/*
Copyright 2017 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 integration

import (
	"fmt"
	"testing"
	"time"

	"k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
	metav1beta1 "k8s.io/apimachinery/pkg/apis/meta/v1beta1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/runtime/schema"
	"k8s.io/apimachinery/pkg/runtime/serializer"
	"k8s.io/apimachinery/pkg/types"
	utilfeature "k8s.io/apiserver/pkg/util/feature"
	utilfeaturetesting "k8s.io/apiserver/pkg/util/feature/testing"
	"k8s.io/client-go/dynamic"
	"k8s.io/client-go/rest"

	apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
	apiextensionsfeatures "k8s.io/apiextensions-apiserver/pkg/features"
	"k8s.io/apiextensions-apiserver/test/integration/fixtures"
)

func newTableCRD() *apiextensionsv1beta1.CustomResourceDefinition {
	return &apiextensionsv1beta1.CustomResourceDefinition{
		ObjectMeta: metav1.ObjectMeta{Name: "tables.mygroup.example.com"},
		Spec: apiextensionsv1beta1.CustomResourceDefinitionSpec{
			Group:   "mygroup.example.com",
			Version: "v1beta1",
			Names: apiextensionsv1beta1.CustomResourceDefinitionNames{
				Plural:   "tables",
				Singular: "table",
				Kind:     "Table",
				ListKind: "TablemList",
			},
			Scope: apiextensionsv1beta1.ClusterScoped,
			Versions: []apiextensionsv1beta1.CustomResourceDefinitionVersion{
				{
					Name:    "v1beta1",
					Served:  true,
					Storage: false,
					AdditionalPrinterColumns: []apiextensionsv1beta1.CustomResourceColumnDefinition{
						{Name: "Age", Type: "date", JSONPath: ".metadata.creationTimestamp"},
						{Name: "Alpha", Type: "string", JSONPath: ".spec.alpha"},
						{Name: "Beta", Type: "integer", Description: "the beta field", Format: "int64", Priority: 42, JSONPath: ".spec.beta"},
						{Name: "Gamma", Type: "integer", Description: "a column with wrongly typed values", JSONPath: ".spec.gamma"},
						{Name: "Epsilon", Type: "string", Description: "an array of integers as string", JSONPath: ".spec.epsilon"},
					},
				},
				{
					Name:    "v1",
					Served:  true,
					Storage: true,
					AdditionalPrinterColumns: []apiextensionsv1beta1.CustomResourceColumnDefinition{
						{Name: "Age", Type: "date", JSONPath: ".metadata.creationTimestamp"},
						{Name: "Alpha", Type: "string", JSONPath: ".spec.alpha"},
						{Name: "Beta", Type: "integer", Description: "the beta field", Format: "int64", Priority: 42, JSONPath: ".spec.beta"},
						{Name: "Gamma", Type: "integer", Description: "a column with wrongly typed values", JSONPath: ".spec.gamma"},
						{Name: "Epsilon", Type: "string", Description: "an array of integers as string", JSONPath: ".spec.epsilon"},
						{Name: "Zeta", Type: "integer", Description: "the zeta field", Format: "int64", Priority: 42, JSONPath: ".spec.zeta"},
					},
				},
			},
		},
	}
}

func newTableInstance(name string) *unstructured.Unstructured {
	return &unstructured.Unstructured{
		Object: map[string]interface{}{
			"apiVersion": "mygroup.example.com/v1",
			"kind":       "Table",
			"metadata": map[string]interface{}{
				"name": name,
			},
			"spec": map[string]interface{}{
				"alpha":   "foo_123",
				"beta":    10,
				"gamma":   "bar",
				"delta":   "hello",
				"epsilon": []int64{1, 2, 3},
				"zeta":    5,
			},
		},
	}
}

func TestTableGet(t *testing.T) {
	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, apiextensionsfeatures.CustomResourceWebhookConversion, true)()
	tearDown, config, _, err := fixtures.StartDefaultServer(t)
	if err != nil {
		t.Fatal(err)
	}
	defer tearDown()

