package svc

import (
	"context"
	"fmt"
	"strings"

	"os"
	"path/filepath"

	"apps/backend/internal/config"
	"apps/backend/internal/middleware"
	"apps/backend/internal/module/ai"
	appnotifRepo "apps/backend/internal/module/appnotif/repository"
	appnotifUC "apps/backend/internal/module/appnotif/usecase"
	fsDomain "apps/backend/internal/module/filestorage/domain"
	"apps/backend/internal/module/filestorage/noop"
	"apps/backend/internal/module/filestorage/s3store"
	jobRepo "apps/backend/internal/module/job/repository"
	jobUC "apps/backend/internal/module/job/usecase"
	memberDomain "apps/backend/internal/module/member/domain"
	memberRepo "apps/backend/internal/module/member/repository"
	memberUC "apps/backend/internal/module/member/usecase"
	notifDomain "apps/backend/internal/module/notification/domain"
	notifUC "apps/backend/internal/module/notification/usecase"
	"apps/backend/internal/module/search"
	inspireRepo "apps/backend/internal/module/inspire/repository"
	inspireUC "apps/backend/internal/module/inspire/usecase"
	scoutRepo "apps/backend/internal/module/scout/repository"
	scoutUC "apps/backend/internal/module/scout/usecase"
	studioDomain "apps/backend/internal/module/studio/domain"
	studioPublish "apps/backend/internal/module/studio/publish"
	studioRepo "apps/backend/internal/module/studio/repository"
	studioUC "apps/backend/internal/module/studio/usecase"
	threadsDomain "apps/backend/internal/module/threads/domain"
	threadsProv "apps/backend/internal/module/threads/provider"
	threadsRepo "apps/backend/internal/module/threads/repository"
	threadsUC "apps/backend/internal/module/threads/usecase"
	tokenUC "apps/backend/internal/module/token/usecase"
	usageDomain "apps/backend/internal/module/usage/domain"
	usageRepo "apps/backend/internal/module/usage/repository"
	usageUC "apps/backend/internal/module/usage/usecase"

	"github.com/zeromicro/go-zero/core/logx"
	"github.com/zeromicro/go-zero/rest"
)

// ServiceContext wires goctl middleware + modules.
type ServiceContext struct {
	Config           config.Config
	AuthJWT          rest.Middleware
	AdminAuth        rest.Middleware
	Members          memberDomain.Repository
	Auth             *memberUC.AuthService
	Token            *tokenUC.JWTIssuer
	Notification     notifDomain.UseCase // email
	Storage          fsDomain.Storage
	Threads          *threadsUC.Service
	Jobs             *jobUC.Service
	AppNotif         *appnotifUC.Service
	Usage            *usageUC.Service
	KeyResolver      *usageUC.SettingsResolver
	AI               ai.Client
	AIRegistry       *ai.Registry
	Search           search.Client
	Studio           *studioUC.Service
	PublishTransport studioPublish.Transport
	Inspire          *inspireUC.Service
	Scout            *scoutUC.Service
	ExtensionZipPath string
}

func NewServiceContext(c config.Config) *ServiceContext {
	if len(c.CacheRedis) == 0 {
		logx.Must(errString("CacheRedis is required for monc entity cache"))
	}

	repo := memberRepo.NewMoncStore(c.Mongo.URI, c.Mongo.Database, c.CacheRedis)
	logx.Infof("mongo monc ready db=%s redis_cache=%s", c.Mongo.Database, c.CacheRedis[0].Host)

	issuer := tokenUC.NewJWTIssuer(
		c.Auth.AccessSecret,
		c.Auth.RefreshSecret,
		c.Auth.AccessExpire,
		c.Auth.RefreshExpire,
	)
	cost := c.Bcrypt.Cost
	if cost <= 0 {
		cost = 10
	}
	auth := memberUC.NewAccountService(repo, issuer, cost)
	auth.GoogleClientID = c.OAuth.GoogleClientID
	auth.LineClientID = c.OAuth.LineClientID
	auth.LineClientSecret = c.OAuth.LineClientSecret
	auth.LineRedirectURI = c.OAuth.LineRedirectURI

	notify := newNotification(c)
	store := newStorage(c)

	appN := appnotifUC.New(appnotifRepo.NewMonStore(c.Mongo.URI, c.Mongo.Database))
	jobs := jobUC.New(jobRepo.NewMonStore(c.Mongo.URI, c.Mongo.Database))
	jobs.Notifier = appN
	threadsSvc := newThreads(c)
	// 連帳成功 → 排程 ~30 天後 token renew job
	threadsSvc.Renew = jobs

