package service

import (
	"context"
	"crypto/hmac"
	"crypto/sha256"
	"encoding/hex"
	"encoding/json"
	"errors"
	"fmt"
	"testing"
	"time"

	"github.com/redis/go-redis/v9"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"

	"github.com/gochat/gochat/internal/channel"
	"github.com/gochat/gochat/internal/model"
	channelmodel "github.com/gochat/gochat/internal/model/channel"
	"github.com/gochat/gochat/internal/repository"
	"github.com/gochat/gochat/internal/worker"
	wspkg "github.com/gochat/gochat/internal/ws"
	"github.com/gochat/gochat/internal/wsevent"
)

type widgetLifecycleListener struct {
	events []*channel.ChannelEvent
	err    error
}

func (l *widgetLifecycleListener) Name() string { return "widget-lifecycle-test" }

func (l *widgetLifecycleListener) OnEvent(_ context.Context, event *channel.ChannelEvent) error {
	l.events = append(l.events, event)
	return l.err
}

func TestIsGenericShangwutongName(t *testing.T) {
	assert.True(t, isGenericShangwutongName("商务通访客"))
	assert.True(t, isGenericShangwutongName("商务通访客·贵州贵阳"))
	assert.False(t, isGenericShangwutongName("贵州贵阳"))
	assert.False(t, isGenericShangwutongName("张三"))
}

// ========== Test Helpers ==========

// setupWidgetServiceTest creates an in-memory SQLite DB, migrates all models,
// constructs repos + service, and returns them for use in service-level tests.
// mockTypingIndicator is defined in widget_offline_message_test.go (same package).
func setupWidgetServiceTest(t *testing.T) (*gorm.DB, *WidgetService) {
	t.Helper()

	db, err := gorm.Open(sqlite.Open("file::memory:"), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Silent),
	})
	require.NoError(t, err, "failed to open test DB")

	require.NoError(t, db.AutoMigrate(
		&model.Account{},
		&model.Inbox{},
		&model.Contact{},
		&model.ContactInbox{},
		&model.Conversation{},
		&model.Message{},
		&model.Attachment{},
		&model.DirectUpload{},
		&model.WidgetThemeConfig{},
		&model.PreChatForm{},
		&model.WidgetFileUpload{},
		&model.WidgetOfflineMessage{},
		&model.BackgroundJob{},
		&model.CaptainAssistant{},
		&model.CaptainInbox{},
		&model.CaptainPreference{},
		&model.AgentBot{},
		&model.AgentBotInbox{},
		&channelmodel.ChannelAPI{},
	), "failed to auto-migrate models")

	t.Cleanup(func() {
		sqlDB, _ := db.DB()
		sqlDB.Close()
	})

	inboxRepo := repository.NewInboxRepo(db)
	contactRepo := repository.NewContactRepo(db)
	contactInboxRepo := repository.NewContactInboxRepo(db)
	conversationRepo := repository.NewConversationRepo(db)
	messageRepo := repository.NewMessageRepo(db)
	themeConfigRepo := repository.NewWidgetThemeConfigRepo(db)
	preChatFormRepo := repository.NewPreChatFormRepo(db)
	fileUploadRepo := repository.NewWidgetFileUploadRepo(db)
	offlineMsgRepo := repository.NewWidgetOfflineMessageRepo(db)

	svc := NewWidgetService(
		inboxRepo,
		contactRepo,
		contactInboxRepo,
		conversationRepo,
		messageRepo,
		&mockTypingIndicator{},
		themeConfigRepo,
		preChatFormRepo,
		fileUploadRepo,
		offlineMsgRepo,
		nil,
		nil,
		nil,
	)

	return db, svc
}

func TestWidgetService_SendMessageDispatchesCompleteLifecycle(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	seedWidgetInbox(t, db)
	initResp, err := svc.Init(context.Background(), WidgetInitRequest{WebsiteToken: "test_ws_token_123"})
	require.NoError(t, err)

	listener := &widgetLifecycleListener{}
	dispatcher := channel.NewDispatcher()
	dispatcher.Register(listener)
	svc.SetDispatcher(dispatcher)

	resp, err := svc.SendMessage(context.Background(), WidgetSendMessageRequest{
		WidgetToken: initResp.WidgetToken,
		Content:     "hello from widget",
	})
	require.NoError(t, err)
	require.Len(t, listener.events, 2)
	assert.Equal(t, channel.EventConversationCreated, listener.events[0].Type)
	assert.Equal(t, channel.EventMessageCreated, listener.events[1].Type)
	assert.Equal(t, resp.ConversationID, listener.events[1].ConversationID)
	assert.Equal(t, initResp.WidgetToken, listener.events[1].Data["widget_token"])
	assert.IsType(t, &model.Conversation{}, listener.events[1].Data["conversation"])
	assert.IsType(t, &model.Contact{}, listener.events[1].Data["contact"])
	assert.IsType(t, &model.Message{}, listener.events[1].Data["message"])
}

func TestWidgetService_SendMessageReturnsDispatchError(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	seedWidgetInbox(t, db)
	initResp, err := svc.Init(context.Background(), WidgetInitRequest{WebsiteToken: "test_ws_token_123"})
	require.NoError(t, err)

	dispatchErr := errors.New("realtime unavailable")
	dispatcher := channel.NewDispatcher()
	dispatcher.Register(&widgetLifecycleListener{err: dispatchErr})
	svc.SetDispatcher(dispatcher)

	_, err = svc.SendMessage(context.Background(), WidgetSendMessageRequest{
		WidgetToken: initResp.WidgetToken,
		Content:     "hello from widget",
	})
	require.ErrorIs(t, err, dispatchErr)
}

func TestWidgetService_RealtimeFailureDoesNotBlockCaptain(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	account, inbox := seedWidgetInbox(t, db)
	assistant := &model.CaptainAssistant{AccountID: account.ID, Name: "Captain", Status: model.AssistantStatusActive, Config: json.RawMessage(`{}`)}
	require.NoError(t, db.Create(assistant).Error)
	require.NoError(t, db.Create(&model.CaptainInbox{AccountID: account.ID, InboxID: inbox.ID, AssistantID: assistant.ID}).Error)
	require.NoError(t, db.Create(&model.CaptainPreference{AccountID: account.ID, AutoReplyEnabled: true}).Error)

	pool := worker.NewWorkerPoolWithOptions(db, worker.WithBackoff(func(int) time.Duration { return 0 }))
	svc.SetWorkerPool(pool)
	rdb := redis.NewClient(&redis.Options{Addr: "127.0.0.1:1", MaxRetries: -1, DialTimeout: 10 * time.Millisecond})
	t.Cleanup(func() { require.NoError(t, rdb.Close()) })
	publisher := wspkg.NewEventPublisher(nil, nil, wspkg.NewBroadcastRelay(rdb, nil))
	publisher.SetWorkerPool(pool)
	dispatcher := channel.NewDispatcher()
	bridge := wsevent.New(publisher)
	dispatcher.Register(bridge)
	svc.SetDispatcher(dispatcher)
	svc.SetRealtimeEventBridge(bridge)

	initResp, err := svc.Init(context.Background(), WidgetInitRequest{WebsiteToken: "test_ws_token_123"})
	require.NoError(t, err)
	response, err := svc.SendMessage(context.Background(), WidgetSendMessageRequest{WidgetToken: initResp.WidgetToken, Content: "ask captain"})
	require.NoError(t, err)

	var captainJob model.BackgroundJob
	require.NoError(t, db.Where("job_type = ?", TaskTypeCaptainConversationResponseBuilder).First(&captainJob).Error)
	require.Equal(t, model.BackgroundJobStatusQueued, captainJob.Status)
	require.NoError(t, db.Model(&captainJob).Update("scheduled_at", time.Now().Add(time.Hour)).Error)

	processed, err := pool.ProcessOne(context.Background())
	require.True(t, processed)
	require.ErrorContains(t, err, "connect: connection refused")
	var messageCount int64
	require.NoError(t, db.Model(&model.Message{}).Where("id = ?", response.Message.ID).Count(&messageCount).Error)
	require.Equal(t, int64(1), messageCount)
	require.NoError(t, db.First(&captainJob, captainJob.ID).Error)
	require.Equal(t, model.BackgroundJobStatusQueued, captainJob.Status)
	var realtimeJob model.BackgroundJob
	require.NoError(t, db.Where("queue = ? AND last_error != ''", "events").First(&realtimeJob).Error)
	require.Equal(t, model.BackgroundJobStatusRetrying, realtimeJob.Status)
}

func TestWidgetService_RealtimeJobFailureRollsBackMessage(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	seedWidgetInbox(t, db)
	pool := worker.NewWorkerPool(db, nil)
	svc.SetWorkerPool(pool)
	publisher := wspkg.NewEventPublisherLocal(nil, nil)
	publisher.SetWorkerPool(pool)
	bridge := wsevent.New(publisher)
	dispatcher := channel.NewDispatcher()
	dispatcher.Register(bridge)
	svc.SetDispatcher(dispatcher)
	svc.SetRealtimeEventBridge(bridge)

	initResp, err := svc.Init(context.Background(), WidgetInitRequest{WebsiteToken: "test_ws_token_123"})
	require.NoError(t, err)
	failBackgroundJobCreate(t, db)
	_, err = svc.SendMessage(context.Background(), WidgetSendMessageRequest{WidgetToken: initResp.WidgetToken, Content: "must roll back"})
	require.ErrorContains(t, err, "forced background job insert failure")

	var messages, jobs int64
	require.NoError(t, db.Model(&model.Message{}).Where("content = ?", "must roll back").Count(&messages).Error)
	require.NoError(t, db.Model(&model.BackgroundJob{}).Count(&jobs).Error)
	require.Zero(t, messages)
	require.Zero(t, jobs)
}

func TestWidgetService_RealtimeJobsRecoverAfterCommitWithoutRedisWakeup(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	seedWidgetInbox(t, db)
	pool := worker.NewWorkerPool(db, nil)
	svc.SetWorkerPool(pool)
	publisher := wspkg.NewEventPublisherLocal(nil, nil)
	publisher.SetWorkerPool(pool)
	bridge := wsevent.New(publisher)
	dispatcher := channel.NewDispatcher()
	dispatcher.Register(bridge)
	svc.SetDispatcher(dispatcher)
	svc.SetRealtimeEventBridge(bridge)

