package main

import (
	"database/sql"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"net/http/httptest"
	"net/url"
	"reflect"
	"strconv"
	"strings"
	"testing"
	"time"

	"bookmarkmanager/backend/internal/session"
	"bookmarkmanager/backend/internal/store"
	"bookmarkmanager/backend/internal/web"

	_ "github.com/jackc/pgx/v5/stdlib"
)

const testOwnerID = "owner-snowflake"

// webConfig returns a config whose web UI is usable: Discord identity is set,
// though the OAuth endpoints still need the stub URL from discordConfig.
func webConfig() Config {
	cfg := testConfig()
	cfg.Discord.OwnerDiscordID = testOwnerID
	return cfg
}

// newWebTestServer returns the full router plus the store behind it, so tests
// can seed rows and assert on what the handlers wrote back.
func newWebTestServer(t *testing.T, cfg Config) (http.Handler, *store.Store) {
	t.Helper()
	st := newTestStore(t)
	return newRouter(st, cfg), st
}

// sessionCookie mints a live session row for the owner and returns the cookie
// carrying its id — the only credential the UI accepts.
func sessionCookie(t *testing.T, st *store.Store) *http.Cookie {
	t.Helper()
	sess, err := st.CreateSession(session.NewID(), st.OwnerID(), session.SessionTTL)
	if err != nil {
		t.Fatalf("CreateSession: %v", err)
	}
	return &http.Cookie{Name: session.CookieName, Value: sess.ID}
}

// discordStub is a minimal Discord API. The router is pointed at it through
// the configured API base URL, so the real request construction — including
// the form-encoded token exchange — is what the tests exercise, not an
// injected client interface.
type discordStub struct {
	ownerID      string   // id /users/@me answers
	member       bool     // whether the member endpoint reports membership
	roles        []string // roles the member holds
	tokenStatus  int      // status the token endpoint answers; 0 = 200
	userStatus   int      // status users/@me answers; 0 = 200
	memberStatus int      // status the member endpoint answers; 0 = member ? 200 : 404

	tokenRequests []tokenRequest // recorded token exchanges
	userAuth      []string       // Authorization headers seen on users/@me
	memberAuth    []string       // Authorization headers seen on the member endpoint
	memberPaths   []string
}

type tokenRequest struct {
	contentType string
	form        url.Values
}

func newDiscordStub(t *testing.T) (*discordStub, *httptest.Server) {
	t.Helper()
	st := &discordStub{ownerID: testOwnerID, member: true}
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch {
		case r.URL.Path == "/oauth2/token":
			body, _ := io.ReadAll(r.Body)
			form, _ := url.ParseQuery(string(body))
			st.tokenRequests = append(st.tokenRequests, tokenRequest{
				contentType: r.Header.Get("Content-Type"),
				form:        form,
			})
			status := st.tokenStatus
			if status == 0 {
				status = http.StatusOK
			}
			w.WriteHeader(status)
			if status == http.StatusOK {
				fmt.Fprintf(w, `{"access_token":"tok-%d","token_type":"Bearer"}`, len(st.tokenRequests))
			}
		case r.URL.Path == "/users/@me":
			st.userAuth = append(st.userAuth, r.Header.Get("Authorization"))
			status := st.userStatus
			if status == 0 {
				status = http.StatusOK
			}
			w.WriteHeader(status)
			if status == http.StatusOK {
				fmt.Fprintf(w, `{"id":%q,"username":"owner"}`, st.ownerID)
			}
		// Discord answers the bot endpoint with 401 for a user Bearer token.
		// Standing in for that keeps a regression onto it loud: without this
		// the request would fall through to 404 and read as "not a member",
		// which is a refusal the caller treats as ordinary.
		case strings.HasPrefix(r.URL.Path, "/guilds/"):
			w.WriteHeader(http.StatusUnauthorized)
		case strings.HasPrefix(r.URL.Path, "/users/@me/guilds/"):
			st.memberPaths = append(st.memberPaths, r.URL.Path)
			st.memberAuth = append(st.memberAuth, r.Header.Get("Authorization"))
			status := st.memberStatus
			if status == 0 {
				if st.member {
					status = http.StatusOK
				} else {
					status = http.StatusNotFound
				}
			}
			w.WriteHeader(status)
			if status == http.StatusOK {
				roles, _ := json.Marshal(st.roles)
				fmt.Fprintf(w, `{"roles":%s}`, roles)
			}
		default:
			http.NotFound(w, r)
		}
	}))
	t.Cleanup(srv.Close)
	return st, srv
}

// discordConfig is the OAuth application config every sign-in test uses, with
// the API base pointed at a stub.
func discordConfig(stubURL string) web.DiscordConfig {
	return web.DiscordConfig{
		ClientID:       "client-1",
		ClientSecret:   "client-secret-1",
		GuildID:        "guild-1",
		APIBase:        stubURL,
		RedirectURI:    "https://bm.example.com/auth/discord/callback",
		OwnerDiscordID: testOwnerID,
	}
}

// oauthWebTestServer returns the full router, its store, and a Discord stub
// wired as the configured API — the starting point for sign-in tests.
func oauthWebTestServer(t *testing.T) (http.Handler, *store.Store, *discordStub) {
	t.Helper()
	stub, srv := newDiscordStub(t)
	cfg := webConfig()
	cfg.Discord = discordConfig(srv.URL)
	router, st := newWebTestServer(t, cfg)
	return router, st, stub
}

// startSignIn runs GET /auth/discord and returns the state Discord would echo
// back. A failed start fails the test.
func startSignIn(t *testing.T, srv http.Handler) string {
	t.Helper()
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, httptest.NewRequest(http.MethodGet, "/auth/discord", nil))
	if rr.Code != http.StatusSeeOther {
		t.Fatalf("GET /auth/discord status = %d, want 303", rr.Code)
	}
	loc, err := url.Parse(rr.Header().Get("Location"))
	if err != nil {
		t.Fatalf("Location %q: %v", rr.Header().Get("Location"), err)
	}
	if loc.Path != "/oauth2/authorize" {
		t.Fatalf("redirect path = %q, want /oauth2/authorize", loc.Path)
	}
	if state := loc.Query().Get("state"); state != "" {
		return state
	}
	t.Fatal("authorize URL carries no state")
	return ""
}

// completeSignIn drives the callback with a fresh code for state.
func completeSignIn(t *testing.T, srv http.Handler, state string) *httptest.ResponseRecorder {
	t.Helper()
	req := httptest.NewRequest(http.MethodGet,
		"/auth/discord/callback?code=discord-code-1&state="+url.QueryEscape(state), nil)
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, req)
	return rr
}