	apiExtensionClient, err := clientset.NewForConfig(config)
	if err != nil {
		t.Fatal(err)
	}

	dynamicClient, err := dynamic.NewForConfig(config)
	if err != nil {
		t.Fatal(err)
	}

	crd := newTableCRD()
	crd, err = fixtures.CreateNewCustomResourceDefinition(crd, apiExtensionClient, dynamicClient)
	if err != nil {
		t.Fatal(err)
	}

	crd, err = apiExtensionClient.ApiextensionsV1beta1().CustomResourceDefinitions().Get(crd.Name, metav1.GetOptions{})
	if err != nil {
		t.Fatal(err)
	}
	t.Logf("table crd created: %#v", crd)

	crClient := newNamespacedCustomResourceVersionedClient("", dynamicClient, crd, "v1")
	foo, err := crClient.Create(newTableInstance("foo"), metav1.CreateOptions{})
	if err != nil {
		t.Fatalf("unable to create noxu instance: %v", err)
	}
	t.Logf("foo created: %#v", foo.UnstructuredContent())

	for i, v := range crd.Spec.Versions {
		gv := schema.GroupVersion{Group: crd.Spec.Group, Version: v.Name}
		gvk := gv.WithKind(crd.Spec.Names.Kind)

		scheme := runtime.NewScheme()
		codecs := serializer.NewCodecFactory(scheme)
		parameterCodec := runtime.NewParameterCodec(scheme)
		metav1.AddToGroupVersion(scheme, gv)
		scheme.AddKnownTypes(gv, &metav1beta1.Table{}, &metav1beta1.TableOptions{})
		scheme.AddKnownTypes(metav1beta1.SchemeGroupVersion, &metav1beta1.Table{}, &metav1beta1.TableOptions{})

		crConfig := *config
		crConfig.GroupVersion = &gv
		crConfig.APIPath = "/apis"
		crConfig.NegotiatedSerializer = serializer.DirectCodecFactory{CodecFactory: codecs}
		crRestClient, err := rest.RESTClientFor(&crConfig)
		if err != nil {
			t.Fatal(err)
		}

		ret, err := crRestClient.Get().
			Resource(crd.Spec.Names.Plural).
			SetHeader("Accept", fmt.Sprintf("application/json;as=Table;v=%s;g=%s, application/json", metav1beta1.SchemeGroupVersion.Version, metav1beta1.GroupName)).
			VersionedParams(&metav1beta1.TableOptions{}, parameterCodec).
			Do().
			Get()
		if err != nil {
			t.Fatalf("failed to list %v resources: %v", gvk, err)
		}

		tbl, ok := ret.(*metav1beta1.Table)
		if !ok {
			t.Fatalf("expected metav1beta1.Table, got %T", ret)
		}
		t.Logf("%v table list: %#v", gvk, tbl)

		columns, err := getColumnsForVersion(crd, v.Name)
		if err != nil {
			t.Fatal(err)
		}
		expectColumnNum := len(columns) + 1
		if got, expected := len(tbl.ColumnDefinitions), expectColumnNum; got != expected {
			t.Errorf("expected %d headers, got %d", expected, got)
		} else {
			age := metav1beta1.TableColumnDefinition{Name: "Age", Type: "date", Format: "", Description: "Custom resource definition column (in JSONPath format): .metadata.creationTimestamp", Priority: 0}
			if got, expected := tbl.ColumnDefinitions[1], age; got != expected {
				t.Errorf("expected column definition %#v, got %#v", expected, got)
			}

			alpha := metav1beta1.TableColumnDefinition{Name: "Alpha", Type: "string", Format: "", Description: "Custom resource definition column (in JSONPath format): .spec.alpha", Priority: 0}
			if got, expected := tbl.ColumnDefinitions[2], alpha; got != expected {
				t.Errorf("expected column definition %#v, got %#v", expected, got)
			}