	initResp, err := svc.Init(context.Background(), WidgetInitRequest{WebsiteToken: "test_ws_token_123"})
	require.NoError(t, err)
	response, err := svc.SendMessage(context.Background(), WidgetSendMessageRequest{WidgetToken: initResp.WidgetToken, Content: "recover me"})
	require.NoError(t, err)

	var queued int64
	require.NoError(t, db.Model(&model.BackgroundJob{}).Where("idempotency_key LIKE ? AND status = ?", "realtime:message.created:%", model.BackgroundJobStatusQueued).Count(&queued).Error)
	require.Equal(t, int64(2), queued)

	sse := wspkg.NewSSERegistry()
	accountEvents := sse.Subscribe("restart", initResp.AccountID, 1)
	restartPool := worker.NewWorkerPool(db, nil)
	restartPublisher := wspkg.NewEventPublisherLocal(nil, sse)
	restartPublisher.SetWorkerPool(restartPool)
	for range 2 {
		processed, processErr := restartPool.ProcessOne(context.Background())
		require.True(t, processed)
		require.NoError(t, processErr)
	}
	select {
	case event := <-accountEvents.Events:
		require.Equal(t, wspkg.EventMessageCreated, event.Type)
	case <-time.After(time.Second):
		t.Fatal("restarted worker did not recover account event")
	}

	var messages, completed int64
	require.NoError(t, db.Model(&model.Message{}).Where("id = ?", response.Message.ID).Count(&messages).Error)
	require.NoError(t, db.Model(&model.BackgroundJob{}).Where("idempotency_key LIKE ? AND status = ?", "realtime:message.created:%", model.BackgroundJobStatusCompleted).Count(&completed).Error)
	require.Equal(t, int64(1), messages)
	require.Equal(t, int64(2), completed)
}

func TestWidgetService_SendMessageUpdatesExistingConversationActivityBeforeDispatch(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	seedWidgetInbox(t, db)
	initResp, err := svc.Init(context.Background(), WidgetInitRequest{WebsiteToken: "test_ws_token_123"})
	require.NoError(t, err)

	oldTimestamp := time.Now().Add(-time.Hour).Unix()
	conversation := &model.Conversation{
		AccountID: initResp.AccountID, InboxID: initResp.InboxID, ContactID: initResp.ContactID,
		ContactInboxID: &initResp.ContactInboxID, Status: string(model.ConversationStatusOpen),
		ChannelType: string(model.InboxChannelTypeWebWidget), Channel: string(model.InboxChannelTypeWebWidget),
		LastActivityAt: &oldTimestamp, LastMessageAt: &oldTimestamp,
	}
	require.NoError(t, db.Create(conversation).Error)

	listener := &widgetLifecycleListener{}
	dispatcher := channel.NewDispatcher()
	dispatcher.Register(listener)
	svc.SetDispatcher(dispatcher)

	resp, err := svc.SendMessage(context.Background(), WidgetSendMessageRequest{
		WidgetToken:    initResp.WidgetToken,
		Content:        "new visitor message",
		ConversationID: &conversation.ID,
	})
	require.NoError(t, err)
	require.Len(t, listener.events, 1)

	wantTimestamp := resp.Message.CreatedAt.Unix()
	var persisted model.Conversation
	require.NoError(t, db.First(&persisted, conversation.ID).Error)
	require.NotNil(t, persisted.LastActivityAt)
	require.NotNil(t, persisted.LastMessageAt)
	assert.Equal(t, wantTimestamp, *persisted.LastActivityAt)
	assert.Equal(t, wantTimestamp, *persisted.LastMessageAt)

	eventConversation, ok := listener.events[0].Data["conversation"].(*model.Conversation)
	require.True(t, ok)
	require.NotNil(t, eventConversation.LastActivityAt)
	require.NotNil(t, eventConversation.LastMessageAt)
	assert.Greater(t, *eventConversation.LastActivityAt, oldTimestamp)
	assert.Equal(t, wantTimestamp, *eventConversation.LastActivityAt)
	assert.Equal(t, wantTimestamp, *eventConversation.LastMessageAt)
}

func TestWidgetService_PublicCreateMessageUpdatesConversationBeforeDispatch(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	_, _, _, _, conversation, displayID, _ := seedPublicMessageTest(t, db, model.ConversationStatusOpen)

	listener := &widgetLifecycleListener{}
	dispatcher := channel.NewDispatcher()
	dispatcher.Register(listener)
	svc.SetDispatcher(dispatcher)

	message, _, _, err := svc.PublicCreateMessage(context.Background(), "public-api", "visitor-source", displayID, PublicMessageRequest{Content: "hello"})
	require.NoError(t, err)
	require.Len(t, listener.events, 1)

	wantTimestamp := message.CreatedAt.Unix()
	var persisted model.Conversation
	require.NoError(t, db.First(&persisted, conversation.ID).Error)
	require.NotNil(t, persisted.LastActivityAt)
	require.NotNil(t, persisted.LastMessageAt)
	assert.Equal(t, wantTimestamp, *persisted.LastActivityAt)
	assert.Equal(t, wantTimestamp, *persisted.LastMessageAt)

	event := listener.events[0]
	assert.Equal(t, channel.EventMessageCreated, event.Type)
	assert.Equal(t, channel.ChannelAPI, event.Channel)
	assert.Equal(t, "visitor-token", event.Data["widget_token"])
	assert.Same(t, message, event.Data["message"])
	assert.IsType(t, &model.Contact{}, event.Data["contact"])
	eventConversation, ok := event.Data["conversation"].(*model.Conversation)
	require.True(t, ok)
	require.NotNil(t, eventConversation.LastActivityAt)
	assert.Equal(t, wantTimestamp, *eventConversation.LastActivityAt)
}

func TestWidgetService_PublicCreateMessageReturnsDispatchError(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	_, _, _, _, _, displayID, _ := seedPublicMessageTest(t, db, model.ConversationStatusOpen)

	dispatchErr := errors.New("realtime unavailable")
	dispatcher := channel.NewDispatcher()
	dispatcher.Register(&widgetLifecycleListener{err: dispatchErr})
	svc.SetDispatcher(dispatcher)

	_, _, _, err := svc.PublicCreateMessage(context.Background(), "public-api", "visitor-source", displayID, PublicMessageRequest{Content: "hello"})
	require.ErrorIs(t, err, dispatchErr)
}

func TestWidgetService_PublicCreateMessageRollsBackSecondAttachmentFailureAndRetries(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	account, _, _, _, conversation, displayID, oldTimestamp := seedPublicMessageTest(t, db, model.ConversationStatusOpen)
	firstUpload := seedWidgetDirectUpload(t, db, account.ID, "upload-one")

	listener := &widgetLifecycleListener{}
	dispatcher := channel.NewDispatcher()
	dispatcher.Register(listener)
	svc.SetDispatcher(dispatcher)
	req := PublicMessageRequest{Content: "hello", AttachmentIDs: []string{firstUpload.UploadUUID, "upload-two"}}

	_, _, _, err := svc.PublicCreateMessage(context.Background(), "public-api", "visitor-source", displayID, req)
	require.Error(t, err)
	assertPublicMessageRollback(t, db, conversation.ID, oldTimestamp, firstUpload.ID)
	assert.Empty(t, listener.events)

	secondUpload := seedWidgetDirectUpload(t, db, account.ID, "upload-two")
	message, _, attachments, err := svc.PublicCreateMessage(context.Background(), "public-api", "visitor-source", displayID, req)
	require.NoError(t, err)
	require.Len(t, attachments, 2)
	assert.Len(t, listener.events, 1)
	var messageCount int64
	require.NoError(t, db.Model(&model.Message{}).Where("conversation_id = ?", conversation.ID).Count(&messageCount).Error)
	assert.Equal(t, int64(1), messageCount)
	for _, uploadID := range []uint{firstUpload.ID, secondUpload.ID} {
		var upload model.DirectUpload
		require.NoError(t, db.First(&upload, uploadID).Error)
		assert.Equal(t, model.DirectUploadStatusCompleted, upload.Status)
	}
	for _, attachment := range attachments {
		assert.Equal(t, message.ID, attachment.MessageID)
	}
}

func TestWidgetService_PublicCreateMessageRollsBackReopenFailureAndRetries(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	_, _, _, _, conversation, displayID, oldTimestamp := seedPublicMessageTest(t, db, model.ConversationStatusResolved)
	require.NoError(t, db.Exec(`CREATE TRIGGER fail_public_reopen BEFORE UPDATE OF status ON conversations
		WHEN NEW.id = `+fmt.Sprint(conversation.ID)+` AND NEW.status = 'open'
		BEGIN SELECT RAISE(FAIL, 'reopen failed'); END`).Error)

	listener := &widgetLifecycleListener{}
	dispatcher := channel.NewDispatcher()
	dispatcher.Register(listener)
	svc.SetDispatcher(dispatcher)
	req := PublicMessageRequest{Content: "reopen me"}

