/*
Copyright (c) Edgeless Systems GmbH

SPDX-License-Identifier: AGPL-3.0-only
*/

package cmd

import (
	"bytes"
	"context"
	"encoding/hex"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"net"
	"strconv"
	"strings"
	"testing"
	"time"

	"github.com/edgelesssys/constellation/v2/bootstrapper/initproto"
	"github.com/edgelesssys/constellation/v2/cli/internal/cmd/pathprefix"
	"github.com/edgelesssys/constellation/v2/cli/internal/helm"
	"github.com/edgelesssys/constellation/v2/cli/internal/state"
	"github.com/edgelesssys/constellation/v2/internal/atls"
	"github.com/edgelesssys/constellation/v2/internal/attestation/measurements"
	"github.com/edgelesssys/constellation/v2/internal/attestation/variant"
	"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
	"github.com/edgelesssys/constellation/v2/internal/cloud/gcpshared"
	"github.com/edgelesssys/constellation/v2/internal/config"
	"github.com/edgelesssys/constellation/v2/internal/constants"
	"github.com/edgelesssys/constellation/v2/internal/file"
	"github.com/edgelesssys/constellation/v2/internal/grpc/atlscredentials"
	"github.com/edgelesssys/constellation/v2/internal/grpc/dialer"
	"github.com/edgelesssys/constellation/v2/internal/grpc/testdialer"
	"github.com/edgelesssys/constellation/v2/internal/kms/uri"
	"github.com/edgelesssys/constellation/v2/internal/license"
	"github.com/edgelesssys/constellation/v2/internal/logger"
	"github.com/edgelesssys/constellation/v2/internal/semver"
	"github.com/edgelesssys/constellation/v2/internal/versions"
	"github.com/spf13/afero"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"google.golang.org/grpc"
	k8serrors "k8s.io/apimachinery/pkg/api/errors"
	"k8s.io/apimachinery/pkg/runtime/schema"
	"k8s.io/client-go/tools/clientcmd"
	k8sclientapi "k8s.io/client-go/tools/clientcmd/api"
)

func TestInitArgumentValidation(t *testing.T) {
	assert := assert.New(t)

	cmd := NewInitCmd()
	assert.NoError(cmd.ValidateArgs(nil))
	assert.Error(cmd.ValidateArgs([]string{"something"}))
	assert.Error(cmd.ValidateArgs([]string{"sth", "sth"}))
}

func TestInitialize(t *testing.T) {
	respKubeconfig := k8sclientapi.Config{
		Clusters: map[string]*k8sclientapi.Cluster{
			"cluster": {
				Server: "https://192.0.2.1:6443",
			},
		},
	}
	respKubeconfigBytes, err := clientcmd.Write(respKubeconfig)
	require.NoError(t, err)

	gcpServiceAccKey := &gcpshared.ServiceAccountKey{
		Type:                    "service_account",
		ProjectID:               "project_id",
		PrivateKeyID:            "key_id",
		PrivateKey:              "key",
		ClientEmail:             "client_email",
		ClientID:                "client_id",
		AuthURI:                 "auth_uri",
		TokenURI:                "token_uri",
		AuthProviderX509CertURL: "cert",
		ClientX509CertURL:       "client_cert",
	}
	testInitResp := &initproto.InitSuccessResponse{
		Kubeconfig: respKubeconfigBytes,
		OwnerId:    []byte("ownerID"),
		ClusterId:  []byte("clusterID"),
	}
	serviceAccPath := "/test/service-account.json"

