glchat/internal/gateway/gateway_test.go

package gateway_test

import (
	"context"
	"encoding/json"
	"log/slog"
	"net/http/httptest"
	"path/filepath"
	"strings"
	"testing"
	"time"

	"github.com/coder/websocket"

	"glchat/internal/auth"
	"glchat/internal/bootstrap"
	"glchat/internal/config"
	"glchat/internal/database"
	"glchat/internal/gateway"
	"glchat/internal/permissions"
	"glchat/internal/store"
)

type fixture struct {
	service *gateway.Service
	store   *store.Store
	auth    *auth.Service
	server  *httptest.Server
}

func newFixture(t *testing.T) *fixture {
	t.Helper()
	ctx := context.Background()
	db, err := database.Open(ctx, database.Options{
		Path: filepath.Join(t.TempDir(), "glchat.db"), ReadPool: 2, Migrate: true,
	})
	if err != nil {
		t.Fatalf("open database: %v", err)
	}
	t.Cleanup(func() { _ = db.Close() })

	st := store.New(db)
	logger := slog.New(slog.DiscardHandler)
	cfg := config.Config{
		Domain:            "gl.test",
		SessionPepper:     "gateway-pepper",
		MasterKey:         "00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff",
		Argon2MemoryKiB:   1024,
		Argon2Iterations:  1,
		Argon2Parallelism: 1,
	}
	authService, err := auth.New(ctx, cfg, st, logger)
	if err != nil {
		t.Fatalf("auth.New: %v", err)
	}
	// Главный сервер с ролями и общей комнатой создаёт bootstrap.
	if _, err := bootstrap.New(st, authService, logger).Run(ctx, bootstrap.Options{
		Email: "owner@example.com", Password: "correct-horse-battery",
	}); err != nil {
		t.Fatalf("bootstrap: %v", err)
	}

	service := gateway.New(st, authService, gateway.NewSnapshot(st, nil), logger, []string{"https://gl.test"})
	server := httptest.NewServer(service.Handler())
	t.Cleanup(server.Close)

	return &fixture{service: service, store: st, auth: authService, server: server}
}

// dial подключается к Gateway и читает HELLO.
func (f *fixture) dial(t *testing.T) (*websocket.Conn, gateway.Envelope) {
	t.Helper()
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	url := "ws" + strings.TrimPrefix(f.server.URL, "http")
	conn, _, err := websocket.Dial(ctx, url, &websocket.DialOptions{
		HTTPHeader: map[string][]string{"Origin": {"https://gl.test"}},
	})
	if err != nil {
		t.Fatalf("dial gateway: %v", err)
	}
	t.Cleanup(func() { _ = conn.CloseNow() })

	envelope := readEnvelope(t, conn)
	if envelope.Op != gateway.OpHello {
		t.Fatalf("first frame op = %d, want HELLO (%d)", envelope.Op, gateway.OpHello)
	}
	return conn, envelope
}

func readEnvelope(t *testing.T, conn *websocket.Conn) gateway.Envelope {
	t.Helper()
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	_, data, err := conn.Read(ctx)
	if err != nil {
		t.Fatalf("read frame: %v", err)
	}
	var envelope gateway.Envelope
	if err := json.Unmarshal(data, &envelope); err != nil {
		t.Fatalf("decode frame: %v (raw: %s)", err, data)
	}
	return envelope
}

func send(t *testing.T, conn *websocket.Conn, op int, payload any) {
	t.Helper()
	body, err := json.Marshal(map[string]any{"op": op, "d": payload})
	if err != nil {
		t.Fatalf("marshal frame: %v", err)
	}
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	if err := conn.Write(ctx, websocket.MessageText, body); err != nil {
		t.Fatalf("write frame: %v", err)
	}
}