	_, _, _, err := svc.PublicCreateMessage(context.Background(), "public-api", "visitor-source", displayID, req)
	require.Error(t, err)
	assertPublicMessageRollback(t, db, conversation.ID, oldTimestamp, 0)
	assert.Empty(t, listener.events)
	var rolledBack model.Conversation
	require.NoError(t, db.First(&rolledBack, conversation.ID).Error)
	assert.Equal(t, string(model.ConversationStatusResolved), rolledBack.Status)

	require.NoError(t, db.Exec("DROP TRIGGER fail_public_reopen").Error)
	message, reopened, _, err := svc.PublicCreateMessage(context.Background(), "public-api", "visitor-source", displayID, req)
	require.NoError(t, err)
	assert.Equal(t, string(model.ConversationStatusOpen), reopened.Status)
	assert.Equal(t, message.CreatedAt.Unix(), *reopened.LastActivityAt)
	assert.Len(t, listener.events, 1)
	var messageCount int64
	require.NoError(t, db.Model(&model.Message{}).Where("conversation_id = ?", conversation.ID).Count(&messageCount).Error)
	assert.Equal(t, int64(1), messageCount)
}

func TestWidgetService_PublicCreateMessageRollsBackCaptainJobFailureAndRetries(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	account, inbox, _, _, conversation, displayID, oldTimestamp := seedPublicMessageTest(t, db, model.ConversationStatusPending)
	assistant := &model.CaptainAssistant{AccountID: account.ID, Name: "Captain", Status: model.AssistantStatusActive, Config: json.RawMessage(`{}`)}
	require.NoError(t, db.Create(assistant).Error)
	require.NoError(t, db.Create(&model.CaptainInbox{AccountID: account.ID, InboxID: inbox.ID, AssistantID: assistant.ID}).Error)
	require.NoError(t, db.Create(&model.CaptainPreference{AccountID: account.ID, AutoReplyEnabled: true}).Error)
	svc.SetWorkerPool(worker.NewWorkerPool(db))
	upload := seedWidgetDirectUpload(t, db, account.ID, "captain-upload")
	require.NoError(t, db.Exec(`CREATE TRIGGER fail_captain_job BEFORE INSERT ON background_jobs
		WHEN NEW.job_type = '`+TaskTypeCaptainConversationResponseBuilder+`'
		BEGIN SELECT RAISE(FAIL, 'captain enqueue failed'); END`).Error)

	listener := &widgetLifecycleListener{}
	dispatcher := channel.NewDispatcher()
	dispatcher.Register(listener)
	svc.SetDispatcher(dispatcher)
	req := PublicMessageRequest{Content: "ask captain", AttachmentIDs: []string{upload.UploadUUID}}

	_, _, _, err := svc.PublicCreateMessage(context.Background(), "public-api", "visitor-source", displayID, req)
	require.Error(t, err)
	assertPublicMessageRollback(t, db, conversation.ID, oldTimestamp, upload.ID)
	assert.Empty(t, listener.events)
	var rolledBack model.Conversation
	require.NoError(t, db.First(&rolledBack, conversation.ID).Error)
	assert.Equal(t, string(model.ConversationStatusPending), rolledBack.Status)

	require.NoError(t, db.Exec("DROP TRIGGER fail_captain_job").Error)
	message, _, attachments, err := svc.PublicCreateMessage(context.Background(), "public-api", "visitor-source", displayID, req)
	require.NoError(t, err)
	require.Len(t, attachments, 1)
	var retriedUpload model.DirectUpload
	require.NoError(t, db.First(&retriedUpload, upload.ID).Error)
	assert.Equal(t, model.DirectUploadStatusCompleted, retriedUpload.Status)
	assert.Len(t, listener.events, 1)
	var job model.BackgroundJob
	require.NoError(t, db.Where("job_type = ?", TaskTypeCaptainConversationResponseBuilder).First(&job).Error)
	assert.Contains(t, string(job.Payload), fmt.Sprintf(`"message_id":%d`, message.ID))
	var messageCount int64
	require.NoError(t, db.Model(&model.Message{}).Where("conversation_id = ?", conversation.ID).Count(&messageCount).Error)
	assert.Equal(t, int64(1), messageCount)
}

func seedPublicMessageTest(t *testing.T, db *gorm.DB, status model.ConversationStatus) (*model.Account, *model.Inbox, *model.Contact, *model.ContactInbox, *model.Conversation, uint, int64) {
	t.Helper()
	account := &model.Account{Name: "Public API Account", Locale: "en", Status: "active"}
	require.NoError(t, db.Create(account).Error)
	inbox := &model.Inbox{AccountID: account.ID, Name: "API Inbox", ChannelType: "api", ChannelID: 1, Enabled: true}
	require.NoError(t, db.Create(inbox).Error)
	require.NoError(t, db.Create(&channelmodel.ChannelAPI{InboxID: inbox.ID, Identifier: "public-api"}).Error)
	contact := &model.Contact{AccountID: account.ID, Name: "Public Visitor"}
	require.NoError(t, db.Create(contact).Error)
	contactInbox := &model.ContactInbox{ContactID: contact.ID, InboxID: inbox.ID, SourceID: "visitor-source", PubsubToken: "visitor-token"}
	require.NoError(t, db.Create(contactInbox).Error)
	displayID := uint(42)
	oldTimestamp := time.Now().Add(-time.Hour).Unix()
	conversation := &model.Conversation{
		AccountID: account.ID, InboxID: inbox.ID, ContactID: contact.ID, ContactInboxID: &contactInbox.ID,
		DisplayID: &displayID, Status: string(status), ChannelType: "api", Channel: "api",
		LastActivityAt: &oldTimestamp, LastMessageAt: &oldTimestamp,
	}
	require.NoError(t, db.Create(conversation).Error)
	return account, inbox, contact, contactInbox, conversation, displayID, oldTimestamp
}

func seedWidgetDirectUpload(t *testing.T, db *gorm.DB, accountID uint, uploadUUID string) *model.DirectUpload {
	t.Helper()
	upload := &model.DirectUpload{
		UploadUUID: uploadUUID, AccountID: accountID, Status: model.DirectUploadStatusPending,
		Source: model.DirectUploadSourceWidget, OriginalName: uploadUUID + ".txt", FileType: "file",
		FileSize: 10, FileURL: "/uploads/" + uploadUUID, ExpiresAt: time.Now().Add(time.Hour),
	}
	require.NoError(t, db.Create(upload).Error)
	return upload
}

func assertPublicMessageRollback(t *testing.T, db *gorm.DB, conversationID uint, oldTimestamp int64, uploadID uint) {
	t.Helper()
	var messageCount, attachmentCount, jobCount int64
	require.NoError(t, db.Model(&model.Message{}).Where("conversation_id = ?", conversationID).Count(&messageCount).Error)
	require.NoError(t, db.Model(&model.Attachment{}).Count(&attachmentCount).Error)
	require.NoError(t, db.Model(&model.BackgroundJob{}).Count(&jobCount).Error)
	assert.Zero(t, messageCount)
	assert.Zero(t, attachmentCount)
	assert.Zero(t, jobCount)
	var conversation model.Conversation
	require.NoError(t, db.First(&conversation, conversationID).Error)
	require.NotNil(t, conversation.LastActivityAt)
	require.NotNil(t, conversation.LastMessageAt)
	assert.Equal(t, oldTimestamp, *conversation.LastActivityAt)
	assert.Equal(t, oldTimestamp, *conversation.LastMessageAt)
	if uploadID != 0 {
		var upload model.DirectUpload
		require.NoError(t, db.First(&upload, uploadID).Error)
		assert.Equal(t, model.DirectUploadStatusPending, upload.Status)
	}
}

// seedWidgetInbox creates an Account + a web_widget Inbox with a known website_token
// in its ChannelConfig JSON, suitable for Init/SendMessage tests.
func seedWidgetInbox(t *testing.T, db *gorm.DB) (*model.Account, *model.Inbox) {
	t.Helper()

	account := &model.Account{Name: "Widget Test Account", Locale: "en", Status: "active"}
	require.NoError(t, db.Create(account).Error)

	widgetConfig := WebWidgetConfig{
		WebsiteToken:          "test_ws_token_123",
		HMACToken:             "test_hmac_secret",
		WidgetColor:           "#1f93ff",
		WelcomeTitle:          "Hello!",
		WelcomeTagline:        "We are here to help",
		PreChatFieldsEnabled:  true,
		OfflineMessageEnabled: true,
	}
	configJSON, err := json.Marshal(widgetConfig)
	require.NoError(t, err)

	inbox := &model.Inbox{
		AccountID:     account.ID,
		Name:          "Widget Inbox",
		ChannelType:   "web_widget",
		ChannelID:     1,
		Enabled:       true,
		ChannelConfig: string(configJSON),
	}
	require.NoError(t, db.Create(inbox).Error)

	return account, inbox
}

// ========== Init Tests ==========

func TestWidgetService_Init_Success(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	account, inbox := seedWidgetInbox(t, db)

	resp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactName:  "Alice Visitor",
		ContactEmail: "alice@example.com",
	})
	require.NoError(t, err)
	assert.NotNil(t, resp)
	assert.NotEmpty(t, resp.WidgetToken, "widget_token (pubsub_token) must be generated")
	assert.Equal(t, inbox.ID, resp.InboxID)
	assert.Equal(t, account.ID, resp.AccountID)
	assert.NotZero(t, resp.ContactID)
	assert.NotZero(t, resp.ContactInboxID)
	assert.Equal(t, "test_ws_token_123", resp.WidgetConfig.WebsiteToken)
	assert.Equal(t, "#1f93ff", resp.WidgetConfig.WidgetColor)
}

func TestWidgetService_Init_AnonymousVisitor(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	resp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
	})
	require.NoError(t, err)
	assert.NotNil(t, resp)
	assert.Equal(t, inbox.ID, resp.InboxID)
	assert.NotZero(t, resp.ContactID)
}

func TestWidgetService_Init_ExistingContactByEmail(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	account, _ := seedWidgetInbox(t, db)

	// Create an existing contact
	existingContact := &model.Contact{
		AccountID:   account.ID,
		Name:        "Bob Returning",
		Email:       "bob@example.com",
		ContactType: "visitor",
	}
	require.NoError(t, db.Create(existingContact).Error)

	// Init with same email should find the existing contact
	resp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactName:  "Bob Updated",
		ContactEmail: "bob@example.com",
	})
	require.NoError(t, err)
	assert.NotNil(t, resp)
	assert.Equal(t, existingContact.ID, resp.ContactID, "should reuse existing contact")
}

func TestWidgetService_Init_EmptyWebsiteToken(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	resp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "",
	})
	assert.Nil(t, resp)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "website_token is required")
}

func TestWidgetService_Init_InvalidWebsiteToken(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	resp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "nonexistent_token",
	})
	assert.Nil(t, resp)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "invalid website_token")
}

func TestWidgetService_Init_DisabledInbox(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	account := &model.Account{Name: "Disabled Test", Locale: "en", Status: "active"}
	require.NoError(t, db.Create(account).Error)

	widgetConfig := WebWidgetConfig{WebsiteToken: "disabled_ws_token"}
	configJSON, _ := json.Marshal(widgetConfig)

