package cobra

import (
	"bytes"
	"fmt"
	"os"
	"reflect"
	"runtime"
	"strings"
	"testing"
	"text/template"

	"github.com/spf13/pflag"
)

var tp, te, tt, tr []string
var rootPersPre, echoPre, echoPersPre, timesPersPre []string
var flagb1, flagb2, flagb3, flagbr, flagbp bool
var flags1, flags2a, flags2b, flags3, outs string
var flagi1, flagi2, flagi3, flagi4, flagir int
var rootcalled bool
var versionUsed int

const strtwoParentHelp = "help message for parent flag strtwo"
const strtwoChildHelp = "help message for child flag strtwo"

var cmdHidden = &Command{
	Use:   "hide [secret string to print]",
	Short: "Print anything to screen (if command is known)",
	Long:  `an absolutely utterly useless command for testing.`,
	Run: func(cmd *Command, args []string) {
		outs = "hidden"
	},
	Hidden: true,
}

var cmdPrint = &Command{
	Use:   "print [string to print]",
	Args:  MinimumNArgs(1),
	Short: "Print anything to the screen",
	Long:  `an absolutely utterly useless command for testing.`,
	Run: func(cmd *Command, args []string) {
		tp = args
	},
}

var cmdEcho = &Command{
	Use:     "echo [string to echo]",
	Aliases: []string{"say"},
	Short:   "Echo anything to the screen",
	Long:    `an utterly useless command for testing.`,
	Example: "Just run cobra-test echo",
	PersistentPreRun: func(cmd *Command, args []string) {
		echoPersPre = args
	},
	PreRun: func(cmd *Command, args []string) {
		echoPre = args
	},
	Run: func(cmd *Command, args []string) {
		te = args
	},
}

var cmdEchoSub = &Command{
	Use:   "echosub [string to print]",
	Short: "second sub command for echo",
	Long:  `an absolutely utterly useless command for testing gendocs!.`,
	Run: func(cmd *Command, args []string) {
	},
}

var cmdDeprecated = &Command{
	Use:        "deprecated [can't do anything here]",
	Short:      "A command which is deprecated",
	Long:       `an absolutely utterly useless command for testing deprecation!.`,
	Deprecated: "Please use echo instead",
	Run: func(cmd *Command, args []string) {
	},
	Args: NoArgs,
}

var cmdTimes = &Command{
	Use:        "times [# times] [string to echo]",
	SuggestFor: []string{"counts"},
	Short:      "Echo anything to the screen more times",
	Long:       `a slightly useless command for testing.`,
	PersistentPreRun: func(cmd *Command, args []string) {
		timesPersPre = args
	},
	Run: func(cmd *Command, args []string) {
		tt = args
	},
	Args:      OnlyValidArgs,
	ValidArgs: []string{"one", "two", "three", "four"},
}

var cmdRootNoRun = &Command{
	Use:   "cobra-test",
	Short: "The root can run its own function",
	Long:  "The root description for help",
	PersistentPreRun: func(cmd *Command, args []string) {
		rootPersPre = args
	},
}

var cmdRootSameName = &Command{
	Use:   "print",
	Short: "Root with the same name as a subcommand",
	Long:  "The root description for help",
}

var cmdRootTakesArgs = &Command{
	Use:   "root-with-args [random args]",
	Short: "The root can run it's own function and takes args!",
	Long:  "The root description for help, and some args",
	Run: func(cmd *Command, args []string) {
		tr = args
	},
	Args: ArbitraryArgs,
}

var cmdRootWithRun = &Command{
	Use:   "cobra-test",
	Short: "The root can run its own function",
	Long:  "The root description for help",
	Run: func(cmd *Command, args []string) {
		tr = args
		rootcalled = true
	},
}

var cmdSubNoRun = &Command{
	Use:   "subnorun",
	Short: "A subcommand without a Run function",
	Long:  "A long output about a subcommand without a Run function",
}

var cmdCustomFlags = &Command{
	Use:   "customflags [flags] -- REMOTE_COMMAND",
	Short: "A command that expects flags in a custom location",
	Long:  "A long output about a command that expects flags in a custom location",
	Run: func(cmd *Command, args []string) {
	},
}

var cmdVersion1 = &Command{
	Use:   "version",
	Short: "Print the version number",
	Long:  `First version of the version command`,
	Run: func(cmd *Command, args []string) {
		versionUsed = 1
	},
}

var cmdVersion2 = &Command{
	Use:   "version",
	Short: "Print the version number",
	Long:  `Second version of the version command`,
	Run: func(cmd *Command, args []string) {
		versionUsed = 2
	},
}

var cmdColon = &Command{
	Use: "cmd:colon",
	Run: func(cmd *Command, args []string) {
	},
}

func flagInit() {
	cmdEcho.ResetFlags()
	cmdPrint.ResetFlags()
	cmdTimes.ResetFlags()
	cmdRootNoRun.ResetFlags()
	cmdRootSameName.ResetFlags()
	cmdRootWithRun.ResetFlags()
	cmdSubNoRun.ResetFlags()
	cmdCustomFlags.ResetFlags()
	cmdVersion1.ResetFlags()
	cmdVersion2.ResetFlags()

