package api

import (
	"bytes"
	"crypto/tls"
	"encoding/json"
	"fmt"
	"io"
	"math/rand"
	"net"
	"net/http"
	"net/http/httptest"
	"os"
	"strconv"
	"strings"
	"testing"
	"time"

	"github.com/go-pkgz/auth/v2"
	"github.com/go-pkgz/auth/v2/avatar"
	"github.com/go-pkgz/auth/v2/provider"
	"github.com/go-pkgz/auth/v2/token"
	cache "github.com/go-pkgz/lcw/v2"
	R "github.com/go-pkgz/rest"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	bolt "go.etcd.io/bbolt"
	"go.uber.org/goleak"

	"github.com/umputun/remark42/backend/app/migrator"
	"github.com/umputun/remark42/backend/app/notify"
	"github.com/umputun/remark42/backend/app/rest"
	"github.com/umputun/remark42/backend/app/rest/proxy"
	"github.com/umputun/remark42/backend/app/store"
	adminstore "github.com/umputun/remark42/backend/app/store/admin"
	"github.com/umputun/remark42/backend/app/store/engine"
	"github.com/umputun/remark42/backend/app/store/image"
	"github.com/umputun/remark42/backend/app/store/service"
)

// To generate a token, enter one of the tokens here into https://jwt.io, change the secret to one you're using in your test
// ("secret" in case of startupT), and alter the fields you want to be changed.

var devToken = `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJyZW1hcms0MiIsImV4cCI6Mzc4OTE5MTgyMiwianRpIjoicmFuZG9tIGlkIiwiaXNzIjoicmVtYXJrNDIiLCJuYmYiOjE1MjE4ODQyMjIsInVzZXIiOnsibmFtZSI6ImRldmVsb3BlciBvbmUiLCJpZCI6InByb3ZpZGVyMV9kZXYiLCJwaWN0dXJlIjoiaHR0cDovL2V4YW1wbGUuY29tL3BpYy5wbmciLCJpcCI6IjEyNy4wLjAuMSIsImVtYWlsIjoibWVAZXhhbXBsZS5jb20ifX0.dirTS_ahSF6375sdO2iodm2K2UmRTzQNQMFiHuTQCVs`

var dev2Token = `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJyZW1hcms0MiIsImV4cCI6Mzc4OTE5MTgyMiwianRpIjoicmFuZG9tIGlkIiwiaXNzIjoicmVtYXJrNDIiLCJuYmYiOjE1MjE4ODQyMjIsInVzZXIiOnsibmFtZSI6ImRldmVsb3BlciBvbmUiLCJpZCI6InByb3ZpZGVyMV9kZXYyIiwicGljdHVyZSI6Imh0dHA6Ly9leGFtcGxlLmNvbS9waWMucG5nIiwiaXAiOiIxMjcuMC4wLjEiLCJlbWFpbCI6Im1lQGV4YW1wbGUuY29tIn19.qsR_PupfjIq7uw0eAuyGV8nsUoMx9v541c9olnRInRQ`

var anonToken = `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJyZW1hcms0MiIsImV4cCI6Mzc4OTE5MTgyMiwianRpIjoicmFuZG9tIGlkIiwiaXNzIjoicmVtYXJrNDIiLCJuYmYiOjE1MjE4ODQyMjIsInVzZXIiOnsibmFtZSI6ImFub255bW91cyB0ZXN0IHVzZXIiLCJpZCI6ImFub255bW91c190ZXN0X3VzZXIiLCJwaWN0dXJlIjoiaHR0cDovL2V4YW1wbGUuY29tL3BpYy5wbmciLCJpcCI6IjEyNy4wLjAuMSIsImVtYWlsIjoiYW5vbkBleGFtcGxlLmNvbSJ9fQ.gAae2WMxZNZE5ebVboptPEyQ7Nk6EQxciNnGJ_mPOuU`

var emailUserToken = `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJyZW1hcms0MiIsImV4cCI6Mzc4OTE5MTgyMiwianRpIjoicmFuZG9tIGlkIiwiaXNzIjoicmVtYXJrNDIiLCJuYmYiOjE1MjE4ODQyMjIsInVzZXIiOnsibmFtZSI6Imdvb2RAZXhhbXBsZS5jb20gdGVzdCB1c2VyIiwiaWQiOiJlbWFpbF9mNWRmZTlkMmU2YmQ3NWZjNzRlYTVmYWJmMjczYjQ1YjViYWViMTk1IiwicGljdHVyZSI6Imh0dHA6Ly9leGFtcGxlLmNvbS9waWMucG5nIiwiaXAiOiIxMjcuMC4wLjEiLCJlbWFpbCI6Imdvb2RAZXhhbXBsZS5jb20ifX0.vH2HN1JpuXL8okTJq1A-zGHQ-l2ILcwxvDDEmu2zwks`

