package util

import (
	"fmt"
	"github.com/stackanetes/kubernetes-entrypoint/util/env"
	"net"
	"os"
	"strings"
)

func GetIp() (ip string, err error) {
	var iface string
	if iface = os.Getenv("INTERFACE_NAME"); iface == "" {
		return "", fmt.Errorf("Environment variable INTERFACE_NAME not set")
	}
	i, err := net.InterfaceByName(iface)
	if err != nil {
		return "", fmt.Errorf("Cannot get iface: %v", err)
	}

	address, err := i.Addrs()
	if err != nil || len(address) == 0 {
		return "", fmt.Errorf("Cannot get ip: %v", err)
	}
	//Take first element to get rid of subnet
	ip = strings.Split(address[0].String(), "/")[0]
	return
}

func ContainsSeparator(envString string, kind string) bool {
	if strings.Contains(envString, env.Separator) {
		fmt.Errorf("%s doesn't accept namespace: %s", kind, envString)
		return true
	}
	return false
}