	cmdRootNoRun.PersistentFlags().StringVarP(&flags2a, "strtwo", "t", "two", strtwoParentHelp)
	cmdCustomFlags.Flags().IntVar(&flagi4, "intfour", 456, "help message for flag intfour")
	cmdEcho.Flags().BoolVarP(&flagb1, "boolone", "b", true, "help message for flag boolone")
	cmdEcho.Flags().IntVarP(&flagi1, "intone", "i", 123, "help message for flag intone")
	cmdEcho.PersistentFlags().BoolVarP(&flagbp, "persistentbool", "p", false, "help message for flag persistentbool")
	cmdEcho.PersistentFlags().StringVarP(&flags1, "strone", "s", "one", "help message for flag strone")
	cmdPrint.Flags().IntVarP(&flagi3, "intthree", "i", 345, "help message for flag intthree")
	cmdTimes.Flags().BoolVarP(&flagb2, "booltwo", "c", false, "help message for flag booltwo")
	cmdTimes.Flags().IntVarP(&flagi2, "inttwo", "j", 234, "help message for flag inttwo")
	cmdTimes.Flags().StringVarP(&flags2b, "strtwo", "t", "2", strtwoChildHelp)
	cmdTimes.PersistentFlags().StringVarP(&flags2b, "strtwo", "t", "2", strtwoChildHelp)
	cmdTimes.LocalFlags() // populate lflags before parent is set
	cmdPrint.Flags().BoolVarP(&flagb3, "boolthree", "b", true, "help message for flag boolthree")
	cmdPrint.PersistentFlags().StringVarP(&flags3, "strthree", "s", "three", "help message for flag strthree")
}

func commandInit() {
	cmdEcho.ResetCommands()
	cmdPrint.ResetCommands()
	cmdTimes.ResetCommands()
	cmdRootNoRun.ResetCommands()
	cmdRootSameName.ResetCommands()
	cmdRootWithRun.ResetCommands()
	cmdSubNoRun.ResetCommands()
	cmdCustomFlags.ResetCommands()
}

func initialize() *Command {
	tt, tp, te = nil, nil, nil
	rootPersPre, echoPre, echoPersPre, timesPersPre = nil, nil, nil, nil

	var c = cmdRootNoRun
	commandInit()
	flagInit()
	return c
}

func initializeWithSameName() *Command {
	tt, tp, te = nil, nil, nil
	rootPersPre, echoPre, echoPersPre, timesPersPre = nil, nil, nil, nil
	var c = cmdRootSameName
	commandInit()
	flagInit()
	return c
}

func initializeWithRootCmd() *Command {
	cmdRootWithRun.ResetCommands()
	tt, tp, te, tr, rootcalled = nil, nil, nil, nil, false
	flagInit()
	cmdRootWithRun.Flags().BoolVarP(&flagbr, "boolroot", "b", false, "help message for flag boolroot")
	cmdRootWithRun.Flags().IntVarP(&flagir, "introot", "i", 321, "help message for flag introot")
	commandInit()
	return cmdRootWithRun
}

type resulter struct {
	Error   error
	Output  string
	Command *Command
}

func fullSetupTest(args ...string) resulter {
	c := initializeWithRootCmd()

	return fullTester(c, args...)
}

func noRRSetupTestSilenced(args ...string) resulter {
	c := initialize()
	c.SilenceErrors = true
	c.SilenceUsage = true
	return fullTester(c, args...)
}

func noRRSetupTest(args ...string) resulter {
	c := initialize()

	return fullTester(c, args...)
}

func rootOnlySetupTest(args ...string) resulter {
	c := initializeWithRootCmd()

	return simpleTester(c, args...)
}

func simpleTester(c *Command, args ...string) resulter {
	buf := new(bytes.Buffer)
	// Testing flag with invalid input
	c.SetOutput(buf)
	c.SetArgs(args)

	err := c.Execute()
	output := buf.String()

	return resulter{err, output, c}
}

func simpleTesterC(c *Command, args ...string) resulter {
	buf := new(bytes.Buffer)
	// Testing flag with invalid input
	c.SetOutput(buf)
	c.SetArgs(args)

	cmd, err := c.ExecuteC()
	output := buf.String()

	return resulter{err, output, cmd}
}

func fullTester(c *Command, args ...string) resulter {
	buf := new(bytes.Buffer)
	// Testing flag with invalid input
	c.SetOutput(buf)
	cmdEcho.AddCommand(cmdTimes)
	c.AddCommand(cmdPrint, cmdEcho, cmdSubNoRun, cmdCustomFlags, cmdDeprecated)
	c.SetArgs(args)

	err := c.Execute()
	output := buf.String()

	return resulter{err, output, c}
}

func logErr(t *testing.T, found, expected string) {
	out := new(bytes.Buffer)

	_, _, line, ok := runtime.Caller(2)
	if ok {
		fmt.Fprintf(out, "Line: %d ", line)
	}
	fmt.Fprintf(out, "Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
	t.Errorf(out.String())
}

func checkStringContains(t *testing.T, found, expected string) {
	if !strings.Contains(found, expected) {
		logErr(t, found, expected)
	}
}

func checkResultContains(t *testing.T, x resulter, check string) {
	checkStringContains(t, x.Output, check)
}

func checkStringOmits(t *testing.T, found, expected string) {
	if strings.Contains(found, expected) {
		logErr(t, found, expected)
	}
}

func checkResultOmits(t *testing.T, x resulter, check string) {
	checkStringOmits(t, x.Output, check)
}

func checkOutputContains(t *testing.T, c *Command, check string) {
	buf := new(bytes.Buffer)
	c.SetOutput(buf)
	c.Execute()

