package main

import (
	"encoding/json"
	"net"

	"github.com/satori/go.uuid"
)

// ACMETxt is the default structure for the user controlled record
type ACMETxt struct {
	Username uuid.UUID
	Password string
	ACMETxtPost
	LastActive int64
	AllowFrom  cidrslice
}

// ACMETxtPost holds the DNS part of the ACMETxt struct
type ACMETxtPost struct {
	Subdomain string `json:"subdomain"`
	Value     string `json:"txt"`
}

// cidrslice is a list of allowed cidr ranges
type cidrslice []string

func (c *cidrslice) JSON() string {
	ret, _ := json.Marshal(c.ValidEntries())
	return string(ret)
}

func (c *cidrslice) ValidEntries() []string {
	valid := []string{}
	for _, v := range *c {
		_, _, err := net.ParseCIDR(v)
		if err == nil {
			valid = append(valid, v)
		}
	}
	return valid
}

func newACMETxt() ACMETxt {
	var a = ACMETxt{}
	password := generatePassword(40)
	a.Username = uuid.NewV4()
	a.Password = password
	a.Subdomain = uuid.NewV4().String()
	return a
}