package cobra

import (
	"context"
	"io"
	"reflect"
	"strings"
	"testing"
)

func TestParseRoutesBeforeOptionsAndKeepsFlagsLocal(t *testing.T) {
	tree := &Command{Name: "app", Children: []*Command{
		{Name: "config", Children: []*Command{
			{Name: "show", Runnable: true, Flags: []Flag{{Name: "scope"}}},
		}},
	}}

	result := Parse(tree, []string{"config", "show", "--scope", "app"}, ParseOptions{})
	if result.Failure != nil {
		t.Fatalf("parse failed: %s", result.Failure.Message)
	}
	if !reflect.DeepEqual(result.Path, []string{"config", "show"}) || !reflect.DeepEqual(result.FlagValues, [][]string{{"app"}}) {
		t.Fatalf("selected result = %#v", result)
	}

	result = Parse(tree, []string{"config", "--scope", "app", "show"}, ParseOptions{})
	if result.Failure == nil {
		t.Fatal("accepted a child flag before the complete command path")
	}
}

func TestParseInterspersedOperandsBooleanFlagsAndTerminator(t *testing.T) {
	tree := &Command{Name: "app", Children: []*Command{
		{Name: "restore", Runnable: true, Flags: []Flag{
			{Name: "enabled", Boolean: true},
			{Name: "tag", Repeated: true},
		}},
	}}
	result := Parse(tree, []string{"restore", "before", "--enabled", "--tag", "a,b", "--tag=c", "--", "--literal"}, ParseOptions{})
	if result.Failure != nil {
		t.Fatalf("parse failed: %s", result.Failure.Message)
	}
	if !reflect.DeepEqual(result.FlagValues, [][]string{{"true"}, {"a,b", "c"}}) {
		t.Fatalf("flag values = %#v", result.FlagValues)
	}
	if !reflect.DeepEqual(result.Operands, []string{"before", "--literal"}) {
		t.Fatalf("operands = %#v", result.Operands)
	}

	result = Parse(tree, []string{"restore", "--enabled=false"}, ParseOptions{})
	if result.Failure != nil || !reflect.DeepEqual(result.FlagValues[0], []string{"false"}) {
		t.Fatalf("explicit false = %#v", result)
	}
}

func TestParseHelpIsLocalAndFalseDoesNotRequestHelp(t *testing.T) {
	tree := &Command{Name: "app", Children: []*Command{
		{Name: "run", Runnable: true, Flags: []Flag{{Name: "required", Required: true}}},
	}}
	result := Parse(tree, []string{"run", "--help"}, ParseOptions{})
	if result.Failure != nil || !result.HelpRequested {
		t.Fatalf("help parse = %#v", result)
	}
	result = Parse(tree, []string{"run", "--help=false"}, ParseOptions{})
	if result.Failure != nil || result.HelpRequested {
		t.Fatalf("false help parse = %#v", result)
	}
	result = Parse(tree, []string{"run", "--help=1"}, ParseOptions{})
	if result.Failure != nil || !result.HelpRequested {
		t.Fatalf("strconv boolean help parse = %#v", result)
	}
	result = Parse(tree, []string{"run", "--help=invalid", "--help"}, ParseOptions{})
	if result.Failure == nil {
		t.Fatal("accepted an invalid earlier help occurrence")
	}
}

func TestParseRunnableParentAndGroupUnknownCommand(t *testing.T) {
	tree := &Command{Name: "app", Children: []*Command{
		{Name: "deploy", Runnable: true, Flags: []Flag{{Name: "scope"}}, Children: []*Command{{Name: "now", Runnable: true}}},
		{Name: "config", Children: []*Command{{Name: "show", Runnable: true}}},
	}}
	result := Parse(tree, []string{"deploy", "target"}, ParseOptions{})
	if result.Failure != nil || !reflect.DeepEqual(result.Path, []string{"deploy"}) || !reflect.DeepEqual(result.Operands, []string{"target"}) {
		t.Fatalf("runnable parent result = %#v", result)
	}
	result = Parse(tree, []string{"deploy", "--scope", "local"}, ParseOptions{})
	if result.Failure != nil || !reflect.DeepEqual(result.FlagValues, [][]string{{"local"}}) {
		t.Fatalf("runnable parent local flag = %#v", result)
	}
	result = Parse(tree, []string{"deploy", "now"}, ParseOptions{})
	if result.Failure != nil || !reflect.DeepEqual(result.Path, []string{"deploy", "now"}) {
		t.Fatalf("nested runnable child = %#v", result)
	}
	result = Parse(tree, []string{"config", "mystery"}, ParseOptions{})
	if result.Failure == nil {
		t.Fatal("accepted an unknown trailing command beneath a group")
	}
}

func TestParseReturnsNeutralFailuresAndFreshState(t *testing.T) {
	tree := &Command{Name: "app", Children: []*Command{
		{Name: "run", Runnable: true, Flags: []Flag{{Name: "value"}}},
	}}
	options := ParseOptions{Context: context.Background(), In: strings.NewReader("unused"), Out: io.Discard, Err: io.Discard}
	first := Parse(tree, []string{"run", "--value=old"}, options)
	second := Parse(tree, []string{"run"}, options)
	if first.Failure != nil || second.Failure != nil {
		t.Fatalf("parse results = %#v, %#v", first, second)
	}
	if !reflect.DeepEqual(first.FlagValues, [][]string{{"old"}}) || !reflect.DeepEqual(second.FlagValues, [][]string{nil}) {
		t.Fatalf("state leaked between parses: %#v then %#v", first.FlagValues, second.FlagValues)
	}
	failed := Parse(tree, []string{"run", "--unknown"}, options)
	if failed.Failure == nil || failed.Failure.Message == "" {
		t.Fatalf("unknown flag failure = %#v", failed.Failure)
	}
}