// readerCount pokes the readers table directly — the refusal contract is that
// nothing was created, which the store API would not show.
func readerCount(t *testing.T, url string) int {
	t.Helper()
	db, err := sql.Open("pgx", url)
	if err != nil {
		t.Fatalf("open: %v", err)
	}
	defer db.Close()
	var n int
	if err := db.QueryRow(`SELECT count(*) FROM readers`).Scan(&n); err != nil {
		t.Fatalf("count readers: %v", err)
	}
	return n
}

func TestIndexWithoutSessionShowsLogin(t *testing.T) {
	srv, _ := newWebTestServer(t, webConfig())
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, httptest.NewRequest(http.MethodGet, "/", nil))

	if rr.Code != http.StatusOK {
		t.Fatalf("GET / status = %d, want 200", rr.Code)
	}
	if !strings.Contains(rr.Body.String(), "Continue with Discord") {
		t.Fatal("GET / without a session did not render the Discord sign-in button")
	}
}

func TestIndexWithSessionShowsList(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	if _, err := st.Upsert(st.OwnerID(), store.Bookmark{
		Key: "asura:solo", Site: "asura", SeriesID: "solo",
		Title: "Solo Leveling", LastChapter: "45", LastChapterNum: 45,
		UpdatedAt: time.Now().UnixMilli(),
	}); err != nil {
		t.Fatalf("Upsert: %v", err)
	}

	req := httptest.NewRequest(http.MethodGet, "/", nil)
	req.AddCookie(sessionCookie(t, st))
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, req)

	if rr.Code != http.StatusOK {
		t.Fatalf("GET / status = %d, want 200", rr.Code)
	}
	if !strings.Contains(rr.Body.String(), "Solo Leveling") {
		t.Fatal("GET / with a session did not render the bookmark title")
	}
}

func TestDiscordLoginFullFlow(t *testing.T) {
	srv, st, stub := oauthWebTestServer(t)

	// The authorize redirect carries the app, the scopes the gate needs, and
	// a fresh state.
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, httptest.NewRequest(http.MethodGet, "/auth/discord", nil))
	if rr.Code != http.StatusSeeOther {
		t.Fatalf("GET /auth/discord status = %d, want 303", rr.Code)
	}
	loc, err := url.Parse(rr.Header().Get("Location"))
	if err != nil {
		t.Fatalf("Location: %v", err)
	}
	q := loc.Query()
	if q.Get("client_id") != "client-1" || q.Get("response_type") != "code" {
		t.Fatalf("authorize query = %v, want client_id client-1 and response_type code", q)
	}
	if q.Get("redirect_uri") != "https://bm.example.com/auth/discord/callback" {
		t.Fatalf("redirect_uri = %q, want the configured callback", q.Get("redirect_uri"))
	}
	for _, want := range []string{"identify", "guilds.members.read"} {
		if !strings.Contains(q.Get("scope"), want) {
			t.Fatalf("scope %q missing %s", q.Get("scope"), want)
		}
	}
	state := q.Get("state")
	if state == "" {
		t.Fatal("authorize URL carries no state")
	}

	// The callback lands the reader logged in.
	rr = completeSignIn(t, srv, state)
	if rr.Code != http.StatusSeeOther {
		t.Fatalf("callback status = %d, want 303 (body %s)", rr.Code, rr.Body.String())
	}
	cookies := rr.Result().Cookies()
	if len(cookies) != 1 || cookies[0].Name != session.CookieName || cookies[0].Value == "" {
		t.Fatalf("callback cookies = %+v, want one non-empty %s", cookies, session.CookieName)
	}

	// The token exchange went out form-encoded — the wire format Discord
	// rejects if JSON — with every field Discord requires.
	if len(stub.tokenRequests) != 1 {
		t.Fatalf("token exchanges = %d, want 1", len(stub.tokenRequests))
	}
	tr := stub.tokenRequests[0]
	if !strings.HasPrefix(tr.contentType, "application/x-www-form-urlencoded") {
		t.Fatalf("token exchange Content-Type = %q, want form-urlencoded", tr.contentType)
	}
	wantForm := url.Values{
		"client_id":     {"client-1"},
		"client_secret": {"client-secret-1"},
		"grant_type":    {"authorization_code"},
		"code":          {"discord-code-1"},
		"redirect_uri":  {"https://bm.example.com/auth/discord/callback"},
	}
	if !reflect.DeepEqual(tr.form, wantForm) {
		t.Fatalf("token form = %v, want %v", tr.form, wantForm)
	}

	// Identity and membership were fetched with the exchanged token, and the
	// membership check used the OAuth single-guild endpoint — the one
	// guilds.members.read grants, not its bot-token twin.
	if len(stub.userAuth) != 1 || stub.userAuth[0] != "Bearer tok-1" {
		t.Fatalf("users/@me Authorization = %v, want [Bearer tok-1]", stub.userAuth)
	}
	if len(stub.memberPaths) != 1 || stub.memberPaths[0] != "/users/@me/guilds/guild-1/member" {
		t.Fatalf("member requests = %v, want the OAuth single-guild endpoint", stub.memberPaths)
	}
	if len(stub.memberAuth) != 1 || stub.memberAuth[0] != "Bearer tok-1" {
		t.Fatalf("member Authorization = %v, want [Bearer tok-1]", stub.memberAuth)
	}

	// The session row exists, and the cookie it minted opens the library.
	if _, ok, err := st.GetSession(cookies[0].Value, time.Now()); err != nil || !ok {
		t.Fatalf("session row: ok=%v err=%v, want ok", ok, err)
	}
	req := httptest.NewRequest(http.MethodGet, "/", nil)
	req.AddCookie(cookies[0])
	rr = httptest.NewRecorder()
	srv.ServeHTTP(rr, req)
	if rr.Code != http.StatusOK || strings.Contains(rr.Body.String(), "Continue with Discord") {
		t.Fatalf("GET / with the new cookie = %d, still showing the login page", rr.Code)
	}
}

func TestDiscordCallbackRejectsMissingState(t *testing.T) {
	srv, _, stub := oauthWebTestServer(t)
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, httptest.NewRequest(http.MethodGet,
		"/auth/discord/callback?code=discord-code-1", nil))
	if rr.Code != http.StatusBadRequest {
		t.Fatalf("status = %d, want 400", rr.Code)
	}
	if len(rr.Result().Cookies()) != 0 {
		t.Fatal("a refused callback set a cookie")
	}
	if len(stub.tokenRequests) != 0 || len(stub.userAuth) != 0 {
		t.Fatal("a state-less callback still called Discord")
	}
}

func TestDiscordCallbackRejectsMismatchedState(t *testing.T) {
	srv, _, stub := oauthWebTestServer(t)
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, httptest.NewRequest(http.MethodGet,
		"/auth/discord/callback?code=discord-code-1&state=not-the-state", nil))
	if rr.Code != http.StatusBadRequest {
		t.Fatalf("status = %d, want 400", rr.Code)
	}
	if len(rr.Result().Cookies()) != 0 {
		t.Fatal("a refused callback set a cookie")
	}
	if len(stub.tokenRequests) != 0 || len(stub.userAuth) != 0 {
		t.Fatal("a mismatched-state callback still called Discord")
	}
}

