package catalog

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"strings"

	"github.com/descrybe/descrybe-v2/apps/api/internal/company"
	"github.com/google/uuid"
	"github.com/jackc/pgx/v5"
	"github.com/jackc/pgx/v5/pgxpool"
)

// exactTotalFromPage returns an exact total when the page itself proves the
// result set size: a short page (fewer rows than limit) means there are no
// further rows, except an empty page past offset 0 which may be beyond EOF.
func exactTotalFromPage(offset, limit, pageLen int) (int64, bool) {
	if limit <= 0 {
		return 0, false
	}
	if pageLen < limit && (offset == 0 || pageLen > 0) {
		return int64(offset + pageLen), true
	}
	return 0, false
}

// parallelCountAndList runs count and page queries concurrently. When the
// page is short enough to prove the exact total, the count query is cancelled
// so huge-table COUNT(*) can abort early. Safe when both share the same WHERE
// args and do not mutate shared slices.
func parallelCountAndList(
	ctx context.Context,
	limit, offset int,
	countFn func(context.Context) (int64, error),
	listFn func(context.Context) ([]map[string]any, error),
) ([]map[string]any, int64, error) {
	type countRes struct {
		n   int64
		err error
	}
	type listRes struct {
		items []map[string]any
		err   error
	}
	countCtx, cancelCount := context.WithCancel(ctx)
	defer cancelCount()
	countCh := make(chan countRes, 1)
	listCh := make(chan listRes, 1)
	go func() {
		n, err := countFn(countCtx)
		countCh <- countRes{n: n, err: err}
	}()
	go func() {
		items, err := listFn(ctx)
		listCh <- listRes{items: items, err: err}
	}()
	lr := <-listCh
	if lr.err != nil {
		cancelCount()
		<-countCh
		return nil, 0, lr.err
	}
	if total, ok := exactTotalFromPage(offset, limit, len(lr.items)); ok {
		cancelCount()
		<-countCh
		return lr.items, total, nil
	}
	cr := <-countCh
	if cr.err != nil {
		return nil, 0, cr.err
	}
	return lr.items, cr.n, nil
}

type Service struct {
	Pool *pgxpool.Pool
}

func (s *Service) ListCategories(ctx context.Context, companyID uuid.UUID, f ListFilter) ([]map[string]any, int64, error) {
	f = NormalizeListFilter(f)
	args := []any{companyID}
	where := []string{"company_id = $1"}
	if f.Query != "" {
		args = append(args, "%"+f.Query+"%")
		n := len(args)
		where = append(where, fmt.Sprintf("(name ILIKE $%d OR unique_id ILIKE $%d OR COALESCE(path, '') ILIKE $%d)", n, n, n))
	}
	wSQL := strings.Join(where, " AND ")
	args = append(args, f.Limit, f.Offset)
	lim := len(args) - 1
	off := len(args)
	rows, err := s.Pool.Query(ctx, fmt.Sprintf(`
		SELECT id, name, unique_id, parent_unique_id, path, level, position, is_active, description,
			title_template, description_template,
			(title_template IS NOT NULL AND jsonb_typeof(title_template) = 'object'
				AND COALESCE(jsonb_array_length(title_template->'elements'), 0) > 0) AS has_title_formula,
			(description_template IS NOT NULL AND jsonb_typeof(description_template) = 'object'
				AND COALESCE(jsonb_array_length(description_template->'sections'), 0) > 0) AS has_description_formula,
			(EXISTS (
				SELECT 1 FROM jsonb_each_text(COALESCE(prompt, '{}'::jsonb)) kv
				WHERE length(trim(kv.value)) > 0
			)) AS has_prompt,
			created_at, updated_at
		FROM categories WHERE %s
		ORDER BY path NULLS LAST, position, name
		LIMIT $%d OFFSET $%d`, wSQL, lim, off), args...)
	if err != nil {
		return nil, 0, err
	}
	defer rows.Close()
	items, err := scanMaps(rows, []string{
		"id", "name", "unique_id", "parent_unique_id", "path", "level", "position", "is_active", "description",
		"title_template", "description_template", "has_title_formula", "has_description_formula", "has_prompt",
		"created_at", "updated_at",
	})
	if err != nil {
		return nil, 0, err
	}
	if total, ok := exactTotalFromPage(f.Offset, f.Limit, len(items)); ok {
		return items, total, nil
	}
	countArgs := args[:len(args)-2]
	var total int64
	if err := s.Pool.QueryRow(ctx, `SELECT count(*) FROM categories WHERE `+wSQL, countArgs...).Scan(&total); err != nil {
		return nil, 0, err
	}
	return items, total, nil
}

func (s *Service) CreateCategory(ctx context.Context, companyID uuid.UUID, name, uniqueID string, parent *string, desc *string) (map[string]any, error) {
	name = strings.TrimSpace(name)
	uniqueID = strings.TrimSpace(uniqueID)
	if name == "" || uniqueID == "" {
		return nil, ClientMsg("name and unique_id required")
	}
	path := uniqueID
	level := 0
	if parent != nil && strings.TrimSpace(*parent) != "" {
		p := strings.TrimSpace(*parent)
		var parentPath *string
		var parentLevel int
		err := s.Pool.QueryRow(ctx, `
			SELECT path, level FROM categories
			WHERE company_id = $1 AND unique_id = $2`, companyID, p).
			Scan(&parentPath, &parentLevel)
		if err != nil {
			if errors.Is(err, pgx.ErrNoRows) {
				return nil, ClientMsg("parent category not found")
			}
			return nil, err
		}
		if parentPath != nil && *parentPath != "" {
			path = *parentPath + "/" + uniqueID
		} else {
			path = p + "/" + uniqueID
		}
		level = parentLevel + 1
		parent = &p
	}
	var id uuid.UUID
	err := s.Pool.QueryRow(ctx, `
		INSERT INTO categories (company_id, name, unique_id, parent_unique_id, description, path, level)
		VALUES ($1, $2, $3, $4, $5, $6, $7)
		RETURNING id`, companyID, name, uniqueID, parent, desc, path, level).Scan(&id)
	if err != nil {
		return nil, err
	}
	return s.GetCategory(ctx, companyID, id)
}

func (s *Service) GetCategory(ctx context.Context, companyID, id uuid.UUID) (map[string]any, error) {
	row := s.Pool.QueryRow(ctx, `
		SELECT id, name, unique_id, parent_unique_id, path, level, position, is_active, description,
			COALESCE(prompt, '{}'::jsonb) AS prompts,
			(EXISTS (
				SELECT 1 FROM jsonb_each_text(COALESCE(prompt, '{}'::jsonb)) kv
				WHERE length(trim(kv.value)) > 0
			)) AS has_prompt,
			title_template, description_template, created_at, updated_at
		FROM categories WHERE id = $1 AND company_id = $2`, id, companyID)
	item, err := scanMap(row, []string{
		"id", "name", "unique_id", "parent_unique_id", "path", "level", "position", "is_active", "description",
		"prompts", "has_prompt", "title_template", "description_template", "created_at", "updated_at",
	})
	if err != nil {
		return nil, err
	}
	return enrichCategoryPrompts(ctx, s.Pool, companyID, item)
}

func (s *Service) UpdateTitleFormula(ctx context.Context, companyID, id uuid.UUID, template any) (map[string]any, error) {
	b, err := json.Marshal(template)
	if err != nil {
		return nil, ClientMsg("invalid title_template")
	}
	ct, err := s.Pool.Exec(ctx, `
		UPDATE categories SET title_template = $3::jsonb, updated_at = now()
		WHERE id = $1 AND company_id = $2`, id, companyID, string(b))
	if err != nil {
		return nil, err
	}
	if ct.RowsAffected() == 0 {
		return nil, ErrNotFound
	}
	return s.GetCategory(ctx, companyID, id)
}

func (s *Service) UpdateDescriptionFormula(ctx context.Context, companyID, id uuid.UUID, template any) (map[string]any, error) {
	b, err := json.Marshal(template)
	if err != nil {
		return nil, ClientMsg("invalid description_template")
	}
	ct, err := s.Pool.Exec(ctx, `
		UPDATE categories SET description_template = $3::jsonb, updated_at = now()
		WHERE id = $1 AND company_id = $2`, id, companyID, string(b))
	if err != nil {
		return nil, err
	}
	if ct.RowsAffected() == 0 {
		return nil, ErrNotFound
	}
	return s.GetCategory(ctx, companyID, id)
}

