gochat/backend/internal/service/coverage18_test.go

package service

import (
	"bytes"
	"context"
	"errors"
	"testing"

	"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/search"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"gorm.io/gorm"
)

// ============================================================
// InboxService tests — targeting 0% methods
// ============================================================

func TestInboxService_Create_WebWidget_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Widget Inbox",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)
	assert.NotZero(t, inbox.ID)
	assert.Equal(t, "web_widget", inbox.ChannelType)
	assert.True(t, inbox.Enabled)
}

func TestInboxService_Create_API_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelAPI{})
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "API Inbox",
		ChannelType: "api",
		Enabled:     true,
		Channel:     map[string]any{"webhook_url": "https://example.com/wh"},
	})
	require.NoError(t, err)
	assert.NotZero(t, inbox.ID)
	assert.Equal(t, "api", inbox.ChannelType)
	assert.NotEmpty(t, inbox.Secret)
}

func TestInboxService_Create_Email_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Email Inbox",
		ChannelType: "email",
		Enabled:     true,
		Channel:     map[string]any{"email": "test@example.com"},
	})
	require.NoError(t, err)
	assert.Equal(t, "email", inbox.ChannelType)
}

func TestInboxService_Create_InvalidChannelType_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	_, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Bad",
		ChannelType: "invalid_type",
	})
	require.Error(t, err)
}

func TestInboxService_Create_NameTooShort_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	_, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "A",
		ChannelType: "web_widget",
	})
	require.Error(t, err)
}

func TestInboxService_Create_DefaultName_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)
	assert.Equal(t, "Website", inbox.Name)
}

func TestInboxService_Create_WithGreeting_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	greetingEnabled := true
	greetingMsg := "Hello there!"
	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:            "Greeting Inbox",
		ChannelType:     "web_widget",
		GreetingEnabled: &greetingEnabled,
		GreetingMessage: &greetingMsg,
	})
	require.NoError(t, err)
	assert.True(t, inbox.GreetingEnabled)
	assert.Equal(t, "Hello there!", inbox.GreetingMessage)
}

func TestInboxService_Create_WithWorkingHours_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &model.WorkingHour{})
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "WH Inbox",
		ChannelType: "web_widget",
		Enabled:     true,
		WorkingHours: []repository.WorkingHourUpdateParam{
			{DayOfWeek: 1, ClosedAllDay: false, OpenAllDay: true},
		},
	})
	require.NoError(t, err)
	assert.NotZero(t, inbox.ID)
}

func TestInboxService_GetByAccountAndID_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Test",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	got, err := svc.GetByAccountAndID(context.Background(), 1, inbox.ID)
	require.NoError(t, err)
	assert.Equal(t, inbox.ID, got.ID)
}

func TestInboxService_GetByAccountAndID_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	_, err := svc.GetByAccountAndID(context.Background(), 1, 99999)
	require.Error(t, err)
}

func TestInboxService_Update_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Original",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	enabled := false
	updated, err := svc.Update(context.Background(), 1, inbox.ID, UpdateInboxRequest{
		Name:    "Updated Name",
		Enabled: &enabled,
	})
	require.NoError(t, err)
	assert.Equal(t, "Updated Name", updated.Name)
}

func TestInboxService_Update_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	_, err := svc.Update(context.Background(), 1, 99999, UpdateInboxRequest{
		Name: "X",
	})
	require.Error(t, err)
}

func TestInboxService_Update_WithChannel_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelAPI{})
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "API",
		ChannelType: "api",
		Enabled:     true,
	})
	require.NoError(t, err)

	updated, err := svc.Update(context.Background(), 1, inbox.ID, UpdateInboxRequest{
		Channel: map[string]any{"webhook_url": "https://new.example.com/wh"},
	})
	require.NoError(t, err)
	assert.Equal(t, "https://new.example.com/wh", updated.WebhookURL)
}

func TestInboxService_Delete_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Del",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	err = svc.Delete(context.Background(), inbox.ID)
	require.NoError(t, err)
}

func TestInboxService_DeleteByAccount_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Del",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	err = svc.DeleteByAccount(context.Background(), 1, inbox.ID)
	require.NoError(t, err)
}

func TestInboxService_DeleteByAccount_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	err := svc.DeleteByAccount(context.Background(), 1, 99999)
	require.Error(t, err)
}

func TestInboxService_EnsureCanCreateInbox_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	err := svc.EnsureCanCreateInbox(context.Background(), 1)
	require.NoError(t, err)
}

func TestInboxService_EnsureCanCreateInbox_LimitExceeded_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active", InboxLimit: 1}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	// Create one inbox to fill the limit
	_, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "First",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	err = svc.EnsureCanCreateInbox(context.Background(), 1)
	require.Error(t, err)
	assert.True(t, IsInboxLimitExceeded(err))
}

func TestInboxService_EnsureCanCreateInbox_NilRepo_Cov18(t *testing.T) {
	svc := NewInboxService(nil, nil, nil, nil, nil, nil, nil)
	err := svc.EnsureCanCreateInbox(context.Background(), 1)
	require.NoError(t, err) // nil repo → returns nil
}

func TestInboxService_BindChannel_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Bind",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	updated, err := svc.BindChannel(context.Background(), 1, inbox.ID, 42, map[string]any{"key": "value"})
	require.NoError(t, err)
	assert.Equal(t, uint(42), updated.ChannelID)
}

func TestInboxService_BindChannel_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	_, err := svc.BindChannel(context.Background(), 1, 99999, 42, nil)
	require.Error(t, err)
}

func TestInboxService_CreateWebWidgetInbox_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateWebWidgetInbox(context.Background(), 1, CreateWebWidgetInboxRequest{
		Name:        "Widget",
		WidgetColor: "#ff0000",
	})
	require.NoError(t, err)
	assert.Equal(t, "web_widget", inbox.ChannelType)
	assert.NotEmpty(t, inbox.ChannelConfig)
}

func TestInboxService_GetWebWidgetConfig_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateWebWidgetInbox(context.Background(), 1, CreateWebWidgetInboxRequest{
		Name:        "Widget",
		WidgetColor: "#ff0000",
	})
	require.NoError(t, err)

	config, err := svc.GetWebWidgetConfig(context.Background(), 1, inbox.ID)
	require.NoError(t, err)
	assert.Equal(t, "#ff0000", config.WidgetColor)
}

func TestInboxService_GetWebWidgetConfig_NotWidget_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelAPI{})
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "API",
		ChannelType: "api",
		Enabled:     true,
	})
	require.NoError(t, err)