	// Create inbox with Enabled=true (GORM default:true overrides false on Create),
	// then explicitly update to Enabled=false.
	inbox := &model.Inbox{
		AccountID:     account.ID,
		Name:          "Disabled Inbox",
		ChannelType:   "web_widget",
		ChannelID:     1,
		Enabled:       true,
		ChannelConfig: string(configJSON),
	}
	require.NoError(t, db.Create(inbox).Error)
	require.NoError(t, db.Model(inbox).Update("enabled", false).Error)

	resp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "disabled_ws_token",
	})
	assert.Nil(t, resp)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "disabled")
}

func TestWidgetService_Init_ReInitSameContact(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	// First init
	resp1, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactEmail: "reinit@example.com",
	})
	require.NoError(t, err)
	require.NotNil(t, resp1)

	// Second init with same email — should find existing contact and reuse ContactInbox
	resp2, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactEmail: "reinit@example.com",
	})
	require.NoError(t, err)
	assert.NotNil(t, resp2)
	assert.Equal(t, resp1.ContactID, resp2.ContactID, "should reuse same contact")
	assert.Equal(t, resp1.WidgetToken, resp2.WidgetToken, "should reuse same pubsub_token")
}

// ========== SendMessage Tests ==========

func TestWidgetService_SendMessage_NewConversation(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	// Init first to get widget_token
	initResp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactName:  "Sender Visitor",
	})
	require.NoError(t, err)
	require.NotNil(t, initResp)

	// Send message without conversation_id → creates new conversation
	sendResp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: initResp.WidgetToken,
		Content:     "Hello from widget!",
	})
	require.NoError(t, err)
	assert.NotNil(t, sendResp)
	assert.NotZero(t, sendResp.ConversationID)
	assert.Equal(t, "Hello from widget!", sendResp.Message.Content)
	assert.Equal(t, "text", sendResp.Message.ContentType)
	assert.Equal(t, "incoming", sendResp.Message.MessageType)
}

func TestWidgetService_SendMessage_AutomaticCaptainTakeover(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	account, inbox := seedWidgetInbox(t, db)
	assistant := &model.CaptainAssistant{AccountID: account.ID, Name: "Auto", Status: model.AssistantStatusActive, Config: json.RawMessage(`{}`)}
	require.NoError(t, db.Create(assistant).Error)
	require.NoError(t, db.Create(&model.CaptainInbox{AccountID: account.ID, InboxID: inbox.ID, AssistantID: assistant.ID}).Error)
	bot := &model.AgentBot{AccountID: &account.ID, Name: "Auto", BotType: "captain", Config: json.RawMessage(fmt.Sprintf(`{"assistant_id":%d}`, assistant.ID))}
	require.NoError(t, db.Create(bot).Error)
	require.NoError(t, db.Create(&model.AgentBotInbox{AgentBotID: bot.ID, InboxID: inbox.ID, Status: model.AgentBotInboxActive}).Error)
	require.NoError(t, db.Create(&model.CaptainPreference{AccountID: account.ID, AutoReplyEnabled: true}).Error)
	svc.SetWorkerPool(worker.NewWorkerPool(db))

	initResp, err := svc.Init(context.Background(), WidgetInitRequest{WebsiteToken: "test_ws_token_123"})
	require.NoError(t, err)
	response, err := svc.SendMessage(context.Background(), WidgetSendMessageRequest{WidgetToken: initResp.WidgetToken, Content: "automatic takeover"})
	require.NoError(t, err)

	var conversation model.Conversation
	require.NoError(t, db.First(&conversation, response.ConversationID).Error)
	assert.Equal(t, string(model.ConversationStatusPending), conversation.Status)
	require.NotNil(t, conversation.AssigneeAgentBotID)
	assert.Equal(t, bot.ID, *conversation.AssigneeAgentBotID)
	assert.Equal(t, uint(1), conversation.AITakeoverVersion)
	var job model.BackgroundJob
	require.NoError(t, db.Where("job_type = ?", TaskTypeCaptainConversationResponseBuilder).First(&job).Error)
}

func TestWidgetService_SendMessage_AutomaticCaptainTakeoverDoesNotClaimExistingOpenConversation(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	account, inbox := seedWidgetInbox(t, db)
	initResp, err := svc.Init(context.Background(), WidgetInitRequest{WebsiteToken: "test_ws_token_123"})
	require.NoError(t, err)
	first, err := svc.SendMessage(context.Background(), WidgetSendMessageRequest{WidgetToken: initResp.WidgetToken, Content: "before enabling"})
	require.NoError(t, err)

	assistant := &model.CaptainAssistant{AccountID: account.ID, Name: "Auto", Status: model.AssistantStatusActive, Config: json.RawMessage(`{}`)}
	require.NoError(t, db.Create(assistant).Error)
	require.NoError(t, db.Create(&model.CaptainInbox{AccountID: account.ID, InboxID: inbox.ID, AssistantID: assistant.ID}).Error)
	bot := &model.AgentBot{AccountID: &account.ID, Name: "Auto", BotType: "captain", Config: json.RawMessage(fmt.Sprintf(`{"assistant_id":%d}`, assistant.ID))}
	require.NoError(t, db.Create(bot).Error)
	require.NoError(t, db.Create(&model.AgentBotInbox{AgentBotID: bot.ID, InboxID: inbox.ID, Status: model.AgentBotInboxActive}).Error)
	require.NoError(t, db.Create(&model.CaptainPreference{AccountID: account.ID, AutoReplyEnabled: true}).Error)
	svc.SetWorkerPool(worker.NewWorkerPool(db))

	_, err = svc.SendMessage(context.Background(), WidgetSendMessageRequest{WidgetToken: initResp.WidgetToken, ConversationID: &first.ConversationID, Content: "after enabling"})
	require.NoError(t, err)
	var conversation model.Conversation
	require.NoError(t, db.First(&conversation, first.ConversationID).Error)
	assert.Equal(t, string(model.ConversationStatusOpen), conversation.Status)
	assert.Nil(t, conversation.AssigneeAgentBotID)
	var jobCount int64
	require.NoError(t, db.Model(&model.BackgroundJob{}).Where("job_type = ?", TaskTypeCaptainConversationResponseBuilder).Count(&jobCount).Error)
	assert.Zero(t, jobCount)
}

func TestWidgetService_SendMessage_ExistingConversation(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	initResp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
	})
	require.NoError(t, err)

	// Send first message → creates conversation
	firstResp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: initResp.WidgetToken,
		Content:     "First message",
	})
	require.NoError(t, err)

	// Send second message to same conversation
	convID := firstResp.ConversationID
	secondResp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken:    initResp.WidgetToken,
		Content:        "Second message in same conversation",
		ConversationID: &convID,
	})
	require.NoError(t, err)
	assert.Equal(t, convID, secondResp.ConversationID)
	assert.Equal(t, "Second message in same conversation", secondResp.Message.Content)
}

func TestWidgetService_SendMessage_EmptyWidgetToken(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	resp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: "",
		Content:     "test",
	})
	assert.Nil(t, resp)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "widget_token is required")
}

func TestWidgetService_SendMessage_EmptyContent(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	resp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: "some_token",
		Content:     "",
	})
	assert.Nil(t, resp)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "content is required")
}

func TestWidgetService_SendMessage_InvalidWidgetToken(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	resp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: "invalid_token_xyz",
		Content:     "test message",
	})
	assert.Nil(t, resp)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "invalid widget_token")
}

func TestWidgetService_SendMessage_WrongConversationOwner(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	// Init contact A
	initA, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactName:  "Contact A",
	})
	require.NoError(t, err)

	// Init contact B with different email
	initB, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactName:  "Contact B",
		ContactEmail: "contact_b@example.com",
	})
	require.NoError(t, err)

	// Contact A sends message → creates conversation
	msgA, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: initA.WidgetToken,
		Content:     "Message from A",
	})
	require.NoError(t, err)

	// Contact B tries to send to Contact A's conversation → should fail
	convID := msgA.ConversationID
	resp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken:    initB.WidgetToken,
		Content:        "Trying A's conversation",
		ConversationID: &convID,
	})
	assert.Nil(t, resp)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "does not belong to this contact")
}

// ========== GetConversations Tests ==========

func TestWidgetService_GetConversations(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	initResp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
	})
	require.NoError(t, err)

	// Sending without a conversation_id reuses the latest widget conversation,
	// matching Chatwoot widget message behavior.
	firstResp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: initResp.WidgetToken,
		Content:     "Msg 1",
	})
	require.NoError(t, err)
	secondResp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: initResp.WidgetToken,
		Content:     "Msg 2",
	})
	require.NoError(t, err)
	assert.Equal(t, firstResp.ConversationID, secondResp.ConversationID)

	convs, err := svc.GetConversations(ctx, initResp.WidgetToken)
	require.NoError(t, err)
	assert.Len(t, convs, 1)
}

func TestWidgetService_GetConversations_InvalidToken(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	convs, err := svc.GetConversations(ctx, "invalid_token")
	assert.Nil(t, convs)
	assert.Error(t, err)
}

func TestWidgetService_GetLatestMessagesScopesByContactInbox(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()
	seedWidgetInbox(t, db)
	initResp, err := svc.Init(ctx, WidgetInitRequest{WebsiteToken: "test_ws_token_123"})
	require.NoError(t, err)
	owned, err := svc.SendMessage(ctx, WidgetSendMessageRequest{WidgetToken: initResp.WidgetToken, Content: "owned message"})
	require.NoError(t, err)

	otherContactInbox := model.ContactInbox{
		ContactID:   initResp.ContactID,
		InboxID:     initResp.InboxID,
		SourceID:    "other-source",
		PubsubToken: "other-widget-token",
	}
	require.NoError(t, db.Create(&otherContactInbox).Error)
	otherConversation := model.Conversation{
		AccountID:      initResp.AccountID,
		InboxID:        initResp.InboxID,
		ContactID:      initResp.ContactID,
		ContactInboxID: &otherContactInbox.ID,
		Status:         string(model.ConversationStatusOpen),
		ChannelType:    string(channel.ChannelWebWidget),
		Channel:        "web_widget",
	}
	require.NoError(t, db.Create(&otherConversation).Error)
	require.NoError(t, db.Create(&model.Message{
		ConversationID: otherConversation.ID,
		AccountID:      initResp.AccountID,
		InboxID:        initResp.InboxID,
		Content:        "other identity message",
		ContentType:    "text",
		MessageType:    string(model.MessageTypeOutgoing),
	}).Error)