// MaxCategoryPromptRunes bounds per-category AI generation prompts.
const MaxCategoryPromptRunes = 8000

// UpdateCategoryPrompt sets per-language AI enhance user prompts for a category.
// Empty map (or all-empty values) clears overrides (company/built-in template applies).
func (s *Service) UpdateCategoryPrompt(ctx context.Context, companyID, id uuid.UUID, prompts map[string]string) (map[string]any, error) {
	cleaned, err := company.SanitizeLangPromptMap(prompts, MaxCategoryPromptRunes)
	if err != nil {
		return nil, ClientMsg(err.Error())
	}
	raw, err := company.EncodeLangPromptMap(cleaned)
	if err != nil {
		return nil, err
	}
	ct, err := s.Pool.Exec(ctx, `
		UPDATE categories SET prompt = $3::jsonb, updated_at = now()
		WHERE id = $1 AND company_id = $2`, id, companyID, string(raw))
	if err != nil {
		return nil, err
	}
	if ct.RowsAffected() == 0 {
		return nil, ErrNotFound
	}
	return s.GetCategory(ctx, companyID, id)
}

func enrichCategoryPrompts(ctx context.Context, pool *pgxpool.Pool, companyID uuid.UUID, item map[string]any) (map[string]any, error) {
	if item == nil {
		return nil, ErrNotFound
	}
	prompts, err := company.DecodeLangPromptMap(item["prompts"])
	if err != nil {
		prompts = company.LangPromptMap{}
	}
	primary := company.LoadLanguage(ctx, pool, companyID)
	item["prompts"] = prompts
	item["prompt"] = company.PromptForLanguage(prompts, primary, primary)
	item["has_prompt"] = company.HasAnyPrompt(prompts)
	return item, nil
}

func (s *Service) ListVariables(ctx context.Context, companyID uuid.UUID, f ListFilter) ([]map[string]any, int64, error) {
	f = NormalizeListFilter(f)
	rows, err := s.Pool.Query(ctx, `
		SELECT id, name, value, description, created_at, updated_at
		FROM custom_variables WHERE company_id = $1
		ORDER BY name LIMIT $2 OFFSET $3`, companyID, f.Limit, f.Offset)
	if err != nil {
		return nil, 0, err
	}
	defer rows.Close()
	items, err := scanMaps(rows, []string{"id", "name", "value", "description", "created_at", "updated_at"})
	if err != nil {
		return nil, 0, err
	}
	if total, ok := exactTotalFromPage(f.Offset, f.Limit, len(items)); ok {
		return items, total, nil
	}
	var total int64
	if err := s.Pool.QueryRow(ctx, `SELECT count(*) FROM custom_variables WHERE company_id = $1`, companyID).Scan(&total); err != nil {
		return nil, 0, err
	}
	return items, total, nil
}

func (s *Service) CreateVariable(ctx context.Context, companyID uuid.UUID, name, value string, description *string) (map[string]any, error) {
	name = strings.TrimSpace(name)
	if name == "" {
		return nil, ClientMsg("name required")
	}
	var id uuid.UUID
	err := s.Pool.QueryRow(ctx, `
		INSERT INTO custom_variables (company_id, name, value, description)
		VALUES ($1, $2, $3, $4) RETURNING id`, companyID, name, value, description).Scan(&id)
	if err != nil {
		return nil, err
	}
	return s.getVariable(ctx, companyID, id)
}

func (s *Service) DeleteVariable(ctx context.Context, companyID, id uuid.UUID) error {
	ct, err := s.Pool.Exec(ctx, `DELETE FROM custom_variables WHERE id = $1 AND company_id = $2`, id, companyID)
	if err != nil {
		return err
	}
	if ct.RowsAffected() == 0 {
		return ErrNotFound
	}
	return nil
}

func (s *Service) getVariable(ctx context.Context, companyID, id uuid.UUID) (map[string]any, error) {
	row := s.Pool.QueryRow(ctx, `
		SELECT id, name, value, description, created_at, updated_at
		FROM custom_variables WHERE id = $1 AND company_id = $2`, id, companyID)
	return scanMap(row, []string{"id", "name", "value", "description", "created_at", "updated_at"})
}

func (s *Service) UpdateCategory(ctx context.Context, companyID, id uuid.UUID, body map[string]any) (map[string]any, error) {
	name, _ := body["name"].(string)
	desc, _ := body["description"].(string)
	var isActive *bool
	if v, ok := body["is_active"].(bool); ok {
		isActive = &v
	}
	_, err := s.Pool.Exec(ctx, `
		UPDATE categories SET
			name = CASE WHEN $3 <> '' THEN $3 ELSE name END,
			description = CASE WHEN $4 <> '' THEN $4 ELSE description END,
			is_active = COALESCE($5, is_active),
			updated_at = now()
		WHERE id = $1 AND company_id = $2`, id, companyID, name, desc, isActive)
	if err != nil {
		return nil, err
	}
	return s.GetCategory(ctx, companyID, id)
}

func (s *Service) DeleteCategory(ctx context.Context, companyID, id uuid.UUID) error {
	_, err := s.Pool.Exec(ctx, `DELETE FROM categories WHERE id = $1 AND company_id = $2`, id, companyID)
	return err
}

// DeleteCategoryByUniqueID deletes a category by its unique_id (legacy public DELETE path).
func (s *Service) DeleteCategoryByUniqueID(ctx context.Context, companyID uuid.UUID, uniqueID string) error {
	uniqueID = strings.TrimSpace(uniqueID)
	if uniqueID == "" {
		return ClientMsg("invalid category id")
	}
	ct, err := s.Pool.Exec(ctx, `
		DELETE FROM categories WHERE company_id = $1 AND unique_id = $2`, companyID, uniqueID)
	if err != nil {
		return err
	}
	if ct.RowsAffected() == 0 {
		return ErrNotFound
	}
	return nil
}

