/*
Copyright 2014 The Kubernetes Authors All rights reserved.

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 clientcmd

import (
	"reflect"
	"testing"

	"k8s.io/kubernetes/pkg/api/testapi"
	client "k8s.io/kubernetes/pkg/client/unversioned"
	clientcmdapi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
)

func createValidTestConfig() *clientcmdapi.Config {
	const (
		server = "https://anything.com:8080"
		token  = "the-token"
	)

	config := clientcmdapi.NewConfig()
	config.Clusters["clean"] = &clientcmdapi.Cluster{
		Server:     server,
		APIVersion: testapi.Default.GroupVersion().String(),
	}
	config.AuthInfos["clean"] = &clientcmdapi.AuthInfo{
		Token: token,
	}
	config.Contexts["clean"] = &clientcmdapi.Context{
		Cluster:  "clean",
		AuthInfo: "clean",
	}
	config.CurrentContext = "clean"

	return config
}

func TestMergeContext(t *testing.T) {
	const namespace = "overriden-namespace"

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

	_, overridden, err := clientBuilder.Namespace()
	if err != nil {
		t.Errorf("Unexpected error: %v", err)
	}

	if overridden {
		t.Error("Expected namespace to not be overridden")
	}

	clientBuilder = NewNonInteractiveClientConfig(*config, "clean", &ConfigOverrides{
		Context: clientcmdapi.Context{
			Namespace: namespace,
		},
	})

	actual, overridden, err := clientBuilder.Namespace()
	if err != nil {
		t.Errorf("Unexpected error: %v", err)
	}

	if !overridden {
		t.Error("Expected namespace to be overridden")
	}

	matchStringArg(namespace, actual, 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:               testapi.Default.GroupVersion().String(),
		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: testapi.Default.GroupVersion().String(),
	}
	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 TestCreateClean(t *testing.T) {
	config := createValidTestConfig()
	clientBuilder := NewNonInteractiveClientConfig(*config, "clean", &ConfigOverrides{})

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

	matchStringArg(config.Clusters["clean"].Server, clientConfig.Host, t)
	matchStringArg("", clientConfig.APIPath, t)
	matchStringArg(config.Clusters["clean"].APIVersion, clientConfig.GroupVersion.String(), t)
	matchBoolArg(config.Clusters["clean"].InsecureSkipTLSVerify, clientConfig.Insecure, t)
	matchStringArg(config.AuthInfos["clean"].Token, clientConfig.BearerToken, t)
}

func TestCreateCleanWithPrefix(t *testing.T) {
	tt := []struct {
		server string
		host   string
	}{
		{"https://anything.com:8080/foo/bar", "https://anything.com:8080/foo/bar"},
		{"http://anything.com:8080/foo/bar", "http://anything.com:8080/foo/bar"},
		{"http://anything.com:8080/foo/bar/", "http://anything.com:8080/foo/bar/"},
		{"http://anything.com:8080/", "http://anything.com:8080/"},
		{"http://anything.com:8080//", "http://anything.com:8080//"},
		{"anything.com:8080/foo/bar", "anything.com:8080/foo/bar"},
		{"anything.com:8080", "anything.com:8080"},
		{"anything.com", "anything.com"},
		{"anything", "anything"},
	}

	// WARNING: EnvVarCluster.Server is set during package loading time and can not be overriden by os.Setenv inside this test
	EnvVarCluster.Server = ""
	tt = append(tt, struct{ server, host string }{"", "http://localhost:8080"})

	for _, tc := range tt {
		config := createValidTestConfig()

		cleanConfig := config.Clusters["clean"]
		cleanConfig.Server = tc.server
		config.Clusters["clean"] = cleanConfig

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

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

		matchStringArg(tc.host, clientConfig.Host, t)
	}
}

func TestCreateCleanDefault(t *testing.T) {
	config := createValidTestConfig()
	clientBuilder := NewDefaultClientConfig(*config, &ConfigOverrides{})

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

	matchStringArg(config.Clusters["clean"].Server, clientConfig.Host, t)
	matchStringArg(config.Clusters["clean"].APIVersion, clientConfig.GroupVersion.String(), t)
	matchBoolArg(config.Clusters["clean"].InsecureSkipTLSVerify, clientConfig.Insecure, t)
	matchStringArg(config.AuthInfos["clean"].Token, clientConfig.BearerToken, t)
}

func TestCreateMissingContext(t *testing.T) {
	const expectedErrorContains = "Context was not found for specified context"
	config := createValidTestConfig()
	clientBuilder := NewNonInteractiveClientConfig(*config, "not-present", &ConfigOverrides{})

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

	expectedConfig := &client.Config{Host: clientConfig.Host}

	if !reflect.DeepEqual(expectedConfig, clientConfig) {
		t.Errorf("Expected %#v, got %#v", expectedConfig, clientConfig)
	}

}

func matchBoolArg(expected, got bool, t *testing.T) {
	if expected != got {
		t.Errorf("Expected %v, got %v", expected, got)
	}
}

func matchStringArg(expected, got string, t *testing.T) {
	if expected != got {
		t.Errorf("Expected %q, got %q", expected, got)
	}
}

func matchByteArg(expected, got []byte, t *testing.T) {
	if !reflect.DeepEqual(expected, got) {
		t.Errorf("Expected %v, got %v", expected, got)
	}
}
