repository.go

package items

import (
	"context"
	"database/sql"
	"fmt"
	"regexp"
	"sort"
	"strings"

	"github.com/autowp/goautowp/pictures"
	"github.com/autowp/goautowp/util"
	"github.com/doug-martin/goqu/v9"
	"github.com/doug-martin/goqu/v9/exp"
	"golang.org/x/text/collate"
	"golang.org/x/text/language"
)

const (
	TopBrandsCount      = 150
	NewDays             = 7
	TopPersonsCount     = 5
	TopFactoriesCount   = 8
	TopCategoriesCount  = 15
	TopTwinsBrandsCount = 20
)

type TreeItem struct {
	ID       int64
	Name     string
	Childs   []TreeItem
	ItemType ItemType
}

var languagePriority = map[string][]string{
	"xx":    {"en", "it", "fr", "de", "es", "pt", "ru", "be", "uk", "zh", "jp", "xx"},
	"en":    {"en", "it", "fr", "de", "es", "pt", "ru", "be", "uk", "zh", "jp", "xx"},
	"fr":    {"fr", "en", "it", "de", "es", "pt", "ru", "be", "uk", "zh", "jp", "xx"},
	"pt-br": {"pt", "en", "it", "fr", "de", "es", "ru", "be", "uk", "zh", "jp", "xx"},
	"ru":    {"ru", "en", "it", "fr", "de", "es", "pt", "be", "uk", "zh", "jp", "xx"},
	"be":    {"be", "ru", "uk", "en", "it", "fr", "de", "es", "pt", "zh", "jp", "xx"},
	"uk":    {"uk", "ru", "en", "it", "fr", "de", "es", "pt", "be", "zh", "jp", "xx"},
	"zh":    {"zh", "en", "it", "fr", "de", "es", "pt", "ru", "be", "uk", "jp", "xx"},
	"es":    {"es", "en", "it", "fr", "de", "pt", "ru", "be", "uk", "zh", "jp", "xx"},
	"it":    {"it", "en", "fr", "de", "es", "pt", "ru", "be", "uk", "zh", "jp", "xx"},
}

type ItemType int

const (
	VEHICLE   ItemType = 1
	ENGINE    ItemType = 2
	CATEGORY  ItemType = 3
	TWINS     ItemType = 4
	BRAND     ItemType = 5
	FACTORY   ItemType = 6
	MUSEUM    ItemType = 7
	PERSON    ItemType = 8
	COPYRIGHT ItemType = 9
)

const (
	ItemParentTypeDefault = 0
	ItemParentTypeTuning  = 1
	ItemParentTypeSport   = 2
	ItemParentTypeDesign  = 3
)

// Repository Main Object.
type Repository struct {
	db *goqu.Database
}

type Item struct {
	ID                  int64
	Catname             string
	Name                string
	ItemsCount          int32
	NewItemsCount       int32
	ChildItemsCount     int32
	NewChildItemsCount  int32
	DescendantsCount    int32
	NewDescendantsCount int32
}

// NewRepository constructor.
func NewRepository(
	db *goqu.Database,
) *Repository {
	return &Repository{
		db: db,
	}
}

type PicturesOptions struct {
	Status      pictures.Status
	ItemPicture *ItemPicturesOptions
}

type ItemPicturesOptions struct {
	TypeID        pictures.ItemPictureType
	Pictures      *PicturesOptions
	PerspectiveID int32
}

type ListPreviewPicturesPictureFields struct {
	NameText bool
}

type ListPreviewPicturesFields struct {
	Route   bool
	Picture ListPreviewPicturesPictureFields
}

type ListFields struct {
	Name                bool
	NameHTML            bool
	NameDefault         bool
	Description         bool
	HasText             bool
	PreviewPictures     ListPreviewPicturesFields
	TotalPictures       bool
	ItemsCount          bool
	NewItemsCount       bool
	ChildItemsCount     bool
	NewChildItemsCount  bool
	DescendantsCount    bool
	NewDescendantsCount bool
}