var devTokenBadAud = `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJyZW1hcms0Ml9iYWQiLCJleHAiOjM3ODkxOTE4MjIsImp0aSI6InJhbmRvbSBpZCIsImlzcyI6InJlbWFyazQyIiwibmJmIjoxNTIxODg0MjIyLCJ1c2VyIjp7Im5hbWUiOiJkZXZlbG9wZXIgb25lIiwiaWQiOiJwcm92aWRlcjFfZGV2IiwicGljdHVyZSI6Imh0dHA6Ly9leGFtcGxlLmNvbS9waWMucG5nIiwiaXAiOiIxMjcuMC4wLjEiLCJlbWFpbCI6Im1lQGV4YW1wbGUuY29tIn19.X-lvnHvBz6VfEbVV4f-bjcZuLY5pYtvEansk_TQMrX8`

var adminUmputunToken = `eyJhbGciOiJIUzI1NiJ9.eyJhdWQiOiJyZW1hcms0MiIsImV4cCI6MTk1NDU5Nzk4MCwianRpIjoiOTdhMmUwYWM0ZGM3ZDVmNjkyNmQ1ZTg2MjBhY2VmOWE0MGMwIiwiaWF0IjoxNDU0NTk3NjgwLCJpc3MiOiJyZW1hcms0MiIsInVzZXIiOnsibmFtZSI6IlVtcHV0dW4iLCJpZCI6ImdpdGh1Yl9lZjBmNzA2YTciLCJwaWN0dXJlIjoiaHR0cHM6Ly9yZW1hcms0Mi5yYWRpby10LmNvbS9hcGkvdjEvYXZhdGFyL2NiNDJmZjQ5M2FkZTY5NmQ4OGEzYTU5MGYxMzZhZTllMzRkZTdjMWIuaW1hZ2UiLCJhdHRycyI6eyJhZG1pbiI6dHJ1ZSwiYmxvY2tlZCI6ZmFsc2V9fX0.dZiOjWHguo9f42XCMooMcv4EmYFzifl_-LEvPZHCtks`

func TestRest_FileServer(t *testing.T) {
	ts, _, teardown := startupT(t)
	defer teardown()

	testHTMLName := "test-remark.html"
	testHTMLFile := os.TempDir() + "/" + testHTMLName
	err := os.WriteFile(testHTMLFile, []byte("some html"), 0o700)
	assert.NoError(t, err)

	body, code := get(t, ts.URL+"/web/"+testHTMLName)
	assert.Equal(t, http.StatusOK, code)
	assert.Equal(t, "some html", body)
	_ = os.Remove(testHTMLFile)
}

func TestRest_Shutdown(t *testing.T) {
	srv := Rest{Authenticator: &auth.Service{}, ImageProxy: &proxy.Image{}}
	done := make(chan bool)

	// without waiting for channel close at the end goroutine will stay alive after test finish
	// which would create data race with next test
	go func() {
		time.Sleep(200 * time.Millisecond)
		srv.Shutdown()
		close(done)
	}()

	st := time.Now()
	srv.Run("127.0.0.1", 0)
	assert.True(t, time.Since(st).Seconds() < 1, "should take about 100ms")
	<-done
}

func TestRest_filterComments(t *testing.T) {
	user := store.User{ID: "user1", Name: "user name 1"}
	c1 := store.Comment{User: user, Text: "test test #1", Locator: store.Locator{SiteID: "radio-t",
		URL: "https://radio-t.com/blah1"}, Timestamp: time.Date(2018, 5, 27, 1, 14, 10, 0, time.Local)}
	c2 := store.Comment{User: user, Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "radio-t",
		URL: "https://radio-t.com/blah1"}, Timestamp: time.Date(2018, 5, 27, 1, 14, 20, 0, time.Local)}
	c3 := store.Comment{User: user, Text: "test test #3", ParentID: "p1", Locator: store.Locator{SiteID: "radio-t",
		URL: "https://radio-t.com/blah1"}, Timestamp: time.Date(2018, 5, 27, 1, 14, 25, 0, time.Local)}

