package storage

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

// ProviderArticleApi 管理供应商商品的接口
type ProviderArticleApi interface {
	Get(query *GetProviderArticleQuery) (article v2.ProviderArticle, err error)
	Upsert(article v2.ProviderArticle) error
	Update(providerArticle v2.ProviderArticle, selects ...string) error
	BatchUpdate(articles []v2.ProviderArticle) error
	AutoMigrate() error
	FindInBatches(query *GetProviderArticleQuery, results *[]v2.ProviderArticle, f func(tx *gorm.DB, batch int) error) error
	ProviderPrice(providerArticleID uint) (history []v2.ProviderPrice, err error)
}

type providerArticleApi struct {
	db *gorm.DB
}

func NewProviderArticleApi(db *gorm.DB) ProviderArticleApi {
	return &providerArticleApi{db: db}
}

// ******************GET

type GetProviderArticleQuery struct {
	ID         uint          `query:"id"`
	Brand      v2.Brand      `query:"brand"`
	Pid        string        `query:"pid"`
	ProviderId v2.ProviderId `query:"providerId"`
	SkuId      string        `query:"skuId"`
}

func NewGetProviderArticleQuery() *GetProviderArticleQuery {
	return &GetProviderArticleQuery{}
}

func (g *GetProviderArticleQuery) SetID(id uint) *GetProviderArticleQuery {
	g.ID = id
	return g
}
func (g *GetProviderArticleQuery) SetBrand(brand v2.Brand) *GetProviderArticleQuery {
	g.Brand = brand
	return g
}
func (g *GetProviderArticleQuery) SetPid(pid string) *GetProviderArticleQuery {
	g.Pid = pid
	return g
}

func (g *GetProviderArticleQuery) SetProviderId(providerId v2.ProviderId) *GetProviderArticleQuery {
	g.ProviderId = providerId
	return g
}

func (g *GetProviderArticleQuery) SetSkuId(skuId string) *GetProviderArticleQuery {
	g.SkuId = skuId
	return g
}

func (g *GetProviderArticleQuery) 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.ProviderId != "" {
		db = db.Where("provider_id=?", g.ProviderId)
	}
	if g.SkuId != "" {
		db = db.Where("sku_id=?", g.SkuId)
	}
	return db
}

func (p *providerArticleApi) Get(query *GetProviderArticleQuery) (article v2.ProviderArticle, err error) {
	err = p.db.Scopes(query.Scope).Preload("CalculateProcess").First(&article).Error
	return
}

func (p *providerArticleApi) Upsert(article v2.ProviderArticle) error {
	if err := p.db.Clauses(clause.OnConflict{
		Columns:   []clause.Column{{Name: "provider_id"}, {Name: "sku_id"}},
		DoUpdates: clause.AssignmentColumns([]string{"cost", "available", "updated_at"}),
	}).Create(&article).Error; err != nil {
		return err
	}
	if len(article.HistoryPrice) > 0 {
		return p.db.Save(&article.HistoryPrice).Error
	}
	return nil
}

func (p *providerArticleApi) FindInBatches(query *GetProviderArticleQuery, results *[]v2.ProviderArticle, 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 *providerArticleApi) BatchUpdate(articles []v2.ProviderArticle) error {
	return p.db.Select("id", "cost").Save(&articles).Error
}

func (p *providerArticleApi) AutoMigrate() error {
	return p.db.AutoMigrate(&v2.ProviderArticle{}, &v2.ProviderPrice{})
}

func (p *providerArticleApi) ProviderPrice(providerArticleID uint) (history []v2.ProviderPrice, err error) {
	err = p.db.Find(&history, "provider_article_id = ?", providerArticleID).Error
	return
}

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