type ListOptions struct {
	Language           string
	Fields             ListFields
	TypeID             []ItemType
	DescendantPictures *ItemPicturesOptions
	PreviewPictures    *ItemPicturesOptions
	Limit              uint64
	OrderBy            []exp.OrderedExpression
	SortByName         bool
	ChildItems         *ListOptions
	DescendantItems    *ListOptions
	ParentItems        *ListOptions
	AncestorItems      *ListOptions
	NoParents          bool
}

func applyPicture(alias string, sqSelect *goqu.SelectDataset, options *PicturesOptions) *goqu.SelectDataset {
	joinPicture := false

	pAlias := alias + "_p"

	if options.Status != "" {
		joinPicture = true
		sqSelect = sqSelect.Where(goqu.Ex{pAlias + ".status": options.Status})
	}

	if options.ItemPicture != nil {
		joinPicture = true
		sqSelect = applyItemPicture(pAlias, sqSelect, options.ItemPicture)
	}

	if joinPicture {
		sqSelect = sqSelect.Join(goqu.I("pictures").As(pAlias), goqu.On(goqu.I(alias+".picture_id").Eq(goqu.I(pAlias+".id"))))
	}

	return sqSelect
}

func applyItemPicture(alias string, sqSelect *goqu.SelectDataset, options *ItemPicturesOptions) *goqu.SelectDataset {
	piAlias := alias + "_pi"

	sqSelect = sqSelect.Join(
		goqu.I("picture_item").As(piAlias),
		goqu.On(goqu.I(alias+".id").Eq(goqu.I(piAlias+".item_id"))),
	)

	if options.TypeID != 0 {
		sqSelect = sqSelect.Where(goqu.Ex{piAlias + ".type": options.TypeID})
	}

	if options.PerspectiveID != 0 {
		sqSelect = sqSelect.Where(goqu.Ex{piAlias + ".perspective_id": options.PerspectiveID})
	}

	if options.Pictures != nil {
		sqSelect = applyPicture(piAlias, sqSelect, options.Pictures)
	}

	return sqSelect
}

func applyItem(
	alias string,
	sqSelect *goqu.SelectDataset,
	fields bool,
	options *ListOptions,
) (*goqu.SelectDataset, error) {
	var err error

	if options.TypeID != nil && len(options.TypeID) > 0 {
		sqSelect = sqSelect.Where(goqu.Ex{alias + ".item_type_id": options.TypeID})
	}

	if options.DescendantPictures != nil {
		sqSelect = applyItemPicture(alias, sqSelect, options.DescendantPictures)
	}

	ipcAlias := alias + "_ipc"

	if options.ChildItems != nil {
		iAlias := alias + "_ic"
		sqSelect = sqSelect.
			Join(goqu.T("item_parent").As(ipcAlias), goqu.On(goqu.I(alias+".id").Eq(goqu.I(ipcAlias+".parent_id")))).
			Join(goqu.T("item").As(iAlias), goqu.On(goqu.I(ipcAlias+".item_id").Eq(goqu.I(iAlias+".id"))))
		sqSelect, err = applyItem(iAlias, sqSelect, fields, options.ChildItems)

		if err != nil {
			return sqSelect, err
		}
	}

	if options.ParentItems != nil {
		iAlias := alias + "_ip"
		ippAlias := alias + "_ipc"
		sqSelect = sqSelect.
			Join(goqu.T("item_parent").As(ippAlias), goqu.On(goqu.I(alias+".id").Eq(goqu.I(ippAlias+".item_id")))).
			Join(goqu.T("item").As(iAlias), goqu.On(goqu.I(ippAlias+".parent_id").Eq(goqu.I(iAlias+".id"))))
		sqSelect, err = applyItem(iAlias, sqSelect, fields, options.ParentItems)

