package http

import (
	"bytes"
	"compress/gzip"
	"encoding/json"
	"fmt"
	"io"
	"io/ioutil"
	"net/http"
	"net/url"
	"os"
	"strings"
	"testing"
	"time"

	"github.com/rqlite/rqlite/cluster"
	"github.com/rqlite/rqlite/command"
	"github.com/rqlite/rqlite/store"
)

func Test_ResponseJSONMarshal(t *testing.T) {
	resp := NewResponse()
	b, err := json.Marshal(resp)
	if err != nil {
		t.Fatalf("error JSON marshaling empty Response: %s", err.Error())
	}
	if exp, got := `{"results":[]}`, string(b); exp != got {
		t.Fatalf("Incorrect marshal, exp: %s, got: %s", exp, got)
	}

	resp = NewResponse()
	resp.Results.ExecuteResult = []*command.ExecuteResult{{
		LastInsertId: 39,
		RowsAffected: 45,
		Time:         1234,
	}}
	b, err = json.Marshal(resp)
	if err != nil {
		t.Fatalf("failed to JSON marshal empty Response: %s", err)
	}
	if exp, got := `{"results":[{"last_insert_id":39,"rows_affected":45,"time":1234}]}`, string(b); exp != got {
		t.Fatalf("Incorrect marshal, exp: %s, got: %s", exp, got)
	}

	resp = NewResponse()
	resp.Results.QueryRows = []*command.QueryRows{{
		Columns: []string{"id", "name"},
		Types:   []string{"int", "string"},
	}}
	b, err = json.Marshal(resp)
	if err != nil {
		t.Fatalf("failed to JSON marshal empty Response: %s", err)
	}
	if exp, got := `{"results":[{"columns":["id","name"],"types":["int","string"]}]}`, string(b); exp != got {
		t.Fatalf("Incorrect marshal, exp: %s, got: %s", exp, got)
	}

	resp = NewResponse()
	resp.Results.QueryRows = []*command.QueryRows{{
		Columns: []string{"id", "name"},
		Types:   []string{"int", "string"},
		Values: []*command.Values{
			{
				Parameters: []*command.Parameter{
					{
						Value: &command.Parameter_S{
							S: "fiona",
						},
					},
					{
						Value: &command.Parameter_I{
							I: 5,
						},
					},
				},
			},
		},
	}}
	b, err = json.Marshal(resp)
	if err != nil {
		t.Fatalf("failed to JSON marshal empty Response: %s", err)
	}
	if exp, got := `{"results":[{"columns":["id","name"],"types":["int","string"],"values":[["fiona",5]]}]}`, string(b); exp != got {
		t.Fatalf("Incorrect marshal, exp: %s, got: %s", exp, got)
	}
}

func Test_NewService(t *testing.T) {
	store := &MockStore{}
	cluster := &mockClusterService{}
	cred := &mockCredentialStore{HasPermOK: true}
	s := New("127.0.0.1:0", store, cluster, cred)
	if s == nil {
		t.Fatalf("failed to create new service")
	}
	if s.HTTPS() {
		t.Fatalf("expected service to report not HTTPS")
	}
}

func Test_HasVersionHeader(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()
	s.BuildInfo = map[string]interface{}{
		"version": "the version",
	}
	url := fmt.Sprintf("http://%s", s.Addr().String())

	client := &http.Client{}
	resp, err := client.Get(url)
	if err != nil {
		t.Fatalf("failed to make request")
	}

	if resp.Header.Get("X-RQLITE-VERSION") != "the version" {
		t.Fatalf("incorrect build version present in HTTP response header")
	}
}

func Test_HasContentTypeJSON(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	client := &http.Client{}
	resp, err := client.Get(fmt.Sprintf("http://%s/status", s.Addr().String()))
	if err != nil {
		t.Fatalf("failed to make request")
	}

	h := resp.Header.Get("Content-Type")
	if h != "application/json; charset=utf-8" {
		t.Fatalf("incorrect Content-type in HTTP response: %s", h)
	}
}

func Test_HasContentTypeOctetStream(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	client := &http.Client{}
	resp, err := client.Get(fmt.Sprintf("http://%s/db/backup", s.Addr().String()))
	if err != nil {
		t.Fatalf("failed to make request")
	}

	h := resp.Header.Get("Content-Type")
	if h != "application/octet-stream" {
		t.Fatalf("incorrect Content-type in HTTP response: %s", h)
	}
}

func Test_HasVersionHeaderUnknown(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()
	url := fmt.Sprintf("http://%s", s.Addr().String())

	client := &http.Client{}
	resp, err := client.Get(url)
	if err != nil {
		t.Fatalf("failed to make request")
	}

	if resp.Header.Get("X-RQLITE-VERSION") != "unknown" {
		t.Fatalf("incorrect build version present in HTTP response header")
	}
}

func Test_404Routes(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()
	host := fmt.Sprintf("http://%s", s.Addr().String())

