package main

import (
	"errors"
	"net/http"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"

	"github.com/stretchr/testify/require"
	"go.mau.fi/whatsmeow"
	"go.mau.fi/whatsmeow/proto/waE2E"
	"go.mau.fi/whatsmeow/proto/waWeb"
	"go.mau.fi/whatsmeow/types"
	"go.mau.fi/whatsmeow/types/events"
)

func TestWhatsAppStatusFollowsTheConnection(t *testing.T) {
	dir := t.TempDir()
	whatsappTestSession(t, dir, true)
	clock := newTestClock()
	whatsapp, fake, _ := whatsappStartTest(t, dir, clock)
	daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)

	<-fake.connects
	require.Equal(t, "WhatsApp is linked and not connected yet.", whatsapp.Status())

	require.True(t, fake.Emit(&events.Connected{}))
	require.Equal(t, "WhatsApp is linked and connected since 2026-01-01 12:00.", whatsapp.Status())

	clock.now = clock.now.Add(20 * time.Minute)
	require.True(t, fake.Emit(&events.Disconnected{}))
	clock.now = clock.now.Add(time.Minute)
	require.True(t, fake.Emit(&events.Disconnected{}))
	require.Equal(t, "WhatsApp is linked and disconnected since 2026-01-01 12:20. The last connection started at 2026-01-01 12:00.", whatsapp.Status())
}

func TestWhatsAppStatusOfAFirstConnectionThatFailed(t *testing.T) {
	dir := t.TempDir()
	whatsappTestSession(t, dir, true)
	whatsapp, fake, _ := whatsappStartTest(t, dir, newTestClock())
	daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)

	<-fake.connects
	require.True(t, fake.Emit(&events.Disconnected{}))
	require.Equal(t, "WhatsApp is linked and disconnected since 2026-01-01 12:00.", whatsapp.Status())
}

func TestWhatsAppIsNotLinkedWithoutALinkedDevice(t *testing.T) {
	testCases := []struct {
		name    string
		session func(t *testing.T, dir string)
	}{
		{
			name: "no session file",
			session: func(t *testing.T, dir string) {
			},
		},
		{
			name: "a session of a pairing that did not end",
			session: func(t *testing.T, dir string) {
				whatsappTestSession(t, dir, false)
			},
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			dir := t.TempDir()
			tc.session(t, dir)
			whatsapp, _, _ := whatsappStartTest(t, dir, newTestClock())
			require.Equal(t, "WhatsApp is not linked. Run /whatsapp pair PHONE to link it.", whatsapp.Status())
		})
	}
}

func TestWhatsAppRefusesASessionThatOthersCanRead(t *testing.T) {
	dir := t.TempDir()
	whatsappTestSession(t, dir, true)
	require.NoError(t, os.Chmod(filepath.Join(dir, whatsappDirName, whatsappSessionFileName), 0o644))

	_, err := openWhatsApp(t.Context(), dir, time.Now, whatsappDiscardLog(), whatsappNewClient)
	require.EqualError(t, err, "whatsapp/session.db holds the WhatsApp session, so its mode must be 0600")
}

func TestWhatsAppCommandsAnswerOnlyTheClientThatAsked(t *testing.T) {
	server := newModelFake(t)
	telegram := newTelegramFake(t)
	bot, _ := telegramStartTestBot(t, telegram)
	socket := daemonStartTestWithBot(t, server, bot)
	asking := terminalStartTestClient(t, socket)
	other := terminalStartTestClient(t, socket)
	asking.WaitFor(t, "[connected to OneChat]")
	other.WaitFor(t, "[connected to OneChat]")

	asking.Type("/whatsapp status")
	asking.WaitFor(t, "WhatsApp is not linked.")
	asking.Type(" /whatsapp  unknown ")
	asking.WaitFor(t, whatsappUsage)
	asking.Type("/whatsapp pair 0123")
	asking.WaitFor(t, "PHONE must be the number of your WhatsApp account")

	telegram.Add(TelegramUpdate{
		UpdateID: 1,
		Message:  telegramOwnerMessage("/whatsapp status"),
	})

