package devicepath

import (
	"errors"
	"fmt"
	"strings"
)

const (
	filePrefix = "File"
)

type FileDevicePath struct {
	path string
}

func (fp *FileDevicePath) Type() DeviceNodeType {
	return MediaDevicePath
}

func (fp *FileDevicePath) SubType() DeviceNodeSubType {
	return FileSubType
}

func (fp *FileDevicePath) Bytes() []byte {
	return nil
}

func (fp *FileDevicePath) String() string {
	return fmt.Sprintf("%s(%s)", filePrefix, fp.path)
}

func (fp *FileDevicePath) ParseString(raw string) error {
	if !checkStringFormat(raw, filePrefix, -1) {
		return ErrMalformedString
	}
	args := strings.Split(raw[len(filePrefix)+1:len(raw)-1], ",")
	if len(args) != 1 {
		return errors.New("unexpected number of arguments")
	}
	fp.path = args[0]
	return nil
}