// joinMainGuildForTest добавляет пользователя в главный сервер: в продакшене
// это делает принятие приглашения.
func joinMainGuildForTest(t *testing.T, f *fixture, token string) {
	t.Helper()
	ctx := context.Background()
	user, _, err := f.auth.ResolveSession(ctx, token)
	if err != nil {
		t.Fatalf("ResolveSession: %v", err)
	}
	guild, err := f.store.GetMainGuild(ctx)
	if err != nil {
		t.Fatalf("GetMainGuild: %v", err)
	}
	defaultRole, err := f.store.DefaultRole(ctx, guild.ID)
	if err != nil {
		t.Fatalf("DefaultRole: %v", err)
	}
	if _, err := f.store.AddGuildMember(ctx, guild.ID, user.ID, ""); err != nil {
		t.Fatalf("AddGuildMember: %v", err)
	}
	if err := f.store.AssignRole(ctx, guild.ID, user.ID, defaultRole.ID); err != nil {
		t.Fatalf("AssignRole: %v", err)
	}
}

func registerUser(t *testing.T, f *fixture, username, email string) string {
	t.Helper()
	_, token, _, err := f.auth.Register(context.Background(), auth.RegisterInput{
		Username: username, Email: email, Password: "correct-horse-battery",
	})
	if err != nil {
		t.Fatalf("register %s: %v", username, err)
	}
	return token
}

func TestHelloAndReady(t *testing.T) {
	f := newFixture(t)
	token := registerUser(t, f, "gateway_user", "gateway@example.com")
	// Автовступления больше нет: в сервер вступаем явно, как по приглашению.
	joinMainGuildForTest(t, f, token)

	conn, hello := f.dial(t)
	var helloPayload struct {
		HeartbeatMS int    `json:"heartbeat_interval_ms"`
		SessionID   string `json:"session_id"`
	}
	if err := json.Unmarshal(hello.D, &helloPayload); err != nil {
		t.Fatalf("decode HELLO: %v", err)
	}
	if helloPayload.HeartbeatMS != int(gateway.HeartbeatInterval.Milliseconds()) {
		t.Fatalf("heartbeat interval = %d", helloPayload.HeartbeatMS)
	}
	if helloPayload.SessionID == "" {
		t.Fatal("HELLO must carry a session id")
	}

	send(t, conn, gateway.OpIdentify, map[string]any{"token": token})
	ready := readEnvelope(t, conn)
	if ready.Op != gateway.OpDispatch || ready.T != "READY" {
		t.Fatalf("frame = op:%d t:%q, want DISPATCH/READY", ready.Op, ready.T)
	}
	if ready.S <= 0 {
		t.Fatalf("READY sequence = %d, want > 0", ready.S)
	}

	var snapshot gateway.Ready
	if err := json.Unmarshal(ready.D, &snapshot); err != nil {
		t.Fatalf("decode READY: %v", err)
	}
	if snapshot.User.Username != "gateway_user" {
		t.Fatalf("READY user = %q", snapshot.User.Username)
	}
	if len(snapshot.Guilds) != 1 {
		t.Fatalf("user must see the guild they joined, got %d", len(snapshot.Guilds))
	}
	guild := snapshot.Guilds[0]
	if len(guild.Roles) != 2 {
		t.Fatalf("main guild roles = %d, want 2", len(guild.Roles))
	}
	if len(guild.Channels) != 1 || guild.Channels[0].Name != "общий" {
		t.Fatalf("unexpected channels: %+v", guild.Channels)
	}
	if !guild.Channels[0].CanSend {
		t.Fatal("default role must allow sending messages")
	}
	if len(guild.MemberIDs) == 0 {
		t.Fatal("READY must include guild members")
	}
	if len(guild.MyRoles) != 1 {
		t.Fatalf("new user must have the default role, got %v", guild.MyRoles)
	}
	if snapshot.HeartbeatMS != int(gateway.HeartbeatInterval.Milliseconds()) {
		t.Fatalf("READY heartbeat interval = %d", snapshot.HeartbeatMS)
	}
}