	telegramWaitForSent(t, telegram, "WhatsApp is not linked. Run /whatsapp pair PHONE to link it.")
	require.Len(t, telegram.Sent(), 1)
	require.Equal(t, "[connected to OneChat]\n", other.Output())
	require.Zero(t, server.Calls())
}

func TestWhatsAppPairsWithACode(t *testing.T) {
	dir := t.TempDir()
	whatsapp, fake, _ := whatsappStartTest(t, dir, newTestClock())
	server := newModelFake(t)
	socket, memory := daemonStartTestWithWhatsApp(t, server, nil, whatsapp)
	asking := terminalStartTestClient(t, socket)
	other := terminalStartTestClient(t, socket)
	asking.WaitFor(t, "[connected to OneChat]")
	other.WaitFor(t, "[connected to OneChat]")

	asking.Type("/whatsapp pair +1 555-000-1111")
	items := <-fake.pairings
	items <- whatsmeow.QRChannelItem{
		Event: whatsmeow.QRChannelEventCode,
	}

	asking.WaitFor(t, whatsappPairSteps+"\n"+whatsappTestCode+"\n")
	require.True(t, fake.Emit(&events.PairSuccess{
		ID:  types.NewADJID(whatsappTestNumber, 0, 1),
		LID: types.NewADJID(whatsappTestLID, 0, 1),
	}))
	items <- whatsmeow.QRChannelSuccess
	asking.WaitFor(t, "WhatsApp is linked to +15550001111.")

	require.Equal(t, []string{whatsappTestNumber}, fake.Phones())
	require.Equal(t, "WhatsApp is linked and not connected yet.", whatsapp.Status())
	require.Equal(t, "[connected to OneChat]\n", other.Output())
	require.Zero(t, server.Calls())
	require.Equal(t, []string{"WhatsApp is linked."}, whatsappTestLogTexts(t, memory))

	info, err := os.Stat(filepath.Join(dir, whatsappDirName))
	require.NoError(t, err)
	require.Equal(t, os.FileMode(0o700), info.Mode().Perm())

	info, err = os.Stat(filepath.Join(dir, whatsappDirName, whatsappSessionFileName))
	require.NoError(t, err)
	require.Equal(t, os.FileMode(0o600), info.Mode().Perm())
}

func TestWhatsAppPairingCodeIsATelegramMessageAlone(t *testing.T) {
	whatsapp, fake, _ := whatsappStartTest(t, t.TempDir(), newTestClock())
	telegram := newTelegramFake(t)
	bot, _ := telegramStartTestBot(t, telegram)
	daemonStartTestWithWhatsApp(t, newModelFake(t), bot, whatsapp)

	telegram.Add(TelegramUpdate{
		UpdateID: 1,
		Message:  telegramOwnerMessage("/whatsapp pair 15550001111"),
	})

	items := <-fake.pairings
	items <- whatsmeow.QRChannelItem{
		Event: whatsmeow.QRChannelEventCode,
	}

	telegramWaitForSent(t, telegram, whatsappPairSteps, whatsappTestCode)
}

func TestWhatsAppPairingEnds(t *testing.T) {
	testCases := []struct {
		name   string
		end    func(items chan whatsmeow.QRChannelItem)
		answer string
	}{
		{
			name: "the code expires",
			end: func(items chan whatsmeow.QRChannelItem) {
				items <- whatsmeow.QRChannelTimeout
			},
			answer: whatsappPairExpired,
		},
		{
			name: "the library closes the pairing",
			end: func(items chan whatsmeow.QRChannelItem) {
				close(items)
			},
			answer: whatsappPairExpired,
		},
		{
			name: "the pairing fails",
			end: func(items chan whatsmeow.QRChannelItem) {
				items <- whatsmeow.QRChannelItem{
					Event: whatsmeow.QRChannelEventError,
					Error: errors.New("bad handshake"),
				}
			},
			answer: "The pairing failed: bad handshake. Run /whatsapp pair PHONE again.",
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			whatsapp, fake, _ := whatsappStartTest(t, t.TempDir(), newTestClock())
			socket, _ := daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
			client := terminalStartTestClient(t, socket)
			client.Type("/whatsapp pair 15550001111")