	r := filterComments([]store.Comment{c1, c2, c3}, func(c store.Comment) bool {
		return c.Text == "test test #1" || c.Text == "test test #3"
	})
	assert.Equal(t, 2, len(r), "one comment filtered")
}

func TestRest_RunStaticSSLMode(t *testing.T) {
	sslPort := chooseRandomUnusedPort()
	srv := Rest{
		Authenticator: auth.NewService(auth.Opts{
			AvatarStore:       avatar.NewLocalFS("/tmp"),
			AvatarResizeLimit: 300,
		}),

		ImageProxy: &proxy.Image{},
		SSLConfig: SSLConfig{
			SSLMode: Static,
			Port:    sslPort,
			Key:     "../../cmd/testdata/key.pem",
			Cert:    "../../cmd/testdata/cert.pem",
		},
		RemarkURL: fmt.Sprintf("https://localhost:%d", sslPort),
	}

	port := chooseRandomUnusedPort()
	go func() {
		srv.Run("", port)
	}()

	waitForHTTPSServerStart(sslPort)

	client := http.Client{
		// prevent http redirect
		CheckRedirect: func(*http.Request, []*http.Request) error {
			return http.ErrUseLastResponse
		},

		// allow self-signed certificate
		Transport: &http.Transport{
			TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
		},
	}
	defer client.CloseIdleConnections()

	resp, err := client.Get(fmt.Sprintf("http://localhost:%d/blah?param=1", port))
	require.NoError(t, err)
	defer resp.Body.Close()
	assert.Equal(t, http.StatusTemporaryRedirect, resp.StatusCode)
	assert.Equal(t, fmt.Sprintf("https://localhost:%d/blah?param=1", sslPort), resp.Header.Get("Location"))

	resp, err = client.Get(fmt.Sprintf("https://localhost:%d/ping", sslPort))
	require.NoError(t, err)
	defer resp.Body.Close()
	assert.Equal(t, http.StatusOK, resp.StatusCode)
	body, err := io.ReadAll(resp.Body)
	assert.NoError(t, err)
	assert.Equal(t, "pong", string(body))

	srv.Shutdown()
}

func TestRest_RunAutocertModeHTTPOnly(t *testing.T) {
	sslPort := chooseRandomUnusedPort()
	srv := Rest{
		Authenticator: &auth.Service{},
		ImageProxy:    &proxy.Image{},
		SSLConfig: SSLConfig{
			SSLMode: Auto,
			Port:    sslPort,
		},
		RemarkURL: fmt.Sprintf("https://localhost:%d", sslPort),
	}

	port := chooseRandomUnusedPort()
	go func() {
		// can't check https server locally, just only http server
		srv.Run("", port)
	}()

	waitForHTTPSServerStart(sslPort)

	client := http.Client{
		// prevent http redirect
		CheckRedirect: func(*http.Request, []*http.Request) error {
			return http.ErrUseLastResponse
		},
	}
	defer client.CloseIdleConnections()

	resp, err := client.Get(fmt.Sprintf("http://localhost:%d/blah?param=1", port))
	require.NoError(t, err)
	defer resp.Body.Close()
	assert.Equal(t, http.StatusTemporaryRedirect, resp.StatusCode)
	assert.Equal(t, fmt.Sprintf("https://localhost:%d/blah?param=1", sslPort), resp.Header.Get("Location"))

	srv.Shutdown()
}

func TestRest_rejectAnonUser(t *testing.T) {
	ts := httptest.NewServer(fakeAuth(rejectAnonUser(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		fmt.Fprintln(w, "Hello")
	}))))
	defer ts.Close()

	resp, err := http.Get(ts.URL)
	require.NoError(t, err)
	require.NoError(t, resp.Body.Close())
	assert.Equal(t, http.StatusUnauthorized, resp.StatusCode, "use not logged in")

	resp, err = http.Get(ts.URL + "?fake_id=anonymous_user123&fake_name=test")
	require.NoError(t, err)
	require.NoError(t, resp.Body.Close())
	assert.Equal(t, http.StatusForbidden, resp.StatusCode, "anon rejected")

	resp, err = http.Get(ts.URL + "?fake_id=real_user123&fake_name=test")
	require.NoError(t, err)
	require.NoError(t, resp.Body.Close())
	assert.Equal(t, http.StatusOK, resp.StatusCode, "real user")
}

