//go:build windows
// +build windows

/*
Copyright 2018 The Kubernetes 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 util

import (
	"fmt"
	"reflect"
	"runtime"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestGetAddressAndDialer(t *testing.T) {

	// Compare dialer function by pointer
	tcpDialPointer := reflect.ValueOf(tcpDial).Pointer()
	npipeDialPointer := reflect.ValueOf(npipeDial).Pointer()
	var nilDialPointer uintptr = 0x0

	tests := []struct {
		endpoint      string
		expectedAddr  string
		expectedDial  uintptr
		expectedError bool
	}{
		{
			endpoint:      "tcp://localhost:15880",
			expectedAddr:  "localhost:15880",
			expectedDial:  tcpDialPointer,
			expectedError: false,
		},
		{
			endpoint:      "npipe://./pipe/mypipe",
			expectedAddr:  "//./pipe/mypipe",
			expectedDial:  npipeDialPointer,
			expectedError: false,
		},
		{
			endpoint:      "npipe:\\\\.\\pipe\\mypipe",
			expectedAddr:  "//./pipe/mypipe",
			expectedDial:  npipeDialPointer,
			expectedError: false,
		},
		{
			endpoint:      "unix:///tmp/s1.sock",
			expectedAddr:  "",
			expectedDial:  nilDialPointer,
			expectedError: true,
		},
		{
			endpoint:      "tcp1://abc",
			expectedAddr:  "",
			expectedDial:  nilDialPointer,
			expectedError: true,
		},
		{
			endpoint:      "a b c",
			expectedAddr:  "",
			expectedDial:  nilDialPointer,
			expectedError: true,
		},
	}

	for _, test := range tests {
		expectedDialerName := runtime.FuncForPC(test.expectedDial).Name()
		if expectedDialerName == "" {
			expectedDialerName = "nilDial"
		}
		t.Run(fmt.Sprintf("Endpoint is %s, addr is %s and dialer is %s",
			test.endpoint, test.expectedAddr, expectedDialerName),
			func(t *testing.T) {
				address, dialer, err := GetAddressAndDialer(test.endpoint)

				dialerPointer := reflect.ValueOf(dialer).Pointer()
				actualDialerName := runtime.FuncForPC(dialerPointer).Name()
				if actualDialerName == "" {
					actualDialerName = "nilDial"
				}

				assert.Equalf(t, test.expectedDial, dialerPointer,
					"Expected dialer %s, but get %s", expectedDialerName, actualDialerName)

				assert.Equal(t, test.expectedAddr, address)

				if test.expectedError {
					assert.NotNil(t, err, "Expect error during parsing %q", test.endpoint)
				} else {
					assert.Nil(t, err, "Expect no error during parsing %q", test.endpoint)
				}
			})
	}
}

func TestParseEndpoint(t *testing.T) {
	tests := []struct {
		endpoint         string
		expectedError    bool
		expectedProtocol string
		expectedAddr     string
	}{
		{
			endpoint:         "unix:///tmp/s1.sock",
			expectedProtocol: "unix",
			expectedError:    true,
		},
		{
			endpoint:         "tcp://localhost:15880",
			expectedProtocol: "tcp",
			expectedAddr:     "localhost:15880",
		},
		{
			endpoint:         "npipe://./pipe/mypipe",
			expectedProtocol: "npipe",
			expectedAddr:     "//./pipe/mypipe",
		},
		{
			endpoint:         "npipe:////./pipe/mypipe2",
			expectedProtocol: "npipe",
			expectedAddr:     "//./pipe/mypipe2",
		},
		{
			endpoint:         "npipe:/pipe/mypipe3",
			expectedProtocol: "npipe",
			expectedAddr:     "//./pipe/mypipe3",
		},
		{
			endpoint:         "npipe:\\\\.\\pipe\\mypipe4",
			expectedProtocol: "npipe",
			expectedAddr:     "//./pipe/mypipe4",
		},
		{
			endpoint:         "npipe:\\pipe\\mypipe5",
			expectedProtocol: "npipe",
			expectedAddr:     "//./pipe/mypipe5",
		},
		{
			endpoint:         "tcp1://abc",
			expectedProtocol: "tcp1",
			expectedError:    true,
		},
		{
			endpoint:      "a b c",
			expectedError: true,
		},
	}

	for _, test := range tests {
		protocol, addr, err := parseEndpoint(test.endpoint)
		assert.Equal(t, test.expectedProtocol, protocol)
		if test.expectedError {
			assert.NotNil(t, err, "Expect error during parsing %q", test.endpoint)
			continue
		}
		require.Nil(t, err, "Expect no error during parsing %q", test.endpoint)
		assert.Equal(t, test.expectedAddr, addr)
	}

}

func TestNormalizePath(t *testing.T) {
	tests := []struct {
		originalpath   string
		normalizedPath string
	}{
		{
			originalpath:   "\\path\\to\\file",
			normalizedPath: "c:\\path\\to\\file",
		},
		{
			originalpath:   "/path/to/file",
			normalizedPath: "c:\\path\\to\\file",
		},
		{
			originalpath:   "/path/to/dir/",
			normalizedPath: "c:\\path\\to\\dir\\",
		},
		{
			originalpath:   "\\path\\to\\dir\\",
			normalizedPath: "c:\\path\\to\\dir\\",
		},
		{
			originalpath:   "/file",
			normalizedPath: "c:\\file",
		},
		{
			originalpath:   "\\file",
			normalizedPath: "c:\\file",
		},
		{
			originalpath:   "fileonly",
			normalizedPath: "fileonly",
		},
	}

	for _, test := range tests {
		assert.Equal(t, test.normalizedPath, NormalizePath(test.originalpath))
	}
}

func TestLocalEndpoint(t *testing.T) {
	tests := []struct {
		path             string
		file             string
		expectError      bool
		expectedFullPath string
	}{
		{
			path:             "/var/lib/kubelet/pod-resources",
			file:             "kube.sock", // this is not the default, but it's not relevant here
			expectError:      false,
			expectedFullPath: `npipe://\\.\pipe\kubelet-pod-resources`,
		},
	}
	for _, test := range tests {
		fullPath, err := LocalEndpoint(test.path, test.file)
		if test.expectError {
			assert.NotNil(t, err, "expected error")
			continue
		}
		assert.Nil(t, err, "expected no error")
		assert.Equal(t, test.expectedFullPath, fullPath)
	}
}

func TestLocalEndpointRoundTrip(t *testing.T) {
	npipeDialPointer := reflect.ValueOf(npipeDial).Pointer()
	expectedDialerName := runtime.FuncForPC(npipeDialPointer).Name()
	expectedAddress := "//./pipe/kubelet-pod-resources"

	fullPath, err := LocalEndpoint(`pod-resources`, "kubelet")
	require.NoErrorf(t, err, "Failed to create the local endpoint path")

	address, dialer, err := GetAddressAndDialer(fullPath)
	require.NoErrorf(t, err, "Failed to parse the endpoint path and get back address and dialer (path=%q)", fullPath)

	dialerPointer := reflect.ValueOf(dialer).Pointer()
	actualDialerName := runtime.FuncForPC(dialerPointer).Name()

	assert.Equalf(t, npipeDialPointer, dialerPointer,
		"Expected dialer %s, but get %s", expectedDialerName, actualDialerName)

	assert.Equal(t, expectedAddress, address)
}