package v1alpha1

import (
	"bytes"
	"encoding/json"
	"fmt"
	"github.com/google/go-cmp/cmp"
	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/cli-runtime/pkg/printers"
	k8sfake "k8s.io/client-go/kubernetes/fake"
	"kubesphere.io/kubesphere/pkg/apis/cluster/v1alpha1"
	"kubesphere.io/kubesphere/pkg/client/clientset/versioned/fake"
	"kubesphere.io/kubesphere/pkg/informers"
	"kubesphere.io/kubesphere/pkg/version"
	"net/http"
	"net/http/httptest"
	"net/url"
	"sigs.k8s.io/controller-runtime/pkg/envtest"
	"sigs.k8s.io/testing_frameworks/integration"
	"testing"
)

const (
	proxyAddress = "http://139.198.121.121:8080"
	agentImage   = "kubesphere/tower:v1.0"
	proxyService = "tower.kubesphere-system.svc"
)

var cluster = &v1alpha1.Cluster{
	ObjectMeta: metav1.ObjectMeta{
		Name: "gondor",
	},
	Spec: v1alpha1.ClusterSpec{
		Connection: v1alpha1.Connection{
			Type:  v1alpha1.ConnectionTypeProxy,
			Token: "randomtoken",
		},
	},
}

var service = &corev1.Service{
	ObjectMeta: metav1.ObjectMeta{
		Name:      "tower",
		Namespace: "kubesphere-system",
	},
	Spec: corev1.ServiceSpec{
		Ports: []corev1.ServicePort{
			{
				Port:     8080,
				Protocol: corev1.ProtocolTCP,
			},
		},
	},
	Status: corev1.ServiceStatus{
		LoadBalancer: corev1.LoadBalancerStatus{
			Ingress: []corev1.LoadBalancerIngress{
				{
					IP:       "139.198.121.121",
					Hostname: "foo.bar",
				},
			},
		},
	},
}

var expected = `apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  name: cluster-agent
  namespace: kubesphere-system
spec:
  selector:
    matchLabels:
      app: agent
      app.kubernetes.io/part-of: tower
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: agent
        app.kubernetes.io/part-of: tower
    spec:
      containers:
      - command:
        - /agent
        - --name=gondor
        - --token=randomtoken
        - --proxy-server=http://139.198.121.121:8080
        - --keepalive=10s
        - --kubesphere-service=ks-apiserver.kubesphere-system.svc:80
        - --kubernetes-service=kubernetes.default.svc:443
        - --v=0
        image: kubesphere/tower:v1.0
        name: agent
        resources:
          limits:
            cpu: "1"
            memory: 200M
          requests:
            cpu: 100m
            memory: 100M
      serviceAccountName: kubesphere
status: {}
`

func TestGeranteAgentDeployment(t *testing.T) {
	k8sclient := k8sfake.NewSimpleClientset(service)
	ksclient := fake.NewSimpleClientset(cluster)

	informersFactory := informers.NewInformerFactories(k8sclient, ksclient, nil, nil, nil, nil)

	informersFactory.KubernetesSharedInformerFactory().Core().V1().Services().Informer().GetIndexer().Add(service)
	informersFactory.KubeSphereSharedInformerFactory().Cluster().V1alpha1().Clusters().Informer().GetIndexer().Add(cluster)

	directConnectionCluster := cluster.DeepCopy()
	directConnectionCluster.Spec.Connection.Type = v1alpha1.ConnectionTypeDirect

	var testCases = []struct {
		description    string
		expectingError bool
		expectedError  error
		cluster        *v1alpha1.Cluster
		expected       string
	}{
		{
			description:    "test normal case",
			expectingError: false,
			expected:       expected,
			cluster:        cluster,
		},
		{
			description:    "test direct connection cluster",
			expectingError: true,
			expectedError:  errClusterConnectionIsNotProxy,
			cluster:        directConnectionCluster,
		},
	}

	for _, testCase := range testCases {

		t.Run(testCase.description, func(t *testing.T) {
			h := newHandler(informersFactory.KubernetesSharedInformerFactory().Core().V1().Services().Lister(),
				informersFactory.KubeSphereSharedInformerFactory().Cluster().V1alpha1().Clusters().Lister(),
				proxyService,
				"",
				agentImage)