	testCases := map[string]struct {
		provider                cloudprovider.Provider
		stateFile               *state.State
		configMutator           func(*config.Config)
		serviceAccKey           *gcpshared.ServiceAccountKey
		initServerAPI           *stubInitServer
		retriable               bool
		masterSecretShouldExist bool
		wantErr                 bool
	}{
		"initialize some gcp instances": {
			provider:      cloudprovider.GCP,
			stateFile:     &state.State{Version: state.Version1, Infrastructure: state.Infrastructure{ClusterEndpoint: "192.0.2.1"}},
			configMutator: func(c *config.Config) { c.Provider.GCP.ServiceAccountKeyPath = serviceAccPath },
			serviceAccKey: gcpServiceAccKey,
			initServerAPI: &stubInitServer{res: []*initproto.InitResponse{{Kind: &initproto.InitResponse_InitSuccess{InitSuccess: testInitResp}}}},
		},
		"initialize some azure instances": {
			provider:      cloudprovider.Azure,
			stateFile:     &state.State{Version: state.Version1, Infrastructure: state.Infrastructure{ClusterEndpoint: "192.0.2.1"}},
			initServerAPI: &stubInitServer{res: []*initproto.InitResponse{{Kind: &initproto.InitResponse_InitSuccess{InitSuccess: testInitResp}}}},
		},
		"initialize some qemu instances": {
			provider:      cloudprovider.QEMU,
			stateFile:     &state.State{Version: state.Version1, Infrastructure: state.Infrastructure{ClusterEndpoint: "192.0.2.1"}},
			initServerAPI: &stubInitServer{res: []*initproto.InitResponse{{Kind: &initproto.InitResponse_InitSuccess{InitSuccess: testInitResp}}}},
		},
		"non retriable error": {
			provider:                cloudprovider.QEMU,
			stateFile:               &state.State{Version: state.Version1, Infrastructure: state.Infrastructure{ClusterEndpoint: "192.0.2.1"}},
			initServerAPI:           &stubInitServer{initErr: &nonRetriableError{err: assert.AnError}},
			retriable:               false,
			masterSecretShouldExist: true,
			wantErr:                 true,
		},
		"non retriable error with failed log collection": {
			provider:  cloudprovider.QEMU,
			stateFile: &state.State{Version: state.Version1, Infrastructure: state.Infrastructure{ClusterEndpoint: "192.0.2.1"}},
			initServerAPI: &stubInitServer{
				res: []*initproto.InitResponse{
					{
						Kind: &initproto.InitResponse_InitFailure{
							InitFailure: &initproto.InitFailureResponse{
								Error: "error",
							},
						},
					},
					{
						Kind: &initproto.InitResponse_InitFailure{
							InitFailure: &initproto.InitFailureResponse{
								Error: "error",
							},
						},
					},
				},
			},
			retriable:               false,
			masterSecretShouldExist: true,
			wantErr:                 true,
		},
		/*
			Tests currently disabled since we don't actually have validation for the state file yet
			These tests cases only passed in the past because of unrelated errors in the test setup
			TODO(AB#3492): Re-enable tests once state file validation is implemented

			"state file with only version": {
				provider:      cloudprovider.GCP,
				stateFile:     &state.State{Version: state.Version1},
				configMutator: func(c *config.Config) { c.Provider.GCP.ServiceAccountKeyPath = serviceAccPath },
				serviceAccKey: gcpServiceAccKey,
				initServerAPI: &stubInitServer{},
				retriable:     true,
				wantErr:       true,
			},