	_, err = svc.GetWebWidgetConfig(context.Background(), 1, inbox.ID)
	require.Error(t, err)
}

func TestInboxService_UpdateWebWidgetConfig_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateWebWidgetInbox(context.Background(), 1, CreateWebWidgetInboxRequest{
		Name: "Widget",
	})
	require.NoError(t, err)

	newColor := "#00ff00"
	updated, err := svc.UpdateWebWidgetConfig(context.Background(), 1, inbox.ID, UpdateWebWidgetConfigRequest{
		WidgetColor: &newColor,
	})
	require.NoError(t, err)
	assert.NotZero(t, updated.ID)
}

func TestInboxService_CreateTelegramInbox_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateTelegramInbox(context.Background(), 1, CreateTelegramInboxRequest{
		Name:     "Telegram Bot",
		BotToken: "123:abc",
	})
	require.NoError(t, err)
	assert.Equal(t, "telegram", inbox.ChannelType)
}

func TestInboxService_GetTelegramInboxConfig_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateTelegramInbox(context.Background(), 1, CreateTelegramInboxRequest{
		Name:     "Telegram Bot",
		BotToken: "123:abc",
	})
	require.NoError(t, err)

	config, _, err := svc.GetTelegramInboxConfig(context.Background(), 1, inbox.ID)
	require.NoError(t, err)
	assert.Equal(t, "123:abc", config.BotToken)
}

func TestInboxService_UpdateTelegramInbox_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateTelegramInbox(context.Background(), 1, CreateTelegramInboxRequest{
		Name:     "Telegram Bot",
		BotToken: "123:abc",
	})
	require.NoError(t, err)

	newToken := "456:def"
	updated, err := svc.UpdateTelegramInbox(context.Background(), 1, inbox.ID, UpdateTelegramInboxRequest{
		BotToken: &newToken,
	})
	require.NoError(t, err)
	_ = updated
}

func TestInboxService_DeleteTelegramInbox_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateTelegramInbox(context.Background(), 1, CreateTelegramInboxRequest{
		Name:     "Telegram Bot",
		BotToken: "123:abc",
	})
	require.NoError(t, err)

	err = svc.DeleteTelegramInbox(context.Background(), 1, inbox.ID)
	require.NoError(t, err)
}

func TestInboxService_FindTelegramInboxByBotToken_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	_, err := svc.CreateTelegramInbox(context.Background(), 1, CreateTelegramInboxRequest{
		Name:     "Telegram Bot",
		BotToken: "token123",
	})
	require.NoError(t, err)

	inbox, err := svc.FindTelegramInboxByBotToken(context.Background(), "token123")
	require.NoError(t, err)
	assert.Equal(t, "telegram", inbox.ChannelType)
}

func TestInboxService_FindTelegramInboxByBotToken_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	_, err := svc.FindTelegramInboxByBotToken(context.Background(), "nonexistent")
	require.Error(t, err)
}

func TestInboxService_UpdateTelegramConfig_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateTelegramInbox(context.Background(), 1, CreateTelegramInboxRequest{
		Name:     "Bot",
		BotToken: "tok",
	})
	require.NoError(t, err)

	updated, err := svc.UpdateTelegramConfig(context.Background(), 1, inbox.ID, TelegramInboxConfig{
		BotToken:       "newtok",
		WelcomeMessage: "Welcome!",
	})
	require.NoError(t, err)
	_ = updated
}

func TestInboxService_ReauthorizeTelegramInbox_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateTelegramInbox(context.Background(), 1, CreateTelegramInboxRequest{
		Name:     "Bot",
		BotToken: "tok",
	})
	require.NoError(t, err)

	_, err = svc.ReauthorizeTelegramInbox(context.Background(), 1, inbox.ID)
	require.NoError(t, err)
}

func TestInboxService_CreateInstagramInbox_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelInstagram{})
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	igRepo := repository.NewChannelInstagramRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateInstagramInbox(context.Background(), 1, CreateInstagramInboxRequest{
		Name:               "IG Inbox",
		InstagramAccountID: "123456",
		PageAccessToken:    "token",
		ConnectedFBPageID:  "page1",
	}, igRepo)
	require.NoError(t, err)
	assert.Equal(t, "instagram", inbox.ChannelType)
	assert.NotZero(t, inbox.ChannelID)
}

func TestInboxService_GetInstagramInboxConfig_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelInstagram{})
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	igRepo := repository.NewChannelInstagramRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateInstagramInbox(context.Background(), 1, CreateInstagramInboxRequest{
		Name:               "IG Inbox",
		InstagramAccountID: "123456",
		PageAccessToken:    "token",
		ConnectedFBPageID:  "page1",
	}, igRepo)
	require.NoError(t, err)

	config, _, err := svc.GetInstagramInboxConfig(context.Background(), 1, inbox.ID)
	require.NoError(t, err)
	assert.Equal(t, "123456", config.InstagramAccountID)
}

func TestInboxService_UpdateInstagramInbox_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelInstagram{})
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	igRepo := repository.NewChannelInstagramRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateInstagramInbox(context.Background(), 1, CreateInstagramInboxRequest{
		Name:               "IG Inbox",
		InstagramAccountID: "123456",
		PageAccessToken:    "token",
		ConnectedFBPageID:  "page1",
	}, igRepo)
	require.NoError(t, err)

	newName := "Updated IG"
	updated, err := svc.UpdateInstagramInbox(context.Background(), 1, inbox.ID, UpdateInstagramInboxRequest{
		Name: &newName,
	})
	require.NoError(t, err)
	assert.Equal(t, "Updated IG", updated.Name)
}

func TestInboxService_DeleteInstagramInbox_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelInstagram{})
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	igRepo := repository.NewChannelInstagramRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateInstagramInbox(context.Background(), 1, CreateInstagramInboxRequest{
		Name:               "IG Inbox",
		InstagramAccountID: "123456",
		PageAccessToken:    "token",
		ConnectedFBPageID:  "page1",
	}, igRepo)
	require.NoError(t, err)

	err = svc.DeleteInstagramInbox(context.Background(), 1, inbox.ID, igRepo)
	require.NoError(t, err)
}

func TestInboxService_CreateFacebookInbox_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelFacebook{})
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	fbRepo := repository.NewChannelFacebookRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.CreateFacebookInbox(context.Background(), 1, CreateFacebookInboxRequest{
		Name:            "FB Inbox",
		PageID:          "page123",
		PageAccessToken: "token",
	}, fbRepo)
	require.NoError(t, err)
	assert.Equal(t, "facebook", inbox.ChannelType)
}

func TestInboxService_DeleteAvatar_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Test",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	updated, err := svc.DeleteAvatar(context.Background(), 1, inbox.ID)
	require.NoError(t, err)
	assert.Empty(t, updated.AvatarURL)
}

func TestInboxService_DeleteAvatar_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	_, err := svc.DeleteAvatar(context.Background(), 1, 99999)
	require.Error(t, err)
}

func TestInboxService_SetWorkerPool_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)
	svc.SetWorkerPool(nil) // should not panic
}

func TestInboxService_ListCampaigns_InboxNotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	_, err := svc.ListCampaigns(context.Background(), 1, 99999)
	require.Error(t, err)
}

func TestInboxService_Health_NonWhatsApp_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Test",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	_, err = svc.Health(context.Background(), 1, inbox.ID)
	require.Error(t, err)
}

func TestInboxService_SyncTemplates_NonWhatsApp_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Test",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	err = svc.SyncTemplates(context.Background(), 1, inbox.ID)
	require.Error(t, err)
}

func TestInboxService_RegisterWebhook_NonWhatsApp_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	svc := NewInboxService(repo, nil, nil, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Test",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	err = svc.RegisterWebhook(context.Background(), 1, inbox.ID, RegisterWebhookRequest{
		URL: "https://example.com/wh",
	})
	require.Error(t, err)
}

func TestInboxService_SetAgentBot_RemoveBot_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	agentBotInboxRepo := repository.NewAgentBotInboxRepo(db)
	agentBotRepo := repository.NewAgentBotRepo(db)
	svc := NewInboxService(repo, agentBotInboxRepo, agentBotRepo, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Test",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	_, err = svc.SetAgentBot(context.Background(), 1, inbox.ID, SetAgentBotRequest{})
	require.NoError(t, err)
}

func TestInboxService_SetAgentBot_AssignBot_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	agentBotInboxRepo := repository.NewAgentBotInboxRepo(db)
	agentBotRepo := repository.NewAgentBotRepo(db)
	svc := NewInboxService(repo, agentBotInboxRepo, agentBotRepo, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Test",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	bot, err := NewAgentBotService(agentBotRepo).Create(context.Background(), CreateAgentBotRequest{
		Name: "Test Bot",
	})
	require.NoError(t, err)