		if err != nil {
			return sqSelect, err
		}
	}

	if options.DescendantItems != nil {
		ipcdAlias := alias + "_ipcd"
		iAlias := alias + "_id"
		sqSelect = sqSelect.
			Join(goqu.T("item_parent_cache").As(ipcdAlias), goqu.On(goqu.I(alias+".id").Eq(goqu.I(ipcdAlias+".parent_id")))).
			Join(goqu.T("item").As(iAlias), goqu.On(goqu.I(ipcdAlias+".item_id").Eq(goqu.I(iAlias+".id"))))
		sqSelect, err = applyItem(iAlias, sqSelect, fields, options.DescendantItems)

		if err != nil {
			return sqSelect, err
		}
	}

	if options.AncestorItems != nil {
		ipcaAlias := alias + "_ipca"
		iAlias := alias + "_ia"
		sqSelect = sqSelect.
			Join(goqu.T("item_parent_cache").As(ipcaAlias), goqu.On(goqu.I(alias+".id").Eq(goqu.I(ipcaAlias+".item_id")))).
			Join(goqu.T("item").As(iAlias), goqu.On(goqu.I(ipcaAlias+".parent_id").Eq(goqu.I(iAlias+".id"))))
		sqSelect, err = applyItem(iAlias, sqSelect, fields, options.AncestorItems)

		if err != nil {
			return sqSelect, err
		}
	}

	if options.NoParents {
		ipnpAlias := alias + "_ipnp"
		sqSelect = sqSelect.
			LeftJoin(goqu.T("item_parent").As(ipnpAlias), goqu.On(goqu.I(alias+".id").Eq(goqu.I(ipnpAlias+".item_id")))).
			Where(goqu.I(ipnpAlias + ".parent_id").IsNull())
	}

	columns := make([]interface{}, 0)

	if fields {
		if options.Fields.ChildItemsCount {
			columns = append(columns, goqu.L("count(distinct "+ipcAlias+".item_id)").As("child_items_count"))
		}

		if options.Fields.NewChildItemsCount {
			columns = append(
				columns,
				goqu.L("count(distinct IF("+ipcAlias+".timestamp > DATE_SUB(NOW(), INTERVAL ? DAY), "+
					ipcAlias+".item_id, NULL))", NewDays).
					As("new_child_items_count"))
		}

		if options.Fields.Name {
			langPriority, ok := languagePriority[options.Language]
			if !ok {
				return sqSelect, fmt.Errorf("language `%s` not found", options.Language)
			}

			s := make([]interface{}, len(langPriority))
			for i, v := range langPriority {
				s[i] = v
			}

			columns = append(columns, goqu.L(`
				IFNULL(
					(SELECT name
					FROM item_language
					WHERE item_id = `+alias+`.id AND length(name) > 0
					ORDER BY FIELD(language, `+strings.Repeat(",?", len(s))[1:]+`)
					LIMIT 1),
					`+alias+`.name
				)
			`, s...).As("name"))
		}

		if options.Fields.ItemsCount {
			columns = append(columns, goqu.L("count(distinct "+alias+".id)").As("items_count"))
		}

		if options.Fields.NewItemsCount {
			columns = append(columns, goqu.L(`
				count(distinct if(`+alias+`.add_datetime > date_sub(NOW(), INTERVAL ? DAY), `+alias+`.id, null))
			`, NewDays).As("new_items_count"))
		}

		if options.Fields.DescendantsCount {
			columns = append(columns, goqu.L(`
				(
					SELECT count(distinct product1.id)
					FROM item AS product1
						JOIN item_parent_cache ON product1.id = item_parent_cache.item_id
					WHERE item_parent_cache.parent_id = `+alias+`.id
						AND item_parent_cache.item_id <> item_parent_cache.parent_id
					LIMIT 1
				) 
			`).As("descendants_count"))
		}

