package describe

import (
	"bytes"
	"io/ioutil"
	"reflect"
	"strings"
	"testing"
	"time"

	kapi "k8s.io/kubernetes/pkg/api"
	"k8s.io/kubernetes/pkg/api/unversioned"
	kctl "k8s.io/kubernetes/pkg/kubectl"
	"k8s.io/kubernetes/pkg/runtime"

	"github.com/openshift/origin/pkg/api"
	authorizationapi "github.com/openshift/origin/pkg/authorization/api"
	buildapi "github.com/openshift/origin/pkg/build/api"
	deployapi "github.com/openshift/origin/pkg/deploy/api"
	imageapi "github.com/openshift/origin/pkg/image/api"
	projectapi "github.com/openshift/origin/pkg/project/api"
)

// PrinterCoverageExceptions is the list of API types that do NOT have corresponding printers
// If you add something to this list, explain why it doesn't need printing.  waaaa is not a valid
// reason.
var PrinterCoverageExceptions = []reflect.Type{
	reflect.TypeOf(&imageapi.DockerImage{}),           // not a top level resource
	reflect.TypeOf(&imageapi.ImageStreamImport{}),     // normal users don't ever look at these
	reflect.TypeOf(&buildapi.BuildLog{}),              // just a marker type
	reflect.TypeOf(&buildapi.BuildLogOptions{}),       // just a marker type
	reflect.TypeOf(&deployapi.DeploymentLog{}),        // just a marker type
	reflect.TypeOf(&deployapi.DeploymentLogOptions{}), // just a marker type

	// these resources can't be "GET"ed, so we probably don't need a printer for them
	reflect.TypeOf(&authorizationapi.SubjectAccessReviewResponse{}),
	reflect.TypeOf(&authorizationapi.ResourceAccessReviewResponse{}),
	reflect.TypeOf(&authorizationapi.SubjectAccessReview{}),
	reflect.TypeOf(&authorizationapi.ResourceAccessReview{}),
	reflect.TypeOf(&authorizationapi.LocalSubjectAccessReview{}),
	reflect.TypeOf(&authorizationapi.LocalResourceAccessReview{}),
	reflect.TypeOf(&buildapi.BuildLog{}),
	reflect.TypeOf(&buildapi.BinaryBuildRequestOptions{}),
	reflect.TypeOf(&buildapi.BuildRequest{}),
	reflect.TypeOf(&buildapi.BuildLogOptions{}),
}

// MissingPrinterCoverageExceptions is the list of types that were missing printer methods when I started
// You should never add to this list
// TODO printers should be added for these types
var MissingPrinterCoverageExceptions = []reflect.Type{
	reflect.TypeOf(&deployapi.DeploymentConfigRollback{}),
	reflect.TypeOf(&imageapi.ImageStreamMapping{}),
	reflect.TypeOf(&projectapi.ProjectRequest{}),
}

func TestPrinterCoverage(t *testing.T) {
	// noHeaders, withNamespace, wide bool, showAll bool, absoluteTimestamps bool, columnLabels []string
	printer := NewHumanReadablePrinter(false, false, false, false, false, false, []string{})

main:
	for _, apiType := range kapi.Scheme.KnownTypes(api.SchemeGroupVersion) {
		if !strings.Contains(apiType.PkgPath(), "openshift/origin") {
			continue
		}

		ptrType := reflect.PtrTo(apiType)
		for _, exception := range PrinterCoverageExceptions {
			if ptrType == exception {
				continue main
			}
		}
		for _, exception := range MissingPrinterCoverageExceptions {
			if ptrType == exception {
				continue main
			}
		}

		newStructValue := reflect.New(apiType)
		newStruct := newStructValue.Interface()

		if err := printer.PrintObj(newStruct.(runtime.Object), ioutil.Discard); (err != nil) && strings.Contains(err.Error(), "error: unknown type ") {
			t.Errorf("missing printer for %v.  Check pkg/cmd/cli/describe/printer.go", apiType)
		}
	}
}

func TestPrintImageStream(t *testing.T) {
	buf := bytes.NewBuffer([]byte{})
	streams := mockStreams()