			beta := metav1beta1.TableColumnDefinition{Name: "Beta", Type: "integer", Format: "int64", Description: "the beta field", Priority: 42}
			if got, expected := tbl.ColumnDefinitions[3], beta; got != expected {
				t.Errorf("expected column definition %#v, got %#v", expected, got)
			}

			gamma := metav1beta1.TableColumnDefinition{Name: "Gamma", Type: "integer", Description: "a column with wrongly typed values"}
			if got, expected := tbl.ColumnDefinitions[4], gamma; got != expected {
				t.Errorf("expected column definition %#v, got %#v", expected, got)
			}

			epsilon := metav1beta1.TableColumnDefinition{Name: "Epsilon", Type: "string", Description: "an array of integers as string"}
			if got, expected := tbl.ColumnDefinitions[5], epsilon; got != expected {
				t.Errorf("expected column definition %#v, got %#v", expected, got)
			}

			// Validate extra column for v1
			if i == 1 {
				zeta := metav1beta1.TableColumnDefinition{Name: "Zeta", Type: "integer", Format: "int64", Description: "the zeta field", Priority: 42}
				if got, expected := tbl.ColumnDefinitions[6], zeta; got != expected {
					t.Errorf("expected column definition %#v, got %#v", expected, got)
				}
			}
		}
		if got, expected := len(tbl.Rows), 1; got != expected {
			t.Errorf("expected %d rows, got %d", expected, got)
		} else if got, expected := len(tbl.Rows[0].Cells), expectColumnNum; got != expected {
			t.Errorf("expected %d cells, got %d", expected, got)
		} else {
			if got, expected := tbl.Rows[0].Cells[0], "foo"; got != expected {
				t.Errorf("expected cell[0] to equal %q, got %q", expected, got)
			}
			if s, ok := tbl.Rows[0].Cells[1].(string); !ok {
				t.Errorf("expected cell[1] to be a string, got: %#v", tbl.Rows[0].Cells[1])
			} else {
				dur, err := time.ParseDuration(s)
				if err != nil {
					t.Errorf("expected cell[1] to be a duration: %v", err)
				} else if abs(dur.Seconds()) > 30.0 {
					t.Errorf("expected cell[1] to be a small age, but got: %v", dur)
				}
			}
			if got, expected := tbl.Rows[0].Cells[2], "foo_123"; got != expected {
				t.Errorf("expected cell[2] to equal %q, got %q", expected, got)
			}
			if got, expected := tbl.Rows[0].Cells[3], int64(10); got != expected {
				t.Errorf("expected cell[3] to equal %#v, got %#v", expected, got)
			}
			if got, expected := tbl.Rows[0].Cells[4], interface{}(nil); got != expected {
				t.Errorf("expected cell[4] to equal %#v although the type does not match the column, got %#v", expected, got)
			}
			if got, expected := tbl.Rows[0].Cells[5], "[1 2 3]"; got != expected {
				t.Errorf("expected cell[5] to equal %q, got %q", expected, got)
			}
			// Validate extra column for v1
			if i == 1 {
				if got, expected := tbl.Rows[0].Cells[6], int64(5); got != expected {
					t.Errorf("expected cell[6] to equal %q, got %q", expected, got)
				}
			}
		}
	}
}

// TestColumnsPatch tests the case that a CRD was created with no top-level or
// per-version columns. One should be able to PATCH the CRD setting per-version columns.
func TestColumnsPatch(t *testing.T) {
	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, apiextensionsfeatures.CustomResourceWebhookConversion, true)()
	tearDown, config, _, err := fixtures.StartDefaultServer(t)
	if err != nil {
		t.Fatal(err)
	}
	defer tearDown()

	apiExtensionClient, err := clientset.NewForConfig(config)
	if err != nil {
		t.Fatal(err)
	}

	dynamicClient, err := dynamic.NewForConfig(config)
	if err != nil {
		t.Fatal(err)
	}

