package zfs

import (
	"os"

	"bazil.org/fuse"
	"bazil.org/fuse/fs"

	"golang.org/x/sys/unix"
)

func Mount(mountpoint string) error {
	options := []fuse.MountOption{
		fuse.AllowOther(),
		fuse.AllowNonEmptyMount(),
		fuse.MaxReadahead(uint32(128 << 10)),
		fuse.DefaultPermissions(),
		fuse.FSName("zurgfs"),
	}
	c, err := fuse.Mount(mountpoint, options...)
	if err != nil {
		return err
	}
	defer c.Close()

	srv := fs.New(c, nil)

	filesys := &FS{
		uid:   uint32(unix.Geteuid()),
		gid:   uint32(unix.Getegid()),
		umask: os.FileMode(0),
	}

	// Serve our tree via FUSE.
	if err := srv.Serve(filesys); err != nil {
		return err
	}

	return nil
}

func Unmount(mountpoint string) error {
	fuse.Unmount(mountpoint)
	return nil
}