			var buf bytes.Buffer

			err := h.populateProxyAddress()
			if err != nil {
				t.Error(err)
			}

			err = h.generateDefaultDeployment(testCase.cluster, &buf)
			if testCase.expectingError {
				if err == nil {
					t.Fatalf("expecting error %v, got nil", testCase.expectedError)
				} else if err != testCase.expectedError {
					t.Fatalf("expecting error %v, got %v", testCase.expectedError, err)
				}
			}

			if diff := cmp.Diff(testCase.expected, buf.String()); len(diff) != 0 {
				t.Errorf("%T, got +, expected -, %s", testCase.expected, diff)
			}
		})
	}
}

func TestInnerGenerateAgentDeployment(t *testing.T) {
	h := &handler{
		proxyAddress: proxyAddress,
		agentImage:   agentImage,
		yamlPrinter:  &printers.YAMLPrinter{},
	}

	var buf bytes.Buffer

	err := h.generateDefaultDeployment(cluster, &buf)

	if err != nil {
		t.Error(err)
	}

	if diff := cmp.Diff(buf.String(), expected); len(diff) != 0 {
		t.Error(diff)
	}

}

var base64EncodedKubeConfig = `
apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: 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
    server: 127.0.0.1:6578
  name: kubernetes
contexts:
- context:
    cluster: kubernetes
    user: kubernetes-admin
  name: kubernetes-admin@kubernetes
current-context: kubernetes-admin@kubernetes
kind: Config
preferences: {}
users:
- name: kubernetes-admin
  user:
    client-certificate-data: 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
    client-key-data: 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
`

func TestValidateKubeConfig(t *testing.T) {
	k8sclient := k8sfake.NewSimpleClientset(service)
	ksclient := fake.NewSimpleClientset(cluster)

	informersFactory := informers.NewInformerFactories(k8sclient, ksclient, nil, nil, nil, nil)

	informersFactory.KubernetesSharedInformerFactory().Core().V1().Services().Informer().GetIndexer().Add(service)
	informersFactory.KubeSphereSharedInformerFactory().Cluster().V1alpha1().Clusters().Informer().GetIndexer().Add(cluster)

	h := newHandler(informersFactory.KubernetesSharedInformerFactory().Core().V1().Services().Lister(),
		informersFactory.KubeSphereSharedInformerFactory().Cluster().V1alpha1().Clusters().Lister(),
		proxyService,
		"",
		agentImage)

	config, err := loadKubeConfigFromBytes([]byte(base64EncodedKubeConfig))
	if err != nil {
		t.Fatal(err)
	}

	// config.Host is schemaless, we need to add schema manually
	u, err := url.Parse(fmt.Sprintf("http://%s", config.Host))
	if err != nil {
		t.Fatal(err)
	}

	// we need to specify apiserver port to match above kubeconfig
	env := &envtest.Environment{
		Config: config,
		ControlPlane: integration.ControlPlane{
			APIServer: &integration.APIServer{
				Args: envtest.DefaultKubeAPIServerFlags,
				URL:  u,
			},
		},
	}

	cfg, err := env.Start()
	if err != nil {
		t.Log(cfg)
		t.Fatal(err)
	}

	defer func() {
		_ = env.Stop()
	}()

	err = h.validateKubeConfig([]byte(base64EncodedKubeConfig))
	if err != nil {
		t.Fatal(err)
	}
}

var ver = version.Get()

func endpoint(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	_ = json.NewEncoder(w).Encode(ver)
}

func TestValidateKubeSphereEndpoint(t *testing.T) {
	svr := httptest.NewServer(http.HandlerFunc(endpoint))
	defer svr.Close()

	got, err := validateKubeSphereAPIServer(svr.URL, nil)
	if err != nil {
		t.Fatal(err)
	}

	if diff := cmp.Diff(&ver, got); len(diff) != 0 {
		t.Errorf("%T +got, -expected %v", ver, diff)
	}

}