/*
Copyright 2016 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 localpath

import (
	"fmt"
	"os"
	"path/filepath"
	"runtime"
	"strings"
	"testing"

	"k8s.io/client-go/util/homedir"
)

func TestReplaceWinDriveLetterToVolumeName(t *testing.T) {
	path := t.TempDir()

	if runtime.GOOS != "windows" {
		// Replace to fake func.
		getWindowsVolumeName = func(d string) (string, error) {
			return `/`, nil
		}
		// Add dummy Windows drive letter.
		path = `C:` + path
	}

	if _, err := replaceWinDriveLetterToVolumeName(path); err != nil {
		t.Errorf("Error replace a Windows drive letter to a volume name: %v", err)
	}
}

func TestHasWindowsDriveLetter(t *testing.T) {
	cases := []struct {
		path string
		want bool
	}{
		{`C:\Users\Foo\.minikube`, true},
		{`D:\minikube\.minikube`, true},
		{`C\Foo\Bar\.minikube`, false},
		{`/home/foo/.minikube`, false},
	}

	for _, tc := range cases {
		if hasWindowsDriveLetter(tc.path) != tc.want {
			t.Errorf("%s have a Windows drive letter: %t", tc.path, tc.want)
		}
	}
}

func TestMiniPath(t *testing.T) {
	var testCases = []struct {
		env, basePath string
	}{
		{"/tmp/.minikube", "/tmp/"},
		{"/tmp/", "/tmp"},
		{"", homedir.HomeDir()},
	}
	originalEnv := os.Getenv(MinikubeHome)
	defer func() { // revert to pre-test env var
		err := os.Setenv(MinikubeHome, originalEnv)
		if err != nil {
			t.Fatalf("Error reverting env %s to its original value (%s) var after test ", MinikubeHome, originalEnv)
		}
	}()
	for _, tc := range testCases {
		t.Run(tc.env, func(t *testing.T) {
			expectedPath := filepath.Join(tc.basePath, ".minikube")
			os.Setenv(MinikubeHome, tc.env)
			path := MiniPath()
			if path != expectedPath {
				t.Errorf("MiniPath expected to return '%s', but got '%s'", expectedPath, path)
			}
		})
	}
}

func TestMachinePath(t *testing.T) {
	var testCases = []struct {
		miniHome []string
		contains string
	}{
		{[]string{"tmp", "foo", "bar", "baz"}, "tmp"},
		{[]string{"tmp"}, "tmp"},
		{[]string{}, MiniPath()},
	}
	for _, tc := range testCases {
		t.Run(fmt.Sprintf("%s", tc.miniHome), func(t *testing.T) {
			machinePath := MachinePath("foo", tc.miniHome...)
			if !strings.Contains(machinePath, tc.contains) {
				t.Errorf("Function MachinePath returned (%v) which doesn't contain expected (%v)", machinePath, tc.contains)
			}
		})
	}
}

type propertyFnWithArg func(string) string

func TestPropertyWithNameArg(t *testing.T) {
	var testCases = []struct {
		propertyFunc propertyFnWithArg
		name         string
	}{
		{Profile, "Profile"},
		{ClientCert, "ClientCert"},
		{ClientKey, "ClientKey"},
	}
	miniPath := MiniPath()
	mockedName := "foo"
	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			if !strings.Contains(tc.propertyFunc(mockedName), MiniPath()) {
				t.Errorf("Property %s(%v) doesn't contain miniPath %v", tc.name, tc.propertyFunc, miniPath)
			}
			if !strings.Contains(tc.propertyFunc(mockedName), mockedName) {
				t.Errorf("Property %s(%v) doesn't contain passed name %v", tc.name, tc.propertyFunc, mockedName)
			}
		})

	}
}

type propertyFnWithoutArg func() string

func TestPropertyWithoutNameArg(t *testing.T) {
	var testCases = []struct {
		propertyFunc propertyFnWithoutArg
		name         string
	}{
		{ConfigFile, "ConfigFile"},
		{CACert, "CACert"},
	}
	miniPath := MiniPath()
	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			if !strings.Contains(tc.propertyFunc(), MiniPath()) {
				t.Errorf("Property %s(%v) doesn't contain expected miniPath %v", tc.name, tc.propertyFunc, miniPath)
			}
		})
	}
}
