func TestNewEmptyAuth(t *testing.T) {
	expectedConfig := *clientcmdapi.NewConfig()
	expectedConfig.AuthInfos["the-user-name"] = *clientcmdapi.NewAuthInfo()
	test := configCommandTest{
		args:           []string{"set-credentials", "the-user-name"},
		startingConfig: *clientcmdapi.NewConfig(),
		expectedConfig: expectedConfig,
	}

	test.run(t)
}

func TestNewEmptyCluster(t *testing.T) {
	expectedConfig := *clientcmdapi.NewConfig()
	expectedConfig.Clusters["new-cluster"] = *clientcmdapi.NewCluster()
	test := configCommandTest{
		args:           []string{"set-cluster", "new-cluster"},
		startingConfig: *clientcmdapi.NewConfig(),
		expectedConfig: expectedConfig,
	}

	test.run(t)
}

func TestNewEmptyContext(t *testing.T) {
	expectedConfig := *clientcmdapi.NewConfig()
	expectedConfig.Contexts["new-context"] = *clientcmdapi.NewContext()
	test := configCommandTest{
		args:           []string{"set-context", "new-context"},
		startingConfig: *clientcmdapi.NewConfig(),
		expectedConfig: expectedConfig,
	}

	test.run(t)
}

// Load starts by running the MigrationRules and then
// takes the loading rules and returns a Config object based on following rules.
//   if the ExplicitPath, return the unmerged explicit file
//   Otherwise, return a merged config based on the Precedence slice
// A missing ExplicitPath file produces an error. Empty filenames or other missing files are ignored.
// Read errors or files with non-deserializable content produce errors.
// The first file to set a particular map key wins and map key's value is never changed.
// BUT, if you set a struct value that is NOT contained inside of map, the value WILL be changed.
// This results in some odd looking logic to merge in one direction, merge in the other, and then merge the two.
// It also means that if two files specify a "red-user", only values from the first file's red-user are used.  Even
// non-conflicting entries from the second file's "red-user" are discarded.
// Relative paths inside of the .kubeconfig files are resolved against the .kubeconfig file's parent folder
// and only absolute file paths are returned.
func (rules *ClientConfigLoadingRules) Load() (*clientcmdapi.Config, error) {
	if err := rules.Migrate(); err != nil {
		return nil, err
	}

	errlist := []error{}

	kubeConfigFiles := []string{}

	// Make sure a file we were explicitly told to use exists
	if len(rules.ExplicitPath) > 0 {
		if _, err := os.Stat(rules.ExplicitPath); os.IsNotExist(err) {
			return nil, err
		}
		kubeConfigFiles = append(kubeConfigFiles, rules.ExplicitPath)

	} else {
		kubeConfigFiles = append(kubeConfigFiles, rules.Precedence...)

	}

	// first merge all of our maps
	mapConfig := clientcmdapi.NewConfig()
	for _, file := range kubeConfigFiles {
		if err := mergeConfigWithFile(mapConfig, file); err != nil {
			errlist = append(errlist, err)
		}
		if rules.ResolvePaths() {
			if err := ResolveLocalPaths(file, mapConfig); err != nil {
				errlist = append(errlist, err)
			}
		}
	}

	// merge all of the struct values in the reverse order so that priority is given correctly
	// errors are not added to the list the second time
	nonMapConfig := clientcmdapi.NewConfig()
	for i := len(kubeConfigFiles) - 1; i >= 0; i-- {
		file := kubeConfigFiles[i]
		mergeConfigWithFile(nonMapConfig, file)
		if rules.ResolvePaths() {
			ResolveLocalPaths(file, nonMapConfig)
		}
	}

