// Copyright (C) 2020 Marius Schellenberger

package pve

import (
	"strings"
)

type IPConfigs []*IPConfig

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

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

type IPConfig struct {
	IPv4CIDR    string
	IPv4Gateway string
	IPv6CIDR    string
	IPv6Gateway string
	MTU         string
}

func (c *IPConfig) String() string {
	var str []string
	if c.IPv4CIDR != "" {
		str = append(str, "ip="+c.IPv4CIDR)
		if c.IPv4Gateway != "" {
			str = append(str, "gw="+c.IPv4Gateway)
		}
	}
	if c.IPv6CIDR != "" {
		str = append(str, "ip6="+c.IPv6CIDR)
		if c.IPv6Gateway != "" {
			str = append(str, "gw6="+c.IPv6Gateway)
		}
	}
	if c.MTU != "" {
		str = append(str, "mtu="+c.MTU)
	}
	return strings.Join(str, ",")
}

func parseIPConfig(s string) (c *IPConfig) {
	cfg := strings.Split(s, ",")
	if len(cfg) == 0 {
		return
	}
	c = new(IPConfig)
	for _, val := range cfg {
		v := strings.Split(val, "=")
		if len(v) != 2 {
			continue
		}
		switch v[0] {
		case "ip":
			c.IPv4CIDR = v[1]
		case "gw":
			c.IPv4Gateway = v[1]
		case "ip6":
			c.IPv6CIDR = v[1]
		case "gw6":
			c.IPv6Gateway = v[1]
		case "mtu":
			c.MTU = v[1]
		}
	}
	return
}