// Copyright 2022 Gravitational, Inc
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package appaccess

import (
	"encoding/json"
	"net/http"
	"testing"

	"github.com/stretchr/testify/require"

	"github.com/gravitational/teleport/api/types/wrappers"
	"github.com/gravitational/teleport/lib/defaults"
	"github.com/gravitational/teleport/lib/jwt"
	"github.com/gravitational/teleport/lib/web"
)

func verifyJWT(t *testing.T, pack *Pack, token, appURI string) {
	// Get and unmarshal JWKs
	status, body, err := pack.MakeRequest(nil, http.MethodGet, "/.well-known/jwks.json")
	require.NoError(t, err)
	require.Equal(t, http.StatusOK, status)
	var jwks web.JWKSResponse
	err = json.Unmarshal([]byte(body), &jwks)
	require.NoError(t, err)
	require.Len(t, jwks.Keys, 1)
	publicKey, err := jwt.UnmarshalJWK(jwks.Keys[0])
	require.NoError(t, err)

	// Verify JWT.
	key, err := jwt.New(&jwt.Config{
		PublicKey:   publicKey,
		Algorithm:   defaults.ApplicationTokenAlgorithm,
		ClusterName: pack.jwtAppClusterName,
	})
	require.NoError(t, err)
	claims, err := key.Verify(jwt.VerifyParams{
		Username: pack.username,
		RawToken: token,
		URI:      appURI,
	})
	require.NoError(t, err)
	require.Equal(t, pack.username, claims.Username)
	require.Equal(t, pack.user.GetRoles(), claims.Roles)

	filteredTraits := wrappers.Traits{}
	for trait, values := range pack.user.GetTraits() {
		if len(values) > 0 {
			filteredTraits[trait] = values
		}
	}
	require.Equal(t, filteredTraits, claims.Traits)
}