	client := &http.Client{}

	resp, err := client.Get(host + "/db/xxx")
	if err != nil {
		t.Fatalf("failed to make request")
	}
	if resp.StatusCode != 404 {
		t.Fatalf("failed to get expected 404, got %d", resp.StatusCode)
	}

	resp, err = client.Post(host+"/xxx", "", nil)
	if err != nil {
		t.Fatalf("failed to make request")
	}
	if resp.StatusCode != 404 {
		t.Fatalf("failed to get expected 404, got %d", resp.StatusCode)
	}
}

func Test_404Routes_ExpvarPprofDisabled(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()
	host := fmt.Sprintf("http://%s", s.Addr().String())

	client := &http.Client{}

	for _, path := range []string{
		"/debug/vars",
		"/debug/pprof/cmdline",
		"/debug/pprof/profile",
		"/debug/pprof/symbol",
	} {
		req, err := http.NewRequest("GET", host+path, nil)
		if err != nil {
			t.Fatalf("failed to create request: %s", err.Error())
		}
		resp, err := client.Do(req)
		if err != nil {
			t.Fatalf("failed to make request: %s", err.Error())
		}
		if resp.StatusCode != 404 {
			t.Fatalf("failed to get expected 404 for path %s, got %d", path, resp.StatusCode)
		}
	}
}

func Test_405Routes(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()
	host := fmt.Sprintf("http://%s", s.Addr().String())

	client := &http.Client{}

	resp, err := client.Get(host + "/db/execute")
	if err != nil {
		t.Fatalf("failed to make request")
	}
	if resp.StatusCode != 405 {
		t.Fatalf("failed to get expected 405, got %d", resp.StatusCode)
	}

	resp, err = client.Get(host + "/remove")
	if err != nil {
		t.Fatalf("failed to make request")
	}
	if resp.StatusCode != 405 {
		t.Fatalf("failed to get expected 405, got %d", resp.StatusCode)
	}

	resp, err = client.Post(host+"/remove", "", nil)
	if err != nil {
		t.Fatalf("failed to make request")
	}
	if resp.StatusCode != 405 {
		t.Fatalf("failed to get expected 405, got %d", resp.StatusCode)
	}

	resp, err = client.Get(host + "/join")
	if err != nil {
		t.Fatalf("failed to make request")
	}
	if resp.StatusCode != 405 {
		t.Fatalf("failed to get expected 405, got %d", resp.StatusCode)
	}

	resp, err = client.Get(host + "/notify")
	if err != nil {
		t.Fatalf("failed to make request")
	}
	if resp.StatusCode != 405 {
		t.Fatalf("failed to get expected 405, got %d", resp.StatusCode)
	}

	resp, err = client.Post(host+"/db/backup", "", nil)
	if err != nil {
		t.Fatalf("failed to make request")
	}
	if resp.StatusCode != 405 {
		t.Fatalf("failed to get expected 405, got %d", resp.StatusCode)
	}

	resp, err = client.Post(host+"/status", "", nil)
	if err != nil {
		t.Fatalf("failed to make request")
	}
	if resp.StatusCode != 405 {
		t.Fatalf("failed to get expected 405, got %d", resp.StatusCode)
	}
}

func Test_400Routes(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()
	host := fmt.Sprintf("http://%s", s.Addr().String())

	client := &http.Client{}

	resp, err := client.Get(host + "/db/query?q=")
	if err != nil {
		t.Fatalf("failed to make request")
	}
	if resp.StatusCode != 400 {
		t.Fatalf("failed to get expected 400, got %d", resp.StatusCode)
	}
}

func Test_401Routes_NoBasicAuth(t *testing.T) {
	c := &mockCredentialStore{HasPermOK: false}

	m := &MockStore{}
	n := &mockClusterService{}
	s := New("127.0.0.1:0", m, n, c)
	s.Expvar = true
	s.Pprof = true
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()
	host := fmt.Sprintf("http://%s", s.Addr().String())

	client := &http.Client{}

	for _, path := range []string{
		"/db/execute",
		"/db/query",
		"/db/request",
		"/db/backup",
		"/db/load",
		"/join",
		"/notify",
		"/remove",
		"/status",
		"/nodes",
		"/readyz",
		"/debug/vars",
		"/debug/pprof/cmdline",
		"/debug/pprof/profile",
		"/debug/pprof/symbol",
	} {
		resp, err := client.Get(host + path)
		if err != nil {
			t.Fatalf("failed to make request")
		}
		if resp.StatusCode != 401 {
			t.Fatalf("failed to get expected 401 for path %s, got %d", path, resp.StatusCode)
		}
	}
}

func Test_401Routes_BasicAuthBadPassword(t *testing.T) {
	c := &mockCredentialStore{HasPermOK: false}

	m := &MockStore{}
	n := &mockClusterService{}
	s := New("127.0.0.1:0", m, n, c)
	s.Expvar = true
	s.Pprof = true
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()
	host := fmt.Sprintf("http://%s", s.Addr().String())