		if options.Fields.NewDescendantsCount {
			columns = append(columns, goqu.L(`
				(
					SELECT count(distinct product2.id)
					FROM item AS product2
						JOIN item_parent_cache ON product2.id = item_parent_cache.item_id
					WHERE item_parent_cache.parent_id = `+alias+`.id
						AND item_parent_cache.item_id <> item_parent_cache.parent_id
						AND product2.add_datetime > DATE_SUB(NOW(), INTERVAL ? DAY)
				) 
			`, NewDays).As("new_descendants_count"))
		}

		sqSelect = sqSelect.SelectAppend(columns...)
	}

	return sqSelect, nil
}

func (s *Repository) Count(ctx context.Context, options ListOptions) (int, error) {
	var err error

	sqSelect := s.db.Select(goqu.L("COUNT(1)")).From(goqu.T("item").As("i"))

	sqSelect, err = applyItem("i", sqSelect, false, &options)
	if err != nil {
		return 0, err
	}

	var count int

	_, err = sqSelect.Executor().ScanValContext(ctx, &count)
	if err != nil {
		return 0, err
	}

	return count, nil
}

func (s *Repository) CountDistinct(ctx context.Context, options ListOptions) (int, error) {
	var err error

	sqSelect := s.db.Select(goqu.L("COUNT(DISTINCT i.id)")).From(goqu.T("item").As("i"))

	sqSelect, err = applyItem("i", sqSelect, false, &options)
	if err != nil {
		return 0, err
	}

	var count int

	_, err = sqSelect.Executor().ScanValContext(ctx, &count)
	if err != nil {
		return 0, err
	}

	return count, nil
}

func (s *Repository) List(ctx context.Context, options ListOptions) ([]Item, error) {
	/*langPriority, ok := languagePriority[options.Language]
	if !ok {
		return nil, fmt.Errorf("language `%s` not found", options.Language)
	}*/
	var err error

	sqSelect := s.db.Select("i.id", "i.catname").From(goqu.T("item").As("i")).GroupBy("i.id")

	sqSelect, err = applyItem("i", sqSelect, true, &options)
	if err != nil {
		return nil, err
	}

	if len(options.OrderBy) > 0 {
		sqSelect = sqSelect.Order(options.OrderBy...)
	}

	if options.Limit > 0 {
		sqSelect = sqSelect.Limit(uint(options.Limit))
	}

	rows, err := sqSelect.Executor().QueryContext(ctx) //nolint:sqlclosecheck
	if err != nil {
		return nil, err
	}
	defer util.Close(rows)

	columnNames, err := rows.Columns()
	if err != nil {
		return nil, err
	}

	var result []Item

	for rows.Next() {
		var r Item

		var catname sql.NullString

		pointers := make([]interface{}, len(columnNames))

		for i, colName := range columnNames {
			switch colName {
			case "id":
				pointers[i] = &r.ID
			case "name":
				pointers[i] = &r.Name
			case "catname":
				pointers[i] = &catname
			case "items_count":
				pointers[i] = &r.ItemsCount
			case "new_items_count":
				pointers[i] = &r.NewItemsCount
			case "descendants_count":
				pointers[i] = &r.DescendantsCount
			case "new_descendants_count":
				pointers[i] = &r.NewDescendantsCount
			case "child_items_count":
				pointers[i] = &r.ChildItemsCount
			case "new_child_items_count":
				pointers[i] = &r.NewChildItemsCount
			default:
				pointers[i] = nil
			}
		}

		err = rows.Scan(pointers...)
		if err != nil {
			return nil, err
		}

		if catname.Valid {
			r.Catname = catname.String
		}

		result = append(result, r)
	}

	if err = rows.Err(); err != nil {
		return nil, err
	}

	if options.SortByName {
		tag := language.English

		switch options.Language {
		case "ru":
			tag = language.Russian
		case "zh":
			tag = language.SimplifiedChinese
		case "fr":
			tag = language.French
		case "es":
			tag = language.Spanish
		case "uk":
			tag = language.Ukrainian
		case "be":
			tag = language.Russian
		case "pt-br":
			tag = language.BrazilianPortuguese
		}