func (s *Service) ListAttributes(ctx context.Context, companyID uuid.UUID, f ListFilter) ([]map[string]any, int64, error) {
	f = NormalizeListFilter(f)
	args := []any{companyID}
	where := []string{"a.company_id = $1"}
	from := "attributes a"
	selectCols := "a.id, a.attribute_key, a.name, a.value_type, a.unit, a.example, a.parent_key, a.created_at, a.updated_at"
	scanCols := []string{"id", "attribute_key", "name", "value_type", "unit", "example", "parent_key", "created_at", "updated_at"}
	if f.Category != "" {
		from = `attributes a
			INNER JOIN category_attributes ca
				ON ca.attribute_id = a.id AND ca.company_id = a.company_id`
		args = append(args, f.Category)
		where = append(where, fmt.Sprintf("ca.category_unique_id = $%d", len(args)))
		selectCols += ", ca.required, ca.category_unique_id"
		scanCols = append(scanCols, "required", "category_unique_id")
	}
	if f.RootsOnly {
		where = append(where, "a.parent_key IS NULL")
	}
	if f.ParentKey != "" {
		args = append(args, f.ParentKey)
		where = append(where, fmt.Sprintf("a.parent_key = $%d", len(args)))
	}
	if f.Query != "" {
		args = append(args, "%"+f.Query+"%")
		n := len(args)
		where = append(where, fmt.Sprintf("(a.name ILIKE $%d OR a.attribute_key ILIKE $%d OR COALESCE(a.parent_key, '') ILIKE $%d)", n, n, n))
	}
	wSQL := strings.Join(where, " AND ")
	args = append(args, f.Limit, f.Offset)
	lim := len(args) - 1
	off := len(args)
	rows, err := s.Pool.Query(ctx, fmt.Sprintf(`
		SELECT %s
		FROM %s WHERE %s
		ORDER BY a.name
		LIMIT $%d OFFSET $%d`, selectCols, from, wSQL, lim, off), args...)
	if err != nil {
		return nil, 0, err
	}
	defer rows.Close()
	items, err := scanMaps(rows, scanCols)
	if err != nil {
		return nil, 0, err
	}
	if total, ok := exactTotalFromPage(f.Offset, f.Limit, len(items)); ok {
		return items, total, nil
	}
	countArgs := args[:len(args)-2]
	var total int64
	if err := s.Pool.QueryRow(ctx, fmt.Sprintf(`SELECT count(*) FROM %s WHERE %s`, from, wSQL), countArgs...).Scan(&total); err != nil {
		return nil, 0, err
	}
	return items, total, nil
}

var attributeValueTypes = map[string]struct{}{
	"string": {}, "number": {}, "boolean": {}, "date": {}, "list": {}, "multiselect": {},
}

func (s *Service) CreateAttribute(ctx context.Context, companyID uuid.UUID, key, name, valueType string, unit, example, parent *string) (map[string]any, error) {
	if key == "" || name == "" {
		return nil, ClientMsg("attribute_key and name required")
	}
	if valueType == "" {
		valueType = "string"
	}
	if _, ok := attributeValueTypes[valueType]; !ok {
		return nil, ClientMsg("value_type must be one of: string, number, boolean, date, list, multiselect")
	}
	var id uuid.UUID
	err := s.Pool.QueryRow(ctx, `
		INSERT INTO attributes (company_id, attribute_key, name, value_type, unit, example, parent_key)
		VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING id`,
		companyID, key, name, valueType, unit, example, parent).Scan(&id)
	if err != nil {
		return nil, err
	}
	return s.getAttribute(ctx, companyID, id)
}

func (s *Service) getAttribute(ctx context.Context, companyID, id uuid.UUID) (map[string]any, error) {
	row := s.Pool.QueryRow(ctx, `
		SELECT id, attribute_key, name, value_type, unit, example, parent_key, created_at, updated_at
		FROM attributes WHERE id = $1 AND company_id = $2`, id, companyID)
	return scanMap(row, []string{"id", "attribute_key", "name", "value_type", "unit", "example", "parent_key", "created_at", "updated_at"})
}

func (s *Service) UpdateAttribute(ctx context.Context, companyID, id uuid.UUID, body map[string]any) (map[string]any, error) {
	name, _ := body["name"].(string)
	valueType, _ := body["value_type"].(string)
	valueType = strings.TrimSpace(valueType)
	if valueType != "" {
		if _, ok := attributeValueTypes[valueType]; !ok {
			return nil, ClientMsg("value_type must be one of: string, number, boolean, date, list, multiselect")
		}
	}
	unit := optionalStringPtr(body, "unit")
	example := optionalStringPtr(body, "example")
	_, err := s.Pool.Exec(ctx, `
		UPDATE attributes SET
			name = CASE WHEN $3 <> '' THEN $3 ELSE name END,
			value_type = CASE WHEN $4 <> '' THEN $4 ELSE value_type END,
			unit = CASE WHEN $5::boolean THEN $6 ELSE unit END,
			example = CASE WHEN $7::boolean THEN $8 ELSE example END,
			updated_at = now()
		WHERE id = $1 AND company_id = $2`,
		id, companyID, name, valueType,
		unit != nil, nullableString(unit),
		example != nil, nullableString(example))
	if err != nil {
		return nil, err
	}
	return s.getAttribute(ctx, companyID, id)
}

func optionalStringPtr(body map[string]any, key string) *string {
	v, ok := body[key]
	if !ok {
		return nil
	}
	if v == nil {
		empty := ""
		return &empty
	}
	s, ok := v.(string)
	if !ok {
		return nil
	}
	return &s
}

func nullableString(p *string) any {
	if p == nil {
		return nil
	}
	if *p == "" {
		return nil
	}
	return *p
}

func (s *Service) DeleteAttribute(ctx context.Context, companyID, id uuid.UUID) error {
	ct, err := s.Pool.Exec(ctx, `DELETE FROM attributes WHERE id = $1 AND company_id = $2`, id, companyID)
	if err != nil {
		return err
	}
	if ct.RowsAffected() == 0 {
		return ErrNotFound
	}
	return nil
}

// ListFilter is the shared SQL pagination/search filter for catalog list APIs
// (categories, attributes, products). Product-only fields may be left empty.
type ListFilter struct {
	Query    string
	Status   string
	Category string
	FeedID   string // optional UUID; filters raw/processed products by feed
	// Coverage filters processed products by enrichment completeness:
	// complete | incomplete | missing_name | missing_description | missing_attributes | missing_category.
	Coverage string
	// Eprel filters processed products by mapped EPREL id presence: has_eprel | no_eprel.
	Eprel string
	// SyncChange filters by raw mapped_data._sync_changes from the latest modifying feed sync:
	// price | stock | availability | title | other | new | any.
	SyncChange string
	SortBy     string // updatedAt | name (products list)
	SortOrder  string // asc | desc
	Limit      int
	Offset     int
	// Cursor is an opaque keyset bookmark (preferred over Offset for deep pages).
	Cursor string
	// AfterID is a product UUID keyset bookmark; resolved to sort keys server-side.
	// When Cursor is also set, Cursor wins. Offset is ignored when either is set.
	AfterID string
	// RootsOnly limits attributes to top-level definitions (parent_key IS NULL).
	RootsOnly bool
	// ParentKey limits attributes to children of a list/multiselect attribute.
	ParentKey string
}

// ProductFilter is an alias kept for existing call sites.
type ProductFilter = ListFilter

// Product list pagination bounds (categories/attrs still use NormalizeListFilter's higher cap).
const (
	MaxProductPageLimit    = 200
	MaxOffsetWithoutCursor = 5000
)

func NormalizeListFilter(f ListFilter) ListFilter {
	if f.Limit <= 0 {
		f.Limit = 50
	}
	if f.Limit > 2000 {
		f.Limit = 2000
	}
	if f.Offset < 0 {
		f.Offset = 0
	}
	f.Query = strings.TrimSpace(f.Query)
	f.Status = strings.TrimSpace(f.Status)
	f.Category = strings.TrimSpace(f.Category)
	f.FeedID = strings.TrimSpace(f.FeedID)
	f.Coverage = normalizeCoverageFilter(f.Coverage)
	f.Eprel = normalizeEprelFilter(f.Eprel)
	f.SyncChange = normalizeSyncChangeFilter(f.SyncChange)
	f.ParentKey = strings.TrimSpace(f.ParentKey)
	f.Cursor = strings.TrimSpace(f.Cursor)
	f.AfterID = strings.TrimSpace(f.AfterID)
	f.SortBy = strings.TrimSpace(f.SortBy)
	f.SortOrder = strings.ToLower(strings.TrimSpace(f.SortOrder))
	switch f.SortBy {
	case "name", "updatedAt", "createdAt":
		// keep
	default:
		f.SortBy = "updatedAt"
	}
	if f.SortOrder != "asc" {
		f.SortOrder = "desc"
	}
	if HasProductCursor(f) {
		f.Offset = 0
	}
	return f
}