	client := &http.Client{}

	for _, path := range []string{
		"/db/execute",
		"/db/query",
		"/db/request",
		"/db/backup",
		"/db/load",
		"/join",
		"/notify",
		"/status",
		"/nodes",
		"/readyz",
		"/debug/vars",
		"/debug/pprof/cmdline",
		"/debug/pprof/profile",
		"/debug/pprof/symbol",
	} {
		req, err := http.NewRequest("GET", host+path, nil)
		if err != nil {
			t.Fatalf("failed to create request: %s", err.Error())
		}
		req.SetBasicAuth("username1", "password1")

		resp, err := client.Do(req)
		if err != nil {
			t.Fatalf("failed to make request: %s", err.Error())
		}
		if resp.StatusCode != 401 {
			t.Fatalf("failed to get expected 401 for path %s, got %d", path, resp.StatusCode)
		}
	}
}

func Test_401Routes_BasicAuthBadPerm(t *testing.T) {
	c := &mockCredentialStore{HasPermOK: false}

	m := &MockStore{}
	n := &mockClusterService{}
	s := New("127.0.0.1:0", m, n, c)
	s.Expvar = true
	s.Pprof = true
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()
	host := fmt.Sprintf("http://%s", s.Addr().String())

	client := &http.Client{}

	for _, path := range []string{
		"/db/execute",
		"/db/query",
		"/db/backup",
		"/db/request",
		"/db/load",
		"/join",
		"/notify",
		"/status",
		"/nodes",
		"/readyz",
		"/debug/vars",
		"/debug/pprof/cmdline",
		"/debug/pprof/profile",
		"/debug/pprof/symbol",
	} {
		req, err := http.NewRequest("GET", host+path, nil)
		if err != nil {
			t.Fatalf("failed to create request: %s", err.Error())
		}
		req.SetBasicAuth("username1", "password1")

		resp, err := client.Do(req)
		if err != nil {
			t.Fatalf("failed to make request: %s", err.Error())
		}
		if resp.StatusCode != 401 {
			t.Fatalf("failed to get expected 401 for path %s, got %d", path, resp.StatusCode)
		}
	}
}

func Test_401Join(t *testing.T) {
	jf := func(_, _, perm string) bool {
		return perm == "join" || perm == "join-read-only"
	}
	c := &mockCredentialStore{aaFunc: jf}

	m := &MockStore{}
	n := &mockClusterService{}
	s := New("127.0.0.1:0", m, n, c)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	client := &http.Client{}
	host := fmt.Sprintf("http://%s", s.Addr().String())

	resp, err := client.Post(host+"/join", "application/json", strings.NewReader(`{"id": "1", "addr":"localhost:4001", "voter": true}`))
	if err != nil {
		t.Fatalf("failed to make join request")
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for join, got %d", resp.StatusCode)
	}

	resp, err = client.Post(host+"/join", "application/json", strings.NewReader(`{"id": "1", "addr":"localhost:4001"}`))
	if err != nil {
		t.Fatalf("failed to make join request")
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for join, got %d", resp.StatusCode)
	}

	resp, err = client.Post(host+"/join", "application/json", strings.NewReader(`{"id": "1", "addr":"localhost:4001", "voter": false}`))
	if err != nil {
		t.Fatalf("failed to make join request")
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for non-voter join, got %d", resp.StatusCode)
	}
}

func Test_401JoinReadOnly(t *testing.T) {
	jf := func(_, _, perm string) bool {
		return perm == "join-read-only"
	}
	c := &mockCredentialStore{aaFunc: jf}

	m := &MockStore{}
	n := &mockClusterService{}
	s := New("127.0.0.1:0", m, n, c)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	client := &http.Client{}
	host := fmt.Sprintf("http://%s", s.Addr().String())

	resp, err := client.Post(host+"/join", "application/json", strings.NewReader(`{"id": "1", "addr":"localhost:4001", "voter": true}`))
	if err != nil {
		t.Fatalf("failed to make join request")
	}
	if resp.StatusCode != http.StatusUnauthorized {
		t.Fatalf("failed to get expected StatusUnauthorized for join, got %d", resp.StatusCode)
	}

	resp, err = client.Post(host+"/join", "application/json", strings.NewReader(`{"id": "1", "addr":"localhost:4001"}`))
	if err != nil {
		t.Fatalf("failed to make join request")
	}
	if resp.StatusCode != http.StatusUnauthorized {
		t.Fatalf("failed to get expected StatusUnauthorized for join, got %d", resp.StatusCode)
	}

	resp, err = client.Post(host+"/join", "application/json", strings.NewReader(`{"id": "1", "addr":"localhost:4001", "voter": false}`))
	if err != nil {
		t.Fatalf("failed to make join request")
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for non-voter join, got %d", resp.StatusCode)
	}
}

func Test_BackupOK(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	m.backupFn = func(br *command.BackupRequest, dst io.Writer) error {
		return nil
	}

	client := &http.Client{}
	host := fmt.Sprintf("http://%s", s.Addr().String())
	resp, err := client.Get(host + "/db/backup")
	if err != nil {
		t.Fatalf("failed to make backup request")
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for backup, got %d", resp.StatusCode)
	}
}

func Test_BackupFlagsNoLeaderRedirect(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{
		apiAddr: "http://1.2.3.4:999",
	}

	s := New("127.0.0.1:0", m, c, nil)

