package server

import (
	"context"
	"crypto"
	"crypto/ed25519"
	"fmt"

	"github.com/common-fate/httpsig/alg_ed25519"
	"github.com/common-fate/httpsig/verifier"
)

type KeyEntry struct {
	alg       string
	publicKey crypto.PublicKey
	userId    string
}

type InMemoryDirectory struct {
	records map[string]KeyEntry
}

func (dir *InMemoryDirectory) GetKey(ctx context.Context, keyId string, _ string) (verifier.Algorithm, error) {
	entry := dir.records[keyId]

	var alg verifier.Algorithm
	var err error

	switch entry.alg {
	case "ed25519":
		alg = alg_ed25519.Ed25519{
			PublicKey: entry.publicKey.(ed25519.PublicKey),
			Attrs:     entry.userId,
		}
	default:
		err = fmt.Errorf("unknown algoritm: %s", entry.alg)
	}

	return alg, err
}