			"empty state file": {
				provider:      cloudprovider.GCP,
				stateFile:     &state.State{},
				configMutator: func(c *config.Config) { c.Provider.GCP.ServiceAccountKeyPath = serviceAccPath },
				serviceAccKey: gcpServiceAccKey,
				initServerAPI: &stubInitServer{},
				retriable:     true,
				wantErr:       true,
			},
		*/
		"no state file": {
			provider:      cloudprovider.GCP,
			configMutator: func(c *config.Config) { c.Provider.GCP.ServiceAccountKeyPath = serviceAccPath },
			serviceAccKey: gcpServiceAccKey,
			retriable:     true,
			wantErr:       true,
		},
		"init call fails": {
			provider:                cloudprovider.GCP,
			configMutator:           func(c *config.Config) { c.Provider.GCP.ServiceAccountKeyPath = serviceAccPath },
			stateFile:               &state.State{Version: state.Version1, Infrastructure: state.Infrastructure{ClusterEndpoint: "192.0.2.1"}},
			serviceAccKey:           gcpServiceAccKey,
			initServerAPI:           &stubInitServer{initErr: assert.AnError},
			retriable:               false,
			masterSecretShouldExist: true,
			wantErr:                 true,
		},
		"k8s version without v works": {
			provider:      cloudprovider.Azure,
			stateFile:     &state.State{Version: state.Version1, Infrastructure: state.Infrastructure{ClusterEndpoint: "192.0.2.1"}},
			initServerAPI: &stubInitServer{res: []*initproto.InitResponse{{Kind: &initproto.InitResponse_InitSuccess{InitSuccess: testInitResp}}}},
			configMutator: func(c *config.Config) {
				res, err := versions.NewValidK8sVersion(strings.TrimPrefix(string(versions.Default), "v"), true)
				require.NoError(t, err)
				c.KubernetesVersion = res
			},
		},
		"outdated k8s patch version doesn't work": {
			provider:      cloudprovider.Azure,
			stateFile:     &state.State{Version: state.Version1, Infrastructure: state.Infrastructure{ClusterEndpoint: "192.0.2.1"}},
			initServerAPI: &stubInitServer{res: []*initproto.InitResponse{{Kind: &initproto.InitResponse_InitSuccess{InitSuccess: testInitResp}}}},
			configMutator: func(c *config.Config) {
				v, err := semver.New(versions.SupportedK8sVersions()[0])
				require.NoError(t, err)
				outdatedPatchVer := semver.NewFromInt(v.Major(), v.Minor(), v.Patch()-1, "").String()
				c.KubernetesVersion = versions.ValidK8sVersion(outdatedPatchVer)
			},
			wantErr:   true,
			retriable: true, // doesn't need to show retriable error message
		},
	}

	for name, tc := range testCases {
		t.Run(name, func(t *testing.T) {
			assert := assert.New(t)
			require := require.New(t)
			// Networking
			netDialer := testdialer.NewBufconnDialer()
			newDialer := func(atls.Validator) *dialer.Dialer {
				return dialer.New(nil, nil, netDialer)
			}
			serverCreds := atlscredentials.New(nil, nil)
			initServer := grpc.NewServer(grpc.Creds(serverCreds))
			initproto.RegisterAPIServer(initServer, tc.initServerAPI)
			port := strconv.Itoa(constants.BootstrapperPort)
			listener := netDialer.GetListener(net.JoinHostPort("192.0.2.1", port))
			go initServer.Serve(listener)
			defer initServer.GracefulStop()

			// Command
			cmd := NewInitCmd()
			var out bytes.Buffer
			cmd.SetOut(&out)
			var errOut bytes.Buffer
			cmd.SetErr(&errOut)

			// File system preparation
			fs := afero.NewMemMapFs()
			fileHandler := file.NewHandler(fs)
			config := defaultConfigWithExpectedMeasurements(t, config.Default(), tc.provider)
			if tc.configMutator != nil {
				tc.configMutator(config)
			}
			require.NoError(fileHandler.WriteYAML(constants.ConfigFilename, config, file.OptNone))
			if tc.stateFile != nil {
				require.NoError(tc.stateFile.WriteToFile(fileHandler, constants.StateFilename))
			}
			if tc.serviceAccKey != nil {
				require.NoError(fileHandler.WriteJSON(serviceAccPath, tc.serviceAccKey, file.OptNone))
			}

			ctx := context.Background()
			ctx, cancel := context.WithTimeout(ctx, 4*time.Second)
			defer cancel()
			cmd.SetContext(ctx)

			i := &applyCmd{
				fileHandler:  fileHandler,
				flags:        applyFlags{rootFlags: rootFlags{force: true}},
				log:          logger.NewTest(t),
				spinner:      &nopSpinner{},
				merger:       &stubMerger{},
				quotaChecker: &stubLicenseClient{},
				newHelmClient: func(string, debugLog) (helmApplier, error) {
					return &stubApplier{}, nil
				},
				newDialer: newDialer,
				newKubeUpgrader: func(io.Writer, string, debugLog) (kubernetesUpgrader, error) {
					return &stubKubernetesUpgrader{
						// On init, no attestation config exists yet
						getClusterAttestationConfigErr: k8serrors.NewNotFound(schema.GroupResource{}, ""),
					}, nil
				},
				clusterUpgrader: stubTerraformUpgrader{},
			}