func TestReadyHidesPrivateChannels(t *testing.T) {
	f := newFixture(t)
	ctx := context.Background()
	// Приватная комната: @user не видит.
	mainGuild, err := f.store.GetMainGuild(ctx)
	if err != nil {
		t.Fatalf("GetMainGuild: %v", err)
	}
	defaultRole, err := f.store.DefaultRole(ctx, mainGuild.ID)
	if err != nil {
		t.Fatalf("DefaultRole: %v", err)
	}
	private, err := f.store.CreateChannel(ctx, store.CreateChannelParams{
		GuildID: &mainGuild.ID, Type: store.ChannelText, Name: "приватный",
	})
	if err != nil {
		t.Fatalf("CreateChannel: %v", err)
	}
	if err := f.store.SetChannelOverride(ctx, store.ChannelOverride{
		ChannelID: private.ID, TargetType: "role", TargetID: defaultRole.ID,
		Deny: uint64(permissions.ViewChannel),
	}); err != nil {
		t.Fatalf("SetChannelOverride: %v", err)
	}

	token := registerUser(t, f, "private_user", "private@example.com")
	joinMainGuildForTest(t, f, token)
	conn, _ := f.dial(t)
	send(t, conn, gateway.OpIdentify, map[string]any{"token": token})
	ready := readEnvelope(t, conn)

	var snapshot gateway.Ready
	if err := json.Unmarshal(ready.D, &snapshot); err != nil {
		t.Fatalf("decode READY: %v", err)
	}
	for _, channel := range snapshot.Guilds[0].Channels {
		if channel.Name == "приватный" {
			t.Fatal("private channel must not appear in READY")
		}
	}
}

func TestIdentifyWithInvalidToken(t *testing.T) {
	f := newFixture(t)
	conn, _ := f.dial(t)

	send(t, conn, gateway.OpIdentify, map[string]any{"token": "not-a-real-token"})
	response := readEnvelope(t, conn)
	if response.Op != gateway.OpInvalidSess {
		t.Fatalf("op = %d, want INVALID_SESSION (%d)", response.Op, gateway.OpInvalidSess)
	}
}

// TestIdentifyWithSessionCookie проверяет браузерный вход: токен в IDENTIFY
// не передаётся, сессия берётся из cookie рукопожатия (AGENT.md 8.1).
func TestIdentifyWithSessionCookie(t *testing.T) {
	f := newFixture(t)
	_, token, session, err := f.auth.Register(context.Background(), auth.RegisterInput{
		Username: "cookie_user", Email: "cookie@example.com", Password: "correct-horse-battery",
	})
	if err != nil {
		t.Fatalf("register: %v", err)
	}
	if session == nil {
		t.Fatal("register returned no session")
	}

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	url := "ws" + strings.TrimPrefix(f.server.URL, "http")
	conn, _, err := websocket.Dial(ctx, url, &websocket.DialOptions{
		HTTPHeader: map[string][]string{
			"Origin": {"https://gl.test"},
			"Cookie": {gateway.SessionCookieName + "=" + token},
		},
	})
	if err != nil {
		t.Fatalf("dial with cookie: %v", err)
	}
	t.Cleanup(func() { _ = conn.CloseNow() })

	if hello := readEnvelope(t, conn); hello.Op != gateway.OpHello {
		t.Fatalf("first frame op = %d, want HELLO", hello.Op)
	}
	// IDENTIFY без токена: сервер доверяет cookie.
	send(t, conn, gateway.OpIdentify, map[string]any{})
	ready := readEnvelope(t, conn)
	if ready.T != "READY" {
		t.Fatalf("frame = %q, want READY", ready.T)
	}
	var snapshot gateway.Ready
	if err := json.Unmarshal(ready.D, &snapshot); err != nil {
		t.Fatalf("decode READY: %v", err)
	}
	if snapshot.User.Username != "cookie_user" {
		t.Fatalf("READY user = %q, want cookie_user", snapshot.User.Username)
	}
}