	messages, _, conversation, err := svc.GetLatestConversationMessages(ctx, initResp.WidgetToken, 0, 0)
	require.NoError(t, err)
	require.NotNil(t, conversation)
	assert.Equal(t, owned.ConversationID, conversation.ID)
	require.Len(t, messages, 1)
	assert.Equal(t, "owned message", messages[0].Content)
}

func TestWidgetService_UpdateLastSeenQueuesMessageStatusJob(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)
	initResp, err := svc.Init(ctx, WidgetInitRequest{WebsiteToken: "test_ws_token_123"})
	require.NoError(t, err)

	incoming, err := svc.SendMessage(ctx, WidgetSendMessageRequest{WidgetToken: initResp.WidgetToken, Content: "hello"})
	require.NoError(t, err)
	outgoing := &model.Message{
		AccountID:      incoming.Message.AccountID,
		InboxID:        incoming.Message.InboxID,
		ConversationID: incoming.ConversationID,
		Content:        "reply before last seen",
		MessageType:    "outgoing",
		Status:         string(model.MessageStatusSent),
	}
	outgoing.CreatedAt = time.Now().Add(-time.Minute)
	outgoing.UpdatedAt = outgoing.CreatedAt
	require.NoError(t, db.Create(outgoing).Error)

	wp := worker.NewWorkerPool(db)
	RegisterConversationMaintenanceJobs(wp, db)
	svc.SetWorkerPool(wp)

	conversation, err := svc.UpdateLastSeen(ctx, initResp.WidgetToken)
	require.NoError(t, err)
	require.NotNil(t, conversation.ContactLastSeenAt)

	var job model.BackgroundJob
	require.NoError(t, db.Where("job_type = ? AND queue = ? AND status = ?", TaskTypeConversationUpdateMessageStatus, "deferred", model.BackgroundJobStatusQueued).First(&job).Error)
	assert.Contains(t, string(job.Payload), fmt.Sprintf(`"conversation_id":%d`, outgoing.ConversationID))
}

// ========== GetMessages Tests ==========

func TestWidgetService_GetMessages(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	initResp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
	})
	require.NoError(t, err)

	// Send a message to create a conversation
	sendResp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: initResp.WidgetToken,
		Content:     "Test message for retrieval",
	})
	require.NoError(t, err)

	// Retrieve messages for that conversation
	msgs, total, err := svc.GetMessages(ctx, initResp.WidgetToken, sendResp.ConversationID, 0, 50)
	require.NoError(t, err)
	assert.Equal(t, int64(1), total)
	assert.Len(t, msgs, 1)
	assert.Equal(t, "Test message for retrieval", msgs[0].Content)
}

func TestWidgetService_GetMessages_InvalidToken(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	msgs, total, err := svc.GetMessages(ctx, "invalid_token", 1, 0, 50)
	assert.Nil(t, msgs)
	assert.Zero(t, total)
	assert.Error(t, err)
}

func TestWidgetService_GetMessages_WrongConversationOwner(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	initA, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactName:  "Contact A",
	})
	require.NoError(t, err)

	initB, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactEmail: "contact_b@example.com",
	})
	require.NoError(t, err)

	msgA, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: initA.WidgetToken,
		Content:     "A's message",
	})
	require.NoError(t, err)

	// Contact B tries to read Contact A's conversation
	msgs, total, err := svc.GetMessages(ctx, initB.WidgetToken, msgA.ConversationID, 0, 50)
	assert.Nil(t, msgs)
	assert.Zero(t, total)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "does not belong to this contact")
}

func TestWidgetService_LegacyConversationRequiresUniqueContactInbox(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()
	account, inbox := seedWidgetInbox(t, db)
	contact := &model.Contact{AccountID: account.ID, Name: "Legacy visitor"}
	require.NoError(t, db.Create(contact).Error)
	contactInbox := &model.ContactInbox{ContactID: contact.ID, InboxID: inbox.ID, PubsubToken: "legacy-token"}
	require.NoError(t, db.Create(contactInbox).Error)
	legacy := &model.Conversation{
		AccountID: account.ID, InboxID: inbox.ID, ContactID: contact.ID,
		Status: "open", ChannelType: "web_widget", Channel: "web_widget",
	}
	require.NoError(t, db.Create(legacy).Error)
	require.NoError(t, db.Create(&model.Message{
		AccountID: account.ID, InboxID: inbox.ID, ConversationID: legacy.ID,
		Content: "legacy reply", ContentType: "text", MessageType: "outgoing", Status: "sent",
	}).Error)

	conversations, err := svc.GetConversations(ctx, contactInbox.PubsubToken)
	require.NoError(t, err)
	require.Len(t, conversations, 1)
	assert.Equal(t, legacy.ID, conversations[0].ID)
	_, err = svc.GetConversation(ctx, contactInbox.PubsubToken, legacy.ID)
	require.NoError(t, err)
	messages, _, err := svc.GetMessages(ctx, contactInbox.PubsubToken, legacy.ID, 0, 10)
	require.NoError(t, err)
	require.Len(t, messages, 1)
	conversationID := legacy.ID
	_, err = svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: contactInbox.PubsubToken, ConversationID: &conversationID, Content: "legacy visitor reply",
	})
	require.NoError(t, err)

	require.NoError(t, db.Create(&model.ContactInbox{
		ContactID: contact.ID, InboxID: inbox.ID, PubsubToken: "second-legacy-token",
	}).Error)
	conversations, err = svc.GetConversations(ctx, contactInbox.PubsubToken)
	require.NoError(t, err)
	assert.Empty(t, conversations)
	_, err = svc.GetConversation(ctx, contactInbox.PubsubToken, legacy.ID)
	assert.ErrorIs(t, err, errWidgetConversationOwnership)
	_, _, err = svc.GetMessages(ctx, contactInbox.PubsubToken, legacy.ID, 0, 10)
	assert.ErrorIs(t, err, errWidgetConversationOwnership)
	_, err = svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: contactInbox.PubsubToken, ConversationID: &conversationID, Content: "must fail closed",
	})
	assert.ErrorIs(t, err, errWidgetConversationOwnership)
}

func TestWidgetService_ExplicitConversationEntrypointsRejectSiblingToken(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()
	account, inbox := seedWidgetInbox(t, db)
	contact := &model.Contact{AccountID: account.ID, Name: "Shared contact"}
	require.NoError(t, db.Create(contact).Error)
	owner := &model.ContactInbox{ContactID: contact.ID, InboxID: inbox.ID, PubsubToken: "owner-token"}
	sibling := &model.ContactInbox{ContactID: contact.ID, InboxID: inbox.ID, PubsubToken: "sibling-token"}
	require.NoError(t, db.Create(owner).Error)
	require.NoError(t, db.Create(sibling).Error)
	conversation := &model.Conversation{
		AccountID: account.ID, InboxID: inbox.ID, ContactID: contact.ID, ContactInboxID: &owner.ID,
		Status: "open", ChannelType: "web_widget", Channel: "web_widget",
	}
	require.NoError(t, db.Create(conversation).Error)
	message := &model.Message{
		AccountID: account.ID, InboxID: inbox.ID, ConversationID: conversation.ID,
		Content: "owner only", ContentType: "integrations", MessageType: "outgoing", Status: "sent",
		ContentAttributes: mustJSON(map[string]any{"data": map[string]any{"meeting_id": "meeting-1"}}),
	}
	require.NoError(t, db.Create(message).Error)

	_, err := svc.GetConversation(ctx, sibling.PubsubToken, conversation.ID)
	assert.ErrorIs(t, err, errWidgetConversationOwnership)
	_, _, err = svc.GetMessages(ctx, sibling.PubsubToken, conversation.ID, 0, 10)
	assert.ErrorIs(t, err, errWidgetConversationOwnership)
	err = svc.ToggleTyping(ctx, sibling.PubsubToken, conversation.ID, true)
	assert.ErrorIs(t, err, errWidgetConversationOwnership)
	_, _, err = svc.UpdateMessage(ctx, WidgetMessageUpdate{
		WidgetToken: sibling.PubsubToken, MessageID: message.ID, SubmittedValues: []map[string]any{{"value": "nope"}},
	})
	assert.ErrorIs(t, err, errWidgetConversationOwnership)
	_, err = svc.AddDyteParticipant(ctx, "test_ws_token_123", sibling.PubsubToken, message.ID)
	assert.ErrorIs(t, err, errWidgetConversationOwnership)
	conversationID := conversation.ID
	_, err = svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: sibling.PubsubToken, ConversationID: &conversationID, Content: "nope",
	})
	assert.ErrorIs(t, err, errWidgetConversationOwnership)
}

// ========== GetCableToken Tests ==========

func TestWidgetService_GetCableToken(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	initResp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
	})
	require.NoError(t, err)

	cableResp, err := svc.GetCableToken(ctx, initResp.WidgetToken)
	require.NoError(t, err)
	assert.NotNil(t, cableResp)
	assert.Equal(t, initResp.WidgetToken, cableResp.PubsubToken)
	assert.Equal(t, initResp.ContactID, cableResp.ContactID)
	assert.Equal(t, initResp.InboxID, cableResp.InboxID)
	assert.Equal(t, initResp.AccountID, cableResp.AccountID)
}

func TestWidgetService_GetCableToken_InvalidToken(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	resp, err := svc.GetCableToken(ctx, "invalid_token")
	assert.Nil(t, resp)
	assert.Error(t, err)
}

// ========== UpdateContact Tests ==========

func TestWidgetService_UpdateContact(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	initResp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactName:  "Original Name",
	})
	require.NoError(t, err)

	// Update contact name and email
	contact, err := svc.UpdateContact(ctx, initResp.WidgetToken, "Updated Name", "updated@example.com")
	require.NoError(t, err)
	assert.Equal(t, "Updated Name", contact.Name)
	assert.Equal(t, "updated@example.com", contact.Email)
}

func TestWidgetService_UpdateContact_PartialUpdate(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	initResp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactName:  "Name Only",
		ContactEmail: "nameonly@example.com",
	})
	require.NoError(t, err)