			err := i.apply(cmd, stubAttestationFetcher{}, "test")

			if tc.wantErr {
				assert.Error(err)
				if !tc.retriable {
					assert.Contains(errOut.String(), "This error is not recoverable")
				} else {
					assert.Empty(errOut.String())
				}
				if !tc.masterSecretShouldExist {
					_, err = fileHandler.Stat(constants.MasterSecretFilename)
					assert.Error(err)
				}
				return
			}
			require.NoError(err)
			// assert.Contains(out.String(), base64.StdEncoding.EncodeToString([]byte("ownerID")))
			assert.Contains(out.String(), hex.EncodeToString([]byte("clusterID")))
			var secret uri.MasterSecret
			assert.NoError(fileHandler.ReadJSON(constants.MasterSecretFilename, &secret))
			assert.NotEmpty(secret.Key)
			assert.NotEmpty(secret.Salt)
		})
	}
}

type stubApplier struct {
	err error
}

func (s stubApplier) PrepareApply(_ *config.Config, _ *state.State, _ helm.Options, _ string, _ uri.MasterSecret) (helm.Applier, bool, error) {
	return stubRunner{}, false, s.err
}

type stubRunner struct {
	applyErr      error
	saveChartsErr error
}

func (s stubRunner) Apply(_ context.Context) error {
	return s.applyErr
}

func (s stubRunner) SaveCharts(_ string, _ file.Handler) error {
	return s.saveChartsErr
}

func TestGetLogs(t *testing.T) {
	someErr := errors.New("failed")

	testCases := map[string]struct {
		resp         initproto.API_InitClient
		fh           file.Handler
		wantedOutput []byte
		wantErr      bool
	}{
		"success": {
			resp:         stubInitClient{res: bytes.NewReader([]byte("asdf"))},
			fh:           file.NewHandler(afero.NewMemMapFs()),
			wantedOutput: []byte("asdf"),
		},
		"receive error": {
			resp:    stubInitClient{err: someErr},
			fh:      file.NewHandler(afero.NewMemMapFs()),
			wantErr: true,
		},
		"nil log": {
			resp:    stubInitClient{res: bytes.NewReader([]byte{1}), setResNil: true},
			fh:      file.NewHandler(afero.NewMemMapFs()),
			wantErr: true,
		},
		"failed write": {
			resp:    stubInitClient{res: bytes.NewReader([]byte("asdf"))},
			fh:      file.NewHandler(afero.NewReadOnlyFs(afero.NewMemMapFs())),
			wantErr: true,
		},
	}

	for name, tc := range testCases {
		t.Run(name, func(t *testing.T) {
			assert := assert.New(t)

			doer := initDoer{
				fh:  tc.fh,
				log: logger.NewTest(t),
			}

			err := doer.getLogs(tc.resp)

			if tc.wantErr {
				assert.Error(err)
			}

			text, err := tc.fh.Read(constants.ErrorLog)

			if tc.wantedOutput == nil {
				assert.Error(err)
			}

			assert.Equal(tc.wantedOutput, text)
		})
	}
}

func TestWriteOutput(t *testing.T) {
	assert := assert.New(t)
	require := require.New(t)

	clusterEndpoint := "cluster-endpoint"

	expectedKubeconfig := k8sclientapi.Config{
		Clusters: map[string]*k8sclientapi.Cluster{
			"cluster": {
				Server: fmt.Sprintf("https://%s:6443", clusterEndpoint),
			},
		},
	}
	expectedKubeconfigBytes, err := clientcmd.Write(expectedKubeconfig)
	require.NoError(err)

	respKubeconfig := k8sclientapi.Config{
		Clusters: map[string]*k8sclientapi.Cluster{
			"cluster": {
				Server: "https://192.0.2.1:6443",
			},
		},
	}
	respKubeconfigBytes, err := clientcmd.Write(respKubeconfig)
	require.NoError(err)

