package multinet

import "net"

// Interface provides information about net.Interface.
type Interface interface {
	Name() string
	Addrs() ([]net.Addr, error)
	Down() bool
}

type netInterface struct {
	iface net.Interface
}

func (i *netInterface) Name() string {
	return i.iface.Name
}

func (i *netInterface) Addrs() ([]net.Addr, error) {
	return i.iface.Addrs()
}

func (i *netInterface) Down() bool {
	return i.iface.Flags&net.FlagUp == 0
}

func systemInterfaces() ([]Interface, error) {
	ifaces, err := net.Interfaces()
	if err != nil {
		return nil, err
	}
	var result []Interface
	for _, iface := range ifaces {
		result = append(result, &netInterface{iface: iface})
	}
	return result, nil
}