// normalizeProductListFilter caps product pages and rejects deep OFFSET without a keyset cursor.
func normalizeProductListFilter(f ListFilter) (ListFilter, error) {
	f = NormalizeListFilter(f)
	if f.Limit > MaxProductPageLimit {
		f.Limit = MaxProductPageLimit
	}
	if !HasProductCursor(f) && f.Offset > MaxOffsetWithoutCursor {
		return f, ClientMsg("offset too large; use cursor or after_id for deep pages")
	}
	return f, nil
}

func productSortDir(order string) string {
	if strings.EqualFold(order, "asc") {
		return "ASC"
	}
	return "DESC"
}

func processedProductsOrderBy(f ListFilter) string {
	dir := productSortDir(f.SortOrder)
	if f.SortBy == "name" {
		return fmt.Sprintf(
			`(CASE WHEN COALESCE(NULLIF(p.processed_name, ''), NULLIF(p.name, '')) IS NULL THEN 1 ELSE 0 END),
			LOWER(COALESCE(NULLIF(p.processed_name, ''), NULLIF(p.name, ''), p.product_id)) %s, p.id %s`,
			dir, dir,
		)
	}
	if f.SortBy == "createdAt" {
		return fmt.Sprintf("p.created_at %s, p.id %s", dir, dir)
	}
	return fmt.Sprintf("p.updated_at %s, p.id %s", dir, dir)
}

func rawProductsOrderBy(f ListFilter) string {
	dir := productSortDir(f.SortOrder)
	if f.SortBy == "name" {
		return fmt.Sprintf(
			`(CASE WHEN COALESCE(NULLIF(rp.mapped_data->>'name', ''), NULLIF(rp.mapped_data->>'title', '')) IS NULL THEN 1 ELSE 0 END),
			LOWER(COALESCE(NULLIF(rp.mapped_data->>'name', ''), NULLIF(rp.mapped_data->>'title', ''), rp.gtin)) %s, rp.id %s`,
			dir, dir,
		)
	}
	if f.SortBy == "updatedAt" {
		return fmt.Sprintf("rp.updated_at %s, rp.id %s", dir, dir)
	}
	return fmt.Sprintf("rp.created_at %s, rp.id %s", dir, dir)
}

func normalizeProductFilter(f ProductFilter) (ProductFilter, error) {
	return normalizeProductListFilter(f)
}

func rawProductsCountFromSQL(needsFeedJoin bool) string {
	if needsFeedJoin {
		return `
		FROM raw_products rp
		LEFT JOIN input_feeds f ON f.id = rp.feed_id`
	}
	return `
		FROM raw_products rp`
}

func processedProductsCountFromSQL(needsRawJoin bool) string {
	if needsRawJoin {
		return `
				FROM processed_products p
				LEFT JOIN raw_products r ON r.id = p.raw_product_id`
	}
	return `
				FROM processed_products p`
}

// Enrichment coverage SQL predicates (alias p = processed_products, r = raw_products).
const (
	// Prefer processed_* so dashboard product fields match V1 process items for the same EAN.
	processedPreferredNameSQL        = `COALESCE(NULLIF(p.processed_name, ''), NULLIF(p.name, ''), NULLIF(r.mapped_data->>'name', ''), NULLIF(r.mapped_data->>'title', ''), '')`
	processedPreferredDescriptionSQL = `COALESCE(NULLIF(p.processed_description, ''), NULLIF(p.description, ''), NULLIF(r.mapped_data->>'description', ''), '')`
	processedHasNameSQL              = `(` + processedPreferredNameSQL + ` <> '')`
	processedHasDescriptionSQL       = `(` + processedPreferredDescriptionSQL + ` <> '')`
	processedHasCategorySQL    = `(COALESCE(NULLIF(p.category, ''), '') <> '' AND lower(p.category) <> 'none')`
	// Resolve display name / canonical unique_id when products store unique_id, UUID id, or name.
	processedCategoryResolveJoin = `
				LEFT JOIN LATERAL (
					SELECT c.name, c.unique_id
					FROM categories c
					WHERE c.company_id = p.company_id
						AND NULLIF(BTRIM(p.category), '') IS NOT NULL
						AND lower(BTRIM(p.category)) <> 'none'
						AND (
						c.unique_id = BTRIM(p.category)
						OR c.id::text = BTRIM(p.category)
						OR lower(c.name) = lower(BTRIM(p.category))
						)
					ORDER BY
						CASE
							WHEN c.unique_id = BTRIM(p.category) THEN 0
							WHEN c.id::text = BTRIM(p.category) THEN 1
							ELSE 2
						END
					LIMIT 1
				) cat ON true`
	// Raw inventory (A1 clean / unprocessed tab): category lives on mapped_data only.
	rawCategoryResolveJoin = `
				LEFT JOIN LATERAL (
					SELECT c.name, c.unique_id
					FROM categories c
					WHERE c.company_id = rp.company_id
						AND NULLIF(BTRIM(rp.mapped_data->>'category'), '') IS NOT NULL
						AND lower(BTRIM(rp.mapped_data->>'category')) <> 'none'
						AND (
						c.unique_id = BTRIM(rp.mapped_data->>'category')
						OR c.id::text = BTRIM(rp.mapped_data->>'category')
						OR lower(c.name) = lower(BTRIM(rp.mapped_data->>'category'))
						)
					ORDER BY
						CASE
							WHEN c.unique_id = BTRIM(rp.mapped_data->>'category') THEN 0
							WHEN c.id::text = BTRIM(rp.mapped_data->>'category') THEN 1
							ELSE 2
						END
					LIMIT 1
				) cat ON true`
)

// Attribute presence: AI bag, original bag, or mapped feed specs/dimensions/eprel/warranty.
// (Assembled as vars so we can OR the pieces without repeating the EXISTS body.)
var (
	processedHasProcessedAttributesSQL = `EXISTS (
						SELECT 1
						FROM jsonb_each(COALESCE(p.processed_attributes, '{}'::jsonb)) AS kv(key, value)
						WHERE (jsonb_typeof(kv.value) = 'string' AND length(trim(both '"' from kv.value::text)) > 0)
						   OR jsonb_typeof(kv.value) IN ('number', 'boolean')
						   OR (jsonb_typeof(kv.value) = 'object' AND COALESCE(NULLIF(kv.value->>'name', ''), NULLIF(kv.value->>'value', ''), '') <> '')
						   OR (jsonb_typeof(kv.value) = 'array' AND jsonb_array_length(kv.value) > 0)
					)`
	processedHasOriginalAttributesSQL = `EXISTS (
						SELECT 1
						FROM jsonb_each(COALESCE(p.attributes, '{}'::jsonb)) AS kv(key, value)
						WHERE (jsonb_typeof(kv.value) = 'string' AND length(trim(both '"' from kv.value::text)) > 0)
						   OR jsonb_typeof(kv.value) IN ('number', 'boolean')
						   OR (jsonb_typeof(kv.value) = 'object' AND COALESCE(NULLIF(kv.value->>'name', ''), NULLIF(kv.value->>'value', ''), '') <> '')
						   OR (jsonb_typeof(kv.value) = 'array' AND jsonb_array_length(kv.value) > 0)
					)`
	processedHasFeedAttributesSQL = `(
						CASE jsonb_typeof(r.mapped_data->'specifications')
							WHEN 'string' THEN length(trim(r.mapped_data->>'specifications')) > 0
							WHEN 'object' THEN r.mapped_data->'specifications' <> '{}'::jsonb
							WHEN 'array' THEN jsonb_array_length(r.mapped_data->'specifications') > 0
							ELSE false
						END
						OR CASE jsonb_typeof(r.mapped_data->'specs')
							WHEN 'string' THEN length(trim(r.mapped_data->>'specs')) > 0
							WHEN 'object' THEN r.mapped_data->'specs' <> '{}'::jsonb
							WHEN 'array' THEN jsonb_array_length(r.mapped_data->'specs') > 0
							ELSE false
						END
						OR COALESCE(NULLIF(trim(r.mapped_data->>'eprel_id'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'eprel'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'netwidth'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'net_width'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'netheight'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'net_height'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'netdepth'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'net_depth'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'netmass'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'net_mass'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'warranty'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'productmodel'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'product_model'), ''), '') <> ''
					)`
	processedHasAttributesSQL = `(` + processedHasProcessedAttributesSQL + ` OR ` + processedHasOriginalAttributesSQL + ` OR ` + processedHasFeedAttributesSQL + `)`
	processedHasEprelSQL      = `(
						COALESCE(NULLIF(trim(r.mapped_data->>'eprel_id'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'eprel'), ''), '') <> ''
						OR COALESCE(NULLIF(trim(r.mapped_data->>'EPRELID'), ''), '') <> ''
					)`
)