	binding, err := svc.SetAgentBot(context.Background(), 1, inbox.ID, SetAgentBotRequest{
		AgentBotID: &bot.ID,
	})
	require.NoError(t, err)
	assert.NotNil(t, binding)
}

func TestInboxService_GetAgentBot_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	agentBotInboxRepo := repository.NewAgentBotInboxRepo(db)
	agentBotRepo := repository.NewAgentBotRepo(db)
	svc := NewInboxService(repo, agentBotInboxRepo, agentBotRepo, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Test",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	// No bot assigned → returns nil, nil
	bot, err := svc.GetAgentBot(context.Background(), 1, inbox.ID)
	require.NoError(t, err)
	assert.Nil(t, bot)
}

func TestInboxService_GetAgentBot_WithBot_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewInboxRepo(db)
	agentBotInboxRepo := repository.NewAgentBotInboxRepo(db)
	agentBotRepo := repository.NewAgentBotRepo(db)
	svc := NewInboxService(repo, agentBotInboxRepo, agentBotRepo, nil, nil, nil, nil)

	inbox, err := svc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Test",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)

	bot, err := NewAgentBotService(agentBotRepo).Create(context.Background(), CreateAgentBotRequest{
		Name: "Bot",
	})
	require.NoError(t, err)

	_, err = svc.SetAgentBot(context.Background(), 1, inbox.ID, SetAgentBotRequest{
		AgentBotID: &bot.ID,
	})
	require.NoError(t, err)

	gotBot, err := svc.GetAgentBot(context.Background(), 1, inbox.ID)
	require.NoError(t, err)
	assert.NotNil(t, gotBot)
}

// ============================================================
// ConversationService tests — targeting 0% methods
// ============================================================

func setupConvServiceCov18(t *testing.T) (*ConversationService, *gorm.DB) {
	t.Helper()
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	require.NoError(t, db.Create(&model.Inbox{AccountID: 1, Name: "Inbox", ChannelType: "web_widget", Enabled: true}).Error)
	require.NoError(t, db.Create(&model.Contact{AccountID: 1, Name: "Contact"}).Error)
	convRepo := repository.NewConversationRepo(db)
	msgRepo := repository.NewMessageRepo(db)
	dispatcher := channel.NewDispatcher()
	svc := NewConversationService(convRepo, msgRepo, dispatcher, nil, nil, nil, nil)
	return svc, db
}

func TestConversationService_Create_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)
	assert.NotZero(t, conv.ID)
	assert.Equal(t, "open", conv.Status)
}

func TestConversationService_Create_WithMessage_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:        1,
		ContactID:      1,
		MessageContent: "Hello!",
		MessageType:    "outgoing",
	})
	require.NoError(t, err)
	assert.NotZero(t, conv.ID)
}

func TestConversationService_Create_WithPriority_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
		Priority:  "urgent",
	})
	require.NoError(t, err)
	assert.Equal(t, "urgent", conv.Priority)
}

func TestConversationService_Create_WithStatus_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
		Status:    "pending",
	})
	require.NoError(t, err)
	assert.Equal(t, "pending", conv.Status)
}

func TestConversationService_GetByID_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	got, err := svc.GetByID(context.Background(), conv.ID)
	require.NoError(t, err)
	assert.Equal(t, conv.ID, got.ID)
}

func TestConversationService_GetByID_NotFound_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.GetByID(context.Background(), 99999)
	require.Error(t, err)
}

func TestConversationService_GetByAccountAndID_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	got, err := svc.GetByAccountAndID(context.Background(), 1, conv.ID)
	require.NoError(t, err)
	assert.Equal(t, conv.ID, got.ID)
}

func TestConversationService_GetByAccountAndID_NotFound_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.GetByAccountAndID(context.Background(), 1, 99999)
	require.Error(t, err)
}

func TestConversationService_ListByAccount_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	convs, total, err := svc.ListByAccount(context.Background(), 1, 0, 10)
	require.NoError(t, err)
	assert.Equal(t, int64(1), total)
	assert.Len(t, convs, 1)
}

func TestConversationService_ListByInbox_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	convs, total, err := svc.ListByInbox(context.Background(), 1, 1, 0, 10)
	require.NoError(t, err)
	assert.Equal(t, int64(1), total)
	assert.Len(t, convs, 1)
}

func TestConversationService_ListByStatus_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
		Status:    "open",
	})
	require.NoError(t, err)

	convs, total, err := svc.ListByStatus(context.Background(), 1, "open", 0, 10)
	require.NoError(t, err)
	assert.Equal(t, int64(1), total)
	assert.Len(t, convs, 1)
}

func TestConversationService_Update_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	updated, err := svc.Update(context.Background(), 1, conv.ID, UpdateConversationRequest{
		Status: "resolved",
	})
	require.NoError(t, err)
	assert.Equal(t, "resolved", updated.Status)
}

func TestConversationService_Update_Priority_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	updated, err := svc.Update(context.Background(), 1, conv.ID, UpdateConversationRequest{
		Priority: "high",
	})
	require.NoError(t, err)
	assert.Equal(t, "high", updated.Priority)
}

func TestConversationService_Update_NotFound_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.Update(context.Background(), 1, 99999, UpdateConversationRequest{
		Status: "resolved",
	})
	require.Error(t, err)
}

func TestConversationService_Delete_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	err = svc.Delete(context.Background(), 1, conv.ID)
	require.NoError(t, err)
}

func TestConversationService_Delete_NotFound_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	err := svc.Delete(context.Background(), 1, 99999)
	require.Error(t, err)
}

func TestConversationService_Mute_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	muted, err := svc.Mute(context.Background(), 1, conv.ID)
	require.NoError(t, err)
	assert.True(t, muted.Muted)
	assert.Equal(t, "resolved", muted.Status)
}

func TestConversationService_Mute_NotFound_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.Mute(context.Background(), 1, 99999)
	require.Error(t, err)
}

func TestConversationService_Unmute_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	_, err = svc.Mute(context.Background(), 1, conv.ID)
	require.NoError(t, err)

	unmuted, err := svc.Unmute(context.Background(), 1, conv.ID)
	require.NoError(t, err)
	assert.False(t, unmuted.Muted)
}

func TestConversationService_Unmute_NotFound_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.Unmute(context.Background(), 1, 99999)
	require.Error(t, err)
}

func TestConversationService_ToggleStatus_OpenToResolved_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	updated, err := svc.ToggleStatus(context.Background(), 1, conv.ID, ToggleStatusRequest{
		Status: "resolved",
	})
	require.NoError(t, err)
	assert.Equal(t, "resolved", updated.Status)
}

func TestConversationService_ToggleStatus_ResolvedToOpen_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
		Status:    "resolved",
	})
	require.NoError(t, err)

	updated, err := svc.ToggleStatus(context.Background(), 1, conv.ID, ToggleStatusRequest{
		Status: "open",
	})
	require.NoError(t, err)
	assert.Equal(t, "open", updated.Status)
}

func TestConversationService_ToggleStatus_EmptyStatus_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	updated, err := svc.ToggleStatus(context.Background(), 1, conv.ID, ToggleStatusRequest{})
	require.NoError(t, err)
	assert.Equal(t, "resolved", updated.Status) // open → resolved
}

func TestConversationService_ToggleStatus_NotFound_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.ToggleStatus(context.Background(), 1, 99999, ToggleStatusRequest{
		Status: "resolved",
	})
	require.Error(t, err)
}

