package service

import (
	"errors"
	"fmt"
	"net"
	"net/url"
)

type ClientInfo struct {
	IPv4      net.IP
	IPv6      net.IP
	UserName  string
	Password  string
	Domain    string
	DualStack bool
	IPv6Net   *net.IPNet
}

func (ci *ClientInfo) String() string {
	return fmt.Sprintf("IPv4: %v, IPv6: %v, UserName: %v, Password: %v, Domain: %v, DualStack: %v, IPv6Net: %v",
		ci.IPv4, ci.IPv6, ci.UserName, ci.Password, ci.Domain, ci.DualStack, ci.IPv6Net)
}

func CreateClientInfoFromForm(form url.Values) (*ClientInfo, error) {
	ci := &ClientInfo{}

	if form.Get("IPv4") != "" {
		if ci.IPv4 = net.ParseIP(form.Get("IPv4")); ci.IPv4 == nil {
			return nil, errors.New("could not parse IPv4 address")
		}
	}

	if form.Get("IPv6") != "" {
		if ci.IPv6 = net.ParseIP(form.Get("IPv6")); ci.IPv6 == nil {
			return nil, errors.New("could not parse IPv6 address")
		}
	}

	ci.UserName = form.Get("UserName")
	if ci.UserName == "" {
		return nil, errors.New("a UserName must be specified")
	}

	ci.Password = form.Get("Password")
	if ci.Password == "" {
		return nil, errors.New("a Password must be specified")
	}

	ci.Domain = form.Get("Domain")
	if ci.Domain == "" {
		return nil, errors.New("a Domain must be specified")
	}

	if form.Get("DualStack") == "1" {
		ci.DualStack = true
	} else {
		ci.DualStack = false
	}

	if ip6net := form.Get("IPv6Net"); ip6net != "" {
		_, ipnet, err := net.ParseCIDR(ip6net)
		if err != nil {
			return nil, errors.New("could not parse IPv6Net")
		}
		ci.IPv6Net = ipnet
	}

	return ci, nil
}