package service

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

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).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 newProducts {
		totalAmount = totalAmount.Add(product.Amount.Mul(product.Price))
	}
	removedProductIds := make([]uint, 0, len(removedProducts))
	for _, product := range removedProducts {
		totalAmount = totalAmount.Sub(product.Amount.Mul(product.Price))
		removedProductIds = append(removedProductIds, product.Id)
	}
	serviceContract.AmountTotal = totalAmount.Round(2)
	serviceContract.AmountReceivable = serviceContract.AmountTotal.Sub(serviceContract.AmountReceived)
	serviceContract.AmountUnInvoiced = serviceContract.AmountTotal.Sub(serviceContract.AmountInvoiced)

	err = model.NewServiceContractSearch().SetId(serviceContract.Id).Update(serviceContract)
	if err != nil {
		return ecode.SContractSetErr
	}

	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(page, pageSize int, queryClass constvar.ServiceContractQueryClass, keywordType constvar.ServiceContractKeywordType, keyword string) ([]*model.ServiceContract, int64, int) {
	// get contact list
	contacts, total, err := model.NewServiceContractSearch().
		SetKeyword(keyword).
		SetKeywordType(keywordType).
		SetQueryClass(queryClass).
		SetPage(page, pageSize).
		SetPreload(true).
		Find()
	if err != nil {
		return nil, 0, ecode.SContractListErr
	}
	return contacts, total, ecode.OK
}