package main

import (
	"crypto"
	"crypto/ecdsa"
	"crypto/elliptic"
	"crypto/rand"
	"fmt"
	"log"
	"os"

	"github.com/go-acme/lego/v4/providers/dns/cloudflare"

	"github.com/go-acme/lego/v4/certcrypto"
	"github.com/go-acme/lego/v4/certificate"
	"github.com/go-acme/lego/v4/lego"
	"github.com/go-acme/lego/v4/registration"
)

type User struct {
	Email        string
	Registration *registration.Resource
	key          crypto.PrivateKey
}

func (u *User) GetEmail() string {
	return u.Email
}
func (u *User) GetRegistration() *registration.Resource {
	return u.Registration
}
func (u *User) GetPrivateKey() crypto.PrivateKey {
	return u.key
}

func mainexample() {

	// Create a user. New accounts need an email and private key to start.
	privateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
	if err != nil {
		log.Fatal(err)
	}

	user := User{
		Email: config.GetAsString("Certificates.email"),
		key:   privateKey,
	}

	configLE := lego.NewConfig(&user)

	// This CA URL is configured for a local dev instance of Boulder running in Docker in a VM.
	configLE.CADirURL = "http://192.168.99.100:4000/directory"
	configLE.Certificate.KeyType = certcrypto.RSA2048

	// A client facilitates communication with the CA server.
	client, err := lego.NewClient(configLE)
	if err != nil {
		log.Fatal(err)
	}

	dnsConfig := cloudflare.NewDefaultConfig()
	dnsConfig.AuthEmail = "" //TODO Pull from config
	dnsConfig.AuthKey = ""   //TODO Pull from config

	provider, err := cloudflare.NewDNSProviderConfig(dnsConfig)
	if err != nil {
		fmt.Printf("Error creating DNS provider: %v\n", err)
		os.Exit(1)
	}
	err = client.Challenge.SetDNS01Provider(provider)
	if err != nil {
		fmt.Printf("Error setting dns provider: %v\n", err)
		os.Exit(1)
	}

	// New users will need to register
	reg, err := client.Registration.Register(registration.RegisterOptions{TermsOfServiceAgreed: true})
	if err != nil {
		log.Fatal(err)
	}
	user.Registration = reg

	request := certificate.ObtainRequest{
		Domains: []string{"mydomain.com"},
		Bundle:  true,
	}
	certificates, err := client.Certificate.Obtain(request)
	if err != nil {
		log.Fatal(err)
	}

	// Each certificate comes back with the cert bytes, the bytes of the client's
	// private key, and a certificate URL. SAVE THESE TO DISK.
	fmt.Printf("%#v\n", certificates)

	// ... all done.
}