package storage

import (
	v2 "gitea.timerzz.com/kedaya_haitao/common/structs/v2"
	"gorm.io/gorm"
	"gorm.io/gorm/clause"
)

// SellerArticleApi 管理供应商商品的接口
type SellerArticleApi interface {
	Get(query *GetSellerArticleQuery) (article v2.SellerArticle, err error)
	Upsert(article v2.SellerArticle) error
	Update(sellerArticle v2.SellerArticle, selects ...string) error
	FindInBatches(query *GetSellerArticleQuery, results *[]v2.SellerArticle, f func(tx *gorm.DB, batch int) error) error
	AutoMigrate() error
	SellerPrice(query *GetSellerArticleQuery) (history v2.SellerPrice, err error)
}

type sellerArticleApi struct {
	db *gorm.DB
}

func NewSellerArticleApi(db *gorm.DB) SellerArticleApi {
	return &sellerArticleApi{db: db}
}

type GetSellerArticleQuery struct {
	ID       uint        `query:"id"`
	Brand    v2.Brand    `query:"brand"`
	Pid      string      `query:"pid"`
	SellerId v2.SellerId `query:"sellerId"`
	SkuId    string      `query:"skuId"`
}

func NewGetSellerArticleQuery() *GetSellerArticleQuery {
	return &GetSellerArticleQuery{}
}

func (g *GetSellerArticleQuery) SetID(id uint) *GetSellerArticleQuery {
	g.ID = id
	return g
}

func (g *GetSellerArticleQuery) SetBrand(brand v2.Brand) *GetSellerArticleQuery {
	g.Brand = brand
	return g
}
func (g *GetSellerArticleQuery) SetPid(pid string) *GetSellerArticleQuery {
	g.Pid = pid
	return g
}
func (g *GetSellerArticleQuery) SetSellerId(sellerId v2.SellerId) *GetSellerArticleQuery {
	g.SellerId = sellerId
	return g
}
func (g *GetSellerArticleQuery) SetSkuId(skuId string) *GetSellerArticleQuery {
	g.SkuId = skuId
	return g
}

func (g *GetSellerArticleQuery) Scope(db *gorm.DB) *gorm.DB {
	if g.ID > 0 {
		db = db.Where("id=?", g.ID)
	}
	if g.Brand != "" {
		db = db.Where("brand=?", g.Brand)
	}
	if g.Pid != "" {
		db = db.Where("pid=?", g.Pid)
	}
	if g.SellerId != "" {
		db = db.Where("seller_id=?", g.SellerId)
	}
	if g.SkuId != "" {
		db = db.Where("sku_id=?", g.SkuId)
	}
	return db
}

func (p *sellerArticleApi) Get(query *GetSellerArticleQuery) (article v2.SellerArticle, err error) {
	err = p.db.Scopes(query.Scope).First(&article).Error
	return
}

func (p *sellerArticleApi) Upsert(article v2.SellerArticle) error {
	if err := p.db.Clauses(clause.OnConflict{
		Columns:   []clause.Column{{Name: "id"}},
		DoUpdates: clause.AssignmentColumns([]string{"sell", "exclude"}),
	}).Create(&article).Error; err != nil {
		return err
	}
	if len(article.HistoryPrice) > 0 {
		return p.db.Save(&article.HistoryPrice).Error
	}
	return nil
}

func (p *sellerArticleApi) FindInBatches(query *GetSellerArticleQuery, results *[]v2.SellerArticle, f func(tx *gorm.DB, batch int) error) error {
	err := p.db.Scopes(query.Scope).Preload("CalculateProcess").FindInBatches(results, 20, f).Error
	return err
}

// 批量更新，更新价格时用到
func (p *sellerArticleApi) BatchUpdate(articles []v2.SellerArticle) error {
	return p.db.Select("id", "sell").Save(&articles).Error
}

func (p *sellerArticleApi) AutoMigrate() error {
	return p.db.AutoMigrate(&v2.SellerArticle{}, &v2.SellerPrice{})
}

func (p *sellerArticleApi) SellerPrice(query *GetSellerArticleQuery) (history v2.SellerPrice, err error) {
	err = p.db.Scopes(query.Scope).Find(&history).Error
	return
}

func (p *sellerArticleApi) Update(sellerArticle v2.SellerArticle, selects ...string) error {
	if len(selects) == 0 {
		selects = []string{"Exclude"}
	}
	return p.db.Model(&sellerArticle).Select(selects).Omit(clause.Associations).Updates(&sellerArticle).Error
}