func Test_URLKey(t *testing.T) {
	tbl := []struct {
		url  string
		user store.User
		key  string
	}{
		{"http://example.com/1", store.User{}, "http://example.com/1"},
		{"http://example.com/1", store.User{ID: "user"}, "http://example.com/1"},
		{"http://example.com/1", store.User{ID: "user", Admin: true}, "admin!!http://example.com/1"},
	}

	for i, tt := range tbl {
		t.Run(strconv.Itoa(i), func(t *testing.T) {
			r, err := http.NewRequest("GET", tt.url, http.NoBody)
			require.NoError(t, err)
			if tt.user.ID != "" {
				r = rest.SetUserInfo(r, tt.user)
			}
			assert.Equal(t, tt.key, URLKey(r))
		})
	}
}

func Test_URLKeyWithUser(t *testing.T) {
	tbl := []struct {
		url  string
		user store.User
		key  string
	}{
		{"http://example.com/1", store.User{}, "http://example.com/1"},
		{"http://example.com/1", store.User{ID: "user"}, "user!!http://example.com/1"},
		{"http://example.com/2", store.User{ID: "user2"}, "user2!!http://example.com/2"},
		{"http://example.com/1", store.User{ID: "user", Admin: true}, "admin!!user!!http://example.com/1"},
	}

	for i, tt := range tbl {
		t.Run(strconv.Itoa(i), func(t *testing.T) {
			r, err := http.NewRequest("GET", tt.url, http.NoBody)
			require.NoError(t, err)
			if tt.user.ID != "" {
				r = rest.SetUserInfo(r, tt.user)
			}
			assert.Equal(t, tt.key, URLKeyWithUser(r))
		})
	}
}

func TestRest_parseError(t *testing.T) {
	tbl := []struct {
		err error
		res int
	}{
		{fmt.Errorf("can not vote for his own comment"), rest.ErrVoteSelf},
		{fmt.Errorf("already voted for"), rest.ErrVoteDbl},
		{fmt.Errorf("maximum number of votes exceeded for comment"), rest.ErrVoteMax},
		{fmt.Errorf("minimal score reached for comment"), rest.ErrVoteMinScore},
		{fmt.Errorf("too late to edit"), rest.ErrCommentEditExpired},
		{fmt.Errorf("parent comment with reply can't be edited"), rest.ErrCommentEditChanged},
		{fmt.Errorf("blah blah"), rest.ErrInternal},
	}

	for n, tt := range tbl {
		t.Run(strconv.Itoa(n), func(t *testing.T) {
			res := parseError(tt.err, rest.ErrInternal)
			assert.Equal(t, tt.res, res)
		})
	}
}

func TestRest_cacheControl(t *testing.T) {
	tbl := []struct {
		url     string
		version string
		exp     time.Duration
		etag    string
		maxAge  int
	}{
		{"http://example.com/foo", "v1", time.Hour, "b433be1ea19edaee9dc92ca4b895b6bdf3c058cb", 3600},
		{"http://example.com/foo2", "v1", 10 * time.Hour, "6d8466aef3246c1057452561acddf7ad9d0d99e0", 36000},
		{"http://example.com/foo", "v2", time.Hour, "481700c52aab0dfbca99f3ffc2a4fbb27884c114", 3600},
		{"https://example.com/foo", "v2", time.Hour, "bebd4f1b87f474792c4e75e5affe31fbf67f5778", 3600},
	}

	for i, tt := range tbl {
		t.Run(strconv.Itoa(i), func(t *testing.T) {
			req := httptest.NewRequest("GET", tt.url, http.NoBody)
			w := httptest.NewRecorder()

			h := cacheControl(tt.exp, tt.version)(http.HandlerFunc(func(http.ResponseWriter, *http.Request) {}))
			h.ServeHTTP(w, req)
			resp := w.Result()
			assert.Equal(t, http.StatusOK, resp.StatusCode)
			assert.NoError(t, resp.Body.Close())
			t.Logf("%+v", resp.Header)
			assert.Equal(t, `"`+tt.etag+`"`, resp.Header.Get("Etag"))
			assert.Equal(t, `max-age=`+strconv.Itoa(int(tt.exp.Seconds()))+", no-cache", resp.Header.Get("Cache-Control"))
		})
	}
}

func TestRest_frameAncestors(t *testing.T) {
	ts, _, teardown := startupT(t, func(o *Rest) {
		o.AllowedAncestors = []string{"'self'", "https://example.com"}
	})