	keyRes := &usageUC.SettingsResolver{
		Members:          repo,
		PlatformAI:       c.Platform.AIKey,
		PlatformXAI:      c.Platform.XAIKey,
		PlatformOpenCode: c.Platform.OpenCodeKey,
		PlatformExa:      c.Platform.ExaKey,
	}
	// Dev: empty platform keys still allow PrepareCall for quota path; real LLM needs real key
	if keyRes.PlatformAI == "" && keyRes.PlatformXAI == "" && keyRes.PlatformOpenCode == "" {
		keyRes.PlatformAI = "fake-platform-ai"
		logx.Info("usage: no platform AI keys — using fake-platform-ai for quota only (persona LLM needs real key)")
	}
	if keyRes.PlatformExa == "" {
		keyRes.PlatformExa = "fake-platform-exa"
		logx.Info("usage: Platform.ExaKey empty — using fake-platform-exa for demo/proxy")
	}
	usageSvc := usageUC.New(usageRepo.NewMonStore(c.Mongo.URI, c.Mongo.Database), keyRes)

	// M4 studio: mon store + publish transport（有 Meta 憑證則真發文／同步）
	var pub studioPublish.Transport
	var mediaSource studioUC.ThreadsMediaSource
	if strings.TrimSpace(c.Platform.ThreadsAppId) != "" && strings.TrimSpace(c.Platform.ThreadsAppSecret) != "" {
		pub = studioPublish.NewMeta("https://graph.threads.net")
		mediaSource = &metaMediaBridge{Meta: threadsProv.NewMeta(c.Platform.ThreadsAppId, c.Platform.ThreadsAppSecret)}
		logx.Info("studio: meta publish + own-posts sync enabled")
	} else {
		pub = studioPublish.NewFake()
		logx.Info("studio: fake publish transport (no Threads app credentials)")
	}
	aiRegistry := ai.NewRegistry()
	aiClient := &ai.FakeClient{} // tests / synthetic keys only
	var searchClient search.Client
	if strings.TrimSpace(c.Platform.ExaKey) != "" {
		searchClient = search.NewExa()
		logx.Info("search: real Exa client")
	} else {
		searchClient = &search.FakeClient{}
		logx.Info("search: FakeClient (no Platform.ExaKey)")
	}
	studioSvc := studioUC.New(studioRepo.NewMonStore(c.Mongo.URI, c.Mongo.Database), pub)
	studioSvc.Accounts = threadsSvc // *threadsUC.Service implements AccountLookup
	studioSvc.Usage = usageSvc
	studioSvc.AI = aiClient
	studioSvc.AIRegistry = aiRegistry
	studioSvc.Keys = &studioAIKeys{Members: repo, Resolver: keyRes}
	studioSvc.Media = mediaSource
	studioSvc.Storage = store
	studioSvc.StoragePublicBase = strings.TrimSpace(c.ObjectStorage.PublicBaseURL)
	// 人設分析：API 只入列 job，worker 爬取／LLM 後存檔（離開頁面不中斷）
	studioSvc.Jobs = &personaJobBridge{Jobs: jobs}

	// M5 inspire + scout（真 AI + stream）
	inspireSvc := inspireUC.New(inspireRepo.NewMonStore(c.Mongo.URI, c.Mongo.Database))
	inspireSvc.Usage = usageSvc
	inspireSvc.AI = aiClient
	inspireSvc.AIRegistry = aiRegistry
	inspireSvc.ResolveAI = func(ctx context.Context, uid int64) (provider, model, apiKey string, err error) {
		return (&studioAIKeys{Members: repo, Resolver: keyRes}).ResolveAI(ctx, uid)
	}
	inspireSvc.Search = searchClient
	inspireSvc.ResolveKey = func(ctx context.Context, uid int64, meter string) (string, string, error) {
		return keyRes.ResolveKey(ctx, uid, meter)
	}
	scoutSvc := scoutUC.New(scoutRepo.NewMonStore(c.Mongo.URI, c.Mongo.Database))
	scoutSvc.Settings = &devModeFromMembers{Members: repo}
	scoutSvc.Transport = pub
	scoutSvc.Accounts = threadsSvc
	scoutSvc.AI = aiClient
	// 人設對標帳號分析：可用 Chrome 同步的 crawler session 讀公開頁
	studioSvc.Crawler = scoutSvc
	// 靈感 chat 注入真人人設 + 品牌產品目錄
	inspireSvc.Personas = &inspirePersonaBridge{Studio: studioSvc}
	inspireSvc.Brands = &inspireBrandBridge{Scout: scoutSvc}