func normalizeCoverageFilter(raw string) string {
	c := strings.ToLower(strings.TrimSpace(raw))
	c = strings.ReplaceAll(c, "-", "_")
	switch c {
	case "", "all", "any":
		return ""
	case "complete", "full", "ok":
		return "complete"
	case "incomplete", "partial":
		return "incomplete"
	case "missing_name", "name":
		return "missing_name"
	case "missing_description", "description":
		return "missing_description"
	case "missing_attributes", "attributes", "attrs":
		return "missing_attributes"
	case "missing_category", "category":
		return "missing_category"
	default:
		return ""
	}
}

func normalizeEprelFilter(raw string) string {
	c := strings.ToLower(strings.TrimSpace(raw))
	c = strings.ReplaceAll(c, "-", "_")
	switch c {
	case "", "all", "any":
		return ""
	case "has_eprel", "eprel", "with_eprel", "yes", "true", "1":
		return "has_eprel"
	case "no_eprel", "without_eprel", "missing_eprel", "none", "no", "false", "0":
		return "no_eprel"
	default:
		return ""
	}
}

func normalizeSyncChangeFilter(raw string) string {
	c := strings.ToLower(strings.TrimSpace(raw))
	c = strings.ReplaceAll(c, "-", "_")
	switch c {
	case "", "all":
		return ""
	case "any", "changed", "has_change", "has_changes":
		return "any"
	case "price", "price_changed":
		return "price"
	case "stock", "stock_changed", "qty", "quantity":
		return "stock"
	case "availability", "availability_changed", "stock_status":
		return "availability"
	case "title", "name", "title_changed":
		return "title"
	case "other", "other_changed":
		return "other"
	case "new", "inserted":
		return "new"
	default:
		return ""
	}
}

func appendSyncChangeFilter(alias, syncChange string, where []string) []string {
	col := alias + `.mapped_data->'_sync_changes'`
	switch syncChange {
	case "any":
		return append(where, `jsonb_typeof(`+col+`) = 'array' AND jsonb_array_length(`+col+`) > 0`)
	case "price", "stock", "availability", "title", "other", "new":
		return append(where, col+` ? '`+syncChange+`'`)
	default:
		return where
	}
}

func appendProcessedCoverageFilter(coverage string, where []string) []string {
	switch coverage {
	case "complete":
		return append(where, processedHasNameSQL+" AND "+processedHasDescriptionSQL+" AND "+processedHasCategorySQL+" AND "+processedHasAttributesSQL)
	case "incomplete":
		return append(where, "NOT ("+processedHasNameSQL+" AND "+processedHasDescriptionSQL+" AND "+processedHasCategorySQL+" AND "+processedHasAttributesSQL+")")
	case "missing_name":
		return append(where, "NOT "+processedHasNameSQL)
	case "missing_description":
		return append(where, "NOT "+processedHasDescriptionSQL)
	case "missing_attributes":
		return append(where, "NOT "+processedHasAttributesSQL)
	case "missing_category":
		return append(where, "NOT "+processedHasCategorySQL)
	default:
		return where
	}
}

func appendProcessedEprelFilter(eprel string, where []string) []string {
	switch eprel {
	case "has_eprel":
		return append(where, processedHasEprelSQL)
	case "no_eprel":
		return append(where, "NOT "+processedHasEprelSQL)
	default:
		return where
	}
}

func processedListNeedsRawJoin(f ListFilter) bool {
	return f.Query != "" || f.Coverage != "" || f.Eprel != "" || f.SyncChange != ""
}

func appendRawProductFilters(f ListFilter, args []any, where []string) ([]any, []string) {
	// Search keyed JSON paths + gtin/feed only. Avoid CAST(jsonb AS text) ILIKE:
	// it forces full-document scans and cannot use btree/trigram expression indexes usefully.
	// Defer pg_trgm/GIN until leading-wildcard ILIKE is measured hot after this shape.
	if f.Query != "" {
		args = append(args, "%"+f.Query+"%")
		n := len(args)
		where = append(where, fmt.Sprintf(`(
			rp.gtin ILIKE $%d
			OR COALESCE(rp.mapped_data->>'name', '') ILIKE $%d
			OR COALESCE(rp.mapped_data->>'title', '') ILIKE $%d
			OR COALESCE(f.name, '') ILIKE $%d
		)`, n, n, n, n))
	}
	if f.Status != "" {
		args = append(args, f.Status)
		where = append(where, fmt.Sprintf("rp.processing_status = $%d", len(args)))
	}
	if feedID, err := uuid.Parse(strings.TrimSpace(f.FeedID)); err == nil {
		args = append(args, feedID)
		where = append(where, fmt.Sprintf("rp.feed_id = $%d", len(args)))
	}
	where = appendSyncChangeFilter("rp", f.SyncChange, where)
	return args, where
}

func (s *Service) ListRawProducts(ctx context.Context, companyID uuid.UUID, f ListFilter) ([]map[string]any, int64, error) {
	f, err := normalizeProductListFilter(f)
	if err != nil {
		return nil, 0, err
	}
	args := []any{companyID}
	where := []string{"rp.company_id = $1"}
	args, where = appendRawProductFilters(f, args, where)
	countArgs := append([]any{}, args...)
	countSQL := strings.Join(where, " AND ")
	cur, useCursor, missing, err := s.resolveRawCursor(ctx, companyID, f)
	if err != nil {
		return nil, 0, err
	}
	if missing {
		where = append(where, "FALSE")
	} else if useCursor {
		args, where, err = appendRawKeyset(f, cur, args, where)
		if err != nil {
			return nil, 0, ClientMsg("invalid cursor")
		}
	}
	wSQL := strings.Join(where, " AND ")
	listFromSQL := `
		FROM raw_products rp
		LEFT JOIN input_feeds f ON f.id = rp.feed_id`
	countFromSQL := rawProductsCountFromSQL(f.Query != "")
	orderBy := rawProductsOrderBy(f)
	listArgs := append(append([]any{}, args...), f.Limit, f.Offset)
	lim := len(listArgs) - 1
	off := len(listArgs)
	return parallelCountAndList(ctx,
		f.Limit, f.Offset,
		func(ctx context.Context) (int64, error) {
			var total int64
			err := s.Pool.QueryRow(ctx, `SELECT count(*) `+countFromSQL+` WHERE `+countSQL, countArgs...).Scan(&total)
			return total, err
		},
		func(ctx context.Context) ([]map[string]any, error) {
			rows, err := s.Pool.Query(ctx, fmt.Sprintf(`
				SELECT rp.id, rp.gtin, rp.feed_id, rp.is_processed, rp.processing_status,
					COALESCE(NULLIF(rp.mapped_data->>'name', ''), NULLIF(rp.mapped_data->>'title', ''), '') AS name,
					NULLIF(BTRIM(rp.mapped_data->>'category'), '') AS category,
					cat.name AS category_name,
					COALESCE(cat.unique_id, NULLIF(BTRIM(rp.mapped_data->>'category'), '')) AS category_unique_id,
					f.name AS feed_name,
					rp.mapped_data->'_sync_changes' AS sync_changes,
					(COALESCE(NULLIF(trim(rp.mapped_data->>'name'), ''), NULLIF(trim(rp.mapped_data->>'title'), ''), '') <> '') AS has_name,
					(COALESCE(NULLIF(trim(rp.mapped_data->>'description'), ''), '') <> '') AS has_description,
					(COALESCE(NULLIF(trim(rp.mapped_data->>'category'), ''), '') <> '' AND lower(trim(rp.mapped_data->>'category')) <> 'none') AS has_category,
					`+strings.ReplaceAll(processedHasFeedAttributesSQL, "r.mapped_data", "rp.mapped_data")+` AS has_attributes,
					rp.created_at, rp.updated_at
				%s%s WHERE %s
				ORDER BY %s
				LIMIT $%d OFFSET $%d`, listFromSQL, rawCategoryResolveJoin, wSQL, orderBy, lim, off), listArgs...)
			if err != nil {
				return nil, err
			}
			defer rows.Close()
			return scanMaps(rows, []string{
				"id", "gtin", "feed_id", "is_processed", "processing_status",
				"name", "category", "category_name", "category_unique_id",
				"feed_name", "sync_changes",
				"has_name", "has_description", "has_category", "has_attributes",
				"created_at", "updated_at",
			})
		},
	)
}