	// Update only the name — email should remain unchanged
	contact, err := svc.UpdateContact(ctx, initResp.WidgetToken, "New Name Only", "")
	require.NoError(t, err)
	assert.Equal(t, "New Name Only", contact.Name)
	assert.Equal(t, "nameonly@example.com", contact.Email, "email should remain unchanged")
}

func TestWidgetService_UpdateContact_InvalidToken(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	contact, err := svc.UpdateContact(ctx, "invalid_token", "name", "email")
	assert.Nil(t, contact)
	assert.Error(t, err)
}

func TestWidgetService_SetUserRequiresHMACWhenMandatory(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)
	config, err := ParseWebWidgetConfig(inbox.ChannelConfig)
	require.NoError(t, err)
	config.HMACMandatory = true
	configJSON, err := json.Marshal(config)
	require.NoError(t, err)
	require.NoError(t, db.Model(inbox).Update("channel_config", string(configJSON)).Error)

	initResp, err := svc.Init(ctx, WidgetInitRequest{WebsiteToken: "test_ws_token_123"})
	require.NoError(t, err)

	resp, err := svc.SetUser(ctx, WidgetSetUserRequest{
		WebsiteToken: "test_ws_token_123",
		WidgetToken:  initResp.WidgetToken,
		Identifier:   "external-123",
	})
	assert.Nil(t, resp)
	require.Error(t, err)
	assert.Contains(t, err.Error(), "HMAC failed")
}

func TestWidgetService_SetUserCustomAttributesWithoutIdentifierSkipsHMAC(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)
	config, err := ParseWebWidgetConfig(inbox.ChannelConfig)
	require.NoError(t, err)
	config.HMACMandatory = true
	configJSON, err := json.Marshal(config)
	require.NoError(t, err)
	require.NoError(t, db.Model(inbox).Update("channel_config", string(configJSON)).Error)

	initResp, err := svc.Init(ctx, WidgetInitRequest{WebsiteToken: "test_ws_token_123"})
	require.NoError(t, err)

	resp, err := svc.SetUser(ctx, WidgetSetUserRequest{
		WebsiteToken:     "test_ws_token_123",
		WidgetToken:      initResp.WidgetToken,
		CustomAttributes: map[string]any{"order_id": "12345"},
	})
	require.NoError(t, err)
	require.NotNil(t, resp)
	attrs := jsonMap(resp.Contact.CustomAttributes)
	assert.Equal(t, "12345", attrs["order_id"])
}

// ========== ToggleTyping Tests ==========

func TestWidgetService_ToggleTyping_On(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	initResp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
	})
	require.NoError(t, err)

	// Create a conversation to toggle typing on
	sendResp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: initResp.WidgetToken,
		Content:     "Starting conversation",
	})
	require.NoError(t, err)

	err = svc.ToggleTyping(ctx, initResp.WidgetToken, sendResp.ConversationID, true)
	assert.NoError(t, err)
}

func TestWidgetService_ToggleTyping_Off(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	initResp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
	})
	require.NoError(t, err)

	sendResp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: initResp.WidgetToken,
		Content:     "Starting conversation",
	})
	require.NoError(t, err)

	err = svc.ToggleTyping(ctx, initResp.WidgetToken, sendResp.ConversationID, false)
	assert.NoError(t, err)
}

func TestWidgetService_ToggleTyping_InvalidToken(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	err := svc.ToggleTyping(ctx, "invalid_token", 1, true)
	assert.Error(t, err)
}

func TestWidgetService_ToggleTyping_WrongConversationOwner(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	seedWidgetInbox(t, db)

	initA, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactName:  "Contact A",
	})
	require.NoError(t, err)

	initB, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
		ContactEmail: "contact_b@example.com",
	})
	require.NoError(t, err)

	msgA, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: initA.WidgetToken,
		Content:     "A's message",
	})
	require.NoError(t, err)

	// Contact B tries to toggle typing on Contact A's conversation
	err = svc.ToggleTyping(ctx, initB.WidgetToken, msgA.ConversationID, true)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "does not belong to this contact")
}

// ========== Theme Config Tests ==========

func TestWidgetService_GetThemeConfig(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// No theme config exists yet → should return nil
	theme, err := svc.GetThemeConfig(ctx, "test_ws_token_123")
	require.NoError(t, err)
	assert.Nil(t, theme, "no custom theme configured → nil")

	// Create a theme config
	newTheme := &model.WidgetThemeConfig{
		InboxID:         inbox.ID,
		PrimaryColor:    "#ff0000",
		BackgroundColor: "#000000",
		TextColor:       "#ffffff",
		FontFamily:      "Arial, sans-serif",
		WidgetPosition:  "left",
	}
	created, err := svc.UpdateThemeConfig(ctx, inbox.ID, newTheme)
	require.NoError(t, err)
	require.NotNil(t, created)

	// Now GetThemeConfig should return it
	theme, err = svc.GetThemeConfig(ctx, "test_ws_token_123")
	require.NoError(t, err)
	assert.NotNil(t, theme)
	assert.Equal(t, "#ff0000", theme.PrimaryColor)
	assert.Equal(t, inbox.ID, theme.InboxID)
}

func TestWidgetService_GetThemeConfigByInboxID(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// No config → nil
	theme, err := svc.GetThemeConfigByInboxID(ctx, inbox.ID)
	require.NoError(t, err)
	assert.Nil(t, theme)

	// Create config
	newTheme := &model.WidgetThemeConfig{
		InboxID:      inbox.ID,
		PrimaryColor: "#00ff00",
	}
	_, err = svc.UpdateThemeConfig(ctx, inbox.ID, newTheme)
	require.NoError(t, err)

	// Now should find it
	theme, err = svc.GetThemeConfigByInboxID(ctx, inbox.ID)
	require.NoError(t, err)
	assert.NotNil(t, theme)
	assert.Equal(t, "#00ff00", theme.PrimaryColor)
}

func TestWidgetService_UpdateThemeConfig_Create(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	config := &model.WidgetThemeConfig{
		InboxID:         inbox.ID,
		PrimaryColor:    "#336699",
		SecondaryColor:  "#996633",
		BackgroundColor: "#f5f5f5",
		TextColor:       "#333333",
		FontFamily:      "Georgia, serif",
		FontSize:        "16px",
		WidgetPosition:  "right",
		WidgetAlignment: "bottom",
		AvatarRadius:    "40%",
		ButtonRadius:    "8px",
		CustomCSS:       "body { margin: 0; }",
	}

	result, err := svc.UpdateThemeConfig(ctx, inbox.ID, config)
	require.NoError(t, err)
	assert.NotNil(t, result)
	assert.Equal(t, inbox.ID, result.InboxID)
	assert.Equal(t, "#336699", result.PrimaryColor)
	assert.NotZero(t, result.ID)
}

func TestWidgetService_UpdateThemeConfig_UpdateExisting(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// Create initial config
	config1 := &model.WidgetThemeConfig{
		InboxID:      inbox.ID,
		PrimaryColor: "#111111",
	}
	created1, err := svc.UpdateThemeConfig(ctx, inbox.ID, config1)
	require.NoError(t, err)

	// Update with different values
	config2 := &model.WidgetThemeConfig{
		InboxID:      inbox.ID,
		PrimaryColor: "#222222",
		FontSize:     "18px",
	}
	updated, err := svc.UpdateThemeConfig(ctx, inbox.ID, config2)
	require.NoError(t, err)
	assert.Equal(t, created1.ID, updated.ID, "same record should be updated")
	assert.Equal(t, "#222222", updated.PrimaryColor)
}

func TestWidgetService_UpdateThemeConfig_InvalidInboxID(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	result, err := svc.UpdateThemeConfig(ctx, 0, &model.WidgetThemeConfig{})
	assert.Nil(t, result)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "inbox_id is required")
}

func TestWidgetService_UpdateThemeConfig_NonWebWidgetInbox(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	account := &model.Account{Name: "Non Widget Account", Locale: "en", Status: "active"}
	require.NoError(t, db.Create(account).Error)

	// Create a non-web_widget inbox
	nonWidgetInbox := &model.Inbox{
		AccountID:   account.ID,
		Name:        "Telegram Inbox",
		ChannelType: "telegram",
		ChannelID:   1,
		Enabled:     true,
	}
	require.NoError(t, db.Create(nonWidgetInbox).Error)

	result, err := svc.UpdateThemeConfig(ctx, nonWidgetInbox.ID, &model.WidgetThemeConfig{})
	assert.Nil(t, result)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "web_widget")
}

func TestWidgetService_DeleteThemeConfig(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// Create config first
	config := &model.WidgetThemeConfig{
		InboxID:      inbox.ID,
		PrimaryColor: "#445566",
	}
	_, err := svc.UpdateThemeConfig(ctx, inbox.ID, config)
	require.NoError(t, err)

	// Delete it
	err = svc.DeleteThemeConfig(ctx, inbox.ID)
	require.NoError(t, err)

	// Verify it's gone
	theme, err := svc.GetThemeConfigByInboxID(ctx, inbox.ID)
	require.NoError(t, err)
	assert.Nil(t, theme)
}

func TestWidgetService_DeleteThemeConfig_InvalidInboxID(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	err := svc.DeleteThemeConfig(ctx, 0)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "inbox_id is required")
}

// ========== Pre-Chat Form Tests ==========

func TestWidgetService_GetPreChatForm(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// No pre-chat form exists → returns a default based on WebWidgetConfig (PreChatFieldsEnabled=true)
	form, err := svc.GetPreChatForm(ctx, "test_ws_token_123")
	require.NoError(t, err)
	// Since PreChatFieldsEnabled=true in our seed config, a default form should be returned
	if form != nil {
		assert.Equal(t, inbox.ID, form.InboxID)
		assert.True(t, form.Enabled)
	}
}

func TestWidgetService_GetPreChatFormByInboxID(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// No form → nil
	form, err := svc.GetPreChatFormByInboxID(ctx, inbox.ID)
	require.NoError(t, err)
	assert.Nil(t, form)

