package auth

import (
	"errors"
	"time"

	"git.rosy.net.cn/baseapi/utils"
	"git.rosy.net.cn/jx-callback/globals"
)

const (
	DefTokenDuration = 7 * 24 * time.Hour // 7天
)

type IAuther interface {
	Login(id, secret string) error
	Logout(id string) error
}

var (
	authers map[string]IAuther
)

var (
	ErrLoginTypeNotSupported = errors.New("不支持指定的登录类型")
)

type LoginInfo struct {
	ID        string
	LoginType string
	ExpiresIn int64
	Token     string
}

func init() {
	authers = make(map[string]IAuther)
}

func RegisterAuther(loginType string, handler IAuther) {
	authers[loginType] = handler
}

func Login(id, loginType, secret string) (loginInfo *LoginInfo, err error) {
	if handler := authers[loginType]; handler != nil {
		if err = handler.Login(id, secret); err == nil {
			token := utils.GetUUID()
			loginInfo = &LoginInfo{
				ID:        id,
				LoginType: loginType,
				ExpiresIn: time.Now().Add(DefTokenDuration).Unix(),
				Token:     token,
			}
			globals.Cacher.Set(token, loginInfo, DefTokenDuration)
			return loginInfo, nil
		}
	} else {
		err = ErrLoginTypeNotSupported
	}
	return nil, err
}

func Logout(token string) (err error) {
	loginInfo := new(LoginInfo)
	if err = globals.Cacher.GetAs(token, loginInfo); err == nil {
		if handler := authers[loginInfo.LoginType]; handler != nil {
			err = handler.Logout(loginInfo.ID)
		}
		globals.Cacher.Del(token)
	}
	return err
}

func GetUserInfo(token string) (loginInfo *LoginInfo, err error) {
	loginInfo = new(LoginInfo)
	if err = globals.Cacher.GetAs(token, loginInfo); err == nil {
		return loginInfo, nil
	}
	return nil, err
}