			items := <-fake.pairings
			items <- whatsmeow.QRChannelItem{
				Event: whatsmeow.QRChannelEventCode,
			}

			client.WaitFor(t, whatsappTestCode)
			tc.end(items)
			client.WaitFor(t, tc.answer)
			require.Equal(t, "WhatsApp is not linked. Run /whatsapp pair PHONE to link it.", whatsapp.Status())
		})
	}
}

func TestWhatsAppNewPairingEndsTheOneBefore(t *testing.T) {
	whatsapp, fake, _ := whatsappStartTest(t, t.TempDir(), newTestClock())
	socket, _ := daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
	client := terminalStartTestClient(t, socket)

	client.Type("/whatsapp pair 15550001111")
	<-fake.pairings
	client.Type("/whatsapp pair 15550002222")
	items := <-fake.pairings
	items <- whatsmeow.QRChannelItem{
		Event: whatsmeow.QRChannelEventCode,
	}

	client.WaitFor(t, whatsappTestCode)
	require.Equal(t, []string{"15550002222"}, fake.Phones())
	require.NotContains(t, client.Output(), "did not start the pairing")
}

func TestWhatsAppPairWhenLinked(t *testing.T) {
	dir := t.TempDir()
	whatsappTestSession(t, dir, true)
	whatsapp, _, _ := whatsappStartTest(t, dir, newTestClock())
	socket, _ := daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
	client := terminalStartTestClient(t, socket)

	client.Type("/whatsapp pair 15550001111")
	client.WaitFor(t, "WhatsApp is linked already. Run /whatsapp unlink first.")
}

func TestWhatsAppUnlink(t *testing.T) {
	testCases := []struct {
		name      string
		logoutErr error
		answer    string
	}{
		{
			name:   "with a logout",
			answer: "WhatsApp is unlinked.",
		},
		{
			name:      "with no logout",
			logoutErr: errors.New("not connected"),
			answer:    "WhatsApp is unlinked here, but the phone did not get the logout. In WhatsApp on your phone, open Linked devices and remove the device.",
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			dir := t.TempDir()
			whatsappTestSession(t, dir, true)
			whatsapp, fake, _ := whatsappStartTest(t, dir, newTestClock())
			fake.logoutErr = tc.logoutErr
			socket, memory := daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
			client := terminalStartTestClient(t, socket)
			<-fake.connects

			client.Type("/whatsapp unlink")
			client.WaitFor(t, tc.answer)
			require.Equal(t, 1, fake.Logouts())
			require.NoFileExists(t, filepath.Join(dir, whatsappDirName, whatsappSessionFileName))
			require.Equal(t, "WhatsApp is not linked. Run /whatsapp pair PHONE to link it.", whatsapp.Status())
			require.Equal(t, []string{"WhatsApp is unlinked."}, whatsappTestLogTexts(t, memory))

			client.Type("/whatsapp unlink")
			client.WaitFor(t, "WhatsApp is not linked.\n")
		})
	}
}

func TestWhatsAppLogoutFromThePhone(t *testing.T) {
	dir := t.TempDir()
	whatsappTestSession(t, dir, true)
	whatsapp, fake, _ := whatsappStartTest(t, dir, newTestClock())
	telegram := newTelegramFake(t)
	bot, _ := telegramStartTestBot(t, telegram)
	socket, memory := daemonStartTestWithWhatsApp(t, newModelFake(t), bot, whatsapp)
	client := terminalStartTestClient(t, socket)
	client.WaitFor(t, "[connected to OneChat]")
	<-fake.connects

	require.True(t, fake.Emit(&events.LoggedOut{}))
	notice := "WhatsApp was unlinked from the phone. Run /whatsapp pair PHONE to link it again."
	client.WaitFor(t, notice)
	telegramWaitForSent(t, telegram, notice)
	require.NoFileExists(t, filepath.Join(dir, whatsappDirName, whatsappSessionFileName))
	require.Equal(t, "WhatsApp is not linked. Run /whatsapp pair PHONE to link it.", whatsapp.Status())
	require.Equal(t, []string{"WhatsApp was unlinked from the phone."}, whatsappTestLogTexts(t, memory))
}

