package service

import (
	"aps_crm/constvar"
	"aps_crm/model"
	"aps_crm/pkg/ecode"
	"github.com/shopspring/decimal"
	"gorm.io/gorm"
)

type SalesReturnService struct{}

func (slf SalesReturnService) AddSalesReturn(salesReturn *model.SalesReturn) int {
	salesReturn.AmountShouldRefund = decimal.Zero
	salesReturn.AmountHasRefund = decimal.Zero
	salesReturn.AmountTotal = decimal.Zero
	for _, product := range salesReturn.Products {
		salesReturn.AmountTotal = salesReturn.AmountTotal.Add(product.Amount.Mul(product.Price))
	}
	salesReturn.AmountShouldRefund = salesReturn.AmountTotal
	err := model.NewSalesReturnSearch().Create(salesReturn)
	if err != nil {
		return ecode.SalesReturnExist
	}

	return ecode.OK
}

func (slf SalesReturnService) DeleteSalesReturn(id int) int {
	_, err := model.NewSalesReturnSearch().SetId(id).First()
	if err != nil {
		return ecode.SalesReturnNotExist
	}
	err = model.WithTransaction(func(db *gorm.DB) error {
		err = model.NewSalesReturnSearch().SetId(id).Delete()
		if err != nil {
			return err
		}
		err = model.NewSalesRefundSearch().SetSourceType(constvar.RefundSourceTypeSalesReturn).SetSourceId(id).Delete()
		if err != nil {
			return err
		}
		return nil
	})
	if err != nil {
		return ecode.SalesReturnNotExist
	}
	return ecode.OK
}

func (slf SalesReturnService) BatchDeleteSalesReturn(ids []int) (failIds []int, code int) {
	for _, id := range ids {
		code = slf.DeleteSalesReturn(id)
		if code != ecode.OK {
			failIds = append(failIds, id)
		}
	}
	return failIds, code
}

func (SalesReturnService) UpdateSalesReturn(salesReturn *model.SalesReturn) int {
	// check salesReturn exist
	_, err := model.NewSalesReturnSearch().SetId(salesReturn.Id).First()
	if err != nil {
		return ecode.SalesReturnNotExist
	}

	salesReturn.AmountShouldRefund = decimal.Zero
	salesReturn.AmountHasRefund = decimal.Zero
	salesReturn.AmountTotal = decimal.Zero
	for _, product := range salesReturn.Products {
		salesReturn.AmountTotal = salesReturn.AmountTotal.Add(product.Amount.Mul(product.Price))
	}
	salesReturn.AmountShouldRefund = salesReturn.AmountTotal

	err = model.NewSalesReturnSearch().SetId(salesReturn.Id).Update(salesReturn)
	if err != nil {
		return ecode.SalesReturnSetErr
	}

	return ecode.OK
}

func (SalesReturnService) GetSalesReturnList(page, pageSize int, keywordType constvar.SalesReturnKeywordType, keyword string) ([]*model.SalesReturn, int64, int) {
	// get contact list
	contacts, total, err := model.NewSalesReturnSearch().
		SetKeywordType(keywordType).
		SetKeyword(keyword).
		SetPage(page, pageSize).
		SetPreload(true).
		FindAll()
	if err != nil {
		return nil, 0, ecode.SalesReturnListErr
	}
	return contacts, total, ecode.OK
}

func (SalesReturnService) GetSalesReturnListByIds(ids []int) ([]*model.SalesReturn, int) {
	// get contact list
	salesReturns, err := model.NewSalesReturnSearch().
		SetIds(ids).
		Find()
	if err != nil {
		return nil, ecode.SalesReturnListErr
	}
	return salesReturns, ecode.OK
}