// A state is single-use: replaying a consumed callback is refused.
func TestDiscordCallbackStateIsSingleUse(t *testing.T) {
	srv, _, _ := oauthWebTestServer(t)
	state := startSignIn(t, srv)
	if rr := completeSignIn(t, srv, state); rr.Code != http.StatusSeeOther {
		t.Fatalf("first use status = %d, want 303", rr.Code)
	}
	rr := completeSignIn(t, srv, state)
	if rr.Code != http.StatusBadRequest {
		t.Fatalf("replayed state status = %d, want 400", rr.Code)
	}
}

// TestDiscordLoginRefusesNonMember covers the refusals that must read the
// same: no membership, membership without the required role, and a member
// endpoint that answers 403 (token lacking the scope). Neither may leak the
// guild's existence or id, and neither may create anything.
func TestDiscordLoginRefusesNonMember(t *testing.T) {
	cases := []struct {
		name         string
		member       bool
		memberStatus int
		roles        []string
		require      string
	}{
		{"not a member", false, 0, nil, ""},
		{"missing the required role", true, 0, []string{"role-1"}, "role-2"},
		{"member endpoint 403", true, http.StatusForbidden, nil, ""},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			stub, srv := newDiscordStub(t)
			stub.member = tc.member
			stub.memberStatus = tc.memberStatus
			stub.roles = tc.roles
			cfg := webConfig()
			cfg.Discord = discordConfig(srv.URL)
			cfg.Discord.RequiredRole = tc.require
			st, dbURL := newTestStoreURL(t)
			router := newRouter(st, cfg)

			rr := completeSignIn(t, router, startSignIn(t, router))
			if rr.Code != http.StatusForbidden {
				t.Fatalf("status = %d, want 403", rr.Code)
			}
			if !strings.Contains(rr.Body.String(), "not a member of this community") {
				t.Fatalf("refusal body = %q, want the clear non-member explanation", rr.Body.String())
			}
			if strings.Contains(rr.Body.String(), "guild-1") {
				t.Fatalf("refusal body = %q, leaks the guild id", rr.Body.String())
			}
			if len(rr.Result().Cookies()) != 0 {
				t.Fatal("a refused sign-in set a cookie")
			}
			// The seed owner is still the only Reader, and no session exists.
			if n := readerCount(t, dbURL); n != 1 {
				t.Fatalf("readers = %d after a refusal, want 1", n)
			}
		})
	}
}

// The positive role-gated path: a member holding the required role signs in.
func TestDiscordLoginRequiresRolePositive(t *testing.T) {
	stub, srv := newDiscordStub(t)
	stub.roles = []string{"role-1"}
	cfg := webConfig()
	cfg.Discord = discordConfig(srv.URL)
	cfg.Discord.RequiredRole = "role-1"
	router, st := newWebTestServer(t, cfg)

	rr := completeSignIn(t, router, startSignIn(t, router))
	if rr.Code != http.StatusSeeOther {
		t.Fatalf("status = %d, want 303 (body %s)", rr.Code, rr.Body.String())
	}
	cookies := rr.Result().Cookies()
	if len(cookies) != 1 || cookies[0].Value == "" {
		t.Fatalf("cookies = %+v, want a session cookie", cookies)
	}
	if _, ok, err := st.GetSession(cookies[0].Value, time.Now()); err != nil || !ok {
		t.Fatalf("session row: ok=%v err=%v, want ok", ok, err)
	}
}

func TestDiscordLoginRefusesNonOwner(t *testing.T) {
	stub, srv := newDiscordStub(t)
	stub.ownerID = "someone-elses-snowflake"
	cfg := webConfig()
	cfg.Discord = discordConfig(srv.URL)
	router, st := newWebTestServer(t, cfg)

	rr := completeSignIn(t, router, startSignIn(t, router))
	if rr.Code != http.StatusForbidden {
		t.Fatalf("status = %d, want 403", rr.Code)
	}
	if !strings.Contains(rr.Body.String(), "not the library owner") {
		t.Fatalf("refusal body = %q, want the owner-only explanation", rr.Body.String())
	}
	if len(rr.Result().Cookies()) != 0 {
		t.Fatal("a refused sign-in set a cookie")
	}
	if sess, ok, _ := st.GetSession("anything", time.Now()); ok && sess.ID != "" {
		t.Fatal("a refused sign-in created a session")
	}
}

func TestDiscordLoginTokenEndpointDown(t *testing.T) {
	stub, srv := newDiscordStub(t)
	stub.tokenStatus = http.StatusInternalServerError
	cfg := webConfig()
	cfg.Discord = discordConfig(srv.URL)
	router, _ := newWebTestServer(t, cfg)

	rr := completeSignIn(t, router, startSignIn(t, router))
	if rr.Code != http.StatusBadGateway {
		t.Fatalf("status = %d, want 502", rr.Code)
	}
	if !strings.Contains(rr.Body.String(), "unavailable") {
		t.Fatalf("body = %q, want the unavailable message", rr.Body.String())
	}
	if len(rr.Result().Cookies()) != 0 {
		t.Fatal("a failed sign-in set a cookie")
	}
}

func TestCallbackRateLimited(t *testing.T) {
	srv, _, _ := oauthWebTestServer(t)
	call := func() *httptest.ResponseRecorder {
		req := httptest.NewRequest(http.MethodGet,
			"/auth/discord/callback?code=x&state=not-the-state", nil)
		req.Header.Set("X-Forwarded-For", "203.0.113.9")
		rr := httptest.NewRecorder()
		srv.ServeHTTP(rr, req)
		return rr
	}
	for i := 0; i < session.MaxFailures; i++ {
		if code := call().Code; code != http.StatusBadRequest {
			t.Fatalf("attempt %d status = %d, want 400", i+1, code)
		}
	}
	rr := call()
	if rr.Code != http.StatusTooManyRequests {
		t.Fatalf("attempt %d status = %d, want 429", session.MaxFailures+1, rr.Code)
	}
	if after := rr.Header().Get("Retry-After"); after == "" {
		t.Fatal("429 response has no Retry-After header")
	} else if n, err := strconv.Atoi(after); err != nil || n <= 0 {
		t.Fatalf("Retry-After = %q, want a positive integer", after)
	}
}

