package web

import (
	"archive/zip"
	"bytes"
	"encoding/base64"
	"encoding/json"
	"fmt"
	"net/http"
	"net/http/httptest"
	"net/url"
	"os"
	"path/filepath"
	"strings"
	"sync"
	"testing"
	"time"

	"git.veillax.com/Veillax/mako/internal/config"
	"git.veillax.com/Veillax/mako/internal/oidc"
)

// idp is a stand-in for Authentik: it publishes its metadata and trades the code "good" for an ID
// token carrying whatever claims the test set.
type idp struct {
	srv       *httptest.Server
	mu        sync.Mutex
	nonce     string
	challenge string
	claims    map[string]any
	down      bool
}

func newIdP(t *testing.T) *idp {
	p := &idp{}
	mux := http.NewServeMux()
	mux.HandleFunc("/app/.well-known/openid-configuration", func(w http.ResponseWriter, r *http.Request) {
		json.NewEncoder(w).Encode(map[string]string{"issuer": p.srv.URL + "/app/", "authorization_endpoint": p.srv.URL + "/authorize", "token_endpoint": p.srv.URL + "/token"})
	})
	mux.HandleFunc("/token", func(w http.ResponseWriter, r *http.Request) {
		p.mu.Lock()
		defer p.mu.Unlock()
		r.ParseForm()
		if p.down {
			http.Error(w, "boom", http.StatusBadGateway)
			return
		}
		if r.Form.Get("code") != "good" || r.Form.Get("client_secret") != "shh" || r.Form.Get("grant_type") != "authorization_code" ||
			oidc.Challenge(r.Form.Get("code_verifier")) != p.challenge || r.Form.Get("redirect_uri") != "http://127.0.0.1:8490/auth/callback" {
			w.WriteHeader(http.StatusBadRequest)
			json.NewEncoder(w).Encode(map[string]string{"error": "invalid_grant"})
			return
		}
		c := map[string]any{"iss": p.srv.URL + "/app/", "aud": "mako-client", "exp": time.Now().Add(time.Hour).Unix(), "nonce": p.nonce}
		for k, v := range p.claims {
			c[k] = v
		}
		raw, _ := json.Marshal(c)
		enc := base64.RawURLEncoding.EncodeToString
		json.NewEncoder(w).Encode(map[string]string{"id_token": enc([]byte(`{"alg":"none"}`)) + "." + enc(raw) + ".sig", "access_token": "x"})
	})
	p.srv = httptest.NewServer(mux)
	t.Cleanup(p.srv.Close)
	return p
}

type env struct {
	t   *testing.T
	s   *Server
	h   http.Handler
	idp *idp
	dir string
	cfg config.Config
}

func setup(t *testing.T, tweak func(map[string]any)) *env {
	t.Helper()
	p := newIdP(t)
	dir := t.TempDir()
	conf := map[string]any{
		"data_dir": filepath.Join(dir, "data"), "public_url": "http://127.0.0.1:8490", "secret": "test-secret",
		"oidc": map[string]string{"issuer": p.srv.URL + "/app/", "client_id": "mako-client", "client_secret": "shh"},
	}
	if tweak != nil {
		tweak(conf)
	}
	b, _ := json.Marshal(conf)
	path := filepath.Join(dir, "mako.json")
	os.WriteFile(path, b, 0o600)
	h, err := config.Load(path)
	if err != nil {
		t.Fatal(err)
	}
	s, err := New(h, "test")
	if err != nil {
		t.Fatal(err)
	}
	return &env{t: t, s: s, h: s.Handler(), idp: p, dir: dir, cfg: h.Get()}
}

func (e *env) do(method, path string, body any, cookies []*http.Cookie, hdr ...string) *httptest.ResponseRecorder {
	e.t.Helper()
	var rd *bytes.Reader
	if body != nil {
		b, _ := json.Marshal(body)
		rd = bytes.NewReader(b)
	} else {
		rd = bytes.NewReader(nil)
	}
	r := httptest.NewRequest(method, path, rd)
	if body != nil {
		r.Header.Set("Content-Type", "application/json")
	}
	if method != http.MethodGet {
		r.Header.Set("X-Mako", "1")
	}
	for i := 0; i+1 < len(hdr); i += 2 {
		if hdr[i+1] == "" {
			r.Header.Del(hdr[i])
		} else {
			r.Header.Set(hdr[i], hdr[i+1])
		}
	}
	for _, c := range cookies {
		r.AddCookie(c)
	}
	w := httptest.NewRecorder()
	e.h.ServeHTTP(w, r)
	return w
}

