package db

import (
	"context"
	_ "github.com/go-sql-driver/mysql"
	"golib.gaore.com/GaoreGo/cast"
	"golib.gaore.com/GaoreGo/grlogs"
	_ "golib.gaore.com/GaoreGo/grlogs/logs/alils"
	"io"
	"os"
	"time"
	"xorm.io/core"
	"xorm.io/xorm"
	"xorm.io/xorm/log"
)

var engines map[string]*xorm.Engine

func SelectXorm(name string) *xorm.Engine {

	if name == "" {
		name = DEFAULT
	}
	return engines[name]
}

func LoadXorm(dsns map[string]dsnConfig) (err error) {

	engines = make(map[string]*xorm.Engine)

	var writer io.Writer = grlogs.GetAli("sql")

	// 测试环境下输出sql
	runmode := os.Getenv("CENTER_RUNMODE")

	for alias, dsn := range dsns {

		grlogs.GetAli("sql").Debug("init_db 正在加载数据 %s", dsn.Dsn)
		engine, err := xorm.NewEngine(dsn.Driver, dsn.Dsn)
		if err != nil {
			grlogs.GetAli("sql").Critical(err.Error())
		}

		logger := log.NewSimpleLogger(writer)
		tbMapper := core.NewPrefixMapper(core.SnakeMapper{}, cast.ToString(dsn.Item.Prefix))
		engine.SetTableMapper(tbMapper)
		engine.SetLogger(logger)

		if dsn.Item.MaxIdleConns <= 0 {
			engine.SetMaxIdleConns(200)
		} else {
			engine.SetMaxIdleConns(dsn.Item.MaxIdleConns)
		}

		if dsn.Item.MaxOpenConns <= 0 {
			engine.SetMaxOpenConns(200)
		} else {
			engine.SetMaxOpenConns(dsn.Item.MaxOpenConns)
		}

		if dsn.Item.ConnMaxLifetime > 0 {
			engine.SetConnMaxLifetime(time.Second * time.Duration(dsn.Item.ConnMaxLifetime))
		}

		engine.TZLocation, _ = time.LoadLocation("Asia/Shanghai")
		if runmode == "dev" {
			engine.ShowSQL(true)
		}

		ctx, _ := context.WithTimeout(context.Background(), time.Second*5)
		err = engine.PingContext(ctx)
		if err != nil {
			grlogs.GetAli("sql").Critical("---%s--- %s", alias, err.Error())
			os.Exit(-1)
		} else {
			engines[alias] = engine
		}
	}

	return
}

type XormInterface interface {
	Engine() *xorm.Engine
}