package jwks

import (
	"errors"
	"github.com/MicahParks/keyfunc/v3"
	"github.com/golang-jwt/jwt/v5"
	"go.uber.org/zap"
	"leafdev.top/leaf/rag/internal/providers"
	"time"
)

var refreshRate = 1 * time.Hour

var Jwks keyfunc.Keyfunc

var (
	ErrJWKSNotInitialized = errors.New("JWKS is not initialized")
)

var logger = providers.MustGet[zap.Logger]()
var config = providers.MustGet[providers.GlobalConfig]()

func RefreshJWKS() {
	logger.Info("Refreshing JWKS...")

	var err error

	Jwks, err = keyfunc.NewDefault([]string{config.JWKS.Url})
	if err != nil {
		logger.Error("Failed to create JWK Set from resource at the given URL.\nError: " + err.Error())
	}

	logger.Info("JWKS refreshed.")
}

func ParseJWT(jwtB64 string) (*jwt.Token, error) {
	if Jwks.Keyfunc == nil {
		return nil, ErrJWKSNotInitialized
	}

	token, err := jwt.Parse(jwtB64, Jwks.Keyfunc)

	return token, err
}