	// since values are overwritten, but maps values are not, we can merge the non-map config on top of the map config and
	// get the values we expect.
	config := clientcmdapi.NewConfig()
	mergo.Merge(config, mapConfig)
	mergo.Merge(config, nonMapConfig)

	return config, errors.NewAggregate(errlist)
}

func TestSetIntoNewConfig(t *testing.T) {
	expectedConfig := *clientcmdapi.NewConfig()
	context := clientcmdapi.NewContext()
	context.AuthInfo = "fake-user"
	expectedConfig.Contexts["new-context"] = *context
	test := configCommandTest{
		args:           []string{"set", "contexts.new-context.user", "fake-user"},
		startingConfig: *clientcmdapi.NewConfig(),
		expectedConfig: expectedConfig,
	}

	test.run(t)
}

func TestCertificateData(t *testing.T) {
	caData := []byte("ca-data")
	certData := []byte("cert-data")
	keyData := []byte("key-data")

	config := clientcmdapi.NewConfig()
	config.Clusters["clean"] = clientcmdapi.Cluster{
		Server:                   "https://localhost:8443",
		APIVersion:               latest.Version,
		CertificateAuthorityData: caData,
	}
	config.AuthInfos["clean"] = clientcmdapi.AuthInfo{
		ClientCertificateData: certData,
		ClientKeyData:         keyData,
	}
	config.Contexts["clean"] = clientcmdapi.Context{
		Cluster:  "clean",
		AuthInfo: "clean",
	}
	config.CurrentContext = "clean"

	clientBuilder := NewNonInteractiveClientConfig(*config, "clean", &ConfigOverrides{})

	clientConfig, err := clientBuilder.ClientConfig()
	if err != nil {
		t.Fatalf("Unexpected error: %v", err)
	}

	// Make sure cert data gets into config (will override file paths)
	matchByteArg(caData, clientConfig.TLSClientConfig.CAData, t)
	matchByteArg(certData, clientConfig.TLSClientConfig.CertData, t)
	matchByteArg(keyData, clientConfig.TLSClientConfig.KeyData, t)
}

func TestBasicAuthData(t *testing.T) {
	username := "myuser"
	password := "mypass"

	config := clientcmdapi.NewConfig()
	config.Clusters["clean"] = clientcmdapi.Cluster{
		Server:     "https://localhost:8443",
		APIVersion: latest.Version,
	}
	config.AuthInfos["clean"] = clientcmdapi.AuthInfo{
		Username: username,
		Password: password,
	}
	config.Contexts["clean"] = clientcmdapi.Context{
		Cluster:  "clean",
		AuthInfo: "clean",
	}
	config.CurrentContext = "clean"

	clientBuilder := NewNonInteractiveClientConfig(*config, "clean", &ConfigOverrides{})

	clientConfig, err := clientBuilder.ClientConfig()
	if err != nil {
		t.Fatalf("Unexpected error: %v", err)
	}

	// Make sure basic auth data gets into config
	matchStringArg(username, clientConfig.Username, t)
	matchStringArg(password, clientConfig.Password, t)
}

func TestValidateEmptyConfig(t *testing.T) {
	config := clientcmdapi.NewConfig()
	test := configValidationTest{
		config: config,
	}

	test.testConfig(t)
}

func TestNewFactoryNoFlagBindings(t *testing.T) {
	clientConfig := clientcmd.NewDefaultClientConfig(*clientcmdapi.NewConfig(), &clientcmd.ConfigOverrides{})
	factory := NewFactory(clientConfig)

	if factory.flags.HasFlags() {
		t.Errorf("Expected zero flags, but got %v", factory.flags)
	}
}

func (o *LoginOptions) Complete(f *osclientcmd.Factory, cmd *cobra.Command, args []string) error {
	kubeconfig, err := f.OpenShiftClientConfig.RawConfig()
	o.StartingKubeConfig = &kubeconfig
	if err != nil {
		if !os.IsNotExist(err) {
			return err
		}
		// build a valid object to use if we failed on a non-existent file
		o.StartingKubeConfig = kclientcmdapi.NewConfig()
	}

	addr := flagtypes.Addr{Value: "localhost:8443", DefaultScheme: "https", DefaultPort: 8443, AllowPrefix: true}.Default()

	if serverFlag := kcmdutil.GetFlagString(cmd, "server"); len(serverFlag) > 0 {
		if err := addr.Set(serverFlag); err != nil {
			return err
		}
		o.Server = addr.String()

	} else if len(args) == 1 {
		if err := addr.Set(args[0]); err != nil {
			return err
		}
		o.Server = addr.String()