	if !strings.Contains(buf.String(), check) {
		logErr(t, buf.String(), check)
	}
}

func TestSingleCommand(t *testing.T) {
	noRRSetupTest("print", "one", "two")

	if te != nil || tt != nil {
		t.Error("Wrong command called")
	}
	if tp == nil {
		t.Error("Wrong command called")
	}
	if strings.Join(tp, " ") != "one two" {
		t.Error("Command didn't parse correctly")
	}
}

func TestChildCommand(t *testing.T) {
	noRRSetupTest("echo", "times", "one", "two")

	if te != nil || tp != nil {
		t.Error("Wrong command called")
	}
	if tt == nil {
		t.Error("Wrong command called")
	}
	if strings.Join(tt, " ") != "one two" {
		t.Error("Command didn't parse correctly")
	}
}

func TestCommandAlias(t *testing.T) {
	noRRSetupTest("say", "times", "one", "two")

	if te != nil || tp != nil {
		t.Error("Wrong command called")
	}
	if tt == nil {
		t.Error("Wrong command called")
	}
	if strings.Join(tt, " ") != "one two" {
		t.Error("Command didn't parse correctly")
	}
}

func TestPrefixMatching(t *testing.T) {
	EnablePrefixMatching = true
	noRRSetupTest("ech", "times", "one", "two")

	if te != nil || tp != nil {
		t.Error("Wrong command called")
	}
	if tt == nil {
		t.Error("Wrong command called")
	}
	if strings.Join(tt, " ") != "one two" {
		t.Error("Command didn't parse correctly")
	}

	EnablePrefixMatching = false
}

func TestNoPrefixMatching(t *testing.T) {
	EnablePrefixMatching = false

	noRRSetupTest("ech", "times", "one", "two")

	if !(tt == nil && te == nil && tp == nil) {
		t.Error("Wrong command called")
	}
}

func TestAliasPrefixMatching(t *testing.T) {
	EnablePrefixMatching = true
	noRRSetupTest("sa", "times", "one", "two")

	if te != nil || tp != nil {
		t.Error("Wrong command called")
	}
	if tt == nil {
		t.Error("Wrong command called")
	}
	if strings.Join(tt, " ") != "one two" {
		t.Error("Command didn't parse correctly")
	}
	EnablePrefixMatching = false
}

func TestChildSameName(t *testing.T) {
	c := initializeWithSameName()
	c.AddCommand(cmdPrint, cmdEcho)
	c.SetArgs([]string{"print", "one", "two"})
	c.Execute()

	if te != nil || tt != nil {
		t.Error("Wrong command called")
	}
	if tp == nil {
		t.Error("Wrong command called")
	}
	if strings.Join(tp, " ") != "one two" {
		t.Error("Command didn't parse correctly")
	}
}

func TestGrandChildSameName(t *testing.T) {
	c := initializeWithSameName()
	cmdTimes.AddCommand(cmdPrint)
	c.AddCommand(cmdTimes)
	c.SetArgs([]string{"times", "print", "one", "two"})
	c.Execute()

	if te != nil || tt != nil {
		t.Error("Wrong command called")
	}
	if tp == nil {
		t.Error("Wrong command called")
	}
	if strings.Join(tp, " ") != "one two" {
		t.Error("Command didn't parse correctly")
	}
}

func TestUsage(t *testing.T) {
	x := fullSetupTest("help")
	checkResultContains(t, x, cmdRootWithRun.Use+" [flags]")
	x = fullSetupTest("help", "customflags")
	checkResultContains(t, x, cmdCustomFlags.Use)
	checkResultOmits(t, x, cmdCustomFlags.Use+" [flags]")
}

func TestRootTakesNoArgs(t *testing.T) {
	c := initializeWithSameName()
	c.AddCommand(cmdPrint, cmdEcho)
	result := simpleTester(c, "illegal")

	if result.Error == nil {
		t.Fatal("Expected an error")
	}

	expectedError := `unknown command "illegal" for "print"`
	if !strings.Contains(result.Error.Error(), expectedError) {
		t.Errorf("exptected %v, got %v", expectedError, result.Error.Error())
	}
}

func TestRootTakesArgs(t *testing.T) {
	c := cmdRootTakesArgs
	result := simpleTester(c, "legal")

	if result.Error != nil {
		t.Errorf("expected no error, but got %v", result.Error)
	}
}

func TestSubCmdTakesNoArgs(t *testing.T) {
	result := fullSetupTest("deprecated", "illegal")

	if result.Error == nil {
		t.Fatal("Expected an error")
	}

	expectedError := `unknown command "illegal" for "cobra-test deprecated"`
	if !strings.Contains(result.Error.Error(), expectedError) {
		t.Errorf("expected %v, got %v", expectedError, result.Error.Error())
	}
}

func TestSubCmdTakesArgs(t *testing.T) {
	noRRSetupTest("echo", "times", "one", "two")
	if strings.Join(tt, " ") != "one two" {
		t.Error("Command didn't parse correctly")
	}
}

func TestCmdOnlyValidArgs(t *testing.T) {
	result := noRRSetupTest("echo", "times", "one", "two", "five")

	if result.Error == nil {
		t.Fatal("Expected an error")
	}

	expectedError := `invalid argument "five"`
	if !strings.Contains(result.Error.Error(), expectedError) {
		t.Errorf("expected %v, got %v", expectedError, result.Error.Error())
	}
}

