package service

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

type SContractService struct{}

func (SContractService) AddServiceContract(serviceContract *model.ServiceContract) int {
	serviceContract.AmountReceivable = decimal.Zero.Round(2)
	serviceContract.AmountInvoiced = decimal.Zero.Round(2)
	serviceContract.AmountReceived = decimal.Zero.Round(2)
	serviceContract.AmountUnInvoiced = decimal.Zero.Round(2)
	serviceContract.AmountTotal = decimal.Zero.Round(2)
	for _, product := range serviceContract.Products {
		serviceContract.AmountTotal = serviceContract.AmountTotal.Add(product.Amount.Mul(product.Price))
	}
	serviceContract.AmountTotal = serviceContract.AmountTotal.Round(2)
	serviceContract.AmountReceivable = serviceContract.AmountTotal
	serviceContract.AmountUnInvoiced = serviceContract.AmountTotal

	err := model.NewServiceContractSearch().Create(serviceContract)
	if err != nil {
		return ecode.SContractExist
	}

	return ecode.OK
}

func (SContractService) UpdateServiceContract(serviceContract *model.ServiceContract) int {
	// check serviceContract exist
	old, err := model.NewServiceContractSearch().SetId(serviceContract.Id).SetPreload(true).First()
	if err != nil {
		return ecode.SContractNotExist
	}
	var totalAmount decimal.Decimal
	totalAmount = serviceContract.AmountTotal
	newProducts, removedProducts := NewProductsService().PickDiffProducts(serviceContract.Products, old.Products)
	for _, product := range serviceContract.Products {
		totalAmount = totalAmount.Add(product.Amount.Mul(product.Price))
	}
	serviceContract.AmountTotal = totalAmount.Round(2)
	serviceContract.AmountReceivable = serviceContract.AmountTotal.Sub(serviceContract.AmountReceived)
	serviceContract.AmountUnInvoiced = serviceContract.AmountTotal.Sub(serviceContract.AmountInvoiced)
	err = model.WithTransaction(func(db *gorm.DB) error {
		err := model.NewServiceContractSearch().SetId(serviceContract.Id).Update(serviceContract)
		if err != nil {
			return err
		}
		if len(removedProducts) > 0 {
			removedProductIds := make([]uint, 0, len(removedProducts))
			for _, product := range removedProducts {
				removedProductIds = append(removedProductIds, product.Id)
			}
			err = model.NewProductSearch(db).SetIds(removedProductIds).Delete()
			if err != nil {
				return err
			}
		}
		if len(newProducts) > 0 {
			for _, p := range newProducts {
				p.Id = 0
			}
			err = model.NewProductSearch(db).CreateBatch(newProducts)
			if err != nil {
				return err
			}
			var rel []*model.ServiceContractProduct
			for _, p := range newProducts {
				rel = append(rel, &model.ServiceContractProduct{
					ServiceContractId: serviceContract.Id,
					ProductId:         p.Id,
				})
			}
			err = model.NewServiceContractProductSearch().CreateBatch(rel)
			if err != nil {
				return err
			}
		}
		return nil
	})

	if err != nil {
		return ecode.DBErr
	}

	return ecode.OK
}

//func (SContractService) GetServiceContractByContractId(contractId int) ([]*model.ServiceContract, int) {
//	list, err := model.NewServiceContractSearch().SetId(contractId).FindAll()
//	if err != nil {
//		return nil, ecode.SContractListErr
//	}
//
//	return list, ecode.OK
//}

func (SContractService) DeleteServiceContract(ids []int) int {
	// delete client
	err := model.NewServiceContractSearch().SetIds(ids).Delete()
	if err != nil {
		return ecode.SContractDeleteErr
	}
	return ecode.OK
}

func (SContractService) BatchDeleteServiceContract(ids []int) int {
	err := model.NewServiceContractSearch().DeleteByIds(ids)
	if err != nil {
		return ecode.DBErr
	}
	return ecode.OK
}

func (SContractService) GetServiceContractList(params request.GetServiceContractList, memberIds []int) ([]*model.ServiceContract, int64, int) {
	// get contact list
	contacts, total, err := model.NewServiceContractSearch().
		SetKeyword(params.Keyword).
		SetKeywordType(params.KeywordType).
		SetQueryClass(params.QueryClass).
		SetPage(params.Page, params.PageSize).
		SetSalesDetailsId(params.SalesDetailsId).
		SetQuotationId(params.QuotationId).
		SetSaleChanceId(params.SaleChanceId).
		SetContactId(params.ContactId).
		SetMemberIds(memberIds).
		SetPreload(true).
		Find()
	if err != nil {
		return nil, 0, ecode.SContractListErr
	}
	return contacts, total, ecode.OK
}