	zipPath := findExtensionZip()

	return &ServiceContext{
		Config:           c,
		Members:          repo,
		Auth:             auth,
		Token:            issuer,
		Notification:     notify,
		Storage:          store,
		Threads:          threadsSvc,
		Jobs:             jobs,
		AppNotif:         appN,
		Usage:            usageSvc,
		KeyResolver:      keyRes,
		AI:               aiClient,
		AIRegistry:       aiRegistry,
		Search:           searchClient,
		Studio:           studioSvc,
		PublishTransport: pub,
		Inspire:          inspireSvc,
		Scout:            scoutSvc,
		ExtensionZipPath: zipPath,
		AuthJWT:          middleware.NewAuthJWTMiddleware(issuer, repo).Handle,
		AdminAuth:        middleware.NewAdminAuthMiddleware().Handle,
	}
}

// devModeFromMembers adapts member settings for scout path selection.
type devModeFromMembers struct {
	Members memberDomain.Repository
}

func (d *devModeFromMembers) DevModeEnabled(ctx context.Context, uid int64) (bool, error) {
	if d == nil || d.Members == nil {
		return false, nil
	}
	st, err := d.Members.GetSettings(ctx, uid)
	if err != nil || st == nil {
		return false, nil
	}
	return st.DevModeEnabled, nil
}

func findExtensionZip() string {
	cands := []string{
		"../web/public/downloads/haixun-threads-sync.zip",
		"../../apps/web/public/downloads/haixun-threads-sync.zip",
		"apps/web/public/downloads/haixun-threads-sync.zip",
		"/home/daniel/thread-master/apps/web/public/downloads/haixun-threads-sync.zip",
	}
	for _, c := range cands {
		if st, err := os.Stat(c); err == nil && st.Size() > 0 {
			abs, _ := filepath.Abs(c)
			logx.Infof("extension zip: %s (%d bytes)", abs, st.Size())
			return abs
		}
	}
	logx.Error("extension zip not found — ST-16 download will 404")
	return ""
}

func newThreads(c config.Config) *threadsUC.Service {
	repo := threadsRepo.NewMonStore(c.Mongo.URI, c.Mongo.Database)
	secret := c.Auth.AccessSecret
	if secret == "" {
		secret = "dev-token-secret"
	}
	web := strings.TrimRight(c.PublicWebBase, "/")
	if web == "" {
		web = "http://127.0.0.1:5173"
	}
	port := c.Port
	if port == 0 {
		port = 8888
	}
	// Meta 拒絕 http://127.0.0.1 redirect_uri（error 1349187）。
	// 優先 PublicAPIBase → 與 PublicWebBase 同 host（nginx 反代 /api）→ 本機 loopback。
	apiBase := strings.TrimRight(c.PublicAPIBase, "/")
	if apiBase == "" && strings.HasPrefix(web, "https://") {
		apiBase = web
	}
	if apiBase == "" {
		apiBase = fmt.Sprintf("http://127.0.0.1:%d", port)
	}

	var provider threadsDomain.Provider
	if strings.TrimSpace(c.Platform.ThreadsAppId) != "" && strings.TrimSpace(c.Platform.ThreadsAppSecret) != "" {
		provider = threadsProv.NewMeta(c.Platform.ThreadsAppId, c.Platform.ThreadsAppSecret)
		logx.Infof("threads oauth: meta provider callback=%s/api/v1/threads-accounts/oauth/callback", apiBase)
		if strings.HasPrefix(apiBase, "http://") {
			logx.Error("threads oauth: callback is HTTP — Meta will block (use https PublicAPIBase / PublicWebBase)")
		}
	} else {
		cb := apiBase + "/api/v1/threads-accounts/oauth/callback"
		provider = &threadsProv.FakeProvider{CallbackBase: cb}
		logx.Info("threads oauth: fake provider (set Platform.ThreadsAppId/Secret for Meta)")
	}
	svc := threadsUC.New(repo, provider, secret)
	svc.APIPublicBase = apiBase
	svc.WebBase = web
	svc.CallbackPath = "/api/v1/threads-accounts/oauth/callback"
	return svc
}