	// Create form
	newForm := &model.PreChatForm{
		InboxID:      inbox.ID,
		Enabled:      true,
		Message:      "Please tell us about yourself",
		RequireName:  true,
		RequireEmail: true,
		RequirePhone: false,
	}
	_, err = svc.UpdatePreChatForm(ctx, inbox.ID, newForm)
	require.NoError(t, err)

	// Now should find it
	form, err = svc.GetPreChatFormByInboxID(ctx, inbox.ID)
	require.NoError(t, err)
	assert.NotNil(t, form)
	assert.Equal(t, "Please tell us about yourself", form.Message)
}

func TestWidgetService_UpdatePreChatForm_Create(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	form := &model.PreChatForm{
		InboxID:         inbox.ID,
		Enabled:         true,
		Message:         "Share your details",
		RequireName:     true,
		RequireEmail:    true,
		RequirePhone:    true,
		ShowPhoneNumber: true,
		ShowCompany:     true,
		ShowCity:        true,
		ShowCountry:     true,
		ConsentEnabled:  true,
		ConsentMessage:  "I agree to the privacy policy",
		ConsentLink:     "https://example.com/privacy",
	}

	result, err := svc.UpdatePreChatForm(ctx, inbox.ID, form)
	require.NoError(t, err)
	assert.NotNil(t, result)
	assert.Equal(t, inbox.ID, result.InboxID)
	assert.True(t, result.Enabled)
	assert.Equal(t, "Share your details", result.Message)
}

func TestWidgetService_UpdatePreChatForm_UpdateExisting(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// Create initial form
	form1 := &model.PreChatForm{
		InboxID:      inbox.ID,
		Enabled:      true,
		Message:      "Original message",
		RequireName:  true,
		RequireEmail: false,
	}
	created1, err := svc.UpdatePreChatForm(ctx, inbox.ID, form1)
	require.NoError(t, err)

	// Update
	form2 := &model.PreChatForm{
		InboxID:      inbox.ID,
		Enabled:      true,
		Message:      "Updated message",
		RequireName:  false,
		RequireEmail: true,
	}
	updated, err := svc.UpdatePreChatForm(ctx, inbox.ID, form2)
	require.NoError(t, err)
	assert.Equal(t, created1.ID, updated.ID)
	assert.Equal(t, "Updated message", updated.Message)
}

func TestWidgetService_UpdatePreChatForm_InvalidInboxID(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	result, err := svc.UpdatePreChatForm(ctx, 0, &model.PreChatForm{})
	assert.Nil(t, result)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "inbox_id is required")
}

func TestWidgetService_DeletePreChatForm(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// Create form first
	form := &model.PreChatForm{
		InboxID: inbox.ID,
		Enabled: true,
		Message: "To be deleted",
	}
	_, err := svc.UpdatePreChatForm(ctx, inbox.ID, form)
	require.NoError(t, err)

	// Delete it
	err = svc.DeletePreChatForm(ctx, inbox.ID)
	require.NoError(t, err)

	// Verify it's gone
	found, err := svc.GetPreChatFormByInboxID(ctx, inbox.ID)
	require.NoError(t, err)
	assert.Nil(t, found)
}

// ========== SubmitPreChatForm Tests ==========

func TestWidgetService_SubmitPreChatForm(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// Enable pre-chat form
	form := &model.PreChatForm{
		InboxID:      inbox.ID,
		Enabled:      true,
		Message:      "Fill this form",
		RequireName:  true,
		RequireEmail: true,
	}
	_, err := svc.UpdatePreChatForm(ctx, inbox.ID, form)
	require.NoError(t, err)

	submission := model.PreChatFormSubmission{
		Name:  "Form Submitter",
		Email: "submitter@example.com",
		Phone: "+15550001111",
	}

	resp, err := svc.SubmitPreChatForm(ctx, "test_ws_token_123", submission)
	require.NoError(t, err)
	assert.NotNil(t, resp)
	assert.NotEmpty(t, resp.WidgetToken)
	assert.Equal(t, inbox.ID, resp.InboxID)
}

func TestWidgetService_SubmitPreChatForm_Disabled(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	account := &model.Account{Name: "No PreChat Account", Locale: "en", Status: "active"}
	require.NoError(t, db.Create(account).Error)

	widgetConfig := WebWidgetConfig{
		WebsiteToken:         "no_prechat_token",
		PreChatFieldsEnabled: false, // disabled
	}
	configJSON, _ := json.Marshal(widgetConfig)

	inbox := &model.Inbox{
		AccountID:     account.ID,
		Name:          "No PreChat Inbox",
		ChannelType:   "web_widget",
		ChannelID:     1,
		Enabled:       true,
		ChannelConfig: string(configJSON),
	}
	require.NoError(t, db.Create(inbox).Error)

	resp, err := svc.SubmitPreChatForm(ctx, "no_prechat_token", model.PreChatFormSubmission{
		Name:  "Visitor",
		Email: "visitor@example.com",
	})
	assert.Nil(t, resp)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "not enabled")
}

// ========== File Upload Tests ==========

func TestWidgetService_CleanupExpiredUploads(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// Create expired uploads directly in DB
	pastTime := time.Now().Add(-48 * time.Hour) // 48 hours ago = expired
	for i := 0; i < 3; i++ {
		upload := &model.WidgetFileUpload{
			UploadUUID:   fmt.Sprintf("expired-uuid-%d", i),
			InboxID:      inbox.ID,
			Status:       model.WidgetFileUploadStatusPending,
			OriginalName: fmt.Sprintf("expired_file_%d.txt", i),
			FileType:     "file",
			MimeType:     "text/plain",
			FileSize:     100,
			FileURL:      fmt.Sprintf("/uploads/expired_%d.txt", i),
			ExpiresAt:    pastTime,
		}
		require.NoError(t, db.Create(upload).Error)
	}

	// Create a non-expired upload (should NOT be cleaned up)
	futureTime := time.Now().Add(24 * time.Hour)
	activeUpload := &model.WidgetFileUpload{
		UploadUUID:   "active-uuid-1",
		InboxID:      inbox.ID,
		Status:       model.WidgetFileUploadStatusPending,
		OriginalName: "active_file.txt",
		FileType:     "file",
		MimeType:     "text/plain",
		FileSize:     200,
		FileURL:      "/uploads/active.txt",
		ExpiresAt:    futureTime,
	}
	require.NoError(t, db.Create(activeUpload).Error)

	// Run cleanup
	affected, err := svc.CleanupExpiredUploads(ctx)
	require.NoError(t, err)
	assert.Equal(t, int64(3), affected, "should delete exactly 3 expired uploads")

	// Verify active upload still exists
	var remaining int64
	db.Model(&model.WidgetFileUpload{}).Where("upload_uuid = ?", "active-uuid-1").Count(&remaining)
	assert.Equal(t, int64(1), remaining, "non-expired upload should remain")
}

func TestWidgetService_CleanupExpiredUploads_NoExpired(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// Only non-expired uploads
	futureTime := time.Now().Add(24 * time.Hour)
	upload := &model.WidgetFileUpload{
		UploadUUID:   "fresh-uuid-1",
		InboxID:      inbox.ID,
		Status:       model.WidgetFileUploadStatusPending,
		OriginalName: "fresh_file.txt",
		FileType:     "file",
		MimeType:     "text/plain",
		FileSize:     50,
		FileURL:      "/uploads/fresh.txt",
		ExpiresAt:    futureTime,
	}
	require.NoError(t, db.Create(upload).Error)

	affected, err := svc.CleanupExpiredUploads(ctx)
	require.NoError(t, err)
	assert.Equal(t, int64(0), affected, "no expired uploads to clean")
}

func TestWidgetService_AttachUploadToMessage(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// Create a pending upload
	futureTime := time.Now().Add(24 * time.Hour)
	upload := &model.WidgetFileUpload{
		UploadUUID:   "attach-uuid-1",
		InboxID:      inbox.ID,
		Status:       model.WidgetFileUploadStatusPending,
		OriginalName: "photo.png",
		FileType:     "image",
		MimeType:     "image/png",
		FileSize:     1024,
		FileURL:      "/uploads/photo.png",
		ExpiresAt:    futureTime,
	}
	require.NoError(t, db.Create(upload).Error)

	// Create a message for attachment
	initResp, err := svc.Init(ctx, WidgetInitRequest{
		WebsiteToken: "test_ws_token_123",
	})
	require.NoError(t, err)

	sendResp, err := svc.SendMessage(ctx, WidgetSendMessageRequest{
		WidgetToken: initResp.WidgetToken,
		Content:     "Check this photo",
	})
	require.NoError(t, err)

	// Attach upload to message
	err = svc.AttachUploadToMessage(ctx, upload.ID, sendResp.Message.ID)
	require.NoError(t, err)

	// Verify upload status changed to "attached"
	var updated model.WidgetFileUpload
	require.NoError(t, db.First(&updated, upload.ID).Error)
	assert.Equal(t, model.WidgetFileUploadStatusAttached, updated.Status)
	assert.NotNil(t, updated.MessageID)
	assert.Equal(t, sendResp.Message.ID, *updated.MessageID)
}

func TestWidgetService_AttachUploadToMessage_AlreadyAttached(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	msgID := uint(999)
	upload := &model.WidgetFileUpload{
		UploadUUID:   "already-attached-uuid",
		InboxID:      inbox.ID,
		Status:       model.WidgetFileUploadStatusAttached,
		OriginalName: "already.png",
		FileType:     "image",
		MimeType:     "image/png",
		FileSize:     500,
		FileURL:      "/uploads/already.png",
		MessageID:    &msgID,
		ExpiresAt:    time.Now().Add(24 * time.Hour),
	}
	require.NoError(t, db.Create(upload).Error)

	err := svc.AttachUploadToMessage(ctx, upload.ID, 1001)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "not in pending status")
}

func TestWidgetService_AttachUploadToMessage_NotFound(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	err := svc.AttachUploadToMessage(ctx, 99999, 1)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "upload not found")
}

// ========== HMAC Verification Tests ==========

func TestVerifyHMAC_Valid(t *testing.T) {
	hmacToken := "secret_key_123"
	identifier := "user@example.com"

