package mysql

import (
	"fmt"
	"gitea.party/public-messag-service/config/app_ser/component"

	"gorm.io/gorm"
)

var (
	Ns9 = component.MySQLClient{}
)

type Model interface {
	TableName() string
	DB() *gorm.DB
}

func GetNs9DB() *gorm.DB {
	return Ns9.DB
}
func GetById(m Model, id int) error {
	tx := m.DB().Where("id=?", id).Take(m)
	return tx.Error
}

func Add(m Model) error {
	tx := m.DB().Create(m)
	return tx.Error
}

func Save(m Model, id int, columns []string) error {
	tx := m.DB().Select(columns)
	tx.Where("id=?", id).Updates(m)
	return tx.Error
}

func OrderBySQL(orderBy string, order int, isNullBottom bool) string {
	if orderBy != "" {
		if isNullBottom {
			orderBy = fmt.Sprintf("IF(%s IS NULL, 0, 1) desc, %s", orderBy, orderBy)
		}
		if order == 0 { // 为0倒序，否则升序
			return fmt.Sprintf("%s desc", orderBy)
		} else {
			return fmt.Sprintf("%s asc ", orderBy)
		}
	}
	return ""
}

func GetOrderByStr(by string, order int, isNullBottom bool) string {
	if by != "" {
		if isNullBottom {
			by = fmt.Sprintf("IF(%s IS NULL, 0, 1) desc, %s", by, by)
		}
		if order == 1 { // 为0倒序，否则升序
			return fmt.Sprintf("%s desc ", by)
		} else {
			return fmt.Sprintf("%s asc ", by)
		}
	}
	return ""
}