func TestLogoutDeletesSession(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	cookie := sessionCookie(t, st)

	req := httptest.NewRequest(http.MethodPost, "/logout", nil)
	req.AddCookie(cookie)
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, req)

	if rr.Code != http.StatusSeeOther {
		t.Fatalf("POST /logout status = %d, want 303", rr.Code)
	}
	cookies := rr.Result().Cookies()
	if len(cookies) != 1 || cookies[0].MaxAge >= 0 {
		t.Fatalf("POST /logout cookies = %+v, want one expiring cookie", cookies)
	}
	// The row is gone, so the same cookie is dead on the next request.
	if _, ok, _ := st.GetSession(cookie.Value, time.Now()); ok {
		t.Fatal("session row still present after logout")
	}
	req = httptest.NewRequest(http.MethodGet, "/", nil)
	req.AddCookie(cookie)
	rr = httptest.NewRecorder()
	srv.ServeHTTP(rr, req)
	if !strings.Contains(rr.Body.String(), "Continue with Discord") {
		t.Fatal("GET / after logout still rendered the library")
	}
}

func TestExpiredSessionRejected(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	sess, err := st.CreateSession(session.NewID(), st.OwnerID(), -time.Minute)
	if err != nil {
		t.Fatalf("CreateSession: %v", err)
	}
	cookie := &http.Cookie{Name: session.CookieName, Value: sess.ID}

	req := httptest.NewRequest(http.MethodGet, "/", nil)
	req.AddCookie(cookie)
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, req)
	if rr.Code != http.StatusOK || !strings.Contains(rr.Body.String(), "Continue with Discord") {
		t.Fatalf("GET / with an expired session = %d, want the login page", rr.Code)
	}

	req = httptest.NewRequest(http.MethodGet, "/ui/list", nil)
	req.AddCookie(cookie)
	rr = httptest.NewRecorder()
	srv.ServeHTTP(rr, req)
	if rr.Code != http.StatusUnauthorized {
		t.Fatalf("GET /ui/list with an expired session = %d, want 401", rr.Code)
	}
}

func TestBookmarksAPIStillBearerOnly(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)

	// A session cookie must not grant access to the userscript's JSON API.
	req := httptest.NewRequest(http.MethodGet, "/bookmarks", nil)
	req.AddCookie(sessionCookie(t, st))
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, req)
	if rr.Code != http.StatusUnauthorized {
		t.Fatalf("GET /bookmarks with only a cookie = %d, want 401", rr.Code)
	}

	// And the bearer token must still work.
	rr = httptest.NewRecorder()
	srv.ServeHTTP(rr, auth(httptest.NewRequest(http.MethodGet, "/bookmarks", nil)))
	if rr.Code != http.StatusOK {
		t.Fatalf("GET /bookmarks with bearer = %d, want 200", rr.Code)
	}
}

func TestStaticAssetsServed(t *testing.T) {
	srv, _ := newWebTestServer(t, webConfig())
	for _, path := range []string{"/static/style.css", "/static/htmx.min.js", "/static/filter.js", "/static/logo.svg", "/static/login-art.png"} {
		rr := httptest.NewRecorder()
		srv.ServeHTTP(rr, httptest.NewRequest(http.MethodGet, path, nil))
		if rr.Code != http.StatusOK {
			t.Fatalf("GET %s = %d, want 200", path, rr.Code)
		}
		if rr.Body.Len() == 0 {
			t.Fatalf("GET %s returned an empty body", path)
		}
	}
}

// seed inserts one bookmark and returns it as stored.
func seed(t *testing.T, st *store.Store, b store.Bookmark) store.Bookmark {
	t.Helper()
	stored, err := st.Upsert(st.OwnerID(), b)
	if err != nil {
		t.Fatalf("Upsert: %v", err)
	}
	return stored
}

func uiRequest(t *testing.T, st *store.Store, method, path string, form url.Values) *http.Request {
	t.Helper()
	var req *http.Request
	if form == nil {
		req = httptest.NewRequest(method, path, nil)
	} else {
		req = httptest.NewRequest(method, path, strings.NewReader(form.Encode()))
		req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	}
	req.AddCookie(sessionCookie(t, st))
	return req
}

func TestUIRoutesRequireSession(t *testing.T) {
	srv, _ := newWebTestServer(t, webConfig())
	cases := []struct{ method, path string }{
		{http.MethodGet, "/ui/list"},
		{http.MethodPost, "/ui/bookmarks/asura:solo/favorite"},
		{http.MethodPost, "/ui/bookmarks/asura:solo/chapter"},
		{http.MethodDelete, "/ui/bookmarks/asura:solo"},
	}
	for _, tc := range cases {
		t.Run(tc.method+" "+tc.path, func(t *testing.T) {
			rr := httptest.NewRecorder()
			srv.ServeHTTP(rr, httptest.NewRequest(tc.method, tc.path, nil))
			if rr.Code != http.StatusUnauthorized {
				t.Fatalf("status = %d, want 401", rr.Code)
			}
		})
	}
}

func TestFavoriteTogglesWithoutReordering(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	before := seed(t, st, store.Bookmark{
		Key: "asura:solo", Site: "asura", SeriesID: "solo",
		Title: "Solo Leveling", LastChapter: "45", LastChapterNum: 45,
		UpdatedAt: 1_000_000,
	})

	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, uiRequest(t, st, http.MethodPost, "/ui/bookmarks/asura:solo/favorite", nil))
	if rr.Code != http.StatusOK {
		t.Fatalf("favorite status = %d, want 200", rr.Code)
	}

	after, ok, err := st.Get(st.OwnerID(), "asura:solo")
	if err != nil || !ok {
		t.Fatalf("Get after favorite: %v ok=%v", err, ok)
	}
	if !after.Favorite {
		t.Fatal("Favorite = false after toggling, want true")
	}
	if after.UpdatedAt != before.UpdatedAt {
		t.Fatalf("UpdatedAt moved from %d to %d; favouriting must not reorder the list",
			before.UpdatedAt, after.UpdatedAt)
	}
	if !strings.Contains(rr.Body.String(), `id="card-asura:solo"`) {
		t.Fatal("favorite response did not render the card fragment")
	}