	// test case with frame-ancestors
	client := http.Client{}
	resp, err := client.Get(ts.URL + "/web/index.html")
	require.NoError(t, err)
	defer resp.Body.Close()
	assert.Equal(t, http.StatusOK, resp.StatusCode)
	assert.Contains(t, resp.Header.Get("Content-Security-Policy"), "frame-ancestors 'self' https://example.com;")
	teardown()

	// test case without frame-ancestors
	ts, _, teardown = startupT(t, func(srv *Rest) {
		srv.AllowedAncestors = []string{}
	})
	defer teardown()
	resp, err = client.Get(ts.URL + "/web/index.html")
	require.NoError(t, err)
	defer resp.Body.Close()
	assert.Equal(t, http.StatusOK, resp.StatusCode)
	assert.Contains(t, resp.Header.Get("Content-Security-Policy"), "frame-ancestors *;")
}

// check CSP, img-src should be 'self' with proxy enabled and * without it
func TestRest_securityHeaders(t *testing.T) {
	ts, _, teardown := startupT(t)

	// with proxy disabled
	client := http.Client{}
	resp, err := client.Get(ts.URL + "/web/index.html")
	require.NoError(t, err)
	defer resp.Body.Close()
	assert.Equal(t, http.StatusOK, resp.StatusCode)
	assert.Contains(t, resp.Header.Get("Content-Security-Policy"), "img-src *;")
	assert.Equal(t, "nosniff", resp.Header.Get("X-Content-Type-Options"))
	assert.Equal(t, "strict-origin-when-cross-origin", resp.Header.Get("Referrer-Policy"))
	teardown()

	// check CSP with proxy enabled
	ts, _, teardown = startupT(t, func(srv *Rest) {
		srv.ExternalImageProxy = true
	})
	defer teardown()
	resp, err = client.Get(ts.URL + "/web/index.html")
	require.NoError(t, err)
	defer resp.Body.Close()
	assert.Equal(t, http.StatusOK, resp.StatusCode)
	assert.Contains(t, resp.Header.Get("Content-Security-Policy"), "img-src 'self';")
	assert.Equal(t, "nosniff", resp.Header.Get("X-Content-Type-Options"))
	assert.Equal(t, "strict-origin-when-cross-origin", resp.Header.Get("Referrer-Policy"))
}

func TestRest_subscribersOnly(t *testing.T) {
	paidSubUser := &token.User{}
	paidSubUser.SetPaidSub(true)

	tbl := []struct {
		subsOnly bool
		user     token.User
		setUser  bool
		status   int
	}{
		{true, token.User{}, false, http.StatusUnauthorized},
		{true, token.User{}, true, http.StatusForbidden},
		{false, token.User{}, false, http.StatusOK},
		{false, token.User{}, true, http.StatusOK},
		{true, *paidSubUser, true, http.StatusOK},
	}

	for i, tt := range tbl {
		t.Run(strconv.Itoa(i), func(t *testing.T) {
			req := httptest.NewRequest("GET", "http://example.com", http.NoBody)
			if tt.setUser {
				req = token.SetUserInfo(req, tt.user)
			}
			w := httptest.NewRecorder()
			h := subscribersOnly(tt.subsOnly)(http.HandlerFunc(func(http.ResponseWriter, *http.Request) {}))
			h.ServeHTTP(w, req)
			resp := w.Result()
			assert.Equal(t, tt.status, resp.StatusCode)
			assert.NoError(t, resp.Body.Close())
		})
	}
}