	resp := &initproto.InitResponse{
		Kind: &initproto.InitResponse_InitSuccess{
			InitSuccess: &initproto.InitSuccessResponse{
				OwnerId:    []byte("ownerID"),
				ClusterId:  []byte("clusterID"),
				Kubeconfig: respKubeconfigBytes,
			},
		},
	}

	ownerID := hex.EncodeToString(resp.GetInitSuccess().GetOwnerId())
	clusterID := hex.EncodeToString(resp.GetInitSuccess().GetClusterId())
	measurementSalt := []byte{0x41}

	expectedStateFile := &state.State{
		Version: state.Version1,
		ClusterValues: state.ClusterValues{
			ClusterID:       clusterID,
			OwnerID:         ownerID,
			MeasurementSalt: []byte{0x41},
		},
		Infrastructure: state.Infrastructure{
			APIServerCertSANs: []string{},
			InitSecret:        []byte{},
			ClusterEndpoint:   clusterEndpoint,
		},
	}

	var out bytes.Buffer
	testFs := afero.NewMemMapFs()
	fileHandler := file.NewHandler(testFs)

	stateFile := state.New().SetInfrastructure(state.Infrastructure{
		ClusterEndpoint: clusterEndpoint,
	})

	i := &applyCmd{
		fileHandler: fileHandler,
		spinner:     &nopSpinner{},
		merger:      &stubMerger{},
		log:         logger.NewTest(t),
	}
	err = i.writeInitOutput(stateFile, resp.GetInitSuccess(), false, &out, measurementSalt)
	require.NoError(err)
	assert.Contains(out.String(), clusterID)
	assert.Contains(out.String(), constants.AdminConfFilename)

	afs := afero.Afero{Fs: testFs}
	adminConf, err := afs.ReadFile(constants.AdminConfFilename)
	assert.NoError(err)
	assert.Contains(string(adminConf), clusterEndpoint)
	assert.Equal(string(expectedKubeconfigBytes), string(adminConf))

	fh := file.NewHandler(afs)
	readStateFile, err := state.ReadFromFile(fh, constants.StateFilename)
	assert.NoError(err)
	assert.Equal(expectedStateFile, readStateFile)
	out.Reset()
	require.NoError(afs.Remove(constants.AdminConfFilename))

	// test custom workspace
	i.flags.pathPrefixer = pathprefix.New("/some/path")
	err = i.writeInitOutput(stateFile, resp.GetInitSuccess(), true, &out, measurementSalt)
	require.NoError(err)
	assert.Contains(out.String(), clusterID)
	assert.Contains(out.String(), i.flags.pathPrefixer.PrefixPrintablePath(constants.AdminConfFilename))
	out.Reset()
	// File is written to current working dir, we simply pass the workspace for generating readable user output
	require.NoError(afs.Remove(constants.AdminConfFilename))
	i.flags.pathPrefixer = pathprefix.PathPrefixer{}

	// test config merging
	err = i.writeInitOutput(stateFile, resp.GetInitSuccess(), true, &out, measurementSalt)
	require.NoError(err)
	assert.Contains(out.String(), clusterID)
	assert.Contains(out.String(), constants.AdminConfFilename)
	assert.Contains(out.String(), "Constellation kubeconfig merged with default config")
	assert.Contains(out.String(), "You can now connect to your cluster")
	out.Reset()
	require.NoError(afs.Remove(constants.AdminConfFilename))

	// test config merging with env vars set
	i.merger = &stubMerger{envVar: "/some/path/to/kubeconfig"}
	err = i.writeInitOutput(stateFile, resp.GetInitSuccess(), true, &out, measurementSalt)
	require.NoError(err)
	assert.Contains(out.String(), clusterID)
	assert.Contains(out.String(), constants.AdminConfFilename)
	assert.Contains(out.String(), "Constellation kubeconfig merged with default config")
	assert.Contains(out.String(), "Warning: KUBECONFIG environment variable is set")
}