func cookieNamed(w *httptest.ResponseRecorder, name string) *http.Cookie {
	for _, c := range w.Result().Cookies() {
		if c.Name == name {
			return c
		}
	}
	return nil
}

func jsonOf(t *testing.T, w *httptest.ResponseRecorder, v any) {
	t.Helper()
	if err := json.Unmarshal(w.Body.Bytes(), v); err != nil {
		t.Fatalf("bad json %q: %v", w.Body.String(), err)
	}
}

// begin starts a sign-in and returns the redirect the browser would follow and the flow cookie.
func (e *env) begin(next string) (*url.URL, *http.Cookie) {
	e.t.Helper()
	w := e.do("GET", "/auth/login?next="+url.QueryEscape(next), nil, nil)
	if w.Code != http.StatusSeeOther {
		e.t.Fatalf("login: %d %s", w.Code, w.Body)
	}
	to, _ := url.Parse(w.Header().Get("Location"))
	return to, cookieNamed(w, flowCookie)
}

// signIn runs the whole flow for a person and returns their session cookie.
func (e *env) signIn(claims map[string]any) []*http.Cookie {
	e.t.Helper()
	to, flow := e.begin("")
	e.idp.mu.Lock()
	e.idp.nonce, e.idp.challenge, e.idp.claims = to.Query().Get("nonce"), to.Query().Get("code_challenge"), claims
	e.idp.mu.Unlock()
	w := e.do("GET", "/auth/callback?code=good&state="+url.QueryEscape(to.Query().Get("state")), nil, []*http.Cookie{flow})
	ck := cookieNamed(w, sessionCookie)
	if w.Code != http.StatusSeeOther || ck == nil {
		e.t.Fatalf("callback: %d %s -> %s", w.Code, w.Body, w.Header().Get("Location"))
	}
	return []*http.Cookie{ck}
}

var alice = map[string]any{"sub": "alice-sub", "email": "alice@example.com", "name": "Alice", "preferred_username": "alice"}
var bob = map[string]any{"sub": "bob-sub", "email": "bob@example.com", "name": "Bob", "preferred_username": "bob"}

func TestNothingWorksWithoutSigningIn(t *testing.T) {
	e := setup(t, nil)
	for _, path := range []string{"/api/me", "/api/pages", "/api/notes", "/api/notes/abc", "/api/find?q=x", "/api/export"} {
		if w := e.do("GET", path, nil, nil); w.Code != http.StatusUnauthorized {
			t.Errorf("GET %s without a session: %d", path, w.Code)
		}
	}
	if w := e.do("POST", "/api/notes", map[string]string{"body": "x"}, nil); w.Code != http.StatusUnauthorized {
		t.Errorf("POST without a session: %d", w.Code)
	}
	if w := e.do("GET", "/", nil, nil); w.Code != http.StatusOK || !strings.Contains(w.Body.String(), "Mako") {
		t.Errorf("the sign-in page itself must load: %d", w.Code)
	}
	if w := e.do("GET", "/healthz", nil, nil); w.Code != http.StatusOK {
		t.Errorf("healthz: %d", w.Code)
	}
	if w := e.do("GET", "/api/me", nil, []*http.Cookie{{Name: sessionCookie, Value: "garbage"}}); w.Code != http.StatusUnauthorized {
		t.Errorf("garbage cookie: %d", w.Code)
	}
}

func TestSignInFlow(t *testing.T) {
	e := setup(t, nil)
	to, flow := e.begin("#/p/abc-123")
	q := to.Query()
	if !strings.HasPrefix(to.String(), e.idp.srv.URL+"/authorize?") {
		t.Fatalf("goes to Authentik: %s", to)
	}
	for k, want := range map[string]string{"response_type": "code", "client_id": "mako-client", "redirect_uri": "http://127.0.0.1:8490/auth/callback",
		"scope": "openid profile email", "code_challenge_method": "S256"} {
		if q.Get(k) != want {
			t.Errorf("%s = %q, want %q", k, q.Get(k), want)
		}
	}
	for _, k := range []string{"state", "nonce", "code_challenge"} {
		if len(q.Get(k)) < 16 {
			t.Errorf("%s is too short: %q", k, q.Get(k))
		}
	}
	if !flow.HttpOnly || flow.SameSite != http.SameSiteLaxMode || flow.Path != "/auth/" {
		t.Errorf("flow cookie: %+v", flow)
	}

