package class

import (
	"git.sxidc.com/go-framework/baize/domain"
	"git.sxidc.com/go-tools/utils/strutils"
	"git.sxidc.com/service-supports/fserr"
)

const (
	TableName = "test.classes"
)

const (
	ColumnName       = "name"
	ColumnStudentNum = "student_num"
)

const (
	domainCNName = "班级"
)

const (
	fieldNameMaxLen = 128
)

type Entity struct {
	domain.BaseEntity
	Name       string `sqlmapping:"column:name" sqlresult:"column:name"`
	StudentNum int    `sqlmapping:"column:student_num;updateClear;" sqlresult:"column:student_num"`
	domain.TimeFields
}

func (e *Entity) DomainCNName() string {
	return domainCNName
}

func (e *Entity) ForCreate() error {
	err := e.CheckFieldID()
	if err != nil {
		return err
	}

	err = e.checkFieldName()
	if err != nil {
		return err
	}

	return nil
}

func (e *Entity) ForUpdate() error {
	err := e.CheckFieldID()
	if err != nil {
		return err
	}

	err = e.checkUpdateFields()
	if err != nil {
		return err
	}

	return nil
}

func (e *Entity) checkFieldName() error {
	if strutils.IsStringEmpty(e.Name) {
		return fserr.New(domainCNName + "名称为空")
	}

	if len(e.Name) > fieldNameMaxLen {
		return fserr.New(domainCNName + "名称超出限定长度")
	}

	return nil
}

func (e *Entity) checkUpdateFields() error {
	if strutils.AllBlank(e.Name) {
		return fserr.New(domainCNName + "没有传递需要更新的字段")
	}

	if strutils.IsStringNotEmpty(e.Name) && len(e.Name) > fieldNameMaxLen {
		return fserr.New(domainCNName + "名称超出限定长度")
	}

	return nil
}