func newStorage(c config.Config) fsDomain.Storage {
	os := c.ObjectStorage
	if strings.TrimSpace(os.Endpoint) == "" {
		logx.Error("object storage: Endpoint empty — uploads disabled (MinIO/S3 required)")
		return noop.New()
	}
	s, err := s3store.New(s3store.Config{
		Endpoint: os.Endpoint, Region: os.Region, Bucket: os.Bucket,
		AccessKey: os.AccessKey, SecretKey: os.SecretKey,
		UsePathStyle: os.UsePathStyle, PublicBaseURL: os.PublicBaseURL,
	})
	if err != nil {
		logx.Errorf("object storage MinIO/S3 init failed: %v — uploads disabled", err)
		return noop.New()
	}
	logx.Infof("object storage: minio/s3 endpoint=%s bucket=%s", os.Endpoint, os.Bucket)
	return s
}

func newNotification(c config.Config) notifDomain.UseCase {
	base := strings.TrimRight(c.PublicWebBase, "/")
	if base == "" {
		base = "http://127.0.0.1:5173"
	}
	brand := notifDomain.Brand{
		Name: c.Brand.Name, Link: base, LogoURL: c.Brand.LogoURL, Copyright: c.Brand.Copyright,
	}
	if brand.Name == "" {
		brand.Name = "Harbor Desk"
	}
	if brand.LogoURL == "" {
		brand.LogoURL = base + "/brand-mark.jpg"
	}
	if brand.Copyright == "" {
		brand.Copyright = "© Harbor Desk"
	}
	cfg := notifUC.Config{
		Sender:        c.Mail.Sender,
		DevExposeCode: c.Mail.DevExposeCode,
		Brand:         brand,
	}
	if c.Mail.SMTP.Host != "" {
		cfg.Providers = []notifDomain.EmailDelivery{
			notifUC.NewSMTPDelivery(notifUC.SMTPConfig{
				Host: c.Mail.SMTP.Host, Port: c.Mail.SMTP.Port,
				User: c.Mail.SMTP.User, Password: c.Mail.SMTP.Password,
			}),
		}
		logx.Infof("notification mail: smtp host=%s port=%d logo=%s expose_code=%v",
			c.Mail.SMTP.Host, c.Mail.SMTP.Port, brand.LogoURL, c.Mail.DevExposeCode)
	} else {
		cfg.Providers = []notifDomain.EmailDelivery{notifUC.NewLogDelivery()}
		logx.Info("notification mail: log-only (set Mail.SMTP.Host to send real email)")
	}
	return notifUC.NewService(cfg)
}

type errString string

func (e errString) Error() string { return string(e) }

// metaMediaBridge adapts threads MetaProvider → studio.ThreadsMediaSource
type metaMediaBridge struct {
	Meta *threadsProv.MetaProvider
}

func (b *metaMediaBridge) ListThreads(ctx context.Context, accessToken string, limit int) ([]studioUC.FetchedThread, error) {
	list, err := b.Meta.ListThreads(ctx, accessToken, limit)
	if err != nil {
		return nil, err
	}
	out := make([]studioUC.FetchedThread, 0, len(list))
	for _, t := range list {
		pub := int64(0)
		if !t.Timestamp.IsZero() {
			pub = t.Timestamp.UnixNano()
		}
		out = append(out, studioUC.FetchedThread{
			ID: t.ID, Text: t.Text, MediaType: t.MediaType, MediaURL: t.MediaURL,
			ThumbnailURL: t.ThumbnailURL, Permalink: t.Permalink, Shortcode: t.Shortcode,
			TopicTag: t.TopicTag, Username: t.Username, PublishedAt: pub,
		})
	}
	return out, nil
}

func (b *metaMediaBridge) GetInsights(ctx context.Context, accessToken, mediaID string) (studioUC.FetchedInsights, error) {
	ins, err := b.Meta.GetInsights(ctx, accessToken, mediaID)
	if err != nil {
		return studioUC.FetchedInsights{Status: "error", ErrorMsg: err.Error()}, nil
	}
	return studioUC.FetchedInsights{
		Views: ins.Views, Likes: ins.Likes, Replies: ins.Replies, Reposts: ins.Reposts,
		Quotes: ins.Quotes, Shares: ins.Shares, Status: ins.Status, ErrorMsg: ins.ErrorMsg,
	}, nil
}