	e.idp.nonce, e.idp.challenge, e.idp.claims = q.Get("nonce"), q.Get("code_challenge"), alice
	w := e.do("GET", "/auth/callback?code=good&state="+url.QueryEscape(q.Get("state")), nil, []*http.Cookie{flow})
	if w.Code != http.StatusSeeOther || w.Header().Get("Location") != "/#/p/abc-123" {
		t.Fatalf("callback: %d -> %s", w.Code, w.Header().Get("Location"))
	}
	ses := cookieNamed(w, sessionCookie)
	if ses == nil || !ses.HttpOnly || ses.SameSite != http.SameSiteLaxMode || ses.Secure {
		t.Fatalf("session cookie: %+v", ses)
	}
	if c := cookieNamed(w, flowCookie); c == nil || c.MaxAge >= 0 {
		t.Error("the flow cookie should be cleared after use")
	}
	var me struct{ Name, Email string }
	jsonOf(t, e.do("GET", "/api/me", nil, []*http.Cookie{ses}), &me)
	if me.Name != "Alice" || me.Email != "alice@example.com" {
		t.Fatalf("me: %+v", me)
	}

	// the same flow cookie cannot be used twice by a browser that kept it, and a stale state is refused
	if w := e.do("GET", "/auth/callback?code=good&state=wrong", nil, []*http.Cookie{flow}); w.Header().Get("Location") != "/?signin=failed" {
		t.Errorf("wrong state: %s", w.Header().Get("Location"))
	}
}

func TestSignInIsRefusedWhenAnythingIsOff(t *testing.T) {
	e := setup(t, nil)
	try := func(name string, mutate func(to *url.URL, flow **http.Cookie) string, want string) {
		t.Helper()
		to, flow := e.begin("")
		e.idp.mu.Lock()
		e.idp.nonce, e.idp.challenge, e.idp.claims, e.idp.down = to.Query().Get("nonce"), to.Query().Get("code_challenge"), alice, false
		e.idp.mu.Unlock()
		target := mutate(to, &flow)
		var cks []*http.Cookie
		if flow != nil {
			cks = append(cks, flow)
		}
		w := e.do("GET", target, nil, cks)
		if got := w.Header().Get("Location"); got != "/?signin="+want || cookieNamed(w, sessionCookie) != nil {
			t.Errorf("%s: went to %q (%d), session %v; want %s", name, got, w.Code, cookieNamed(w, sessionCookie), want)
		}
	}
	good := func(to *url.URL) string {
		return "/auth/callback?code=good&state=" + url.QueryEscape(to.Query().Get("state"))
	}

	try("no flow cookie", func(to *url.URL, f **http.Cookie) string { *f = nil; return good(to) }, "expired")
	try("tampered flow cookie", func(to *url.URL, f **http.Cookie) string { c := *f; c.Value = "x" + c.Value; return good(to) }, "expired")
	try("wrong state", func(to *url.URL, f **http.Cookie) string { return "/auth/callback?code=good&state=nope" }, "failed")
	try("no code", func(to *url.URL, f **http.Cookie) string { return "/auth/callback?state=" + to.Query().Get("state") }, "failed")
	try("denied at Authentik", func(to *url.URL, f **http.Cookie) string {
		return "/auth/callback?error=access_denied&state=" + to.Query().Get("state")
	}, "denied")
	try("bad code", func(to *url.URL, f **http.Cookie) string {
		return "/auth/callback?code=stolen&state=" + url.QueryEscape(to.Query().Get("state"))
	}, "failed")
	try("wrong nonce", func(to *url.URL, f **http.Cookie) string {
		e.idp.mu.Lock()
		e.idp.nonce = "other"
		e.idp.mu.Unlock()
		return good(to)
	}, "failed")
	try("wrong audience", func(to *url.URL, f **http.Cookie) string {
		e.idp.mu.Lock()
		e.idp.claims = map[string]any{"sub": "x", "aud": "someone-else"}
		e.idp.mu.Unlock()
		return good(to)
	}, "failed")
	try("expired token", func(to *url.URL, f **http.Cookie) string {
		e.idp.mu.Lock()
		e.idp.claims = map[string]any{"sub": "x", "exp": time.Now().Add(-time.Hour).Unix()}
		e.idp.mu.Unlock()
		return good(to)
	}, "failed")
	try("wrong issuer", func(to *url.URL, f **http.Cookie) string {
		e.idp.mu.Lock()
		e.idp.claims = map[string]any{"sub": "x", "iss": "https://evil.example.com/"}
		e.idp.mu.Unlock()
		return good(to)
	}, "failed")
	try("no subject", func(to *url.URL, f **http.Cookie) string {
		e.idp.mu.Lock()
		e.idp.claims = map[string]any{"sub": ""}
		e.idp.mu.Unlock()
		return good(to)
	}, "failed")
	try("Authentik is down", func(to *url.URL, f **http.Cookie) string {
		e.idp.mu.Lock()
		e.idp.down = true
		e.idp.mu.Unlock()
		return good(to)
	}, "unavailable")