func TestConversationService_ToggleStatus_Snoozed_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	until := int64(9999999999)
	updated, err := svc.ToggleStatus(context.Background(), 1, conv.ID, ToggleStatusRequest{
		Status:       "snoozed",
		SnoozedUntil: &until,
	})
	require.NoError(t, err)
	assert.Equal(t, "snoozed", updated.Status)
}

func TestConversationService_UpdatePriority_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	updated, err := svc.UpdatePriority(context.Background(), 1, conv.ID, "urgent")
	require.NoError(t, err)
	assert.Equal(t, "urgent", updated.Priority)
}

func TestConversationService_UpdatePriority_Empty_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	updated, err := svc.UpdatePriority(context.Background(), 1, conv.ID, "")
	require.NoError(t, err)
	assert.Equal(t, "none", updated.Priority)
}

func TestConversationService_UpdatePriority_Invalid_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	_, err = svc.UpdatePriority(context.Background(), 1, conv.ID, "invalid")
	require.Error(t, err)
}

func TestConversationService_UpdatePriority_NotFound_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.UpdatePriority(context.Background(), 1, 99999, "urgent")
	require.Error(t, err)
}

func TestConversationService_UpdateLabels_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	updated, err := svc.UpdateLabels(context.Background(), 1, conv.ID, []string{"support", "bug"})
	require.NoError(t, err)
	assert.Contains(t, updated.Labels, "support")
}

func TestConversationService_UpdateLabels_NotFound_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.UpdateLabels(context.Background(), 1, 99999, []string{"label"})
	require.Error(t, err)
}

func TestConversationService_UnassignAgent_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	// Without dispatcher, accountUserRepo, inboxMemberSvc — unassign (id=0) should work
	updated, err := svc.UnassignAgent(context.Background(), 1, conv.ID)
	require.NoError(t, err)
	_ = updated
}

func TestConversationService_AssignAgentBot_RemoveBot_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	_, _, err = svc.AssignAgentBot(context.Background(), 1, conv.ID, 0)
	require.NoError(t, err)
}

func TestConversationService_ListMessages_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	msgs, total, err := svc.ListMessages(context.Background(), conv.ID, 0, 10)
	require.NoError(t, err)
	assert.Equal(t, int64(0), total)
	assert.Empty(t, msgs)
}

func TestConversationService_ListRecentByContact_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	convs, err := svc.ListRecentByContact(context.Background(), 1, 1, nil, 10)
	require.NoError(t, err)
	assert.Len(t, convs, 1)
}

func TestConversationService_ListUnassigned_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	_, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	convs, total, err := svc.ListUnassigned(context.Background(), 1, 0, 10)
	require.NoError(t, err)
	assert.Equal(t, int64(1), total)
	assert.Len(t, convs, 1)
}

func TestConversationService_DB_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	assert.NotNil(t, svc.DB())
}

func TestConversationService_DB_Nil_Cov18(t *testing.T) {
	var svc *ConversationService
	assert.Nil(t, svc.DB())
}

func TestConversationService_SetSearchIndexer_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	svc.SetSearchIndexer(nil) // should not panic
}

func TestConversationService_SetAppliedSlaService_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	svc.SetAppliedSlaService(nil) // should not panic
}

func TestConversationService_SetTranscriptDeliverer_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	svc.SetTranscriptDeliverer(nil) // should not panic
}

func TestConversationService_GetByAccountAndDisplayIDOrID_Cov18(t *testing.T) {
	svc, _ := setupConvServiceCov18(t)
	conv, err := svc.Create(context.Background(), 1, CreateConversationRequest{
		InboxID:   1,
		ContactID: 1,
	})
	require.NoError(t, err)

	got, err := svc.GetByAccountAndDisplayIDOrID(context.Background(), 1, conv.ID)
	require.NoError(t, err)
	assert.Equal(t, conv.ID, got.ID)
}

// ============================================================
// WidgetService tests — targeting 0% methods
// ============================================================

func setupWidgetServiceCov18(t *testing.T) (*WidgetService, *gorm.DB) {
	t.Helper()
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)

	inboxRepo := repository.NewInboxRepo(db)
	contactRepo := repository.NewContactRepo(db)
	contactInboxRepo := repository.NewContactInboxRepo(db)
	convRepo := repository.NewConversationRepo(db)
	msgRepo := repository.NewMessageRepo(db)

	// Create a web_widget inbox with website_token in channel_config
	inboxSvc := NewInboxService(inboxRepo, nil, nil, nil, nil, nil, nil)
	inbox, err := inboxSvc.Create(context.Background(), 1, CreateInboxRequest{
		Name:        "Widget",
		ChannelType: "web_widget",
		Enabled:     true,
	})
	require.NoError(t, err)
	_ = inbox

	svc := NewWidgetService(inboxRepo, contactRepo, contactInboxRepo, convRepo, msgRepo,
		nil, nil, nil, nil, nil, nil, nil, nil)
	return svc, db
}

func TestWidgetService_SetWorkerPool_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	svc.SetWorkerPool(nil) // should not panic
}

func TestWidgetService_SetTranscriptDeliverer_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	svc.SetTranscriptDeliverer(nil) // should not panic
}

func TestWidgetService_SetDispatcher_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	svc.SetDispatcher(nil) // should not panic
}

func TestWidgetService_Init_NoToken_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	_, err := svc.Init(context.Background(), WidgetInitRequest{})
	require.Error(t, err)
}

func TestWidgetService_Init_InvalidToken_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	_, err := svc.Init(context.Background(), WidgetInitRequest{
		WebsiteToken: "invalid_token",
	})
	require.Error(t, err)
}

func TestWidgetService_Init_ValidToken_Cov18(t *testing.T) {
	svc, db := setupWidgetServiceCov18(t)
	// Find the inbox we created and extract website_token from channel_config
	var inbox model.Inbox
	require.NoError(t, db.First(&inbox).Error)

	config, err := ParseWebWidgetConfig(inbox.ChannelConfig)
	require.NoError(t, err)
	require.NotEmpty(t, config.WebsiteToken)

	resp, err := svc.Init(context.Background(), WidgetInitRequest{
		WebsiteToken: config.WebsiteToken,
	})
	require.NoError(t, err)
	assert.NotEmpty(t, resp.WidgetToken)
	assert.NotZero(t, resp.ContactID)
	assert.Equal(t, inbox.ID, resp.InboxID)
}

func TestWidgetService_Init_WithContactInfo_Cov18(t *testing.T) {
	svc, db := setupWidgetServiceCov18(t)
	var inbox model.Inbox
	require.NoError(t, db.First(&inbox).Error)

	config, err := ParseWebWidgetConfig(inbox.ChannelConfig)
	require.NoError(t, err)

	resp, err := svc.Init(context.Background(), WidgetInitRequest{
		WebsiteToken: config.WebsiteToken,
		ContactName:  "John",
		ContactEmail: "john@example.com",
	})
	require.NoError(t, err)
	assert.Equal(t, "John", resp.Contact.Name)
}

func TestWidgetService_SendMessage_NoToken_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	_, err := svc.SendMessage(context.Background(), WidgetSendMessageRequest{
		Content: "Hello",
	})
	require.Error(t, err)
}

func TestWidgetService_SendMessage_EmptyContent_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	_, err := svc.SendMessage(context.Background(), WidgetSendMessageRequest{
		WidgetToken: "token",
	})
	require.Error(t, err)
}

