// Copyright (C) 2020 Marius Schellenberger

package pve

import (
	"fmt"
	"strings"
)

type NetworkDevices []*NetworkDevice

func (c *NetworkDevices) Set(index int, d *NetworkDevice) {
	l := len(*c)
	if index >= l {
		n := make(NetworkDevices, index+1)
		copy(n, *c)
		n[index] = d
		*c = n
		return
	}
	if l == 0 {
		*c = append(*c, d)
		return
	}
	(*c)[index] = d
}

func (c *NetworkDevices) Get(index int) *NetworkDevice {
	if len(*c)-1 >= index {
		return (*c)[index]
	}
	return nil
}

type NetworkDevice struct {
	Type       string
	MACAddress string
	Bridge     string
	MTU        string
}

func (n *NetworkDevice) String() string {
	var mtu string
	if n.MTU != "" {
		mtu = "," + n.MTU
	}
	return fmt.Sprintf("%s=%s,bridge=%s%s", n.Type, n.MACAddress, n.Bridge, mtu)
}
func parseNetworkDevice(s string) (n *NetworkDevice) {
	cfg := strings.Split(s, ",")
	if len(cfg) < 2 {
		return
	}
	n = new(NetworkDevice)
	for _, dev := range []string{"virtio", "e1000", "rtl8139", "vmxnet3"} {
		if strings.HasPrefix(cfg[0], dev) {
			n.Type = dev
			n.MACAddress = cfg[0][len(dev)+1:]
			break
		}
	}
	for _, o := range cfg {
		if strings.HasPrefix(o, "bridge=") {
			n.Bridge = o[7:]
		} else if strings.HasPrefix(o, "mtu=") {
			n.MTU = o[4:]
		}
	}
	return
}