func TestFlagLong(t *testing.T) {
	noRRSetupTest("echo", "--intone=13", "something", "--", "here")

	if cmdEcho.ArgsLenAtDash() != 1 {
		t.Errorf("expected argsLenAtDash: %d but got %d", 1, cmdRootNoRun.ArgsLenAtDash())
	}
	if strings.Join(te, " ") != "something here" {
		t.Errorf("flags didn't leave proper args remaining..%s given", te)
	}
	if flagi1 != 13 {
		t.Errorf("int flag didn't get correct value, had %d", flagi1)
	}
	if flagi2 != 234 {
		t.Errorf("default flag value changed, 234 expected, %d given", flagi2)
	}
}

func TestFlagShort(t *testing.T) {
	noRRSetupTest("echo", "-i13", "--", "something", "here")

	if cmdEcho.ArgsLenAtDash() != 0 {
		t.Errorf("expected argsLenAtDash: %d but got %d", 0, cmdRootNoRun.ArgsLenAtDash())
	}
	if strings.Join(te, " ") != "something here" {
		t.Errorf("flags didn't leave proper args remaining..%s given", te)
	}
	if flagi1 != 13 {
		t.Errorf("int flag didn't get correct value, had %d", flagi1)
	}
	if flagi2 != 234 {
		t.Errorf("default flag value changed, 234 expected, %d given", flagi2)
	}

	noRRSetupTest("echo", "-i", "13", "something", "here")

	if strings.Join(te, " ") != "something here" {
		t.Errorf("flags didn't leave proper args remaining..%s given", te)
	}
	if flagi1 != 13 {
		t.Errorf("int flag didn't get correct value, had %d", flagi1)
	}
	if flagi2 != 234 {
		t.Errorf("default flag value changed, 234 expected, %d given", flagi2)
	}

	noRRSetupTest("print", "-i99", "one", "two")

	if strings.Join(tp, " ") != "one two" {
		t.Errorf("flags didn't leave proper args remaining..%s given", tp)
	}
	if flagi3 != 99 {
		t.Errorf("int flag didn't get correct value, had %d", flagi3)
	}
	if flagi1 != 123 {
		t.Errorf("default flag value changed on different command with same shortname, 234 expected, %d given", flagi2)
	}
}

func TestChildCommandFlags(t *testing.T) {
	noRRSetupTest("echo", "times", "-j", "99", "one", "two")

	if strings.Join(tt, " ") != "one two" {
		t.Errorf("flags didn't leave proper args remaining..%s given", tt)
	}

	// Testing with flag that shouldn't be persistent
	r := noRRSetupTest("echo", "times", "-j", "99", "-i77", "one", "two")

	if r.Error == nil {
		t.Errorf("invalid flag should generate error")
	}

	if !strings.Contains(r.Error.Error(), "unknown shorthand") {
		t.Errorf("Wrong error message displayed, \n %s", r.Error)
	}

	if flagi2 != 99 {
		t.Errorf("flag value should be 99, %d given", flagi2)
	}

	if flagi1 != 123 {
		t.Errorf("unset flag should have default value, expecting 123, given %d", flagi1)
	}

	// Testing with flag only existing on child
	r = noRRSetupTest("echo", "-j", "99", "-i77", "one", "two")

	if r.Error == nil {
		t.Errorf("invalid flag should generate error")
	}
	if !strings.Contains(r.Error.Error(), "unknown shorthand flag") {
		t.Errorf("Wrong error message displayed, \n %s", r.Error)
	}

	// Testing with persistent flag overwritten by child
	noRRSetupTest("echo", "times", "--strtwo=child", "one", "two")

	if flags2b != "child" {
		t.Errorf("flag value should be child, %s given", flags2b)
	}

	if flags2a != "two" {
		t.Errorf("unset flag should have default value, expecting two, given %s", flags2a)
	}

	// Testing flag with invalid input
	r = noRRSetupTest("echo", "-i10E")

	if r.Error == nil {
		t.Errorf("invalid input should generate error")
	}
	if !strings.Contains(r.Error.Error(), "invalid syntax") {
		t.Errorf("Wrong error message displayed, \n %s", r.Error)
	}
}

func TestTrailingCommandFlags(t *testing.T) {
	x := fullSetupTest("echo", "two", "-x")

	if x.Error == nil {
		t.Errorf("invalid flag should generate error")
	}
}

func TestInvalidSubcommandFlags(t *testing.T) {
	cmd := initializeWithRootCmd()
	cmd.AddCommand(cmdTimes)

	result := simpleTester(cmd, "times", "--inttwo=2", "--badflag=bar")
	// given that we are not checking here result.Error we check for
	// stock usage message
	checkResultContains(t, result, "cobra-test times [# times]")
	if strings.Contains(result.Error.Error(), "unknown flag: --inttwo") {
		t.Errorf("invalid --badflag flag shouldn't fail on 'unknown' --inttwo flag")
	}