	// Toggling again turns it back off.
	rr = httptest.NewRecorder()
	srv.ServeHTTP(rr, uiRequest(t, st, http.MethodPost, "/ui/bookmarks/asura:solo/favorite", nil))
	back, _, _ := st.Get(st.OwnerID(), "asura:solo")
	if back.Favorite {
		t.Fatal("Favorite = true after a second toggle, want false")
	}
}

// TestCardHxTargetIsValidSelectorForColonKey asserts the rendered card's
// hx-target attributes use the fixed-string attribute-selector form
// ([id='card-<key>']) rather than a bare CSS id-selector (#card-<key>).
//
// A key like "asura:solo" makes "#card-asura:solo" an invalid CSS selector:
// the browser parses ":solo" as an unrecognised pseudo-class and htmx's
// querySelectorAll throws SyntaxError, so the button never resolves its
// swap target. httptest never executes htmx, so this only checks the
// rendered attribute's shape — it is not proof the browser accepts the
// selector, just a regression guard against reintroducing the bare-id form.
func TestCardHxTargetIsValidSelectorForColonKey(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seed(t, st, store.Bookmark{
		Key: "asura:solo", Site: "asura", SeriesID: "solo",
		Title: "Solo Leveling", LastChapter: "45", LastChapterNum: 45,
		UpdatedAt: 1_000_000,
	})

	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, uiRequest(t, st, http.MethodGet, "/ui/list", nil))
	if rr.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200", rr.Code)
	}
	body := rr.Body.String()

	want := `hx-target="[id='card-asura:solo']"`
	if strings.Count(body, want) != 5 {
		t.Fatalf("body has %d occurrences of %s, want 5 (favorite, archive, finish, delete buttons, chapter form)",
			strings.Count(body, want), want)
	}
	if strings.Contains(body, `hx-target="#card-asura:solo"`) {
		t.Fatal("body still uses the bare id CSS selector, which is invalid for a key containing ':'")
	}
}

func TestChapterOverrideMovesUpdatedAt(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	before := seed(t, st, store.Bookmark{
		Key: "asura:solo", Site: "asura", SeriesID: "solo",
		Title: "Solo Leveling", LastChapter: "45", LastChapterNum: 45,
		LastChapterURL: "https://example.test/ch/45", SeriesURL: "https://example.test/solo",
		UpdatedAt: 1_000_000,
	})

	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, uiRequest(t, st, http.MethodPost,
		"/ui/bookmarks/asura:solo/chapter", url.Values{"chapter": {"60"}}))
	if rr.Code != http.StatusOK {
		t.Fatalf("chapter override status = %d, want 200", rr.Code)
	}

	after, ok, err := st.Get(st.OwnerID(), "asura:solo")
	if err != nil || !ok {
		t.Fatalf("Get after override: %v ok=%v", err, ok)
	}
	if after.LastChapterNum != 60 || after.LastChapter != "60" {
		t.Fatalf("chapter = %q/%v, want 60", after.LastChapter, after.LastChapterNum)
	}
	if after.UpdatedAt <= before.UpdatedAt {
		t.Fatalf("UpdatedAt = %d, want later than %d", after.UpdatedAt, before.UpdatedAt)
	}
	if after.LastChapterURL != "" {
		t.Fatalf("LastChapterURL = %q, want cleared by a manual override", after.LastChapterURL)
	}
	if after.Title != "Solo Leveling" {
		t.Fatalf("Title = %q, want the untouched fields preserved", after.Title)
	}
}

func TestChapterOverrideNoOpPreservesURLAndUpdatedAt(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	before := seed(t, st, store.Bookmark{
		Key: "asura:solo", Site: "asura", SeriesID: "solo",
		Title: "Solo Leveling", LastChapter: "45.0", LastChapterNum: 45,
		LastChapterURL: "https://example.test/ch/45", SeriesURL: "https://example.test/solo",
		UpdatedAt: 1_000_000,
	})

	// The chapter form is pre-filled with the current value, so tapping Save
	// without editing resubmits the unchanged number. That must be a no-op: it
	// must not clear last_chapter_url, rewrite the last_chapter display string,
	// or move updated_at. The seed stores "45.0" against 45 so the display
	// string differs from what the form submits back.
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, uiRequest(t, st, http.MethodPost,
		"/ui/bookmarks/asura:solo/chapter", url.Values{"chapter": {"45"}}))
	if rr.Code != http.StatusOK {
		t.Fatalf("chapter no-op status = %d, want 200", rr.Code)
	}

	after, ok, err := st.Get(st.OwnerID(), "asura:solo")
	if err != nil || !ok {
		t.Fatalf("Get after no-op override: %v ok=%v", err, ok)
	}
	if after.LastChapterURL != before.LastChapterURL {
		t.Fatalf("LastChapterURL = %q, want preserved %q on a no-op save",
			after.LastChapterURL, before.LastChapterURL)
	}
	if after.LastChapter != before.LastChapter {
		t.Fatalf("LastChapter = %q, want preserved %q on a no-op save",
			after.LastChapter, before.LastChapter)
	}
	if after.UpdatedAt != before.UpdatedAt {
		t.Fatalf("UpdatedAt = %d, want unchanged %d on a no-op save",
			after.UpdatedAt, before.UpdatedAt)
	}
}

func TestChapterOverrideRejectsBadInput(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seed(t, st, store.Bookmark{
		Key: "asura:solo", Site: "asura", SeriesID: "solo",
		Title: "Solo Leveling", LastChapterNum: 45, UpdatedAt: 1_000_000,
	})

	for _, bad := range []string{"", "abc", "-3", "NaN", "Infinity", "-Inf"} {
		t.Run("input "+bad, func(t *testing.T) {
			rr := httptest.NewRecorder()
			srv.ServeHTTP(rr, uiRequest(t, st, http.MethodPost,
				"/ui/bookmarks/asura:solo/chapter", url.Values{"chapter": {bad}}))
			if rr.Code != http.StatusBadRequest {
				t.Fatalf("status = %d, want 400", rr.Code)
			}
			after, _, _ := st.Get(st.OwnerID(), "asura:solo")
			if after.LastChapterNum != 45 {
				t.Fatalf("chapter changed to %v on invalid input", after.LastChapterNum)
			}
		})
	}
}

func TestMutationsOnMissingKey(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	cases := []struct {
		name string
		req  *http.Request
	}{
		{"favorite", uiRequest(t, st, http.MethodPost, "/ui/bookmarks/asura:nope/favorite", nil)},
		{"chapter", uiRequest(t, st, http.MethodPost, "/ui/bookmarks/asura:nope/chapter", url.Values{"chapter": {"1"}})},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			rr := httptest.NewRecorder()
			srv.ServeHTTP(rr, tc.req)
			if rr.Code != http.StatusNotFound {
				t.Fatalf("status = %d, want 404", rr.Code)
			}
		})
	}
}

func TestUIDeleteRemovesRow(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seed(t, st, store.Bookmark{
		Key: "asura:solo", Site: "asura", SeriesID: "solo",
		Title: "Solo Leveling", UpdatedAt: 1_000_000,
	})