	// and a next address that points anywhere but inside Mako is dropped
	for _, bad := range []string{"https://evil.example.com", "//evil.example.com", "/api/export", "#/<script>", "javascript:alert(1)"} {
		to, flow := e.begin(bad)
		e.idp.mu.Lock()
		e.idp.down = false
		e.idp.nonce, e.idp.challenge, e.idp.claims = to.Query().Get("nonce"), to.Query().Get("code_challenge"), alice
		e.idp.mu.Unlock()
		w := e.do("GET", "/auth/callback?code=good&state="+url.QueryEscape(to.Query().Get("state")), nil, []*http.Cookie{flow})
		if w.Header().Get("Location") != "/" {
			t.Errorf("next %q led to %q", bad, w.Header().Get("Location"))
		}
	}
}

func TestSignInWhenAuthentikIsUnreachable(t *testing.T) {
	e := setup(t, nil)
	e.idp.srv.Close()
	w := e.do("GET", "/auth/login", nil, nil)
	if w.Header().Get("Location") != "/?signin=unavailable" {
		t.Fatalf("went to %q", w.Header().Get("Location"))
	}
}

func TestAllowedList(t *testing.T) {
	e := setup(t, func(c map[string]any) { c["allowed"] = []string{"ALICE@example.com", "carol"} })
	to, flow := e.begin("")
	e.idp.nonce, e.idp.challenge, e.idp.claims = to.Query().Get("nonce"), to.Query().Get("code_challenge"), bob
	w := e.do("GET", "/auth/callback?code=good&state="+url.QueryEscape(to.Query().Get("state")), nil, []*http.Cookie{flow})
	if w.Header().Get("Location") != "/?signin=denied" || cookieNamed(w, sessionCookie) != nil {
		t.Fatalf("Bob should be turned away: %s", w.Header().Get("Location"))
	}
	ses := e.signIn(alice) // matched by email, whatever the case
	if w := e.do("GET", "/api/me", nil, ses); w.Code != 200 {
		t.Fatalf("Alice: %d", w.Code)
	}
	if c := e.signIn(map[string]any{"sub": "carol-sub", "preferred_username": "Carol"}); c == nil { // matched by username
		t.Fatal("Carol should get in")
	}
	// taking someone off the list ends their session at once
	e2 := setup(t, func(c map[string]any) { c["allowed"] = []string{"someone-else"} })
	old := seal(e2.cfg, "session", sessionData{Sub: "alice-sub", Email: "alice@example.com", Exp: time.Now().Add(time.Hour).Unix()})
	if w := e2.do("GET", "/api/me", nil, []*http.Cookie{{Name: sessionCookie, Value: old}}); w.Code != http.StatusUnauthorized {
		t.Fatalf("a valid cookie for someone no longer allowed: %d", w.Code)
	}
}