}

func TestSubcommandExecuteC(t *testing.T) {
	cmd := initializeWithRootCmd()
	double := &Command{
		Use: "double message",
		Run: func(c *Command, args []string) {
			msg := strings.Join(args, " ")
			c.Println(msg, msg)
		},
	}

	echo := &Command{
		Use: "echo message",
		Run: func(c *Command, args []string) {
			msg := strings.Join(args, " ")
			c.Println(msg)
		},
	}

	cmd.AddCommand(double, echo)

	result := simpleTesterC(cmd, "double", "hello", "world")
	checkResultContains(t, result, "hello world hello world")

	if result.Command.Name() != "double" {
		t.Errorf("invalid cmd returned from ExecuteC: should be 'double' but got %s", result.Command.Name())
	}

	result = simpleTesterC(cmd, "echo", "msg", "to", "be", "echoed")
	checkResultContains(t, result, "msg to be echoed")

	if result.Command.Name() != "echo" {
		t.Errorf("invalid cmd returned from ExecuteC: should be 'echo' but got %s", result.Command.Name())
	}
}

func TestSubcommandArgEvaluation(t *testing.T) {
	cmd := initializeWithRootCmd()

	first := &Command{
		Use: "first",
		Run: func(cmd *Command, args []string) {
		},
	}
	cmd.AddCommand(first)

	second := &Command{
		Use: "second",
		Run: func(cmd *Command, args []string) {
			fmt.Fprintf(cmd.OutOrStdout(), "%v", args)
		},
	}
	first.AddCommand(second)

	result := simpleTester(cmd, "first", "second", "first", "third")

	expectedOutput := fmt.Sprint([]string{"first third"})
	if result.Output != expectedOutput {
		t.Errorf("exptected %v, got %v", expectedOutput, result.Output)
	}
}

func TestPersistentFlags(t *testing.T) {
	fullSetupTest("echo", "-s", "something", "-p", "more", "here")

	// persistentFlag should act like normal flag on its own command
	if strings.Join(te, " ") != "more here" {
		t.Errorf("flags didn't leave proper args remaining..%s given", te)
	}
	if flags1 != "something" {
		t.Errorf("string flag didn't get correct value, had %v", flags1)
	}
	if !flagbp {
		t.Errorf("persistent bool flag not parsed correctly. Expected true, had %v", flagbp)
	}

	// persistentFlag should act like normal flag on its own command
	fullSetupTest("echo", "times", "-s", "again", "-c", "-p", "one", "two")

	if strings.Join(tt, " ") != "one two" {
		t.Errorf("flags didn't leave proper args remaining. %s given", tt)
	}

	if flags1 != "again" {
		t.Errorf("string flag didn't get correct value, had %v", flags1)
	}

	if !flagb2 {
		t.Errorf("local flag not parsed correctly. Expected true, had %v", flagb2)
	}
	if !flagbp {
		t.Errorf("persistent bool flag not parsed correctly. Expected true, had %v", flagbp)
	}
}

func TestHelpCommand(t *testing.T) {
	x := fullSetupTest("help")
	checkResultContains(t, x, cmdRootWithRun.Long)

	x = fullSetupTest("help", "echo")
	checkResultContains(t, x, cmdEcho.Long)

	x = fullSetupTest("help", "echo", "times")
	checkResultContains(t, x, cmdTimes.Long)
}

func TestChildCommandHelp(t *testing.T) {
	c := noRRSetupTest("print", "--help")
	checkResultContains(t, c, strtwoParentHelp)
	r := noRRSetupTest("echo", "times", "--help")
	checkResultContains(t, r, strtwoChildHelp)
}

func TestNonRunChildHelp(t *testing.T) {
	x := noRRSetupTest("subnorun")
	checkResultContains(t, x, cmdSubNoRun.Long)
}

func TestRunnableRootCommand(t *testing.T) {
	x := fullSetupTest("")

	if !rootcalled {
		t.Errorf("Root Function was not called\n out:%v", x.Error)
	}
}

func TestVisitParents(t *testing.T) {
	c := &Command{Use: "app"}
	sub := &Command{Use: "sub"}
	dsub := &Command{Use: "dsub"}
	sub.AddCommand(dsub)
	c.AddCommand(sub)
	total := 0
	add := func(x *Command) {
		total++
	}
	sub.VisitParents(add)
	if total != 1 {
		t.Errorf("Should have visited 1 parent but visited %d", total)
	}

	total = 0
	dsub.VisitParents(add)
	if total != 2 {
		t.Errorf("Should have visited 2 parent but visited %d", total)
	}

	total = 0
	c.VisitParents(add)
	if total != 0 {
		t.Errorf("Should have not visited any parent but visited %d", total)
	}
}

func TestRunnableRootCommandNilInput(t *testing.T) {
	c := initializeWithRootCmd()

	buf := new(bytes.Buffer)
	// Testing flag with invalid input
	c.SetOutput(buf)
	cmdEcho.AddCommand(cmdTimes)
	c.AddCommand(cmdPrint, cmdEcho)
	c.SetArgs([]string{})

	err := c.Execute()
	if err != nil {
		t.Errorf("Execute() failed with %v", err)
	}

	if !rootcalled {
		t.Errorf("Root Function was not called")
	}
}

func TestRunnableRootCommandEmptyInput(t *testing.T) {
	args := []string{"", "--introot=12", ""}
	c := initializeWithRootCmd()

	buf := new(bytes.Buffer)
	// Testing flag with invalid input
	c.SetOutput(buf)
	cmdEcho.AddCommand(cmdTimes)
	c.AddCommand(cmdPrint, cmdEcho)
	c.SetArgs(args)

	c.Execute()

	if !rootcalled {
		t.Errorf("Root Function was not called.\nOutput was:\n%s\n", buf)
	}
}

func TestInvalidSubcommandWhenArgsAllowed(t *testing.T) {
	fullSetupTest("echo", "invalid-sub")