		cyrillic := regexp.MustCompile(`^\p{Cyrillic}`)
		han := regexp.MustCompile(`^\p{Han}`)

		cl := collate.New(tag, collate.IgnoreCase, collate.IgnoreDiacritics)

		sort.SliceStable(result, func(i, j int) bool {
			a := result[i].Name
			b := result[j].Name

			switch options.Language {
			case "ru", "uk", "be":
				aIsCyrillic := cyrillic.MatchString(a)
				bIsCyrillic := cyrillic.MatchString(b)

				if aIsCyrillic && !bIsCyrillic {
					return true
				}

				if bIsCyrillic && !aIsCyrillic {
					return false
				}
			case "zh":
				aIsHan := han.MatchString(a)
				bIsHan := han.MatchString(b)

				if aIsHan && !bIsHan {
					return true
				}

				if bIsHan && !aIsHan {
					return false
				}
			}

			return cl.CompareString(a, b) == -1
		})
	}

	return result, nil
}

func (s *Repository) Tree(ctx context.Context, id string) (*TreeItem, error) {
	type row struct {
		ID       int64    `db:"id"`
		Name     string   `db:"name"`
		ItemType ItemType `db:"item_type_id"`
	}

	var item row

	success, err := s.db.Select("id", "name", "item_type_id").From("item").
		Where(goqu.I("id").Eq(id)).ScanStructContext(ctx, item)
	if err != nil {
		return nil, err
	}

	if !success {
		return nil, nil //nolint: nilnil
	}

	return &TreeItem{
		ID:       item.ID,
		Name:     item.Name,
		ItemType: item.ItemType,
	}, nil
}

func (s *Repository) AddItemVehicleType(ctx context.Context, itemID int64, vehicleTypeID int64) error {
	changed, err := s.setItemVehicleTypeRow(ctx, itemID, vehicleTypeID, false)
	if err != nil {
		return err
	}

	if changed {
		err = s.refreshItemVehicleTypeInheritanceFromParents(ctx, itemID)
		if err != nil {
			return err
		}

		err = s.refreshItemVehicleTypeInheritance(ctx, itemID)
		if err != nil {
			return err
		}
	}

	return nil
}

func (s *Repository) RemoveItemVehicleType(ctx context.Context, itemID int64, vehicleTypeID int64) error {
	res, err := s.db.From("vehicle_vehicle_type").Delete().
		Where(
			goqu.I("vehicle_id").Eq(itemID),
			goqu.I("vehicle_type_id").Eq(vehicleTypeID),
			goqu.L("NOT inherited"),
		).Executor().Exec()
	if err != nil {
		return err
	}

	deleted, err := res.RowsAffected()
	if err != nil {
		return err
	}

	if deleted > 0 {
		err = s.refreshItemVehicleTypeInheritanceFromParents(ctx, itemID)
		if err != nil {
			return err
		}

		err = s.refreshItemVehicleTypeInheritance(ctx, itemID)
		if err != nil {
			return err
		}
	}

	return nil
}

func (s *Repository) setItemVehicleTypeRow(
	ctx context.Context,
	itemID int64,
	vehicleTypeID int64,
	inherited bool,
) (bool, error) {
	res, err := s.db.ExecContext(
		ctx,
		`
			INSERT INTO vehicle_vehicle_type (vehicle_id, vehicle_type_id, inherited)
			VALUES (?, ?, ?)
			ON DUPLICATE KEY UPDATE inherited = VALUES(inherited)
        `,
		itemID, vehicleTypeID, inherited,
	)
	if err != nil {
		return false, err
	}