	} else if len(o.Server) == 0 {
		if defaultContext, defaultContextExists := o.StartingKubeConfig.Contexts[o.StartingKubeConfig.CurrentContext]; defaultContextExists {
			if cluster, exists := o.StartingKubeConfig.Clusters[defaultContext.Cluster]; exists {
				o.Server = cluster.Server
			}
		}
	}

	o.CertFile = kcmdutil.GetFlagString(cmd, "client-certificate")
	o.KeyFile = kcmdutil.GetFlagString(cmd, "client-key")
	o.APIVersion = kcmdutil.GetFlagString(cmd, "api-version")

	// if the API version isn't explicitly passed, use the API version from the default context (same rules as the server above)
	if len(o.APIVersion) == 0 {
		if defaultContext, defaultContextExists := o.StartingKubeConfig.Contexts[o.StartingKubeConfig.CurrentContext]; defaultContextExists {
			if cluster, exists := o.StartingKubeConfig.Clusters[defaultContext.Cluster]; exists {
				o.APIVersion = cluster.APIVersion
			}
		}

	}

	o.CAFile = kcmdutil.GetFlagString(cmd, "certificate-authority")
	o.InsecureTLS = kcmdutil.GetFlagBool(cmd, "insecure-skip-tls-verify")
	o.Token = kcmdutil.GetFlagString(cmd, "token")

	o.DefaultNamespace, _ = f.OpenShiftClientConfig.Namespace()

	o.PathOptions = config.NewPathOptions(cmd)

	return nil
}

func TestConfirmUsableMissingConfig(t *testing.T) {
	config := clientcmdapi.NewConfig()
	test := configValidationTest{
		config:                 config,
		expectedErrorSubstring: []string{"context was not found for"},
	}

	test.testConfirmUsable("not-here", t)
}

func TestConfirmUsableEmptyConfig(t *testing.T) {
	config := clientcmdapi.NewConfig()
	test := configValidationTest{
		config:                 config,
		expectedErrorSubstring: []string{"no context chosen"},
	}

	test.testConfirmUsable("", t)
}

func TestIsContextNotFound(t *testing.T) {
	config := clientcmdapi.NewConfig()
	config.CurrentContext = "anything"

	err := Validate(*config)
	if !IsContextNotFound(err) {
		t.Errorf("Expected context not found, but got %v", err)
	}
}

func TestValidateEmptyAuthInfo(t *testing.T) {
	config := clientcmdapi.NewConfig()
	config.AuthInfos["error"] = clientcmdapi.AuthInfo{}
	test := configValidationTest{
		config: config,
	}

	test.testAuthInfo("error", t)
	test.testConfig(t)
}

func TestValidateMissingCurrentContextConfig(t *testing.T) {
	config := clientcmdapi.NewConfig()
	config.CurrentContext = "anything"
	test := configValidationTest{
		config:                 config,
		expectedErrorSubstring: []string{"context was not found for specified "},
	}

	test.testConfig(t)
}

func TestValidateEmptyClusterInfo(t *testing.T) {
	config := clientcmdapi.NewConfig()
	config.Clusters["empty"] = clientcmdapi.Cluster{}
	test := configValidationTest{
		config:                 config,
		expectedErrorSubstring: []string{"no server found for"},
	}

	test.testCluster("empty", t)
	test.testConfig(t)
}

func (o *pathOptions) getStartingConfig() (*clientcmdapi.Config, string, error) {
	filename := ""
	config := clientcmdapi.NewConfig()

	if len(o.specifiedFile) > 0 {
		filename = o.specifiedFile
		config = getConfigFromFileOrDie(filename)
	}

	if o.global {
		if len(filename) > 0 {
			return nil, "", fmt.Errorf("already loading from %v, cannot specify global as well", filename)
		}

		filename = os.Getenv("HOME") + "/.kube/.kubeconfig"
		config = getConfigFromFileOrDie(filename)
	}

	if o.envvar {
		if len(filename) > 0 {
			return nil, "", fmt.Errorf("already loading from %v, cannot specify global as well", filename)
		}

		filename = os.Getenv(clientcmd.RecommendedConfigPathEnvVar)
		if len(filename) == 0 {
			return nil, "", fmt.Errorf("environment variable %v does not have a value", clientcmd.RecommendedConfigPathEnvVar)
		}

		config = getConfigFromFileOrDie(filename)
	}

	if o.local {
		if len(filename) > 0 {
			return nil, "", fmt.Errorf("already loading from %v, cannot specify global as well", filename)
		}

		filename = ".kubeconfig"
		config = getConfigFromFileOrDie(filename)

