package gitalyauth

import (
	"testing"
	"time"

	"github.com/grpc-ecosystem/go-grpc-middleware/v2/metadata"
	"github.com/stretchr/testify/require"
	"gitlab.com/gitlab-org/gitaly/v16/internal/testhelper"
)

func TestCheckTokenV2(t *testing.T) {
	// the tests below had their hmac signatures generated with the default 30s
	// in our tests, we modify this number with ldflags but this test should continue
	// to use the 30s number

	defer func(d time.Duration) {
		tokenValidityDuration = d
	}(tokenValidityDuration)

	tokenValidityDuration = 30 * time.Second

	targetTime := time.Unix(1535671600, 0)
	secret := []byte("foo")

	testCases := []struct {
		desc   string
		token  string
		result error
	}{
		{
			desc:   "Valid v2 secret, future time within threshold",
			token:  "v2.3346cb25ecdb928defd368e7390522a86764bbdf1e8b21aaef27c4c23ec9c899.1535671615",
			result: nil,
		},
		{
			desc:   "Valid v2 secret, past time within threshold",
			token:  "v2.b77158328e80be2984eaf08788419d25f3484eae484aec1297af6bdf1a456610.1535671585",
			result: nil,
		},
		{
			desc:   "Invalid secret, time within threshold",
			token:  "v2.52a3b9016f46853c225c72b87617ac27109bba8a3068002069ab90e28253a911.1535671585",
			result: errDenied,
		},
		{
			desc:   "Valid secret, time too much in the future",
			token:  "v2.ab9e7315aeecf6815fc0df585370157814131acab376f41797ad4ebc4d9a823c.1535671631",
			result: errDenied,
		},
		{
			desc:   "Valid secret, time too much in the past",
			token:  "v2.f805bc69ca3aedd99e814b3fb1fc1e6a1094191691480b168a20fad7c2d24557.1535671569",
			result: errDenied,
		},
		{
			desc:   "Mismatching signed and clear message",
			token:  "v2.319b96a3194c1cb2a2e6f1386161aca1c4cda13257fa9df8a328ab6769649bb0.1535671599",
			result: errDenied,
		},
		{
			desc:   "Invalid version",
			token:  "v3.6fec98e8fe494284ce545c4b421799f02b9718b0eadfc3772d027e1ac5d6d569.1535671601",
			result: errDenied,
		},
		{
			desc:   "Invalid token format",
			token:  "foo.bar",
			result: errUnauthenticated,
		},
		{
			desc:   "Empty token",
			token:  "",
			result: errUnauthenticated,
		},
	}

	for _, tc := range testCases {
		t.Run(tc.desc, func(t *testing.T) {
			ctx := testhelper.Context(t)

			md := metadata.MD{}
			md.Set("authorization", "Bearer "+tc.token)
			result := CheckToken(md.ToIncoming(ctx), string(secret), targetTime)

			require.Equal(t, tc.result, result)
		})
	}
}
