/*
 *
 * Copyright 2020 The KubeSphere 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 resource

import (
	"github.com/google/go-cmp/cmp"
	fakesnapshot "github.com/kubernetes-csi/external-snapshotter/v2/pkg/client/clientset/versioned/fake"
	fakeapp "github.com/kubernetes-sigs/application/pkg/client/clientset/versioned/fake"
	fakeistio "istio.io/client-go/pkg/clientset/versioned/fake"
	appsv1 "k8s.io/api/apps/v1"
	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	fakek8s "k8s.io/client-go/kubernetes/fake"
	fakeks "kubesphere.io/kubesphere/pkg/client/clientset/versioned/fake"
	"kubesphere.io/kubesphere/pkg/informers"
	"kubesphere.io/kubesphere/pkg/models"
	"kubesphere.io/kubesphere/pkg/models/resources/v1alpha2"
	"kubesphere.io/kubesphere/pkg/server/params"
	"testing"
)

func TestConditions(t *testing.T) {
	factory, err := prepare()
	if err != nil {
		t.Fatal(err)
	}
	resource := NewResourceGetter(factory)

	tests := []struct {
		Name           string
		Namespace      string
		Resource       string
		Conditions     *params.Conditions
		OrderBy        string
		Reverse        bool
		Limit          int
		Offset         int
		ExpectResponse *models.PageableResponse
		ExpectError    error
	}{{
		Name:       "list namespace order by name asc",
		Namespace:  "",
		Resource:   "namespaces",
		Conditions: &params.Conditions{},
		OrderBy:    "name",
		Reverse:    false,
		Limit:      10,
		Offset:     0,
		ExpectResponse: &models.PageableResponse{
			Items:      []interface{}{defaultNamespace, kubesphereNamespace},
			TotalCount: 2,
		},
		ExpectError: nil,
	}, {
		Name:       "list namespace order by name desc",
		Namespace:  "",
		Resource:   "namespaces",
		Conditions: &params.Conditions{},
		OrderBy:    "name",
		Reverse:    true,
		Limit:      10,
		Offset:     0,
		ExpectResponse: &models.PageableResponse{
			Items:      []interface{}{kubesphereNamespace, defaultNamespace},
			TotalCount: 2,
		},
		ExpectError: nil,
	},
		{
			Name:       "list deployment",
			Namespace:  "default",
			Resource:   "deployments",
			Conditions: &params.Conditions{},
			OrderBy:    "name",
			Reverse:    false,
			Limit:      10,
			Offset:     0,
			ExpectResponse: &models.PageableResponse{
				Items:      []interface{}{nginxDeployment, redisDeployment},
				TotalCount: 2,
			},
			ExpectError: nil,
		},
		{
			Name:      "filter deployment by keyword",
			Namespace: "default",
			Resource:  "deployments",
			Conditions: &params.Conditions{
				Match: map[string]string{v1alpha2.Keyword: "ngin"},
				Fuzzy: nil,
			},
			OrderBy: "name",
			Reverse: true,
			Limit:   10,
			Offset:  0,
			ExpectResponse: &models.PageableResponse{
				Items:      []interface{}{nginxDeployment},
				TotalCount: 1,
			},
			ExpectError: nil,
		},
		{
			Name:      "filter deployment by label",
			Namespace: "default",
			Resource:  "deployments",
			Conditions: &params.Conditions{
				Match: map[string]string{"kubesphere.io/creator": "admin"},
				Fuzzy: nil,
			},
			OrderBy: "",
			Reverse: true,
			Limit:   10,
			Offset:  0,
			ExpectResponse: &models.PageableResponse{
				Items:      []interface{}{redisDeployment},
				TotalCount: 1,
			},
			ExpectError: nil,
		}, {
			Name:      "filter deployment by status",
			Namespace: "default",
			Resource:  "deployments",
			Conditions: &params.Conditions{
				Match: map[string]string{v1alpha2.Status: v1alpha2.StatusRunning},
				Fuzzy: nil,
			},
			OrderBy: "",
			Reverse: true,
			Limit:   10,
			Offset:  0,
			ExpectResponse: &models.PageableResponse{
				Items:      []interface{}{nginxDeployment},
				TotalCount: 1,
			},
			ExpectError: nil,
		},
	}

	for _, test := range tests {
		response, err := resource.ListResources(test.Namespace, test.Resource, test.Conditions, test.OrderBy, test.Reverse, test.Limit, test.Offset)
		if err != test.ExpectError {
			t.Fatalf("expected error: %s, got: %s", test.ExpectError, err)
		}
		if diff := cmp.Diff(test.ExpectResponse, response); diff != "" {
			t.Errorf(diff)
		}
	}

}

var (
	defaultNamespace = &corev1.Namespace{
		ObjectMeta: metav1.ObjectMeta{
			Name:   "default",
			Labels: map[string]string{"kubesphere.io/workspace": "system-workspace"},
		},
	}
	kubesphereNamespace = &corev1.Namespace{
		ObjectMeta: metav1.ObjectMeta{
			Name:   "kubesphere-system",
			Labels: map[string]string{"kubesphere.io/workspace": "system-workspace"},
		},
	}

	replicas = int32(1)

	nginxDeployment = &appsv1.Deployment{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "nginx",
			Namespace: "default",
		},
		Spec: appsv1.DeploymentSpec{
			Replicas: &replicas,
		},
		Status: appsv1.DeploymentStatus{
			ReadyReplicas: 1,
		},
	}
	redisDeployment = &appsv1.Deployment{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "redis",
			Namespace: "default",
			Labels:    map[string]string{"kubesphere.io/creator": "admin"},
		},
		Spec: appsv1.DeploymentSpec{
			Replicas: &replicas,
		},
		Status: appsv1.DeploymentStatus{
			ReadyReplicas: 0,
		},
	}
)

func prepare() (informers.InformerFactory, error) {

	namespaces := []interface{}{defaultNamespace, kubesphereNamespace}
	deployments := []interface{}{nginxDeployment, redisDeployment}

	ksClient := fakeks.NewSimpleClientset()
	k8sClient := fakek8s.NewSimpleClientset()
	istioClient := fakeistio.NewSimpleClientset()
	appClient := fakeapp.NewSimpleClientset()
	snapshotClient := fakesnapshot.NewSimpleClientset()
	fakeInformerFactory := informers.NewInformerFactories(k8sClient, ksClient, istioClient, appClient, snapshotClient, nil)

	k8sInformerFactory := fakeInformerFactory.KubernetesSharedInformerFactory()

	for _, namespace := range namespaces {
		err := k8sInformerFactory.Core().V1().Namespaces().Informer().GetIndexer().Add(namespace)
		if err != nil {
			return nil, err
		}
	}
	for _, deployment := range deployments {
		err := k8sInformerFactory.Apps().V1().Deployments().Informer().GetIndexer().Add(deployment)
		if err != nil {
			return nil, err
		}
	}

	return fakeInformerFactory, nil
}