func (b *metaMediaBridge) ListConversation(ctx context.Context, accessToken, mediaID string, limit int) ([]studioUC.FetchedReply, error) {
	list, err := b.Meta.ListConversation(ctx, accessToken, mediaID, limit)
	if err != nil {
		return nil, nil
	}
	out := make([]studioUC.FetchedReply, 0, len(list))
	for _, r := range list {
		pub := int64(0)
		if !r.Timestamp.IsZero() {
			pub = r.Timestamp.UnixNano()
		}
		out = append(out, studioUC.FetchedReply{
			ID: r.ID, Text: r.Text, Username: r.Username, ParentMediaID: r.ParentMediaID,
			PublishedAt: pub, IsMine: r.IsMine, LikeCount: r.LikeCount,
		})
	}
	return out, nil
}

func (b *metaMediaBridge) ListMentions(ctx context.Context, accessToken, threadsUserID string, limit int) ([]studioUC.FetchedMention, error) {
	list, err := b.Meta.ListMentions(ctx, accessToken, threadsUserID, limit)
	if err != nil {
		return nil, err
	}
	out := make([]studioUC.FetchedMention, 0, len(list))
	for _, m := range list {
		pub := int64(0)
		if !m.Timestamp.IsZero() {
			pub = m.Timestamp.UnixNano()
		}
		out = append(out, studioUC.FetchedMention{
			ID: m.ID, Text: m.Text, Username: m.Username, Permalink: m.Permalink,
			RootPostID: m.RootPostID, ParentID: m.ParentID,
			IsReply: m.IsReply, IsQuotePost: m.IsQuotePost, PublishedAt: pub,
		})
	}
	return out, nil
}

func (b *metaMediaBridge) ListProfilePosts(ctx context.Context, accessToken, username string, limit int) ([]studioUC.FetchedThread, error) {
	list, err := b.Meta.ListProfilePosts(ctx, accessToken, username, limit)
	if err != nil {
		return nil, err
	}
	out := make([]studioUC.FetchedThread, 0, len(list))
	for _, t := range list {
		pub := int64(0)
		if !t.Timestamp.IsZero() {
			pub = t.Timestamp.UnixNano()
		}
		out = append(out, studioUC.FetchedThread{
			ID: t.ID, Text: t.Text, MediaType: t.MediaType, MediaURL: t.MediaURL,
			ThumbnailURL: t.ThumbnailURL, Permalink: t.Permalink, Shortcode: t.Shortcode,
			TopicTag: t.TopicTag, Username: t.Username, PublishedAt: pub,
		})
	}
	return out, nil
}

// personaJobBridge adapts job.Service → studio.PersonaAnalyzeScheduler (jobID only).
type personaJobBridge struct {
	Jobs *jobUC.Service
}

func (b *personaJobBridge) SchedulePersonaAnalyzeAccount(ctx context.Context, ownerUID int64, personaID, username, lang string) (string, error) {
	if b == nil || b.Jobs == nil {
		return "", fmt.Errorf("jobs not configured")
	}
	j, err := b.Jobs.SchedulePersonaAnalyzeAccount(ctx, ownerUID, personaID, username, lang)
	if err != nil {
		return "", err
	}
	return j.ID, nil
}

func (b *personaJobBridge) SchedulePersonaAnalyzeText(ctx context.Context, ownerUID int64, personaID, rawText, sourceLabel, lang string) (string, error) {
	if b == nil || b.Jobs == nil {
		return "", fmt.Errorf("jobs not configured")
	}
	j, err := b.Jobs.SchedulePersonaAnalyzeText(ctx, ownerUID, personaID, rawText, sourceLabel, lang)
	if err != nil {
		return "", err
	}
	return j.ID, nil
}

// studioAIKeys adapts member settings + usage key resolver for persona LLM.
type studioAIKeys struct {
	Members  memberDomain.Repository
	Resolver *usageUC.SettingsResolver
}

func (k *studioAIKeys) ResolveAI(ctx context.Context, ownerUID int64) (provider, model, apiKey string, err error) {
	st, err := k.Members.GetSettings(ctx, ownerUID)
	if err != nil || st == nil {
		st = memberDomain.DefaultSettings(ownerUID)
	}
	// 完全依會員 AI 設定，不寫死／不替換模型 id
	provider = ai.NormalizeProvider(st.Provider)
	model = strings.TrimSpace(st.Model)
	if model == "" {
		return provider, "", "", fmt.Errorf("請到設定選擇 AI 模型")
	}
	if k.Resolver != nil {
		_, key, rerr := k.Resolver.ResolveKey(ctx, ownerUID, usageDomain.MeterAICopy)
		if rerr == nil && strings.TrimSpace(key) != "" {
			return provider, model, key, nil
		}
	}
	// BYOK direct
	if key := st.KeyForProvider(provider); key != "" {
		return provider, model, key, nil
	}
	return provider, model, "", fmt.Errorf("no AI key（請到設定填寫 Key，或確認平台已配置）")
}

