package weixin

import (
	"encoding/base64"
	"errors"

	"git.rosy.net.cn/jx-callback/business/auth2"
	"git.rosy.net.cn/jx-callback/business/auth2/authprovider"
	"git.rosy.net.cn/jx-callback/globals"
	"git.rosy.net.cn/jx-callback/globals/api"
)

type MiniAuther struct {
	authprovider.DefAuther
}

var (
	ErrAuthTypeShouldBeMini = errors.New("当前操作要求是小程序登录方式")
)

var (
	AutherObjMini *MiniAuther
)

func init() {
	AutherObjMini = new(MiniAuther)
	auth2.RegisterAuther(AuthTypeMini, AutherObjMini)
}

func (a *MiniAuther) VerifySecret(dummy, jsCode string) (authBindEx *auth2.AuthBindEx, err error) {
	globals.SugarLogger.Debugf("weixin mini VerifySecret jsCode:%s", jsCode)

	sessionInfo, err := api.WeixinMiniAPI.SNSCode2Session(jsCode)
	if err == nil {
		sessionKey := sessionInfo.SessionKey
		sessionInfo.SessionKey = ""
		if authBindEx, err = a.UnionFindAuthBind(AuthTypeMini, []string{AuthTypeWeixin, AuthTypeMini, AuthTypeMini}, sessionInfo.OpenID, sessionInfo.UnionID, sessionInfo); err == nil {
			authBindEx.UserData = sessionKey
		}
	}
	return authBindEx, err
}

// 特殊接口
func (a *MiniAuther) DecryptData(authInfo *auth2.AuthInfo, encryptedData, iv string) (decryptedDataBase64 string, err error) {
	globals.SugarLogger.Debugf("weixin mini DecryptData encryptedData:%s, iv:%s", encryptedData, iv)
	if authInfo.AuthBindInfo.Type != AuthTypeMini {
		return "", ErrAuthTypeShouldBeMini
	}
	sessionKey := authInfo.AuthBindInfo.UserData.(string)
	decryptedData, err := api.WeixinMiniAPI.SNSDecodeMiniProgramData(encryptedData, sessionKey, iv)
	if err != nil {
		return "", err
	}
	return base64.StdEncoding.EncodeToString(decryptedData), nil
}