	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	m.backupFn = func(br *command.BackupRequest, dst io.Writer) error {
		return store.ErrNotLeader
	}

	client := &http.Client{}
	client.CheckRedirect = func(req *http.Request, via []*http.Request) error {
		return http.ErrUseLastResponse
	}

	host := fmt.Sprintf("http://%s", s.Addr().String())
	resp, err := client.Get(host + "/db/backup?redirect")
	if err != nil {
		t.Fatalf("failed to make backup request: %s", err.Error())
	}
	if resp.StatusCode != http.StatusMovedPermanently {
		t.Fatalf("failed to get expected StatusServiceUnavailable for backup, got %d", resp.StatusCode)
	}
}

func Test_BackupFlagsNoLeaderRemoteFetch(t *testing.T) {
	m := &MockStore{
		leaderAddr: "foo:1234",
	}
	c := &mockClusterService{
		apiAddr: "http://1.2.3.4:999",
	}

	s := New("127.0.0.1:0", m, c, nil)

	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	m.backupFn = func(br *command.BackupRequest, dst io.Writer) error {
		return store.ErrNotLeader
	}

	backupData := "this is SQLite data"
	c.backupFn = func(br *command.BackupRequest, addr string, t time.Duration, w io.Writer) error {
		w.Write([]byte(backupData))
		return nil
	}

	client := &http.Client{}
	client.CheckRedirect = func(req *http.Request, via []*http.Request) error {
		return http.ErrUseLastResponse
	}

	host := fmt.Sprintf("http://%s", s.Addr().String())
	resp, err := client.Get(host + "/db/backup")
	if err != nil {
		t.Fatalf("failed to make backup request: %s", err.Error())
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for remote backup fetch, got %d", resp.StatusCode)
	}
	defer resp.Body.Close()
	body, err := io.ReadAll(resp.Body)
	if err != nil {
		t.Fatalf("failed to read response body: %s", err.Error())
	}
	if exp, got := backupData, string(body); exp != got {
		t.Fatalf("received incorrect backup data, exp: %s, got: %s", exp, got)
	}
}

func Test_BackupFlagsNoLeaderOK(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{
		apiAddr: "http://1.2.3.4:999",
	}

	s := New("127.0.0.1:0", m, c, nil)

	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	m.backupFn = func(br *command.BackupRequest, dst io.Writer) error {
		if !br.Leader {
			return nil
		}
		return store.ErrNotLeader
	}

	client := &http.Client{}
	host := fmt.Sprintf("http://%s", s.Addr().String())
	resp, err := client.Get(host + "/db/backup?noleader")
	if err != nil {
		t.Fatalf("failed to make backup request")
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for backup, got %d", resp.StatusCode)
	}
}

func Test_LoadOK(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	client := &http.Client{}
	host := fmt.Sprintf("http://%s", s.Addr().String())
	resp, err := client.Post(host+"/db/load", "application/octet-stream", strings.NewReader("SELECT"))
	if err != nil {
		t.Fatalf("failed to make load request")
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for load, got %d", resp.StatusCode)
	}
	body, err := io.ReadAll(resp.Body)
	if err != nil {
		t.Fatalf("failed to read response body: %s", err.Error())
	}
	if exp, got := `{"results":[]}`, string(body); exp != got {
		t.Fatalf("incorrect response body, exp: %s, got %s", exp, got)
	}
}

func Test_LoadFlagsNoLeader(t *testing.T) {
	m := &MockStore{
		leaderAddr: "foo:1234",
	}
	c := &mockClusterService{
		apiAddr: "http://1.2.3.4:999",
	}

	s := New("127.0.0.1:0", m, c, nil)

	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	testData, err := os.ReadFile("testdata/load.db")
	if err != nil {
		t.Fatalf("failed to load test SQLite data")
	}

	m.loadChunkFn = func(br *command.LoadChunkRequest) error {
		return store.ErrNotLeader
	}

	clusterLoadCalled := false
	c.loadChunkFn = func(lc *command.LoadChunkRequest, nodeAddr string, timeout time.Duration) error {
		clusterLoadCalled = true
		if !bytes.Equal(mustGunzip(lc.Data), testData) {
			t.Fatalf("wrong data passed to cluster load")
		}
		return nil
	}

	client := &http.Client{}
	host := fmt.Sprintf("http://%s", s.Addr().String())
	resp, err := client.Post(host+"/db/load", "application/octet-stream", bytes.NewReader(testData))
	if err != nil {
		t.Fatalf("failed to make load request")
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for load, got %d", resp.StatusCode)
	}

	if !clusterLoadCalled {
		t.Fatalf("cluster load was not called")
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		t.Fatalf("failed to read response body: %s", err.Error())
	}
	if exp, got := `{"results":[]}`, string(body); exp != got {
		t.Fatalf("incorrect response body, exp: %s, got %s", exp, got)
	}
}

func Test_LoadRemoteError(t *testing.T) {
	m := &MockStore{
		leaderAddr: "foo:1234",
	}
	c := &mockClusterService{
		apiAddr: "http://1.2.3.4:999",
	}

	s := New("127.0.0.1:0", m, c, nil)