// inspirePersonaBridge — studio 人設 → 靈感 prompt 完整快照
type inspirePersonaBridge struct {
	Studio *studioUC.Service
}

func (b *inspirePersonaBridge) ResolvePersona(ctx context.Context, ownerUID int64, personaID string) (*inspireUC.PersonaSnapshot, error) {
	if b == nil || b.Studio == nil {
		return nil, nil
	}
	if strings.TrimSpace(personaID) != "" {
		if got, err := b.Studio.GetPersona(ctx, ownerUID, personaID); err == nil && got != nil {
			return studioPersonaToSnapshot(got), nil
		}
	}
	if aid, err := b.Studio.GetActivePersonaID(ctx, ownerUID); err == nil && aid != "" {
		if got, gerr := b.Studio.GetPersona(ctx, ownerUID, aid); gerr == nil && got != nil {
			return studioPersonaToSnapshot(got), nil
		}
	}
	list, err := b.Studio.ListPersonas(ctx, ownerUID)
	if err != nil || len(list) == 0 {
		return nil, nil
	}
	return studioPersonaToSnapshot(list[0]), nil
}

func studioPersonaToSnapshot(p *studioDomain.Persona) *inspireUC.PersonaSnapshot {
	if p == nil {
		return nil
	}
	fp := strings.TrimSpace(p.Style.DraftText)
	if fp == "" {
		fp = serializePersonaDraft(p.Style.Draft)
	}
	dims := map[string]string{}
	for k, d := range p.Style.Dimensions {
		if sm := strings.TrimSpace(d.Summary); sm != "" {
			dims[k] = sm
		}
	}
	avoid := append([]string{}, p.Guard.Avoid...)
	return &inspireUC.PersonaSnapshot{
		ID: p.ID, Name: p.Name, Brief: p.Brief, Status: p.Status,
		DraftText: fp, Voice: p.Voice, GuardAvoid: avoid,
		MaxChars: p.Guard.MaxChars, BanAiTone: p.Guard.BanAiTone,
		DimSummaries: dims,
	}
}

func serializePersonaDraft(d studioDomain.PersonaDraft) string {
	type pair struct{ label, value string }
	parts := []pair{
		{"我是誰", d.Identity},
		{"語氣", d.Tone},
		{"對誰說", d.Audience},
		{"開場鉤子", d.Hooks},
		{"語言指紋", d.LanguageFingerprint},
		{"節奏", d.Rhythm},
		{"標點", d.Punctuation},
		{"內容套路", d.ContentPatterns},
		{"知識轉譯", d.KnowledgeTranslation},
		{"CTA", d.CtaStyle},
		{"像他會說的話", d.Examples},
		{"絕不怎麼說", d.Avoid},
	}
	var lines []string
	for _, p := range parts {
		v := strings.TrimSpace(p.value)
		if v == "" {
			continue
		}
		lines = append(lines, "【"+p.label+"】\n"+v)
	}
	return strings.Join(lines, "\n\n")
}

// inspireBrandBridge — scout 品牌／產品目錄
type inspireBrandBridge struct {
	Scout *scoutUC.Service
}

func (b *inspireBrandBridge) ListCatalog(ctx context.Context, ownerUID int64) ([]inspireUC.BrandSnapshot, error) {
	if b == nil || b.Scout == nil {
		return nil, nil
	}
	brands, err := b.Scout.ListBrands(ctx, ownerUID)
	if err != nil {
		return nil, err
	}
	out := make([]inspireUC.BrandSnapshot, 0, len(brands))
	for _, br := range brands {
		if br == nil {
			continue
		}
		snap := inspireUC.BrandSnapshot{
			ID: br.ID, DisplayName: br.DisplayName, Brief: br.Brief,
			Audience: br.TargetAudience, Goals: br.Goals,
		}
		prods, _ := b.Scout.ListProducts(ctx, ownerUID, br.ID)
		for _, pr := range prods {
			if pr == nil {
				continue
			}
			snap.Products = append(snap.Products, inspireUC.ProductSnapshot{
				ID: pr.ID, Label: pr.Label, Context: pr.ProductContext,
				Tags: append([]string{}, pr.MatchTags...),
				Pains: append([]string{}, pr.PainPoints...),
			})
		}
		out = append(out, snap)
	}
	return out, nil
}