package global

import (
	"fmt"
	"gorm.io/driver/mysql"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
	"log"
	"runtime"
)

var (
	DBLink *gorm.DB
)

func SetupDBLink() error {
	var err error
	dsn := fmt.Sprintf("%s:%s@tcp(%s)/%s?%s",
		DatabaseSetting.UserName,
		DatabaseSetting.Password,
		DatabaseSetting.Host,
		DatabaseSetting.Db,
		DatabaseSetting.OtherParams,
	)
	//判断当前系统是windows还是linux
	//runtime获取的是当前Go语言框架的参数，不是实际运行的操作系统的参数
	sysType := runtime.GOOS
	if sysType == "windows" {
		DBLink, err = gorm.Open(mysql.Open(dsn), &gorm.Config{
			DisableForeignKeyConstraintWhenMigrating: true,
			Logger:                                   logger.Default.LogMode(logger.Info),
		})
		log.Print("当前系统为windows")
	} else if sysType == "linux" {
		DBLink, err = gorm.Open(mysql.Open(dsn), &gorm.Config{})
	}

	if err != nil {
		return err
	}
	return nil
}