package auth

import (
	"bytes"
	"net"

	"git.loafle.net/commons_go/util/net/gateway"
)

type Network struct {
	Name       string `json:"name"`
	Address    string `json:"address"`
	Gateway    string `json:"gateway"`
	MacAddress string `json:"macAddress"`
}

func getNetwork() (*Network, error) {
	var ip net.IP
	var iface string
	var err error
	if ip, iface, err = gateway.DiscoverGateway(); nil != err {
		return nil, err
	}

	interfaces, err := net.Interfaces()
	if err != nil {
		return nil, err
	}

	idx := -1

	for _idx, i := range interfaces {
		if i.Name == iface {
			idx = _idx
			break
		}
	}

	if -1 == idx {
		return nil, nil
	}

	n := &Network{}
	i := interfaces[idx]

	n.Name = i.Name
	n.MacAddress = i.HardwareAddr.String()
	n.Gateway = ip.String()

	if addrs, err := i.Addrs(); nil == err {
		var buffer bytes.Buffer
		for _idx, a := range addrs {
			if 0 < _idx {
				buffer.WriteString("|")
			}
			buffer.WriteString(a.String())
		}
		n.Address = buffer.String()
	} else {
		return nil, err
	}

	return n, nil
}