package sysutils

import (
	"strconv"
	"strings"

	"r00t2.io/sysutils/errs"
)

// NsToInode splits a Linux namespace identifier (e.g. `net:[12345]`) to its type (e.g. `net`) and inode (e.g. `12345`).
func NsToInode(ns string) (typ string, inode uint64, err error) {

	var fields []string

	fields = strings.SplitN(ns, ":", 2)

	if len(fields) != 2 {
		err = errs.ErrInvalidNs
		return
	}

	fields[1] = strings.TrimPrefix(fields[1], "[")
	fields[1] = strings.TrimSuffix(fields[1], "]")

	if inode, err = strconv.ParseUint(fields[1], 10, 64); err != nil {
		return
	}

	typ = fields[0]

	return
}