	// CRD with no top-level and per-version columns should be created successfully
	crd := NewNoxuSubresourcesCRDs(apiextensionsv1beta1.NamespaceScoped)[0]
	crd, err = fixtures.CreateNewCustomResourceDefinition(crd, apiExtensionClient, dynamicClient)
	if err != nil {
		t.Fatal(err)
	}

	// One should be able to patch the CRD to use per-version columns. The top-level columns
	// should not be defaulted during creation, and apiserver should not return validation
	// error about top-level and per-version columns being mutual exclusive.
	patch := []byte(`{"spec":{"versions":[{"name":"v1beta1","served":true,"storage":true,"additionalPrinterColumns":[{"name":"Age","type":"date","JSONPath":".metadata.creationTimestamp"}]},{"name":"v1","served":true,"storage":false,"additionalPrinterColumns":[{"name":"Age2","type":"date","JSONPath":".metadata.creationTimestamp"}]}]}}`)

	_, err = apiExtensionClient.ApiextensionsV1beta1().CustomResourceDefinitions().Patch(crd.Name, types.MergePatchType, patch)
	if err != nil {
		t.Fatal(err)
	}

	crd, err = apiExtensionClient.ApiextensionsV1beta1().CustomResourceDefinitions().Get(crd.Name, metav1.GetOptions{})
	if err != nil {
		t.Fatal(err)
	}
	t.Logf("columns crd patched: %#v", crd)
}

// TestPatchCleanTopLevelColumns tests the case that a CRD was created with top-level columns.
// One should be able to PATCH the CRD cleaning the top-level columns and setting per-version
// columns.
func TestPatchCleanTopLevelColumns(t *testing.T) {
	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, apiextensionsfeatures.CustomResourceWebhookConversion, true)()
	tearDown, config, _, err := fixtures.StartDefaultServer(t)
	if err != nil {
		t.Fatal(err)
	}
	defer tearDown()

	apiExtensionClient, err := clientset.NewForConfig(config)
	if err != nil {
		t.Fatal(err)
	}

	dynamicClient, err := dynamic.NewForConfig(config)
	if err != nil {
		t.Fatal(err)
	}

	crd := NewNoxuSubresourcesCRDs(apiextensionsv1beta1.NamespaceScoped)[0]
	crd.Spec.AdditionalPrinterColumns = []apiextensionsv1beta1.CustomResourceColumnDefinition{
		{Name: "Age", Type: "date", Description: swaggerMetadataDescriptions["creationTimestamp"], JSONPath: ".metadata.creationTimestamp"},
	}
	crd, err = fixtures.CreateNewCustomResourceDefinition(crd, apiExtensionClient, dynamicClient)
	if err != nil {
		t.Fatal(err)
	}
	t.Logf("columns crd created: %#v", crd)

	// One should be able to patch the CRD to use per-version columns by cleaning
	// the top-level columns.
	patch := []byte(`{"spec":{"additionalPrinterColumns":null,"versions":[{"name":"v1beta1","served":true,"storage":true,"additionalPrinterColumns":[{"name":"Age","type":"date","JSONPath":".metadata.creationTimestamp"}]},{"name":"v1","served":true,"storage":false,"additionalPrinterColumns":[{"name":"Age2","type":"date","JSONPath":".metadata.creationTimestamp"}]}]}}`)

	_, err = apiExtensionClient.ApiextensionsV1beta1().CustomResourceDefinitions().Patch(crd.Name, types.MergePatchType, patch)
	if err != nil {
		t.Fatal(err)
	}

	crd, err = apiExtensionClient.ApiextensionsV1beta1().CustomResourceDefinitions().Get(crd.Name, metav1.GetOptions{})
	if err != nil {
		t.Fatal(err)
	}
	t.Logf("columns crd patched: %#v", crd)
}

func abs(x float64) float64 {
	if x < 0 {
		return -x
	}
	return x
}