// ListRawProductIDsByFeed returns up to limit raw product UUIDs for a company-scoped feed.
func (s *Service) ListRawProductIDsByFeed(ctx context.Context, companyID, feedID uuid.UUID, limit int) ([]uuid.UUID, error) {
	if limit <= 0 {
		limit = 10
	}
	if limit > 100 {
		limit = 100
	}
	rows, err := s.Pool.Query(ctx, `
		SELECT id FROM raw_products
		WHERE company_id = $1 AND feed_id = $2
		ORDER BY created_at DESC
		LIMIT $3`, companyID, feedID, limit)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	ids := make([]uuid.UUID, 0, limit)
	for rows.Next() {
		var id uuid.UUID
		if err := rows.Scan(&id); err != nil {
			return nil, err
		}
		ids = append(ids, id)
	}
	return ids, rows.Err()
}

func appendProcessedProductFilters(f ProductFilter, args []any, where []string) ([]any, []string) {
	if f.Query != "" {
		args = append(args, "%"+f.Query+"%")
		n := len(args)
		where = append(where, fmt.Sprintf(
			`(p.name ILIKE $%d OR COALESCE(p.processed_name, '') ILIKE $%d OR p.product_id ILIKE $%d OR p.category ILIKE $%d OR COALESCE(r.gtin, '') ILIKE $%d)`,
			n, n, n, n, n))
	}
	if f.Status != "" {
		// needs_review includes legacy pipeline status "processed" (pre-P0-8).
		if f.Status == "needs_review" {
			where = append(where, "p.status IN ('needs_review', 'processed')")
		} else {
			args = append(args, f.Status)
			where = append(where, fmt.Sprintf("p.status = $%d", len(args)))
		}
	}
	if f.Category != "" {
		args = append(args, f.Category)
		n := len(args)
		// Match stored unique_id, UUID id, or display name for the selected category.
		where = append(where, fmt.Sprintf(`(
			p.category = $%d
			OR EXISTS (
				SELECT 1 FROM categories c
				WHERE c.company_id = p.company_id
					AND (
					c.unique_id = $%d
					OR c.id::text = $%d
					OR lower(c.name) = lower($%d)
					)
					AND (
					p.category = c.unique_id
					OR p.category = c.id::text
					OR lower(p.category) = lower(c.name)
					)
			)
		)`, n, n, n, n))
	}
	if feedID, err := uuid.Parse(f.FeedID); err == nil {
		args = append(args, feedID)
		where = append(where, fmt.Sprintf("p.feed_id = $%d", len(args)))
	}
	where = appendProcessedCoverageFilter(f.Coverage, where)
	where = appendProcessedEprelFilter(f.Eprel, where)
	where = appendSyncChangeFilter("r", f.SyncChange, where)
	return args, where
}

// ListProcessedProducts returns a lean page without heavy JSONB columns
// (attributes, descriptions, mapped_data). Prefer this for UI tables;
// use ListProcessedProductsDetailed when quality scoring or full attrs are needed.
func (s *Service) ListProcessedProducts(ctx context.Context, companyID uuid.UUID, f ProductFilter) ([]map[string]any, int64, error) {
	f, err := normalizeProductFilter(f)
	if err != nil {
		return nil, 0, err
	}
	args := []any{companyID}
	where := []string{"p.company_id = $1"}
	args, where = appendProcessedProductFilters(f, args, where)
	countArgs := append([]any{}, args...)
	countSQL := strings.Join(where, " AND ")
	cur, useCursor, missing, err := s.resolveProcessedCursor(ctx, companyID, f)
	if err != nil {
		return nil, 0, err
	}
	if missing {
		where = append(where, "FALSE")
	} else if useCursor {
		args, where, err = appendProcessedKeyset(f, cur, args, where)
		if err != nil {
			return nil, 0, ClientMsg("invalid cursor")
		}
	}
	wSQL := strings.Join(where, " AND ")
	orderBy := processedProductsOrderBy(f)
	listArgs := append(append([]any{}, args...), f.Limit, f.Offset)
	lim := len(listArgs) - 1
	off := len(listArgs)
	return parallelCountAndList(ctx,
		f.Limit, f.Offset,
		func(ctx context.Context) (int64, error) {
			var total int64
			err := s.Pool.QueryRow(ctx, `
				SELECT count(*) `+processedProductsCountFromSQL(processedListNeedsRawJoin(f))+`
				WHERE `+countSQL, countArgs...).Scan(&total)
			return total, err
		},
		func(ctx context.Context) ([]map[string]any, error) {
			rows, err := s.Pool.Query(ctx, fmt.Sprintf(`
				SELECT p.id, p.product_id,
					`+processedPreferredNameSQL+` AS name,
					COALESCE(NULLIF(p.processed_name, ''), '') AS processed_name,
					p.category,
					cat.name AS category_name,
					COALESCE(cat.unique_id, NULLIF(BTRIM(p.category), '')) AS category_unique_id,
					p.status, p.raw_product_id, COALESCE(p.feed_id, r.feed_id) AS feed_id, r.gtin,
					f.name AS feed_name,
					f.last_synced_at AS feed_last_synced_at,
					r.updated_at AS raw_updated_at,
					(`+processedPreferredNameSQL+` <> '') AS has_name,
					(COALESCE(NULLIF(p.processed_name, ''), '') <> '') AS has_processed_name,
					(`+processedPreferredDescriptionSQL+` <> '') AS has_description,
					(COALESCE(NULLIF(p.processed_description, ''), '') <> '') AS has_processed_description,
					(COALESCE(NULLIF(p.category, ''), '') <> '' AND lower(p.category) <> 'none') AS has_category,
					`+processedHasAttributesSQL+` AS has_attributes,
					`+processedHasProcessedAttributesSQL+` AS has_processed_attributes,
					`+processedHasEprelSQL+` AS has_eprel,
					p.created_at, p.updated_at
				FROM processed_products p
				LEFT JOIN raw_products r ON r.id = p.raw_product_id
				LEFT JOIN input_feeds f ON f.id = COALESCE(p.feed_id, r.feed_id)`+processedCategoryResolveJoin+`
				WHERE %s
				ORDER BY %s LIMIT $%d OFFSET $%d`, wSQL, orderBy, lim, off), listArgs...)
			if err != nil {
				return nil, err
			}
			defer rows.Close()
			items, err := scanMaps(rows, []string{
				"id", "product_id", "name", "processed_name", "category", "category_name", "category_unique_id",
				"status", "raw_product_id", "feed_id", "gtin",
				"feed_name", "feed_last_synced_at", "raw_updated_at",
				"has_name", "has_processed_name", "has_description", "has_processed_description", "has_category", "has_attributes", "has_processed_attributes",
				"has_eprel",
				"created_at", "updated_at",
			})
			if err != nil {
				return nil, err
			}
			for _, item := range items {
				if name, ok := item["name"].(string); ok && strings.TrimSpace(name) != "" {
					item["title"] = name
				}
			}
			return items, nil
		},
	)
}