	if te[0] != "invalid-sub" {
		t.Errorf("Subcommand didn't work...")
	}
}

func TestRootFlags(t *testing.T) {
	fullSetupTest("-i", "17", "-b")

	if !flagbr {
		t.Errorf("flag value should be true, %v given", flagbr)
	}

	if flagir != 17 {
		t.Errorf("flag value should be 17, %d given", flagir)
	}
}

func TestRootHelp(t *testing.T) {
	x := fullSetupTest("--help")

	checkResultContains(t, x, "Available Commands:")
	checkResultContains(t, x, "for more information about a command")

	if strings.Contains(x.Output, "unknown flag: --help") {
		t.Errorf("--help shouldn't trigger an error, Got: \n %s", x.Output)
	}

	if strings.Contains(x.Output, cmdEcho.Use) {
		t.Errorf("--help shouldn't display subcommand's usage, Got: \n %s", x.Output)
	}

	x = fullSetupTest("echo", "--help")

	if strings.Contains(x.Output, cmdTimes.Use) {
		t.Errorf("--help shouldn't display subsubcommand's usage, Got: \n %s", x.Output)
	}

	checkResultContains(t, x, "Available Commands:")
	checkResultContains(t, x, "for more information about a command")

	if strings.Contains(x.Output, "unknown flag: --help") {
		t.Errorf("--help shouldn't trigger an error, Got: \n %s", x.Output)
	}

}

func TestFlagAccess(t *testing.T) {
	initialize()

	cmdEcho.AddCommand(cmdTimes)
	local := cmdTimes.LocalFlags()
	inherited := cmdTimes.InheritedFlags()

	for _, f := range []string{"inttwo", "strtwo", "booltwo"} {
		if local.Lookup(f) == nil {
			t.Errorf("LocalFlags expected to contain %s, Got: nil", f)
		}
	}
	if inherited.Lookup("strone") == nil {
		t.Errorf("InheritedFlags expected to contain strone, Got: nil")
	}
	if inherited.Lookup("strtwo") != nil {
		t.Errorf("InheritedFlags shouldn not contain overwritten flag strtwo")
	}
}

func TestNoNRunnableRootCommandNilInput(t *testing.T) {
	c := initialize()

	buf := new(bytes.Buffer)
	// Testing flag with invalid input
	c.SetOutput(buf)
	cmdEcho.AddCommand(cmdTimes)
	c.AddCommand(cmdPrint, cmdEcho)
	c.SetArgs([]string{})

	c.Execute()

	if !strings.Contains(buf.String(), cmdRootNoRun.Long) {
		t.Errorf("Expected to get help output, Got: \n %s", buf)
	}
}

func TestRootNoCommandHelp(t *testing.T) {
	x := rootOnlySetupTest("--help")

	checkResultOmits(t, x, "Available Commands:")
	checkResultOmits(t, x, "for more information about a command")

	if strings.Contains(x.Output, "unknown flag: --help") {
		t.Errorf("--help shouldn't trigger an error, Got: \n %s", x.Output)
	}

	x = rootOnlySetupTest("echo", "--help")

	checkResultOmits(t, x, "Available Commands:")
	checkResultOmits(t, x, "for more information about a command")

	if strings.Contains(x.Output, "unknown flag: --help") {
		t.Errorf("--help shouldn't trigger an error, Got: \n %s", x.Output)
	}
}

func TestRootUnknownCommand(t *testing.T) {
	r := noRRSetupTest("bogus")
	s := "Error: unknown command \"bogus\" for \"cobra-test\"\nRun 'cobra-test --help' for usage.\n"

	if r.Output != s {
		t.Errorf("Unexpected response.\nExpecting to be:\n %q\nGot:\n %q\n", s, r.Output)
	}

	r = noRRSetupTest("--strtwo=a", "bogus")
	if r.Output != s {
		t.Errorf("Unexpected response.\nExpecting to be:\n %q\nGot:\n %q\n", s, r.Output)
	}
}

func TestRootUnknownCommandSilenced(t *testing.T) {
	r := noRRSetupTestSilenced("bogus")

	if r.Output != "" {
		t.Errorf("Unexpected response.\nExpecting to be: \n\"\"\n Got:\n %q\n", r.Output)
	}

	r = noRRSetupTestSilenced("--strtwo=a", "bogus")
	if r.Output != "" {
		t.Errorf("Unexpected response.\nExpecting to be:\n\"\"\nGot:\n %q\n", r.Output)
	}
}

func TestRootSuggestions(t *testing.T) {
	outputWithSuggestions := "Error: unknown command \"%s\" for \"cobra-test\"\n\nDid you mean this?\n\t%s\n\nRun 'cobra-test --help' for usage.\n"
	outputWithoutSuggestions := "Error: unknown command \"%s\" for \"cobra-test\"\nRun 'cobra-test --help' for usage.\n"

	cmd := initializeWithRootCmd()
	cmd.AddCommand(cmdTimes)

	tests := map[string]string{
		"time":     "times",
		"tiems":    "times",
		"tims":     "times",
		"timeS":    "times",
		"rimes":    "times",
		"ti":       "times",
		"t":        "times",
		"timely":   "times",
		"ri":       "",
		"timezone": "",
		"foo":      "",
		"counts":   "times",
	}