func Test_validEmailAuth(t *testing.T) {
	tbl := []struct {
		req    string
		status int
	}{
		{"/auth/email/login?site=remark42&address=umputun%example.com&user=someone", http.StatusOK},
		{"/auth/email/login?site=site-with-dash_and_underscore-and.dot&address=umputun%example.com&user=someone", http.StatusOK},
		{"/auth/email/login?site=remark42&address=umputun%example.com&user=someone+blah", http.StatusOK},
		{"/auth/email/login?site=remark42&address=umputun%example.com&user=Евгений+Умпутун", http.StatusOK},
		{"/auth/email/login?site=remark42&address=umputun%example.com&user=12", http.StatusForbidden},
		{"/auth/email/login?site=remark42&address=umputun%example.com&user=..blah+blah", http.StatusForbidden},
		{"/auth/email/login?site=remark42&address=umputun%example.com&user=someonelooong+loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong", http.StatusForbidden},
		{"/auth/twitter/login?site=remark42&address=umputun%example.com&user=..blah+blah", http.StatusOK},
		{"/auth/email/login?site=remark42&address=umputun%example.com", http.StatusOK},
		{"/auth/email/login?site=remark42&address=umputun+example.com&user=someone", http.StatusForbidden},
		{"/auth/email/login?site=bad!site&address=umputun%example.com&user=someone", http.StatusForbidden},
		{"/auth/email/login?site=loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooongsite&address=umputun%example.com&user=someone", http.StatusForbidden},
	}

	for i, tt := range tbl {
		t.Run(strconv.Itoa(i), func(t *testing.T) {
			req := httptest.NewRequest("GET", "http://example.com"+tt.req, http.NoBody)
			w := httptest.NewRecorder()
			h := validEmailAuth()(http.HandlerFunc(func(http.ResponseWriter, *http.Request) {}))
			h.ServeHTTP(w, req)
			resp := w.Result()
			assert.Equal(t, tt.status, resp.StatusCode)
			assert.NoError(t, resp.Body.Close())
		})
	}
}

// randomPath pick a file or folder name which is not in use for sure
func randomPath(tempDir, basename, suffix string) (string, error) {
	for range 10 {
		fname := fmt.Sprintf("/%s/%s-%d%s", tempDir, basename, rand.Int31(), suffix)
		fmt.Printf("fname %q", fname)
		_, err := os.Stat(fname)
		if err != nil {
			return fname, nil
		}
	}
	return "", fmt.Errorf("cannot create temp file in %s", tempDir)
}

// startupT runs fully configured testing server
// srvHook is an optional func to set some Rest param after the creation but prior to Run
func startupT(t *testing.T, srvHook ...func(srv *Rest)) (ts *httptest.Server, srv *Rest, teardown func()) {
	tmp := os.TempDir()
	testDB, err := randomPath(tmp, "test-remark", ".db")
	require.NoError(t, err)

	_ = os.RemoveAll(tmp + "/ava-remark42")
	_ = os.RemoveAll(tmp + "/pics-remark42")

	b, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{FileName: testDB, SiteID: "remark42"})
	require.NoError(t, err)

	memCache := cache.NewScache[[]byte](cache.NewNopCache[[]byte]())

	astore := adminstore.NewStaticStore("123456", []string{"remark42"}, []string{"a1", "a2"}, "admin@remark-42.com")
	restrictedWordsMatcher := service.NewRestrictedWordsMatcher(service.StaticRestrictedWordsLister{Words: []string{"duck"}})

	dataStore := &service.DataStore{
		Engine:                 b,
		EditDuration:           5 * time.Minute,
		MaxCommentSize:         4000,
		AdminStore:             astore,
		MaxVotes:               service.UnlimitedVotes,
		RestrictedWordsMatcher: restrictedWordsMatcher,
	}

	remarkURL := "https://demo.remark42.com"

	srv = &Rest{
		DataService: dataStore,
		Authenticator: auth.NewService(auth.Opts{
			AdminPasswd:  "password",
			SecretReader: token.SecretFunc(func(string) (string, error) { return "secret", nil }),
			AvatarStore:  avatar.NewLocalFS(tmp + "/ava-remark42"),
		}),
		Cache:     memCache,
		WebRoot:   tmp,
		RemarkURL: remarkURL,
		ImageService: image.NewService(&image.FileSystem{
			Location:   tmp + "/pics-remark42",
			Partitions: 100,
			Staging:    tmp + "/pics-remark42/staging",
		}, image.ServiceParams{
			EditDuration: 100 * time.Millisecond,
			ImageAPI:     remarkURL + "/api/v1/picture/",
			ProxyAPI:     remarkURL + "/api/v1/img",
			MaxSize:      10000,
		}),
		ImageProxy:       &proxy.Image{},
		ReadOnlyAge:      10,
		CommentFormatter: store.NewCommentFormatter(&proxy.Image{}),
		Migrator: &Migrator{
			DisqusImporter:    &migrator.Disqus{DataStore: dataStore},
			WordPressImporter: &migrator.WordPress{DataStore: dataStore},
			CommentoImporter:  &migrator.Commento{DataStore: dataStore},
			NativeImporter:    &migrator.Native{DataStore: dataStore},
			NativeExporter:    &migrator.Native{DataStore: dataStore},
			URLMapperMaker:    migrator.NewURLMapper,
			Cache:             memCache,
			KeyStore:          astore,
		},
		NotifyService:    notify.NopService,
		EmojiEnabled:     true,
		openRouteLimiter: 100,
	}
	srv.ScoreThresholds.Low, srv.ScoreThresholds.Critical = -5, -10

