package fs

import (
	"io"
	"os"

	"github.com/restic/restic/internal/restic"
)

// FS bundles all methods needed for a file system.
type FS interface {
	OpenFile(name string, flag int) (File, error)
	Lstat(name string) (os.FileInfo, error)
	DeviceID(fi os.FileInfo) (deviceID uint64, err error)
	ExtendedStat(fi os.FileInfo) ExtendedFileInfo
	NodeFromFileInfo(path string, fi os.FileInfo, ignoreXattrListError bool) (*restic.Node, error)

	Join(elem ...string) string
	Separator() string
	Abs(path string) (string, error)
	Clean(path string) string
	VolumeName(path string) string
	IsAbs(path string) bool

	Dir(path string) string
	Base(path string) string
}

// File is an open file on a file system.
type File interface {
	io.Reader
	io.Closer

	Readdirnames(n int) ([]string, error)
	Stat() (os.FileInfo, error)
}