func TestSessionsAreSignedAndExpire(t *testing.T) {
	e := setup(t, nil)
	ses := e.signIn(alice)
	if w := e.do("GET", "/api/me", nil, ses); w.Code != 200 {
		t.Fatal("valid session refused")
	}
	payload, sig, _ := strings.Cut(ses[0].Value, ".")
	forged := base64.RawURLEncoding.EncodeToString([]byte(`{"s":"mallory","n":"Mallory","x":99999999999}`))
	for name, v := range map[string]string{"forged payload": forged + "." + sig, "no signature": payload, "empty": ""} {
		if w := e.do("GET", "/api/me", nil, []*http.Cookie{{Name: sessionCookie, Value: v}}); w.Code != http.StatusUnauthorized {
			t.Errorf("%s accepted: %d", name, w.Code)
		}
	}
	expired := seal(e.cfg, "session", sessionData{Sub: "alice-sub", Exp: time.Now().Add(-time.Minute).Unix()})
	if w := e.do("GET", "/api/me", nil, []*http.Cookie{{Name: sessionCookie, Value: expired}}); w.Code != http.StatusUnauthorized {
		t.Errorf("expired session accepted: %d", w.Code)
	}
	// a cookie for another purpose, or signed with another secret, is not a session
	other := e.cfg
	other.Secret = "different"
	for name, v := range map[string]string{
		"flow cookie as session": seal(e.cfg, "flow", sessionData{Sub: "x", Exp: time.Now().Add(time.Hour).Unix()}),
		"other secret":           seal(other, "session", sessionData{Sub: "x", Exp: time.Now().Add(time.Hour).Unix()}),
	} {
		if w := e.do("GET", "/api/me", nil, []*http.Cookie{{Name: sessionCookie, Value: v}}); w.Code != http.StatusUnauthorized {
			t.Errorf("%s accepted: %d", name, w.Code)
		}
	}
	w := e.do("POST", "/api/logout", nil, ses)
	if c := cookieNamed(w, sessionCookie); w.Code != 200 || c == nil || c.MaxAge >= 0 {
		t.Fatalf("logout: %d %+v", w.Code, c)
	}
}

func TestWritesNeedTheHeader(t *testing.T) {
	e := setup(t, nil)
	ses := e.signIn(alice)
	if w := e.do("POST", "/api/notes", map[string]string{"body": "x"}, ses, "X-Mako", ""); w.Code != http.StatusForbidden {
		t.Fatalf("a write without the header: %d", w.Code)
	}
	if w := e.do("DELETE", "/api/trash", nil, ses, "X-Mako", ""); w.Code != http.StatusForbidden {
		t.Fatalf("a delete without the header: %d", w.Code)
	}
}

func TestEachPersonHasTheirOwnNotebook(t *testing.T) {
	e := setup(t, nil)
	a, b := e.signIn(alice), e.signIn(bob)
	var mine struct{ ID string }
	jsonOf(t, e.do("POST", "/api/notes", map[string]string{"title": "Alice's secret", "body": "dear diary"}, a), &mine)
	if mine.ID == "" {
		t.Fatal("no note made")
	}
	if w := e.do("GET", "/api/notes/"+mine.ID, nil, b); w.Code != http.StatusNotFound {
		t.Fatalf("Bob can see Alice's page: %d", w.Code)
	}
	var list struct{ Notes []struct{ ID string } }
	jsonOf(t, e.do("GET", "/api/notes", nil, b), &list)
	if len(list.Notes) != 0 {
		t.Fatalf("Bob's list: %+v", list)
	}
	var found struct{ Hits []struct{ ID string } }
	jsonOf(t, e.do("GET", "/api/find?q=diary", nil, b), &found)
	if len(found.Hits) != 0 {
		t.Fatalf("Bob can search Alice's notes: %+v", found)
	}
	if w := e.do("PUT", "/api/notes/"+mine.ID, map[string]string{"body": "hacked"}, b); w.Code != http.StatusNotFound {
		t.Fatalf("Bob can edit Alice's page: %d", w.Code)
	}
	// on disk each has a folder named from a hash, never from anything they chose
	entries, _ := os.ReadDir(filepath.Join(e.dir, "data", "users"))
	if len(entries) != 2 {
		t.Fatalf("expected two notebooks, got %d", len(entries))
	}
	for _, d := range entries {
		if strings.Contains(d.Name(), "alice") || strings.Contains(d.Name(), "bob") || len(d.Name()) != 32 {
			t.Errorf("folder name %q", d.Name())
		}
	}
}