	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	testData, err := os.ReadFile("testdata/load.db")
	if err != nil {
		t.Fatalf("failed to load test SQLite data")
	}

	m.loadChunkFn = func(br *command.LoadChunkRequest) error {
		return store.ErrNotLeader
	}
	clusterLoadCalled := false
	c.loadChunkFn = func(lr *command.LoadChunkRequest, addr string, t time.Duration) error {
		clusterLoadCalled = true
		return fmt.Errorf("the load failed")
	}

	client := &http.Client{}
	host := fmt.Sprintf("http://%s", s.Addr().String())
	resp, err := client.Post(host+"/db/load", "application/octet-stream", bytes.NewReader(testData))
	if err != nil {
		t.Fatalf("failed to make load request")
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusInternalServerError {
		t.Fatalf("failed to get expected StatusInternalServerError for load, got %d", resp.StatusCode)
	}

	if !clusterLoadCalled {
		t.Fatalf("cluster load was not called")
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		t.Fatalf("failed to read response body: %s", err.Error())
	}
	if exp, got := "the load failed\n", string(body); exp != got {
		t.Fatalf(`incorrect response body, exp: "%s", got: "%s"`, exp, got)
	}
}

func Test_NotifyLocalhost(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	client := &http.Client{}
	host := fmt.Sprintf("http://%s", s.Addr().String())
	resp, err := client.Post(host+"/notify", "application/json", mustMarshalNotifyMap("id1", "localhost"))
	if err != nil {
		t.Fatalf("failed to make load request")
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for notify, got %d", resp.StatusCode)
	}
}

func Test_NotifyNoResolve(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	client := &http.Client{}
	host := fmt.Sprintf("http://%s", s.Addr().String())
	resp, err := client.Post(host+"/notify", "application/json", mustMarshalNotifyMap("id1", "nonsense-domain:4444"))
	if err != nil {
		t.Fatalf("failed to make load request")
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusServiceUnavailable {
		t.Fatalf("failed to get expected StatusOK for load, got %d", resp.StatusCode)
	}
}

func mustMarshalNotifyMap(id, addr string) io.Reader {
	buf, err := json.Marshal(map[string]interface{}{
		"id":   id,
		"addr": addr,
	})
	if err != nil {
		panic("failed to marshal notify map")
	}
	return bytes.NewReader(buf)
}

func Test_RegisterStatus(t *testing.T) {
	var stats *mockStatusReporter
	m := &MockStore{}
	c := &mockClusterService{}

	s := New("127.0.0.1:0", m, c, nil)

	if err := s.RegisterStatus("foo", stats); err != nil {
		t.Fatalf("failed to register statusReporter: %s", err.Error())
	}

	if err := s.RegisterStatus("foo", stats); err == nil {
		t.Fatal("successfully re-registered statusReporter")
	}
}

func Test_FormRedirect(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}

	s := New("127.0.0.1:0", m, c, nil)
	req := mustNewHTTPRequest("http://qux:4001")

	if rd := s.FormRedirect(req, "http://foo:4001"); rd != "http://foo:4001" {
		t.Fatal("failed to form redirect for simple URL")
	}
}

func Test_FormRedirectParam(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	req := mustNewHTTPRequest("http://qux:4001/db/query?x=y")

	if rd := s.FormRedirect(req, "http://foo:4001"); rd != "http://foo:4001/db/query?x=y" {
		t.Fatal("failed to form redirect for URL")
	}
}

func Test_FormRedirectHTTPS(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	req := mustNewHTTPRequest("http://qux:4001")

	if rd := s.FormRedirect(req, "https://foo:4001"); rd != "https://foo:4001" {
		t.Fatal("failed to form redirect for simple URL")
	}
}

func Test_Nodes(t *testing.T) {
	m := &MockStore{
		leaderAddr: "foo:1234",
	}
	c := &mockClusterService{
		apiAddr: "https://bar:5678",
	}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	client := &http.Client{}
	host := fmt.Sprintf("http://%s", s.Addr().String())
	resp, err := client.Get(host + "/nodes")
	if err != nil {
		t.Fatalf("failed to make nodes request")
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for nodes, got %d", resp.StatusCode)
	}
}

func Test_RootRedirectToStatus(t *testing.T) {
	m := &MockStore{}
	c := &mockClusterService{}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	client := &http.Client{
		CheckRedirect: func(req *http.Request, via []*http.Request) error {
			return http.ErrUseLastResponse
		},
	}
	resp, err := client.Get(fmt.Sprintf("http://%s/", s.Addr().String()))
	if err != nil {
		t.Fatalf("failed to make root request")
	}
	if resp.StatusCode != http.StatusFound {
		t.Fatalf("failed to get expected StatusFound for root, got %d", resp.StatusCode)
	}
	if resp.Header["Location"][0] != "/status" {
		t.Fatalf("received incorrect redirect path")
	}