func TestWhatsAppLongDisconnectionGivesOneNotice(t *testing.T) {
	dir := t.TempDir()
	whatsappTestSession(t, dir, true)
	clock := newTestClock()
	whatsapp, fake, _ := whatsappStartTest(t, dir, clock)
	whatsapp.noticeDelay = 50 * time.Millisecond
	socket, _ := daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
	client := terminalStartTestClient(t, socket)
	client.WaitFor(t, "[connected to OneChat]")
	<-fake.connects

	require.True(t, fake.Emit(&events.Connected{}))
	require.True(t, fake.Emit(&events.Disconnected{}))
	require.True(t, fake.Emit(&events.Connected{}))
	time.Sleep(100 * time.Millisecond)
	require.Equal(t, "[connected to OneChat]\n", client.Output())

	clock.now = clock.now.Add(time.Hour)
	require.True(t, fake.Emit(&events.Disconnected{}))
	require.True(t, fake.Emit(&events.Disconnected{}))
	client.WaitFor(t, "WhatsApp is disconnected since 2026-01-01 13:00. OneChat tries again.\n")
	require.True(t, fake.Emit(&events.Disconnected{}))
	time.Sleep(100 * time.Millisecond)

	require.True(t, fake.Emit(&events.Connected{}))
	client.WaitFor(t, "WhatsApp is connected again.\n")
	require.Equal(t, 1, strings.Count(client.Output(), "WhatsApp is disconnected since"))
}

func TestWhatsAppDisconnectionWithNoRetryGivesANoticeAtOnce(t *testing.T) {
	dir := t.TempDir()
	whatsappTestSession(t, dir, true)
	whatsapp, fake, _ := whatsappStartTest(t, dir, newTestClock())
	socket, _ := daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
	client := terminalStartTestClient(t, socket)
	client.WaitFor(t, "[connected to OneChat]")
	<-fake.connects

	require.True(t, fake.Emit(&events.StreamReplaced{}))
	client.WaitFor(t, "WhatsApp is disconnected and does not connect again by itself: stream replaced. Restart the daemon to try again.")
}

func TestWhatsAppLogsNoOwnNumber(t *testing.T) {
	dir := t.TempDir()
	whatsappTestSession(t, dir, true)
	whatsapp, fake, logs := whatsappStartTest(t, dir, newTestClock())
	fake.connectErr = errors.New("no route for " + whatsappTestNumber + "@s.whatsapp.net and " + whatsappTestLID + "@lid")
	daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
	<-fake.connects

	require.Eventually(t, func() bool {
		return logs.String() != ""
	}, 10*time.Second, time.Millisecond)
	require.Equal(t, "connect: no route for OWN@s.whatsapp.net and OWN@lid\n", logs.String())
}

func TestWhatsAppPhone(t *testing.T) {
	testCases := []struct {
		name  string
		phone string
		valid bool
	}{
		{
			name:  "a number with a plus and dashes",
			phone: "+1-555-000-1111",
			valid: true,
		},
		{
			name:  "a number with no country code",
			phone: "0115550001111",
			valid: false,
		},
		{
			name:  "a short number",
			phone: "123456",
			valid: false,
		},
		{
			name:  "a long number",
			phone: "1234567890123456",
			valid: false,
		},
		{
			name:  "a number with letters",
			phone: "1555ABC1111",
			valid: false,
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			_, valid := whatsappPhone(tc.phone)
			require.Equal(t, tc.valid, valid)
		})
	}
}

func TestWhatsAppCommandArgs(t *testing.T) {
	testCases := []struct {
		name  string
		line  string
		args  string
		found bool
	}{
		{
			name:  "a command with its arguments",
			line:  " /whatsapp  pair +1 555 ",
			args:  "pair +1 555",
			found: true,
		},
		{
			name:  "the command alone",
			line:  "/whatsapp",
			args:  "",
			found: true,
		},
		{
			name:  "a word that starts with the command",
			line:  "/whatsappstatus",
			args:  "",
			found: false,
		},
		{
			name:  "a message that names the command",
			line:  "what does /whatsapp status do?",
			args:  "",
			found: false,
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			args, found := whatsappCommandArgs(tc.line)
			require.Equal(t, tc.args, args)
			require.Equal(t, tc.found, found)
		})
	}
}