// ListProcessedProductsDetailed includes fields needed for quality scoring.
func (s *Service) ListProcessedProductsDetailed(ctx context.Context, companyID uuid.UUID, f ProductFilter) ([]map[string]any, int64, error) {
	f, err := normalizeProductFilter(f)
	if err != nil {
		return nil, 0, err
	}
	args := []any{companyID}
	where := []string{"p.company_id = $1"}
	args, where = appendProcessedProductFilters(f, args, where)
	countArgs := append([]any{}, args...)
	countSQL := strings.Join(where, " AND ")
	cur, useCursor, missing, err := s.resolveProcessedCursor(ctx, companyID, f)
	if err != nil {
		return nil, 0, err
	}
	if missing {
		where = append(where, "FALSE")
	} else if useCursor {
		args, where, err = appendProcessedKeyset(f, cur, args, where)
		if err != nil {
			return nil, 0, ClientMsg("invalid cursor")
		}
	}
	wSQL := strings.Join(where, " AND ")
	orderBy := processedProductsOrderBy(f)
	listArgs := append(append([]any{}, args...), f.Limit, f.Offset)
	lim := len(listArgs) - 1
	off := len(listArgs)
	return parallelCountAndList(ctx,
		f.Limit, f.Offset,
		func(ctx context.Context) (int64, error) {
			var total int64
			err := s.Pool.QueryRow(ctx, `
				SELECT count(*) `+processedProductsCountFromSQL(processedListNeedsRawJoin(f))+`
				WHERE `+countSQL, countArgs...).Scan(&total)
			return total, err
		},
		func(ctx context.Context) ([]map[string]any, error) {
			rows, err := s.Pool.Query(ctx, fmt.Sprintf(`
				SELECT p.id, p.product_id,
					`+processedPreferredNameSQL+` AS name,
					p.category,
					cat.name AS category_name,
					COALESCE(cat.unique_id, NULLIF(BTRIM(p.category), '')) AS category_unique_id,
					p.status, p.raw_product_id, p.feed_id, r.gtin,
					`+processedPreferredDescriptionSQL+` AS description,
					p.processed_name, p.processed_description,
					COALESCE(p.meta_title, ''), COALESCE(p.meta_description, ''),
					p.attributes, p.processed_attributes, r.mapped_data,
					p.created_at, p.updated_at
				FROM processed_products p
				LEFT JOIN raw_products r ON r.id = p.raw_product_id`+processedCategoryResolveJoin+`
				WHERE %s
				ORDER BY %s LIMIT $%d OFFSET $%d`, wSQL, orderBy, lim, off), listArgs...)
			if err != nil {
				return nil, err
			}
			defer rows.Close()
			items, err := scanMaps(rows, []string{
				"id", "product_id", "name", "category", "category_name", "category_unique_id",
				"status", "raw_product_id", "feed_id", "gtin",
				"description", "processed_name", "processed_description",
				"meta_title", "meta_description",
				"attributes", "processed_attributes", "mapped_data",
				"created_at", "updated_at",
			})
			if err != nil {
				return nil, err
			}
			for _, item := range items {
				alignProductFieldsWithV1(item)
			}
			return items, nil
		},
	)
}

func (s *Service) GetProcessedProduct(ctx context.Context, companyID, id uuid.UUID) (map[string]any, error) {
	row := s.Pool.QueryRow(ctx, `
		SELECT p.id, p.product_id,
			`+processedPreferredNameSQL+` AS name,
			p.category,
			cat.name AS category_name,
			COALESCE(cat.unique_id, NULLIF(BTRIM(p.category), '')) AS category_unique_id,
			`+processedPreferredDescriptionSQL+` AS description,
			p.processed_name, p.processed_description,
			p.status, p.attributes, p.processed_attributes, r.gtin, r.mapped_data,
			COALESCE(p.feed_id, r.feed_id) AS feed_id,
			f.name AS feed_name,
			f.last_synced_at AS feed_last_synced_at,
			r.updated_at AS raw_updated_at,
			(COALESCE(NULLIF(p.processed_name, ''), '') <> '') AS has_processed_name,
			(COALESCE(NULLIF(p.processed_description, ''), '') <> '') AS has_processed_description,
			`+processedHasAttributesSQL+` AS has_attributes,
			`+processedHasProcessedAttributesSQL+` AS has_processed_attributes,
			`+processedHasEprelSQL+` AS has_eprel,
			COALESCE(p.localized_content, '{}'::jsonb) AS localized_content,
			p.created_at, p.updated_at
		FROM processed_products p
		LEFT JOIN raw_products r ON r.id = p.raw_product_id
		LEFT JOIN input_feeds f ON f.id = COALESCE(p.feed_id, r.feed_id)`+processedCategoryResolveJoin+`
		WHERE p.id = $1 AND p.company_id = $2`, id, companyID)
	item, err := scanMap(row, []string{
		"id", "product_id", "name", "category", "category_name", "category_unique_id",
		"description", "processed_name", "processed_description",
		"status", "attributes", "processed_attributes", "gtin", "mapped_data",
		"feed_id", "feed_name", "feed_last_synced_at", "raw_updated_at",
		"has_processed_name", "has_processed_description", "has_attributes", "has_processed_attributes",
		"has_eprel",
		"localized_content",
		"created_at", "updated_at",
	})
	if err != nil {
		return nil, err
	}
	linkFeedSpecificationsIntoProduct(item)
	alignProductFieldsWithV1(item)
	primary := company.LoadLanguage(ctx, s.Pool, companyID)
	item["content_language"] = primary
	item["content_languages"] = company.LoadContentLanguages(ctx, s.Pool, companyID)
	if loc, err := company.DecodeLocalizedContent(item["localized_content"]); err == nil {
		item["localized_content"] = loc
	}
	return item, nil
}