func TestWidgetService_SendMessage_ContentTooLong_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	longContent := make([]rune, widgetMessageContentLimit+1)
	for i := range longContent {
		longContent[i] = 'x'
	}
	_, err := svc.SendMessage(context.Background(), WidgetSendMessageRequest{
		WidgetToken: "token",
		Content:     string(longContent),
	})
	require.Error(t, err)
	assert.True(t, errors.Is(err, ErrWidgetMessageContentTooLong))
}

func TestWidgetService_SendMessage_InvalidToken_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	_, err := svc.SendMessage(context.Background(), WidgetSendMessageRequest{
		WidgetToken: "invalid",
		Content:     "Hello",
	})
	require.Error(t, err)
}

func TestWidgetService_SendMessage_Valid_Cov18(t *testing.T) {
	svc, db := setupWidgetServiceCov18(t)
	var inbox model.Inbox
	require.NoError(t, db.First(&inbox).Error)

	config, err := ParseWebWidgetConfig(inbox.ChannelConfig)
	require.NoError(t, err)

	resp, err := svc.Init(context.Background(), WidgetInitRequest{
		WebsiteToken: config.WebsiteToken,
	})
	require.NoError(t, err)

	msgResp, err := svc.SendMessage(context.Background(), WidgetSendMessageRequest{
		WidgetToken: resp.WidgetToken,
		Content:     "Hello World",
	})
	require.NoError(t, err)
	assert.NotZero(t, msgResp.ConversationID)
	assert.Equal(t, "Hello World", msgResp.Message.Content)
}

func TestWidgetService_GetConversations_InvalidToken_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	_, err := svc.GetConversations(context.Background(), "invalid")
	require.Error(t, err)
}

func TestWidgetService_GetConversations_Valid_Cov18(t *testing.T) {
	svc, db := setupWidgetServiceCov18(t)
	var inbox model.Inbox
	require.NoError(t, db.First(&inbox).Error)

	config, err := ParseWebWidgetConfig(inbox.ChannelConfig)
	require.NoError(t, err)

	resp, err := svc.Init(context.Background(), WidgetInitRequest{
		WebsiteToken: config.WebsiteToken,
	})
	require.NoError(t, err)

	// Send a message to create a conversation
	_, err = svc.SendMessage(context.Background(), WidgetSendMessageRequest{
		WidgetToken: resp.WidgetToken,
		Content:     "Test",
	})
	require.NoError(t, err)

	convs, err := svc.GetConversations(context.Background(), resp.WidgetToken)
	require.NoError(t, err)
	assert.NotEmpty(t, convs)
}

func TestWidgetService_GetLatestConversation_InvalidToken_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	_, err := svc.GetLatestConversation(context.Background(), "invalid")
	require.Error(t, err)
}

func TestWidgetService_GetLatestConversation_NoConversation_Cov18(t *testing.T) {
	svc, db := setupWidgetServiceCov18(t)
	var inbox model.Inbox
	require.NoError(t, db.First(&inbox).Error)

	config, err := ParseWebWidgetConfig(inbox.ChannelConfig)
	require.NoError(t, err)

	resp, err := svc.Init(context.Background(), WidgetInitRequest{
		WebsiteToken: config.WebsiteToken,
	})
	require.NoError(t, err)

	_, err = svc.GetLatestConversation(context.Background(), resp.WidgetToken)
	require.Error(t, err)
	assert.True(t, errors.Is(err, ErrWidgetConversationNotFound))
}

func TestWidgetService_GetLatestConversation_Valid_Cov18(t *testing.T) {
	svc, db := setupWidgetServiceCov18(t)
	var inbox model.Inbox
	require.NoError(t, db.First(&inbox).Error)

	config, err := ParseWebWidgetConfig(inbox.ChannelConfig)
	require.NoError(t, err)

	resp, err := svc.Init(context.Background(), WidgetInitRequest{
		WebsiteToken: config.WebsiteToken,
	})
	require.NoError(t, err)

	_, err = svc.SendMessage(context.Background(), WidgetSendMessageRequest{
		WidgetToken: resp.WidgetToken,
		Content:     "Test",
	})
	require.NoError(t, err)

	conv, err := svc.GetLatestConversation(context.Background(), resp.WidgetToken)
	require.NoError(t, err)
	assert.NotZero(t, conv.ID)
}

func TestWidgetService_GetConversation_InvalidToken_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	_, err := svc.GetConversation(context.Background(), "invalid", 1)
	require.Error(t, err)
}

func TestWidgetService_GetInboxMembers_NoMembers_Cov18(t *testing.T) {
	svc, db := setupWidgetServiceCov18(t)
	var inbox model.Inbox
	require.NoError(t, db.First(&inbox).Error)

	config, err := ParseWebWidgetConfig(inbox.ChannelConfig)
	require.NoError(t, err)

	members, err := svc.GetInboxMembersByWebsiteToken(context.Background(), config.WebsiteToken)
	require.NoError(t, err)
	assert.Empty(t, members)
}

func TestWidgetService_GetCampaigns_NoCampaigns_Cov18(t *testing.T) {
	svc, db := setupWidgetServiceCov18(t)
	var inbox model.Inbox
	require.NoError(t, db.First(&inbox).Error)

	config, err := ParseWebWidgetConfig(inbox.ChannelConfig)
	require.NoError(t, err)

	campaigns, err := svc.GetCampaignsByWebsiteToken(context.Background(), config.WebsiteToken)
	require.NoError(t, err)
	assert.Empty(t, campaigns)
}

func TestWidgetService_TrackEvent_NoToken_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	err := svc.TrackEvent(context.Background(), "", "token", "event", nil)
	require.Error(t, err)
}

func TestWidgetService_TrackEvent_NoName_Cov18(t *testing.T) {
	svc, db := setupWidgetServiceCov18(t)
	var inbox model.Inbox
	require.NoError(t, db.First(&inbox).Error)

	config, err := ParseWebWidgetConfig(inbox.ChannelConfig)
	require.NoError(t, err)

	err = svc.TrackEvent(context.Background(), config.WebsiteToken, "token", "", nil)
	require.Error(t, err)
}

func TestWidgetService_AddLabel_EmptyLabel_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	err := svc.AddLabelToLatestConversation(context.Background(), "token", "")
	require.NoError(t, err) // empty label → no-op
}

func TestWidgetService_RemoveLabel_EmptyLabel_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	err := svc.RemoveLabelFromLatestConversation(context.Background(), "token", "")
	require.NoError(t, err) // empty label → no-op
}

func TestWidgetService_PublicGetInbox_InvalidIdentifier_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	_, _, err := svc.PublicGetInbox(context.Background(), "nonexistent")
	require.Error(t, err)
}

func TestWidgetService_PublicCreateContact_InvalidIdentifier_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	_, err := svc.PublicCreateContact(context.Background(), "nonexistent", PublicContactRequest{})
	require.Error(t, err)
}

func TestWidgetService_PublicGetContact_InvalidIdentifier_Cov18(t *testing.T) {
	svc, _ := setupWidgetServiceCov18(t)
	_, err := svc.PublicGetContact(context.Background(), "nonexistent", "source")
	require.Error(t, err)
}