// whatsappTestLogTexts returns the texts of the messages in the log of memory,
// after the log holds at least one message.
func whatsappTestLogTexts(t *testing.T, memory *Memory) []string {
	t.Helper()

	require.Eventually(t, func() bool {
		return memory.Len() > 0
	}, 10*time.Second, time.Millisecond)

	var texts []string
	for id := range memory.Len() {
		message, err := memory.Message(id)
		require.NoError(t, err)

		texts = append(texts, message.Text)
	}

	return texts
}

func TestWhatsAppPrivateBatchStartsATurnWithAnEmptyReply(t *testing.T) {
	whatsapp, fake := whatsappStartTestLinked(t)
	require.NoError(t, whatsapp.device.Contacts.PutContactName(t.Context(), whatsappTestAna, "Ana", "Ana Souza"))

	server := newModelFake(t)
	server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
		modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("")}, 100, 0, 5))
	}

	telegram := newTelegramFake(t)
	bot, _ := telegramStartTestBot(t, telegram)
	socket, memory := daemonStartTestWithWhatsApp(t, server, bot, whatsapp)
	client := terminalStartTestClient(t, socket)
	client.WaitFor(t, "[connected to OneChat]")
	whatsappTestConnect(t, fake)

	at := time.Date(2026, 1, 1, 12, 0, 0, 0, time.UTC)
	require.True(t, fake.Emit(whatsappTestMessage(whatsappTestAna, whatsappTestAna, "m1", "Are you at home?", at)))
	require.True(t, fake.Emit(whatsappTestMessage(whatsappTestAna, whatsappTestOwn, "m2", "Yes", at)))

	text := "[WhatsApp] Ana Souza, private chat 15550002222@s.whatsapp.net, Thursday 2026-01-01\n12:00 Ana Souza: Are you at home?\n12:00 You: Yes\n" + whatsappBatchEmptyReply
	client.WaitFor(t, text+"\n[working]\n[done]\n")
	require.Equal(t, 1, server.Calls())
	require.Contains(t, string(server.Call(0).raw), "Are you at home?")
	require.Equal(t, []string{text}, whatsappTestLogTexts(t, memory))
	require.Empty(t, telegram.Sent())
	require.Eventually(t, func() bool {
		return len(whatsapp.batches.Closed()) == 0
	}, 10*time.Second, time.Millisecond)
}

func TestWhatsAppGroupTurns(t *testing.T) {
	testCases := []struct {
		name    string
		message func(event *events.Message)
		line    string
		turn    bool
	}{
		{
			name: "plain",
			message: func(event *events.Message) {
			},
			line: "12:00 Bruno Lima: Who brings the cake?",
		},
		{
			name: "mention",
			message: func(event *events.Message) {
				event.Message = &waE2E.Message{
					ExtendedTextMessage: &waE2E.ExtendedTextMessage{
						Text: new("@" + whatsappTestLID + " can you bring the cake? Call " + whatsappTestNumber + "."),
						ContextInfo: &waE2E.ContextInfo{
							MentionedJID: []string{whatsappTestLID + "@lid"},
						},
					},
				}
			},
			line: "12:00 Bruno Lima (mentions you): @you can you bring the cake? Call OWN.",
			turn: true,
		},
		{
			name: "reply",
			message: func(event *events.Message) {
				event.Message = &waE2E.Message{
					ExtendedTextMessage: &waE2E.ExtendedTextMessage{
						Text: new("Who brings the cake?"),
						ContextInfo: &waE2E.ContextInfo{
							Participant: new(whatsappTestOwn.String()),
						},
					},
				}
			},
			line: "12:00 Bruno Lima (replies to you): Who brings the cake?",
			turn: true,
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			whatsapp, fake := whatsappStartTestLinked(t)
			fake.groups = []*types.GroupInfo{
				{
					JID: whatsappTestFamily,
					GroupName: types.GroupName{
						Name: "Family",
					},
				},
			}