	// add some providers. Needed because we don't allow users with unlisted providers to authenticate
	providers := []string{"provider1", "anonymous", "github", "email"}
	for _, p := range providers {
		srv.Authenticator.AddDirectProvider(p, provider.CredCheckerFunc(func(_, _ string) (ok bool, err error) {
			return true, nil
		}))
	}

	for _, h := range srvHook {
		h(srv)
	}

	routes := srv.routes()
	ts = httptest.NewServer(routes)

	teardown = func() {
		ts.Close()
		require.NoError(t, srv.DataService.Close())
		_ = os.Remove(testDB)
		_ = os.RemoveAll(tmp + "/ava-remark42")
		_ = os.RemoveAll(tmp + "/pics-remark42")
	}

	return ts, srv, teardown
}

// fake auth middleware make user authenticated and uses query's fake_id for ID and fake_name for Name
func fakeAuth(next http.Handler) http.Handler {
	fn := func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Query().Get("fake_id") != "" {
			r = rest.SetUserInfo(r, store.User{
				ID:   r.URL.Query().Get("fake_id"),
				Name: r.URL.Query().Get("fake_name"),
			})
		}
		next.ServeHTTP(w, r)
	}
	return http.HandlerFunc(fn)
}

func get(t *testing.T, url string) (response string, statusCode int) {
	r, err := http.Get(url)
	require.NoError(t, err)
	body, err := io.ReadAll(r.Body)
	require.NoError(t, err)
	require.NoError(t, r.Body.Close())
	return string(body), r.StatusCode
}

func sendReq(_ *testing.T, r *http.Request, tkn string) (*http.Response, error) {
	client := http.Client{Timeout: 5 * time.Second}
	defer client.CloseIdleConnections()
	if tkn != "" {
		r.Header.Set("X-JWT", tkn)
	}
	return client.Do(r)
}

func getWithDevAuth(t *testing.T, url string) (body string, code int) {
	client := &http.Client{Timeout: 5 * time.Second}
	defer client.CloseIdleConnections()
	req, err := http.NewRequest("GET", url, http.NoBody)
	require.NoError(t, err)
	req.Header.Add("X-JWT", devToken)
	r, err := client.Do(req)
	require.NoError(t, err)
	b, err := io.ReadAll(r.Body)
	assert.NoError(t, err)
	require.NoError(t, r.Body.Close())
	return string(b), r.StatusCode
}

func getWithDev2Auth(t *testing.T, url string) (body string, code int) {
	client := &http.Client{Timeout: 5 * time.Second}
	defer client.CloseIdleConnections()
	req, err := http.NewRequest("GET", url, http.NoBody)
	require.NoError(t, err)
	req.Header.Add("X-JWT", dev2Token)
	r, err := client.Do(req)
	require.NoError(t, err)
	b, err := io.ReadAll(r.Body)
	assert.NoError(t, err)
	require.NoError(t, r.Body.Close())
	return string(b), r.StatusCode
}

func getWithAdminAuth(t *testing.T, url string) (response string, statusCode int) {
	client := &http.Client{Timeout: 5 * time.Second}
	defer client.CloseIdleConnections()
	req, err := http.NewRequest("GET", url, http.NoBody)
	require.NoError(t, err)
	req.SetBasicAuth("admin", "password")
	r, err := client.Do(req)
	require.NoError(t, err)
	body, err := io.ReadAll(r.Body)
	assert.NoError(t, err)
	require.NoError(t, r.Body.Close())
	return string(body), r.StatusCode
}
func post(t *testing.T, url, body string) (*http.Response, error) {
	client := &http.Client{Timeout: 5 * time.Second}
	defer client.CloseIdleConnections()
	req, err := http.NewRequest("POST", url, strings.NewReader(body))
	assert.NoError(t, err)
	req.SetBasicAuth("admin", "password")
	return client.Do(req)
}

