package storage

import (
	"fmt"
	"strconv"

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

type SellerApi interface {
	Get(id uint) (seller v2.Seller, err error)
	GetBySellerId(sellerId v2.SellerId) (seller v2.Seller, err error)
	List(query PageListQuery) (sellers []v2.Seller, total int64, err error)
	Create(seller v2.Seller) error
	Update(seller v2.Seller) error
	Delete(id uint) (seller v2.Seller, err error)
	AutoMigrate() error
}

func NewSellerApi(db *gorm.DB) SellerApi {
	return &sellerApi{db: db}
}

type sellerApi struct {
	db *gorm.DB
}

type ListSellerQuery struct {
	ID       uint   `query:"id"`
	SellerId string `query:"sellerId"`
	Keyword  string `query:"keyword"`
}

func (g *ListSellerQuery) Scope(db *gorm.DB) *gorm.DB {
	if g.ID > 0 {
		db = db.Where("id=?", g.ID)
	}
	if g.SellerId != "" {
		db = db.Where("seller_id = ?", g.SellerId)
	}
	if g.Keyword != "" {
		db = db.Where("name LIKE ?", "%"+g.Keyword+"%")
	}
	return db
}

func (p *sellerApi) Get(id uint) (seller v2.Seller, err error) {
	err = p.db.Where("id = ?", id).Preload("CalculateProcess").First(&seller).Error
	return
}

func (p *sellerApi) GetBySellerId(sellerId v2.SellerId) (seller v2.Seller, err error) {
	err = p.db.Where("seller_id = ?", sellerId).Preload("CalculateProcess").First(&seller).Error
	return
}

func (p *sellerApi) List(query PageListQuery) (sellers []v2.Seller, total int64, err error) {
	err = p.db.Scopes(query.Scoper.Scope).Model(&v2.Seller{}).Count(&total).Error
	if err != nil {
		return
	}
	err = p.db.Scopes(query.Scope).Find(&sellers).Error
	return
}

func (p *sellerApi) Create(seller v2.Seller) error {
	if seller.SellerId == "" {
		return fmt.Errorf("标识为空")
	}
	if seller.Name == "" {
		return fmt.Errorf("名称为空")
	}
	return p.db.Create(&seller).Error
}

func (p *sellerApi) Update(seller v2.Seller) error {
	if seller.SellerId == "" {
		return fmt.Errorf("标识为空")
	}

	return p.db.Transaction(func(tx *gorm.DB) error {
		ids := lo.Map(lo.Filter(seller.CalculateProcess, func(item v2.CalculateProcess, index int) bool { return item.ID > 0 }), func(item v2.CalculateProcess, index int) string {
			return strconv.Itoa(int(item.ID))
		})

		// 删除已经没有的CalculateProcess
		if err := tx.Not(ids).Where("owner_id = ? AND kind = ?", seller.ID, "seller").Delete(&v2.CalculateProcess{}).Error; err != nil {
			return err
		}

		// 更新方案的name和描述
		return tx.Session(&gorm.Session{FullSaveAssociations: true}).Select("updated_at", "name", "config", "mark", "CalculateProcess").
			Where("id = ?", seller.ID).Updates(&seller).Error
	})
}

func (p *sellerApi) Delete(id uint) (seller v2.Seller, err error) {
	err = p.db.Transaction(func(tx *gorm.DB) error {
		if err = tx.Where("owner_id = ? AND kind = ?", id, "seller").Delete(&v2.CalculateProcess{}).Error; err != nil {

		}
		return p.db.Clauses(clause.Returning{}).Where("id = ?", id).Delete(&seller).Error
	})
	return
}

func (p *sellerApi) AutoMigrate() error {
	return p.db.AutoMigrate(&v2.Seller{}, &v2.CalculateProcess{})
}