	affected, err := res.RowsAffected()
	if err != nil {
		return false, err
	}

	return affected > 0, nil
}

func (s *Repository) refreshItemVehicleTypeInheritanceFromParents(ctx context.Context, itemID int64) error {
	typeIds, err := s.getItemVehicleTypeIDs(ctx, itemID, false)
	if err != nil {
		return err
	}

	if len(typeIds) > 0 {
		// do not inherit when own value
		res, err := s.db.ExecContext(
			ctx,
			"DELETE FROM vehicle_vehicle_type WHERE vehicle_id = ? AND inherited",
			itemID,
		)
		if err != nil {
			return err
		}

		affected, err := res.RowsAffected()
		if err != nil {
			return err
		}

		if affected > 0 {
			err = s.refreshItemVehicleTypeInheritance(ctx, itemID)
			if err != nil {
				return err
			}
		}

		return nil
	}

	types, err := s.getItemVehicleTypeInheritedIDs(ctx, itemID)
	if err != nil {
		return err
	}

	changed, err := s.setItemVehicleTypeRows(ctx, itemID, types, true)
	if err != nil {
		return err
	}

	if changed {
		err := s.refreshItemVehicleTypeInheritance(ctx, itemID)
		if err != nil {
			return err
		}
	}

	return nil
}

func (s *Repository) refreshItemVehicleTypeInheritance(ctx context.Context, itemID int64) error {
	rows, err := s.db.QueryContext(
		ctx,
		"SELECT item_id FROM item_parent WHERE parent_id = ?",
		itemID,
	)
	if err != nil {
		return err
	}

	defer util.Close(rows)

	for rows.Next() {
		var childID int64

		err = rows.Scan(&childID)
		if err != nil {
			return err
		}

		err = s.refreshItemVehicleTypeInheritanceFromParents(ctx, childID)
		if err != nil {
			return err
		}
	}

	return rows.Err()
}

func (s *Repository) getItemVehicleTypeIDs(ctx context.Context, itemID int64, inherited bool) ([]int64, error) {
	sqlSelect := s.db.From("vehicle_vehicle_type").Select("vehicle_type_id").Where(
		goqu.I("vehicle_id").Eq(itemID),
	)
	if inherited {
		sqlSelect = sqlSelect.Where(goqu.L("inherited"))
	} else {
		sqlSelect = sqlSelect.Where(goqu.L("NOT inherited"))
	}

	res := make([]int64, 0)

	err := sqlSelect.ScanValsContext(ctx, &res)

	return res, err
}

func (s *Repository) getItemVehicleTypeInheritedIDs(ctx context.Context, itemID int64) ([]int64, error) {
	sqlSelect := s.db.From("vehicle_vehicle_type").
		Select("vehicle_type_id").Distinct().
		Join(goqu.T("item_parent"), goqu.On(goqu.Ex{"vehicle_vehicle_type.vehicle_id": goqu.I("item_parent.parent_id")})).
		Where(goqu.I("item_parent.item_id").Eq(itemID))

	res := make([]int64, 0)

	err := sqlSelect.ScanValsContext(ctx, &res)

	return res, err
}

func (s *Repository) setItemVehicleTypeRows(
	ctx context.Context,
	itemID int64,
	types []int64,
	inherited bool,
) (bool, error) {
	changed := false

	for _, t := range types {
		rowChanged, err := s.setItemVehicleTypeRow(ctx, itemID, t, inherited)
		if err != nil {
			return false, err
		}

		if rowChanged {
			changed = true
		}
	}

	sqlDelete := s.db.From("vehicle_vehicle_type").Delete().
		Where(goqu.I("vehicle_id").Eq(itemID))

	if len(types) > 0 {
		sqlDelete = sqlDelete.Where(goqu.I("vehicle_type_id").NotIn(types))
	}