			server := newModelFake(t)
			socket, memory := daemonStartTestWithWhatsApp(t, server, nil, whatsapp)
			client := terminalStartTestClient(t, socket)
			client.WaitFor(t, "[connected to OneChat]")
			whatsappTestConnect(t, fake)

			event := whatsappTestMessage(whatsappTestFamily, whatsappTestBruno, "m1", "Who brings the cake?", time.Date(2026, 1, 1, 12, 0, 0, 0, time.UTC))
			event.Info.PushName = "Bruno Lima"
			tc.message(event)
			require.True(t, fake.Emit(event))

			text := "[WhatsApp] Family, group 120363000000000001@g.us, Thursday 2026-01-01\n" + tc.line
			if tc.turn {
				text += "\n" + whatsappBatchEmptyReply
				client.WaitFor(t, "[done]")
				require.Equal(t, 1, server.Calls())
			} else {
				client.WaitFor(t, text)
				time.Sleep(100 * time.Millisecond)
				require.Zero(t, server.Calls())
			}

			require.Equal(t, text, whatsappTestLogTexts(t, memory)[0])
		})
	}
}

func TestWhatsAppTakesOnlyText(t *testing.T) {
	at := time.Date(2026, 1, 1, 12, 0, 0, 0, time.UTC)
	testCases := []struct {
		name   string
		change func(event *events.Message)
	}{
		{
			name: "an edit",
			change: func(event *events.Message) {
				event.IsEdit = true
			},
		},
		{
			name: "old history",
			change: func(event *events.Message) {
				event.SourceWebMsg = &waWeb.WebMessageInfo{}
			},
		},
		{
			name: "a view-once message",
			change: func(event *events.Message) {
				event.IsViewOnce = true
			},
		},
		{
			name: "a disappearing message",
			change: func(event *events.Message) {
				event.IsEphemeral = true
			},
		},
		{
			name: "the chat of the user with itself",
			change: func(event *events.Message) {
				event.Info.Chat = whatsappTestOwn
			},
		},
		{
			name: "a status broadcast",
			change: func(event *events.Message) {
				event.Info.Chat = types.StatusBroadcastJID
			},
		},
		{
			name: "a photo with a caption",
			change: func(event *events.Message) {
				event.Message = &waE2E.Message{
					ImageMessage: &waE2E.ImageMessage{
						Caption: new("look"),
					},
				}
			},
		},
		{
			name: "a text of spaces",
			change: func(event *events.Message) {
				event.Message.Conversation = new("  ")
			},
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			whatsapp, _ := whatsappStartTestLinked(t)
			event := whatsappTestMessage(whatsappTestAna, whatsappTestAna, "m1", "hi", at)
			tc.change(event)
			require.True(t, whatsapp.handle(event))
			require.NoError(t, whatsapp.batches.CloseAll())
			require.Empty(t, whatsapp.batches.Closed())
		})
	}
}

// whatsappStartTestLinked opens a WhatsApp with a linked device in a temporary
// directory, with a quiet time of 50 ms for its batches.
func whatsappStartTestLinked(t *testing.T) (*WhatsApp, *WhatsAppFake) {
	t.Helper()

	dir := t.TempDir()
	whatsappTestSession(t, dir, true)
	whatsapp, fake, _ := whatsappStartTest(t, dir, newTestClock())
	whatsapp.batches.quiet = 50 * time.Millisecond

	return whatsapp, fake
}

func TestWhatsAppCatchupGivesOneTurn(t *testing.T) {
	whatsapp, fake := whatsappStartTestLinked(t)
	server := newModelFake(t)
	socket, memory := daemonStartTestWithWhatsApp(t, server, nil, whatsapp)
	client := terminalStartTestClient(t, socket)
	client.WaitFor(t, "[connected to OneChat]")
	<-fake.connects