func TestGenerateMasterSecret(t *testing.T) {
	testCases := map[string]struct {
		createFileFunc func(handler file.Handler) error
		fs             func() afero.Fs
		wantErr        bool
	}{
		"file already exists": {
			fs: afero.NewMemMapFs,
			createFileFunc: func(handler file.Handler) error {
				return handler.WriteJSON(
					constants.MasterSecretFilename,
					uri.MasterSecret{Key: []byte("constellation-master-secret"), Salt: []byte("constellation-32Byte-length-salt")},
					file.OptNone,
				)
			},
			wantErr: true,
		},
		"file does not exist": {
			createFileFunc: func(handler file.Handler) error { return nil },
			fs:             afero.NewMemMapFs,
			wantErr:        false,
		},
		"file not writeable": {
			createFileFunc: func(handler file.Handler) error { return nil },
			fs:             func() afero.Fs { return afero.NewReadOnlyFs(afero.NewMemMapFs()) },
			wantErr:        true,
		},
	}

	for name, tc := range testCases {
		t.Run(name, func(t *testing.T) {
			assert := assert.New(t)
			require := require.New(t)

			fileHandler := file.NewHandler(tc.fs())
			require.NoError(tc.createFileFunc(fileHandler))

			var out bytes.Buffer
			i := &applyCmd{
				fileHandler: fileHandler,
				log:         logger.NewTest(t),
			}
			secret, err := i.generateAndPersistMasterSecret(&out)

			if tc.wantErr {
				assert.Error(err)
			} else {
				assert.NoError(err)

				require.Contains(out.String(), constants.MasterSecretFilename)

				var masterSecret uri.MasterSecret
				require.NoError(fileHandler.ReadJSON(constants.MasterSecretFilename, &masterSecret))
				assert.Equal(masterSecret.Key, secret.Key)
				assert.Equal(masterSecret.Salt, secret.Salt)
			}
		})
	}
}

func TestAttestation(t *testing.T) {
	assert := assert.New(t)
	require := require.New(t)

	initServerAPI := &stubInitServer{res: []*initproto.InitResponse{
		{
			Kind: &initproto.InitResponse_InitSuccess{
				InitSuccess: &initproto.InitSuccessResponse{
					Kubeconfig: []byte("kubeconfig"),
					OwnerId:    []byte("ownerID"),
					ClusterId:  []byte("clusterID"),
				},
			},
		},
	}}

	existingStateFile := &state.State{Version: state.Version1, Infrastructure: state.Infrastructure{ClusterEndpoint: "192.0.2.4"}}

	netDialer := testdialer.NewBufconnDialer()

	issuer := &testIssuer{
		Getter: variant.QEMUVTPM{},
		pcrs: map[uint32][]byte{
			0: bytes.Repeat([]byte{0xFF}, 32),
			1: bytes.Repeat([]byte{0xFF}, 32),
			2: bytes.Repeat([]byte{0xFF}, 32),
			3: bytes.Repeat([]byte{0xFF}, 32),
		},
	}
	serverCreds := atlscredentials.New(issuer, nil)
	initServer := grpc.NewServer(grpc.Creds(serverCreds))
	initproto.RegisterAPIServer(initServer, initServerAPI)
	port := strconv.Itoa(constants.BootstrapperPort)
	listener := netDialer.GetListener(net.JoinHostPort("192.0.2.4", port))
	go initServer.Serve(listener)
	defer initServer.GracefulStop()

	cmd := NewInitCmd()
	cmd.Flags().String("workspace", "", "") // register persistent flag manually
	cmd.Flags().Bool("force", true, "")     // register persistent flag manually
	var out bytes.Buffer
	cmd.SetOut(&out)
	var errOut bytes.Buffer
	cmd.SetErr(&errOut)

	fs := afero.NewMemMapFs()
	fileHandler := file.NewHandler(fs)
	require.NoError(existingStateFile.WriteToFile(fileHandler, constants.StateFilename))

