package ssl

import (
	"github.com/go-acme/lego/v4/providers/dns"
	"os"
	"pmail/utils/errors"
	"regexp"
	"strings"
)

func GetServerParamsList(serverName string) ([]string, error) {
	var serverParams []string

	infos, err := os.ReadDir("./")
	if err != nil {
		return nil, errors.Wrap(err)
	}

	upperServerName := strings.ToUpper(serverName)

	for _, info := range infos {
		if strings.HasPrefix(info.Name(), upperServerName) {
			serverParams = append(serverParams, info.Name())
		}
	}
	if len(serverParams) != 0 {
		return serverParams, nil
	}

	_, err = dns.NewDNSChallengeProviderByName(serverName)
	if err == nil {
		return nil, errors.New(serverName + " Not Support")
	}
	if strings.Contains(err.Error(), "unrecognized DNS provider") {
		return nil, err
	}

	re := regexp.MustCompile(`missing: (.+)`)
	// namesilo: some credentials information are missing: NAMESILO_API_KEY
	estr := err.Error()
	name := re.FindStringSubmatch(estr)

	if len(name) == 2 {
		names := strings.Split(name[1], ",")

		for _, s := range names {
			serverParams = append(serverParams, s)
			SetDomainServerParams(s, "empty")
		}

	}
	_, err = dns.NewDNSChallengeProviderByName(serverName)

	return serverParams, err
}

func SetDomainServerParams(name, value string) {
	key := name
	err := os.WriteFile(key, []byte(value), 0644)
	if err != nil {
		panic(err)
	}
	err = os.Setenv(name+"_FILE", key)
	if err != nil {
		panic(err)
	}
}