// ============================================================
// ContactService tests — targeting 0% methods
// ============================================================

func setupContactServiceCov18(t *testing.T) (*ContactService, *gorm.DB) {
	t.Helper()
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	repo := repository.NewContactRepo(db)
	contactInboxRepo := repository.NewContactInboxRepo(db)
	noteRepo := repository.NewNoteRepo(db)
	contactInboxSvc := NewContactInboxService(contactInboxRepo)
	svc := NewContactService(repo, contactInboxSvc, noteRepo)
	return svc, db
}

func TestContactService_Create_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	contact, err := svc.Create(context.Background(), 1, CreateContactRequest{
		Name:  "John Doe",
		Email: "john@example.com",
	})
	require.NoError(t, err)
	assert.NotZero(t, contact.ID)
	assert.Equal(t, "John Doe", contact.Name)
}

func TestContactService_Create_WithInbox_Cov18(t *testing.T) {
	svc, db := setupContactServiceCov18(t)
	require.NoError(t, db.Create(&model.Inbox{AccountID: 1, Name: "Inbox", ChannelType: "web_widget", Enabled: true}).Error)
	inboxID := uint(1)
	contact, err := svc.Create(context.Background(), 1, CreateContactRequest{
		Name:    "John",
		Email:   "john@test.com",
		InboxID: &inboxID,
	})
	require.NoError(t, err)
	assert.NotZero(t, contact.ID)
}

func TestContactService_Create_ValidationError_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	_, err := svc.Create(context.Background(), 1, CreateContactRequest{
		Name: "", // required
	})
	require.Error(t, err)
}

func TestContactService_GetByID_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	contact, err := svc.Create(context.Background(), 1, CreateContactRequest{
		Name: "John",
	})
	require.NoError(t, err)

	got, err := svc.GetByID(context.Background(), contact.ID)
	require.NoError(t, err)
	assert.Equal(t, contact.ID, got.ID)
}

func TestContactService_GetByID_NotFound_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	_, err := svc.GetByID(context.Background(), 99999)
	require.Error(t, err)
}

func TestContactService_GetByAccountAndID_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	contact, err := svc.Create(context.Background(), 1, CreateContactRequest{
		Name: "John",
	})
	require.NoError(t, err)

	got, err := svc.GetByAccountAndID(context.Background(), 1, contact.ID)
	require.NoError(t, err)
	assert.Equal(t, contact.ID, got.ID)
}

func TestContactService_GetByAccountAndID_NotFound_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	_, err := svc.GetByAccountAndID(context.Background(), 1, 99999)
	require.Error(t, err)
}

func TestContactService_ListByAccount_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	_, err := svc.Create(context.Background(), 1, CreateContactRequest{Name: "C1", Email: "c1@test.com"})
	require.NoError(t, err)
	_, err = svc.Create(context.Background(), 1, CreateContactRequest{Name: "C2", Email: "c2@test.com"})
	require.NoError(t, err)

	contacts, total, err := svc.ListByAccount(context.Background(), 1, 0, 10, "")
	require.NoError(t, err)
	assert.Equal(t, int64(2), total)
	assert.Len(t, contacts, 2)
}

func TestContactService_Update_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	contact, err := svc.Create(context.Background(), 1, CreateContactRequest{
		Name: "Original",
	})
	require.NoError(t, err)

	updated, err := svc.Update(context.Background(), 1, contact.ID, UpdateContactRequest{
		Name:  "Updated",
		Email: "updated@example.com",
	})
	require.NoError(t, err)
	assert.Equal(t, "Updated", updated.Name)
	assert.Equal(t, "updated@example.com", updated.Email)
}

func TestContactService_Update_NotFound_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	_, err := svc.Update(context.Background(), 1, 99999, UpdateContactRequest{
		Name: "X",
	})
	require.Error(t, err)
}

func TestContactService_Delete_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	contact, err := svc.Create(context.Background(), 1, CreateContactRequest{
		Name: "Delete Me",
	})
	require.NoError(t, err)

	err = svc.Delete(context.Background(), 1, contact.ID)
	require.NoError(t, err)
}

func TestContactService_Delete_NotFound_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	err := svc.Delete(context.Background(), 1, 99999)
	require.Error(t, err)
}

func TestContactService_Ready_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	assert.True(t, svc.Ready())
}

func TestContactService_Ready_Nil_Cov18(t *testing.T) {
	var svc *ContactService
	assert.False(t, svc.Ready())
}

func TestContactService_DB_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	assert.NotNil(t, svc.DB())
}

func TestContactService_DB_Nil_Cov18(t *testing.T) {
	var svc *ContactService
	assert.Nil(t, svc.DB())
}

func TestContactService_Search_EmptyQuery_Cov18(t *testing.T) {
	t.Skip("SQLite search issue")
	svc, _ := setupContactServiceCov18(t)
	_, err := svc.Create(context.Background(), 1, CreateContactRequest{Name: "C1"})
	require.NoError(t, err)

	contacts, total, err := svc.Search(context.Background(), 1, "", 0, 10, "", search.SearchModeILike)
	require.NoError(t, err)
	assert.Equal(t, int64(1), total)
	assert.Len(t, contacts, 1)
}

func TestContactService_CreateNote_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	contact, err := svc.Create(context.Background(), 1, CreateContactRequest{Name: "C1"})
	require.NoError(t, err)

	note, err := svc.CreateNote(context.Background(), 1, contact.ID, 1, CreateNoteRequest{
		Content: "Test note",
	})
	require.NoError(t, err)
	assert.NotZero(t, note.ID)
	assert.Equal(t, "Test note", note.Content)
}

func TestContactService_CreateNote_ContactNotFound_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	_, err := svc.CreateNote(context.Background(), 1, 99999, 1, CreateNoteRequest{
		Content: "Test",
	})
	require.Error(t, err)
}

func TestContactService_ListNotes_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	contact, err := svc.Create(context.Background(), 1, CreateContactRequest{Name: "C1"})
	require.NoError(t, err)

	_, err = svc.CreateNote(context.Background(), 1, contact.ID, 1, CreateNoteRequest{
		Content: "Note 1",
	})
	require.NoError(t, err)

	notes, err := svc.ListNotes(context.Background(), 1, contact.ID)
	require.NoError(t, err)
	assert.Len(t, notes, 1)
}

func TestContactService_ListNotes_ContactNotFound_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	_, err := svc.ListNotes(context.Background(), 1, 99999)
	require.Error(t, err)
}

func TestContactService_UpdateNote_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	contact, err := svc.Create(context.Background(), 1, CreateContactRequest{Name: "C1"})
	require.NoError(t, err)

	note, err := svc.CreateNote(context.Background(), 1, contact.ID, 1, CreateNoteRequest{
		Content: "Original",
	})
	require.NoError(t, err)

	updated, err := svc.UpdateNote(context.Background(), 1, contact.ID, note.ID, CreateNoteRequest{
		Content: "Updated",
	})
	require.NoError(t, err)
	assert.Equal(t, "Updated", updated.Content)
}

func TestContactService_DeleteNote_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	contact, err := svc.Create(context.Background(), 1, CreateContactRequest{Name: "C1"})
	require.NoError(t, err)

	note, err := svc.CreateNote(context.Background(), 1, contact.ID, 1, CreateNoteRequest{
		Content: "Delete me",
	})
	require.NoError(t, err)

	err = svc.DeleteNote(context.Background(), 1, contact.ID, note.ID)
	require.NoError(t, err)
}

func TestContactService_ExportCSV_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	_, err := svc.Create(context.Background(), 1, CreateContactRequest{
		Name:  "Export",
		Email: "export@test.com",
	})
	require.NoError(t, err)

	var buf bytes.Buffer
	err = svc.ExportCSV(context.Background(), 1, &buf)
	require.NoError(t, err)
	assert.NotEmpty(t, buf.Bytes())
}

func TestContactService_SetSearchIndexer_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	svc.SetSearchIndexer(nil) // should not panic
}

func TestContactService_SetSearchReader_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	svc.SetSearchReader(nil) // should not panic
}

func TestContactService_SetContactExportMailer_Cov18(t *testing.T) {
	svc, _ := setupContactServiceCov18(t)
	svc.SetContactExportMailer(nil) // should not panic
}

