package webapi

import (
	"encoding/json"
	"errors"
	"fmt"
	"log"
	"net"
	"net/url"
)

type UpdateRequest struct {
	IPv4     net.IP
	IPv6     net.IP
	UserName string
	Password string
	IPv6Net  *net.IPNet
}

func (ur *UpdateRequest) String() string {
	return fmt.Sprintf("IPv4: %v, IPv6: %v, UserName: %v, Password: %v, IPv6Net: %v",
		ur.IPv4, ur.IPv6, ur.UserName, ur.Password, ur.IPv6Net)
}

func (ur *UpdateRequest) PrettyPrint() string {
	s, err := json.MarshalIndent(ur, "", " ")
	if err != nil {
		log.Fatalf("Failed to pretty print UpdateRequest via JSON: %v", err)
	}
	return string(s)
}

func createUpdateRequestFromForm(form url.Values) (*UpdateRequest, error) {
	ur := &UpdateRequest{}

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

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

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

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

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

	return ur, nil
}