	for typo, suggestion := range tests {
		for _, suggestionsDisabled := range []bool{false, true} {
			cmd.DisableSuggestions = suggestionsDisabled
			result := simpleTester(cmd, typo)
			expected := ""
			if len(suggestion) == 0 || suggestionsDisabled {
				expected = fmt.Sprintf(outputWithoutSuggestions, typo)
			} else {
				expected = fmt.Sprintf(outputWithSuggestions, typo, suggestion)
			}
			if result.Output != expected {
				t.Errorf("Unexpected response.\nExpecting to be:\n %q\nGot:\n %q\n", expected, result.Output)
			}
		}
	}
}

func TestFlagsBeforeCommand(t *testing.T) {
	// short without space
	x := fullSetupTest("-i10", "echo")
	if x.Error != nil {
		t.Errorf("Valid Input shouldn't have errors, got:\n %q", x.Error)
	}

	x = noRRSetupTest("echo", "-i=10")
	if x.Error != nil {
		t.Errorf("Valid Input shouldn't have errors, got:\n %s", x.Error)
	}

	// long with equals
	x = noRRSetupTest("--intone=123", "echo", "one", "two")
	if x.Error != nil {
		t.Errorf("Valid Input shouldn't have errors, got:\n %s", x.Error)
	}

	// With parsing error properly reported
	x = fullSetupTest("-i10E", "echo")
	if !strings.Contains(x.Error.Error(), "invalid syntax") {
		t.Errorf("Wrong error message displayed, \n %s", x.Error)
	}
}

func TestRemoveCommand(t *testing.T) {
	versionUsed = 0
	c := initializeWithRootCmd()
	c.AddCommand(cmdVersion1)
	c.RemoveCommand(cmdVersion1)
	x := fullTester(c, "version")
	if x.Error == nil {
		t.Errorf("Removed command should not have been called\n")
		return
	}
}

func TestCommandWithoutSubcommands(t *testing.T) {
	c := initializeWithRootCmd()

	x := simpleTester(c, "")
	if x.Error != nil {
		t.Errorf("Calling command without subcommands should not have error: %v", x.Error)
		return
	}
}

func TestCommandWithoutSubcommandsWithArg(t *testing.T) {
	c := initializeWithRootCmd()
	expectedArgs := []string{"arg"}

	x := simpleTester(c, "arg")
	if x.Error != nil {
		t.Errorf("Calling command without subcommands but with arg should not have error: %v", x.Error)
		return
	}
	if !reflect.DeepEqual(expectedArgs, tr) {
		t.Errorf("Calling command without subcommands but with arg has wrong args: expected: %v, actual: %v", expectedArgs, tr)
		return
	}
}

func TestReplaceCommandWithRemove(t *testing.T) {
	versionUsed = 0
	c := initializeWithRootCmd()
	c.AddCommand(cmdVersion1)
	c.RemoveCommand(cmdVersion1)
	c.AddCommand(cmdVersion2)
	x := fullTester(c, "version")
	if x.Error != nil {
		t.Errorf("Valid Input shouldn't have errors, got:\n %q", x.Error)
		return
	}
	if versionUsed == 1 {
		t.Errorf("Removed command shouldn't be called\n")
	}
	if versionUsed != 2 {
		t.Errorf("Replacing command should have been called but didn't\n")
	}
}

func TestDeprecatedSub(t *testing.T) {
	c := fullSetupTest("deprecated")

	checkResultContains(t, c, cmdDeprecated.Deprecated)
}

func TestPreRun(t *testing.T) {
	noRRSetupTest("echo", "one", "two")
	if echoPre == nil || echoPersPre == nil {
		t.Error("PreRun or PersistentPreRun not called")
	}
	if rootPersPre != nil || timesPersPre != nil {
		t.Error("Wrong *Pre functions called!")
	}

	noRRSetupTest("echo", "times", "one", "two")
	if timesPersPre == nil {
		t.Error("PreRun or PersistentPreRun not called")
	}
	if echoPre != nil || echoPersPre != nil || rootPersPre != nil {
		t.Error("Wrong *Pre functions called!")
	}

	noRRSetupTest("print", "one", "two")
	if rootPersPre == nil {
		t.Error("Parent PersistentPreRun not called but should not have been")
	}
	if echoPre != nil || echoPersPre != nil || timesPersPre != nil {
		t.Error("Wrong *Pre functions called!")
	}
}

// Check if cmdEchoSub gets PersistentPreRun from rootCmd even if is added last
func TestPeristentPreRunPropagation(t *testing.T) {
	rootCmd := initialize()

	// First add the cmdEchoSub to cmdPrint
	cmdPrint.AddCommand(cmdEchoSub)
	// Now add cmdPrint to rootCmd
	rootCmd.AddCommand(cmdPrint)

	rootCmd.SetArgs([]string{"print", "echosub", "lala"})
	rootCmd.Execute()

	if len(rootPersPre) == 0 || rootPersPre[0] != "lala" {
		t.Error("RootCmd PersistentPreRun not called but should have been")
	}
}

func TestGlobalNormFuncPropagation(t *testing.T) {
	normFunc := func(f *pflag.FlagSet, name string) pflag.NormalizedName {
		return pflag.NormalizedName(name)
	}

	rootCmd := initialize()
	rootCmd.AddCommand(cmdEcho)

	rootCmd.SetGlobalNormalizationFunc(normFunc)
	if reflect.ValueOf(normFunc).Pointer() != reflect.ValueOf(rootCmd.GlobalNormalizationFunc()).Pointer() {
		t.Error("rootCmd seems to have a wrong normalization function")
	}