func TestPageLifecycle(t *testing.T) {
	e := setup(t, nil)
	ses := e.signIn(alice)
	type pg struct {
		ID, Title, Name, Parent, Body, Updated string
		Backlinks                              []struct{ ID, Name string }
		Error, Code                            string
		Note                                   struct{ Body string }
	}
	call := func(method, path string, body any) (pg, int) {
		w := e.do(method, path, body, ses)
		var p pg
		json.Unmarshal(w.Body.Bytes(), &p)
		return p, w.Code
	}

	plans, code := call("POST", "/api/notes", map[string]string{"title": "Plans", "body": "first"})
	if code != 201 || plans.Name != "Plans" {
		t.Fatalf("create: %d %+v", code, plans)
	}
	if _, code := call("POST", "/api/notes", map[string]string{"title": "plans"}); code != 422 {
		t.Fatalf("duplicate title on create: %d", code)
	}
	trip, _ := call("POST", "/api/notes", map[string]string{"title": "Trip", "body": "see [[Plans]]", "parent": plans.ID})
	if trip.Parent != plans.ID {
		t.Fatalf("subpage: %+v", trip)
	}
	if _, code := call("POST", "/api/notes", map[string]string{}); code != 400 {
		t.Fatalf("empty create: %d", code)
	}

	got, _ := call("GET", "/api/notes/"+plans.ID, nil)
	if len(got.Backlinks) != 1 || got.Backlinks[0].Name != "Trip" {
		t.Fatalf("backlinks: %+v", got.Backlinks)
	}

	upd, code := call("PUT", "/api/notes/"+plans.ID, map[string]any{"body": "second", "base": plans.Updated})
	if code != 200 || upd.Body != "second" {
		t.Fatalf("update: %d %+v", code, upd)
	}
	stale, code := call("PUT", "/api/notes/"+plans.ID, map[string]any{"body": "third", "base": plans.Updated})
	if code != 409 || stale.Note.Body != "second" {
		t.Fatalf("stale update: %d %+v", code, stale)
	}
	bad, code := call("PUT", "/api/notes/"+trip.ID, map[string]any{"title": "PLANS"})
	if code != 422 || bad.Code != "title_taken" || !strings.HasPrefix(bad.Error, "Another") {
		t.Fatalf("taken title: %d %+v", code, bad)
	}
	if _, code := call("PUT", "/api/notes/"+plans.ID, map[string]any{"title": "Plans 2027"}); code != 200 {
		t.Fatalf("rename: %d", code)
	}
	if moved, _ := call("GET", "/api/notes/"+trip.ID, nil); moved.Body != "see [[Plans 2027]]" {
		t.Fatalf("links follow a rename: %q", moved.Body)
	}
	if _, code := call("PUT", "/api/notes/"+plans.ID, map[string]any{"parent": trip.ID}); code != 400 {
		t.Fatalf("a page inside its own child: %d", code)
	}

	var found struct{ Hits []struct{ ID, Name string } }
	jsonOf(t, e.do("GET", "/api/find?q=2027", nil, ses), &found)
	if len(found.Hits) != 2 || found.Hits[0].ID != plans.ID { // Trip mentions it in a link, but the title match leads
		t.Fatalf("find: %+v", found)
	}
	var tree struct {
		Pages  []struct{ ID, Parent string }
		Counts struct{ All, Trash int }
	}
	jsonOf(t, e.do("GET", "/api/pages", nil, ses), &tree)
	if len(tree.Pages) != 2 || tree.Counts.All != 2 {
		t.Fatalf("pages: %+v", tree)
	}

	if _, code := call("DELETE", "/api/notes/"+plans.ID, nil); code != 200 {
		t.Fatalf("trash: %d", code)
	}
	if kid, _ := call("GET", "/api/notes/"+trip.ID, nil); kid.Parent != "" {
		t.Fatalf("subpages move up when their page is trashed: %+v", kid)
	}
	if _, code := call("DELETE", "/api/notes/"+trip.ID+"?purge=1", nil); code != 400 {
		t.Fatalf("purging a live page: %d", code)
	}
	if _, code := call("POST", "/api/notes/"+plans.ID+"/restore", nil); code != 200 {
		t.Fatalf("restore: %d", code)
	}
	if _, code := call("GET", "/api/notes/..%2f..%2fetc%2fpasswd", nil); code != 404 {
		t.Fatalf("path tricks: %d", code)
	}