func addCommentGetCreatedTime(t *testing.T, c store.Comment, ts *httptest.Server) (id string, created time.Time) {
	b, err := json.Marshal(c)
	require.NoError(t, err, "can't marshal comment %+v", c)

	client := &http.Client{Timeout: 5 * time.Second}
	defer client.CloseIdleConnections()
	postURL := ts.URL + "/api/v1/comment"
	if c.Locator.SiteID != "" {
		postURL += "?site=" + c.Locator.SiteID
	}
	req, err := http.NewRequest("POST", postURL, bytes.NewBuffer(b))
	require.NoError(t, err)
	req.Header.Add("X-JWT", devToken)
	resp, err := client.Do(req)
	require.NoError(t, err)
	require.Equal(t, http.StatusCreated, resp.StatusCode)
	b, err = io.ReadAll(resp.Body)
	require.NoError(t, resp.Body.Close())
	require.NoError(t, err)

	crResp := R.JSON{}
	err = json.Unmarshal(b, &crResp)
	require.NoError(t, err)
	time.Sleep(time.Nanosecond * 10)
	created, err = time.Parse(time.RFC3339, crResp["time"].(string))
	require.NoError(t, err)
	return crResp["id"].(string), created
}

func addComment(t *testing.T, c store.Comment, ts *httptest.Server) string {
	id, _ := addCommentGetCreatedTime(t, c, ts)
	return id
}

func requireAdminOnly(t *testing.T, req *http.Request) {
	resp, err := sendReq(t, req, "") // no-auth user
	require.NoError(t, err)
	require.NoError(t, resp.Body.Close())
	assert.Equal(t, http.StatusUnauthorized, resp.StatusCode)

	resp, err = sendReq(t, req, devToken) // non-admin user
	require.NoError(t, err)
	require.NoError(t, resp.Body.Close())
	assert.Equal(t, http.StatusForbidden, resp.StatusCode)
}

func chooseRandomUnusedPort() (port int) {
	for range 10 {
		port = 40000 + int(rand.Int31n(10000))
		if ln, err := net.Listen("tcp", fmt.Sprintf(":%d", port)); err == nil {
			_ = ln.Close()
			break
		}
	}
	return port
}

func waitForHTTPSServerStart(port int) {
	// wait for up to 3 seconds for HTTPS server to start
	for range 300 {
		time.Sleep(time.Millisecond * 10)
		conn, _ := net.DialTimeout("tcp", fmt.Sprintf("localhost:%d", port), time.Millisecond*10)
		if conn != nil {
			_ = conn.Close()
			break
		}
	}
}

func TestMain(m *testing.M) {
	goleak.VerifyTestMain(
		m,
		// this will be fixed in https://github.com/hashicorp/golang-lru/issues/159
		goleak.IgnoreTopFunction("github.com/hashicorp/golang-lru/v2/expirable.NewLRU[...].func1"),
	)
}

// TestRest_matchSiteID reproduces the multi-tenant isolation gap in the matchSiteID
// middleware. Before the fix, the check `if siteID != "" && user.SiteID != siteID`
// silently allowed any authenticated request that omitted the ?site= query param.
// On admin and user-mutation routes this meant the cross-site check was bypassable
// just by dropping the parameter. The fix requires ?site= to be present and to match
// the user's bound site.
func TestRest_matchSiteID(t *testing.T) {
	wrapped := matchSiteID(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte("ok"))
	}))

	cases := []struct {
		name     string
		userSite string
		query    string
		want     int
	}{
		{name: "matching site allowed", userSite: "site-a", query: "?site=site-a", want: http.StatusOK},
		{name: "mismatched site forbidden", userSite: "site-a", query: "?site=site-b", want: http.StatusForbidden},
		{name: "missing site param rejected", userSite: "site-a", query: "", want: http.StatusForbidden},
		{name: "empty site param rejected", userSite: "site-a", query: "?site=", want: http.StatusForbidden},
	}

	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			h := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
				r = rest.SetUserInfo(r, store.User{ID: "u", Name: "u", SiteID: c.userSite})
				wrapped.ServeHTTP(w, r)
			})
			ts := httptest.NewServer(h)
			defer ts.Close()
			resp, err := http.Get(ts.URL + c.query)
			require.NoError(t, err)
			require.NoError(t, resp.Body.Close())
			assert.Equal(t, c.want, resp.StatusCode)
		})
	}
}