	res, err := sqlDelete.Executor().Exec()
	if err != nil {
		return false, err
	}

	deleted, err := res.RowsAffected()
	if err != nil {
		return false, err
	}

	if deleted > 0 {
		changed = true
	}

	return changed, nil
}

type parentInfo struct {
	Diff   int64
	Tuning bool
	Sport  bool
	Design bool
}

func (s *Repository) collectParentInfo(ctx context.Context, id int64, diff int64) (map[int64]parentInfo, error) {
	//nolint: sqlclosecheck
	rows, err := s.db.Select("parent_id", "type").
		From("item_parent").
		Where(goqu.Ex{"item_id": id}).
		Executor().QueryContext(ctx)
	if err != nil {
		return nil, err
	}
	defer util.Close(rows)

	result := make(map[int64]parentInfo, 0)

	for rows.Next() {
		var parentID, typeID int64

		err = rows.Scan(&parentID, &typeID)
		if err != nil {
			return nil, err
		}

		isTuning := typeID == ItemParentTypeTuning
		isSport := typeID == ItemParentTypeSport
		isDesign := typeID == ItemParentTypeDesign
		result[parentID] = parentInfo{
			Diff:   diff,
			Tuning: isTuning,
			Sport:  isSport,
			Design: isDesign,
		}

		parentInfos, err := s.collectParentInfo(ctx, parentID, diff+1)
		if err != nil {
			return nil, err
		}

		for pid, info := range parentInfos {
			val, ok := result[pid]

			if !ok || info.Diff < val.Diff {
				val = info
				val.Tuning = result[pid].Tuning || isTuning
				val.Sport = result[pid].Sport || isSport
				val.Design = result[pid].Design || isDesign
				result[pid] = val
			}
		}
	}

	if err = rows.Err(); err != nil {
		return nil, err
	}

	return result, nil
}

func (s *Repository) getChildItemsIDs(ctx context.Context, parentID int64) ([]int64, error) {
	vals := make([]int64, 0)

	err := s.db.Select("item_id").
		From("item_parent").
		Where(goqu.Ex{"parent_id": parentID}).
		Executor().ScanValsContext(ctx, &vals)
	if err != nil {
		return nil, err
	}

	return vals, nil
}

func (s *Repository) RebuildCache(ctx context.Context, itemID int64) (int64, error) {
	parentInfos, err := s.collectParentInfo(ctx, itemID, 1)
	if err != nil {
		return 0, err
	}

	parentInfos[itemID] = parentInfo{
		Diff:   0,
		Tuning: false,
		Sport:  false,
		Design: false,
	}

	var updates int64

	//nolint: sqlclosecheck
	stmt, err := s.db.PrepareContext(ctx, `
   		INSERT INTO item_parent_cache (item_id, parent_id, diff, tuning, sport, design)
		VALUES (?, ?, ?, ?, ?, ?)
		ON DUPLICATE KEY UPDATE
			diff = VALUES(diff),
			tuning = VALUES(tuning),
			sport = VALUES(sport),
			design = VALUES(design)
	`)
	if err != nil {
		return 0, err
	}
	defer util.Close(stmt)

	for parentID, info := range parentInfos {
		result, err := stmt.ExecContext(ctx, itemID, parentID, info.Diff, info.Tuning, info.Sport, info.Design)
		if err != nil {
			return 0, err
		}

		affected, err := result.RowsAffected()
		if err != nil {
			return 0, err
		}

		updates += affected
	}

	keys := make([]int64, len(parentInfos))

	i := 0

	for k := range parentInfos {
		keys[i] = k
		i++
	}

	_, err = s.db.Delete("item_parent_cache").Where(goqu.Ex{
		"item_id":   itemID,
		"parent_id": goqu.Op{"notIn": keys},
	}).Executor().ExecContext(ctx)
	if err != nil {
		return 0, err
	}

	childs, err := s.getChildItemsIDs(ctx, itemID)
	if err != nil {
		return 0, err
	}

	for _, child := range childs {
		affected, err := s.RebuildCache(ctx, child)
		if err != nil {
			return 0, err
		}

		updates += affected
	}

	return updates, nil
}