	tests := []struct {
		name        string
		stream      *imageapi.ImageStream
		expectedOut string
		expectedErr error
	}{
		{
			name:        "less than three tags",
			stream:      streams[0],
			expectedOut: "latest,other",
		},
		{
			name:        "three tags",
			stream:      streams[1],
			expectedOut: "third,latest,other",
		},
		{
			name:        "more than three tags",
			stream:      streams[2],
			expectedOut: "another,third,latest + 1 more...",
		},
	}

	for _, test := range tests {
		if err := printImageStream(test.stream, buf, kctl.PrintOptions{}); err != test.expectedErr {
			t.Errorf("error mismatch: expected %v, got %v", test.expectedErr, err)
			continue
		}
		got := buf.String()
		buf.Reset()

		if !strings.Contains(got, test.expectedOut) {
			t.Errorf("unexpected output:\n%s\nexpected to contain: %s", got, test.expectedOut)
			continue
		}
	}

}

func mockStreams() []*imageapi.ImageStream {
	return []*imageapi.ImageStream{
		{
			ObjectMeta: kapi.ObjectMeta{Name: "less-than-three-tags"},
			Status: imageapi.ImageStreamStatus{
				Tags: map[string]imageapi.TagEventList{
					"other": {
						Items: []imageapi.TagEvent{
							{
								DockerImageReference: "other-ref",
								Created:              unversioned.Date(2015, 9, 4, 13, 52, 0, 0, time.UTC),
								Image:                "other-image",
							},
						},
					},
					"latest": {
						Items: []imageapi.TagEvent{
							{
								DockerImageReference: "latest-ref",
								Created:              unversioned.Date(2015, 9, 4, 13, 53, 0, 0, time.UTC),
								Image:                "latest-image",
							},
						},
					},
				},
			},
		},
		{
			ObjectMeta: kapi.ObjectMeta{Name: "three-tags"},
			Status: imageapi.ImageStreamStatus{
				Tags: map[string]imageapi.TagEventList{
					"other": {
						Items: []imageapi.TagEvent{
							{
								DockerImageReference: "other-ref",
								Created:              unversioned.Date(2015, 9, 4, 13, 52, 0, 0, time.UTC),
								Image:                "other-image",
							},
						},
					},
					"latest": {
						Items: []imageapi.TagEvent{
							{
								DockerImageReference: "latest-ref",
								Created:              unversioned.Date(2015, 9, 4, 13, 53, 0, 0, time.UTC),
								Image:                "latest-image",
							},
						},
					},
					"third": {
						Items: []imageapi.TagEvent{
							{
								DockerImageReference: "third-ref",
								Created:              unversioned.Date(2015, 9, 4, 13, 54, 0, 0, time.UTC),
								Image:                "third-image",
							},
						},
					},
				},
			},
		},
		{
			ObjectMeta: kapi.ObjectMeta{Name: "more-than-three-tags"},
			Status: imageapi.ImageStreamStatus{
				Tags: map[string]imageapi.TagEventList{
					"other": {
						Items: []imageapi.TagEvent{
							{
								DockerImageReference: "other-ref",
								Created:              unversioned.Date(2015, 9, 4, 13, 52, 0, 0, time.UTC),
								Image:                "other-image",
							},
						},
					},
					"latest": {
						Items: []imageapi.TagEvent{
							{
								DockerImageReference: "latest-ref",
								Created:              unversioned.Date(2015, 9, 4, 13, 53, 0, 0, time.UTC),
								Image:                "latest-image",
							},
						},
					},
					"third": {
						Items: []imageapi.TagEvent{
							{
								DockerImageReference: "third-ref",
								Created:              unversioned.Date(2015, 9, 4, 13, 54, 0, 0, time.UTC),
								Image:                "third-image",
							},
						},
					},
					"another": {
						Items: []imageapi.TagEvent{
							{
								DockerImageReference: "another-ref",
								Created:              unversioned.Date(2015, 9, 4, 13, 55, 0, 0, time.UTC),
								Image:                "another-image",
							},
						},
					},
				},
			},
		},
	}
}