	cfg := config.Default()
	cfg.Image = constants.BinaryVersion().String()
	cfg.RemoveProviderAndAttestationExcept(cloudprovider.QEMU)
	cfg.Attestation.QEMUVTPM.Measurements[0] = measurements.WithAllBytes(0x00, measurements.Enforce, measurements.PCRMeasurementLength)
	cfg.Attestation.QEMUVTPM.Measurements[1] = measurements.WithAllBytes(0x11, measurements.Enforce, measurements.PCRMeasurementLength)
	cfg.Attestation.QEMUVTPM.Measurements[2] = measurements.WithAllBytes(0x22, measurements.Enforce, measurements.PCRMeasurementLength)
	cfg.Attestation.QEMUVTPM.Measurements[3] = measurements.WithAllBytes(0x33, measurements.Enforce, measurements.PCRMeasurementLength)
	cfg.Attestation.QEMUVTPM.Measurements[4] = measurements.WithAllBytes(0x44, measurements.Enforce, measurements.PCRMeasurementLength)
	cfg.Attestation.QEMUVTPM.Measurements[9] = measurements.WithAllBytes(0x99, measurements.Enforce, measurements.PCRMeasurementLength)
	cfg.Attestation.QEMUVTPM.Measurements[12] = measurements.WithAllBytes(0xcc, measurements.Enforce, measurements.PCRMeasurementLength)
	require.NoError(fileHandler.WriteYAML(constants.ConfigFilename, cfg, file.OptNone))

	newDialer := func(v atls.Validator) *dialer.Dialer {
		validator := &testValidator{
			Getter: variant.QEMUVTPM{},
			pcrs:   cfg.GetAttestationConfig().GetMeasurements(),
		}
		return dialer.New(nil, validator, netDialer)
	}

	ctx := context.Background()
	ctx, cancel := context.WithTimeout(ctx, 4*time.Second)
	defer cancel()
	cmd.SetContext(ctx)

	i := &applyCmd{
		fileHandler: fileHandler,
		spinner:     &nopSpinner{},
		merger:      &stubMerger{},
		log:         logger.NewTest(t),
		newKubeUpgrader: func(io.Writer, string, debugLog) (kubernetesUpgrader, error) {
			return &stubKubernetesUpgrader{}, nil
		},
		newDialer: newDialer,
	}
	_, err := i.runInit(cmd, cfg, existingStateFile)
	assert.Error(err)
	// make sure the error is actually a TLS handshake error
	assert.Contains(err.Error(), "transport: authentication handshake failed")
	if validationErr, ok := err.(*config.ValidationError); ok {
		t.Log(validationErr.LongMessage())
	}
}

type testValidator struct {
	variant.Getter
	pcrs measurements.M
}

func (v *testValidator) Validate(_ context.Context, attDoc []byte, _ []byte) ([]byte, error) {
	var attestation struct {
		UserData []byte
		PCRs     map[uint32][]byte
	}
	if err := json.Unmarshal(attDoc, &attestation); err != nil {
		return nil, err
	}

	for k, pcr := range v.pcrs {
		if !bytes.Equal(attestation.PCRs[k], pcr.Expected[:]) {
			return nil, errors.New("invalid PCR value")
		}
	}
	return attestation.UserData, nil
}

type testIssuer struct {
	variant.Getter
	pcrs map[uint32][]byte
}

func (i *testIssuer) Issue(_ context.Context, userData []byte, _ []byte) ([]byte, error) {
	return json.Marshal(
		struct {
			UserData []byte
			PCRs     map[uint32][]byte
		}{
			UserData: userData,
			PCRs:     i.pcrs,
		},
	)
}

type stubInitServer struct {
	res     []*initproto.InitResponse
	initErr error

	initproto.UnimplementedAPIServer
}

func (s *stubInitServer) Init(_ *initproto.InitRequest, stream initproto.API_InitServer) error {
	for _, r := range s.res {
		_ = stream.Send(r)
	}
	return s.initErr
}

type stubMerger struct {
	envVar   string
	mergeErr error
}

func (m *stubMerger) mergeConfigs(string, file.Handler) error {
	return m.mergeErr
}

func (m *stubMerger) kubeconfigEnvVar() string {
	return m.envVar
}

func defaultConfigWithExpectedMeasurements(t *testing.T, conf *config.Config, csp cloudprovider.Provider) *config.Config {
	t.Helper()

