package storage

import (
	"fmt"

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

type ArticleApi interface {
	Create(article *v2.Article) error
	Upsert(article v2.Article) error
	Update(article v2.Article, selects ...string) error
	Find(query *FindArticleQuery) (articles []v2.Article, err error)
	List(query PageListQuery, scopes ...func(db *gorm.DB) *gorm.DB) (articles []v2.Article, total int64, err error)
	Get(query *GetArticleQuery) (article v2.Article, err error)
	AutoMigrate() error
}

type articleApi struct {
	db *gorm.DB
}

func NewArticleApi(db *gorm.DB) ArticleApi {
	return &articleApi{
		db: db,
	}
}

func (a *articleApi) Create(article *v2.Article) error {
	return a.db.Create(article).Error
}

// Upsert 插入或者更新商品
func (a *articleApi) Upsert(article v2.Article) error {
	return a.db.Transaction(func(tx *gorm.DB) error {
		if err := tx.Clauses(clause.OnConflict{
			Columns:   []clause.Column{{Name: "pid"}, {Name: "brand"}},
			DoUpdates: clause.AssignmentColumns([]string{"available", "updated_at", "cost_price", "sell_price", "rate", "remark", "exclude"}),
		}).Create(&article).Error; err != nil {
			return err
		}
		if len(article.Providers) > 0 {
			if err := tx.Save(&article.Providers).Error; err != nil {
				return fmt.Errorf("failed to save providers: %v", err)
			}
		}
		if len(article.Sellers) > 0 {
			return tx.Save(&article.Sellers).Error
		}
		return nil
	})
}

func (a *articleApi) Update(article v2.Article, selects ...string) error {
	if len(selects) == 0 {
		selects = []string{"Remark", "Exclude"}
	}
	return a.db.Model(&article).Select(selects).Omit(clause.Associations).Updates(article).Error
}

// ******************Find和List

type FindArticleQuery struct {
	ID        uint     `query:"id"`
	Keyword   string   `query:"keyword"`
	Brand     v2.Brand `query:"brand"`
	Pid       string   `query:"pid"`
	Available *bool    `query:"available"`           //可购买
	RateSort  string   `query:"rate_sort,omitempty"` // 收益率排序
}

func NewFindArticleQuery() *FindArticleQuery {
	return &FindArticleQuery{}
}
func (f *FindArticleQuery) SetID(id uint) *FindArticleQuery {
	f.ID = id
	return f
}
func (f *FindArticleQuery) SetKeyword(keyword string) *FindArticleQuery {
	f.Keyword = keyword
	return f
}
func (f *FindArticleQuery) SetBrand(brand v2.Brand) *FindArticleQuery {
	f.Brand = brand
	return f
}
func (f *FindArticleQuery) SetPid(pid string) *FindArticleQuery {
	f.Pid = pid
	return f
}
func (f *FindArticleQuery) SetAvailable(available bool) *FindArticleQuery {
	f.Available = &available
	return f
}

func (f *FindArticleQuery) Scope(db *gorm.DB) *gorm.DB {
	if f.ID != 0 {
		db = db.Where("id=?", f.ID)
	}
	if f.Keyword != "" {
		db = db.Where("(name ilike ? OR english_name ilike ? OR remark ilike ? OR pid ilike ?)", "%"+f.Keyword+"%", "%"+f.Keyword+"%", "%"+f.Keyword+"%", "%"+f.Keyword+"%")
	}
	if f.Brand != "" {
		db = db.Where("brand=?", f.Brand)
	}
	if f.Pid != "" {
		db = db.Where("pid=?", f.Pid)
	}
	if f.Available != nil {
		db = db.Where("available=?", *f.Available)
	}
	return db
}

func (f *FindArticleQuery) SortScope(db *gorm.DB) *gorm.DB {
	if f.RateSort == "descend" {
		db = db.Order("rate desc")
	} else if f.RateSort == "ascend" {
		db = db.Order("rate asc")
	} else {
		db = db.Order("id desc")
	}
	return db
}
func (a *articleApi) Find(query *FindArticleQuery) (articles []v2.Article, err error) {
	err = a.db.Scopes(query.Scope).Find(&articles).Error
	return
}

func (a *articleApi) List(query PageListQuery, scopes ...func(db *gorm.DB) *gorm.DB) (articles []v2.Article, total int64, err error) {
	err = a.db.Scopes(query.Scoper.Scope).Model(&v2.Article{}).Count(&total).Error
	if err != nil {
		return
	}
	err = a.db.Scopes(query.Scope).Scopes(scopes...).Find(&articles).Error
	return
}

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

type GetArticleQuery struct {
	ID      uint     `query:"id"`
	Brand   v2.Brand `query:"brand"`
	Pid     string   `query:"pid"`
	History bool     `query:"history"`
}

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

func (g *GetArticleQuery) SetBrand(brand v2.Brand) *GetArticleQuery {
	g.Brand = brand
	return g
}
func (g *GetArticleQuery) SetPid(pid string) *GetArticleQuery {
	g.Pid = pid
	return g
}
func (g *GetArticleQuery) SetHistory(history bool) *GetArticleQuery {
	g.History = history
	return g
}

func NewGetArticleQuery() *GetArticleQuery {
	return &GetArticleQuery{}
}

func (g *GetArticleQuery) Scope(db *gorm.DB) *gorm.DB {
	db = db.Preload("Providers").Preload("Providers.CalculateProcess").Preload("Sellers").Preload("Sellers.CalculateProcess")
	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.History {
		db = db.Preload("Providers.HistoryPrice").Preload("Sellers.HistoryPrice")
	}
	return db
}

func (a *articleApi) Get(query *GetArticleQuery) (article v2.Article, err error) {
	err = a.db.Scopes(query.Scope).First(&article).Error
	return
}

func (a *articleApi) AutoMigrate() error {
	return a.db.AutoMigrate(&v2.Article{})
}