// ============================================================
// AccountService tests — targeting 0% methods
// ============================================================

func TestAccountService_GetByID_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	svc := NewAccountService(repository.NewAccountRepo(db))

	account, err := svc.GetByID(context.Background(), 1)
	require.NoError(t, err)
	assert.Equal(t, "Test", account.Name)
}

func TestAccountService_GetByID_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	svc := NewAccountService(repository.NewAccountRepo(db))

	_, err := svc.GetByID(context.Background(), 99999)
	require.Error(t, err)
}

func TestAccountService_DB_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	svc := NewAccountService(repository.NewAccountRepo(db))
	assert.NotNil(t, svc.DB())
}

func TestAccountService_DB_Nil_Cov18(t *testing.T) {
	var svc *AccountService
	assert.Nil(t, svc.DB())
}

func TestAccountService_Create_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.User{Name: "User"}).Error)
	svc := NewAccountService(repository.NewAccountRepo(db))

	account, err := svc.Create(context.Background(), 1, CreateAccountRequest{
		Name: "New Account",
	})
	require.NoError(t, err)
	assert.NotZero(t, account.ID)
	assert.Equal(t, "New Account", account.Name)
}

func TestAccountService_Create_NoName_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	svc := NewAccountService(repository.NewAccountRepo(db))

	_, err := svc.Create(context.Background(), 1, CreateAccountRequest{})
	require.Error(t, err)
}

func TestAccountService_Update_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	svc := NewAccountService(repository.NewAccountRepo(db))

	updated, err := svc.Update(context.Background(), 1, UpdateAccountRequest{
		Name: "Updated Account",
	})
	require.NoError(t, err)
	assert.Equal(t, "Updated Account", updated.Name)
}

func TestAccountService_Update_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	svc := NewAccountService(repository.NewAccountRepo(db))

	_, err := svc.Update(context.Background(), 99999, UpdateAccountRequest{
		Name: "X",
	})
	require.Error(t, err)
}

func TestAccountService_Delete_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	svc := NewAccountService(repository.NewAccountRepo(db))

	err := svc.Delete(context.Background(), 1)
	require.NoError(t, err)
}

func TestAccountService_ListByUser_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.User{Name: "User"}).Error)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	require.NoError(t, db.Create(&model.AccountUser{AccountID: 1, UserID: 1, Role: "administrator"}).Error)
	svc := NewAccountService(repository.NewAccountRepo(db))

	accounts, total, err := svc.ListByUser(context.Background(), 1, 0, 10)
	require.NoError(t, err)
	assert.Equal(t, int64(1), total)
	assert.Len(t, accounts, 1)
}

func TestAccountService_HelpCenterGenerationStatus_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	require.NoError(t, db.Create(&model.Account{Name: "Test", Status: "active"}).Error)
	svc := NewAccountService(repository.NewAccountRepo(db))

	status, err := svc.HelpCenterGenerationStatus(context.Background(), 1)
	require.NoError(t, err)
	assert.NotNil(t, status)
}

func TestAccountService_SetWorkerPool_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	svc := NewAccountService(repository.NewAccountRepo(db))
	svc.SetWorkerPool(nil) // should not panic
}

// ============================================================
// WhatsAppCallService tests — targeting 0% methods
// ============================================================

func TestWhatsAppCallService_CreateFromRequest_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &model.WhatsAppCall{})
	repo := repository.NewWhatsAppCallRepo(db)
	svc := NewWhatsAppCallService(repo)

	call, err := svc.CreateFromRequest(context.Background(), &WhatsAppCallCreateRequest{
		CallID:         "call_123",
		InboxID:        1,
		ConversationID: 1,
		CallStatus:     "ringing",
	})
	require.NoError(t, err)
	assert.NotZero(t, call.ID)
	assert.Equal(t, "call_123", call.CallID)
}

func TestWhatsAppCallService_CreateFromRequest_InvalidStatus_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &model.WhatsAppCall{})
	repo := repository.NewWhatsAppCallRepo(db)
	svc := NewWhatsAppCallService(repo)

	_, err := svc.CreateFromRequest(context.Background(), &WhatsAppCallCreateRequest{
		CallID:     "call_123",
		CallStatus: "invalid",
	})
	require.Error(t, err)
}

func TestWhatsAppCallService_GetByCallID_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &model.WhatsAppCall{})
	repo := repository.NewWhatsAppCallRepo(db)
	svc := NewWhatsAppCallService(repo)

	_, err := svc.CreateFromRequest(context.Background(), &WhatsAppCallCreateRequest{
		CallID:         "call_123",
		InboxID:        1,
		ConversationID: 1,
		CallStatus:     "ringing",
	})
	require.NoError(t, err)

	call, err := svc.GetByCallID(context.Background(), "call_123")
	require.NoError(t, err)
	assert.Equal(t, "call_123", call.CallID)
}

func TestWhatsAppCallService_GetByCallID_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &model.WhatsAppCall{})
	repo := repository.NewWhatsAppCallRepo(db)
	svc := NewWhatsAppCallService(repo)

	_, err := svc.GetByCallID(context.Background(), "nonexistent")
	require.Error(t, err)
}

func TestWhatsAppCallService_ListByConversation_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &model.WhatsAppCall{})
	repo := repository.NewWhatsAppCallRepo(db)
	svc := NewWhatsAppCallService(repo)

	_, err := svc.CreateFromRequest(context.Background(), &WhatsAppCallCreateRequest{
		CallID:         "call_123",
		InboxID:        1,
		ConversationID: 1,
		CallStatus:     "ringing",
	})
	require.NoError(t, err)

	calls, err := svc.ListByConversation(context.Background(), 1)
	require.NoError(t, err)
	assert.Len(t, calls, 1)
}

func TestWhatsAppCallService_UpdateByCallID_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &model.WhatsAppCall{})
	repo := repository.NewWhatsAppCallRepo(db)
	svc := NewWhatsAppCallService(repo)

	_, err := svc.CreateFromRequest(context.Background(), &WhatsAppCallCreateRequest{
		CallID:         "call_123",
		InboxID:        1,
		ConversationID: 1,
		CallStatus:     "ringing",
	})
	require.NoError(t, err)

	call, err := svc.UpdateByCallID(context.Background(), "call_123", "active", 30)
	require.NoError(t, err)
	assert.Equal(t, "active", call.CallStatus)
	assert.Equal(t, 30, call.Duration)
}

func TestWhatsAppCallService_UpdateByCallID_InvalidStatus_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &model.WhatsAppCall{})
	repo := repository.NewWhatsAppCallRepo(db)
	svc := NewWhatsAppCallService(repo)

	_, err := svc.CreateFromRequest(context.Background(), &WhatsAppCallCreateRequest{
		CallID:         "call_123",
		InboxID:        1,
		ConversationID: 1,
		CallStatus:     "ringing",
	})
	require.NoError(t, err)

	_, err = svc.UpdateByCallID(context.Background(), "call_123", "invalid", 0)
	require.Error(t, err)
}

func TestWhatsAppCallService_DeleteByCallID_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &model.WhatsAppCall{})
	repo := repository.NewWhatsAppCallRepo(db)
	svc := NewWhatsAppCallService(repo)

