package opt

import "strconv"

type FloatOption struct {
	name        string
	shortName   string
	description string
	value       float64
}

var _ Option = (*FloatOption)(nil)

func Float(name, shortName string, defaultValue float64, description string) *FloatOption {
	return &FloatOption{
		name:        name,
		shortName:   shortName,
		description: description,
		value:       defaultValue,
	}
}

// Description implements Option.
func (o *FloatOption) Description() string {
	return o.description
}

// Name implements Option.
func (o *FloatOption) Name() string {
	return o.name
}

// ShortName implements Option.
func (o *FloatOption) ShortName() string {
	return o.shortName

}

// Value implements Option.
func (o *FloatOption) Parse(raw string) error {
	if raw == "" {
		return nil
	}

	floatVal, err := strconv.ParseFloat(raw, 64)
	if err != nil {
		return err
	}

	o.value = floatVal
	return nil
}

// RequiresVal implements Option.
func (*FloatOption) RequiresVal() bool {
	return true
}

func (o *FloatOption) Value() float64 {
	return o.value
}