package moudle

import (
	"SafelineAPI/internal/app/logger"
	"SafelineAPI/internal/class/MyUser"
	"crypto/ecdsa"
	"crypto/elliptic"
	"crypto/rand"

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

func ApplyCert(domains []string, email string, provider challenge.Provider) ([]byte, []byte, bool) {
	privateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
	if err != nil {
		logger.Error.Printf("申请 %s%s%s 证书时发生错误: %s%s%s", logger.Cyan, domains, logger.Reset, logger.Red, err, logger.Reset)
		return nil, nil, true
	}

	myUser := MyUser.MyUser{
		Email: email,
		Key:   privateKey,
	}

	config := lego.NewConfig(&myUser)
	config.Certificate.KeyType = certcrypto.RSA2048
	client, err := lego.NewClient(config)
	if err != nil {
		logger.Error.Printf("申请 %s%s%s 证书时发生错误: %s%s%s", logger.Cyan, domains, logger.Reset, logger.Red, err, logger.Reset)
		return nil, nil, true
	}
	err = client.Challenge.SetDNS01Provider(provider)
	if err != nil {
		logger.Error.Printf("申请 %s%s%s 证书时发生错误: %s%s%s", logger.Cyan, domains, logger.Reset, logger.Red, err, logger.Reset)
		return nil, nil, true
	}

	reg, err := client.Registration.Register(registration.RegisterOptions{TermsOfServiceAgreed: true})
	if err != nil {
		logger.Error.Printf("申请 %s%s%s 证书时发生错误: %s%s%s", logger.Cyan, domains, logger.Reset, logger.Red, err, logger.Reset)
		return nil, nil, true
	}

	myUser.Registration = reg
	request := certificate.ObtainRequest{
		Domains: domains,
		Bundle:  true,
	}

	certResource, err := client.Certificate.Obtain(request)
	if err != nil {
		logger.Error.Printf("申请 %s%s%s 证书时发生错误: %s%s%s", logger.Cyan, domains, logger.Reset, logger.Red, err, logger.Reset)
		return nil, nil, true
	}

	return certResource.Certificate, certResource.PrivateKey, false
}