	resp, err = client.Get(fmt.Sprintf("http://%s", s.Addr().String()))
	if err != nil {
		t.Fatalf("failed to make root request")
	}
	if resp.StatusCode != http.StatusFound {
		t.Fatalf("failed to get expected StatusFound for root, got %d", resp.StatusCode)
	}
	if resp.Header["Location"][0] != "/status" {
		t.Fatalf("received incorrect redirect path")
	}
}

func Test_Readyz(t *testing.T) {
	m := &MockStore{
		leaderAddr: "foo:1234",
	}
	c := &mockClusterService{
		apiAddr: "https://bar:5678",
	}
	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	client := &http.Client{}
	host := fmt.Sprintf("http://%s", s.Addr().String())
	resp, err := client.Get(host + "/readyz")
	if err != nil {
		t.Fatalf("failed to make nodes request")
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for nodes, got %d", resp.StatusCode)
	}

	m.notReady = true
	resp, err = client.Get(host + "/readyz")
	if err != nil {
		t.Fatalf("failed to make nodes request")
	}
	if resp.StatusCode != http.StatusServiceUnavailable {
		t.Fatalf("failed to get expected StatusServiceUnavailable for nodes, got %d", resp.StatusCode)
	}

}

func Test_ForwardingRedirectQuery(t *testing.T) {
	m := &MockStore{
		leaderAddr: "foo:1234",
	}
	m.queryFn = func(qr *command.QueryRequest) ([]*command.QueryRows, error) {
		return nil, store.ErrNotLeader
	}

	c := &mockClusterService{
		apiAddr: "https://bar:5678",
	}
	c.queryFn = func(qr *command.QueryRequest, addr string, timeout time.Duration) ([]*command.QueryRows, error) {
		rows := &command.QueryRows{
			Columns: []string{},
			Types:   []string{},
		}
		return []*command.QueryRows{rows}, nil
	}

	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	// Check queries.
	client := &http.Client{
		CheckRedirect: func(req *http.Request, via []*http.Request) error {
			return http.ErrUseLastResponse
		},
	}
	host := fmt.Sprintf("http://%s", s.Addr().String())

	resp, err := client.Get(host + "/db/query?pretty&timings&q=SELECT%20%2A%20FROM%20foo")
	if err != nil {
		t.Fatalf("failed to make query request")
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for nodes, got %d", resp.StatusCode)
	}

	resp, err = client.Get(host + "/db/query?redirect&pretty&timings&q=SELECT%20%2A%20FROM%20foo")
	if err != nil {
		t.Fatalf("failed to make redirected query request: %s", err)
	}
	if resp.StatusCode != http.StatusMovedPermanently {
		t.Fatalf("failed to get expected StatusMovedPermanently for query, got %d", resp.StatusCode)
	}

	// Check leader failure case.
	m.leaderAddr = ""
	resp, err = client.Get(host + "/db/query?pretty&timings&q=SELECT%20%2A%20FROM%20foo")
	if err != nil {
		t.Fatalf("failed to make query forwarded request")
	}
	if resp.StatusCode != http.StatusServiceUnavailable {
		t.Fatalf("failed to get expected StatusServiceUnavailable for node with no leader, got %d", resp.StatusCode)
	}
}

func Test_ForwardingRedirectExecute(t *testing.T) {
	m := &MockStore{
		leaderAddr: "foo:1234",
	}
	m.executeFn = func(er *command.ExecuteRequest) ([]*command.ExecuteResult, error) {
		return nil, store.ErrNotLeader
	}

	c := &mockClusterService{
		apiAddr: "https://bar:5678",
	}
	c.executeFn = func(er *command.ExecuteRequest, addr string, timeout time.Duration) ([]*command.ExecuteResult, error) {
		result := &command.ExecuteResult{
			LastInsertId: 1234,
			RowsAffected: 5678,
		}
		return []*command.ExecuteResult{result}, nil
	}

	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	// Check executes.
	client := &http.Client{
		CheckRedirect: func(req *http.Request, via []*http.Request) error {
			return http.ErrUseLastResponse
		},
	}
	host := fmt.Sprintf("http://%s", s.Addr().String())

	resp, err := client.Post(host+"/db/execute", "application/json", strings.NewReader(`["Some SQL"]`))
	if err != nil {
		t.Fatalf("failed to make execute request")
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for execute, got %d", resp.StatusCode)
	}

	resp, err = client.Post(host+"/db/execute?redirect", "application/json", strings.NewReader(`["Some SQL"]`))
	if err != nil {
		t.Fatalf("failed to make redirected execute request: %s", err)
	}
	if resp.StatusCode != http.StatusMovedPermanently {
		t.Fatalf("failed to get expected StatusMovedPermanently for execute, got %d", resp.StatusCode)
	}