	require.True(t, fake.Emit(&events.Connected{}))
	at := time.Date(2026, 1, 1, 8, 0, 0, 0, time.UTC)
	for index, event := range []*events.Message{
		whatsappTestMessage(whatsappTestAna, whatsappTestAna, "m1", "Good morning", at),
		whatsappTestMessage(whatsappTestBruno, whatsappTestBruno, "m2", "Call me", at.Add(time.Hour)),
		whatsappTestMessage(whatsappTestAna, whatsappTestAna, "m3", "Are you there?", at.Add(2*time.Hour)),
	} {
		event.Info.PushName = []string{"Ana", "Bruno", "Ana"}[index]
		require.True(t, fake.Emit(event))
	}

	time.Sleep(100 * time.Millisecond)
	require.Zero(t, memory.Len())

	require.True(t, fake.Emit(&events.OfflineSyncCompleted{}))
	client.WaitFor(t, "[done]")
	require.Equal(t, []string{
		"[WhatsApp] Ana, private chat 15550002222@s.whatsapp.net, Thursday 2026-01-01\n08:00 Ana: Good morning\n" + whatsappBatchEmptyReply,
		"[WhatsApp] Bruno, private chat 15550003333@s.whatsapp.net, Thursday 2026-01-01\n09:00 Bruno: Call me\n" + whatsappBatchEmptyReply,
		"[WhatsApp] Ana, private chat 15550002222@s.whatsapp.net, Thursday 2026-01-01\n10:00 Ana: Are you there?\n" + whatsappBatchEmptyReply,
	}, whatsappTestLogTexts(t, memory)[:3])

	time.Sleep(100 * time.Millisecond)
	require.Equal(t, 1, server.Calls())
	for _, text := range []string{"Good morning", "Call me", "Are you there?"} {
		require.Contains(t, string(server.Call(0).raw), text)
	}
}

func TestWhatsAppCatchupEndsAfterItsLimit(t *testing.T) {
	whatsapp, fake := whatsappStartTestLinked(t)
	whatsapp.catchupLimit = 100 * time.Millisecond
	socket, memory := daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
	client := terminalStartTestClient(t, socket)
	client.WaitFor(t, "[connected to OneChat]")
	<-fake.connects

	require.True(t, fake.Emit(&events.Connected{}))
	require.True(t, fake.Emit(whatsappTestMessage(whatsappTestAna, whatsappTestOwn, "m1", "On my way.", time.Date(2026, 1, 1, 12, 0, 0, 0, time.UTC))))
	client.WaitFor(t, "12:00 You: On my way.")
	require.Len(t, whatsappTestLogTexts(t, memory), 1)
}

func TestWhatsAppBatchesOfTheStateFileWaitForTheCatchup(t *testing.T) {
	dir := t.TempDir()
	whatsappTestSession(t, dir, true)
	before, _, _ := whatsappStartTest(t, dir, newTestClock())
	_, err := before.batches.Add(whatsappTestChat, WhatsAppMessage{
		ID:     "m1",
		Sender: "Ana Souza",
		Time:   time.Date(2026, 1, 1, 12, 0, 0, 0, time.UTC),
		Text:   "Did you see my message?",
	}, time.Now().Add(-time.Hour))
	require.NoError(t, err)

	whatsapp, fake, _ := whatsappStartTest(t, dir, newTestClock())
	socket, memory := daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
	client := terminalStartTestClient(t, socket)
	client.WaitFor(t, "[connected to OneChat]")
	<-fake.connects

	time.Sleep(100 * time.Millisecond)
	require.Zero(t, memory.Len())

	require.True(t, fake.Emit(&events.Connected{}))
	require.True(t, fake.Emit(&events.OfflineSyncCompleted{}))
	client.WaitFor(t, "12:00 Ana Souza: Did you see my message?")
	client.WaitFor(t, "[done]")
}

// whatsappTestConnect waits for the connection of the daemon and gives it the
// events of a connection with an empty catch-up.
func whatsappTestConnect(t *testing.T, fake *WhatsAppFake) {
	t.Helper()

	<-fake.connects
	require.True(t, fake.Emit(&events.Connected{}))
	require.True(t, fake.Emit(&events.OfflineSyncCompleted{}))
}