	// Compute expected HMAC
	mac := hmac.New(sha256.New, []byte(hmacToken))
	mac.Write([]byte(identifier))
	expectedSig := hex.EncodeToString(mac.Sum(nil))

	result := VerifyHMAC(hmacToken, identifier, expectedSig)
	assert.True(t, result, "valid HMAC should verify successfully")
}

func TestVerifyHMAC_InvalidSignature(t *testing.T) {
	result := VerifyHMAC("secret_key_123", "user@example.com", "wrong_signature_hex")
	assert.False(t, result, "invalid signature should fail verification")
}

func TestVerifyHMAC_EmptyToken(t *testing.T) {
	result := VerifyHMAC("", "user@example.com", "some_sig")
	assert.False(t, result, "empty hmac_token should fail")
}

func TestVerifyHMAC_EmptyIdentifier(t *testing.T) {
	result := VerifyHMAC("secret", "", "some_sig")
	assert.False(t, result, "empty identifier should fail")
}

func TestVerifyHMAC_EmptySignature(t *testing.T) {
	result := VerifyHMAC("secret", "user@example.com", "")
	assert.False(t, result, "empty signature should fail")
}

func TestVerifyHMAC_TamperedIdentifier(t *testing.T) {
	hmacToken := "secret_key_123"
	identifier := "user@example.com"

	mac := hmac.New(sha256.New, []byte(hmacToken))
	mac.Write([]byte(identifier))
	validSig := hex.EncodeToString(mac.Sum(nil))

	// Verify with different identifier but same signature → should fail
	result := VerifyHMAC(hmacToken, "attacker@example.com", validSig)
	assert.False(t, result, "tampered identifier should fail HMAC verification")
}

// ========== ParseWebWidgetConfig Tests ==========

func TestParseWebWidgetConfig_Valid(t *testing.T) {
	configJSON := `{"website_token":"abc","hmac_token":"secret","widget_color":"#1f93ff","welcome_title":"Hi"}`
	config, err := ParseWebWidgetConfig(configJSON)
	require.NoError(t, err)
	assert.Equal(t, "abc", config.WebsiteToken)
	assert.Equal(t, "secret", config.HMACToken)
	assert.Equal(t, "#1f93ff", config.WidgetColor)
}

func TestParseWebWidgetConfig_Empty(t *testing.T) {
	config, err := ParseWebWidgetConfig("")
	assert.Nil(t, config)
	assert.Error(t, err)
}

func TestParseWebWidgetConfig_InvalidJSON(t *testing.T) {
	config, err := ParseWebWidgetConfig("{not json}")
	assert.Nil(t, config)
	assert.Error(t, err)
}

func TestParseWebWidgetConfig_AllowedDomainsType(t *testing.T) {
	tests := []struct {
		name          string
		channelConfig string
		want          string
		wantErr       bool
	}{
		{name: "missing", channelConfig: `{}`, want: ""},
		{name: "empty string", channelConfig: `{"allowed_domains":""}`, want: ""},
		{name: "string", channelConfig: `{"allowed_domains":"https://allowed.example"}`, want: "https://allowed.example"},
		{name: "array", channelConfig: `{"allowed_domains":["https://allowed.example"]}`, wantErr: true},
		{name: "object", channelConfig: `{"allowed_domains":{"domain":"https://allowed.example"}}`, wantErr: true},
		{name: "number", channelConfig: `{"allowed_domains":1}`, wantErr: true},
		{name: "boolean", channelConfig: `{"allowed_domains":true}`, wantErr: true},
		{name: "null", channelConfig: `{"allowed_domains":null}`, wantErr: true},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			config, err := ParseWebWidgetConfig(tt.channelConfig)
			if tt.wantErr {
				assert.Nil(t, config)
				assert.Error(t, err)
				return
			}
			require.NoError(t, err)
			assert.Equal(t, tt.want, config.AllowedDomains)
		})
	}
}

// ========== File Helper Tests ==========

func TestDetectMIMEFromFilename(t *testing.T) {
	assert.Equal(t, "image/png", detectMIMEFromFilename("photo.png"))
	assert.Equal(t, "image/jpeg", detectMIMEFromFilename("pic.jpg"))
	assert.Equal(t, "image/jpeg", detectMIMEFromFilename("pic.jpeg"))
	assert.Equal(t, "image/gif", detectMIMEFromFilename("anim.gif"))
	assert.Equal(t, "image/webp", detectMIMEFromFilename("img.webp"))
	assert.Equal(t, "image/svg+xml", detectMIMEFromFilename("icon.svg"))
	assert.Equal(t, "audio/mpeg", detectMIMEFromFilename("song.mp3"))
	assert.Equal(t, "video/mp4", detectMIMEFromFilename("clip.mp4"))
	assert.Equal(t, "application/pdf", detectMIMEFromFilename("doc.pdf"))
	assert.Equal(t, "text/plain", detectMIMEFromFilename("readme.txt"))
	assert.Equal(t, "text/csv", detectMIMEFromFilename("data.csv"))
	assert.Equal(t, "", detectMIMEFromFilename("unknown.xyz"))
}

func TestCategorizeMIME(t *testing.T) {
	assert.Equal(t, "image", categorizeMIME("image/png"))
	assert.Equal(t, "image", categorizeMIME("image/jpeg"))
	assert.Equal(t, "audio", categorizeMIME("audio/mpeg"))
	assert.Equal(t, "audio", categorizeMIME("audio/ogg"))
	assert.Equal(t, "video", categorizeMIME("video/mp4"))
	assert.Equal(t, "file", categorizeMIME("application/pdf"))
	assert.Equal(t, "file", categorizeMIME("text/plain"))
	assert.Equal(t, "file", categorizeMIME("text/csv"))
	assert.Equal(t, "file", categorizeMIME("application/vnd.ms-excel"))
	assert.Equal(t, "", categorizeMIME("application/unknown"))
}

// ========== InboxByWebsiteToken Tests ==========

func TestWidgetService_GetInboxByWebsiteToken(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	found, err := svc.GetInboxByWebsiteToken(ctx, "test_ws_token_123")
	require.NoError(t, err)
	assert.Equal(t, inbox.ID, found.ID)
	assert.Equal(t, "web_widget", found.ChannelType)
}

func TestWidgetService_GetInboxByWebsiteToken_NotFound(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	found, err := svc.GetInboxByWebsiteToken(ctx, "nonexistent_token")
	assert.Nil(t, found)
	assert.Error(t, err)
}

// ========== ConvertOfflineMessageToConversation Tests ==========

func TestWidgetService_ConvertOfflineMessageToConversation_Success(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// Submit an offline message first
	offlineMsg, err := svc.SubmitOfflineMessage(ctx, inbox.ID, inbox.AccountID, &model.WidgetOfflineMessageSubmission{
		Name:    "Bob Visitor",
		Email:   "bob@example.com",
		Message: "I need help with my order",
	}, "", "")
	require.NoError(t, err)
	assert.Equal(t, model.OfflineStatusPending, offlineMsg.Status)

	// Convert it to a conversation
	conversation, message, err := svc.ConvertOfflineMessageToConversation(ctx, offlineMsg.ID)
	require.NoError(t, err)

	assert.NotZero(t, conversation.ID)
	assert.Equal(t, inbox.AccountID, conversation.AccountID)
	assert.Equal(t, inbox.ID, conversation.InboxID)
	assert.Equal(t, string(model.ConversationStatusOpen), conversation.Status)
	assert.Equal(t, string(model.InboxChannelTypeWebWidget), conversation.ChannelType)

	assert.NotZero(t, message.ID)
	assert.Equal(t, conversation.ID, message.ConversationID)
	assert.Equal(t, offlineMsg.Content, message.Content)
	assert.Equal(t, "text", message.ContentType)
	assert.Equal(t, string(model.MessageTypeIncoming), message.MessageType)
	assert.Equal(t, "contact", message.SenderType)

	// Verify the offline message is now marked as converted
	updatedMsg, err := svc.offlineMessageRepo.FindByID(ctx, offlineMsg.ID)
	require.NoError(t, err)
	assert.Equal(t, model.OfflineStatusConverted, updatedMsg.Status)
	assert.NotNil(t, updatedMsg.ConversationID)
	assert.Equal(t, conversation.ID, *updatedMsg.ConversationID)
}

func TestWidgetService_ConvertOfflineMessageToConversation_NotFound(t *testing.T) {
	_, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	conversation, message, err := svc.ConvertOfflineMessageToConversation(ctx, 99999)
	assert.Nil(t, conversation)
	assert.Nil(t, message)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "offline message not found")
}

func TestWidgetService_ConvertOfflineMessageToConversation_AlreadyConverted(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// Submit an offline message
	offlineMsg, err := svc.SubmitOfflineMessage(ctx, inbox.ID, inbox.AccountID, &model.WidgetOfflineMessageSubmission{
		Name:    "Carol Visitor",
		Email:   "carol@example.com",
		Message: "Question about shipping",
	}, "", "")
	require.NoError(t, err)

	// Convert it once
	conversation, _, err := svc.ConvertOfflineMessageToConversation(ctx, offlineMsg.ID)
	require.NoError(t, err)
	require.NotZero(t, conversation.ID)

	// Try to convert it again — should fail (status is "converted")
	conversation2, message2, err := svc.ConvertOfflineMessageToConversation(ctx, offlineMsg.ID)
	assert.Nil(t, conversation2)
	assert.Nil(t, message2)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "not pending")
}

func TestWidgetService_ConvertOfflineMessageToConversation_DismissedMessage(t *testing.T) {
	db, svc := setupWidgetServiceTest(t)
	ctx := context.Background()

	_, inbox := seedWidgetInbox(t, db)

	// Submit an offline message
	offlineMsg, err := svc.SubmitOfflineMessage(ctx, inbox.ID, inbox.AccountID, &model.WidgetOfflineMessageSubmission{
		Name:    "Dismissed Visitor",
		Message: "This was dismissed",
	}, "", "")
	require.NoError(t, err)

	// Dismiss it first
	err = svc.DismissOfflineMessage(ctx, offlineMsg.ID)
	require.NoError(t, err)

	// Try to convert — should fail (status is "dismissed")
	conversation, message, err := svc.ConvertOfflineMessageToConversation(ctx, offlineMsg.ID)
	assert.Nil(t, conversation)
	assert.Nil(t, message)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "not pending")
}