package vfs

import (
	"context"
	"io/fs"
	"path"
)

var _ File = &dirFile{}

func newDirFile(name string) File {
	return &dirFile{
		name: path.Base(name),
	}
}

type dirFile struct {
	name string
}

// Close implements File.
func (d *dirFile) Close(ctx context.Context) error {
	return nil
}

// Info implements File.
func (d *dirFile) Info() (fs.FileInfo, error) {
	return newDirInfo(d.name), nil
}

// IsDir implements File.
func (d *dirFile) IsDir() bool {
	return true
}

// Name implements File.
func (d *dirFile) Name() string {
	return d.name
}

// Read implements File.
func (d *dirFile) Read(ctx context.Context, p []byte) (n int, err error) {
	return 0, fs.ErrInvalid
}

// ReadAt implements File.
func (d *dirFile) ReadAt(ctx context.Context, p []byte, off int64) (n int, err error) {
	return 0, fs.ErrInvalid
}

// Size implements File.
func (d *dirFile) Size() int64 {
	return 0
}

// Type implements File.
func (d *dirFile) Type() fs.FileMode {
	return roMode | fs.ModeDir
}