// GetRawProduct returns a raw inventory row with feed-origin mapped_data so the
// product panel can show original description, category, and attributes when
// processed_products is empty (A1 demo seed keeps processed=0).
func (s *Service) GetRawProduct(ctx context.Context, companyID, id uuid.UUID) (map[string]any, error) {
	row := s.Pool.QueryRow(ctx, `
		SELECT rp.id,
			COALESCE(NULLIF(rp.gtin, ''), '') AS product_id,
			COALESCE(NULLIF(rp.mapped_data->>'name', ''), NULLIF(rp.mapped_data->>'title', ''), '') AS name,
			NULLIF(BTRIM(rp.mapped_data->>'category'), '') AS category,
			cat.name AS category_name,
			COALESCE(cat.unique_id, NULLIF(BTRIM(rp.mapped_data->>'category'), '')) AS category_unique_id,
			COALESCE(NULLIF(rp.mapped_data->>'description', ''), '') AS description,
			''::text AS processed_name,
			''::text AS processed_description,
			COALESCE(NULLIF(rp.processing_status, ''), 'unprocessed') AS status,
			'{}'::jsonb AS attributes,
			'{}'::jsonb AS processed_attributes,
			rp.gtin,
			rp.mapped_data,
			rp.feed_id,
			f.name AS feed_name,
			f.last_synced_at AS feed_last_synced_at,
			rp.updated_at AS raw_updated_at,
			false AS has_processed_name,
			false AS has_processed_description,
			`+strings.ReplaceAll(processedHasFeedAttributesSQL, "r.mapped_data", "rp.mapped_data")+` AS has_attributes,
			false AS has_processed_attributes,
			`+strings.ReplaceAll(processedHasEprelSQL, "r.mapped_data", "rp.mapped_data")+` AS has_eprel,
			'{}'::jsonb AS localized_content,
			rp.created_at, rp.updated_at,
			(COALESCE(NULLIF(trim(rp.mapped_data->>'name'), ''), NULLIF(trim(rp.mapped_data->>'title'), ''), '') <> '') AS has_name,
			(COALESCE(NULLIF(trim(rp.mapped_data->>'description'), ''), '') <> '') AS has_description,
			(COALESCE(NULLIF(trim(rp.mapped_data->>'category'), ''), '') <> '' AND lower(trim(rp.mapped_data->>'category')) <> 'none') AS has_category,
			rp.is_processed, rp.processing_status
		FROM raw_products rp
		LEFT JOIN input_feeds f ON f.id = rp.feed_id`+rawCategoryResolveJoin+`
		WHERE rp.id = $1 AND rp.company_id = $2`, id, companyID)
	item, err := scanMap(row, []string{
		"id", "product_id", "name", "category", "category_name", "category_unique_id",
		"description", "processed_name", "processed_description",
		"status", "attributes", "processed_attributes", "gtin", "mapped_data",
		"feed_id", "feed_name", "feed_last_synced_at", "raw_updated_at",
		"has_processed_name", "has_processed_description", "has_attributes", "has_processed_attributes",
		"has_eprel",
		"localized_content",
		"created_at", "updated_at",
		"has_name", "has_description", "has_category",
		"is_processed", "processing_status",
	})
	if err != nil {
		return nil, err
	}
	linkFeedSpecificationsIntoProduct(item)
	alignProductFieldsWithV1(item)
	primary := company.LoadLanguage(ctx, s.Pool, companyID)
	item["content_language"] = primary
	item["content_languages"] = company.LoadContentLanguages(ctx, s.Pool, companyID)
	if loc, err := company.DecodeLocalizedContent(item["localized_content"]); err == nil {
		item["localized_content"] = loc
	}
	return item, nil
}

func (s *Service) UpdateProcessedProduct(ctx context.Context, companyID, id uuid.UUID, body map[string]any) (map[string]any, error) {
	name, _ := body["name"].(string)
	desc, _ := body["description"].(string)
	status, _ := body["status"].(string)
	category, _ := body["category"].(string)
	productID, _ := body["product_id"].(string)
	processedName, _ := body["processed_name"].(string)
	processedDesc, _ := body["processed_description"].(string)
	langRaw, _ := body["language"].(string)
	var attrsJSON *string
	if v, ok := body["attributes"]; ok && v != nil {
		b, err := json.Marshal(v)
		if err != nil {
			return nil, ClientMsg("invalid attributes")
		}
		s := string(b)
		attrsJSON = &s
	}

	primary := company.LoadLanguage(ctx, s.Pool, companyID)
	lang := primary
	if strings.TrimSpace(langRaw) != "" {
		parsed, err := company.ParseLanguage(langRaw, false)
		if err != nil {
			return nil, ClientMsg("unsupported language")
		}
		lang = parsed
	}

	// Load existing localized_content and merge this language's fields.
	var existingRaw []byte
	_ = s.Pool.QueryRow(ctx, `
		SELECT COALESCE(localized_content, '{}'::jsonb)
		FROM processed_products WHERE id = $1 AND company_id = $2`, id, companyID).Scan(&existingRaw)
	localized, _ := company.DecodeLocalizedContent(existingRaw)
	fields := company.FieldsForLanguage(localized, lang)
	if _, ok := body["processed_name"]; ok {
		fields.ProcessedName = processedName
	}
	if _, ok := body["processed_description"]; ok {
		fields.ProcessedDescription = processedDesc
	}
	if mt, ok := body["meta_title"].(string); ok {
		fields.MetaTitle = mt
	}
	if md, ok := body["meta_description"].(string); ok {
		fields.MetaDescription = md
	}
	localized = company.SetFieldsForLanguage(localized, lang, fields)
	locJSON, err := company.EncodeLocalizedContent(localized)
	if err != nil {
		return nil, err
	}

	// Denormalized columns always reflect primary language.
	primaryFields := company.FieldsForLanguage(localized, primary)
	denormName := primaryFields.ProcessedName
	denormDesc := primaryFields.ProcessedDescription
	if lang == primary {
		if _, ok := body["processed_name"]; ok {
			denormName = processedName
		}
		if _, ok := body["processed_description"]; ok {
			denormDesc = processedDesc
		}
	}

	ct, err := s.Pool.Exec(ctx, `
		UPDATE processed_products SET
			name = CASE WHEN $3 <> '' THEN $3 ELSE name END,
			description = CASE WHEN $4 <> '' THEN $4 ELSE description END,
			status = CASE WHEN $5 <> '' THEN $5 ELSE status END,
			category = CASE WHEN $14::boolean THEN $6 ELSE category END,
			product_id = CASE WHEN $7 <> '' THEN $7 ELSE product_id END,
			processed_name = CASE WHEN $11::boolean THEN $8 ELSE processed_name END,
			processed_description = CASE WHEN $12::boolean THEN $9 ELSE processed_description END,
			attributes = CASE WHEN $10::jsonb IS NOT NULL THEN $10::jsonb ELSE attributes END,
			localized_content = $13::jsonb,
			updated_at = now()
		WHERE id = $1 AND company_id = $2`,
		id, companyID, name, desc, status, category, productID, denormName, denormDesc, attrsJSON,
		lang == primary && hasKey(body, "processed_name"),
		lang == primary && hasKey(body, "processed_description"),
		string(locJSON),
		hasKey(body, "category"))
	if err != nil {
		return nil, err
	}
	if ct.RowsAffected() == 0 {
		return nil, ErrNotFound
	}
	return s.GetProcessedProduct(ctx, companyID, id)
}

func hasKey(m map[string]any, key string) bool {
	_, ok := m[key]
	return ok
}

func scanMaps(rows pgx.Rows, cols []string) ([]map[string]any, error) {
	out := make([]map[string]any, 0)
	for rows.Next() {
		vals := make([]any, len(cols))
		ptrs := make([]any, len(cols))
		for i := range vals {
			ptrs[i] = &vals[i]
		}
		if err := rows.Scan(ptrs...); err != nil {
			return nil, err
		}
		m := make(map[string]any, len(cols))
		for i, c := range cols {
			m[c] = normalize(vals[i])
		}
		out = append(out, m)
	}
	return out, rows.Err()
}

func scanMap(row pgx.Row, cols []string) (map[string]any, error) {
	vals := make([]any, len(cols))
	ptrs := make([]any, len(cols))
	for i := range vals {
		ptrs[i] = &vals[i]
	}
	if err := row.Scan(ptrs...); err != nil {
		return nil, err
	}
	m := make(map[string]any, len(cols))
	for i, c := range cols {
		m[c] = normalize(vals[i])
	}
	return m, nil
}

func normalize(v any) any {
	switch t := v.(type) {
	case []byte:
		var j any
		if json.Unmarshal(t, &j) == nil {
			return j
		}
		return string(t)
	case [16]byte:
		return uuid.UUID(t).String()
	default:
		return v
	}
}

var _ = fmt.Sprintf