package pflag

import (

	"fmt"

	"strconv"

	"strings"

)

// -- float32Slice Value

type float32SliceValue struct {

	value   *[]float32

	changed bool

}

func newFloat32SliceValue(val []float32, p *[]float32) *float32SliceValue {

	isv := new(float32SliceValue)

	isv.value = p

	*isv.value = val

	return isv

}

func (s *float32SliceValue) Set(val string) error {

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

	out := make([]float32, len(ss))

	for i, d := range ss {

		var err error

		var temp64 float64

		temp64, err = strconv.ParseFloat(d, 32)

		if err != nil {

			return err

		}

		out[i] = float32(temp64)

	}

	if !s.changed {

		*s.value = out

	} else {

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

	}

	s.changed = true

	return nil

}

func (s *float32SliceValue) Type() string {

	return "float32Slice"

}

func (s *float32SliceValue) String() string {

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

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

		out[i] = fmt.Sprintf("%f", d)

	}

	return "[" + strings.Join(out, ",") + "]"

}

func (s *float32SliceValue) fromString(val string) (float32, error) {

	t64, err := strconv.ParseFloat(val, 32)

	if err != nil {

		return 0, err

	}

	return float32(t64), nil

}

func (s *float32SliceValue) toString(val float32) string {

	return fmt.Sprintf("%f", val)

}

func (s *float32SliceValue) Append(val string) error {

	i, err := s.fromString(val)

	if err != nil {

		return err

	}

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

	return nil

}

func (s *float32SliceValue) Replace(val []string) error {

	out := make([]float32, len(val))

	for i, d := range val {

		var err error

		out[i], err = s.fromString(d)

		if err != nil {

			return err

		}

	}

	*s.value = out

	return nil

}

func (s *float32SliceValue) GetSlice() []string {

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

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

		out[i] = s.toString(d)

	}

	return out

}

func float32SliceConv(val string) (interface{}, error) {

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

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

	if len(val) == 0 {

		return []float32{}, nil

	}

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

	out := make([]float32, len(ss))

	for i, d := range ss {

		var err error

		var temp64 float64

		temp64, err = strconv.ParseFloat(d, 32)

		if err != nil {

			return nil, err

		}

		out[i] = float32(temp64)

	}

	return out, nil

}

// GetFloat32Slice return the []float32 value of a flag with the given name

func (f *FlagSet) GetFloat32Slice(name string) ([]float32, error) {

	val, err := f.getFlagType(name, "float32Slice", float32SliceConv)

	if err != nil {

		return []float32{}, err

	}

	return val.([]float32), nil

}

// Float32SliceVar defines a float32Slice flag with specified name, default value, and usage string.

// The argument p points to a []float32 variable in which to store the value of the flag.

func (f *FlagSet) Float32SliceVar(p *[]float32, name string, value []float32, usage string) {

	f.VarP(newFloat32SliceValue(value, p), name, "", usage)

}

// Float32SliceVarP is like Float32SliceVar, but accepts a shorthand letter that can be used after a single dash.

func (f *FlagSet) Float32SliceVarP(p *[]float32, name, shorthand string, value []float32, usage string) {

	f.VarP(newFloat32SliceValue(value, p), name, shorthand, usage)

}

// Float32SliceVar defines a float32[] flag with specified name, default value, and usage string.

// The argument p points to a float32[] variable in which to store the value of the flag.

func Float32SliceVar(p *[]float32, name string, value []float32, usage string) {

	CommandLine.VarP(newFloat32SliceValue(value, p), name, "", usage)

}

// Float32SliceVarP is like Float32SliceVar, but accepts a shorthand letter that can be used after a single dash.

func Float32SliceVarP(p *[]float32, name, shorthand string, value []float32, usage string) {

	CommandLine.VarP(newFloat32SliceValue(value, p), name, shorthand, usage)

}

// Float32Slice defines a []float32 flag with specified name, default value, and usage string.

// The return value is the address of a []float32 variable that stores the value of the flag.

func (f *FlagSet) Float32Slice(name string, value []float32, usage string) *[]float32 {

	p := []float32{}

	f.Float32SliceVarP(&p, name, "", value, usage)

	return &p

}

// Float32SliceP is like Float32Slice, but accepts a shorthand letter that can be used after a single dash.

func (f *FlagSet) Float32SliceP(name, shorthand string, value []float32, usage string) *[]float32 {

	p := []float32{}

	f.Float32SliceVarP(&p, name, shorthand, value, usage)

	return &p

}

// Float32Slice defines a []float32 flag with specified name, default value, and usage string.

// The return value is the address of a []float32 variable that stores the value of the flag.

func Float32Slice(name string, value []float32, usage string) *[]float32 {

	return CommandLine.Float32SliceP(name, "", value, usage)

}

// Float32SliceP is like Float32Slice, but accepts a shorthand letter that can be used after a single dash.

func Float32SliceP(name, shorthand string, value []float32, usage string) *[]float32 {

	return CommandLine.Float32SliceP(name, shorthand, value, usage)

}