package utils

import (
	"encoding/json"
	"fmt"

	"github.com/golang-jwt/jwt/v5"
)

type WbAuthData struct {
	Token string `json:"token"`
}

func NewWbAuthData(token string) WbAuthData {
	return WbAuthData{
		Token: token,
	}
}

func DecodeWildberriesJwt(token []byte) (WbAuthData, jwt.MapClaims, error) {
	var authData WbAuthData
	err := json.Unmarshal(token, &authData)
	if err != nil {
		return authData, nil, fmt.Errorf("failed to unmarshal JWT: %w", err)
	}
	claims := jwt.MapClaims{}
	_, _, err = jwt.NewParser().ParseUnverified(authData.Token, claims)
	if err != nil {
		return authData, nil, fmt.Errorf("invalid JWT: %w", err)
	}

	return authData, claims, nil
}

func ToPtrs[T any](s []T) []*T {
	res := make([]*T, len(s))
	for i := range s {
		res[i] = &s[i]
	}
	return res
}

func DerefSlice[T any](s []*T) []T {
	res := make([]T, len(s))
	for i := range s {
		if s[i] != nil {
			res[i] = *s[i]
		}
	}
	return res
}