package fusefs

import (
	"syscall"

	"go.arsenm.dev/infinitime/blefs"
)

func syscallErr(err error) syscall.Errno {
	if err == nil {
		return 0
	}

	switch err {
	case blefs.FSError{0x02}: // filesystem error
		return syscall.EIO // TODO
	case blefs.FSError{0x05}: // read-only filesystem
		return syscall.EROFS
	case blefs.FSError{0x03}: // no such file
		return syscall.ENOENT
	case blefs.FSError{0x04}: // protocol error
		return syscall.EPROTO
	case blefs.FSError{-5}: // input/output error
		return syscall.EIO
	case blefs.FSError{-84}: // filesystem is corrupted
		return syscall.ENOTRECOVERABLE // TODO
	case blefs.FSError{-2}: // no such directory entry
		return syscall.ENOENT
	case blefs.FSError{-17}: // entry already exists
		return syscall.EEXIST
	case blefs.FSError{-20}: // entry is not a directory
		return syscall.ENOTDIR
	case blefs.FSError{-39}: // directory is not empty
		return syscall.ENOTEMPTY
	case blefs.FSError{-9}: // bad file number
		return syscall.EBADF
	case blefs.FSError{-27}: // file is too large
		return syscall.EFBIG
	case blefs.FSError{-22}: // invalid parameter
		return syscall.EINVAL
	case blefs.FSError{-28}: // no space left on device
		return syscall.ENOSPC
	case blefs.FSError{-12}: // no more memory available
		return syscall.ENOMEM
	case blefs.FSError{-61}: // no attr available
		return syscall.ENODATA // TODO
	case blefs.FSError{-36}: // file name is too long
		return syscall.ENAMETOOLONG
	case blefs.ErrFileNotExists: // file does not exist
		return syscall.ENOENT
	case blefs.ErrFileReadOnly: // file is read only
		return syscall.EACCES
	case blefs.ErrFileWriteOnly: // file is write only
		return syscall.EACCES
	case blefs.ErrInvalidOffset: // invalid file offset
		return syscall.EFAULT // TODO
	case blefs.ErrOffsetChanged: // offset has already been changed
		return syscall.ESPIPE
	case blefs.ErrReadOpen: // only one file can be opened for reading at a time
		return syscall.ENFILE
	case blefs.ErrWriteOpen: // only one file can be opened for writing at a time
		return syscall.ENFILE
	case blefs.ErrNoRemoveRoot: // refusing to remove root directory
		return syscall.EPERM
	}

	return syscall.EIO // TODO
}