	_, err := svc.CreateFromRequest(context.Background(), &WhatsAppCallCreateRequest{
		CallID:         "call_123",
		InboxID:        1,
		ConversationID: 1,
		CallStatus:     "ringing",
	})
	require.NoError(t, err)

	err = svc.DeleteByCallID(context.Background(), "call_123")
	require.NoError(t, err)
}

func TestWhatsAppCallService_DeleteByCallID_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &model.WhatsAppCall{})
	repo := repository.NewWhatsAppCallRepo(db)
	svc := NewWhatsAppCallService(repo)

	err := svc.DeleteByCallID(context.Background(), "nonexistent")
	require.Error(t, err)
}

func TestWhatsAppCallService_Initiate_NoSDP_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &model.WhatsAppCall{})
	repo := repository.NewWhatsAppCallRepo(db)
	svc := NewWhatsAppCallService(repo)

	_, err := svc.Initiate(context.Background(), 1, WhatsAppCallInitiateRequest{
		ConversationID: 1,
		SDPOffer:       "",
	})
	require.Error(t, err)
}

func TestWhatsAppCallService_Accept_NoSDP_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &model.WhatsAppCall{})
	repo := repository.NewWhatsAppCallRepo(db)
	svc := NewWhatsAppCallService(repo)

	_, err := svc.Accept(context.Background(), 1, 1, 1, "")
	require.Error(t, err)
}

// ============================================================
// ArticleService tests — targeting 0% methods
// ============================================================

func TestArticleService_Create_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewArticleRepo(db)
	svc := NewArticleService(repo)

	article, err := svc.Create(context.Background(), 1, 1, &CreateArticleRequest{
		Title:   "Test Article",
		Content: "Content here",
	})
	require.NoError(t, err)
	assert.NotZero(t, article.ID)
	assert.Equal(t, "Test Article", article.Title)
}

func TestArticleService_GetByID_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewArticleRepo(db)
	svc := NewArticleService(repo)

	article, err := svc.Create(context.Background(), 1, 1, &CreateArticleRequest{
		Title: "Test",
	})
	require.NoError(t, err)

	got, err := svc.GetByID(context.Background(), article.ID)
	require.NoError(t, err)
	assert.Equal(t, article.ID, got.ID)
}

func TestArticleService_GetByID_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewArticleRepo(db)
	svc := NewArticleService(repo)

	_, err := svc.GetByID(context.Background(), 99999)
	require.Error(t, err)
}

func TestArticleService_Update_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewArticleRepo(db)
	svc := NewArticleService(repo)

	article, err := svc.Create(context.Background(), 1, 1, &CreateArticleRequest{
		Title: "Original",
	})
	require.NoError(t, err)

	newTitle := "Updated"
	updated, err := svc.Update(context.Background(), article.ID, &UpdateArticleRequest{
		Title: &newTitle,
	})
	require.NoError(t, err)
	assert.Equal(t, "Updated", updated.Title)
}

func TestArticleService_Update_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewArticleRepo(db)
	svc := NewArticleService(repo)

	_, err := svc.Update(context.Background(), 99999, &UpdateArticleRequest{})
	require.Error(t, err)
}

func TestArticleService_Delete_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewArticleRepo(db)
	svc := NewArticleService(repo)

	article, err := svc.Create(context.Background(), 1, 1, &CreateArticleRequest{
		Title: "Delete Me",
	})
	require.NoError(t, err)

	err = svc.Delete(context.Background(), article.ID)
	require.NoError(t, err)
}

func TestArticleService_SetSearchIndexer_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewArticleRepo(db)
	svc := NewArticleService(repo)
	svc.SetSearchIndexer(nil) // should not panic
}

func TestArticleService_SetWorkerPool_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewArticleRepo(db)
	svc := NewArticleService(repo)
	svc.SetWorkerPool(nil) // should not panic
}

func TestArticleService_SetArticleTranslationBackend_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewArticleRepo(db)
	svc := NewArticleService(repo)
	svc.SetArticleTranslationBackend(nil) // should not panic
}

func TestArticleService_EmbeddingReindexStatus_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewArticleRepo(db)
	svc := NewArticleService(repo)

	status := svc.EmbeddingReindexStatus()
	assert.False(t, status.Running)
}

func TestArticleService_StartEmbeddingReindex_NotConfigured_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewArticleRepo(db)
	svc := NewArticleService(repo)

	_, err := svc.StartEmbeddingReindex()
	require.Error(t, err)
}

// ============================================================
// ChannelInstagramService tests — targeting 0% methods
// ============================================================

func TestChannelInstagramService_GetByID_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelInstagram{})
	repo := repository.NewChannelInstagramRepo(db)
	svc := NewChannelInstagramService(repo, nil)

	_, err := svc.GetByID(context.Background(), 99999)
	require.Error(t, err)
}

func TestChannelInstagramService_GetByInboxID_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelInstagram{})
	repo := repository.NewChannelInstagramRepo(db)
	svc := NewChannelInstagramService(repo, nil)

	_, err := svc.GetByInboxID(context.Background(), 99999)
	require.Error(t, err)
}

func TestChannelInstagramService_GetByAccountAndInboxID_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelInstagram{})
	repo := repository.NewChannelInstagramRepo(db)
	svc := NewChannelInstagramService(repo, nil)

	_, err := svc.GetByAccountAndInboxID(context.Background(), 1, 99999)
	require.Error(t, err)
}

func TestChannelInstagramService_FindByInstagramAccountID_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelInstagram{})
	repo := repository.NewChannelInstagramRepo(db)
	svc := NewChannelInstagramService(repo, nil)

	_, err := svc.FindByInstagramAccountID(context.Background(), "nonexistent")
	require.Error(t, err)
}

func TestChannelInstagramService_FindByConnectedFBPageID_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelInstagram{})
	repo := repository.NewChannelInstagramRepo(db)
	svc := NewChannelInstagramService(repo, nil)

	_, err := svc.FindByConnectedFBPageID(context.Background(), "nonexistent")
	require.Error(t, err)
}

func TestChannelInstagramService_Update_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelInstagram{})
	repo := repository.NewChannelInstagramRepo(db)
	svc := NewChannelInstagramService(repo, nil)

	_, err := svc.Update(context.Background(), 1, 99999, UpdateInstagramChannelRequest{})
	require.Error(t, err)
}

func TestChannelInstagramService_ListByAccount_Empty_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelInstagram{})
	repo := repository.NewChannelInstagramRepo(db)
	svc := NewChannelInstagramService(repo, nil)

	channels, err := svc.ListByAccount(context.Background(), 1)
	require.NoError(t, err)
	assert.Empty(t, channels)
}

func TestChannelInstagramService_MarkReauthorization_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t, &channelmodel.ChannelInstagram{})
	repo := repository.NewChannelInstagramRepo(db)
	svc := NewChannelInstagramService(repo, nil)

	err := svc.MarkReauthorizationRequired(context.Background(), 99999)
	require.Error(t, err)
}

// ============================================================
// AppliedSlaService tests — targeting 0% methods
// ============================================================

func TestAppliedSlaService_ValidateSlaPolicy_NotFound_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	repo := repository.NewAppliedSlaRepo(db)
	slaEventRepo := repository.NewSlaEventRepo(db)
	slaPolicyRepo := repository.NewSlaPolicyRepo(db)
	convRepo := repository.NewConversationRepo(db)
	svc := NewAppliedSlaService(repo, slaEventRepo, slaPolicyRepo, convRepo)

	err := svc.ValidateSlaPolicy(context.Background(), 1, 99999)
	require.Error(t, err)
}

// ============================================================
// RBACService tests
// ============================================================

func TestRBACService_New_Cov18(t *testing.T) {
	db := newSimpleServiceTestDB(t)
	svc := NewRBACService(db)
	assert.NotNil(t, svc)
}