package initialize

import (
	"gorm.io/driver/mysql"
	"gorm.io/gorm/logger"
	"gorm.io/gorm/schema"
	"log"
	"os"
	"time"

	"lcfns/global"

	"gorm.io/gorm"
)

func Gorm() *gorm.DB {
	m := global.Config.Mysql
	if m.Dbname == "" {
		return nil
	}
	mysqlConfig := mysql.Config{
		DSN:                       m.Dsn(), // DSN data source name
		DefaultStringSize:         191,     // string 类型字段的默认长度
		SkipInitializeWithVersion: false,   // 根据版本自动配置
	}
	if db, err := gorm.Open(mysql.New(mysqlConfig), config(m.Prefix, m.Singular)); err != nil {
		log.Fatalln("29:", err)
		return nil
	} else {
		db.InstanceSet("gorm:table_options", "ENGINE="+m.Engine)
		sqlDB, _ := db.DB()
		sqlDB.SetMaxIdleConns(m.MaxIdleConns)
		sqlDB.SetMaxOpenConns(m.MaxOpenConns)
		return db
	}
}

type DBBASE interface {
	GetLogMode() string
}

func config(prefix string, singular bool) *gorm.Config {
	config := &gorm.Config{
		NamingStrategy: schema.NamingStrategy{
			TablePrefix:   prefix,
			SingularTable: singular,
		},
		DisableForeignKeyConstraintWhenMigrating: true,
	}
	_default := logger.New(log.New(os.Stdout, "\r\n", log.LstdFlags), logger.Config{
		SlowThreshold: 200 * time.Millisecond,
		LogLevel:      logger.Warn,
		Colorful:      true,
	})
	var logMode DBBASE
	logMode = &global.Config.Mysql

	switch logMode.GetLogMode() {
	case "silent", "Silent":
		config.Logger = _default.LogMode(logger.Silent)
	case "error", "Error":
		config.Logger = _default.LogMode(logger.Error)
	case "warn", "Warn":
		config.Logger = _default.LogMode(logger.Warn)
	case "info", "Info":
		config.Logger = _default.LogMode(logger.Info)
	default:
		config.Logger = _default.LogMode(logger.Info)
	}
	return config
}