package webserver

import (
	"context"
	"crypto/x509"
	"encoding/pem"
	"errors"

	"google.golang.org/protobuf/types/known/structpb"
)

type contextKey int

const tokenInfoCtxKey contextKey = iota

func withTokenInfo(ctx context.Context, info *TokenInfo) context.Context {
	return context.WithValue(ctx, tokenInfoCtxKey, info)
}

func tokenInfoFromContext(ctx context.Context) *TokenInfo {
	v, _ := ctx.Value(tokenInfoCtxKey).(*TokenInfo)
	return v
}

// structFromMap converts a map[string]interface{} to a *structpb.Struct.
func structFromMap(m map[string]interface{}) (*structpb.Struct, error) {
	return structpb.NewStruct(m)
}

// parsePEMCert decodes the first PEM block and parses it as an x509 certificate.
func parsePEMCert(pemData []byte) (*x509.Certificate, error) {
	block, _ := pem.Decode(pemData)
	if block == nil {
		return nil, errors.New("no PEM block found")
	}
	return x509.ParseCertificate(block.Bytes)
}