func TestIdentifyWithoutTokenOrCookie(t *testing.T) {
	f := newFixture(t)
	conn, _ := f.dial(t)
	send(t, conn, gateway.OpIdentify, map[string]any{})
	response := readEnvelope(t, conn)
	if response.Op != gateway.OpInvalidSess {
		t.Fatalf("op = %d, want INVALID_SESSION", response.Op)
	}
}

func TestHeartbeatAck(t *testing.T) {
	f := newFixture(t)
	token := registerUser(t, f, "heartbeat_user", "heartbeat@example.com")
	conn, _ := f.dial(t)
	send(t, conn, gateway.OpIdentify, map[string]any{"token": token})
	if ready := readEnvelope(t, conn); ready.T != "READY" {
		t.Fatalf("expected READY, got %q", ready.T)
	}

	send(t, conn, gateway.OpHeartbeat, nil)
	ack := readEnvelope(t, conn)
	if ack.Op != gateway.OpHeartbeatAck {
		t.Fatalf("op = %d, want HEARTBEAT_ACK (%d)", ack.Op, gateway.OpHeartbeatAck)
	}
}

func TestDispatchReachesConnectedClient(t *testing.T) {
	f := newFixture(t)
	token := registerUser(t, f, "dispatch_user", "dispatch@example.com")
	conn, _ := f.dial(t)
	send(t, conn, gateway.OpIdentify, map[string]any{"token": token})
	if ready := readEnvelope(t, conn); ready.T != "READY" {
		t.Fatalf("expected READY, got %q", ready.T)
	}

	f.service.Dispatch("MEMBER_UPDATE", map[string]any{"nickname": "новый ник"})
	event := readEnvelope(t, conn)
	if event.T != "MEMBER_UPDATE" {
		t.Fatalf("event = %q, want MEMBER_UPDATE", event.T)
	}
	if event.S <= 1 {
		t.Fatalf("dispatch sequence = %d, want greater than READY", event.S)
	}
}

func TestResumeReplaysMissedEvents(t *testing.T) {
	f := newFixture(t)
	token := registerUser(t, f, "resume_user", "resume@example.com")

	conn, _ := f.dial(t)
	send(t, conn, gateway.OpIdentify, map[string]any{"token": token})
	ready := readEnvelope(t, conn)

	// Пока клиент отключён, приходят события.
	_ = conn.Close(websocket.StatusNormalClosure, "test disconnect")
	deadline := time.Now().Add(2 * time.Second)
	for f.service.ActiveSessions() > 0 && time.Now().Before(deadline) {
		time.Sleep(10 * time.Millisecond)
	}
	f.service.Dispatch("CHANNEL_CREATE", map[string]any{"name": "новый"})

	// Переподключение с RESUME по последней известной последовательности.
	second, _ := f.dial(t)
	send(t, second, gateway.OpResume, map[string]any{"token": token, "resume_seq": ready.S})
	replayed := readEnvelope(t, second)
	if replayed.T != "CHANNEL_CREATE" {
		t.Fatalf("resume replay = %q, want CHANNEL_CREATE", replayed.T)
	}

	// RESUME с неизвестной последовательностью: INVALID_SESSION с признаком
	// resumable и следом полный READY (AGENT.md 8.3).
	third, _ := f.dial(t)
	send(t, third, gateway.OpResume, map[string]any{"token": token, "resume_seq": ready.S + 10000})
	invalid := readEnvelope(t, third)
	if invalid.Op != gateway.OpInvalidSess {
		t.Fatalf("stale resume op = %d, want INVALID_SESSION", invalid.Op)
	}
	var invalidPayload struct {
		Resumable bool `json:"resumable"`
	}
	if err := json.Unmarshal(invalid.D, &invalidPayload); err != nil {
		t.Fatalf("decode INVALID_SESSION: %v", err)
	}
	if !invalidPayload.Resumable {
		t.Fatal("resume failure must be marked resumable: the client keeps the session")
	}
	full := readEnvelope(t, third)
	if full.T != "READY" {
		t.Fatalf("stale resume = %q, want full READY", full.T)
	}
}