	// Also check it propagates retroactively
	if reflect.ValueOf(normFunc).Pointer() != reflect.ValueOf(cmdEcho.GlobalNormalizationFunc()).Pointer() {
		t.Error("cmdEcho should have had the normalization function of rootCmd")
	}

	// First add the cmdEchoSub to cmdPrint
	cmdPrint.AddCommand(cmdEchoSub)
	if cmdPrint.GlobalNormalizationFunc() != nil && cmdEchoSub.GlobalNormalizationFunc() != nil {
		t.Error("cmdPrint and cmdEchoSub should had no normalization functions")
	}

	// Now add cmdPrint to rootCmd
	rootCmd.AddCommand(cmdPrint)
	if reflect.ValueOf(cmdPrint.GlobalNormalizationFunc()).Pointer() != reflect.ValueOf(rootCmd.GlobalNormalizationFunc()).Pointer() ||
		reflect.ValueOf(cmdEchoSub.GlobalNormalizationFunc()).Pointer() != reflect.ValueOf(rootCmd.GlobalNormalizationFunc()).Pointer() {
		t.Error("cmdPrint and cmdEchoSub should had the normalization function of rootCmd")
	}
}

func TestNormPassedOnLocal(t *testing.T) {
	n := func(f *pflag.FlagSet, name string) pflag.NormalizedName {
		return pflag.NormalizedName(strings.ToUpper(name))
	}

	cmd := &Command{}
	flagVal := false

	cmd.Flags().BoolVar(&flagVal, "flagname", true, "this is a dummy flag")
	cmd.SetGlobalNormalizationFunc(n)
	if cmd.LocalFlags().Lookup("flagname") != cmd.LocalFlags().Lookup("FLAGNAME") {
		t.Error("Normalization function should be passed on to Local flag set")
	}
}

func TestNormPassedOnInherited(t *testing.T) {
	n := func(f *pflag.FlagSet, name string) pflag.NormalizedName {
		return pflag.NormalizedName(strings.ToUpper(name))
	}

	cmd, childBefore, childAfter := &Command{}, &Command{}, &Command{}
	flagVal := false
	cmd.AddCommand(childBefore)

	cmd.PersistentFlags().BoolVar(&flagVal, "flagname", true, "this is a dummy flag")
	cmd.SetGlobalNormalizationFunc(n)

	cmd.AddCommand(childAfter)

	if f := childBefore.InheritedFlags(); f.Lookup("flagname") == nil || f.Lookup("flagname") != f.Lookup("FLAGNAME") {
		t.Error("Normalization function should be passed on to inherited flag set in command added before flag")
	}
	if f := childAfter.InheritedFlags(); f.Lookup("flagname") == nil || f.Lookup("flagname") != f.Lookup("FLAGNAME") {
		t.Error("Normalization function should be passed on to inherited flag set in command added after flag")
	}
}

// Related to https://github.com/spf13/cobra/issues/521.
func TestNormConsistent(t *testing.T) {
	n := func(f *pflag.FlagSet, name string) pflag.NormalizedName {
		return pflag.NormalizedName(strings.ToUpper(name))
	}
	id := func(f *pflag.FlagSet, name string) pflag.NormalizedName {
		return pflag.NormalizedName(name)
	}

	cmd := &Command{}
	flagVal := false

	cmd.Flags().BoolVar(&flagVal, "flagname", true, "this is a dummy flag")
	// Build local flag set
	cmd.LocalFlags()

	cmd.SetGlobalNormalizationFunc(n)
	cmd.SetGlobalNormalizationFunc(id)

	if cmd.LocalFlags().Lookup("flagname") == cmd.LocalFlags().Lookup("FLAGNAME") {
		t.Error("Normalizing flag names should not result in duplicate flags")
	}
}

func TestFlagOnPflagCommandLine(t *testing.T) {
	flagName := "flagOnCommandLine"
	pflag.String(flagName, "", "about my flag")
	r := fullSetupTest("--help")

	checkResultContains(t, r, flagName)

	// Reset pflag.CommandLine flagset.
	pflag.CommandLine = pflag.NewFlagSet(os.Args[0], pflag.ExitOnError)
}

func TestAddTemplateFunctions(t *testing.T) {
	AddTemplateFunc("t", func() bool { return true })
	AddTemplateFuncs(template.FuncMap{
		"f": func() bool { return false },
		"h": func() string { return "Hello," },
		"w": func() string { return "world." }})

	const usage = "Hello, world."

	c := &Command{}
	c.SetUsageTemplate(`{{if t}}{{h}}{{end}}{{if f}}{{h}}{{end}} {{w}}`)

	if us := c.UsageString(); us != usage {
		t.Errorf("c.UsageString() != \"%s\", is \"%s\"", usage, us)
	}
}

func TestUsageIsNotPrintedTwice(t *testing.T) {
	var cmd = &Command{Use: "root"}
	var sub = &Command{Use: "sub"}
	cmd.AddCommand(sub)

	r := simpleTester(cmd, "")
	if strings.Count(r.Output, "Usage:") != 1 {
		t.Error("Usage output is not printed exactly once")
	}
}

func BenchmarkInheritedFlags(b *testing.B) {
	initialize()
	cmdEcho.AddCommand(cmdTimes)
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		cmdTimes.InheritedFlags()
	}
}

func BenchmarkLocalFlags(b *testing.B) {
	initialize()
	cmdEcho.AddCommand(cmdTimes)
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		cmdTimes.LocalFlags()
	}
}
