release.Release {
	now := time.Now()
	return &release.Release{
		Name: name,
		Info: &release.Info{
			FirstDeployed: now,
			LastDeployed:  now,
			Status:        status,
			Description:   "Named Release Stub",
		},
		Chart:   buildChart(withSampleTemplates()),
		Config:  map[string]interface{}{"name": "value"},
		Version: 1,
		Hooks: []*release.Hook{
			{
				Name:     "test-cm",
				Kind:     "ConfigMap",
				Path:     "test-cm",
				Manifest: manifestWithHook,
				Events: []release.HookEvent{
					release.HookPostInstall,
					release.HookPreDelete,
				},
			},
			{
				Name:     "finding-nemo",
				Kind:     "Pod",
				Path:     "finding-nemo",
				Manifest: manifestWithTestHook,
				Events: []release.HookEvent{
					release.HookReleaseTestSuccess,
				},
			},
		},
	}
}

func newHookFailingKubeClient() *hookFailingKubeClient {
	return &hookFailingKubeClient{
		PrintingKubeClient: kube.PrintingKubeClient{Out: ioutil.Discard},
	}
}

type hookFailingKubeClient struct {
	kube.PrintingKubeClient
}

func (h *hookFailingKubeClient) WatchUntilReady(r io.Reader, timeout time.Duration) error {
	return errors.New("Failed watch")
}

func TestGetVersionSet(t *testing.T) {
	client := fakeclientset.NewSimpleClientset()

	vs, err := GetVersionSet(client.Discovery())
	if err != nil {
		t.Error(err)
	}

	if !vs.Has("v1") {
		t.Errorf("Expected supported versions to at least include v1.")
	}
	if vs.Has("nosuchversion/v1") {
		t.Error("Non-existent version is reported found.")
	}
}