	// Check leader failure case.
	m.leaderAddr = ""
	resp, err = client.Post(host+"/db/execute", "application/json", strings.NewReader(`["Some SQL"]`))
	if err != nil {
		t.Fatalf("failed to make execute request")
	}
	if resp.StatusCode != http.StatusServiceUnavailable {
		t.Fatalf("failed to get expected StatusServiceUnavailable for node with no leader, got %d", resp.StatusCode)
	}
}

func Test_ForwardingRedirectExecuteQuery(t *testing.T) {
	m := &MockStore{
		leaderAddr: "foo:1234",
	}
	m.requestFn = func(er *command.ExecuteQueryRequest) ([]*command.ExecuteQueryResponse, error) {
		return nil, store.ErrNotLeader
	}

	c := &mockClusterService{
		apiAddr: "https://bar:5678",
	}
	c.requestFn = func(er *command.ExecuteQueryRequest, addr string, timeout time.Duration) ([]*command.ExecuteQueryResponse, error) {
		resp := &command.ExecuteQueryResponse{
			Result: &command.ExecuteQueryResponse_E{
				E: &command.ExecuteResult{
					LastInsertId: 1234,
					RowsAffected: 5678,
				},
			},
		}
		return []*command.ExecuteQueryResponse{resp}, nil
	}

	s := New("127.0.0.1:0", m, c, nil)
	if err := s.Start(); err != nil {
		t.Fatalf("failed to start service")
	}
	defer s.Close()

	// Check ExecuteQuery.
	client := &http.Client{
		CheckRedirect: func(req *http.Request, via []*http.Request) error {
			return http.ErrUseLastResponse
		},
	}
	host := fmt.Sprintf("http://%s", s.Addr().String())

	resp, err := client.Post(host+"/db/request", "application/json", strings.NewReader(`["Some SQL"]`))
	if err != nil {
		t.Fatalf("failed to make ExecuteQuery request")
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("failed to get expected StatusOK for ExecuteQuery, got %d", resp.StatusCode)
	}

	resp, err = client.Post(host+"/db/request?redirect", "application/json", strings.NewReader(`["Some SQL"]`))
	if err != nil {
		t.Fatalf("failed to make redirected ExecuteQuery request: %s", err)
	}
	if resp.StatusCode != http.StatusMovedPermanently {
		t.Fatalf("failed to get expected StatusMovedPermanently for execute, got %d", resp.StatusCode)
	}

	// Check leader failure case.
	m.leaderAddr = ""
	resp, err = client.Post(host+"/db/request", "application/json", strings.NewReader(`["Some SQL"]`))
	if err != nil {
		t.Fatalf("failed to make ExecuteQuery request")
	}
	if resp.StatusCode != http.StatusServiceUnavailable {
		t.Fatalf("failed to get expected StatusServiceUnavailable for node with no leader, got %d", resp.StatusCode)
	}
}

func Test_timeoutQueryParam(t *testing.T) {
	var req http.Request

	defStr := "10s"
	def := mustParseDuration(defStr)
	tests := []struct {
		u   string
		dur string
		err bool
	}{
		{
			u:   "http://localhost:4001/nodes?timeout=5s",
			dur: "5s",
		},
		{
			u:   "http://localhost:4001/nodes?timeout=2m",
			dur: "2m",
		},
		{
			u:   "http://localhost:4001/nodes?x=777&timeout=5s",
			dur: "5s",
		},
		{
			u:   "http://localhost:4001/nodes",
			dur: defStr,
		},
		{
			u:   "http://localhost:4001/nodes?timeout=zdfjkh",
			err: true,
		},
	}

	for _, tt := range tests {
		req.URL = mustURLParse(tt.u)
		timeout, err := timeoutParam(&req, def)
		if err != nil {
			if tt.err {
				// Error is expected, all is OK.
				continue
			}
			t.Fatalf("failed to get timeout as expected: %s", err)
		}
		if timeout != mustParseDuration(tt.dur) {
			t.Fatalf("got wrong timeout, expected %s, got %s", mustParseDuration(tt.dur), timeout)
		}
	}
}

type MockStore struct {
	executeFn   func(er *command.ExecuteRequest) ([]*command.ExecuteResult, error)
	queryFn     func(qr *command.QueryRequest) ([]*command.QueryRows, error)
	requestFn   func(eqr *command.ExecuteQueryRequest) ([]*command.ExecuteQueryResponse, error)
	backupFn    func(br *command.BackupRequest, dst io.Writer) error
	loadChunkFn func(lr *command.LoadChunkRequest) error
	leaderAddr  string
	notReady    bool // Default value is true, easier to test.
}

func (m *MockStore) Execute(er *command.ExecuteRequest) ([]*command.ExecuteResult, error) {
	if m.executeFn != nil {
		return m.executeFn(er)
	}
	return nil, nil
}

func (m *MockStore) Query(qr *command.QueryRequest) ([]*command.QueryRows, error) {
	if m.queryFn != nil {
		return m.queryFn(qr)
	}
	return nil, nil
}

func (m *MockStore) Request(eqr *command.ExecuteQueryRequest) ([]*command.ExecuteQueryResponse, error) {
	if m.requestFn != nil {
		return m.requestFn(eqr)
	}
	return nil, nil
}

