package fsdef

/*
	fsdef.go

	This package handle error related to file systems.
	See comments below for usage.
*/
import (
	"errors"
	"io"
	"os"
)

type File interface {
	Chdir() error
	Chmod(mode os.FileMode) error
	Chown(uid, gid int) error
	Close() error
	Name() string
	Read(b []byte) (n int, err error)
	ReadAt(b []byte, off int64) (n int, err error)
	ReadDir(n int) ([]os.DirEntry, error)
	ReadFrom(r io.Reader) (n int64, err error)
	Readdir(n int) ([]os.FileInfo, error)
	Seek(offset int64, whence int) (ret int64, err error)
	Stat() (os.FileInfo, error)
	Truncate(size int64) error
	Write(b []byte) (n int, err error)
	WriteString(s string) (n int, err error)
}

var (
	/*
		READ WRITE PERMISSIONS
	*/
	FsReadOnly  = "readonly"
	FsWriteOnly = "writeonly"
	FsReadWrite = "readwrite"
	FsDenied    = "denied"

	/*
		ERROR TYPES
	*/
	//Redirective Error
	ErrRedirectParent      = errors.New("Redirect:parent")
	ErrRedirectCurrentRoot = errors.New("Redirect:root")
	ErrRedirectUserRoot    = errors.New("Redirect:userroot")

	//Resolve errors
	ErrVpathResolveFailed = errors.New("FS_VPATH_RESOLVE_FAILED")
	ErrRpathResolveFailed = errors.New("FS_RPATH_RESOLVE_FAILED")
	ErrFSHNotFOund        = errors.New("FS_FILESYSTEM_HANDLER_NOT_FOUND")

	//Operation errors
	ErrOperationNotSupported = errors.New("FS_OPR_NOT_SUPPORTED")
	ErrNullOperation         = errors.New("FS_NULL_OPR")
)

//Generate a File Manager redirection error message
func NewRedirectionError(targetVpath string) error {
	return errors.New("Redirect:" + targetVpath)
}

//Check if a file system is network drive
func IsNetworkDrive(fstype string) bool {
	if fstype == "webdav" || fstype == "ftp" {
		return true
	}

	return false
}