	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, uiRequest(t, st, http.MethodDelete, "/ui/bookmarks/asura:solo", nil))
	if rr.Code != http.StatusOK {
		t.Fatalf("delete status = %d, want 200", rr.Code)
	}
	// The body carries only out-of-band chrome, so htmx has nothing to swap into
	// the card's place and the row disappears.
	body := rr.Body.String()
	if strings.Contains(body, `class="card`) {
		t.Fatalf("delete body = %q, want no card so htmx swaps it away", body)
	}
	if !strings.Contains(body, `id="new-count" hx-swap-oob="true"`) {
		t.Fatalf("delete body = %q, want the out-of-band badge", body)
	}
	if _, ok, _ := st.Get(st.OwnerID(), "asura:solo"); ok {
		t.Fatal("row still present after delete")
	}
}

func TestUIListFavouritesTab(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seed(t, st, store.Bookmark{
		Key: "asura:solo", Site: "asura", SeriesID: "solo",
		Title: "Solo Leveling", Favorite: true, UpdatedAt: 2_000_000,
	})
	seed(t, st, store.Bookmark{
		Key: "demonic:tower", Site: "demonic", SeriesID: "tower",
		Title: "Tower of God", Favorite: false, UpdatedAt: 1_000_000,
	})

	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, uiRequest(t, st, http.MethodGet, "/ui/list?tab=fav", nil))
	if rr.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200", rr.Code)
	}
	body := rr.Body.String()
	if !strings.Contains(body, "Solo Leveling") {
		t.Fatal("favourites tab omitted the favourited series")
	}
	if strings.Contains(body, "Tower of God") {
		t.Fatal("favourites tab included a non-favourite")
	}
}

func TestUIListNewTab(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seed(t, st, store.Bookmark{
		Key: "asura:solo", Site: "asura", SeriesID: "solo",
		Title: "Solo Leveling", LastChapterNum: 10,
		LatestChapter: "Chapter 12", LatestChapterNum: floatPtr(12),
		UpdatedAt: 2_000_000,
	})
	seed(t, st, store.Bookmark{
		Key: "demonic:tower", Site: "demonic", SeriesID: "tower",
		Title: "Tower of God", LastChapterNum: 5,
		LatestChapter: "Chapter 5", LatestChapterNum: floatPtr(5),
		UpdatedAt: 1_000_000,
	})

	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, uiRequest(t, st, http.MethodGet, "/ui/list?tab=new", nil))
	if rr.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200", rr.Code)
	}
	body := rr.Body.String()
	if !strings.Contains(body, "Solo Leveling") {
		t.Fatal("new tab omitted the series with an unread chapter")
	}
	if strings.Contains(body, "Tower of God") {
		t.Fatal("new tab included a series already caught up")
	}
}

// seedStatusRows puts one series in each bucket, the archived one also
// favourited and with a new chapter out, so a leak into any reading-bucket tab
// shows up as a failure rather than passing by accident.
func seedStatusRows(t *testing.T, st *store.Store) {
	t.Helper()
	// floatPtr already exists in store_test.go — same package, reuse it.
	rows := []store.Bookmark{
		{Key: "asura:reading", Site: "asura", SeriesID: "reading", Title: "ReadingOne",
			Status: store.StatusReading, LastChapterNum: 10, Favorite: true,
			LatestChapter: "11", LatestChapterNum: floatPtr(11)},
		{Key: "asura:archived", Site: "asura", SeriesID: "archived", Title: "ArchivedOne",
			Status: store.StatusArchived, LastChapterNum: 5, Favorite: true,
			LatestChapter: "99", LatestChapterNum: floatPtr(99)},
		{Key: "asura:finished", Site: "asura", SeriesID: "finished", Title: "FinishedOne",
			Status: store.StatusFinished, LastChapterNum: 200, Favorite: true},
	}
	for _, b := range rows {
		b.UpdatedAt = time.Now().UnixMilli()
		if _, err := st.Upsert(st.OwnerID(), b); err != nil {
			t.Fatalf("seed %s: %v", b.Key, err)
		}
	}
}

func TestTabsShowOnlyTheirBucket(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seedStatusRows(t, st)

	cases := []struct {
		tab            string
		want, dontWant []string
	}{
		{"all", []string{"ReadingOne"}, []string{"ArchivedOne", "FinishedOne"}},
		{"new", []string{"ReadingOne"}, []string{"ArchivedOne", "FinishedOne"}},
		{"fav", []string{"ReadingOne"}, []string{"ArchivedOne", "FinishedOne"}},
		{"archived", []string{"ArchivedOne"}, []string{"ReadingOne", "FinishedOne"}},
		{"finished", []string{"FinishedOne"}, []string{"ReadingOne", "ArchivedOne"}},
	}
	for _, tc := range cases {
		t.Run(tc.tab, func(t *testing.T) {
			req := httptest.NewRequest(http.MethodGet, "/ui/list?tab="+tc.tab, nil)
			req.AddCookie(sessionCookie(t, st))
			rr := httptest.NewRecorder()
			srv.ServeHTTP(rr, req)

			if rr.Code != http.StatusOK {
				t.Fatalf("status = %d, want 200", rr.Code)
			}
			body := rr.Body.String()
			for _, w := range tc.want {
				if !strings.Contains(body, w) {
					t.Fatalf("tab %s missing %s", tc.tab, w)
				}
			}
			for _, d := range tc.dontWant {
				if strings.Contains(body, d) {
					t.Fatalf("tab %s leaked %s", tc.tab, d)
				}
			}
		})
	}
}

// stripOf returns everything above the list, which is where the recent section
// renders.
func stripOf(t *testing.T, srv http.Handler, st *store.Store, tab string) string {
	t.Helper()
	req := httptest.NewRequest(http.MethodGet, "/?tab="+tab, nil)
	req.AddCookie(sessionCookie(t, st))
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, req)
	body := rr.Body.String()
	if i := strings.Index(body, `id="list"`); i >= 0 {
		body = body[:i]
	}
	return body
}

// The strip carries the series with a chapter waiting — the one thing the
// updated_at-ordered list below it does not already say — and only on All.
func TestRecentStripCarriesUnreadOnlyAndOnlyOnAll(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seedStatusRows(t, st) // ReadingOne is at 10 with 11 out; the rest are not reading