	conf.RemoveProviderAndAttestationExcept(csp)

	conf.Image = constants.BinaryVersion().String()
	conf.Name = "kubernetes"

	var zone, instanceType, diskType string
	switch csp {
	case cloudprovider.Azure:
		conf.Provider.Azure.SubscriptionID = "01234567-0123-0123-0123-0123456789ab"
		conf.Provider.Azure.TenantID = "01234567-0123-0123-0123-0123456789ab"
		conf.Provider.Azure.Location = "test-location"
		conf.Provider.Azure.UserAssignedIdentity = "test-identity"
		conf.Provider.Azure.ResourceGroup = "test-resource-group"
		conf.Attestation.AzureSEVSNP.Measurements[4] = measurements.WithAllBytes(0x44, measurements.Enforce, measurements.PCRMeasurementLength)
		conf.Attestation.AzureSEVSNP.Measurements[9] = measurements.WithAllBytes(0x11, measurements.Enforce, measurements.PCRMeasurementLength)
		conf.Attestation.AzureSEVSNP.Measurements[12] = measurements.WithAllBytes(0xcc, measurements.Enforce, measurements.PCRMeasurementLength)
		instanceType = "Standard_DC4as_v5"
		diskType = "StandardSSD_LRS"
	case cloudprovider.GCP:
		conf.Provider.GCP.Region = "test-region"
		conf.Provider.GCP.Project = "test-project"
		conf.Provider.GCP.Zone = "test-zone"
		conf.Provider.GCP.ServiceAccountKeyPath = "test-key-path"
		conf.Attestation.GCPSEVES.Measurements[4] = measurements.WithAllBytes(0x44, measurements.Enforce, measurements.PCRMeasurementLength)
		conf.Attestation.GCPSEVES.Measurements[9] = measurements.WithAllBytes(0x11, measurements.Enforce, measurements.PCRMeasurementLength)
		conf.Attestation.GCPSEVES.Measurements[12] = measurements.WithAllBytes(0xcc, measurements.Enforce, measurements.PCRMeasurementLength)
		zone = "europe-west3-b"
		instanceType = "n2d-standard-4"
		diskType = "pd-ssd"
	case cloudprovider.QEMU:
		conf.Attestation.QEMUVTPM.Measurements[4] = measurements.WithAllBytes(0x44, measurements.Enforce, measurements.PCRMeasurementLength)
		conf.Attestation.QEMUVTPM.Measurements[9] = measurements.WithAllBytes(0x11, measurements.Enforce, measurements.PCRMeasurementLength)
		conf.Attestation.QEMUVTPM.Measurements[12] = measurements.WithAllBytes(0xcc, measurements.Enforce, measurements.PCRMeasurementLength)
	}

	for groupName, group := range conf.NodeGroups {
		group.Zone = zone
		group.InstanceType = instanceType
		group.StateDiskType = diskType
		conf.NodeGroups[groupName] = group
	}

	return conf
}

type stubLicenseClient struct{}

func (c *stubLicenseClient) QuotaCheck(_ context.Context, _ license.QuotaCheckRequest) (license.QuotaCheckResponse, error) {
	return license.QuotaCheckResponse{
		Quota: 25,
	}, nil
}

type stubInitClient struct {
	res       io.Reader
	err       error
	setResNil bool
	grpc.ClientStream
}

func (c stubInitClient) Recv() (*initproto.InitResponse, error) {
	if c.err != nil {
		return &initproto.InitResponse{}, c.err
	}

	text := make([]byte, 1024)
	n, err := c.res.Read(text)
	text = text[:n]

	res := &initproto.InitResponse{
		Kind: &initproto.InitResponse_Log{
			Log: &initproto.LogResponseType{
				Log: text,
			},
		},
	}
	if c.setResNil {
		res = &initproto.InitResponse{
			Kind: &initproto.InitResponse_Log{
				Log: &initproto.LogResponseType{
					Log: nil,
				},
			},
		}
	}

	return res, err
}