	d, code := call("POST", "/api/daily", map[string]string{"date": "2026-10-31"})
	if code != 200 || d.Title != "2026-10-31" {
		t.Fatalf("daily: %d %+v", code, d)
	}
	if _, code := call("POST", "/api/daily", map[string]string{"date": "nope"}); code != 400 {
		t.Fatalf("bad date: %d", code)
	}

	w := e.do("GET", "/api/export", nil, ses)
	zr, err := zip.NewReader(bytes.NewReader(w.Body.Bytes()), int64(w.Body.Len()))
	if err != nil || w.Header().Get("Content-Type") != "application/zip" {
		t.Fatalf("export: %v %s", err, w.Header().Get("Content-Type"))
	}
	var names []string
	for _, f := range zr.File {
		names = append(names, f.Name)
	}
	if fmt.Sprint(names) != "[mako/Journal/2026-10-31.md mako/Plans 2027.md mako/Trip.md]" && len(names) != 3 {
		t.Fatalf("export has %v", names)
	}
}

func TestSecurityHeaders(t *testing.T) {
	e := setup(t, nil)
	w := e.do("GET", "/", nil, nil)
	csp := w.Header().Get("Content-Security-Policy")
	for _, want := range []string{"default-src 'none'", "script-src 'self'", "style-src 'self'", "frame-ancestors 'none'"} {
		if !strings.Contains(csp, want) {
			t.Errorf("CSP lacks %q: %s", want, csp)
		}
	}
	if w.Header().Get("X-Frame-Options") != "DENY" || w.Header().Get("X-Content-Type-Options") != "nosniff" {
		t.Error("framing and sniffing headers missing")
	}
	if w.Header().Get("Strict-Transport-Security") != "" {
		t.Error("no HSTS over plain http")
	}
	if got := e.do("GET", "/api/me", nil, nil).Header().Get("Cache-Control"); got != "no-store" {
		t.Errorf("API responses must not be cached: %q", got)
	}
	s := setup(t, func(c map[string]any) { c["public_url"] = "https://notes.example.com/" })
	if s.do("GET", "/", nil, nil).Header().Get("Strict-Transport-Security") == "" {
		t.Error("HSTS expected behind https")
	}
	if !s.cfg.Secure() || s.cfg.PublicURL != "https://notes.example.com" {
		t.Errorf("public url: %+v", s.cfg)
	}
}

func TestServerWillNotStartHalfConfigured(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "mako.json")
	os.WriteFile(path, []byte(`{"public_url":"https://notes.example.com"}`), 0o600)
	h, _ := config.Load(path)
	_, err := New(h, "t")
	if err == nil {
		t.Fatal("started without Authentik settings")
	}
	for _, want := range []string{"oidc.issuer", "MAKO_OIDC_CLIENT_ID", "client_secret", "/auth/callback"} {
		if !strings.Contains(err.Error(), want) {
			t.Errorf("the message should mention %q:\n%v", want, err)
		}
	}
	os.WriteFile(path, []byte(`{"public_url":"http://notes.example.com","oidc":{"issuer":"https://a.example.com/","client_id":"x","client_secret":"y"}}`), 0o600)
	h, _ = config.Load(path)
	if _, err := New(h, "t"); err == nil || !strings.Contains(err.Error(), "https") {
		t.Errorf("plain http on a real host should be refused: %v", err)
	}
	t.Setenv("MAKO_PUBLIC_URL", "https://notes.example.com")
	h, _ = config.Load(path)
	if _, err := New(h, "t"); err != nil {
		t.Errorf("environment settings should override the file: %v", err)
	}
	if b, _ := os.ReadFile(path); strings.Contains(string(b), "notes.example.com\"") && strings.Contains(string(b), "https://notes.example.com") {
		t.Error("environment values must never be written to the file")
	}
}

func TestFailCapitalizes(t *testing.T) {
	w := httptest.NewRecorder()
	fail(w, 400, "éclair is ready")
	var out map[string]string
	json.Unmarshal(w.Body.Bytes(), &out)
	if out["error"] != "Éclair is ready" {
		t.Fatalf("%q", out["error"])
	}
}