	// A reading series that is caught up has nothing waiting, so it stays out.
	caught := store.Bookmark{
		Key: "asura:caught", Site: "asura", SeriesID: "caught", Title: "CaughtUpOne",
		Status: store.StatusReading, LastChapterNum: 40, LatestChapter: "40",
		LatestChapterNum: floatPtr(40), UpdatedAt: time.Now().UnixMilli(),
	}
	if _, err := st.Upsert(st.OwnerID(), caught); err != nil {
		t.Fatalf("seed %s: %v", caught.Key, err)
	}

	strip := stripOf(t, srv, st, "all")
	if !strings.Contains(strip, "ReadingOne") {
		t.Fatal("strip dropped the series with an unread chapter")
	}
	for _, unwanted := range []string{"CaughtUpOne", "ArchivedOne", "FinishedOne"} {
		if strings.Contains(strip, unwanted) {
			t.Fatalf("strip included %s", unwanted)
		}
	}
	for _, tab := range []string{"new", "fav", "archived", "finished"} {
		if strings.Contains(stripOf(t, srv, st, tab), "ReadingOne") {
			t.Fatalf("tab %s rendered the strip", tab)
		}
	}

	// Nothing new anywhere: the strip has nothing to say and does not render.
	reading, _, err := st.Get(st.OwnerID(), "asura:reading")
	if err != nil {
		t.Fatalf("Get: %v", err)
	}
	reading.LatestChapterNum = floatPtr(reading.LastChapterNum)
	if _, err := st.Upsert(st.OwnerID(), reading); err != nil {
		t.Fatalf("Upsert: %v", err)
	}
	// The section still ships (an out-of-band swap needs the id to exist) but
	// carries no cards and is hidden.
	empty := stripOf(t, srv, st, "all")
	if strings.Contains(empty, "recent-card") {
		t.Fatal("strip rendered cards with no unread chapters anywhere")
	}
	if !strings.Contains(empty, `id="recent" hidden`) {
		t.Fatalf("strip not hidden with nothing new: %q", empty)
	}
}

// The strip never grows past web.RecentCount, however many series are waiting.
func TestRecentStripCapped(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	for i := 0; i <= web.RecentCount; i++ {
		b := store.Bookmark{
			Key: fmt.Sprintf("asura:new%d", i), Site: "asura",
			SeriesID: fmt.Sprintf("new%d", i), Title: fmt.Sprintf("Waiting%d", i),
			Status: store.StatusReading, LastChapterNum: 1, LatestChapter: "2",
			LatestChapterNum: floatPtr(2), UpdatedAt: time.Now().UnixMilli() + int64(i),
		}
		if _, err := st.Upsert(st.OwnerID(), b); err != nil {
			t.Fatalf("seed %s: %v", b.Key, err)
		}
	}
	if got := strings.Count(stripOf(t, srv, st, "all"), "recent-card"); got != web.RecentCount {
		t.Fatalf("strip rendered %d cards, want %d", got, web.RecentCount)
	}
}

func postStatus(t *testing.T, srv http.Handler, st *store.Store, key, status string) *httptest.ResponseRecorder {
	t.Helper()
	form := url.Values{"status": {status}}
	req := httptest.NewRequest(http.MethodPost, "/ui/bookmarks/"+key+"/status",
		strings.NewReader(form.Encode()))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	req.AddCookie(sessionCookie(t, st))
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, req)
	return rr
}

func TestUIStatusSetsBucket(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seedStatusRows(t, st)

	for _, want := range []string{store.StatusArchived, store.StatusFinished, store.StatusReading} {
		if rr := postStatus(t, srv, st, "asura:reading", want); rr.Code != http.StatusOK {
			t.Fatalf("set %s: status = %d, body %s", want, rr.Code, rr.Body.String())
		}
		b, ok, err := st.Get(st.OwnerID(), "asura:reading")
		if err != nil || !ok {
			t.Fatalf("Get: ok=%v err=%v", ok, err)
		}
		if b.Status != want {
			t.Fatalf("stored status = %q, want %q", b.Status, want)
		}
	}
}

func TestUIStatusRejectsUnknownValue(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seedStatusRows(t, st)

	if rr := postStatus(t, srv, st, "asura:reading", "dropped"); rr.Code != http.StatusBadRequest {
		t.Fatalf("status = %d, want 400", rr.Code)
	}
	b, _, _ := st.Get(st.OwnerID(), "asura:reading")
	if b.Status != store.StatusReading {
		t.Fatalf("stored status = %q, want it untouched", b.Status)
	}
}

func TestUIStatusRequiresSession(t *testing.T) {
	srv, st := newWebTestServer(t, webConfig())
	seedStatusRows(t, st)

	req := httptest.NewRequest(http.MethodPost, "/ui/bookmarks/asura:reading/status",
		strings.NewReader("status=archived"))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, req)

	if rr.Code != http.StatusUnauthorized {
		t.Fatalf("status = %d, want 401", rr.Code)
	}
}

func TestUIStatusDoesNotReorderList(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seedStatusRows(t, st)

	before, _, _ := st.Get(st.OwnerID(), "asura:reading")
	time.Sleep(2 * time.Millisecond)
	if rr := postStatus(t, srv, st, "asura:reading", store.StatusArchived); rr.Code != http.StatusOK {
		t.Fatalf("status = %d", rr.Code)
	}
	after, _, _ := st.Get(st.OwnerID(), "asura:reading")
	if after.UpdatedAt != before.UpdatedAt {
		t.Fatalf("UpdatedAt moved %d -> %d", before.UpdatedAt, after.UpdatedAt)
	}
}

func TestCardShowsStatusControls(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seedStatusRows(t, st)

	cases := []struct {
		tab            string
		want, dontWant []string
	}{
		// A series being read can be shelved or completed, not restored.
		{"all", []string{`hx-vals='{"status":"archived"}'`, `hx-vals='{"status":"finished"}'`}, nil},
		// An archived one can come back or be completed.
		{"archived", []string{`hx-vals='{"status":"reading"}'`, `hx-vals='{"status":"finished"}'`}, nil},
		// A finished one can only come back.
		{"finished", []string{`hx-vals='{"status":"reading"}'`}, []string{`hx-vals='{"status":"finished"}'`}},
	}
	for _, tc := range cases {
		t.Run(tc.tab, func(t *testing.T) {
			req := httptest.NewRequest(http.MethodGet, "/ui/list?tab="+tc.tab, nil)
			req.AddCookie(sessionCookie(t, st))
			rr := httptest.NewRecorder()
			srv.ServeHTTP(rr, req)

			body := rr.Body.String()
			for _, w := range tc.want {
				if !strings.Contains(body, w) {
					t.Fatalf("tab %s missing control %s", tc.tab, w)
				}
			}
			for _, d := range tc.dontWant {
				if strings.Contains(body, d) {
					t.Fatalf("tab %s offered %s", tc.tab, d)
				}
			}
		})
	}
}

func TestAppRendersNewTabs(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seedStatusRows(t, st)

	req := httptest.NewRequest(http.MethodGet, "/", nil)
	req.AddCookie(sessionCookie(t, st))
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, req)

	for _, want := range []string{`href="/?tab=archived"`, `href="/?tab=finished"`} {
		if !strings.Contains(rr.Body.String(), want) {
			t.Fatalf("app page missing %s", want)
		}
	}
}

