package auth

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"

	"github.com/golang-jwt/jwt"
	"github.com/google/uuid"
	"github.com/zeromicro/go-zero/core/logx"
)

type UserInfo struct {
	UserId int64 `json:"userid"`
}

// 获取登录信息
func GetUserInfoFormCtx(ctx context.Context) UserInfo {
	uid, err := ctx.Value("userid").(json.Number).Int64()
	if err != nil {
		logx.Error("parse uid form context err:", err.Error())
		return UserInfo{}
	}
	return UserInfo{UserId: uid}
}

// 获取登录信息
func GetUserInfoFormMapClaims(claims jwt.MapClaims) (*UserInfo, error) {
	if userid, ok := claims["userid"]; ok {
		uid, ok := userid.(float64)
		if !ok {
			err := errors.New(fmt.Sprint("parse uid form context err:", userid))
			logx.Error("parse uid form context err:", err)
			return nil, err
		}

		return &UserInfo{UserId: int64(uid)}, nil
	} else {
		err := errors.New(`userid not in claims`)
		logx.Error(`userid not in claims`)
		return nil, err
	}
}

func GenerateJwtToken(accessSecret string, accessExpire, nowSec int64, userid int) (string, error) {
	claims := make(jwt.MapClaims)
	claims["exp"] = nowSec + accessExpire
	claims["iat"] = nowSec
	claims["userid"] = userid
	if userid == 0 {
		u, err := uuid.NewUUID()
		if err != nil {
			logx.Error(err)
			return "", err
		}
		claims["guestid"] = u.String() // TODO: 未完成
	}
	token := jwt.New(jwt.SigningMethodHS256)
	token.Claims = claims
	return token.SignedString([]byte(accessSecret))
}