	}

	// no specific flag was set, first attempt to use the envvar, then use local
	if len(filename) == 0 {
		if len(os.Getenv(clientcmd.RecommendedConfigPathEnvVar)) > 0 {
			filename = os.Getenv(clientcmd.RecommendedConfigPathEnvVar)
			config = getConfigFromFileOrDie(filename)
		} else {
			filename = ".kubeconfig"
			config = getConfigFromFileOrDie(filename)
		}
	}

	return config, filename, nil
}

// Load takes the loading rules and merges together a Config object based on following order.
//   1.  CommandLinePath
//   2.  EnvVarPath
//   3.  CurrentDirectoryPath
//   4.  HomeDirectoryPath
// A missing CommandLinePath file produces an error. Empty filenames or other missing files are ignored.
// Read errors or files with non-deserializable content produce errors.
// The first file to set a particular map key wins and map key's value is never changed.
// BUT, if you set a struct value that is NOT contained inside of map, the value WILL be changed.
// This results in some odd looking logic to merge in one direction, merge in the other, and then merge the two.
// It also means that if two files specify a "red-user", only values from the first file's red-user are used.  Even
// non-conflicting entries from the second file's "red-user" are discarded.
// Relative paths inside of the .kubeconfig files are resolved against the .kubeconfig file's parent folder
// and only absolute file paths are returned.
func (rules *ClientConfigLoadingRules) Load() (*clientcmdapi.Config, error) {

	errlist := []error{}

	// Make sure a file we were explicitly told to use exists
	if len(rules.CommandLinePath) > 0 {
		if _, err := os.Stat(rules.CommandLinePath); os.IsNotExist(err) {
			errlist = append(errlist, fmt.Errorf("The config file %v does not exist", rules.CommandLinePath))
		}
	}

	kubeConfigFiles := []string{rules.CommandLinePath, rules.EnvVarPath, rules.CurrentDirectoryPath, rules.HomeDirectoryPath}

	// first merge all of our maps
	mapConfig := clientcmdapi.NewConfig()
	for _, file := range kubeConfigFiles {
		if err := mergeConfigWithFile(mapConfig, file); err != nil {
			errlist = append(errlist, err)
		}
		if err := resolveLocalPaths(file, mapConfig); err != nil {
			errlist = append(errlist, err)
		}
	}

	// merge all of the struct values in the reverse order so that priority is given correctly
	// errors are not added to the list the second time
	nonMapConfig := clientcmdapi.NewConfig()
	for i := len(kubeConfigFiles) - 1; i >= 0; i-- {
		file := kubeConfigFiles[i]
		mergeConfigWithFile(nonMapConfig, file)
		resolveLocalPaths(file, nonMapConfig)
	}

	// since values are overwritten, but maps values are not, we can merge the non-map config on top of the map config and
	// get the values we expect.
	config := clientcmdapi.NewConfig()
	mergo.Merge(config, mapConfig)
	mergo.Merge(config, nonMapConfig)

	return config, errors.NewAggregate(errlist)
}

func TestValidateMissingReferencesConfig(t *testing.T) {
	config := clientcmdapi.NewConfig()
	config.CurrentContext = "anything"
	config.Contexts["anything"] = clientcmdapi.Context{Cluster: "missing", AuthInfo: "missing"}
	test := configValidationTest{
		config:                 config,
		expectedErrorSubstring: []string{"user \"missing\" was not found for context \"anything\"", "cluster \"missing\" was not found for context \"anything\""},
	}

	test.testContext("anything", t)
	test.testConfig(t)
}

// getConfigFromFileOrDie tries to read a kubeconfig file and if it can't, it calls exit.  One exception, missing files result in empty configs, not an exit
func getConfigFromFileOrDie(filename string) *clientcmdapi.Config {
	config, err := clientcmd.LoadFromFile(filename)
	if err != nil && !os.IsNotExist(err) {
		glog.FatalDepth(1, err)
	}

	if config == nil {
		return clientcmdapi.NewConfig()
	}

	return config
}