func (m *MockStore) Join(jr *command.JoinRequest) error {
	return nil
}

func (m *MockStore) Notify(nr *command.NotifyRequest) error {
	return nil
}

func (m *MockStore) Remove(rn *command.RemoveNodeRequest) error {
	return nil
}

func (m *MockStore) LeaderAddr() (string, error) {
	return m.leaderAddr, nil
}

func (m *MockStore) Ready() bool {
	return !m.notReady
}

func (m *MockStore) Stats() (map[string]interface{}, error) {
	return nil, nil
}

func (m *MockStore) Nodes() ([]*store.Server, error) {
	return nil, nil
}

func (m *MockStore) Backup(br *command.BackupRequest, w io.Writer) error {
	if m.backupFn == nil {
		return nil
	}
	return m.backupFn(br, w)
}

func (m *MockStore) LoadChunk(lc *command.LoadChunkRequest) error {
	if m.loadChunkFn != nil {
		return m.loadChunkFn(lc)
	}
	return nil
}

type mockClusterService struct {
	apiAddr      string
	executeFn    func(er *command.ExecuteRequest, addr string, t time.Duration) ([]*command.ExecuteResult, error)
	queryFn      func(qr *command.QueryRequest, addr string, t time.Duration) ([]*command.QueryRows, error)
	requestFn    func(eqr *command.ExecuteQueryRequest, nodeAddr string, timeout time.Duration) ([]*command.ExecuteQueryResponse, error)
	backupFn     func(br *command.BackupRequest, addr string, t time.Duration, w io.Writer) error
	loadChunkFn  func(lc *command.LoadChunkRequest, addr string, t time.Duration) error
	removeNodeFn func(rn *command.RemoveNodeRequest, nodeAddr string, t time.Duration) error
}

func (m *mockClusterService) GetNodeAPIAddr(a string, t time.Duration) (string, error) {
	return m.apiAddr, nil
}

func (m *mockClusterService) Execute(er *command.ExecuteRequest, addr string, creds *cluster.Credentials, t time.Duration) ([]*command.ExecuteResult, error) {
	if m.executeFn != nil {
		return m.executeFn(er, addr, t)
	}
	return nil, nil
}

func (m *mockClusterService) Query(qr *command.QueryRequest, addr string, creds *cluster.Credentials, t time.Duration) ([]*command.QueryRows, error) {
	if m.queryFn != nil {
		return m.queryFn(qr, addr, t)
	}
	return nil, nil
}

func (m *mockClusterService) Request(eqr *command.ExecuteQueryRequest, nodeAddr string, creds *cluster.Credentials, timeout time.Duration) ([]*command.ExecuteQueryResponse, error) {
	if m.requestFn != nil {
		return m.requestFn(eqr, nodeAddr, timeout)
	}
	return nil, nil
}

func (m *mockClusterService) Backup(br *command.BackupRequest, addr string, creds *cluster.Credentials, t time.Duration, w io.Writer) error {
	if m.backupFn != nil {
		return m.backupFn(br, addr, t, w)
	}
	return nil
}

func (m *mockClusterService) LoadChunk(lc *command.LoadChunkRequest, addr string, creds *cluster.Credentials, t time.Duration) error {
	if m.loadChunkFn != nil {
		return m.loadChunkFn(lc, addr, t)
	}
	return nil
}

func (m *mockClusterService) RemoveNode(rn *command.RemoveNodeRequest, addr string, creds *cluster.Credentials, t time.Duration) error {
	if m.removeNodeFn != nil {
		return m.removeNodeFn(rn, addr, t)
	}
	return nil
}

type mockCredentialStore struct {
	HasPermOK bool
	aaFunc    func(username, password, perm string) bool
}

func (m *mockCredentialStore) AA(username, password, perm string) bool {
	if m == nil {
		return true
	}

	if m.aaFunc != nil {
		return m.aaFunc(username, password, perm)
	}
	return m.HasPermOK
}

func (m *mockClusterService) Stats() (map[string]interface{}, error) {
	return nil, nil
}

type mockStatusReporter struct {
}

func (m *mockStatusReporter) Stats() (map[string]interface{}, error) {
	return nil, nil
}

func mustNewHTTPRequest(url string) *http.Request {
	req, err := http.NewRequest("GET", url, nil)
	if err != nil {
		panic("failed to create HTTP request for testing")
	}
	return req
}

func mustURLParse(s string) *url.URL {
	u, err := url.Parse(s)
	if err != nil {
		panic("failed to URL parse string")
	}
	return u
}

func mustParseDuration(d string) time.Duration {
	if dur, err := time.ParseDuration(d); err != nil {
		panic(fmt.Sprintf("failed to parse duration %s: %s", d, err))
	} else {
		return dur
	}
}

func mustGunzip(b []byte) []byte {
	r, err := gzip.NewReader(bytes.NewBuffer(b))
	if err != nil {
		panic(err)
	}
	defer r.Close()

	dec, err := ioutil.ReadAll(r)
	if err != nil {
		panic(err)
	}

	return dec
}