package pflag

import (

	"io"

	"strconv"

	"strings"

)

// -- boolSlice Value

type boolSliceValue struct {

	value   *[]bool

	changed bool

}

func newBoolSliceValue(val []bool, p *[]bool) *boolSliceValue {

	bsv := new(boolSliceValue)

	bsv.value = p

	*bsv.value = val

	return bsv

}

// Set converts, and assigns, the comma-separated boolean argument string representation as the []bool value of this flag.

// If Set is called on a flag that already has a []bool assigned, the newly converted values will be appended.

func (s *boolSliceValue) Set(val string) error {

	// remove all quote characters

	rmQuote := strings.NewReplacer(`"`, "", `'`, "", "`", "")

	// read flag arguments with CSV parser

	boolStrSlice, err := readAsCSV(rmQuote.Replace(val))

	if err != nil && err != io.EOF {

		return err

	}

	// parse boolean values into slice

	out := make([]bool, 0, len(boolStrSlice))

	for _, boolStr := range boolStrSlice {

		b, err := strconv.ParseBool(strings.TrimSpace(boolStr))

		if err != nil {

			return err

		}

		out = append(out, b)

	}

	if !s.changed {

		*s.value = out

	} else {

		*s.value = append(*s.value, out...)

	}

	s.changed = true

	return nil

}

// Type returns a string that uniquely represents this flag's type.

func (s *boolSliceValue) Type() string {

	return "boolSlice"

}

// String defines a "native" format for this boolean slice flag value.

func (s *boolSliceValue) String() string {

	boolStrSlice := make([]string, len(*s.value))

	for i, b := range *s.value {

		boolStrSlice[i] = strconv.FormatBool(b)

	}

	out, _ := writeAsCSV(boolStrSlice)

	return "[" + out + "]"

}

func boolSliceConv(val string) (interface{}, error) {

	val = strings.Trim(val, "[]")

	// Empty string would cause a slice with one (empty) entry

	if len(val) == 0 {

		return []bool{}, nil

	}

	ss := strings.Split(val, ",")

	out := make([]bool, len(ss))

	for i, t := range ss {

		var err error

		out[i], err = strconv.ParseBool(t)

		if err != nil {

			return nil, err

		}

	}

	return out, nil

}

// GetBoolSlice returns the []bool value of a flag with the given name.

func (f *FlagSet) GetBoolSlice(name string) ([]bool, error) {

	val, err := f.getFlagType(name, "boolSlice", boolSliceConv)

	if err != nil {

		return []bool{}, err

	}

	return val.([]bool), nil

}

// BoolSliceVar defines a boolSlice flag with specified name, default value, and usage string.

// The argument p points to a []bool variable in which to store the value of the flag.

func (f *FlagSet) BoolSliceVar(p *[]bool, name string, value []bool, usage string) {

	f.VarP(newBoolSliceValue(value, p), name, "", usage)

}

// BoolSliceVarP is like BoolSliceVar, but accepts a shorthand letter that can be used after a single dash.

func (f *FlagSet) BoolSliceVarP(p *[]bool, name, shorthand string, value []bool, usage string) {

	f.VarP(newBoolSliceValue(value, p), name, shorthand, usage)

}

// BoolSliceVar defines a []bool flag with specified name, default value, and usage string.

// The argument p points to a []bool variable in which to store the value of the flag.

func BoolSliceVar(p *[]bool, name string, value []bool, usage string) {

	CommandLine.VarP(newBoolSliceValue(value, p), name, "", usage)

}

// BoolSliceVarP is like BoolSliceVar, but accepts a shorthand letter that can be used after a single dash.

func BoolSliceVarP(p *[]bool, name, shorthand string, value []bool, usage string) {

	CommandLine.VarP(newBoolSliceValue(value, p), name, shorthand, usage)

}

// BoolSlice defines a []bool flag with specified name, default value, and usage string.

// The return value is the address of a []bool variable that stores the value of the flag.

func (f *FlagSet) BoolSlice(name string, value []bool, usage string) *[]bool {

	p := []bool{}

	f.BoolSliceVarP(&p, name, "", value, usage)

	return &p

}

// BoolSliceP is like BoolSlice, but accepts a shorthand letter that can be used after a single dash.

func (f *FlagSet) BoolSliceP(name, shorthand string, value []bool, usage string) *[]bool {

	p := []bool{}

	f.BoolSliceVarP(&p, name, shorthand, value, usage)

	return &p

}

// BoolSlice defines a []bool flag with specified name, default value, and usage string.

// The return value is the address of a []bool variable that stores the value of the flag.

func BoolSlice(name string, value []bool, usage string) *[]bool {

	return CommandLine.BoolSliceP(name, "", value, usage)

}

// BoolSliceP is like BoolSlice, but accepts a shorthand letter that can be used after a single dash.

func BoolSliceP(name, shorthand string, value []bool, usage string) *[]bool {

	return CommandLine.BoolSliceP(name, shorthand, value, usage)

}