package class

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

const (
	FieldName       = "Name"
	FieldStudentNum = "StudentNum"
)

var (
	ColumnName       = domain.ColumnName(FieldName)
	ColumnStudentNum = domain.ColumnName(FieldStudentNum)
)

var fieldMap = map[string]string{
	FieldName:       "班名",
	FieldStudentNum: "学生数量",
}

type Entity struct {
	entity.Base
	Name       string   `sqlmapping:"column:name" sqlresult:"column:name" check:"required,lte=128"`
	StudentNum int      `sqlmapping:"column:student_num;updateClear;" sqlresult:"column:student_num"`
	StudentIDs []string `sqlmapping:"-" sqlresult:"-"`
	entity.TimeFields
}

func (e *Entity) DomainCNName() string {
	return "班级"
}

func (e *Entity) DomainCamelName() string {
	return "Class"
}

func (e *Entity) ForCreate() error {
	checkResult := check.Struct(e, fieldMap)

	err := entity.CheckFieldIDResult(checkResult)
	if err != nil {
		return err
	}

	err = domain.CheckField(checkResult, e.DomainCNName(), FieldName)
	if err != nil {
		return err
	}

	return nil
}

func (e *Entity) ForDelete() error {
	checkResult := check.Struct(e, fieldMap)

	err := entity.CheckFieldIDResult(checkResult)
	if err != nil {
		return err
	}

	return nil
}

func (e *Entity) ForUpdate() error {
	checkResult := check.Struct(e, fieldMap)

	err := entity.CheckFieldIDResult(checkResult)
	if err != nil {
		return err
	}

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

	return nil
}

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

	if strutils.IsStringNotEmpty(e.Name) {
		err := domain.CheckField(checkResult, e.DomainCNName(), FieldName)
		if err != nil {
			return err
		}
	}

	return nil
}