// A mutation has to bring the chrome with it: the strip and the badge live
// outside the swapped card, so nothing else would correct them.
func TestMutationRefreshesChromeOutOfBand(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seed(t, st, store.Bookmark{
		Key: "asura:solo", Site: "asura", SeriesID: "solo", Title: "Solo Leveling",
		Status: store.StatusReading, LastChapterNum: 10, LatestChapter: "Chapter 11",
		LatestChapterNum: floatPtr(11), UpdatedAt: time.Now().UnixMilli(),
	})

	before := stripOf(t, srv, st, "all")
	if !strings.Contains(before, "Solo Leveling") || !strings.Contains(before, `id="new-count"`) {
		t.Fatalf("expected the series in the strip to start with: %q", before)
	}

	req := uiRequest(t, st, http.MethodPost, "/ui/bookmarks/asura:solo/status",
		url.Values{"status": {store.StatusArchived}})
	req.Header.Set("HX-Current-URL", "http://localhost/?tab=all")
	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, req)
	if rr.Code != http.StatusOK {
		t.Fatalf("status post = %d, want 200", rr.Code)
	}

	body := rr.Body.String()
	if !strings.Contains(body, `id="recent" hx-swap-oob="true" hidden`) {
		t.Fatalf("archiving did not empty the strip out of band: %q", body)
	}
	if !strings.Contains(body, `id="new-count" hx-swap-oob="true" hidden`) {
		t.Fatalf("archiving did not clear the Updated badge out of band: %q", body)
	}
}

// seedLibraries puts one manga and one novel row in the store.
func seedLibraries(t *testing.T, st *store.Store) {
	t.Helper()
	seed(t, st, store.Bookmark{
		Key: "asura:solo", Site: "asura", SeriesID: "solo",
		Title: "Solo Leveling", Kind: store.KindManga, UpdatedAt: 2_000_000,
	})
	seed(t, st, store.Bookmark{
		Key: "lightnovelworld:a-will-eternal", Site: "lightnovelworld",
		SeriesID: "a-will-eternal", Title: "A Will Eternal",
		Kind: store.KindNovel, UpdatedAt: 1_000_000,
	})
}

func TestLibrariesAreDisjoint(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seedLibraries(t, st)

	cases := []struct {
		name, path, want, absent string
	}{
		{"manga is the default", "/ui/list?tab=all", "Solo Leveling", "A Will Eternal"},
		{"novel is opt-in", "/ui/list?lib=novel&tab=all", "A Will Eternal", "Solo Leveling"},
		{"unknown lib falls back to manga", "/ui/list?lib=comics&tab=all", "Solo Leveling", "A Will Eternal"},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			rr := httptest.NewRecorder()
			srv.ServeHTTP(rr, uiRequest(t, st, http.MethodGet, tc.path, nil))
			if rr.Code != http.StatusOK {
				t.Fatalf("status = %d, want 200", rr.Code)
			}
			body := rr.Body.String()
			if !strings.Contains(body, tc.want) {
				t.Fatalf("%s missing from %s", tc.want, tc.path)
			}
			if strings.Contains(body, tc.absent) {
				t.Fatalf("%s leaked into %s", tc.absent, tc.path)
			}
		})
	}
}

// A row written before the kind column existed has none. It is manga.
func TestKindlessRowShowsInMangaLibrary(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seed(t, st, store.Bookmark{
		Key: "asura:legacy", Site: "asura", SeriesID: "legacy",
		Title: "Legacy Series", UpdatedAt: 1_000_000,
	})

	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, uiRequest(t, st, http.MethodGet, "/ui/list?tab=all", nil))
	if !strings.Contains(rr.Body.String(), "Legacy Series") {
		t.Fatal("a row with no kind must appear in the manga library")
	}
}

func TestNovelPageOmitsUpdatedTab(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seedLibraries(t, st)

	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, uiRequest(t, st, http.MethodGet, "/?lib=novel&tab=all", nil))
	if rr.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200", rr.Code)
	}
	body := rr.Body.String()
	if strings.Contains(body, "tab=new") {
		t.Fatal("novel page must not offer the Updated tab")
	}
	// html/template escapes & to &amp; inside an attribute value, so that — not
	// the raw URL — is what lands in the body. htmx and the browser both decode
	// it on read, so only the assertion has to know.
	for _, want := range []string{
		"/?lib=novel&amp;tab=fav",
		"/?lib=novel&amp;tab=archived",
		"/?lib=novel&amp;tab=finished",
	} {
		if !strings.Contains(body, want) {
			t.Fatalf("novel page missing tab link %s", want)
		}
	}
	if !strings.Contains(body, `class="libswitch"`) {
		t.Fatal("novel page missing the library switch")
	}
}

func TestMangaPageKeepsUpdatedTab(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seedLibraries(t, st)

	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, uiRequest(t, st, http.MethodGet, "/?tab=all", nil))
	body := rr.Body.String()
	if !strings.Contains(body, "/?tab=new") {
		t.Fatal("manga page must keep the Updated tab")
	}
	if strings.Contains(body, "lib=novel&amp;tab=new") {
		t.Fatal("the Updated tab must never be emitted for the novel library")
	}
}

// tab=new is not offered for novels, so a hand-typed one must land on All
// rather than an empty page.
func TestNovelNewTabFallsBackToAll(t *testing.T) {
	cfg := webConfig()
	srv, st := newWebTestServer(t, cfg)
	seedLibraries(t, st)

	rr := httptest.NewRecorder()
	srv.ServeHTTP(rr, uiRequest(t, st, http.MethodGet, "/ui/list?lib=novel&tab=new", nil))
	if rr.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200", rr.Code)
	}
	if !strings.Contains(rr.Body.String(), "A Will Eternal") {
		t.Fatal("novel tab=new should render the novel All list")
	}
}